NEWPARK RESOURCES INC
10-K405, 1999-03-31
REFUSE SYSTEMS
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                                 UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                   FORM 10-K

                ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF
                      THE SECURITIES EXCHANGE ACT OF 1934

FOR THE FISCAL YEAR ENDED DECEMBER 31, 1998         COMMISSION FILE NO. 1-2960

                            NEWPARK RESOURCES, INC.
             (Exact name of registrant as specified in its charter)

          DELAWARE                                         72-1123385
(State or other jurisdiction of                         (I.R.S. Employer
 incorporation or organization)                        Identification No.)

     3850 N. CAUSEWAY, SUITE 1770
          METAIRIE, LOUISIANA                                 70002
(Address of principal executive offices)                   (Zip Code)

                                 (504) 838-8222
                        (Registrant's telephone number)

          SECURITIES REGISTERED PURSUANT TO SECTION 12(b) OF THE ACT:

                                                         NAME OF EACH EXCHANGE
TITLE OF EACH CLASS                                       ON WHICH REGISTERED
- -------------------                                      ---------------------
Common Stock, $.01 par value                            New York Stock Exchange
8-5/8% Senior Subordinated Notes due 2007, Series B     New York Stock Exchange

     Indicate by check mark whether the registrant (1) has filed all reports
required to be filed by Section 13 or 15(d) of the Securities Exchange Act of
1934 during the preceding 12 months (or for such shorter period that the
registrant was required to file such reports), and (2) has been subject to such
filing requirements for the past 90 days. Yes [X] No [ ]

     Indicate by check mark if disclosure of delinquent filers pursuant to Item
405 of Regulations S-K is not contained herein, and will not be contained, to
the best of registrant's knowledge, in definitive proxy or information
statements incorporated by reference in Part III of this Form 10-K or any
amendment to this Form 10-K [X]

     At March 25, 1999, the aggregate market value of the voting stock held by
non-affiliates of the registrant was $487,619,736. The aggregate market value
has been computed by reference to the closing sales price on such date, as
reported by The New York Stock Exchange.

     As of March 25, 1999, a total of 68,884,951 shares of Common Stock, $.01
par value per share, were outstanding. 

                      DOCUMENTS INCORPORATED BY REFERENCE

     Pursuant to General Instruction G(3) to this form, the information
required by Part III (Items 10, 11, 12 and 13 hereof) is incorporated by
reference from the registrant's definitive Proxy Statement for its Annual
Meeting of Stockholders scheduled to be held on May 26, 1999.

                                  Page 1 of 75
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                            NEWPARK RESOURCES, INC.
                               INDEX TO FORM 10-K
                      FOR THE YEAR ENDED DECEMBER 31, 1998

<TABLE>
<CAPTION>
ITEM                                                                                PAGE
NUMBER            DESCRIPTION                                                       NUMBER
- ------            -----------                                                       ------
<S>               <C>                                                               <C>

                  PART I

     1            Business                                                           3

     2            Properties                                                        22

     3            Legal Proceedings                                                 24

     4            Submission of Matters to a Vote of Security Holders               24

                  PART II

     5            Market for the Registrant's Common Equity and
                      Related Stockholder Matters                                   25 

     6            Selected Financial Data                                           26

     7            Management's Discussion and Analysis of Financial
                      Condition and Results of Operations                           28

     7A           Quantitative and Qualitative Disclosures about Market Risk        40

     8            Financial Statements and Supplementary Data                       42

     9            Changes in and Disagreements with Accountants
                      on Accounting and Financial Disclosure                        70

                  PART III

     10           Directors and Executive Officers of the Registrant                71

     11           Executive Compensation                                            71

     12           Security Ownership of Certain Beneficial Owners
                      and Management                                                71

     13           Certain Relationships and Related Transactions                    71

                  PART IV

     14           Exhibits, Financial Statement Schedules, and Reports on 
                  Form 8-K                                                          73


                  Signatures                                                        75

                  Note:    The responses to Items 10, 11, 12 and 13 are
                           included in the registrant's definitive Proxy
                           Statement for its Annual Meeting of Stockholders
                           scheduled to be held on May 26, 1999. The required
                           information is incorporated into this Report by
                           reference to such document and is not repeated here.
</TABLE>


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<PAGE>   3
PART I

ITEM 1.  BUSINESS


GENERAL

         Newpark Resources, Inc.("Newpark" or the "Company") is a leading
provider of proprietary environmental services to the oil and gas exploration
and production industry, primarily in the U. S. Gulf Coast market. Services
provided by the Company, either individually or as part of a comprehensive
package, include: (i) processing and disposal of oilfield exploration and
production ("E&P") waste; (ii) drilling fluids and associated engineering and
technical services; (iii) fluids processing and recycling services at the rig
site, (iv) installation, rental and sale of temporary access roads and work
sites ("mat rental") in oilfield and other construction applications; and, (v)
other related on-site environmental and oilfield construction services. Newpark
has begun to offer its drilling fluids, fluids processing and management
services and waste disposal services in an integrated service offering which it
calls "Minimization Management". The Company believes that by offering this
integrated service approach to the needs of its customers it can differentiate
itself from its competitors and provide improved economics for its customers'
drilling operations.

         Most of the E&P waste received by Newpark is processed for injection
into environmentally secure geologic formations deep underground. Certain
volumes of waste are delivered to surface disposal facilities. The company
maintains the ability to process E&P waste into a product which can be used as
daily cover material or cell liner and construction material at two municipal
waste landfills, but does not currently utilize this method for a significant
volume of waste. Since 1994, Newpark has been licensed to process E&P waste
contaminated with naturally occurring radioactive material ("NORM"). The Company
currently operates under a license that authorizes the injection of NORM into
disposal wells at its Big Hill, Texas, facility, the only offsite facility in
the U. S. Gulf Coast licensed for this purpose. In the fourth quarter of 1997,
Newpark applied for permits to dispose of non-hazardous industrial waste at a
new facility, which will use its E&P waste disposal technology, to be
constructed adjacent to its existing NORM facility. The necessary permits were
issued in the first quarter of 1999, and the Company expects to enter this new
business during the third quarter of 1999.

         Newpark is a full service provider of drilling fluids and associated
engineering and technical services in the Gulf Coast market. The Company also
markets its services in Mexico through a joint venture with a Mexican company
and has recently expanded into Canada by the acquisition of two drilling fluids
companies and an environmental service company.

         Newpark focuses on providing unique solutions to highly technical
drilling projects involving complex conditions, as these projects require
critical engineering support of the fluids system during the drilling process to
ensure optimal performance at the lowest total well cost. The Company has
developed and begun to market several proprietary and patented products that
substitute for environmentally harmful substances commonly used in drilling
fluids and that contribute to environmental concern in the waste stream created
by drilling. Newpark has recently introduced a new water-based fluid system
incorporating these products, and is marketing the system under the
DeepDrill(TM) name. The Company believes that these new products will benefit
its customers in light of increasingly stringent environmental regulation
affecting the drilling operations.



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<PAGE>   4

         The Company has established its own barite grinding capacity to provide
critical raw materials for its drilling fluids operations and assembled the
service infrastructure necessary to participate in the U.S.
Gulf Coast and south Texas markets.

         Newpark provides temporary access roads and worksites in unstable soil
conditions, primarily in support of oil and gas exploration operations along the
U.S. Gulf Coast using its patented interlocking wooden mat systems. These mats
are typically rented to the customer for the duration of use, and are
occasionally sold to the customer to provide permanent access to a site or
facility. In 1994, Newpark began marketing its mat services for use in the
construction of pipelines, electrical distribution systems and highways in and
through wetlands environments. This has broadened the geographic area served by
Newpark to include the coastal areas of the Southeastern U.S., particularly
Florida and Georgia. Newpark also markets its mat services to the oil and gas
exploration industries in Venezuela and Canada. In the fourth quarter of 1998,
Newpark began utilizing a new composite plastic mat which, Newpark believes,
will in many applications replace the wooden mats which have been used since
1988. Newpark believes that the plastic mat provides significant economic
benefits due to its lighter weight, greater strength, freedom from repairs and
longer useful life.

         Newpark provides other services for its customers' oil and gas
exploration and production activities, including site assessment, waste pit
design, construction and installation, regulatory compliance assistance, site
remediation and closure, and general oilfield construction services, including
hook-up and connection of wells and installation of production equipment.

         Newpark was organized in 1932 as a Nevada corporation and in April 1991
changed its state of incorporation to Delaware. The Company's principal
executive offices are located at 3850 North Causeway Boulevard, Suite 1770,
Metairie, Louisiana 70002, and its telephone number is (504) 838-8222.

INDUSTRY FUNDAMENTALS

         Demand for Newpark's services has historically been driven by several
factors: (i) commodity pricing, (ii) oil and gas exploration and production
expenditures and activity; (iii) the desire to drill in more environmentally
difficult environments, such as the coastal marsh and inland waters near the
coastline ("transition zone") of the Gulf Coast, (iv) use of more complex
drilling techniques, which tend to generate more waste; and (v) increasing
environmental regulation of E&P waste and NORM.

         The demand for most of Newpark's services is related to the level of
oil and gas drilling activity as measured by the Baker-Hughes Rotary Rig Count.
During the fourth quarter of 1997, the number of drilling rigs working in the
U.S. Gulf Coast region reached its highest level since 1990, then began a
decline that has continued into the first quarter of 1999. The rig count in the
Company's principal market peaked in the first quarter of 1998 and had declined
36% by the end of the fourth quarter. That decline has continued during the
first quarter of 1999, recently reaching the lowest level ever recorded in the
history of the indicator, which began over 50 years ago.

         Newpark believes that technological advances that have reduced the risk
and cost of finding oil and gas are an important factor in the economics faced
by the industry. These advances include the use of three-dimensional seismic
data and the computer-enhanced interpretation of 



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that data, which increases the likelihood of drilling a successful well, and
improved drilling tools and fluids, which facilitate faster drilling and reduce
the overall cost. These advances also have increased the willingness of
exploration companies to drill in coastal marshes and inland waters, and to
drill deeper wells. Such projects rely heavily on services such as those
provided by Newpark. Deeper wells require the construction of larger locations
to accommodate larger drilling rigs and the equipment for handling drilling
fluids and associated wastes. Such locations are generally in service for
significantly longer periods, generating additional mat rental revenues. Deeper
wells also require more complex drilling fluid programs, which generate wastes
that are more difficult and costly to dispose of than those from simpler systems
used in shallower wells.

         The oilfield market for environmental services has grown due to
increasingly stringent regulations restricting the discharge of exploration and
production wastes into the environment. Louisiana, Texas and other states have
enacted comprehensive laws and regulations governing the proper handling of E&P
waste and NORM, and regulations have been proposed in other states. As a result,
generators of waste and landowners have become increasingly aware of the need
for proper treatment and disposal of such waste in both the drilling of new
wells and the remediation of production facilities.

         For many years, prior to current regulation, industry practice was to
allow E&P waste to remain in the environment. Onshore, surface pits were used
for the disposal of E&P waste; offshore or in inland waters, E&P waste was
discharged directly into the water. Since 1990, E&P waste has become subject to
increased public scrutiny and increased federal and state regulation. These
regulations have imposed strict requirements for ongoing drilling and production
activities in certain geographic areas, as well as for the remediation of sites
contaminated by past disposal practices and, in many respects, have prohibited
the prior disposal practices. In addition, operators have become increasingly
concerned about long-term liability for remediation, and landowners have become
more aggressive in requiring land restoration. For these reasons, operators are
increasingly retaining service companies such as Newpark to devise and implement
comprehensive waste management techniques to handle waste on an ongoing basis
and to remediate past contamination of oil and gas properties.

         The Clean Water Act is the primary legislation resulting in these
regulations. Between 1990 and 1995, substantially all discharges of waste from
drilling and production operations on land (the "onshore subcategory") and in
the transition zone (the "coastal subcategory") were prohibited. This "zero
discharge" standard has become the expected pattern for the industry. Effective
December 4, 1997, discharges of waste from drilling operations in state
territorial waters of the Gulf of Mexico (the "territorial waters subcategory"),
were prohibited. Newpark immediately noticed an increase in waste volume
received from this subcategory in its daily operations. However, as drilling
projects in progress as of that date were completed, most of the rigs
subsequently moved outside of the area covered by those regulations. Since
December 4, 1997, the offshore waters of the Gulf of Mexico have been the only
surface waters of the United States into which such waste discharges are
allowed. Recent EPA rulemaking efforts have been directed towards the further
restriction of discharges into those waters. Recent Federal Register notices
indicate that such restrictions are expected by January, 2000. More strict
enforcement of the requirements of the Clean Water Act is expected to ultimately
result in similar "zero discharge" regulations affecting the offshore waters of
the Gulf of Mexico. However, the timing of the implementation of these
regulations is uncertain.



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<PAGE>   6

         NORM regulations require more stringent worker protection, handling and
storage procedures than those required of E&P waste under Louisiana regulations.
Equivalent rules governing the disposal of NORM have also been adopted in Texas,
and similar regulations have been adopted in Mississippi, New Mexico, and
Arkansas.

BUSINESS STRENGTHS

         Proprietary Products and Services. Over the past 15 years, Newpark has
acquired, developed, and continues to improve its patented or proprietary
technology and know-how which has enabled the Company to provide innovative and
unique solutions to oilfield construction and waste disposal problems. The
Company has developed and expects to continue to introduce similarly innovative
products in its drilling fluids business. Newpark believes that increased
customer acceptance of its proprietary products and services will enable it to
take advantage of any upturn in drilling and production activity.

         Injection of Waste. Since 1993, Newpark has developed and used
proprietary technology to dispose of E&P waste by low-pressure injection into
unique geologic structures deep underground. In December 1996, Newpark was
issued patents covering its waste processing and injection operations. Newpark
believes that its injection technology is currently the most cost-effective
method for the offsite disposal of oilfield wastes and that this technology is
suitable for disposal of other types of waste. Newpark was recently granted a
new permit to construct and operate a non-hazardous industrial waste injection
disposal facility in Texas.

         Patented Mats. Newpark owns or licenses several patents that cover its
wooden mats and subsequent improvements. To facilitate entry into new markets
and reduce the Company's dependence on the supply of hardwoods, Newpark has
obtained the exclusive license for a new patented composite mat manufactured
from recycled plastics and other materials. Through a 49% owned joint venture
that owns and operates the manufacturing facility, Newpark began taking delivery
of these mats in the fourth quarter of 1998. The Company expects that over the
next three years it will convert the majority of its mat fleet to the new
composite product. However, a portion of the fleet will continue to be made up
of the wooden mats.

         Low Cost Infrastructure. Newpark has assembled an infrastructure in the
U.S. Gulf Coast region that includes injection disposal sites, transfer
stations, barges, mat inventories, mat service centers, a hardwood sawmill to
produce lumber for the construction of mats, drilling fluids distribution
centers, service facilities and barite mills to supply raw materials for the
make-up of drilling fluids.

         Integration of Services. Newpark believes it is one of the few
companies in the U.S. Gulf Coast able to provide a package of integrated
services and offer a "one-stop shop" approach to solving customers' problems.

         Beginning in mid-1998, Newpark has offered a unique integrated package
of services that include the provision of the fluids, the on-site processing of
the material returned from the well bore to better separate the cuttings or
tailings from the fluids, and the disposal of the tailings and associated waste
products. Newpark believes that its separation technology is significantly more
effective than conventional equipment, resulting in more complete separation of
fluids from waste, reducing both the quantity of fluids needed to drill the well
and the total volume of waste taken off site for disposal, thereby reducing the
customer's well cost.



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<PAGE>   7

         Newpark's mats provide the access roads and work sites for a majority
of the land drilling in the Gulf Coast market. Its on-site and off-site waste
management services are frequently sold in combination with mat rental services.
Newpark's entry into the drilling fluids business has created the opportunity
for it to market drilling fluids with other related services, including
technical and engineering services, disposal of used fluids and other waste
material, construction services, site cleanup and site closure. Consequently,
Newpark believes that it is uniquely positioned to take advantage of the
industry trend towards outsourcing and vendor consolidation.

         Experience in the Regulatory Environment. Newpark believes that its
operating history provides it with a competitive advantage in the highly
regulated oilfield waste disposal business. As a result of working closely with
regulatory officials and citizens' groups, Newpark has gained acceptance for its
proprietary injection technology and has received a series of permits for the
Company' s disposal facilities, including a permit allowing the disposal of NORM
at Newpark's Big Hill, Texas facility. These permits enable Newpark to expand
its business and operate cost-effectively. Newpark believes that its proprietary
injection method is superior to alternative methods of disposal of oil field
wastes, including landfarming, because injection provides greater assurance that
the waste is permanently isolated from the environment and will not contaminate
adjacent property or groundwater. Newpark further believes that increasing
environmental regulation and activism will inhibit the widespread acceptance of
other disposal methods and the permitting of additional disposal facilities.

         Experienced Management Team. Newpark's executive and operating
management team has built and augmented Newpark's capabilities over the past ten
years, allowing it to develop a base of knowledge and a unique understanding of
the oilfield construction and waste disposal markets. Newpark's executive and
operating management team has an average of 22 years of industry experience, and
an average of 10 years with Newpark, including several who have been with
Newpark for 20 years or more. Newpark has strengthened its management team by
retaining key management personnel of the companies it has acquired and by
attracting additional experienced personnel.

BUSINESS STRATEGY

         Implement Newpark's Minimization Management Concept. Newpark's strategy
is to integrate its operations to provide a "one-stop shop" approach to solving
customers' problems. By integrating its drilling fluids solids control services,
and waste disposal services with other on-site services, Newpark intends to
provide a comprehensive solution to the management of the total fluids stream.
Newpark calls this concept "Minimization Management" and believes that its
ability to provide a comprehensive package of products and services reduces the
total cost to the customer and increases operating efficiency.



                                       7
<PAGE>   8

         Service and Product Extensions. Newpark believes that it can apply the
waste processing and injection technology it has pioneered and developed in the
oil and gas exploration industry to other industrial waste markets. Initially,
Newpark intends to focus on wastes generated in the petrochemical processing and
refining industries, as many potential customers in these industries are located
in the markets already served by Newpark, and certain wastes generated by these
industries have many of the same characteristics as the E&P waste currently
handled by Newpark. In addition, Newpark will continue to evaluate the
applicability of its injection disposal methods to other industrial waste
streams. Newpark has begun using a composite plastic mat system to enhance its
current mat fleet and expand into new markets. Newpark believes that these
composite mats may have certain military and emergency response applications for
which the wooden mats were not suitable due to their limited storage life.

         Cost Reductions. Since the third quarter of 1998, Newpark has
implemented a program of operating cost and expense reductions throughout the
company in order to reposition its operations for the current low level of
activity. Newpark will continue to pursue cost reductions in its existing
operations to increase margins.

         Newpark has implemented washwater recycling facilities at its principal
E&P waste transfer stations. These methods allow Newpark to reduce the volume of
waste transported and disposed of in its injection wells. Newpark intends to
continue to consolidate certain facilities, supply and purchasing functions in
its drilling fluids business to eliminate duplicate costs, and take advantage of
manufacturer direct pricing, volume discounts and rail transportation
efficiencies.

DESCRIPTION OF BUSINESS

E & P WASTE DISPOSAL

         E&P Waste Processing. In most jurisdictions, E&P waste, if not treated
for discharge or disposed of on the location where it is generated, must be
transported to a licensed E&P waste disposal or treatment facility. Three
primary alternatives for offsite disposal of E&P waste are available to
generators in the U.S. Gulf Coast: (i) underground injection (see "Injection
Wells"); (ii) disposal in surface facilities; and (iii) processing and
conversion into a reuse product. In addition, a portion of the waste can be
recycled into a drilling fluids product.

         The volume of waste handled by the Company in 1996, 1997 and 1998 is
summarized in the table below:

<TABLE>
<CAPTION>
(barrels in thousands)              1998      1997      1996
- ----------------------              ----      ----      ----
<S>                                <C>       <C>       <C>  
Drilling and Production            4,746     5,329     3,588
Remediation Activity                 206        92       368
                                   -----     -----     -----
Total                              4,952     5,421     3,956
</TABLE>


         In August 1996, Newpark completed the acquisition of substantially all
of the marine-related E&P waste collection operations, excluding landfarming
facilities and associated equipment of its largest competitor. In the
acquisition, Newpark acquired certain leases associated with five transfer
stations located along the U.S. Gulf Coast and three receiving docks



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<PAGE>   9

at the landfarm facilities now operated by a subsidiary of U. S. Liquids, Inc.
The acquisition significantly increased Newpark's E&P waste disposal business.

         Newpark operates nine receiving and transfer facilities located along
the U.S. Gulf Coast from Venice, Louisiana, to Corpus Christi, Texas. Waste
products are collected at the transfer facilities from three distinct
exploration and production markets: offshore; land and inland waters; and from
remediation operations at well sites and production facilities. These facilities
are supported by a fleet of 36 double-skinned barges certified by the U. S.
Coast Guard to transport E&P waste. Waste received at the transfer facilities is
transported by barge through the Gulf Intracoastal Waterway to Newpark's
processing and transfer facility at Port Arthur, Texas, and trucked to injection
disposal facilities at Fannett, Texas. Since the third quarter of 1995, the
Fannett facility has served as Newpark's primary E&P waste injection facility.

         Improved processing equipment and techniques and increased injection
capacity has reduced the volume of waste processed for reuse and delivered to
local municipal landfills as a reuse product. Landfills are required by
regulations to cover the solid waste deposited in the facility daily with earth
or other inert material. Newpark's reuse product is deposited at either the City
of Port Arthur Municipal Landfill or the City of Beaumont Municipal Landfill for
use as cover or construction material pursuant to contracts with the respective
cities. Newpark also has developed alternative uses for the product as roadbase
material or construction fill material.

         NORM Processing and Disposal. Many alternatives are available to the
generator for the treatment and disposal of NORM. These include both chemical
and mechanical methods designed to achieve volume reduction, on-site burial of
encapsulated NORM within old well bores and soil washing and other techniques of
dissolving and suspending the radium in solution for onsite injection of NORM
liquids. When the application of these techniques are not economically
competitive with offsite disposal, or insufficient to bring the site into
compliance with applicable regulations, the NORM must be transported to a
licensed storage or disposal facility. Newpark was initially licensed to operate
a NORM disposal business in September 1994 and began operations October 21,
1994. Since May 21, 1996, Newpark has disposed of NORM by injection disposal at
its Big Hill, Texas facility. During 1998, Newpark received 16,500 barrels of
NORM contaminated waste, as compared to 52,400 barrels in 1997 and 143,500
barrels in 1996.

         Non-hazardous Industrial Waste. In September 1997, Newpark began the
licensing process to obtain authority to build and operate a facility that will
process and dispose of non-hazardous industrial waste. The permits were issued
in February 1999, and operations are expected to begin by the third quarter of
1999. Initially, Newpark intends to focus on wastes generated in the
petrochemical processing and refining industries.

         Injection Wells. Newpark's injection technology is distinguished from
conventional methods in that it utilizes very low pressure, typically under 100
pounds psi, to move the waste into the injection zone. Conventional wells
typically use pressures of 2,000 pounds psi or more. In the event of a formation
failure or blockage of the face of the injection zone, such pressure can force
waste material beyond the intended zone, posing a potential hazard to the
environment. The low pressure used by Newpark is inadequate to drive the
injected waste from its intended geologic injection zone.

         Newpark began using injection for disposal of E&P waste in April 1993.
Under a permit from the Texas Railroad Commission, Newpark began to develop a 50
acre injection well facility in 



                                       9
<PAGE>   10


the Big Hill Field in Jefferson County, Texas. During 1995, Newpark licensed and
built a new injection well facility at a 400 acre site near Fannett, Texas,
which was placed in service in September 1995 and now serves as Newpark's
primary facility for the disposal of E&P waste. The Company has subsequently
acquired several additional injection disposal sites, and now holds an inventory
of approximately 1,250 acres of injection disposal property in Texas and
Louisiana.

         Newpark has identified a number of additional sites in the U.S. Gulf
Coast region as suitable for disposal facilities, has received permits for one
additional site in Texas, and plans to file for additional permit authority in
Louisiana. Newpark believes that its current processing and disposal capacity
will be adequate to provide for expected future demand for its oilfield waste
disposal and other environmental services.

         Newpark believes that its patented injection technology has application
to other industrial waste markets and waste streams. In January 1997, Newpark
acquired approximately 400 acres of mineral assets, including 120 surface acres
adjacent to its Big Hill site, part of which it is developing into an industrial
waste disposal facility. A permit was received for this facility in March, 1999,
and operations are expected to begin in the third quarter of 1999.

FLUIDS SALES AND ENGINEERING

         Newpark entered the drilling fluids market as a means of distributing
recycled products recovered from its waste business and to provide
environmentally safe high performance fluid systems. In response to weak pricing
due to current market conditions, the Company has temporarily suspended its
offsite recycling operations, but maintains the capability of producing this
product, and expects to resume recycling operations when market conditions
permit. The capacity to provide complete drilling fluids service to its
customers was a key step towards implementation of Newpark's Minimization
Management strategy. Newpark focuses on highly technical drilling projects
involving complex conditions, such as deep horizontal drilling or deep water
drilling. These projects require constant monitoring and critical engineering
support of the fluids system during the drilling process.

         In February 1997, Newpark completed the acquisition of SBM (now known
as Newpark Drilling Fluids, Inc.), a full-service provider of drilling fluids
and associated engineering and technical services to the onshore and offshore
oil and gas exploration industry in the Gulf Coast market. Newpark has
subsequently expanded its drilling fluids operations through additional
acquisitions in order to broaden its customer base and obtain the services of
key employee-owners of the acquired companies. During 1997, these acquisitions
included four retail drilling fluids companies, one wholesale drilling fluids
company and one specialty chemical company. In November 1997, Newpark completed
the acquisition of certain Louisiana and Texas assets of Anchor Drilling Fluids
USA, Inc., which have enhanced Newpark's service capability in the offshore Gulf
of Mexico. During 1998, the Company completed ten acquisitions by which it
extended its service area to west Texas, Oklahoma, and Canada, and strengthened
its market position on the Gulf Coast.

         In May 1997, Newpark acquired a specialty milling company that grinds
barite and other industrial minerals at facilities in Houston, Texas and New
Iberia, Louisiana. The acquisition and subsequent expansion of that company's
milling capacity has provided Newpark access to critical raw materials for its
drilling fluids operations. The Company has also entered into several 



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<PAGE>   11

contract grinding agreements under which contract mills grind raw barite
supplied by Newpark for a fixed fee. These agreements help assure the Company
adequate supplies of raw materials.

MAT RENTAL AND INTEGRATED SERVICES

Mat rental and sales.

          In 1988, Newpark acquired the right to use, in Louisiana and Texas, a
patented prefabricated interlocking wooden mat system for the construction of
drilling and work sites, which displaced the use of individual hardwood boards.
This system is quicker to install and remove than individual hardwood boards,
substantially reducing labor costs. Prefabricated mats are also stronger, easier
to repair and maintain, and generate less waste material during construction and
removal. In 1994, Newpark acquired the exclusive right to use this system in the
continental U.S. for the life of the patent. The most recent patents expire in
2007. The original holder of the patent continues to fabricate the mats for
Newpark and acts as a distributor of mats for non-oilfield applications. As of
December 31, 1998, Newpark had approximately 186,000 wooden mats in inventory,
including mats in Venezuela and Canada.

         Beginning in 1994, Newpark began exploring other products which could
substitute for wood in the construction of mats. In 1997, the Company formed a
joint venture to manufacture a new plastic mat designed to be lighter, stronger,
and more durable than the wooden mats currently in use. The manufacturing
facility was completed in the third quarter of 1998 and immediately began
production of the new composite mats. Newpark has taken delivery of 3,500 of the
composite mats since production began in September 1998. Newpark expects the
facility's production rate to increase to approximately 3,000 mats per month by
the fourth quarter of 1999. While the Company intends to replace a large portion
of its wooden mats with composite mats, it will maintain some level of wooden
mats in its fleet.

         Markets. Newpark provides mats to the oil and gas industry to ensure
all-weather access to exploration and production sites in the unstable soil
conditions common along the onshore Gulf of Mexico. Newpark also provides access
roads and temporary work sites to the pipeline, electrical utility and highway
construction industries where protection of the soil is required by
environmental regulations or to assure productivity in unstable soil conditions.
Newpark has performed projects in connection with pipeline, electrical utility
and highway construction projects in Georgia, Florida, Texas and Louisiana.
Revenue from this source was approximately $5.8 in 1996, approximately $1.4
million in 1997 and approximately $4.5 million in 1998. Newpark believes that
the decline in revenues in 1997 was caused by deferral of capital expenditures
in the electric utility industry while the industry adjusted to deregulation and
that the subsequent increase in 1998 reflects the resumption of normal capital
spending patterns.

         Rerentals and Sales. Drilling and work sites are typically rented by
the customer for an initial period of 60 days. Often, the customer extends the
rental term for additional 30 day periods, resulting in additional revenues to
Newpark. These rerental revenues provide higher margins because only minimal
incremental depreciation and maintenance costs accrue to each rerental period.
Factors which may increase rerental revenue include: (i) the trend toward
increased activity in the "transition zone"; (ii) a trend toward deeper
drilling, taking a longer time to reach the desired target; and (iii) the
increased frequency of commercial success, requiring logging, testing, and
completion (hook-up), extending the period during which access to the site is
required. Occasionally, the mats are purchased by the customer when a site is
converted into a permanent worksite.



                                       11
<PAGE>   12

         International Markets. 

         Venezuela. The Venezuelan government has enacted legislation designed
to speed the opening of its petroleum sector to foreign investment, including
international oil companies, in furtherance of a national objective of
increasing that country's production of oil to five million barrels per day by
the year 2005. Many of the international oil companies investing in Venezuela
are existing customers of Newpark. As of December 31, 1998, Newpark had
approximately 19,000 mats in inventory in Venezuela. Newpark expects that
activity in Venezuela will increase as further exploration concessions are
granted.

         Canada. The Company began shipping mats to Canada in the first quarter
of 1998, and believes that the Canadian market will develop somewhat more
quickly than other international markets. At December 31, 1998, approximately
7,000 mats had been shipped to this new market.

Other Integrated Services

         Promulgation and enforcement of increasingly stringent environmental
regulations affecting drilling and production sites has increased the scope of
services required by the oil companies. Often it is more efficient for the site
operator to contract with a single company that can provide all-weather site
access and provide the required onsite and offsite environmental services on a
fully integrated basis. Newpark provides a comprehensive range of environmental
services necessary for its customers' oil and gas exploration and production
activities. These services include:

         Site Assessment. Site assessment work begins prior to installation of
mats on a drilling site, and generally begins with a study of the proposed well
site, which includes site photography, background soil sampling, laboratory
analysis and investigation of flood hazards and other native conditions. The
assessment determines whether the site has previously been contaminated and
provides a baseline for later restoration to pre-drilling condition.

         Pit Design, Construction and Drilling Waste Management. Where permitted
by regulations and landowners, under its Environmentally Managed Pit ("EMP")
Program, Newpark constructs waste pits at drilling sites and monitors the waste
stream produced in drilling operations and the contents and condition of the
pits with the objective of minimizing the amount of waste generated on the site.
Where possible, Newpark disposes of waste onsite by landfarming, through
chemical and mechanical treatment of liquid waste and by annular injection into
a suitably permitted underground formation. Waste water treated onsite may be
reused in the drilling process or, where permitted, discharged into adjacent
surface waters.

         Regulatory Compliance. Throughout the drilling process, Newpark assists
the operator in interfacing with the landowner and regulatory authorities.
Newpark also assists the operator in obtaining necessary permits and in
complying with record maintenance and reporting requirements.




                                       12
<PAGE>   13

         Site Remediation.

         E&P Waste (Drilling). At the completion of the drilling process, under
applicable regulations, wastewater on the site may be chemically and/or
mechanically treated to eliminate its waste-like characteristics and discharged
into surface waters. Other waste that may not remain on the surface of the site
may be land-farmed on the site or injected under permit into geologic formations
to minimize the need for offsite disposal. Any waste that cannot, under
regulations, remain onsite is manifested and transported to an authorized
facility for processing and disposal at the direction of the generator or
customer.

         E&P Waste (Production). Newpark also provides services to remediate
production pits and inactive waste pits, including those from past oil and gas
drilling and production operations. Newpark provides the following remediation
services: (i) analyzing of the contaminants present in the pit and determining
whether remediation is required by applicable state regulation; (ii) treating
waste onsite and, where permitted, reintroducing that material into the
environment; and (iii) removing, containerizing and transportating E&P waste to
Newpark's processing facility.

         NORM. In January 1994, Newpark became a licensed NORM contractor,
allowing Newpark to perform site remediation work at NORM contaminated
facilities in Louisiana and Texas, and subsequently have received licenses to
perform NORM remediation in other states. Because of the need for increased
worker-protective equipment, extensive decontamination procedures and other
regulatory compliance issues at NORM facilities, the cost of providing such
services is materially greater than at E&P waste facilities and such services
generate proportionately higher revenues and operating margins than similar
services at E&P waste facilities.

         Site Closure. Site closure services are designed to restore a site to
its pre-drilling condition, replanted with native vegetation. Closure also
involves delivery of test results indicating that closure has been completed in
compliance with applicable regulations. This information is important to the
customer because the operator is subject to future regulatory review and audits.
In addition, the information may be required on a current basis if the operator
is subject to a pending regulatory compliance order.

         General Oilfield Construction Services. Newpark performs general
oilfield construction services throughout the U.S. Gulf Coast area between
Corpus Christi, Texas and Pensacola, Florida. General oilfield services
performed by Newpark include preparing work sites for the installation of mats,
connecting wells and placing them in production, laying flow lines and infield
pipelines, building permanent roads, grading, lease maintenance (the maintenance
and repair of producing well sites), cleanup and general roustabout services.
General oilfield services are typically performed under short-term time and
material contracts, which are obtained by direct negotiation or bid.

         Wood Product Sales. Newpark owns a sawmill in Batson, Texas, which
provides access to adequate quantities of hardwood lumber in support of its mat
business. The mill's products include lumber, timber, and wood chips, as well as
bark and sawdust. Pulp and paper companies in the area supply a large proportion
of the hardwood logs processed at the sawmill and, in turn, are the primary
customers for wood chips created in the milling process. Newpark believes that
the capacity of the sawmill will be sufficient to meet its anticipated needs for
the foreseeable future.



                                       13
<PAGE>   14

SOURCES AND AVAILABILITY OF RAW MATERIALS AND EQUIPMENT

         Newpark believes that its sources of supply for any materials or
equipment used in its businesses are adequate for its needs and that it is not
dependent upon any one supplier. Newpark acquires the majority of its hardwood
needs in its mat business from its own sawmill. The hardwood logs are obtained
from loggers who operate in relatively close proximity to the mill. Barite used
in Newpark's drilling fluids business is provided by its specialty milling
company and, to a limited extent, by E&P waste recycling. In addition, barite is
obtained from third party mills under contract grinding arrangements. The raw
barite ore used by the mills is obtained under supply agreements from foreign
sources. Other materials used in the drilling fluids business are obtained from
various third party suppliers. No serious shortages or delays have been
encountered in obtaining any raw materials and Newpark does not currently
anticipate any such shortages or delays.

         Newpark obtains certain patented chemical compounds under long-term
supply contracts with various chemical manufacturers. Newpark owns the patent
rights for these products, and if the current supplier is unable to provide the
products in sufficient quantities, Newpark believes that it can arrange suitable
supply agreements with other manufacturers.

         The new composite mats, which are intended to substantially replace the
Company's current mat fleet, are manufactured through a joint venture in which
Newpark has a 49% interest. The resins, chemicals and other materials used to
manufacture the mats are widely available in the market.

         Logging activities are generally conducted during the drier weather
months of May through November. During this period, inventory increases
significantly at the sawmill and is consumed throughout the remainder of the
year. Raw barite is imported primarily from China and India. Due to the lead
times involved in obtaining barite, a 90 day or greater supply of barite is
maintained at the grinding facilities at all times.

PATENTS AND LICENSES

         Newpark seeks patents and licenses on new developments whenever
feasible. On December 31, 1996, Newpark was granted a U.S. patent on its E&P
waste and NORM waste processing and injection disposal system. Newpark has the
exclusive, worldwide license for the life of the patent to use, sell and lease
the wooden and composite mats that it uses in connection with its site
preparation business. The licensor of the wooden mats continues to fabricate the
mats for Newpark and has the right to sell mats in locations where Newpark is
not engaged in business, but only after giving Newpark the opportunity to take
advantage of the opportunity itself. Newpark has the exclusive right to the use
and resale of the new composite mats. Both licenses are subject to a royalty
which Newpark can satisfy by purchasing specified quantities of mats annually
from the licensor. In its drilling fluids business, the Company has obtained a
patent on its DeepDrillTM product and owns the patent on the two primary
components of this product. The Company has obtained the exclusive right to use
two patented oilfield processing units, which are essential to its MM process.

         The utilization of proprietary technology and systems is an important
aspect of Newpark's business strategy. For example, Newpark relies on a variety
of unpatented proprietary technologies and know-how in the processing of E&P
waste. Although Newpark believes that this 



                                       14
<PAGE>   15

technology and know-how provide it with significant competitive advantages in
the environmental services business, competitive products and services have been
successfully developed and marketed by others. Newpark believes that its
reputation in its industry, the range of services offered, ongoing technical
development and know-how, responsiveness to customers and understanding of
regulatory requirements are of equal or greater competitive significance than
its existing proprietary rights.

CUSTOMERS

         Newpark's customers are principally major and independent oil and gas
exploration and production companies operating in the U.S. Gulf Coast area, with
the vast majority of Newpark's customers concentrated in Louisiana and Texas.

         During the year ended December 31, 1998, approximately 44% of Newpark's
revenues were derived from 20 major customers, including five major oil
companies, and no one customer accounted for more than 10% of the Company's
consolidated revenues. Given current market conditions and the nature of the
products involved, Newpark does not believe that the loss of any single customer
would have a material adverse effect upon Newpark.

         Newpark performs services either pursuant to standard contracts or
under longer term negotiated agreements. As most of Newpark's agreements with
its customers are cancelable upon limited notice, Newpark's backlog is not
significant.

         Newpark does not derive a significant portion of its revenues from
government contracts of any kind.

COMPETITION

         Newpark operates in several niche markets where it is a leading
provider of services. In Newpark's disposal business, Newpark often competes
with its major customers, who continually evaluate the decision whether to use
internal disposal methods or utilize a third party disposal company such as
Newpark. Other product markets are fragmented and highly competitive, with many
competitors providing similar products and services to the industry. In the
drilling fluids industry, Newpark faces competition from both larger companies
that may have broader geographic coverage, and smaller companies that may have
lower capital cost structures.

         Newpark believes that the principal competitive factors in its
businesses are price, reputation, technical proficiency, reliability, quality,
breadth of services offered and managerial experience. Newpark believes that it
effectively competes on the basis of these factors and that its competitive
position benefits from its proprietary position with respect to the patented mat
system used in its site preparation business, its proprietary treatment and
disposal methods for both E&P waste and NORM waste streams and its ability to
provide its customers with an integrated well site management program including
environmental, drilling fluids and general oilfield services. Additionally, it
is often more efficient for the site operator to contract with a single company
that can prepare the well site and provide the required onsite and offsite
environmental services. Newpark believes that its ability to provide a number of
services as part of a comprehensive program enables Newpark to price its
services competitively.



                                       15
<PAGE>   16

ENVIRONMENTAL DISCLOSURES

         Newpark has sought to comply with all applicable regulatory
requirements concerning environmental quality. Newpark has made, and expects to
continue to make, the necessary expenditures for environmental protection and
compliance at its facilities, but does not expect that these will become
material in the foreseeable future. No material expenditures for environmental
protection or compliance were made during 1997 or 1998.

         Newpark derives a significant portion of its revenue from providing
environmental services to its customers. These services have become necessary in
order for these customers to comply with regulations governing the discharge of
materials into the environment. Substantially all of Newpark's capital
expenditures made in the past several years, and those planned for the
foreseeable future, are directly or indirectly influenced by the needs of
customers to comply with such regulations.

EMPLOYEES

         At February 28, 1999, Newpark employed 1,242 full and part-time
personnel, none of which are represented by unions. Newpark considers its
relations with its employees to be satisfactory.

ENVIRONMENTAL REGULATION

         Newpark deals primarily with E&P waste and NORM in its waste disposal
business. E&P waste and NORM are generally described as follows:

         E&P Waste. Oilfield Exploration and Production Waste, or E&P waste, is
waste generated in the exploration for or production of oil and gas. These
wastes typically contain levels of oil and grease, salts or chlorides, and heavy
metals in excess of concentration limits defined by state regulators. E&P waste
also includes soils which have become contaminated by these materials. In the
environment, oil and grease and chlorides disrupt the food chain and have been
determined by regulatory authorities to be harmful to plant and animal life.
Heavy metals are toxic and can become concentrated in living tissues.

         NORM. Naturally Occurring Radioactive Material, or NORM, is present
throughout the earth's crust at very low levels. Among the radioactive elements,
only Radium 226 and Radium 228 are slightly soluble in water. Because of their
solubility, which can carry them into living plant and animal tissues, these
elements may present a hazard. Radium 226 and Radium 228 can be leached out of
hydrocarbon bearing strata deep underground by salt water which is produced with
the hydrocarbons. Radium can coprecipitate with scale out of the production
stream as it is drawn to the surface and encounters a pressure or temperature
change in the well tubing or production equipment, forming a rust-like scale.
This scale contains radioactive elements which, over many years, can become
concentrated on tank bottoms or at water discharge points at production
facilities. Thus, NORM waste is E&P waste that has become contaminated with
these radioactive elements above concentration levels defined by state
regulatory authorities.

         Newpark's business is affected both directly and indirectly by
governmental regulations relating to the oil and gas industry in general, as
well as environmental, health and safety regulations that have specific
application to Newpark's business. Newpark, through the routine course of
providing its services, handles and profiles hazardous regulated material for
its 



                                       16
<PAGE>   17

customers. Newpark also handles, processes and disposes of nonhazardous
regulated materials. This section discusses various federal and state pollution
control and health and safety programs that are administered and enforced by
regulatory agencies, including, without limitation, the U.S. Environmental
Protection Agency ("EPA"), the U.S. Coast Guard, the U.S. Army Corps of
Engineers, the Texas Natural Resource Conservation Commission, the Texas
Department of Health, the Texas Railroad Commission, the Louisiana Department of
Environmental Quality and the Louisiana Department of Natural Resources. These
programs are applicable or potentially applicable to Newpark's current
operations. Although Newpark intends to make capital expenditures to expand its
environmental services capabilities in response to customers' needs, Newpark
believes that it is not presently required to make material capital expenditures
to remain in compliance with federal, state and local provisions relating to the
protection of the environment.

         RCRA. The Resource Conservation and Recovery Act of 1976, as amended in
1984 ("RCRA"), is the principal federal statute governing hazardous waste
generation, treatment, storage and disposal. RCRA and state hazardous waste
management programs govern the handling and disposal of "hazardous wastes". The
EPA has issued regulations pursuant to RCRA, and states have promulgated
regulations under comparable state statutes, that govern hazardous waste
generators, transporters and owners and operators of hazardous waste treatment,
storage or disposal facilities. These regulations impose detailed operating,
inspection, training and emergency preparedness and response standards and
requirements for closure, financial responsibility, manifesting of waste,
record-keeping and reporting, as well as treatment standards for any hazardous
waste intended for land disposal.

         Newpark's primary operations involve E&P waste, which is exempt from
classification as a RCRA-regulated hazardous waste. Many state counterparts to
RCRA also exempt E&P waste from classification as a hazardous waste; however,
extensive state regulatory programs govern the management of such waste. In
addition, in performing other services for its customers, Newpark is subject to
both federal (RCRA) and state solid or hazardous waste management regulations as
contractor to the generator of such waste.

         Proposals have been made in the past to rescind the exemption that
excludes E&P waste from regulation as hazardous waste under RCRA. Repeal or
modification of this exemption by administrative, legislative or judicial
process could require Newpark to change significantly its method of doing
business. There is no assurance that Newpark would have the capital resources
available to do so, or that it would be able to adapt its operations to the
changed regulations.

         Subtitle I of RCRA regulates underground storage tanks in which liquid
petroleum or hazardous substances are stored. States have similar regulations,
many of which are more stringent in some respects than the federal regulations.
The implementing regulations require that each owner or operator of an
underground tank notify a designated state agency of the existence of such
underground tank, specifying the age, size, type, location and use of each such
tank. The regulations also impose design, construction and installation
requirements for new tanks, tank testing and inspection requirements, leak
detection, prevention, reporting and cleanup requirements, as well as tank
closure and removal requirements.

         Newpark has a number of underground storage tanks that are subject to
the requirements of RCRA and applicable state programs. Violators of any of the
federal or state regulations may be subject to enforcement orders or significant
penalties by the EPA or the applicable state agency. 



                                       17
<PAGE>   18

Newpark is not aware of any existing conditions or circumstances that would
cause it to incur liability under RCRA for failure to comply with regulations
applicable to underground storage tanks. However, cleanup costs associated with
releases from these underground storage tanks or costs associated with changes
in environmental laws or regulations could be substantial and could have a
material adverse effect on Newpark's consolidated financial statements.

         CERCLA. The Comprehensive Environmental Response, Compensation and
Liability Act, as amended in 1986 ("CERCLA"), provides for immediate response
and removal actions coordinated by the EPA in response to certain releases of
hazardous substances into the environment and authorizes the government, or
private parties, to respond to the release or threatened release of hazardous
substances. The government may also order persons responsible for the release to
perform any necessary cleanup. Liability extends to the present owners and
operators of waste disposal facilities from which a release occurs, persons who
owned or operated such facilities at the time the hazardous substances were
released, persons who arranged for disposal or treatment of hazardous substances
and waste transporters who selected such facilities for treatment or disposal of
hazardous substances. CERCLA has been interpreted to create strict, joint and
several liabilities for the costs of removal and remediation, other necessary
response costs and damages for injury to natural resources.

         Among other things, CERCLA requires the EPA to establish a National
Priorities List ("NPL") of sites at which hazardous substances have been or are
threatened to be released and that require investigation or cleanup. The NPL is
subject to change, with additional sites being added and remediated sites being
removed from the list. In addition, the states in which Newpark conducts
operations have enacted similar laws and keep similar lists of sites which may
be in need of remediation.

         Although Newpark primarily handles oilfield waste classified as E&P
waste, this waste typically contains constituents designated by the EPA as
hazardous substances under RCRA, despite the current exemption of E&P waste from
hazardous substance classification or another applicable federal statute. Where
Newpark's operations result in the release of hazardous substances, including
releases at sites owned by other entities where Newpark performs its services,
Newpark could incur CERCLA liability. Previously owned businesses also may have
disposed or arranged for disposal of hazardous substances that could result in
the imposition of CERCLA liability on Newpark in the future. In particular,
divisions and subsidiaries previously owned by Newpark were involved in
extensive mining operations at facilities in Utah and Nevada and in waste
generation and management activities in numerous other states. These activities
involved substances that may be classified as RCRA hazardous substances. Any of
those sites or activities potentially could be the subject of future CERCLA
damage claims.

         With the exception of the sites discussed in "Environmental
Proceedings" below, Newpark is not aware of any present claims against it that
are based on CERCLA or comparable state statutes. Nonetheless, the
identification of additional sites at which clean-up action is required could
subject Newpark to liabilities which could have a material adverse effect on
Newpark's consolidated financial statements.

         The Clean Water Act. The Clean Water Act regulates the discharge of
pollutants, including E&P waste, into waters of the United States. The Clean
Water Act establishes a system of standards, permits and enforcement procedures
for the discharge of pollutants from industrial and municipal wastewater
sources. The law sets treatment standards for industries and waste water



                                       18
<PAGE>   19

treatment plants, requires permits for industrial and municipal discharges
directly into waters of the United States and requires pretreatment of
industrial waste water before discharge into municipal systems. The Clean Water
Act gives the EPA the authority to set pretreatment limits for direct and
indirect industrial discharges.

         In addition, the Clean Water Act prohibits certain discharges of oil or
hazardous substances and authorizes the federal government to remove or arrange
for removal of such oil or hazardous substances. Under the Clean Water Act, the
owner or operator of a vessel or facility from which oil or a hazardous
substance is discharged into navigable waters may be liable for penalties, the
costs of cleaning up the discharge and natural resource damage caused by the
spill.

         Newpark treats and discharges wastewaters at certain of its facilities.
These activities are subject to the requirements of the Clean Water Act, and
comparable state statutes, and federal and state enforcement of these
regulations.

         The Clean Water Act also imposes requirements that are applicable to
Newpark's customers and are material to its business. EPA Region 6, which
includes Newpark's market, continues to issue new and amended National Pollutant
Discharge Elimination System ("NPDES") general permits further limiting or
restricting substantially all discharges of produced water from the Oil and Gas
Extraction Point Source Category into waters of the United States. These permits
include:

         1)     Onshore subcategory permits for Texas, Louisiana, Oklahoma and
                New Mexico issued in February, 1991 (56 Fed. Reg. 7698). These
                permits completely prohibit the discharge of drilling fluids,
                drill cuttings, produced water or sand, and various other
                oilfield wastes generated by onshore operations into waters of
                the United States. These permits have the effect of requiring
                that most oilfield wastes follow established state disposal
                programs. These general permits expired on February 25, 1996,
                but pursuant to EPA policy, they are considered to remain in
                effect until reissued by the EPA or superseded by other EPA
                action.

         2)     Permits for produced water and produced sand discharges into
                coastal waters of Louisiana and Texas were issued on January 9,
                1995 (60 Fed. Reg. 2387). Coastal means "waters of the United
                States...located landward of the territorial seas". Under these
                regulations, all such discharges were required to cease by
                January 1, 1997.

         3)     The Outer Continental Shelf ("OSC") permit covering oil and gas
                operations in federal waters in the Gulf (seaward of the
                Louisiana and Texas territorial seas) was reissued in November
                1992 and modified in December 1993. The existing permit was
                combined with a new source permit on August 9, 1996 (61 Fed.
                Reg. 41609). This permit prohibits certain discharges of
                drilling fluids and drill cuttings and includes stricter limits
                for oil and grease concentrations in produced waters to be
                discharged. These limits are based on the Best Available
                Treatment ("BAT") requirements contained in the Oil and Gas
                Offshore Subcategory national guidelines which were published
                March 4, 1993. Additional requirements include toxicity testing
                and bioaccumulation monitoring studies of proposed discharges.
                The general permit for the Western portion of the Gulf of Mexico
                was reissued on November 2, 1998 (63 Fed. Reg. 58722) with very
                few changes. However, on February 3, 1999 (64 Fed. Reg. 5488)
                the EPA issued a proposed rule that will establish effluent
                limitation guidelines for synthetic-based and 



                                       19
<PAGE>   20

                other non-aqueous drilling fluids. One of the proposed
                guidelines is a discharge limit of 10.2 % for drilling fluid
                retained on cuttings. Newpark believes that companies will
                likely require additional solids handling technology in order to
                achieve the proposed limit and that it has access to technology
                capable of meeting this standard. The comment period for this
                proposed rule currently is scheduled to end on May 4, 1999.

         4)     A permit for the territorial seas of Louisiana was issued on
                November 4, 1997 (62 Fed. Reg. 59687). The permit became
                effective on December 4, 1997, except for the water quality
                based limits and certain monitoring requirements that became
                effective May 4, 1998. The permit prohibits the discharge of
                drilling fluids, drill cuttings and produced sand. Produced
                water discharges are limited for oil and grease, toxic metals,
                organics, and chronic toxicity. The territorial seas part of the
                Offshore Subcategory begins at the line of ordinary low water
                along the part of the coast which is in direct contact with the
                open sea, and extends out three nautical miles. This permit
                covers both existing sources and new sources. All discharges in
                state waters must comply with any more stringent requirements
                contained in Louisiana Water Quality Regulations, LAC
                33.IX.7.708. Newpark believes that a similar permit will be
                proposed for the Texas territorial seas in the future.

         The combined effect of all these permits closely approaches a "zero
discharge standard" affecting all waters except those of the OCS. Newpark and
many industry participants believe that these permits and the requirements of
the Clean Water Act may ultimately lead to a total prohibition of overboard
discharge in the Gulf of Mexico.

         The Clean Air Act. The Clean Air Act provides for federal, state and
local regulation of emissions of air pollutants into the atmosphere. Any
modification or construction of a facility with regulated air emissions must be
a permitted or authorized activity. The Clean Air Act provides for
administrative and judicial enforcement against owners and operators of
regulated facilities, including substantial penalties. In 1990, the Clean Air
Act was reauthorized and amended, substantially increasing the scope and
stringency of the Clean Air Act's requirements. The Clean Air Act has very
little impact on Newpark's operations.

         Oil Pollution Act of 1990. The Oil Pollution Act of 1990 contains
liability provisions for cleanup costs, natural resource damages and property
damages resulting from discharges of oil into navigable waters, as well as
substantial penalty provisions. The OPA also requires double hulls on all new
oil tankers and barges operating in waters subject to the jurisdiction of the
United States. All marine vessels operated by Newpark already meet this
requirement.

         State Regulation. In 1986, the Louisiana Department of Natural
Resources ("DNR") promulgated Order 29-B. Order 29-B contains extensive rules
governing pit closure and the generation, treatment, storage, transportation and
disposal of E&P waste. Under Order 29-B, onsite disposal of E&P waste is limited
and is subject to stringent guidelines. If these guidelines cannot be met, E&P
waste must be transported and disposed of offsite in accordance with the
provisions of Order 29-B. Moreover, under Order 29-B, most, if not all, active
waste pits must be closed or modified to meet regulatory standards; those pits
that continue to be allowed may be used only for a limited time. A material
number of these pits may contain concentrations of radium that are sufficient to
require the waste material to be categorized as NORM.



                                       20
<PAGE>   21

         The DNR issued three emergency rules for oilfield waste testing during
1998. The rules call for comprehensive and systematic testing of oilfield waste
disposed at commercial facilities throughout the State of Louisiana. All E&P
waste generated within or without Louisiana, including offshore Louisiana (state
and federal waters), that is to be transported to a commercial facility in the
State of Louisiana must be sampled at the point of generation in accordance with
the emergency rule. Newpark understands that the DNR intends to use the
collected data to revise Statewide Order 29-B, possibly as early as the summer
of 1999. The three rules were effective as of May 1, August 29 and October 1,
1998, and each rule, by law, remained effective for a period of only 120 days.
The DNR has continued the requirement for oilfield waste testing in a fourth
emergency rule that became effective as of January 29, 1999.

         Rule 8 of the Texas Railroad Commission also contains detailed
requirements for the management and disposal of E&P waste and Rule 94 governs
the management and disposal of NORM. In addition, Rule 91 regulates the cleanup
of spills of crude oil from oil and gas exploration and production activities,
including transportation by pipeline. In general, contaminated soils must be
remediated to total petroleum hydrocarbons content of less than 1%. The State of
Texas also has established an Oilfield Cleanup Fund to be administered by the
Texas Railroad Commission to plug abandoned wells if the Commission deems it
necessary to prevent pollution, and to control or clean up certain oil and gas
wastes that cause or are likely to cause pollution of surface or subsurface
water. Other states (New Mexico, Mississippi, Arkansas) where the Company
operates have similar regulations. Oklahoma is presently in the process of
drafting NORM oil and gas regulations. Newpark recently received the first
specific license to conduct NORM remediation in Arkansas.

         Many states maintain licensing and permitting procedures for the
construction and operation of facilities that emit pollutants into the air. In
Texas, the Texas Natural Resource Conservation Commission (the "TNRCC") requires
companies that emit pollutants into the air to apply for an air permit or to
satisfy the conditions for an exemption. Newpark has obtained certain air
permits and believes that it is exempt from obtaining other air permits at its
Texas facilities, including its Port Arthur, Texas, E&P waste facility. Newpark
met with the TNRCC and filed for an air permit exemption for its Port Arthur
facility in the fall of 1991, which exemption was granted by the TNRCC. A
subsequent renewal letter was filed and granted in 1995. Based upon
communications with the TNRCC, Newpark expects that its operations at the Port
Arthur facility will continue to remain exempt from air permitting requirements.
However, should it not remain exempt, Newpark believes that compliance with the
permitting requirements of the TNRCC would not have a material adverse effect on
the consolidated financial statements of Newpark.

         Other Environmental Laws. Newpark is subject to the Occupation Safety
and Health Act that imposes requirements for employee safety and health and
applicable state provisions adopting worker health and safety requirements.
Moreover, it is possible that other developments, such as increasingly stricter
environmental, safety and health laws, and regulations and enforcement policies
thereunder, could result in substantial additional regulation of Newpark and
could subject to further scrutiny Newpark's handling, manufacture, use or
disposal of substances or pollutants. Newpark cannot predict the extent to which
its operations may be affected by future enforcement policies as applied to
existing laws or by the enactment of new statutes and regulations.



                                       21
<PAGE>   22

RISK MANAGEMENT

         Newpark's business exposes it to substantial risks. For example,
Newpark's environmental services routinely involve the handling, storage and
disposal of nonhazardous regulated materials and waste, and in some cases,
handling of hazardous regulated materials and waste for its customers which are
generators of such waste. Newpark could be held liable for improper cleanup and
disposal, which liability could be based upon statute, negligence, strict
liability, contract or otherwise. As is common in the oil and gas industry,
Newpark often is required to indemnify its customers or other third-parties
against certain risks related to the services performed by Newpark, including
damages stemming from environmental contamination.

         Newpark has implemented various procedures designed to ensure
compliance with applicable regulations and reduce the risk of damage or loss.
These include specified handling procedures and guidelines for regulated waste,
ongoing training and monitoring of employees and maintenance of insurance
coverage.

         Newpark carries a broad range of insurance coverages that management
considers adequate for the protection of its assets and operations. This
coverage includes general liability, comprehensive property damage, workers'
compensation and other coverage customary in its industries; however, this
insurance is subject to coverage limits and certain policies exclude coverage
for damages resulting from environmental contamination. Newpark could be
materially adversely affected by a claim that is not covered or only partially
covered by insurance. There is no assurance that insurance will continue to be
available to Newpark, that the possible types of liabilities that may be
incurred by Newpark will be covered by its insurance, that Newpark's insurance
carriers will meet their obligations or that the dollar amount of such
liabilities will not exceed Newpark's policy limits.


ITEM 2.     PROPERTIES

         Newpark's corporate offices in Metairie, Louisiana, consisting of
approximately 7,000 square feet, are occupied at an annual rental of
approximately $138,000 under a lease expiring in December 2002.

         Newpark owns an office building in Lafayette, Louisiana, consisting of
approximately 35,000 square feet, to house the administrative offices of its E&P
waste disposal and mat and integrated services segments.

         The Company leases a total of approximately 39,000 square feet of
office space in Houston, Texas, to house the administrative offices of its
fluids sales and engineering segment. These various leases have an aggregate
annual rent of $367,000 and expire at various terms through October 2000.

         Newpark's Port Arthur, Texas, E&P waste facility, which is used in its
E&P waste disposal segment, is subject to annual rentals aggregating
approximately $556,000 under three separate leases. A total of six acres are
under lease with various expiration dates through September 2002, all with
extended options to renew.



                                       22
<PAGE>   23

         Newpark owns two injection disposal sites, which are used in its E&P
waste disposal segment, in Jefferson County, Texas, one on 50 acres of land and
the other on 400 acres. Eight wells are currently operational at these sites. In
January 1997, Newpark completed the purchase of 120 acres located adjacent to
one of the disposal sites. Newpark plans to use this property as an industrial
waste injection disposal facility. Newpark also has acquired an additional
injection facility, which includes two active injection wells on 37 acres of
land, adjacent to its Big Hill, Texas facility.

         In October 1997, Newpark acquired land and facilities in Andrews, Big
Springs, Plains and Fort Stockton, Texas at which brine is extracted and sold
and E&P waste is disposed of in the salt domes or caverns created by the
extraction process. A total of 125 acres of land was acquired in this
transaction which is used in its E&P waste disposal segment

         Newpark maintains a fleet of 36 double-skinned barges, which are used
in its E&P waste disposal segment, of which 6 are owned by the Company, and 30
are under lease with terms from five to ten years. The barges are used to
transport waste to processing stations and are certified for this purpose by the
U. S. Coast Guard. Annual rentals under the barge leases totaled approximately
$2.4 million during 1998.

         The Company operates two specialty product grinding facilities used in
its fluids sales and engineering segment. One is located on 6.6 acres of leased
land in Channelview, Texas, with an annual rental rate of $12,000, and the other
is located on 13.7 acres of leased land in New Iberia, Louisiana, with an annual
rental rate of $75,000.

         In the Company's E&P waste disposal segment, the Company uses nine
leased facilities located along the Gulf Coast at an annual aggregate rental of
$834,000. In the Company's fluids sales and engineering segment, the Company
serves customers from five leased bases located along the Gulf Coast at an
annual aggregate rental rate of $434,000.

         Newpark owns 80 acres occupied as a sawmill facility near Batson,
Texas, which is used in the mat and integrated services segment.

         Due to growth in certain of Newpark's market areas, the Company has
undertaken efforts to expand the capacity of a number of its facilities. The
Company is currently constructing a new facility for its proposed industrial
disposal facility. In addition, the Company is working on plans for a new leased
offshore base, which will replace several of its current bases used in the E&P
waste disposal and fluids sales and engineering segments. The Company has leased
approximately 104,000 square feet of space in a new office building in Houston,
which is under construction. This space will be used to relocate all of the
Company's operations located in the Houston area.

ITEM 3.  LEGAL PROCEEDINGS

       Newpark and its subsidiaries are involved in litigation and other claims
or assessments on matters arising in the normal course of business. In the
opinion of management, any recovery or liability in these matters should not
have a material effect on Newpark's consolidated financial statements.



                                       23
<PAGE>   24

ENVIRONMENTAL PROCEEDINGS

         In the ordinary course of conducting business, Newpark becomes involved
in judicial and administrative proceedings involving governmental authorities at
the federal, state and local levels, as well as private party actions. Pending
proceedings that allege liability related to environmental matters are described
below. Newpark believes that none of these matters involves material exposure.
There is no assurance, however, that such exposure does not exist or will not
arise in other matters relating to Newpark's past or present operations.

         Newpark continues to be involved in the voluntary cleanup associated
with the DSI sites in southern Mississippi. This includes three facilities known
as Clay Point, Lee Street and Woolmarket. The Mississippi Department of
Environmental Quality is overseeing the cleanup. The DSI Technical Group that
represents the potentially responsible parties, including Newpark, has awarded a
contract to Newpark to do the remaining remediation work at the three sites.
This cleanup should be completed in 1999 except for some continuing ground water
monitoring.

         Newpark has been identified as one of 600 contributors of material to
the MAR Services facility, a state voluntary cleanup site located in Louisiana.
Because Newpark delivered only processed solids meeting the requirements of
Louisiana Statewide Executive Order 29-B to the site, Newpark does not believe
it has material financial liability for the site cleanup cost. The Louisiana
Department of Natural Resources ("DNR") is overseeing voluntary cleanup at the
site.

         Recourse against its insurers under general liability insurance
policies for reimbursement of cost and expense in the foregoing actions is
uncertain as a result of conflicting court decisions in similar cases. In
addition, certain insurance policies under which coverage may be afforded
contain self-insurance levels that may exceed Newpark's ultimate liability.

         Newpark believes that any liability incurred in the foregoing matters
will not have a material adverse effect on Newpark's consolidated financial
statements.

ITEM 4.     SUBMISSION OF MATTERS TO A VOTE OF SHAREHOLDERS

         None



                                       24
<PAGE>   25


PART II

ITEM 5.       MARKET FOR THE REGISTRANT'S COMMON EQUITY AND RELATED STOCKHOLDER
              MATTERS

         Newpark's common stock is traded on the New York Stock Exchange under
the symbol "NR".

         The following table sets forth the range of the high and low sales
prices for the periods indicated.


<TABLE>
<CAPTION>
         Period                                                                 High              Low
         ------                                                                 ----              ---
<S>                                                                        <C>                <C>      
1997

        1st Quarter                                                        $    12.375        $   9.188
        2nd Quarter                                                        $    16.875        $   9.875
        3rd Quarter                                                        $    20.000        $  14.250
        4th Quarter                                                        $    22.500        $  14.750

1998

        1st Quarter                                                        $    20.313        $  12.000
        2nd Quarter                                                        $    25.375        $   9.750
        3rd Quarter                                                        $    12.875        $   5.500
        4th Quarter                                                        $    10.000        $   5.313
</TABLE>

         At December 31, 1998, the Company had 3,010 stockholders of record.

         Newpark does not intend to pay any cash dividends in the foreseeable
future, and the Board of Directors currently intends to retain earnings for use
in Newpark's business. In addition, Newpark's credit facility and the Indenture
relating to its outstanding Senior Subordinated Notes contain covenants which
significantly limit the payment of dividends on the common stock.

                                      25


<PAGE>   26



ITEM 6.       SELECTED FINANCIAL DATA

         The selected consolidated historical financial data presented below
for the five years ended December 31, 1998, are derived from the audited
consolidated financial statements of Newpark and have been restated to reflect:
(i) Several acquisitions made during 1997 and 1998 which were accounted for as
poolings of interests; (ii) a two-for-one split of Newpark's common stock
effective May 1997; and (iii) a 100% stock dividend issued by Newpark in
November 1997. The following data should be read in conjunction with the
Consolidated Financial Statements of Newpark and the Notes thereto included
elsewhere herein and "Management's Discussion and Analysis of Financial
Condition and Results of Operations".

<TABLE>
<CAPTION>
                                                                                      YEARS ENDED DECEMBER 31,                     
                                                                    -------------------------------------------------------------
                                                                     1998(1)      1997(1)      1996(2)       1995         1994
                                                                    ---------    ---------    ---------    ---------    ---------
                                                                               (In  thousands, except per share data)

<S>                                                                 <C>          <C>          <C>          <C>          <C>      
CONSOLIDATED STATEMENTS OF OPERATIONS:
Revenues                                                            $ 256,808    $ 233,245    $ 153,679    $ 123,676    $ 104,348
Cost of services provided                                             176,551      138,392      100,627       84,328       74,275
Operating costs                                                        68,243       27,726       15,141       14,887       14,255
General and administrative expenses                                     4,305        3,185        2,920        2,658        3,231
Provision for uncollectible accounts                                    9,180           --           --           --           --
Impairment of long-lived assets                                        52,266           --           --           --           --
Arbitration settlement                                                 27,463           --           --           --           --
Equity in net loss of unconsolidated affiliates                         1,293           --           --           --           --
Restructure expense                                                        --           --        2,432           --           --
                                                                    ---------    ---------    ---------    ---------    ---------
Operating income (loss)                                               (82,493)      63,942       32,559       21,803       12,587
Interest income                                                        (1,488)        (310)        (273)        (245)         (80)
Interest expense                                                       11,554        4,265        3,996        3,883        2,724
Other                                                                      --           --           --          183           --
                                                                    ---------    ---------    ---------    ---------    ---------
Income (loss) before provision for income taxes                       (92,559)      59,987       28,836       17,982        9,943
Provision (benefit) for income taxes                                  (30,270)      22,246        9,884        5,102         (252)
                                                                    ---------    ---------    ---------    ---------    ---------
Income (loss) before cumulative effect of
  accounting change                                                   (62,289)      37,741       18,952       12,880       10,195
Cumulative effect of accounting change
  (net of income tax effect)                                           (1,326)          --           --           --           --
                                                                    ---------    ---------    ---------    ---------    ---------

Net income (loss)                                                   $ (63,615)   $  37,741    $  18,952    $  12,880    $  10,195
                                                                    =========    =========    =========    =========    =========

Net income (loss) per common and common equivalent shares:
      Basic                                                         $   (0.95)   $    0.59    $    0.36    $    0.28    $    0.22
                                                                    =========    =========    =========    =========    =========
      Diluted                                                       $   (0.95)   $    0.58    $    0.34    $    0.27    $    0.22
                                                                    =========    =========    =========    =========    =========

Weighted average common and common equivalent shares outstanding:
      Basic                                                            67,058       64,158       53,197       46,640       46,056
                                                                    =========    =========    =========    =========    =========
      Diluted                                                          67,058       65,630       54,956       47,706       46,880
                                                                    =========    =========    =========    =========    =========
</TABLE>

                                      26

<PAGE>   27


<TABLE>
<CAPTION>
                                           DECEMBER 31,  
                       ----------------------------------------------------
(IN THOUSANDS)          1998(1)    1997(1)    1996(2)     1995       1994   
                       --------   --------   --------   --------   --------
CONSOLIDATED BALANCE SHEET DATA:

<S>                    <C>        <C>        <C>        <C>        <C>     
Working capital        $ 75,937   $ 88,882   $ 28,301   $ 31,832   $ 12,876
Total assets            504,479    451,623    299,071    160,755    120,214
Short-term debt           1,267      1,774     13,831      8,515     10,541
Long-term debt          208,057    127,996     35,677     47,395     29,738
Stockholders' equity    242,497    269,985    206,362     80,227     65,540
</TABLE>


(1) 1998 and 1997 include the effects of eight acquisitions and seven
    acquisitions, respectively, primarily in the fluids sales and engineering
    segment, accounted for by the purchase method of accounting (See Note B to
    Consolidated Financial Statements).

(2) 1996 includes the effects of the purchase of substantially all of the
    non-landfarms assets and certain leases from Campbell Wells, Ltd. (See Note
    B to Consolidated Financial Statements).

                                      27
<PAGE>   28


ITEM 7.  MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS
         OF OPERATIONS

         The following discussion of the Company's financial condition, results
of operations, liquidity and capital resources should be read in conjunction
with the "Consolidated Financial Statements" and the "Notes to Consolidated
Financial Statements" included elsewhere in this report.

RECENT DEVELOPMENTS

         Continued weakness in oil prices has produced a continuing decline in
market activity as measured by the rig count in the markets which Newpark
serves. In addition, Newpark has experienced a geographical shift of activity
away from the Austin Chauk area of Western Louisiana and Eastern Texas, as a
result of weak oil prices and disappointing drilling results in this area.

         The table below shows the average crude oil and natural gas prices for
1998, 1997 and 1996:

<TABLE>
<CAPTION>
                              1998      1997      1996
                             ------    ------    ------
<S>                          <C>       <C>       <C>
West Texas Intermediate
        Crude ($/bbl)         14.41     21.83     20.51
U.S. Spot Natural
         Gas ($/mcf)           2.01      2.47      2.21
</TABLE>

During the first quarter of 1999 oil prices dropped to approximately $12.

         The table below, based on the Baker-Hughes Rotary Rig Count, indicates
the recent downward trend in Newpark's primary market areas, including (i) South
Louisiana Land; (ii) Texas Railroad Commission Districts 2 and 3; (iii)
Louisiana and Texas Inland Waters; and (iv) Offshore Gulf of Mexico:

<TABLE>
<CAPTION>
                           1998   1997   1996   1Q98   2Q98   3Q98   4Q98
                           ----   ----   ----   ----   ----   ----   ----
<S>                        <C>    <C>    <C>    <C>    <C>    <C>    <C>
U.S. Rig Count              831    943    779    968    864    796    690
Newpark's market            243    252    208    283    266    219    204
Newpark's market to total  29.2%  26.7%  26.7%  29.2%  30.8%  27.5%  29.6%
</TABLE>

         As of the week ended March 19, 1999, the U.S. rig count was 526, with
182 rigs, or 34.6%, within Newpark's primary market. This marks the lowest rig
count ever recorded in the history of the indicator. Rig counts in Newpark's
primary market are down from a peak of 297, which was achieved during the week
ended February 20, 1998.

- -----------
Source:  Baker Hughes Incorporated

         The recent decline in rig activity has affected the Company's revenue
and is expected to continue to affect future period revenues until oil prices
recover.

         The percentage of rigs in Newpark's primary market, as compared to the
total domestic rig count, reflects the importance of natural gas drilling
relative to oil in that market. Natural gas production accounts for the majority
of activity in the Gulf Coast


                                       28
<PAGE>   29


region. However, low oil prices reduce the cash flow available for all
exploration and production activity. Lower oil prices, beginning in 1998, slowed
drilling in markets more oriented toward oil, such as the Austin Chalk region,
West Texas and areas which produce primarily heavy oil, such as Canada and
Venezuela.

         During this period of market and geographic shifts, Newpark has
continued to work toward bringing proprietary innovative solutions to the
markets which it serves. These innovations primarily include:

o  Composite mats
o  Proprietary environmentally friendly drilling fluids (DeepDrill(TM))
o  Drilling fluids processing and recycling
o  Minimization Management
o  Industrial non-hazardous waste processing and disposal

         As a result of these innovations, which were partially or fully
implemented in the third and fourth quarter of 1998, Newpark has displaced, and
will continue to displace some of its current operations and operating assets.
The most significant displacement is associated with the introduction of
Newpark's composite mat. Newpark expects to convert a significant portion of the
mats used in its domestic rental fleet from wooden mats to the new composite
mats. While the Company will continue to use wooden mats in its domestic fleet,
it has decided to dispose of many of its older wooden mats instead of repairing
them. During the third and fourth quarter of 1998 the Company removed these
older mats from service and had destroyed the majority of them by the end of the
year. The Company will complete this disposal process in the first quarter of
1999 but does not intend to take any additional mats out of service at this
time. The impairment of long-lived assets of $52.3 million recorded during 1998
includes $43.0 million relating to the write-off of these older wooden mats. The
remaining $9.3 million in impairments relates to assets which have been impaired
in value or abandoned due to the downturn in market conditions discussed above.

         In the third quarter of 1998, the Company also settled its arbitration
related to the NOW Disposal Agreement with U.S. Liquids, Inc. In the fourth
quarter of 1998, final modifications were made to the agreement. The total
settlement was $30 million, of which $6 million was paid in 1998, and $11
million, $9 million, and $4 million will be paid in 1999, 2000 and 2001,
respectively. Total pretax charges associated with the settlement of $27.5
million were recorded during 1998 (of which $9.1 million was recorded in the
third quarter and $18.4 million was recorded in the fourth quarter). This $27.5
million includes $6.1 million of reduction in the value of the non-compete with
U. S. Liquids with the remaining $21.4 million representing the portion of the
settlement associated with the termination feature. Future charges of $8.8
million ($7.6 million in the form of operating expense and $1.2 million in the
form of imputed interest expense) will be recorded during 1999, 2000 and the
first half of 2001, respectively, in relation to the settlement.

         Due to weakness in the commodity prices of oil and gas, and the
resulting liquidity problems encountered by a number of customers for whom the
Company has performed services, the Company increased its allowance for doubtful
accounts by $9.2 million in 1998


                                       29
<PAGE>   30


(of which $5.2 million was recorded in the fourth quarter and $4 million was
recorded in the third quarter). The majority of the provision relates to three
specific customers.

         The Company also recorded a $2.1 million charge ($1.3 million after
tax) in the third quarter reflecting the cumulative effect of a change in
accounting for certain start-up costs, resulting from the early adoption of
Statement of Position 98-5, "Reporting on the Costs of Start-up Activities."
Start-up costs since the date of adoption (July 1, 1998) have not been
significant.

         During the third quarter of 1998, two tropical storms and two
hurricanes significantly disrupted drilling activities in the Gulf of Mexico and
surrounding areas. When severe weather enters the Gulf, drilling operations are
stopped and rigs are evacuated. These evacuation proceedings usually take place
several days in advance of the storm. The rigs are then shut down for the
duration of the storm and drilling activities do not resume for several days
following the storm. As a result, operations in the Gulf area were disrupted
during the third quarter for more than 20 days. There were no significant
weather related disruptions of operations in the fourth quarter of 1998.

1998 AND 1997 ACQUISITIONS

         During the year ended December 31, 1998, the Company completed nine
separate acquisitions in the drilling fluids industry and two acquisitions in
the solids control, processing and disposal industry. The consideration paid for
these acquisitions aggregated 3,497,771 shares of Newpark common stock and $22.7
million in cash. Eight transactions were accounted for as purchases. The other
three acquisitions were accounted for as poolings of interests, and accordingly,
prior year financial statements have been restated. These acquisitions provided
the Company entry into the drilling fluids markets in the Canadian provinces of
Alberta and Saskatchewan, the Permian Basin of West Texas and New Mexico, and
the Anadarko Basin in Western Oklahoma. The acquisitions also provided the
Company entry into the onsite fluids processing market, which is a key
additional component of the Company's "Minimization Management" ("MM") strategy.
The Company has no current plans to make additional acquisitions.

         In February 1997, Newpark acquired SBM, a full-service drilling fluids
company, which serves customers in the Louisiana and Texas Gulf Coast, in
exchange for an aggregate of 2,328,000 shares of Newpark common stock. The
acquisition was accounted for as a pooling of interests, with direct acquisition
costs of $316,000 charged to current operations. SBM subsequently changed its
name to Newpark Drilling Fluids, Inc. After the SBM acquisition, Newpark
completed seven additional acquisitions during 1997 in the drilling fluids
industry, in exchange for an aggregate of $9.2 million in cash and 1,371,112
shares of Newpark common stock. The acquisitions involved five drilling fluids
distribution companies, one specialty chemical company and one specialty milling
company. In November, 1997, Newpark also purchased the Gulf Coast operations and
related assets of Anchor Drilling Fluids, Inc.

         To expand its presence and service capabilities in the site preparation
business, Newpark acquired, during 1997, two oilfield site contractors in
exchange for an aggregate of 990,888 shares of Newpark common stock. Newpark
also acquired additional properties


                                       30
<PAGE>   31


and facilities to expand its disposal capacity, including two active injection
wells on 37 acres of land adjacent to Newpark's Big Hill facility, four
facilities in the Permian Basin at which brine is extracted and sold and E&P
waste is disposed in the salt domes or caverns created by the extraction
process, and 120 acres of land adjacent to its Big Hill facility, which Newpark
plans to develop into an industrial non-hazardous waste disposal facility.

RESULTS OF OPERATIONS

         Operating Results for 1997 and 1996 have been restated to give effect
to a series of pooling of interests transactions, which took place during 1997
and 1998.

<TABLE>
<CAPTION>
                                                   Years Ended December 31,
                                                    (Dollars in thousands)

                                        1998                1997                  1996 
                                 -----------------    -----------------    -----------------
<S>                              <C>        <C>       <C>        <C>       <C>        <C>  
Revenues by segment:
    E&P waste disposal           $ 57,588     22.4%   $ 62,301     26.7%   $ 44,905     29.2%
    Fluids sales & engineering    103,053     40.1      69,227     29.7      28,201     18.3
    Mat & integrated services      96,167     37.5     101,717     43.6      79,213     51.5
    Other                               0      0.0           0      0.0       1,360      1.0
                                 --------   ------    --------   ------    --------   ------
         Total                   $256,808    100.0%   $233,245    100.0%   $153,679    100.0%
                                 ========   ======    ========   ======    ========   ======
</TABLE>



<TABLE>
<CAPTION>

                                          Years Ended December 31,
                                           (Dollars in thousands)

                                        1998        1997       1996
                                      --------    --------   --------
<S>                                   <C>         <C>        <C>     
Operating income (loss) by segment:
    E&P waste disposal                $ 16,633    $ 26,463   $ 14,245
    Fluids sales & engineering         (13,961)     12,534        811
    Mat & integrated services            9,342      28,130     21,933
    Other                                    0           0        922
                                      --------    --------   --------
         Total                        $ 12,014    $ 67,127   $ 37,911
                                      ========    ========   ========
</TABLE>

Figures shown above are net of intersegment transfers.

YEAR ENDED DECEMBER 31, 1998 COMPARED TO YEAR ENDED DECEMBER 31, 1997

Revenues

         Total revenues increased to $256.8 million in 1998, from $233.2 million
in 1997, an increase of $23.6 million, or 10.1%. The components of the increase
in revenues were a $33.8 million increase in drilling fluids sales and
engineering, partially offset by a $4.7 million decrease in waste disposal and a
$5.5 million decrease in mat and integrated services.

         Drilling fluids sales increased $33.8 million, or 48.9%, as a result of
a series of acquisitions made during 1997 and 1998, and the expansion of the
businesses acquired. The decline in drilling activity has reduced the size of
the market for drilling fluids; however, the Company has increased its sales of
drilling fluids by obtaining a larger share of the market. The growth in sales
volume during 1998 masked the softness in commodity prices experienced
throughout the drilling fluids industry in the latter part of 1998,


                                       31
<PAGE>   32


especially during the fourth quarter, which continued into the first quarter of
1999. In particular the selling price received in the market place for barite,
which is a key component in most drilling fluids, has declined significantly
during the fourth quarter of 1998 and first quarter of 1999 due to competitive
pressures.

         E&P waste accounted for 95% of disposal revenue, or $54.9 million in
1998, and 90%, or $56.1 million in 1997. During 1998, the volume of E&P waste
declined slightly while the average price per barrel increased by approximately
10%. In the first quarter of 1998, E&P waste volume increased due to increased
regulations, which banned waste discharges in the state territorial waters of
the Gulf of Mexico. This increase was offset by declines in drilling activity,
particularly in the territorial waters, beginning in the second quarter of 1998.
In the latter half of 1998, volume declined due to lower drilling activity and
as a result of the Company's waste minimization efforts to reduce the volume of
wash water created at transfer facilities in the vessel and container cleaning
process. In addition, volumes were lower due to the effect of unusual weather
conditions encountered in the third quarter of 1998.

         The decrease of $5.5 million in mat and integrated services revenue
reflects the general decline in drilling activity, as well as the effect of
unusual weather conditions on drilling activity in the area surrounding the Gulf
of Mexico. Mat rental revenues include revenues earned on the initial mat
installation, which typically includes the first 60 days of rental, and
re-rentals earned beyond the initial installation term. The price received for
mat rentals and re-rentals has declined significantly during the latter part of
1998 and the first quarter of 1999. This decline in pricing was caused by
competitive pressure and low activity relative to industry capacity. The Company
as well as many of its competitors had increased their inventories of mats
during 1997 and the first part of 1998 in response to increasing industry
activity.

Operating Income (Loss)

         The Company reported an operating loss of ($92.6) million in 1998 as
compared to operating income of $60.0 million in 1997. The primary factors
contributing to the operating loss in 1998 were charges for the provision of
uncollectible accounts, impairment of long-lived assets, and the arbitration
settlement noted above. The total of these charges in 1998 were $88.9 million.

         Segment operating income declined to $12.0 million in 1998, from $67.1
million in 1997, a decrease of $55.1 million, or 82%. The components of the
decrease were a $9.8 million decrease in E&P waste disposal operating income, a
$26.5 million decrease in fluids sales and engineering operating income and a
$18.8 million decrease in mat and integrated services operating income. The $9.8
million decrease in waste disposal operating income can be attributed to the
$4.7 million decrease in revenues discussed above coupled with a decline in
operating margins. Since completing the 1996 acquisition of US Liquids offshore
waste business, the Company has expanded its overall capacity to handle volumes
of waste through increased barge capacity and transfer station capacity. While
this capacity was necessary for the increase in business experienced by the
Company in 1997 as compared to 1996, this capacity added significantly to the
cost of the waste disposal operations. When the sharp decline hit in 1998 the
Company reacted to the situation by disposing of barges,


                                       32
<PAGE>   33


closing facilities and reducing staffing levels. The Company was not able to
reduce the costs of these operations as fast as the decline in revenues. The
Company has continued to reduce costs in this segment of its business in the
first quarter of 1999.

         While revenues for the fluids sales and engineering segment increased
by $33.8 million in 1998 as compared to 1997, operating income decreased by
$26.5 million. The increase in revenue can be attributed to the rapid growth in
this business segment due to a series of acquisitions, an expansion of
facilities acquired and the establishment of new distribution facilities. In
particular, the Company saw a rapid growth in business in the Austin Chauk
region. In order to service this growing market the Company expanded capacity of
its facilities in this region. With the downturn in oil prices, and
disappointing drilling results in this region, this market fell quickly and
dramatically. The Company has since closed its facilities in the Austin Chauk
area and downsized its operations. This downsizing has included the disposal of
assets, which do not serve its other markets effectively, and the reduction in
staffing levels. The Company has continued to make cost reductions in this
business segment in the first quarter of 1999. The Company also saw profits from
this business segment decline as a result of falling sales prices for many
products used in drilling fluids.

         Operating income in the mat and integrated services segment decreased
$18.8 million in 1998 as compared to 1997. This decline in operating income can
be attributed in part to the $5.5 million decrease in revenues in this segment
along with declining margins and costs associated with the disposal of mats
during the third and fourth quarter of 1998. Mat disposal operations during 1998
were conducted for the most part with internal labor and assets. There will be
some continuing cost for mat disposal in the first and second quarter of 1999
but to a lesser degree than in 1998. This business segment has significantly cut
costs in response to the decline in demand for its services by reducing staffing
levels, closing facilities and disposing of excess assets. Further cost cuts
were implemented in this segment in the first quarter of 1999.

General and Administrative Expenses

         General and administrative expenses during 1998 were $4.3 million as
compared to $3.2 million in 1997. The increase is attributable to a growth in
revenues, recent acquisitions, and growth in new product offerings. The Company
has undertaken steps to reduce its general and administrative costs in the
latter part of 1998 and in the first quarter of 1999.

Provision for Uncollectible Accounts

         The Company recorded $9.2 million in bad debt reserves during 1998 due
to the risk of customer financial weakness resulting from continued downward
pressure on oil prices. This downturn in oil prices has caused a strain on
customers' cash flow, which has in turn affected the collectibility of certain
receivables from customers. The Company has identified three specific customer
balances where the risk of such financial concern merits the majority of this
additional reserve.


                                       33
<PAGE>   34


Impairment of Long Lived Assets

         The Company recorded impairments on certain of its capital assets
during 1998 in the amount of $52.3 million. These impairments were caused
primarily by two factors which arose during the period. The first factor was the
introduction of new technology by the Company in several areas, which rendered
obsolete certain assets in service. The second factor was a change in market
conditions driven by a reduction in oil prices. These market conditions caused
certain assets of the Company (primarily those located in the Austin Chauk
region) to become significantly or completely impaired in value. The impairment
of long-lived assets includes $43.0 million for the write-down of the Company's
wooden board road mat fleet used in its mat and integrated services segment. The
Company is in the process of converting a significant portion of its domestic
rental fleet to a new composite mat. Accordingly, the Company has disposed of
its older mats which would normally have required substantial maintenance cost
to keep in service. The Company also incurred an impairment of $1.3 million in
its mat and integrated services segment on a machine used in remediation
operations that has been rendered obsolete by other new equipment being
introduced by the Company as well as other equipment.

         Included in the impairment was $4.7 million of write-downs for assets
used in the Company's fluids sales and engineering segment. These assets have
either been abandoned (primarily warehouses and mixing plants located in the
Austin Chauk region) due to market conditions or were written down to their
disposal value due to excess capacity created by a downturn in the Company's
operations.

         Also included in the impairment was $1.3 million to write-down to their
disposal value barges which were previously used in the Company's E&P waste
disposal segment and are no longer required due to decreased volumes of waste
being handled. The Company also incurred a write-down of $1.9 million in this
segment relating to the abandonment of additional disposal sites being
constructed for future use. Due to the downturn in the oilfield waste market
created by reduced oilfield drilling, the Company will not pursue bringing this
additional capacity on-line.

Arbitration Settlement

         In the third quarter, the Company settled its arbitration related to
the NOW Disposal Agreement with U.S. Liquids, Inc. In the fourth quarter, final
modifications were made to the agreement. Pretax charges associated with the
settlement of $27.5 million were recorded during 1998. This $27.5 million
includes a $6.1 million reduction in the value of the non-compete with U. S.
Liquids, with the remaining $21.4 million representing the portion of the
settlement associated with the termination feature.

Equity Earnings of Unconsolidated Affiliate

         Included in the loss from unconsolidated affiliates are charges of $1.3
million that include recognition of the Company's share of joint venture losses
related to the start-up period of the composite mat manufacturing facility.


                                       34
<PAGE>   35


Interest Income and Interest Expense

         Net interest expense was $10.1 million in 1998 as compared to $4.0 in
1997. The increase in net interest cost is due to an increase of $81.0 million
in average outstanding borrowings and an increase in average effective interest
rates from 6.07% in 1997 to 8.32% in 1998. The increase in average outstanding
borrowings and average effective interest rates is due to the issuance of $125
million of ten year, 8-5/8% senior subordinated notes in December 1997 and
additional borrowings under the Credit Facility. The proceeds from the senior
subordinated notes and the Credit Facility were used to fund acquisitions,
capital expenditures and working capital for operations growth.

Provision for Income Taxes

         For the 1998 and 1997 periods, Newpark recorded income tax (benefits)
provisions of ($30.3) million and $22.2 million, equal to (32.8)% and 37.1% of
pre-tax (loss) income, respectively.

Cumulative Effect of Accounting Change

         On July 1, 1998 Newpark elected early adoption of Statement of Position
98-5 "Reporting on Costs of Start-up Activities." Newpark was required to adopt
this accounting pronouncement beginning January 1, 1999. The cumulative effect
of this change in accounting, net of income taxes, was $1.3 million. Start-up
costs since the date of adoption have not been significant.


YEAR ENDED DECEMBER 31, 1997 COMPARED TO YEAR ENDED DECEMBER 31, 1996

Revenues

         Total revenues increased to $233.2 million in 1997, from $153.7 million
in 1996, an increase of $79.5 million, or 51.7%. Drilling fluids sales and
engineering revenue increased $41.0 million as a result of a series of purchase
acquisitions made during 1997 in the drilling fluids market, the expansion of
the businesses acquired through increased inventories and facilities to service
new and expanded markets and an increase in drilling activity. The increase in
waste disposal revenues of $17.4 million can be primarily ascribed to the full
year effect of acquisition of a competitor's marine-related collection
operations in August 1996, increases in the domestic market rig count and
increased pricing. The volume of waste received was also impacted by an increase
in environmental regulations. Effective December 4, 1997, discharges of waste
from drilling operations in the state territorial waters of the Gulf of Mexico
were prohibited. These regulations immediately began to impact volumes of waste
handled by the Company. E&P waste revenues for 1997 increased to $56.1 million,
compared to $36.2 million in 1996. The volume of E&P waste received increased to
5.6 million barrels, from 4.0 million barrels. The increase in volume accounted
for approximately 80% of the increase in E&P waste revenues, while price
increases accounted for approximately 20% of the increase in revenues. NORM
revenue was $6.2 million in 1997, compared to $8.7 million in 1996, due to
decreased site remediation activity. The decrease in activity in the NORM market
was partially offset by


                                       35
<PAGE>   36


higher average pricing on waste received in 1997 versus 1996. The increase of
$22.5 million in mat and integrated services revenue reflects improvement in the
domestic market rig count and increased pricing for Newpark's mat inventory,
coupled with the completion of a purchase acquisition in 1997. Mat rental
revenues include revenues earned on the initial mat installation, which
typically includes the first 60 days of rental. If the mats are rented beyond
the initial period, a rerental charge is earned. In 1997, the initial rentals
accounted for approximately 60% of mat service revenues, with rerentals
accounting for 40%. In 1996, initial rentals accounted for 52% of the total mat
service revenues and rerentals accounted for 48%. In terms of pricing and volume
impact on total mat service revenues, pricing accounted for approximately 60% of
the increase and volume accounted for approximately 40%.

Operating Income

         Operating income increased to $63.9 million in 1997, an increase of
$31.4 million, or 77%. The primary components of the increase were a $12.2
million increase in E&P waste disposal operating income, an $11.7 million
increase in fluids sales and engineering operating income, and a $6.2 million
increase in mat and integrated services operating income. These increases are
primarily related to the revenue increases for the segments and a greater
leveraging of operations.

General and Administrative Expenses

         General and administrative expenses increased by $265,000 from 1996 to
1997, but decreased as a percentage of revenues to 1.4% in 1997 from 1.9% in
1996.

Provision for Income Taxes

         For the 1997 and 1996 periods, Newpark recorded income tax provisions
of $22.2 million and $9.9 million, equal to 37.1% and 34.3% of pre-tax income,
respectively.

LIQUIDITY AND CAPITAL RESOURCES

         The Company's working capital position decreased by $12.9 million, or
14.6%, during the year ended December 31, 1998, as compared to 1997. Key working
capital data is provided below:

<TABLE>
<CAPTION>
                                            Year Ended December 31,

                                              1998          1997  
                                            --------      --------
<S>                                         <C>           <C>
              Working Capital (000's)       $ 75,937      $ 88,882
              Current Ratio                     2.75          3.56
</TABLE>

         The decrease in working capital is primarily attributable to
acquisitions completed during 1998 for cash, the acquisition of additional long
lived assets and a dramatic downturn in the Company's business in the second
half of 1998 which caused revenues to fall, expenses to rise and resulting
margins from operations to decline.


                                       36
<PAGE>   37


         The Company's long term capitalization as of December 31, 1998, 1997
and 1996 was as follows:

<TABLE>
<CAPTION>
                                                   1998       1997       1996 
                                                 --------   --------   --------
<S>                                              <C>        <C>        <C>     
Long-term debt (including current maturities):
        Credit facility                          $ 80,900   $     --   $ 41,351
        Subordinated debt                         125,000    125,000         --
        Other                                       3,352      4,495      6,179
                                                 --------   --------   --------
        Total long-term debt                      209,252    129,495     47,530

Stockholders' equity                              242,497    269,985    206,362
                                                 --------   --------   --------

        Total capitalization                     $451,749   $399,480   $253,892
                                                 ========   ========   =========
</TABLE>

         For the year ended December 31, 1998, Newpark's working capital needs
were met primarily from operating cash flow, borrowings under the Credit
Facility and excess proceeds from the subordinated debt issue. Total cash
generated from operations of $29.2 million was supplemented by $75.0 million
from financing activities to provide for a total of $119.3 million used in
investing activities.

         Newpark has outstanding a Credit Facility, which provides for a $100.0
million revolving credit facility maturing on June 30, 2001, including up to
$20.0 million in standby letters of credit. At December 31, 1998, $15.6 million
in letters of credit were issued and outstanding under the Credit Facility, and
$80.9 million was outstanding under the revolving facility. Advances under the
credit facility bear interest at either (i) a specified prime rate or (ii) the
LIBOR rate plus a spread which is determined quarterly based on the Credit
Facility. The Credit Facility requires that Newpark maintain certain specified
financial ratios and comply with other usual and customary requirements. One of
the requirements of the Credit Facility is that the Company cannot incur losses
for two consecutive quarters. Due primarily to asset impairments and the
arbitration settlement which were recorded during the third and fourth quarter
of 1998, the Company sustained losses over two quarters. The banks have waived
any defaults as a result of these two loss quarters and amended the Credit
Facility to provide for covenants which are consistent with the Company's
current financial condition and anticipated market outlook. Newpark was in
compliance with all other requirements of the Credit Facility, as amended, at
December 31, 1998. Several of the financial ratios under the credit facility are
at or near their respective limits. Any losses sustained by the Company in
future quarters may cause Newpark to not be in compliance with certain financial
covenants unless waivers can be obtained from the banks. Since December 31, 1998
the Company has paid down approximately $12 million of the outstanding balance
under the credit facility which has provided additional coverages under two of
the financial ratios. The Company has plans to make additional substantial
reductions of the outstanding balance during 1999. There can be no assurance,
however, that the Company will be able to make such additional reductions, or,
if needed, obtain any necessary waivers from the banks.

         For 1999, Newpark anticipates capital expenditures of approximately $30
million, including: (i) $3 million to develop non-hazardous industrial waste
injection well sites, (ii) 


                                       37
<PAGE>   38


$6 million for expansion of drilling fluids operations, including the purchase
of equipment associated with fluids processing and recycling and infrastructure
expansions; (iii) $2 million to complete an enlarged joint operational offshore
facility; (iv) $16 million for the purchase of synthetic mats and additional
hardwood mats; and (v) $3 million for maintenance capital.

         Potential sources of additional funds, if required by the Company,
would include operating leases for equipment purchases and the sale of equity
securities. The Company presently has no commitments beyond its working capital
and bank lines of credit by which it could obtain additional funds for current
operations; however, it regularly evaluates potential borrowing arrangements
which may be utilized to fund future expansion. Newpark believes that its
current sources of capital, coupled with internally generated funds, will be
sufficient to support its working capital, capital expenditure and debt service
requirements for the foreseeable future provided that market conditions
stabilize or improve from current levels. Any further protracted downturn in
market conditions could have an adverse affect on the Company's future available
capital and would likely result in reductions in planned capital expenditures.
Except as described in the preceding paragraph, and in Footnote M to the
Consolidated Financial Statements. Newpark is not aware of any material
expenditures, significant balloon payments or other payments on long term
obligations or any other demands or commitments, including off-balance sheet
items to be incurred within the next 12 months.

         Inflation has not materially impacted the Company's revenues or income.

YEAR 2000

         The Company relies heavily on computers in its internal and external
financial reporting systems. In addition, computers are used extensively
throughout the Company to perform critical operating activities, including the
processing of payroll, accounts receivable and accounts payable and to perform
critical analyses such as well reports for drilling fluids customers and testing
of E&P waste streams received from customers. The Company also makes use of
computers for efficient communications with employees and customers, including
extensive use of e-mail systems and the Internet, and is expected to expand its
use of such technology in the future. Finally, embedded technology such as
microcontrollers are commonly found in equipment used throughout the Company's
operations. The complete failure of these systems could have a material negative
impact on the operations of the Company. In addition, most of the Company's
major suppliers and customers rely heavily on similar computer systems and
failures in such systems could disrupt their operations.

         The Company is substantially complete in assessing and addressing Year
2000 issues in its major computer systems. Most of the Company's major systems
have been updated in the normal course of business or replaced with applications
that are Year 2000 compliant. No system replacements were made or accelerated to
comply with Year 2000 issues, but rather were made to address other operating
issues.

         In addition to substantially addressing Year 2000 issues in its own
critical computer systems, the Company is in the process of contacting its major
customers and vendors to


                                       38
<PAGE>   39


assess their progress in addressing their Year 2000 issues. Included with these
contacts is a request to address embedded technology as it relates to their own
operations and to products supplied to the Company. The Company expects to have
responses from these customers and vendors by the second quarter of 1999. The
Company believes that in making these contacts it can minimize the risks
associated with Year 2000 failures of such vendors and customers. The Company
can give no assurance that the systems of other companies on which the Company's
systems rely will be converted or otherwise addressed on time, or that a failure
to convert by another company would not have a material adverse effect on the
Company.

         While the Company has and will continue to make efforts to address Year
2000 issues, the Company could experience disruptions in its operations as a
result of failures in its own systems and those of its major vendors or
customers. Accordingly, the Company will develop contingency plans by the end of
the second quarter of 1999 to help mitigate the effects of failures, if any.

         To date, the total amount spent on Year 2000 issues has been less than
$100,000 and has not been material to the Company's operations or financial
condition. Based on current assessments, the Company expects to incur less than
$100,000 in additional expenditures to address Year 2000 issues. However, these
estimates are subject to revisions based on future assessments and responses
from vendors and customers.

         Estimates of the costs or consequences of incomplete or untimely
resolution of Year 2000 issues would be speculative. The Company will continue
to assess and address Year 2000 issues and expects to fund such efforts through
operating cash flows.

NEW ACCOUNTING STANDARDS.

         During 1997, the Financial Accounting Standards Board issued Statement
of Financial Accounting Standards No. 130 "Reporting Comprehensive Income"
("SFAS 130") and Statement of Financial Accounting Standards No. 131 :Disclosure
about Segments of an Enterprise and Related Information" ("SFAS 131"). SFAS 130
provides guidance for the presentation and display of comprehesive income. SFAS
131 establishes standards for disclosure of operating segments, products,
services, geographic areas and major customers. The Company has adopted SFAS 130
and has included the required Statements of Comprehensive Income within its
consolidated financial statements with the same prominence as its other
consolidated financial statements. In addition, the Company has considered the
implications of SFAS 131 and has included the required disclosure in Note P.

         In February 1998, the Financial Accounting Standards Board issued
Statement of Financial Accounting Standards No. 132, "Employers' Disclosure
about Pensions and Other Postretirement Benefits" ("SFAS 132"). SFAS 132 revises
the standards for disclosure of pension and other postretirement benefit plans
by standardizing the disclosure requirements, requiring additional information
on changes in the benefit obligations and fair values of plan assets. and
eliminating certain disclosure requirements no longer considered to be useful.
The new disclosure requirements are designed to improve the understandability of
benefit disclosure for final analysis. the Company has considered the
implications of SFAS 132 and has concluded that no additional disclosure is
required at this time.


                                       39
<PAGE>   40


         In June 1998, the Financial Accounting Standards Board issued Statement
of Financial Accounting Standards No. 133, "Accounting for Derivative
Instruments and Hedging Activities"("SFAS 133"). SFAS 133 establishes accounting
and reporting standards for derivative instruments and hedging activities. The
Company has considered the implications of SFAS 133 and has concluded that its
implementation will not have a material effect on the Company's consolidated
financial statements.

         During 1998, the American Institute of Certified Pubic Accountants
promulgated Statement of Position 98-5, "Reporting on the Costs of Start-up
Activities" ("SOP 98-5"). SOP 98-5 broadly defines start-up activities as those
one-time activities related to opening a new facility, introducing a new product
or service, conducting business in a new territory, conducting business with a
new class of customer or beneficiary, initiating a new process in an existing
facility, or commencing some new operation. SOP 98-5 requires that companies
expense start-up activities as incurred. Although SOP 98-5 is not effective
until fiscal years beginning after December 15, 1998, it does encourage entities
to early adopt its requirements. The Company has elected to early adopt SOP 98-5
effective July 1, 1998. Thus, in accordance with SOP 98-5, the Company has
recorded the after-tax charge as a cumulative effect of accounting change within
the Company's 1998 Consolidated Statement of Operations. The effect of this
change in accounting principle was to decrease net income by $1,326,000 (net of
related income tax benefits of $778,000) or $.02 per basic and diluted share.


ITEM 7A. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

                Newpark is exposed to certain market risks that are inherent in
the Company's financial instruments arising from transactions that are entered
into in the normal course of business. Historically, the Company has not entered
into derivative financial instrument transactions to manage or reduce market
risk or for speculative purposes. A discussion of the Company's primary market
risk exposure in financial instruments is presented below.

Long-term Debt

         The Company is subject to interest rate risk on its long-term fixed
interest rate senior subordinated notes. The bank credit facility has a variable
interest rate and accordingly is not subject to interest rate risk. All other
things being equal, the fair market value of debt with a fixed interest rate
will increase, and the amount required to retire the debt today will increase,
as interest rates fall and the fair market value will decrease as interest rates
rise. This exposure to interest rate risk is managed by borrowing money that has
a variable interest rate.

         The $125 million senior subordinated notes accrue interest at the rate
of 8-5/8% per annum and mature on December 15, 2007. There are no scheduled
principal payments under the notes prior to the maturity date. However, the
notes may be redeemed at a premium in whole or in part commencing after December
15, 2002. Up to 35% of the notes may be redeemed at a premium from proceeds of
an equity offering, at any time up to and including December 31, 2000. The
Company has no plans to repay the notes ahead of their scheduled maturity.


                                       40
<PAGE>   41


Investments

         Included in Other Assets is a note receivable with a face amount of
$8,534,000 related to the sale of substantially all of the assets of the
Company's former marine repair operations. The note bears simple interest at 5%
per annum, with accrued interest and principal payable at September 30, 2003.

Foreign Currency

                The Company's principal foreign operations are conducted in
Canada, Venezuela and Mexico. As such, there is exposure to future earnings due
to changes in foreign currency exchange rates when transactions are denominated
in currencies other than the Company's functional currencies, which are the
primary currencies in which the Company conducts its business in various
jurisdictions. At present, the Company does not use hedging arrangements to
offset any anticipated affects of such exposure.

FORWARD-LOOKING STATEMENTS

The foregoing discussion contains "forward-looking statements" within the
meaning of Section 27A of the Securities Act of 1933, as amended, and Section
21E of the Securities Exchange Act of 1934, as amended. There are risks and
uncertainties that could cause future events and results to differ materially
from those anticipated by management in the forward-looking statements included
in this report. Among these risks and uncertainties are (a) the level of
exploration for and production of oil and gas and the industry's willingness to
spend capital on environmental and oilfield services; (b) oil and gas prices,
expectations about future prices, the cost of exploring for, producing and
delivering oil and gas, the discovery rate of new oil and gas reserves and the
ability of oil and gas companies to raise capital; (c) domestic and
international political, military, regulatory and economic conditions; (d) other
risks and uncertainties generally applicable to the oil and gas exploration and
production industry; (e) any rescission or relaxation of existing regulations
affecting the disposal of E&P waste and NORM, failure of governmental
authorities to enforce such regulations or the ability of industry participants
to avoid or delay compliance with such regulations; (f) future technological
change and innovation, which could result in a reduction in the amount of waste
being generated or alternative methods of disposal being developed; (g)
increased competition in the Company's product lines; (h) the Company's success
in integrating acquisitions and (i), the Company's success in replacing its
wooden mat fleet with its new composite mats; (j) the Company's ability to
obtain the necessary permits to operate its non-hazardous waste disposal wells
and its ability to successfully compete in this market; (k) the Company's
ability to successfully compete in the drilling fluids markets in the Canadian
provinces of Alberta and Saskatchewan, the Permian Basin of West Texas and New
Mexico and the Anadarko Basin in Western Oklahoma, where it has only recently
entered the market ;and (l) adverse weather conditions, which could disrupt
drilling operations.


                                       41

<PAGE>   42


ITEM 8. FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

INDEPENDENT AUDITORS' REPORT

The Board of Directors and Stockholders
Newpark Resources, Inc.

         We have audited the accompanying consolidated balance sheets of Newpark
Resources, Inc. and subsidiaries as of December 31, 1998 and 1997, and the
related consolidated statements of operations, comprehensive income,
stockholders' equity, and cash flows, for each of the three years in the period
ended December 31, 1998. These financial statements are the responsibility of
the Company's management. Our responsibility is to express an opinion on the
financial statements based on our audits.

         We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement. An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements. An audit also includes
assessing the accounting principles used and significant estimates made by
management, as well as evaluating the overall financial statement presentation.
We believe that our audits provide a reasonable basis for our opinion.

         In our opinion, such consolidated financial statements present fairly,
in all material respects, the financial position of Newpark Resources, Inc. and
subsidiaries at December 31, 1998 and 1997, and the results of their operations
and their cash flows for each of the three years in the period ended December
31, 1998 in conformity with generally accepted accounting principles.

         As discussed in Note A of the Notes to Consolidated Financial
Statements, effective July 1, 1998, the Company changed its method of accounting
for costs of start-up activities.


DELOITTE & TOUCHE LLP

New Orleans, Louisiana
March  26, 1999







                                       42
<PAGE>   43


Newpark Resources, Inc.
CONSOLIDATED BALANCE SHEETS

<TABLE>
<CAPTION>
                                                                   December 31,   December 31,
- ----------------------------------------------------------------------------------------------
(In thousands, except share data)                                     1998           1997
- ----------------------------------------------------------------------------------------------
<S>                                                               <C>             <C>         
ASSETS

CURRENT ASSETS:
      Cash and cash equivalents                                   $      6,611    $     21,699
      Accounts and notes receivable, less allowance
          of $11,008 in 1998 and $2,266 in 1997                         65,675          74,768
      Inventories                                                       19,381          21,489
      Current taxes receivable                                          10,593            --
      Deferred tax asset                                                13,776           3,974
      Other current assets                                               3,292           1,712
                                                                  ------------    ------------
          TOTAL CURRENT ASSETS                                         119,328         123,642

Property, plant and equipment, at cost, net of
      accumulated depreciation                                         217,988         191,058
Cost in excess of net assets of purchased businesses and
      identifiable intangibles, net of accumulated amortization        123,539          97,542
Deferred tax asset                                                       1,735            --
Other assets                                                            41,889          39,381
                                                                  ------------    ------------
                                                                  $    504,479    $    451,623
                                                                  ============    ============


LIABILITIES AND STOCKHOLDERS' EQUITY

CURRENT LIABILITIES:
      Notes payable                                               $         72    $        275
      Current maturities of long-term debt                               1,195           1,499
      Accounts payable                                                  23,237          19,309
      Accrued liabilities                                               11,711          10,974
      Arbitration settlement payable                                     7,176            --
      Current taxes payable                                               --             2,703
                                                                  ------------    ------------
          TOTAL CURRENT LIABILITIES                                     43,391          34,760

Long-term debt                                                         208,057         127,996
Arbitration settlement payable                                           8,080            --
Other non-current liabilities                                            2,454           1,314
Deferred taxes payable                                                    --            17,568
Commitments and contingencies (See Note M)                                --              --

STOCKHOLDERS' EQUITY:
      Preferred Stock, $.01 par value, 1,000,000 shares
          authorized, no shares outstanding                               --              --
      Common Stock, $.01 par value, 100,000,000 shares
          authorized,  68,839,672 shares outstanding in 1998
          and 65,212,289 in 1997                                           688             652
      Paid-in capital                                                  319,833         283,271
      Foreign currency translation adjustments                          (1,033)           --
      Retained earnings (deficit)                                      (76,991)        (13,938)
                                                                  ------------    ------------
          TOTAL STOCKHOLDERS' EQUITY                                   242,497         269,985
                                                                  ------------    ------------
                                                                  $    504,479    $    451,623
                                                                  ============    ============
</TABLE>
          

          See accompanying Notes to Consolidated Financial Statements




                                       43
<PAGE>   44


Newpark Resources, Inc.
CONSOLIDATED STATEMENTS OF OPERATIONS
Years Ended December 31,

<TABLE>
<CAPTION>
- ----------------------------------------------------------------------------------------------------------------
(In thousands, except per share data)                                   1998             1997            1996
- ----------------------------------------------------------------------------------------------------------------
<S>                                                                 <C>             <C>             <C>         
Revenues                                                            $    256,808    $    233,245    $    153,679
Operating costs and expenses:
      Cost of services provided                                          176,551         138,392         100,627
      Operating costs                                                     68,243          27,726          15,141
                                                                    ------------    ------------    ------------
                                                                         244,794         166,118         115,768

General and administrative expenses                                        4,305           3,185           2,920
Provision for uncollectible accounts                                       9,180            --              --
Impairment of long-lived assets                                           52,266            --              --
Arbitration settlement                                                    27,463            --              --
Equity in net loss of                                                       --              --
      unconsolidated affiliates                                            1,293            --              --
Restructure expense                                                         --              --             2,432
                                                                    ------------    ------------    ------------
Operating income (loss)                                                  (82,493)         63,942          32,559
Interest income                                                           (1,488)           (310)           (273)
Interest expense                                                          11,554           4,265           3,996
                                                                    ------------    ------------    ------------

Income (loss) before income taxes                                        (92,559)         59,987          28,836
Provision (benefit) for income taxes                                     (30,270)         22,246           9,884
                                                                    ------------    ------------    ------------
Income (loss) before cumulative effect
      of accounting change                                               (62,289)         37,741          18,952
Cumulative effect of accounting
      change (net of income tax effect)                                   (1,326)           --              --
                                                                    ------------    ------------    ------------

Net income (loss)                                                   $    (63,615)   $     37,741    $     18,952
                                                                    ============    ============    ============

Net income (loss) per common and common equivalent share:
      Basic                                                         $      (0.95)   $       0.59    $       0.36
                                                                    ============    ============    ============
      Diluted                                                       $      (0.95)   $       0.58    $       0.34
                                                                    ============    ============    ============

Weighted average common and common equivalent shares outstanding:
      Basic                                                               67,058          64,158          53,197
                                                                    ============    ============    ============
      Diluted                                                             67,058          65,630          54,956
                                                                    ============    ============    ============
</TABLE>



          See accompanying Notes to Consolidated Financial Statements



                                       44
<PAGE>   45



Newpark Resources, Inc.
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Years Ended December 31,

<TABLE>
<CAPTION>
- ------------------------------------------------------------------------------------------------
(In thousands)                                           1998            1997         1996
- ------------------------------------------------------------------------------------------------
<S>                                                  <C>             <C>            <C>         
Net income (loss)                                    $    (63,615)   $     37,741   $     18,952


Other comprehensive income (loss):
          Foreign currency translation adjustments         (1,033)           --             --
                                                     ------------    ------------   ------------

Comprehensive income (loss)                          $    (64,648)   $     37,741   $     18,952
                                                     ============    ============   ============


</TABLE>







          See accompanying Notes to Consolidated Financial Statements







                                       45
<PAGE>   46

Newpark Resources, Inc.
CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY
Years Ended December 31, 1996, 1997 and 1998

<TABLE>
<CAPTION>
- ---------------------------------------------------------------------------------------------------------------
                                                                         Foreign        Retained
                                                  Common      Paid-In    Currency       Earnings
(In thousands)                                     Stock      Capital   Translation     (Deficit)       Total
- ---------------------------------------------------------------------------------------------------------------
<S>                                            <C>          <C>          <C>           <C>           <C>       
BALANCE, JANUARY 1, 1996                       $      468   $  149,756   $     --      $  (69,997)   $   80,227

    Employee stock options                             12        4,944         --              (2)        4,954
    Issuance of stock                                 140       96,249         --            --          96,389
    Acquisitions                                        4        5,836         --            --           5,840
    Net income                                                                             18,952        18,952
                                               ----------   ----------   ----------    ----------    ----------

BALANCE, DECEMBER 31, 1996                            624      256,785         --         (51,047)      206,362

    Employee stock options                             13        9,090         --              (7)        9,096
    Incentive plan                                   --            668         --            --             668
    Acquisitions                                       15       16,728         --            --          16,743
    Results of operations of pooled entity
       due to different year end                     --           --           --            (625)         (625)
    Net income                                       --           --           --          37,741        37,741
                                               ----------   ----------   ----------    ----------    ----------

BALANCE, DECEMBER 31, 1997                            652      283,271         --         (13,938)      269,985

    Employee stock options                              9        6,757         --              (1)        6,765
    Incentive plan                                      4        6,468         --            --           6,472
    Acquisitions                                       23       23,337         --            --          23,360
    Foreign currency translation                     --           --         (1,033)         --          (1,033)
    Results of operations of pooled entities
       due to different year ends                    --           --           --             563           563
    Net loss                                         --           --           --         (63,615)      (63,615)
                                               ----------   ----------   ----------    ----------    ----------

BALANCE, DECEMBER 31, 1998                     $      688   $  319,833   $   (1,033)   $  (76,991)   $  242,497
                                               ==========   ==========   ==========    ==========    ==========
</TABLE>




          See accompanying Notes to Consolidated Financial Statements




                                       46
<PAGE>   47



Newpark Resources, Inc.
CONSOLIDATED STATEMENTS OF CASH FLOWS
Years Ended December 31,

<TABLE>
<CAPTION>

- ------------------------------------------------------------------------------------------------------------
(In thousands )                                                        1998           1997          1996
- ------------------------------------------------------------------------------------------------------------
<S>                                                                <C>            <C>            <C>        
CASH FLOWS FROM OPERATING ACTIVITIES:
Net (loss) income                                                  $   (63,615)   $    37,741    $    18,952
Adjustments to reconcile net income to net cash provided by
      operating activities:
      Depreciation and amortization                                     37,901         26,393         17,572
      (Benefit) provision for deferred income taxes                    (25,965)        15,880          6,168
      Loss on sales of assets                                               45            147             36
      Provision for doubtful accounts                                    9,180           --              775
      Impairment of long-lived assets                                   52,266           --             --
      Arbitration settlement                                            22,056           --             --
      Net loss in unconsolidated affiliates                              1,293           --             --
Change in assets and liabilities net of effects of acquisitions:
      Decrease (increase) in accounts and notes receivable              11,434        (21,221)       (11,065)
      Decrease (increase)  in inventories                                3,605        (12,195)           129
      Increase in other assets                                          (8,228)        (6,814)           (99)
      (Decrease) increase in accounts payable                           (6,920)        (3,685)         2,222
      Decrease in accrued liabilities and other                         (3,813)        (4,571)        (9,255)
                                                                   -----------    -----------    -----------
          NET CASH PROVIDED BY OPERATING ACTIVITIES                     29,239         31,675         25,435
                                                                   -----------    -----------    -----------

CASH FLOWS FROM INVESTING ACTIVITIES:
      Capital expenditures                                            (104,660)       (79,476)       (46,500)
      Proceeds from sale of property, plant and equipment                  382             40          1,492
      Investment in joint ventures                                        --           (4,833)        (4,406)
      Acquisitions, net of cash acquired                               (15,809)        (7,679)       (71,461)
      Payments received on notes receivable                              2,456             70            440
      Advances on notes receivable                                      (1,734)        (3,000)          (112)
      Purchase of patents                                                 --             --           (5,700)
                                                                   -----------    -----------    -----------
          NET CASH USED IN INVESTING ACTIVITIES                       (119,365)       (94,878)      (126,247)
                                                                   -----------    -----------    -----------

CASH FLOWS FROM FINANCING ACTIVITIES:
      Net borrowings on line of credit                                  80,900           --            5,749
      Principal payments on notes payable
       and long-term debt                                              (10,001)       (46,777)       (12,294)
      Proceeds from issuance of  debt                                      452        125,122          4,908
      Proceeds from exercise of stock options                            3,687          4,114          4,953
      Proceeds from issuance of stock, net of expenses                    --             --           98,066
                                                                   -----------    -----------    -----------
          NET CASH PROVIDED BY FINANCING ACTIVITIES                     75,038         82,459        101,382
                                                                   -----------    -----------    -----------

NET (DECREASE) INCREASE  IN CASH AND CASH EQUIVALENTS                  (15,088)        19,256            570

CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR                          21,699          2,443          1,873
                                                                   -----------    -----------    -----------

CASH AND CASH EQUIVALENTS AT END OF YEAR                           $     6,611    $    21,699    $     2,443
                                                                   ===========    ===========    ===========
</TABLE>


          See accompanying Notes to Consolidated Financial Statements.



                                       47
<PAGE>   48



                             NEWPARK RESOURCES, INC.
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


A.       SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

ORGANIZATION AND PRINCIPLES OF CONSOLIDATION. Newpark Resources, Inc. ("Newpark"
or the "Company") provides integrated fluids management, environmental and
oilfield services to the exploration and production industry in the Gulf Coast
region, principally Louisiana and Texas. The consolidated financial statements
include the accounts of the Company and its wholly-owned subsidiaries.
Investments in which the Company owns 20 percent to 50 percent and exercises
significant influence over operating and financial policies are accounted for
using the equity method. All material intercompany transactions are eliminated
in consolidation.

USE OF ESTIMATES. The preparation of financial statements in conformity with
generally accepted accounting principles requires management to make estimates
and assumptions that affect the reported amounts of assets and liabilities, the
disclosure of contingent assets and liabilities at the date of the financial
statements and the reported amounts of revenues and expenses during the
reporting period. Actual results could differ from those estimates.

CASH EQUIVALENTS. All highly liquid investments with a remaining maturity of
three months or less at the date of acquisition are classified as cash
equivalents.

FAIR VALUE DISCLOSURES. Statement of Financial Accounting Standards ("SFAS") No.
107, "Disclosures about Fair Value of Financial Instruments", requires the
disclosure of the fair value of all significant financial instruments. The
estimated fair value amounts have been developed based on available market
information and appropriate valuation methodologies. However, considerable
judgment is required in developing the estimates of fair value. Therefore, such
estimates are not necessarily indicative of the amounts that could be realized
in a current market exchange. After such analysis, except as described below,
management believes the carrying values of the Company's significant financial
instruments (consisting of cash and cash equivalents, receivables, payables and
long-term debt, primarily the Senior Subordinated Notes issued in December of
1997) approximate fair values at December 31, 1998 and 1997.

         The estimated fair value of the Company's senior subordinated notes
payable at December 31, 1998 and 1997, based upon available market information,
was $118.8 million and $125.0 million, respectively, as compared to the carrying
amount of $125.0 million on those dates.

INVENTORIES. Inventories are stated at the lower of cost (principally average
and first-in, first-out) or market. Such inventories consist of logs, supplies,
processed barite, other specialty chemicals used in drilling fluids, and board
road lumber. Board road lumber is amortized on the straight-line method over its
estimated useful life of approximately one year.

DEPRECIATION AND AMORTIZATION. Depreciation of property, plant and equipment,
including interlocking composite and board road mats, is provided for financial
reporting purposes on the straight-line method over the estimated useful lives
of the individual assets which range from three to forty years.

         The cost in excess of net assets of purchased businesses ("excess
cost") is being amortized on a straight-line basis over fifteen to thirty-five
years, except for $2,211,000 relating to acquisitions prior 





                                       48
<PAGE>   49

to 1971 that is not being amortized. Management of the Company periodically
reviews the carrying value of the excess cost in relation to the current and
expected undiscounted cash flows of the businesses which benefit therefrom in
order to assess whether there has been a permanent impairment of the excess cost
of the net purchased assets. Accumulated amortization on excess cost was
$8,954,000 and $3,936,000 at December 31, 1998 and 1997, respectively.

REVENUE RECOGNITION. In substantially all of its operating segments, Newpark
recognizes revenue on a units of delivery basis. E&P waste and NORM disposal
revenues are generally recognized upon receipt of waste for processing, while
drilling fluids sales and engineering revenues are generally recognized upon
delivery of products or services. Revenues from certain integrated service
projects, which are typically of short duration, are recognized as projects
progress based upon sales values agreed to by the customer for specific units
delivered or project milestones completed. Included in accounts receivable are
unbilled revenues for projects in progress in the amounts of $3,663,000 and
$7,509,000 at December 31, 1998 and 1997, respectively, all of which are due
within one year.

INCOME TAXES. Income taxes are provided using the liability method in accordance
with SFAS No. 109, "Accounting for Income Taxes." Under this method, deferred
income taxes are recorded based upon differences between the financial reporting
and income tax basis of assets and liabilities and are measured using the
enacted income tax rates and laws that will be in effect when the differences
are expected to reverse.

INTEREST CAPITALIZATION. For the years ended December 31, 1998, 1997 and 1996
the Company incurred interest cost of $14,114,000, $5,372,000, and $4,511,000,
respectively, of which $2,560,000, $1,107,000, and $515,000, respectively, was
capitalized on qualifying construction projects.

STOCK-BASED COMPENSATION. SFAS No. 123, "Accounting for Stock-Based
Compensation" ("SFAS 123") encourages, but does not require, companies to record
compensation cost for stock-based employee compensation plans at fair value. The
Company has chosen to continue to account for stock-based compensation using the
intrinsic value method prescribed in Accounting Principles Board Opinion No. 25,
"Accounting for Stock Issued to Employees," and related interpretations, and has
adopted the disclosure-only provisions of SFAS 123.

RECLASSIFICATIONS. Certain reclassifications of amounts reported in prior years
have been made to conform to the current year presentation.

NEW ACCOUNTING STANDARDS. During 1997, the Financial Accounting Standards Board
issued Statement of Financial Accounting Standards No. 130 "Reporting
Comprehensive Income" ("SFAS 130") and Statement of Financial Accounting
Standards No. 131 :Disclosure about Segments of an Enterprise and Related
Information" ("SFAS 131"). SFAS 130 provides guidance for the presentation and
display of comprehesive income. SFAS 131 establishes standards for disclosure of
operating segments, products, services, geographic areas and major customers.
The Company has adopted SFAS 130 and has included the required Statements of
Comprehensive Income within its consolidated financial statements with the same
prominence as its other consolidated financial statements. In addition, the
Company has considered the implications of SFAS 131 and has included the
required disclosure in Note P.

         In February 1998, the Financial Accounting Standards Board issued
Statement of Financial Accounting Standards No. 132, "Employers' Disclosure
about Pensions and Other Postretirement Benefits" ("SFAS 132"). SFAS 132 revises
the standards for disclosure of pension and other postretirement benefit plans
by standardizing the disclosure requirements, requiring additional





                                       49
<PAGE>   50

information on changes in the benefit obligations and fair values of plan
assets. and eliminating certain disclosure requirements no longer considered to
be useful. The new disclosure requirements are designed to improve the
understandability of benefit disclosure for final analysis. the Company has
considered the implications of SFAS 132 and has concluded that no additional
disclosure is required at this time.

         In June 1998, the Financial Accounting Standards Board issued Statement
of Financial Accounting Standards No. 133, "Accounting for Derivative
Instruments and Hedging Activities"("SFAS 133"). SFAS 133 establishes accounting
and reporting standards for derivative instruments and hedging activities. The
Company has considered the implications of SFAS 133 and has concluded that its
implementation will not have a material effect on the Company's consolidated
financial statements.

         During 1998, the American Institute of Certified Public Accountants
promulgated Statement of Position 98-5, "Reporting on the Costs of Start-up
Activities" ("SOP 98-5"). SOP 98-5 broadly defines start-up activities as those
one-time activities related to opening a new facility, introducing a new product
or service, conducting business in a new territory, conducting business with a
new class of customer or beneficiary, initiating a new process in an existing
facility, or commencing some new operation. SOP 98-5 requires that companies
expense start-up activities as incurred. Although SOP 98-5 is not effective
until fiscal years beginning after December 15, 1998, it does encourage entities
to early adopt its requirements. The Company has elected to early adopt SOP 98-5
effective July 1, 1998. Thus, in accordance with SOP 98-5, the Company has
recorded the after-tax charge as a cumulative effect of accounting change within
the Company's 1998 Consolidated Statement of Operations. The effect of this
change in accounting principle was to decrease net income by $1,326,000 (net of
related income tax benefits of $778,000) or $.02 per basic and diluted share.

B.       ACQUISITIONS AND DISPOSITIONS

         During 1998 and 1997, Newpark issued an aggregate of 1,151,000 shares
and 3,496,668 shares, respectively, of its common stock in exchange for all of
the outstanding common stock of the following six companies:

<TABLE>
<CAPTION>
                Company Name                Type of Company     Location            Shares        
         ----------------------------       ---------------     ---------------   ---------           
<S>                                         <C>                 <C>               <C>
         1998 acquisitions:
         Southwestern Universal Corp        Drilling Fluids     West Texas          450,000
         Optimum Fluids, Inc.               Drilling Fluids     Western Canada      281,000
         Houston Prime Pipe & Supply        Solids Control      Gulf Coast          420,000
                                                                                  ---------
                                                                                  1,151,000

         1997 acquisitions:

         Sampey, Bilbo, Meschi Drilling
           Fluids Management, Inc.          Drilling Fluids      Gulf Coast       2,328,000
         Excalibar Minerals, Inc.           Barite Grinding      Gulf Coast         666,668
         Bockmon Construction Company       Site Preparation     Gulf Coast         502,000
                                                                                  ---------
                                                                                  3,496,668
</TABLE>

         These business combinations have been accounted for as poolings of
interests, and accordingly, the consolidated financial statements for periods
prior to the combinations have been restated to include the accounts and results
of operations of these entities.





                                       50
<PAGE>   51

         Prior to the combinations, the year end for two of the entities was
September 30 and the year end for one of the entities was October 31. Newpark's
fiscal year is December 31. In applying pooling of interests accounting, the
December 31, 1997 and 1996 Newpark consolidated statements of operations were
combined with the statements of operations for the corresponding year end of
each pooled entity. Retained earnings (deficit) of the combined entities were
adjusted by $563,000 and ($625,000) as of the beginning of Newpark's fiscal 1998
and 1997 years, respectively, to include net income/(losses) of the pooled
entities for the periods October 1, 1997 to December 31, 1997 and November 1,
1996 to December 31, 1996. During these periods, the revenues of the pooled
entities which were excluded from the consolidated statements of operations were
$3.9 million and $3.0 million, for 1997 and 1996, respectively. Amounts included
in the accompanying consolidated statements of operations for the years ended
December 31, 1997 include the results of these entities for the year ended
September 30, 1997. Amounts included in the accompanying consolidated statements
of operations for the years ended December 31, 1996 include the results of these
entities for the years ended and September 30, 1996 and October 31, 1996.

         Operating results prior to the combination of the separate companies
and the combined amounts presented in the consolidated financial statements are
summarized below:

<TABLE>
<CAPTION>
- ------------------------------------------------------------------------------------
                                                          Year Ended
  (In thousands of dollars)                               December 31,
- ------------------------------------------------------------------------------------

                                               1998           1997           1996         
- ------------------------------------------------------------------------------------
<S>                                        <C>            <C>            <C>        
Revenues:
        Newpark                            $   249,313    $   210,277    $   121,542
        Houston Prime                            4,448          6,022          1,773
        Optimum                                  2,016          1,813           --
        Southwestern                             1,031          6,882          3,534
        Bockmon                                   --            3,174          3,936
        Excalibar                                 --            5,077          8,462
        SBM                                       --             --           14,432
- ------------------------------------------------------------------------------------
        Combined                           $   256,808    $   233,245    $   153,679
====================================================================================
Net Income (Loss):
        Newpark                            $   (64,590)   $    36,909    $    18,453
        Houston Prime                              789            805             14
        Optimum                                     (6)          (354)          --
        Southwestern                               192            162           (102)
        Bockmon                                   --               12            (65)
        Excalibar                                 --              207            602
        SBM                                       --             --               50
- ------------------------------------------------------------------------------------
        Combined                           $   (63,615)   $    37,741    $    18,952
====================================================================================
</TABLE>


         In addition to these transactions, Newpark acquired, in the aggregate,
eight other companies in 1998 and seven other companies in 1997. These
acquisitions have been accounted for by the purchase method and include the
results of operations of the acquired companies since their respective
acquisition dates. These acquisitions were completed in exchange for an
aggregate of 2,346,771 shares of Newpark common stock and $22,652,000 in cash
during 1998 and 1,193,332 shares of Newpark common stock and $9,186,000 in cash
during 1997. The purchase prices were allocated based on preliminary estimates
of fair values at the dates of acquisition. The Company does not believe that
the final purchase price allocation will differ significantly from the
preliminary purchase price allocation. This resulted in an excess of purchase
price over assets acquired of $51,671,000, which is being amortized on a
straight-line basis over 15 to 20 years.





                                       51
<PAGE>   52

         The purchase price was allocated to the net assets acquired based on
their fair values at the date of acquisition, as follows:

<TABLE>
<CAPTION>
                                                        1998           1997
                                                     -----------    -----------
<S>                                                  <C>            <C>        
Current assets                                       $    15,078    $     3,240
Property, Plant & Equipment                                6,579         10,848
Liabilities assumed                                      (17,729)        (6,096)
Goodwill                                                  35,241         16,430
                                                     -----------    -----------
Total purchase price, net of cash acquired                39,169         24,422
Less value of common stock issued                        (23,360)       (16,743)
                                                     -----------    -----------
Cash purchase price, net of cash acquired            $    15,809    $     7,679
                                                     ===========    ===========
</TABLE>


         The following unaudited pro forma summary presents the consolidated
results of operations of the Company as if the above purchase acquisitions had
occurred on January 1, 1997:

<TABLE>
<CAPTION>

- ---------------------------------------------------------------------------------------------
(In thousands, except per share amounts)                             1998            1997
- ---------------------------------------------------------------------------------------------
<S>                                                             <C>               <C>        
Revenues                                                        $    279,496      $   276,476
Net income (loss)                                                    (62,047)          37,777
Net income (loss) per common and
   common equivalent share:
         Basic                                                  $       (.90)     $      0.58
         Diluted                                                        (.90)            0.56
=============================================================================================
</TABLE>

      The above unaudited proforma amounts have been prepared for comparative
purposes only and include certain adjustments, such as additional amortization
expense as a result of goodwill, additional depreciation expense for assets
recorded at fair market value at the date of acquisition, additional interest
expense for borrowings, and the net impact of the above adjustments on income
tax expense. They do not purport to be indicative of the results of operations
which actually would have resulted had the combination been in effect on January
1, 1997, or of future results of operations of the consolidated entities.

         On August 12, 1996, the Company acquired from Campbell Wells, Ltd.
("Campbell") substantially all of the non-landfarm assets and certain leases
associated with five transfer stations located along the Gulf Coast and three
receiving docks at the landfarm facilities operated by Campbell for cash
consideration of $70.5 million. This acquisition has been accounted for under
the purchase method, and the results of the operations of the acquired business
have been included in the consolidated financial statements since the date of
acquisition. The purchase price was allocated based on estimated fair values at
the date of acquisition. This resulted in an excess of purchase price over
assets acquired of $77.1 million, of which $68.6 million is being amortized on a
straight-line basis over 35 years, $7.5 million, attributable to a non-compete
agreement, was being amortized on a straight-line basis over 25 years and $1.0
million, attributable to dock leases, which is being amortized over the
respective lease terms. As a result of the signing of a Settlement Agreement
with U.S. Liquids, Inc. (see Notes C and M), the remaining unamortized value of
the non-compete agreement was reduced to $900,000, (the estimated fair market
value) and is being amortized over the revised non-compete period of three
years. The adjustment to the unamortized balance of the non-compete agreement of
$6.1 million was included in arbitration settlement charged to operations in
1998.




                                       52
<PAGE>   53

         In conjunction with this acquisition and the acquisition of a new waste
disposal license in 1996, the Company recorded a restructure charge of $2.4
million, $1.6 million after taxes, or $0.03 per common share. A total of
approximately $1.8 million was related to the restructuring of certain of the
Company's E&P waste processing operations and staffing changes to facilitate the
integration of its operations with those recently acquired by Campbell. The
Company recognized an additional $.6 million cost associated with the
termination of processing operations at its original NORM facility at Port
Arthur, Texas and the partial closure of the site.

         On August 29, 1996, the Company sold the land, buildings and certain
equipment comprising substantially all of the assets of its former marine repair
operation to the operator of the facility and refinanced certain advances
previously made to the operator. The assets sold had previously been subject to
an operating lease to the same party, and the purchase was made under the terms
of a purchase option granted in the original lease. The sales price of
approximately $16.0 million represents the net book value of the assets sold and
refinanced. The consideration received included $1.2 million in cash, $7.2
million in notes receivable and $7.6 million in debt obligations which were
assumed by the operator. The notes receivable are included in other assets and
have been recorded at their estimated fair value, which approximates the amount
at which they can be prepaid at the operator's option during the term of the
notes. The notes receivable include two notes, one of which is in the face
amount of $8,534,000, bears simple interest at 5.0% per annum, with interest and
principal payable at September 30, 2003. The second note, in the amount of
$600,000 bearing interest at 8% per annum, was subsequently paid off during the
first quarter of 1998. The remaining note is secured by a second lien on the
assets sold as well as certain guarantees of the operator.

C.       SIGNIFICANT 1998 CHARGES

         During the mid 1990's through the first half of 1998 the Company
experienced significant growth through a series of strategic acquisitions and
mergers, and increasing demand for its related products and services. Due to a
significant decrease in the price of oil and gas and the resultant impact on
drilling activity, the Company experienced a sharp decline in the demand for its
products and services during the third and fourth quarters of 1998. This decline
in customer demand materialized quickly from the previous growth period and,
coupled with the timing of the Company's continued efforts to bring certain
proprietary innovations to its customers, caused the Company to re-assess its
overall operations. This re-assessment, as well as the settlement of an
arbitration dispute, resulted in the Company recording pretax charges during
1998 of $9.2 million ($4 million and 5.2 million in the third and fourth
quarters, respectively) for a provision for uncollectible accounts, $52.3
million ($20.4 million and $31.9 million in the third and fourth quarters,
respectively) for the impairment of long-lived assets, and $27.5 million ($9.1
million and $18.4 million in the third and fourth quarters, respectively)
relating to the arbitration settlement.

         The provision for uncollectible accounts is primarily related to the
weakness in the commodity prices of oil and gas and the resulting liquidity
problems encountered by a number of customers to whom the Company has sold
products or services. The majority of the current year provision relates to
three specific customers.

         The impairment of long-lived assets includes $43.0 million for the
write-down of the Company's wooden board road mat fleet used in its mat and
integrated services segment. The Company is in the process of converting a
significant portion of its domestic rental fleet to a new composite mat.
Accordingly, the Company has disposed of many of its older mats, which would
normally have required




                                       53
<PAGE>   54

maintenance and repair costs to be expended. The write-down represents the net
book value associated only with mats that have been abandoned and destroyed. An
impairment charge related to any of the remaining wooden mats currently in
service has not been recorded. The Company also incurred an impairment of $1.3
million in its mat & integrated services segment representing the net book value
of a machine previously used in remediation operations that was abandoned after
it was rendered obsolete by other new equipment introduced by the Company, which
is technologically superior.

         Also, included in the impairment was $4.7 million of write-downs for
assets used in the Company's fluids sales & engineering segment. These assets
have either been abandoned (primarily warehouses and mixing plants located in
the Austin Chauk region) due to market conditions or were written down to their
disposal value due to excess capacity created by a downturn in the Company's
operations.

         In addition, in the impairment was $1.3 million to write-down barges to
their disposal value which were previously used in the Company's E&P waste
disposal segments which are no longer required due to decreased volumes of waste
being handled. The Company also incurred a write-down of $1.9 million in this
segment relating to the abandonment of additional disposal sites being
constructed for future use. Due to the downturn in the oilfield waste market
created by reduced oilfield drilling, the Company will not pursue bringing this
additional capacity on-line.

         The $27.5 million of charges relating to the arbitration settlement
stems from the settlement during the third quarter (with final modifications
during the fourth quarter) between the Company's E&P waste disposal segment and
U. S. Liquids, Inc. ("USL") over a contract dispute which is discussed more
fully in Note M. The total settlement was $30 million, of which $6 million was
paid in 1998 and $11 million, $9 million and $4 million will be paid in 1999,
2000 and 2001, respectively. The settlement provided for, among other things, 1)
the termination of Newpark's original contractual commitment to provide waste to
USL's disposal facilities for twenty-five years and 2) the right, but not the
obligation to deliver specified volumes of E&P waste to USL's facilities until
June 30, 2001 without additional cost. The right to deliver waste was valued at
its estimated fair market value of $8 million based on the volumes that can be
delivered and the market price to dispose of such waste. This amount is being
recorded as a charge to operations over the disposal period. The termination
feature was valued at $22 million, which represented the balance of the total
settlement and an obligation was recorded based on the present value of the
contractual payments assigned to the termination feature. At December 31, 1998,
the recorded amount of the obligation was $15.3 million. Total pretax charges
associated with the settlement of $27.5 million includes a $6.1 million write
down to the estimated fair value of the remaining non-compete with U.S. Liquids
with the remaining $21.4 million representing the portion of the settlement
associated with the termination feature.

         The above charges, which were primarily non-cash, or will be paid over
an extended period of time, contributed significantly to the reported net loss
for 1998. To compensate for the sharp decline in the markets it serves, the
Company has also made significant changes in its operations, including disposal
of non-performing assets, closure of facilities and reductions in staffing
levels in all of its business segments. In addition, since December 31, 1998,
the Company has paid down approximately $12 million of the outstanding balance
under the credit facility and has obtained the necessary amendments to such
credit facility to provide for covenants which are consistent with the Company's
current financial condition and anticipated market outlook.





                                       54
<PAGE>   55




D.       INVENTORY

         The Company's inventory consisted of the following items at December
31, 1998 and 1997:

<TABLE>
<CAPTION>
- ----------------------------------------------------------------------------------------------------------------------
(In thousands)                                                                  1998                          1997
- ----------------------------------------------------------------------------------------------------------------------
<S>                                                                         <C>                           <C>         
Board road lumber                                                           $     1,276                   $      5,017
Logs                                                                              4,835                          8,546
Drilling fluids raw materials and components                                     11,385                          6,058
Supplies                                                                          1,285                            926
Other                                                                               600                            942
                                                                            -----------                   ------------
   Total                                                                    $    19,381                   $     21,489
                                                                            ===========                   ============
</TABLE>

E.       PROPERTY, PLANT AND EQUIPMENT

         The Company's investment in property, plant and equipment at December
31, 1998 and 1997 is summarized as follows:

<TABLE>
<CAPTION>
- ----------------------------------------------------------------------------------------------------------------------
(In thousands)                                                                  1998                          1997
- ----------------------------------------------------------------------------------------------------------------------
<S>                                                                         <C>                           <C>         
Land                                                                        $     9,770                   $      8,190
Buildings and improvements                                                       33,753                         41,870
Machinery and equipment                                                         152,304                         86,492
Board road mats                                                                  71,660                        114,504
Other                                                                             6,111                          3,730
                                                                            -----------                   ------------
                                                                                273,598                        254,786
Less accumulated depreciation                                                   (55,610)                       (63,728)
                                                                            -----------                   ------------
                                                                            $   217,988                   $    191,058
======================================================================================================================
</TABLE>

F.       CREDIT ARRANGEMENTS AND LONG-TERM DEBT

         Credit arrangements and long-term debt consisted of the following at
December 31, 1998 and 1997:

<TABLE>
<CAPTION>
- ----------------------------------------------------------------------------------------------------------------------
(In thousands)                                                                     1998                        1997
- ----------------------------------------------------------------------------------------------------------------------
<S>                                                                             <C>                        <C>        
Senior subordinated notes                                                       $  125,000                 $   125,000
Bank line of credit                                                                 80,900                           -
Building loan                                                                        1,335                       1,683
Other, principally installment notes secured by
  machinery and equipment, payable through
   2001 with interest at 2.0% to 13.5%                                               2,017                       2,812
                                                                                ----------                 -----------
                                                                                   209,252                     129,495

Less:  current maturities of long-term debt                                         (1,195)                     (1,499)
                                                                                ----------                 -----------
Long-term portion                                                               $  208,057                 $   127,996
======================================================================================================================
</TABLE>

         On December 17, 1997 the Company issued $125 million of unsecured
senior subordinated notes (the "Notes"), which mature on December 15, 2007.
Interest on the Notes accrues at the rate of 8-5/8% per annum and is payable
semi-annually on each June 15 and December 15, commencing June 15, 1998. The
Notes may be redeemed, in whole or in part, at a premium commencing after
December 15, 2002. Up to 35% of the Notes may be redeemed from proceeds of an
equity offering, at a premium at any time up to and including December 1, 2000.
The Notes are subordinated to all senior indebtedness, as defined in the
subordinated debt indenture, including the Company's bank revolving credit
facility.




                                       55
<PAGE>   56

         The Notes are guaranteed by substantially all operating subsidiaries of
the Company (the "Subsidiary Guarantors"). The guarantee obligations of the
Subsidiary Guarantors (which are all direct or indirect wholly owned
subsidiaries of the Company) are full, unconditional and joint and several. The
aggregate assets, liabilities, earnings, and equity of the Subsidiary Guarantors
are substantially equivalent to the total assets, liabilities, earnings, and
equity of Newpark Resources, Inc. and its subsidiaries on a consolidated basis.
Separate financial statements of the Subsidiary Guarantors are not included in
the accompanying financial statements because management of the Company has
determined that the additional information provided by separate financial
statements of the Subsidiary Guarantors would not be of material value to
investors.

         As of December 31, 1998, the Company maintained a $100.0 million bank
credit facility in the form of a revolving line of credit commitment. The credit
facility is unsecured. It bears interest at either a specified prime rate (7.75%
at December 31, 1998) or the LIBOR rate (5.07% at December 31, 1998) plus a
spread which is determined quarterly based upon the ratio of the Company's
funded debt to cash flow. The weighted average interest rate on the outstanding
balance under the credit facility in 1998 and 1997 was 5.87% and 7.04%,
respectively. The line of credit requires monthly interest payments and matures
on June 30, 2001. At December 31, 1998, $15.6 million of letters of credit were
issued and outstanding, leaving a net of $84.4 million available for cash
advances under the line of credit. The credit facility requires that the Company
maintain certain specified financial ratios and comply with other usual and
customary requirements. One of the requirements was that the Company could not
incur net losses for two consecutive fiscal quarters. Due primarily to the asset
impairments and the arbitration settlement which were recorded during the third
and fourth quarters of 1998, the Company sustained net losses for two
consecutive quarters. The lenders have waived this default and amended the 
credit facility to provide for covenants which are consistent with the Company's
current financial condition and market outlook. At December 31, 1998, the 
Company was in compliance with all other requirements of the respective
agreements, as amended. In addition, the Notes and the credit facility contain
covenants which significantly limit the payment of dividends on the common stock
of the Company.

         Maturities of long-term debt are $1,195,000 in 1999, $854,000 in 2000,
$81,291,000 in 2001, $242,000 in 2002, $211,000 in 2003 and $125,459,000
thereafter.

G.       INCOME TAXES

         The provision for income taxes charged to operations is principally U.
S. Federal tax as follows: 

<TABLE>
<CAPTION>
                                                                                Year Ended December 31,
- ------------------------------------------------------------------------------------------------------------------
(In thousands)                                                      1998                 1997              1996
- ------------------------------------------------------------------------------------------------------------------
<S>                                                            <C>                  <C>                 <C>       
Current tax expense (benefit)                                  $     (5,083)        $      6,366        $    3,716
Deferred tax expense (benefit)                                      (25,965)              15,880             6,168
                                                               ------------         ------------        ----------
Total provision (benefit)                                      $    (31,048)        $     22,246        $    9,884
==================================================================================================================
</TABLE>

         The effective income tax rate is reconciled to the statutory federal
income tax rate as follows:

<TABLE>
<CAPTION>
                                                                                Year Ended December 31,   
- ------------------------------------------------------------------------------------------------------------------
                                                                    1998                 1997              1996  
- ------------------------------------------------------------------------------------------------------------------
<S>                                                            <C>                  <C>                 <C>       
Income tax expense (benefit) at statutory rate                        (35.0)%               35.0%             35.0%
Non-deductible expenses                                                 1.4                  1.5                .6
Tax effect of NOL                                                        --                   .4              (1.0)
Other                                                                    .8                   .2               (.3)
                                                               ------------         ------------        ----------

Total income tax expense (benefit)                                   (32.8)%                37.1%             34.3%
=====================================================================================================+============
</TABLE>





                                       56
<PAGE>   57

         For federal income tax purposes, the Company has net operating loss
carryforwards ("NOLs") of approximately $62 million (net of amounts disallowed
pursuant to IRC Section 382) that, if not used, will expire in 1999 through
2018. The Company also has approximately $2.3 million of alternative minimum tax
credit carryforwards, which are not subject to expiration and are available to
offset future regular income taxes subject to certain limitations. Additionally,
for state income tax purposes, the Company has NOLs of approximately $74 million
available to reduce future state taxable income. These NOLs expire in varying
amounts beginning in year 2000 through 2013.

         Temporary differences and carryforwards which give rise to a
significant portion of deferred tax assets and liabilities at December 31, 1998
and 1997 are as follows:

<TABLE>
<CAPTION>
- ---------------------------------------------------------------------------------------
(In thousands)                                                 1998            1997
- ---------------------------------------------------------------------------------------
<S>                                                        <C>             <C>         
Deferred tax assets:
     Net operating losses                                  $     25,640    $      5,096
     Accruals not currently deductible                            3,103           2,518
     Bad debts                                                    3,411             800
     Deferred payments under settlement agreement                 6,164            --
     Alternative minimum tax credits                              2,341           3,441
     All other                                                      962             530
                                                           ------------    ------------

         Total deferred tax assets                               41,621          12,385
    Valuation allowance                                          (1,326)         (1,326)
                                                           ------------    ------------

         Net deferred tax assets                           $     40,295    $     11,059
                                                           ------------    ------------

Deferred tax liabilities:
     Accelerated depreciation and amortization             $     21,033    $     21,554
     Inventory costs capitalized for financial reporting            943           2,369
     All other                                                    2,808             730
                                                           ------------    ------------

       Total deferred tax liabilities                            24,784          24,653
                                                           ------------    ------------

       Total net deferred tax  assets (liabilities)        $     15,511    $    (13,594)
                                                           ============    ============
</TABLE>

         Under SFAS No. 109, a valuation allowance must be established to offset
a deferred tax asset if, based on the weight of available evidence, it is more
likely than not that some portion or all of the deferred tax asset will not be
realized. At December 31, 1998 and 1997, the Company recorded a valuation
allowance for state NOLs, generated by a particular subsidiary, that the Company
believes may not be utilized in the future. At December 31, 1998, the Company
has recognized a net deferred tax asset of $15.5 million, the realization of
which is dependent on the Company's ability to generate taxable income in future
periods. The Company believes that its estimate of future earnings based on
contracts in place and its earnings trend from recent prior years supports
recognition of this amount.

         Deferred tax expense includes a decrease (increase) in the valuation
allowance for deferred tax assets of ($1,326,000) and $236,000 for 1997, and
1996, respectively.





                                       57
<PAGE>   58

H.       EQUITY SECURITIES

         The Company has been authorized to issue up to 1,000,000 shares of
Preferred Stock, $.01 par value, none of which are issued or outstanding at
December 31, 1998.

         On May 13, 1998, the stockholders of the Company approved an increase
in the number of authorized shares of common stock to 100,000,000.

         Changes in outstanding Common Stock for the years ended December 31,
1998, 1997, and 1996 were as follows:

<TABLE>
<CAPTION>
- ----------------------------------------------------------------------------------------------------------
(In thousands of shares)                                    1998                   1997            1996
- ----------------------------------------------------------------------------------------------------------
<S>                                                      <C>                     <C>             <C>   
Outstanding, beginning of year                                  65,212              62,758          47,184
Shares issued for acquisitions                                   2,347               1,193               -
Shares issued for deferred compensation plan                       535                  59               -
Other                                                               17                   -               -
Shares issued for public offering                                    -                   -          13,800
Shares issued to settle royalty obligations                          -                   -             434
Shares issued to acquire mat patent rights                           -                   -             276
Shares issued upon exercise of options                             729               1,202           1,064
                                                         -------------           ---------        --------
    Outstanding, end-of-year                                    68,840              65,212          62,758
==========================================================================================================
</TABLE>


I.       EARNINGS PER SHARE

         In accordance with Statement of Financial Accounting Standards No. 128,
"Earnings Per Share" ("SFAS 128"), the Company changed its method of calculating
earnings per share during the fourth quarter of 1997. Per share and weighted
average share amounts for all years presented have been restated to conform to
the requirements of SFAS No. 128, and to give effect for all 1998 and 1997
transactions accounted for as poolings of interest (see Note B).

         The following table presents the reconciliation of the numerator and
denominator for calculating earnings per share in accordance with the disclosure
requirements of SFAS 128 as follows (in thousands, except per share data):

<TABLE>
<CAPTION>
                                                          FOR THE YEARS ENDED
                    ---------------------------------------------------------------------------------------------------------------
                                   1998                                  1997                                  1996
                    --------------------------------        -------------------------------         -------------------------------
                      Income      Shares   Per Share          Income    Shares    Per Share         Income     Shares    Per Share
                      (Num)       (Den)     Amount             (Num)     (Den)     Amount            (Num)      (Den)      Amount
                    ---------    -------   ---------         --------   -------   ---------         -------    -------   ----------
<S>                 <C>           <C>      <C>                <C>        <C>        <C>             <C>         <C>        <C>
BASIC EPS

Income (loss)
available to
common
stockholders        $(63,615)     67,058   $  (0.95)          $37,741    64,158     $ .59           $18,952     53,197     $ .36
                                           ========                                 =====                                  =====

EFFECT OF
DILUTIVE
SECURITIES

Stock options                          -                                  1,472                                  1,759
                                  ------                                 ------                                 ------

DILUTED EPS

Income (loss)
available to
common
stockholders        $(63,615)     67,058   $  (0.95)          $37,741    65,630     $ .58           $18,952     54,956     $ .34
                    ========      ======   ========           =======    ======     =====           =======     ======     =====
</TABLE>






                                       58
<PAGE>   59

         Options excluded from the computation of diluted EPS for the year ended
December 31, 1998 that could potentially dilute basic EPS in the future were
options to purchase 4,435,664 shares. Since the Company incurred a loss per
share for 1998, such dilutive options were excluded, as they would be
antidilutive to basic EPS.

         Options to purchase 12,000 and 16,000 shares of common stock, at
exercise prices of $20.84 and $19.53 per share, respectively, were outstanding
during the fourth quarter of 1997, but were not included in the computation of
diluted EPS because the options' exercise price was greater than the average
market price of the common shares. The options, which expire during the fourth
quarter of 2002, were still outstanding at the end of 1997.

         Options to purchase 40,000 shares of common stock, at an exercise price
of $9.31 per share were outstanding during the fourth quarter of 1996, but were
not included in the computation of diluted EPS because the options exercise
price was greater than the average market price of the common shares. The
options, which expire during the fourth quarter of 2001, were all outstanding at
the end of 1996.

J.      STOCK OPTION PLANS

        At December 31, 1998, the Company had three stock-based compensation
plans, which are described below. The Company applies Accounting Principles
Board Opinion 25 ("APB 25") and related Interpretations in accounting for its
plans. Accordingly, no compensation cost has been recognized for its stock
option plans as the exercise price of all stock options granted thereunder is
equal to the fair value at the date of grant. Had compensation costs for the
Company's stock-based compensation plans been determined based on the fair value
at the grant dates for awards under those plans consistent with the method of
Financial Accounting Standards Board Statement No. 123, the Company's net income
(loss) and earnings (loss) per share would have been reduced to the pro forma
amounts indicated below:

<TABLE>
<CAPTION>
                                                                              Year Ended December 31,
- -----------------------------------------------------------------------------------------------------------------
(In thousands, except per share data)                                 1998              1997               1996
- -----------------------------------------------------------------------------------------------------------------
<S>                                                              <C>                <C>                <C>           
Net income (loss)                           As reported          $    (63,615)      $   37,741         $  18,952
                                            Pro forma                 (68,977)          35,245            17,990



Basic earnings (loss) per share             As reported                 (0.95)            0.59              0.36
                                            Pro forma                   (1.03)            0.55              0.34



Diluted earnings (loss)                     As reported                 (0.95)            0.58              0.34
  per share                                 Pro forma                   (1.03)            0.54              0.33
=================================================================================================================
</TABLE>
        The fair value of each option grant is estimated on the date of grant
using the Black- Scholes option-pricing model, with the following assumptions:

<TABLE>
<CAPTION>

                                                      Years Ended December 31,                 
                                                1998            1997             1996
                                                --------------------------------------  
<S>                                             <C>            <C>              <C> 
Risk free interest rate                           5.2%            6.3%             6.2%

Expected years until exercise                       4               4                4

Expected stock volatility                        56.9%           64.3%            40.8%

Dividend yield                                      0%              0%               0%
</TABLE>





                                       59
<PAGE>   60

        A summary of the status of the Company's stock option plans as of
December 31, 1998, 1997, and 1996 and changes during the periods ending on those
dates is presented below:

<TABLE>
<CAPTION>

                                                                   Years Ended December 31,                                  
- -----------------------------------------------------------------------------------------------------------------------------
                                                1998                          1997                          1996 
- -----------------------------------------------------------------------------------------------------------------------------
                                                        W-A                            W-A                          W-A
                                         Shares    Exercise Price     Shares      Exercise Price    Shares     Exercise Price
                                       ---------   --------------  -----------    --------------   ----------  --------------
<S>                                    <C>          <C>            <C>            <C>              <C>          <C>       
Outstanding at
   beginning of year                   4,070,557    $     7.59       4,110,132    $     4.90        3,980,032    $     3.26
   Granted                             1,254,000         11.35       1,254,000         12.59        1,264,000          8.16
   Exercised                            (726,222)         4.92      (1,153,315)         3.50       (1,066,768)         2.73
   Canceled                             (162,671)        13.45        (140,260)         6.69          (67,132)         3.78
                                       ---------                    ----------                     ----------   


Outstanding at end of year             4,435,664    $     8.02       4,070,557    $     7.59        4,110,132    $     4.90
                                       =========                    ==========                     ========== 

Weighted-average fair
  value of options granted
   during the year                                  $     6.51                    $     6.80                     $     3.28
</TABLE>


         The following table summarizes information about all stock options
outstanding at December 31, 1998.

<TABLE>
<CAPTION>
                                      Options Outstanding                                   Options Exercisable        
                    ------------------------------------------------------------    ------------------------------------- 
   Range of                             Weighted-Average           Weighted-                                 Weighted-
   Exercise             Number              Remaining               Average             Number                Average
   Prices            Outstanding      Contractual Life (Years)    Exercise Price      Exercisable          Exercise Price
- --------------      ------------     -------------------------   ---------------    -------------        ----------------
<S>                 <C>              <C>                         <C>                <C>                  <C>        
$1.72 to $3.81         1,039,106               3.75              $     3.57            1,039,106            $      3.57
$4.02 to $8.28           407,196               5.87                    5.87              119,661                   4.85
$8.31 to $8.31           948,389               4.94                    8.31              610,916                   8.31
$9.31 to $9.94            36,667               5.40                    9.48               13,333                   9.31
$10.00 to $21.00       2,004,306               5.75                   10.59              289,917                  10.00
                     -----------               ----              ----------          -----------            -----------
                       4,435,664               5.12              $     8.02            2,072,933            $      5.98
                     ===========               ====              ==========          ===========            ===========
</TABLE>


     In December 1998 a total of 1,729,306 options, none of which were for the
benefit of executive officers, were amended to reflect a reduction of the
exercise price to $10.00 per share. On the date of the amendment, the price of
Newpark's common stock was $5.63 per share.

     The Amended and Restated Newpark Resources, Inc. 1988 Incentive Stock
Option Plan (the "1988 Plan") was adopted by the Board of Directors on June 22,
1988 and thereafter was approved by the stockholders. The 1988 Plan was amended
several times and provided for approximately 4,000,000 shares to be issuable
thereunder. Under the terms of the 1988 Plan, an option could not be granted for
an exercise price less than the fair market value on the date of grant and could
have a term of up to ten years. No future grants are available under the 1988
Plan

         The 1993 Non-Employee Directors' Stock Option Plan (the "1993
Non-Employee Directors' Plan") was adopted on September 1, 1993 by the Board of
Directors and, thereafter, was approved by the stockholders in 1994.
Non-employee directors are not eligible to participate in any other stock option
or similar plans currently maintained by the Company. The purpose of the 1993
Non-Employee





                                       60
<PAGE>   61

Directors' Plan is to promote an increased incentive and personal interest in
the welfare of Newpark by those individuals who are primarily responsible for
shaping the long-range plans of Newpark, to assist Newpark in attracting and
retaining on the Board persons of exceptional competence and to provide
additional incentives to serve as a director of Newpark.

         Prior to January 29, 1998, the 1993 Non-Employee Directors' Stock
Option Plan (the "Non-Employee Directors' Plan") provided that each non-employee
director who was serving on the Board of Directors on September 1, 1993, and
each new non-employee director who was first elected to the Board of Directors
after September 1, 1993, would be granted a stock option to purchase, at an
exercise price equal to the fair market value of the Common Stock on the date of
grant, 63,000 shares of common stock. The Non-Employee Directors' Plan also
provided that each time a non-employee director had served on the Board for a
period of five consecutive years, such director automatically would be granted a
stock option to purchase 42,000 shares of Common Stock, at an exercise price
equal to the fair market value of the Common Stock on the date of grant.
Effective January 29, 1998, the Non-Employee Directors' Plan was amended to
reduce the number of shares of Common Stock for which a stock option will be
granted to each non-employee director who is first elected a director after that
date from 63,000 shares to 10,000 shares of Common Stock. The Non-Employee
Directors' Plan also was amended to delete the provisions for the automatic
grant of additional stock options at five-year intervals and to provide instead
for automatic additional grants to each Non-Employee Director of stock options
to purchase 10,000 shares of Common Stock on January 29, 1998, and each time the
Non-Employee director is re-elected to the Board of Directors. These amendments
were approved by the stockholders on May 13, 1998.

         On November 2, 1995, the Board of Directors adopted, and on June 12,
1996 the stockholders approved, the Newpark Resources, Inc. 1995 Incentive Stock
Option Plan (the "1995 Plan"), pursuant to which the Compensation Committee may
grant incentive stock options and nonstatutory stock options to designated
employees of Newpark. Initially, a maximum of 2,100,000 shares of Common Stock
were issuable under the 1995 Plan, with such maximum number increasing on the
last business day of each fiscal year of Newpark, commencing with the last
business day of the fiscal year ending December 31, 1996, by a number equal to
1.25% of the number of shares of Common Stock issued and outstanding on the
close of business on such date, with a maximum number of shares of Common Stock
that may be issued upon exercise of options granted under the 1995 Plan being
limited to 5,250,000.

K.       DEFERRED COMPENSATION PLAN

         In March of 1997, the Company established a Long Term Stock and Cash
Incentive Plan (the "Plan"). By policy, the Company has limited participation in
the Plan to certain key employees of companies acquired subsequent to inception
of the Plan. The intent of the Plan is to increase the value of the
stockholders' investment in the Company by improving the Company's performance
and profitability and to retain, attract and motivate key employees who are not
directors or officers of Newpark but whose judgment, initiative and efforts are
expected to contribute to the continued success, growth and profitability of the
Company.

         Subject to the provisions of the Plan, a committee may (i) grant awards
pursuant to the Plan, (ii) determine the number of shares of stock or the amount
of cash or both subject to each award, (iii) determine the terms and conditions
(which need not be identical) of each award, provided that stock shall be issued
without the payment of cash consideration other than an amount equal to the par
value of the stock, (iv) establish and modify performance criteria for awards,
and (v) make all of the determinations necessary or advisable with respect to
awards under the Plan.




                                       61
<PAGE>   62

         Each award under the Plan will consist of a grant of shares of stock or
an amount of cash (to be paid on a deferred basis) subject to a restriction
period (after which the restrictions shall lapse), which shall mean a period
commencing on the date the award is granted and ending on such date as the
committee shall determine (the "Restriction Period"). The committee may provide
for the lapse of restrictions in installments, for acceleration of the lapse of
restrictions upon the satisfaction of such performance or other criteria or upon
the occurrence of such events as the committee shall determine, and for the
early expiration of the Restriction Period upon a participant's death,
disability, retirement at or after normal retirement age or the termination of
the participant's employment with the Company by the Company without cause.

         The maximum number of shares of common stock of Newpark that may be
issued pursuant to the Plan is 676,909, subject to adjustment pursuant to
certain provisions of the Plan. The maximum amount of cash that may be awarded
pursuant to the Plan is $1,500,000, and each such amount may be increased by the
Board of Directors. If shares of stock or the right to receive cash awarded or
issued under the Plan are reacquired by Newpark due to a forfeiture or for any
other reason, such shares or right to receive cash will be cancelled and
thereafter will again be available for purposes of the Plan. At December 31,
1998, 594,234 shares of common stock had been issued under the Plan and
$1,428,000 had been awarded.

L.       SUPPLEMENTAL CASH FLOW INFORMATION

         During 1996, the Company's noncash transactions included the
acquisition of certain patents and exclusivity rights in exchange for 708,728
shares of the Company's common stock and $5,700,000 in cash. In connection with
the purchase of certain of these patents, the Company recorded a deferred tax
liability of $767,000. Transfers from inventory to fixed assets of $4,625,000
were also made during the period. As discussed in Note B, the Company sold and
refinanced $16,000,000 of certain assets in exchange for $7,200,000 of notes
receivable, $1,200,000 in cash and the assumption by the buyer of $7,600,000 in
debt obligations.

         Included in accounts payable and accrued liabilities at December 31,
1998, 1997 and 1996, were equipment purchases of $5,186,000, $3,632,000, and
$1,283,000, respectively. Also included are notes payable for equipment
purchases in the amount of $434,000, $83,000 and $1,397,000 for 1998, 1997, and
1996, respectively.

         Interest of $13,144,000, $4,801,000, and $4,313,000, was paid in 1998,
1997 and 1996, respectively. Income taxes of $9,991,000, $4,751,000, and
$3,186,000 were paid in 1998, 1997 and 1996, respectively.

M.       COMMITMENTS AND CONTINGENCIES

         Newpark and its subsidiaries are involved in litigation and other
claims or assessments on matters arising in the normal course of business. In
the opinion of management, any recovery or liability in these matters will not
have a material adverse effect on Newpark's consolidated financial statements.

         In conjunction with the 1996 acquisition of Campbell Wells Ltd.
("Campbell"), Newpark became a party to a "NOW Disposal Agreement", pursuant to
which Newpark was required, for a period of 25 years following the acquisition,
to deliver to Campbell for disposal at its landfarm facilities an agreed annual
quantity of E&P Waste, and Campbell executed a Noncompetition Agreement under
which it agreed not to compete with Newpark in the marine-related E&P Waste
disposal business for five years.





                                       62
<PAGE>   63

The landfarms are now operated by U.S. Liquids, Inc. ("USL"), which also assumed
Campbell's obligations under the Noncompetition Agreement. During 1998, a
dispute arose between the parties concerning Newpark's obligations under the NOW
Disposal Agreement. In September 1998, Newpark and USL settled their dispute by
executing a Settlement Agreement and a "Payment Agreement" under which, among
other things, Newpark's contractual commitment to deliver waste to USL's
disposal facilities was terminated immediately, and Newpark agreed to pay USL
$30 million, $6 million of which was paid in 1998, $11 million of which is to be
paid in 1999, $9 million of which is to be paid in 2000 and $4 million of which
is to be paid in 2001. The payments to be made in 2000 and 2001 are subject to
increase based on the increase, if any, in the Consumer Price Index between July
1, 1998 and January 3, 2000. Under the Payment Agreement, Newpark has the right,
but not the obligation, to deliver specified volumes of E&P Waste to USL's
facilities until June 30, 2001 without additional cost, and, subject to certain
conditions, Newpark may extend this arrangement for two additional one-year
terms at an additional annual cost of $8 million, which amount is also subject
to increase based on increases in the Consumer Price Index. As part of the
settlement, Newpark agreed that USL may engage in the business of cleaning
tanks, barges, vessels, containers and similar structures used in the
transportation and storage of E&P Waste, and USL purchased from Newpark certain
equipment used by Newpark in such cleaning activities.

         During 1992, the State of Texas assessed additional sales taxes for the
years 1988-1991. The Company has filed a petition for redetermination with the
Comptroller of Public Accounts. The Company believes that the ultimate
resolution of this matter will not have a material adverse effect on its
consolidated financial statements.

         In the normal course of business, in conjunction with its insurance
programs, the Company has established letters of credit in favor of certain
insurance companies in the amount of $1,000,000 and $1,500,000 at December 31,
1998 and 1997, respectively. At December 31, 1998 and 1997, the Company had
outstanding guaranty obligations totaling $1,526,000 and $1,201,000,
respectively, in connection with facility closure bonds issued by an insurance
company.

         Since May 1988, the Company has held the exclusive right to use a
patented prefabricated wooden mat system with respect to the oil and gas
exploration and production industry within the State of Louisiana. On June 20,
1994, the Company entered into a new license agreement by which it obtained the
exclusive right to use the same patented prefabricated mat system, without
industry restriction, throughout the continental United States. The license
agreement requires, among other things, that the Company purchase a minimum of
20,000 mats annually through 2003. The Company has met this annual mat purchase
requirement since the inception of the agreement. Any purchases in excess of
that level may be applied to future annual requirements. The Company's annual
commitment to maintain the agreement in force, absent any excess purchases, is
currently estimated to be $4,600,000. At December 31, 1998, purchases in excess
of prior year commitment levels will significantly mitigate future annual
requirements for the foreseeable future.

         Since July 1995, Newpark has held the exclusive worldwide right to use
a patented composite mat system. Production of these mats did not commence until
1998. The license agreement requires, among other things, that the Company
purchase a minimum of 5,000 mats annually. Any purchases in excess of that level
may be applied to future annual requirements. Newpark's annual commitment to
maintain the agreement in force is currently estimated to be $3,500,000.

         The Company holds the exclusive rights to use two types of patented
processing equipment. In order to maintain these exclusive rights, the Company
is required to purchase a minimum number of units annually. The Company has
exceeded these annual purchase commitments since the inception of




                                       63
<PAGE>   64

the agreements. Any purchases in excess of the annual commitment may be applied
to future commitments. Newpark's annual commitment to maintain these agreements
in force is currently estimated to be $2,600,000. The Company has guaranteed
certain debt obligations of a joint venture in which it holds a 49% interest,
through the issuance of a letter of credit. The guarantee is limited to $15
million, plus accrued interest.

         The Company leases various manufacturing facilities, warehouses, office
space, machinery and equipment, including transportation equipment, under
operating leases with remaining terms ranging from one to ten years, with
various renewal options. Substantially all leases require payment of taxes,
insurance and maintenance costs in addition to rental payments. Total rental
expenses for all operating leases were $10,731,000, $5,993,000, and $5,251,000,
in 1998, 1997 and 1996, respectively.

         Future minimum payments under noncancellable operating leases, with
initial or remaining terms in excess of one year are: $5,715,000 in 1999,
$6,071,000 in 2000, $5,004,000 in 2001 $3,595,000 in 2002, $3,353,000 in 2003
and $12,531,000 thereafter.


N.       CONCENTRATIONS OF CREDIT RISK

         Financial instruments which potentially subject the Company to
significant concentrations of credit risk consist principally of cash
investments and trade accounts and notes receivable.

         The Company maintains cash and cash equivalents with various financial
institutions. These financial institutions are located throughout the Company's
trade area and company policy is designed to limit exposure to any one
institution. As part of the Company's investment strategy, the Company performs
periodic evaluations of the relative credit standing of these financial
institutions.

         Concentrations of credit risk with respect to trade accounts and notes
receivable are generally limited due to the large number of entities comprising
the Company's customer base, and for notes receivable, the required collateral.
The Company maintains an allowance for losses based upon the expected
collectibility of accounts and notes receivable.





                                       64
<PAGE>   65




O.       SUPPLEMENTAL SELECTED QUARTERLY FINANCIAL DATA (UNAUDITED)

<TABLE>
<CAPTION>
                                                                                      Quarter Ended
- ----------------------------------------------------------------------------------------------------------------------
                                                                       Mar 31       Jun 30       Sep 30         Dec 31
                                                                       ------       ------       ------         ------
 (In thousands, except per share amounts)                                                                                  
- ----------------------------------------------------------------------------------------------------------------------
<S>                                                                 <C>          <C>          <C>           <C>       
FISCAL YEAR 1998 (AS PREVIOUSLY REPORTED)
Revenues                                                            $   69,111   $   67,019   $   64,899
Operating income                                                        20,459       20,223      (43,936)
Net income                                                              11,600       11,295      (33,395)
Net income per share
         Basic                                                            0.18         0.17        (0.49)
         Diluted                                                          0.18         0.17        (0.49)

Weighted average common and common equivalent shares outstanding:
         Basic                                                          64,663       66,448       67,605
         Diluted                                                        66,083       67,731       68,071

FISCAL YEAR 1998 (AS RESTATED)
Revenues                                                            $   72,404   $   67,019   $   62,899    $   54,486
Operating income                                                        19,571       16,807      (43,135)      (75,736)
Net income                                                              11,227        9,109      (32,882)      (51,069)
Net income per share
         Basic                                                            0.17         0.14        (0.49)        (0.74)
         Diluted                                                          0.17         0.13        (0.49)        (0.74)

Weighted average common and common equivalent shares outstanding:
         Basic                                                          65,364       66,448       67,605        68,775
         Diluted                                                        66,784       67,731       67,605        68,775

FISCAL YEAR 1997 (AS PREVIOUSLY REPORTED)
Revenues                                                            $   42,915   $   47,959   $   57,908    $   66,572
Operating income                                                        11,953       13,959       16,873        19,693
Net income                                                               7,115        8,269       10,129        11,603
Net income per share
         Basic                                                            0.12         0.13         0.16          0.18
         Diluted                                                          0.11         0.13         0.15          0.18

Weighted average common and common Equivalent shares outstanding:
         Basic                                                          61,265       61,921       63,588        64,041
         Diluted                                                        62,656       63,291       65,122        65,643
FISCAL YEAR 1997 (AS RESTATED)
Revenues                                                            $   47,501   $   52,545   $   62,494    $   70,705
Operating income                                                        12,361       14,367       17,200        20,013
Net income                                                               7,362        8,516       10,196        11,668
Net income per share
         Basic                                                            0.12         0.13         0.16          0.18
         Diluted                                                          0.12         0.13         0.15          0.17

Weighted average common and common equivalent shares outstanding:
         Basic                                                          62,637       63,293       64,906        65,192
         Diluted                                                        64,028       64,653       66,440        66,794
</TABLE>

         The information above has been restated to reflect the effects of all
1998 and 1997 transactions accounted for as poolings of interests. In addition,
1998 quarterly information has been restated to





                                       65
<PAGE>   66

reflect certain adjustments in the Fluids Sales & Engineering segment for
charges that had been capitalized in the first and second quarters and were
later determined to be more appropriately expensed in those quarters and to
reflect a more accurate cut off of certain revenues and expenses between the
third and fourth quarters. The effects of these adjustments were to reduce
reported net income in the first and second quarter by $958,000 and $2,186,000,
respectively and to reduce revenues and increase net income in the third quarter
by $2,000,000 and $513,000, respectively.

         Included in the fourth quarter of 1998 are charges to adjust certain
inventories to physical amounts and to account for differences in gross margins,
primarily in the Fluids Sales & Engineering segment, which were estimated during
the interim periods of 1998. The total of these charges was $4,381,000 and is
included in costs of services provided. In addition, as further discussed in
Note C, during the third and fourth quarters of 1998, the Company recorded
significant charges associated with asset impairments, arbitration settlement,
and increases in the provision for uncollectible accounts.

P.       SEGMENT AND RELATED INFORMATION

         The Company's three business units have separate management teams and
infrastructures that offer different products and services to a homogenous
customer base. The business units form the three reportable segments of E&P
Waste Disposal, Fluids Sales & Engineering and Mat & Integrated Services.

         E&P Waste Disposal: This segment provides disposal services for both
oilfield exploration and production ("E&P") waste and E&P waste contaminated
with naturally occurring radioactive material. The primary method used for
disposal is low pressure injection into environmentally secure geologic
formations deep underground. The primary operations for this segment are in the
Gulf Coast market and customers include major multinational and independent oil
companies. This segment plans to begin expansion into the disposal of
non-hazardous industrial waste in 1999. Disposal of this type of waste could
lead to an expansion of Newpark's customer base and geographic service points
for this segment.

         Fluids Sales & Engineering: This segment provides drilling fluids sales
and engineering services and onsite drilling fluids processing services. The
primary operation for this segment are in the Gulf Coast market, however, other
markets served by this segment include Oklahoma, Canada, Mexico, and the Permian
Basin. Customers include major multinational, independent and national oil
companies.

         Mat & Integrated Services: This segment provides prefabricated
interlocking mat systems for the construction of drilling and work sites. In
addition, the segment provides fully-integrated onsite and offsite environmental
services, including site assessment, pit design, construction and drilling waste
management, and regulatory compliance services. The primary markets served
include the Gulf Coast market, Venezuela and Canada. The principal customers are
major national, independent and national oil companies. In addition, this
segment provides temporary work site services to the pipeline, electrical
utility and highway construction industries principally in the Southeastern
portion of the United States.

         The accounting policies of the reportable segments are the same as
those described in Note A. The Company evaluates the performance of its
operating segments based on income before taxes, accounting changes,
nonrecurring items, and interest income and expense.




                                       66
<PAGE>   67

         Newpark does not believe it is dependent on any one customer. During
the year ended December 31, 1998 there were no sales to one customer in excess
of 10%. During the years ended December 31, 1997 and 1996, one customer
accounted for approximately 10% of total revenues. This customer is a customer
of the Mat & Integrated Services segment. Export sales are not significant.

         Summarized financial information concerning the Company's reportable
segments is shown in the following table. The "other" caption includes
corporate-related items, results of insignificant operations and as it relates
to segment profit (loss), income and expense not allocated to reportable
segments.

<TABLE>
<CAPTION>
                                                                                      Years Ended December 31,    
- --------------------------------------------------------------------------------------------------------------------------
                                                                         1998                1997                1996
                                                                         ----                ----                ----       
                                                                                        (In thousands)
REVENUES (1)

<S>                                                                <C>                  <C>                 <C>                 
E&P Waste Disposal                                                 $   58,457           $    62,681         $   45,106
Fluids Sales & Engineering                                            104,142                69,227             28,201
Mat & Integrated Services                                             111,513               103,216             83,067
Other                                                                      --                    --              1,360
Eliminations                                                          (17,304)               (1,879)            (4,055)
- ----------------------------------------------------------------------------------------------------------------------
   Total Revenues                                                 $   256,808           $   233,245         $  153,679
======================================================================================================================


(1) Segment revenues include the following intersegment transfers:

E&P Waste Disposal                                                $       869           $       380         $      201
Fluids Sales & Engineering                                              1,089                    --                 --
Mat & Integrated Services                                              15,346                 1,499              3,854
- ----------------------------------------------------------------------------------------------------------------------
   Total Intersegment Transfers                                   $    17,304           $     1,879         $    4,055
======================================================================================================================
OPERATING INCOME (LOSS):

Segment Operating Income (Loss)
E&P Waste Disposal                                                $    16,633           $    26,463         $   14,245
Fluids Sales & Engineering                                            (13,961)               12,534                811
Mat & Integrated Services                                               9,342                28,130             21,933
Other                                                                    --                    --                  922
- ----------------------------------------------------------------------------------------------------------------------
   Total Segment Operating Income (Loss)                          $    12,014           $    67,127         $   37,911

General and administrative expenses                                    (4,305)               (3,185)            (2,920)
Provision for uncollectibles                                           (9,180)
Impairment of long-lived assets                                       (52,266)
Arbitration settlement                                                (27,463)
Equity in net loss of unconsolidated affiliate                         (1,293)
Restructure expense                                                      --                    --               (2,432)
- ----------------------------------------------------------------------------------------------------------------------
                   Total Operating Income (Loss)                  $   (82,493)          $    63,942         $   32,559
======================================================================================================================
     
</TABLE>






                                       67
<PAGE>   68


<TABLE>
<CAPTION>
                                                                    December 31
                                                                  ---------------
                                                         1998          1997         1996
                                                     -----------   -----------   -----------
                                                                  (In thousands)
<S>                                                  <C>           <C>           <C>        
SEGMENT ASSETS

E&P Waste Disposal                                   $   156,047   $   149,746   $   130,856
Fluids Sales & Engineering                               166,189        73,793        12,731
Mat & Integrated Services                                136,737       173,303       134,691
Other                                                     45,649        54,781        20,793
- --------------------------------------------------------------------------------------------
- --------------------------------------------------------------------------------------------

   Total Assets                                      $   504,622   $   451,623   $   299,071
============================================================================================

DEPRECIATION & AMORTIZATION

E&P Waste Disposal                                   $     6,258   $     5,371   $     2,899
Fluids Sales & Engineering                                 4,619         1,331           424
Mat & Integrated Services                                 25,822        19,617        13,885
Other                                                         30            74           364
- --------------------------------------------------------------------------------------------
- --------------------------------------------------------------------------------------------
- --------------------------------------------------------------------------------------------
   Total Depreciation & Amortization                 $    36,729   $    26,393   $    17,572
- --------------------------------------------------------------------------------------------
CAPITAL EXPENDITURES

E&P Waste Disposal                                   $    30,621   $    20,816   $     6,845
Fluids Sales & Engineering                                23,211        16,249         2,765
Mat & Integrated Services                                 47,335        42,296        36,857
Other                                                         15           115            33
- --------------------------------------------------------------------------------------------
   Total Capital Expenditures                        $   101,182   $    79,476   $    46,500
- --------------------------------------------------------------------------------------------
</TABLE>





                                       68
<PAGE>   69





         The following table sets forth information about the Company's
operations by geographic area:

<TABLE>
<CAPTION>
                                                        Years Ended December 31,           
                                                -----------------------------------------
                                                   1998           1997           1996
                                                -----------    -----------    -----------
<S>                                             <C>            <C>            <C>        
REVENUE
         Domestic                               $   239,309    $   230,684    $   151,987
         International                               17,499          2,561          1,692
                                                -----------    -----------    -----------
                  Total                         $   256,808    $   233,245    $   153,679
                                                ===========    ===========    ===========

OPERATING INCOME (LOSS)
         Domestic                               $   (84,499)   $    63,949    $    31,387
         International                                2,006             (7)         1,172
                                                -----------    -----------    -----------
                  Total                         $   (82,493)   $    63,942    $    32,559
                                                ===========    ===========    ===========
</TABLE>



<TABLE>
<CAPTION>
                                                              December 31,
                                                ---------------------------------------  
ASSETS                                             1998           1997         1996
- ------                                          -----------   -----------   -----------
<S>                                             <C>           <C>           <C>        
Domestic                                        $   470,998   $   442,117   $   290,661
International                                        33,624         9,506         8,410
                                                -----------   -----------   -----------
         Total                                  $   504,622   $   451,623   $   299,071
                                                ===========   ===========   ===========
</TABLE>






                                       69
<PAGE>   70


ITEM 9. CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND
        FINANCIAL DISCLOSURE

    None











                                       70
<PAGE>   71




                                    PART III

ITEM 10. DIRECTORS AND OFFICERS OF THE REGISTRANT

       The information required by this Item is incorporated by reference to the
registrant's Proxy Statement to be filed pursuant to Regulation 14A under the
Securities Act of 1934 in connection with the Company's 1998 Annual Meeting of
Shareholders.


ITEM 11. EXECUTIVE COMPENSATION

       The information required by this Item is incorporated by reference to the
registrant's Proxy Statement to be filed pursuant to Regulation 14A under the
Securities Act of 1934 in connection with the Company's 1998 Annual Meeting of
Shareholders.


ITEM 12. SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT

       The information required by this Item is incorporated by reference to the
registrant's Proxy Statement to be filed pursuant to Regulation 14A under the
Securities Act of 1934 in connection with the Company's 1998 Annual Meeting of
Shareholders.


ITEM 13. CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS

       The information required by this Item is incorporated by reference to the
registrant's Proxy Statement to be filed pursuant to Regulation 14A under the
Securities Act of 1934 in connection with the Company's 1998 Annual Meeting of
Shareholders.






                                       71
<PAGE>   72


                                   SIGNATURES

         Pursuant to the requirements of Section 13 or 15(d) of the Securities
Exchange Act of 1934, the registrant has duly caused this report to be signed on
its behalf by the undersigned, thereunto duly authorized.

Dated:    March 27, 1999

                                      NEWPARK RESOURCES, INC.


                                      By: /s/ JAMES D. COLE
                                         -------------------------------------
                                         James D. Cole, Chairman of the Board,
                                                  President and Chief Executive
                                                  Officer

         Pursuant to the requirements of the Securities Exchange Act of 1934,
this report has been signed by the following persons on behalf of the registrant
in the capacities and on the date indicated.

<TABLE>
<CAPTION>

    Signatures                                    Title                              Date
    ----------                                    -----                              ----
<S>                                  <C>                                          <C> 

/s/ JAMES D. COLE
- --------------------------------
James D. Cole                        Chairman of the Board, President             March 27, 1999
                                      and Chief Executive Officer


/s/ MATTHEW W. HARDEY
- --------------------------------
Matthew W. Hardey                    Vice President of Finance and                March 27, 1999
                                      Chief Financial Officer


/s/ ERIC M. WINGERTER
- --------------------------------
Eric M. Wingerter                    Controller (Principal                        March 27, 1999
                                      Accounting Officer)


/s/ WM. THOMAS BALLANTINE
- --------------------------------
Wm. Thomas Ballantine                Executive Vice President and                 March 27, 1999
                                      Director

/s/ DIBO ATTAR
- --------------------------------
Dibo Attar*                          Director                                     March 27, 1999


/s/ W. W. GOODSON
- --------------------------------
W. W. Goodson*                       Director                                     March 27, 1999


/s/ DAVID P. HUNT
- --------------------------------
David P. Hunt*                       Director                                     March 27, 1999


/s/ DR. ALAN KAUFMAN
- --------------------------------
Dr. Alan Kaufman*                    Director                                     March 27, 1999


/s/ JAMES H. STONE
- --------------------------------
James H. Stone*                      Director                                     March 27, 1999


/s/ JAMES D. COLE
- --------------------------------
*James D. Cole
  Attorney-in-Fact
</TABLE>





                                       72
<PAGE>   73


                                     PART IV

ITEM 14. EXHIBITS, FINANCIAL STATEMENT SCHEDULES, AND REPORTS ON FORM 8-K

(a)      1.       FINANCIAL STATEMENTS

         Reports of Independent Auditors
         Consolidated Balance Sheets as of December 31, 1998 and 1997
         Consolidated Statements of Income for the years ended December 31,
         1998, 1997 and 1996. Consolidated Statements of Stockholders' Equity
         for the years ended December 31, 1998, 1997 and 1996. Consolidated
         Statement of Cash Flows for the years ended December 31, 1998, 1997 and
         1996. Consolidated Statements of Comprehensive Income for the years
         ended December 31, 1998, 1997 and 1996. Notes to Consolidated Financial
         Statements

         2.       FINANCIAL STATEMENT SCHEDULES

         All schedules for which provision is made in the applicable accounting
         regulations of the Securities and Exchange Commission are not required
         under the related instructions or are inapplicable, and therefore have
         been omitted.

         3.       EXHIBITS

         3.1      Restated Certificate of Incorporation.+

         3.2      Bylaws.(1)

         4.1      Indenture, dated as of December 17, 1997, among the
                  registrant, each of the Guarantors identified therein and
                  State Street Bank and Trust Company, as Trustee.(2)

         4.2      Form of the Newpark Resources, Inc. 8 % Senior Subordinated
                  Notes due 2007, Series B.(2)

         4.3      Form of Guarantees of the Newpark Resources, Inc. 8 % Senior
                  Subordinated Notes due 2007. (2)

         10.1     Employment Agreement, dated as of October 23, 1990, between
                  the registrant and James D. Cole.(1)*

         10.2     Lease Agreement, dated as of May 17, 1990, by and between
                  Harold F. Bean Jr. and Newpark Environmental Services, Inc.
                  ("NESI").(1)

         10.3     Lease Agreement, dated as of July 29, 1994, by and between
                  Harold F. Bean Jr. and NESI.(3)







                                       73
<PAGE>   74




         10.4     Building Lease Agreement, dated April 10, 1992, between the
                  registrant and The Traveler's Insurance Company.(4)

         10.5     Building Lease Agreement, dated May 14, 1992, between State
                  Farm Life Insurance Company, and SOLOCO, Inc.(4)

         10.6     Operating Agreement, dated June 30, 1993, between Goldrus
                  Environmental Services, Inc. and NESI.(3)

         10.7     Amended and Restated 1993 Non-Employee Directors' Stock Option
                  Plan.*+

         10.8     1995 Incentive Stock Option Plan.(5)*

         10.9     Exclusive License Agreement, dated June 20, 1994, between
                  SOLOCO, Inc. and Quality Mat Company.(3)

         10.10    Restated Credit Agreement, dated June 30, 1997, among the
                  registrant, as borrower, the subsidiaries of the registrant
                  named therein, as guarantors, and BankOne, Louisiana, National
                  Association, Deutsche Bank A.G., New York Branch and/or Cayman
                  Islands Branch and Hibernia National Bank, as banks (the
                  "Banks").(6)

         10.11    First Amendment to Restated Credit Agreement, dated November
                  7, 1997, among the registrant, the subsidiaries of the
                  registrant named therein and the Banks.(7)

         10.12    Second Amendment to Restated Credit Agreement, dated December
                  10, 1997, among the registrant, the subsidiaries of the
                  registrant named therein and the Banks.(7)

         10.13    Third, Fourth, Fifth and Sixth Amendment to Restated Credit
                  Agreement, dated December 10, 1997, among the registrant, the
                  subsidiaries of the registrant named therein and the
                  Banks.(7)]+

         10.14    Credit Agreement, dated December 1, 1995, between SOLOCO,
                  Inc., and Hibernia National Bank.(5)

         10.15    Now Disposal Agreement, dated June 4, 1996, among Sanifill,
                  Inc., Now Disposal Operating Co. and Campbell Wells, Ltd.(8)

         10.16    Settlement of Arbitration and Release, dated July 22, 1998,
                  among the registrant and U.S. Liquids, Inc.+

         10.17    Payment Agreement, dated December 31, 1998, among the
                  registrant, Newpark Environmental Services, Inc. and U.S.
                  Liquids, Inc.+

         10.18    Option Agreement, dated December 31, 1998, among the
                  registrant, Newpark Environmental Services, Inc. and U.S.
                  Liquids, Inc.+

         10.19    Asset Purchase Agreement, dated September 16, 1998 among
                  Newpark Environmental Services, Inc. and U.S. Liquids, Inc.+

         10.20    Amendment to Asset Purchase Agreement, dated September 22,
                  1998 among Newpark Environmental Services, Inc. and U.S.
                  Liquids, Inc.+

         10.21    Noncompetition Agreement of September 16, 1998, among the
                  registrant and U.S. Liquids, Inc.+

         10.22    Miscellaneous Agreement, dated September 16, 1998, among the
                  registrant and U.S. Liquids, Inc.+

         10.23    Operating Agreement of The Loma Company L.L.C.+




                                       74
<PAGE>   75




         21.1     Subsidiaries of the Registrant+

         23.1     Consent of Deloitte & Touche LLP+

         24.1     Powers of Attorney+

         27.1     Financial Data Schedule+

         27.2     Restated Financial Data Schedule+
     
         27.3     Restated Financial Data Schedule+

- -------------------------------

+        Filed herewith.

*        Management Compensation Plan or Agreement.

(1)      Previously filed in the exhibits to the registrant's Registration
         Statement on Form S-1 (File No. 33-40716) and incorporated by reference
         herein.

(2)      Previously filed in the exhibits to the registrant's Registration
         Statement on Form S-4 (File No. 333-45197) and incorporated by
         reference herein.

(3)      Previously filed in the exhibits to the registrant's Annual Report on
         Form 10-K for the year ended December 31, 1994, and incorporated by
         reference herein.

(4)      Previously filed in the exhibits to the registrant's Registration
         Statement on Form S-8 (File No. 33-83680) and incorporated by reference
         herein.

(5)      Previously filed in the exhibits to the registrant's Annual Report on
         Form 10-K for the year ended December 31, 1995, and incorporated by
         reference herein.

(6)      Previously filed in the exhibits to the registrant's Quarterly Report
         on Form 10-Q for the quarterly period ended June 30, 1997.

(7)      Previously filed in the exhibits to the registrants Annual Report on
         Form 10-K for the year ended December 31, 1997, and incorporated by
         reference herein.

(8)      Previously filed in the exhibits to the registrant's Registration
         Statement on Form S-3 (File No. 333-05805), and incorporated by
         reference herein.


(b)      REPORTS ON FORM 8-K

         During the last quarter of the period covered by this report, Newpark
filed one report on Form 8-K. In that report, filed October 6, 1998, Newpark
reported, under item 5, that on September 22, 1998, Newpark announced it had
settled the previously disclosed dispute concerning its obligations under the
NOW Disposal Agreement with U.S. Liquids, Inc.






                                       75
<PAGE>   76

                               INDEX TO EXHIBITS

<TABLE>
<CAPTION>

     EXHIBIT
     NO.          DESCRIPTION
     -------      -----------
<S>               <C>                                             
         3.1      Restated Certificate of Incorporation.+

         3.2      Bylaws.(1)

         4.1      Indenture, dated as of December 17, 1997, among the
                  registrant, each of the Guarantors identified therein and
                  State Street Bank and Trust Company, as Trustee.(2)

         4.2      Form of the Newpark Resources, Inc. 8 % Senior Subordinated
                  Notes due 2007, Series B.(2)

         4.3      Form of Guarantees of the Newpark Resources, Inc. 8 % Senior
                  Subordinated Notes due 2007. (2)

         10.1     Employment Agreement, dated as of October 23, 1990, between
                  the registrant and James D. Cole.(1)*

         10.2     Lease Agreement, dated as of May 17, 1990, by and between
                  Harold F. Bean Jr. and Newpark Environmental Services, Inc.
                  ("NESI").(1)

         10.3     Lease Agreement, dated as of July 29, 1994, by and between
                  Harold F. Bean Jr. and NESI.(3)

         10.4     Building Lease Agreement, dated April 10, 1992, between the
                  registrant and The Traveler's Insurance Company.(4)

         10.5     Building Lease Agreement, dated May 14, 1992, between State
                  Farm Life Insurance Company, and SOLOCO, Inc.(4)

         10.6     Operating Agreement, dated June 30, 1993, between Goldrus
                  Environmental Services, Inc. and NESI.(3)

         10.7     Amended and Restated 1993 Non-Employee Directors' Stock Option
                  Plan.*+

         10.8     1995 Incentive Stock Option Plan.(5)*

         10.9     Exclusive License Agreement, dated June 20, 1994, between
                  SOLOCO, Inc. and Quality Mat Company.(3)

         10.10    Restated Credit Agreement, dated June 30, 1997, among the
                  registrant, as borrower, the subsidiaries of the registrant
                  named therein, as guarantors, and BankOne, Louisiana, National
                  Association, Deutsche Bank A.G., New York Branch and/or Cayman
                  Islands Branch and Hibernia National Bank, as banks (the
                  "Banks").(6)

         10.11    First Amendment to Restated Credit Agreement, dated November
                  7, 1997, among the registrant, the subsidiaries of the
                  registrant named therein and the Banks.(7)

         10.12    Second Amendment to Restated Credit Agreement, dated December
                  10, 1997, among the registrant, the subsidiaries of the
                  registrant named therein and the Banks.(7)

         10.13    Third, Fourth, Fifth and Sixth Amendment to Restated Credit
                  Agreement, dated December 10, 1997, among the registrant, the
                  subsidiaries of the registrant named therein and the
                  Banks.(7)]+

         10.14    Credit Agreement, dated December 1, 1995, between SOLOCO,
                  Inc., and Hibernia National Bank.(5)

         10.15    Now Disposal Agreement, dated June 4, 1996, among Sanifill,
                  Inc., Now Disposal Operating Co. and Campbell Wells, Ltd.(8)

         10.16    Settlement of Arbitration and Release, dated July 22, 1998,
                  among the registrant and U.S. Liquids, Inc.+

         10.17    Payment Agreement, dated December 31, 1998, among the
                  registrant, Newpark Environmental Services, Inc. and U.S.
                  Liquids, Inc.+
</TABLE>



<PAGE>   77





         10.18    Option Agreement, dated December 31, 1998, among the
                  registrant, Newpark Environmental Services, Inc. and U.S.
                  Liquids, Inc.+

         10.19    Asset Purchase Agreement, dated September 16, 1998 among
                  Newpark Environmental Services, Inc. and U.S. Liquids, Inc.+

         10.20    Amendment to Asset Purchase Agreement, dated September 22,
                  1998 among Newpark Environmental Services, Inc. and U.S.
                  Liquids, Inc.+

         10.21    Noncompetition Agreement of September 16, 1998, among the
                  registrant and U.S. Liquids, Inc.+

         10.22    Miscellaneous Agreement, dated September 16, 1998, among the
                  registrant and U.S. Liquids, Inc.+

         10.23    Operating Agreement of The Loma Company L.L.C.+

         21.1     Subsidiaries of the Registrant+

         23.1     Consent of Deloitte & Touche LLP+

         24.1     Powers of Attorney+

         27.1     Financial Data Schedule+

         27.2     Restated Financial Data Schedule+

         27.3     Restated Financial Data Schedule+

- -------------------------------

+        Filed herewith.

*        Management Compensation Plan or Agreement.

(1)      Previously filed in the exhibits to the registrant's Registration
         Statement on Form S-1 (File No. 33-40716) and incorporated by reference
         herein.

(2)      Previously filed in the exhibits to the registrant's Registration
         Statement on Form S-4 (File No. 333-45197) and incorporated by
         reference herein.

(3)      Previously filed in the exhibits to the registrant's Annual Report on
         Form 10-K for the year ended December 31, 1994, and incorporated by
         reference herein.

(4)      Previously filed in the exhibits to the registrant's Registration
         Statement on Form S-8 (File No. 33-83680) and incorporated by reference
         herein.

(5)      Previously filed in the exhibits to the registrant's Annual Report on
         Form 10-K for the year ended December 31, 1995, and incorporated by
         reference herein.

(6)      Previously filed in the exhibits to the registrant's Quarterly Report
         on Form 10-Q for the quarterly period ended June 30, 1997.

(7)      Previously filed in the exhibits to the registrants Annual Report on
         Form 10-K for the year ended December 31, 1997, and incorporated by
         reference herein.

(8)      Previously filed in the exhibits to the registrant's Registration
         Statement on Form S-3 (File No. 333-05805), and incorporated by
         reference herein.

<PAGE>   1
                                                                    EXHIBIT 3.1



                      RESTATED CERTIFICATE OF INCORPORATION
                                       OF
                             NEWPARK RESOURCES, INC.



                             PURSUANT TO SECTION 245
             OF THE GENERAL CORPORATION LAW OF THE STATE OF DELAWARE



                      ORIGINAL CERTIFICATE OF INCORPORATION
                        FILED WITH THE SECRETARY OF STATE
                      OF THE STATE OF DELAWARE JUNE 3, 1988



         FIRST: The name of the corporation is:

                             NEWPARK RESOURCES, INC.

         SECOND: The address of the registered office of the corporation in the
State of Delaware is Corporation Trust Center, 1209 Orange Street, in the City
of Wilmington, County of New Castle. The name of its registered agent at that
address is The Corporation Trust Company.

         THIRD: The purpose of the corporation is to engage in any lawful act or
activity for which a corporation may be organized under the General Corporation
Law of the State of Delaware.

         FOURTH: A. The corporation is authorized to issue two classes of shares
to be designated, respectively, "Preferred Stock" and "Common Stock." The total
number of shares which this corporation shall have authority to issue is One
Hundred One Million (101,000,000), of which One Million (1,000,000) shall be
Preferred Stock and One Hundred Million (100,000,000) shall be Common Stock. The
Preferred Stock and the Common Stock shall each have a par value of $.01 per
share.

                 B. The shares of Preferred Stock may be issued from time to
time in one or more series. The Board of Directors is hereby authorized to fix
or alter by resolution the number of shares constituting each such series and
the dividend rights, dividend rate, conversion rights, voting rights, rights and
terms of redemption (including sinking fund provisions), the redemption price or
prices, the liquidation preferences, and all other designations, preferences,
and relative, optional and other special rights, and the qualifications,
limitations and restrictions thereof, of the shares of each wholly unissued
series of Preferred Stock, and to increase or decrease the number of shares of
any series subsequent to the issue of shares of that series, but not below the
number of shares of such series then outstanding. In case the outstanding shares
of 



<PAGE>   2

any series shall be reacquired or the number of shares of any series shall be
decreased, the shares reacquired or the shares constituting such decrease shall
resume the status of authorized but unissued shares which they had prior to the
adoption of the resolution originally fixing the number of shares of such
series.

                 C. Except for and subject to such voting rights as may be
granted to the holders of Preferred Stock from time to time outstanding, the
holders of Common Stock issued and outstanding shall have and possess the
exclusive right to notice of stockholders' meetings and exclusive voting rights
and powers. Subject to all of the rights of Preferred Stock from time to time
outstanding, dividends may be paid on the Common Stock, as and when declared by
the Board of Directors, out of any funds of the corporation legally available
for the payment of such dividends.

                 D. No stockholder of this corporation shall by reason of his
holding shares of any class or series have any preemptive or preferential rights
to purchase or subscribe to any shares of any class or series of this
corporation now or hereafter to be authorized, or any notes, debentures, bonds
or other securities convertible into or carrying options or warrants to purchase
shares of any class or series now or hereafter to be authorized, whether or not
the issuance of any such shares or such notes, debentures, bonds or other
securities would adversely affect the dividend or voting rights of such
stockholder, other than such rights, if any, as the Board of Directors, in its
discretion from time to time, may grant, and at such price as the Board of
Directors, in its discretion, may fix; and the Board of Directors, if otherwise
authorized by the provisions of this Article, may issue shares of any class or
series of this corporation or any notes, debentures, bonds or other securities
convertible into or carrying options or warrants to purchase shares of any class
or series, without offering any such shares of any class or series either in
whole or in part to the existing stockholders of any class or series.

         FIFTH:   The corporation is to have perpetual existence.

         SIXTH:   In furtherance and not in limitation of the powers conferred
by statute, the Board of Directors shall have the power to make, alter, amend
and repeal the Bylaws of the corporation. Elections of directors need not be by
written ballot unless the Bylaws so provide.

         SEVENTH: A. The Board of Directors or stockholders may change the
number of directors from time to time, provided, however, that the number of
directors shall not be increased by more than one (1) within any period of
twelve (12) months unless the increase (by more than one) is approved by the
affirmative vote of two-thirds (2/3) of the authorized number of directors or by
the affirmative vote or written consent of two-thirds (2/3) of the outstanding
shares of each class entitled to vote. A reduction of the authorized number of
directors shall not operate to remove any director prior to the expiration of
such director's term of office.

                 B. No director may be removed from office except for cause, and
except upon the vote or written consent of stockholders representing not less
than two-thirds (2/3) of the issued and outstanding capital stock of each class
then entitled to vote in elections of directors.



<PAGE>   3

                 C. This Article Seventh may not be amended, altered, changed or
repealed except upon the affirmative vote of two-thirds (2/3) of the authorized
number of directors and the affirmative vote or written consent of two-thirds
(2/3) of all outstanding shares of each class entitled to vote.

         EIGHTH: Meetings of stockholders may be held within or without the
State of Delaware, as the Bylaws may provide. The books of the corporation may
be kept (subject to any provision contained in the statutes) outside the State
of Delaware at such place or places as may be designated from time to time by
the Board of Directors or in the Bylaws of the corporation.

         NINTH: This Corporation shall indemnify, to the fullest extent now or
hereafter permitted by applicable law, each of its officers, directors,
employees, and agents who was or is made a party or is threatened to be made a
party to any threatened, pending or completed action, suit or proceeding,
whether civil, criminal, administrative or investigative, by reason of the fact
that he is or was an officer, director, employee or representative of the
corporation, against all expenses (including attorneys' fees and disbursements),
judgments, fines (including excise taxes and penalties) and amounts paid in
settlement actually and reasonably incurred by him in connection with such
action, suit or proceeding.

         TENTH: To the fullest extent permitted by law, as the same exists or as
may hereafter be amended, a director of the corporation shall not be personally
liable to the corporation or its stockholders for monetary damages for breaches
of fiduciary duty as a director. Neither any amendment nor repeal of this
Article Tenth nor the adoption of any provision of this Certificate of
Incorporation inconsistent with this Article Tenth, shall eliminate or reduce
the effect of this Article Tenth in respect of any matter occurring, or any
cause of action, suit or claim that, but for this Article Tenth would accrue or
arise, prior to such amendment, repeal or adoption of an inconsistent provision.

         ELEVENTH: A. The corporation may purchase and maintain insurance on
behalf of any person who is or was a director, officer, employee or agent of the
corporation, or is serving at the request of the corporation as a director,
officer, employee or agent of another corporation, partnership, joint venture,
trust, employee benefit plan or other enterprise against any liability asserted
against him and incurred by him in any such capacity, or arising out of his
status as such, whether or not the corporation would have the power to indemnify
him against such liability under the provisions of law.

                 B. The corporation may create a trust fund, grant a security
interest and/or use other means (including, without limitation, letters of
credit, surety bonds and/or other similar arrangements), as well as enter into
contracts providing indemnification to the full extent authorized or permitted
by law and including as part thereof provisions with respect to any or all of
the foregoing to ensure the payment of such amounts as may become necessary to
effect indemnification as provided therein, or elsewhere.



<PAGE>   4

         TWELFTH:    No "business combination" (as now or hereafter defined in
Section 203 of the Delaware General Corporation Law) shall be subject to Section
203 of the Delaware General Corporation Law.

         THIRTEENTH: The corporation reserves the right to amend, alter, change
or repeal any provision contained in this Certificate of Incorporation, in the
manner now or hereafter prescribed by law, and all rights conferred herein upon
stockholders are granted subject to this reservation.


         I, Eric Wingerter, Vice President, hereby declare and certify that the
foregoing Restated Certificate of Incorporation of Newpark Resources, Inc. was
duly adopted by its Board of Directors in accordance with the provisions of
Section 245 of the General Corporation Law of the State of Delaware; that the
Restated Certificate of Incorporation only restates and integrates and does not
further amend the provisions of the Corporation's Certificate of Incorporation
as heretofore amended or supplemented; and that there is no discrepancy between
such provisions and the provisions of the Restated Certificate of Incorporation.

         IN WITNESS WHEREOF, I have executed this Restated Certificate of
Incorporation this 3rd day of November, 1998.



                                          Newpark Resources, Inc.




                                          By:
                                             --------------------------------
                                              Eric Wingerter, Vice President




<PAGE>   1
                                                                   EXHIBIT 10.7



                             NEWPARK RESOURCES, INC.
                              AMENDED AND RESTATED
                 1993 NON-EMPLOYEE DIRECTORS' STOCK OPTION PLAN
                     (INCLUDING SECOND AMENDMENT ADOPTED BY
                   THE BOARD OF DIRECTORS ON JANUARY 29, 1998)

         1. PURPOSE.

                           This Amended and Restated Newpark Resources, Inc.,
1993 Non-Employee Directors' Stock Option Plan (this "Plan") is intended to
promote the best interests of Newpark Resources, Inc., a Delaware corporation
("Newpark"), and its stockholders by providing to each member of Newpark's Board
of Directors (the "Board") who is a Non-Employee Director (as defined in
paragraph 3 herein) of Newpark with an opportunity to acquire a proprietary
interest in Newpark by receiving options (each a "Stock Option") to purchase
Newpark's common stock, $.01 par value ("Common Stock"), as herein provided. It
is intended that this Plan will promote an increased incentive and personal
interest in the welfare of Newpark by those individuals who are primarily
responsible for shaping the long-range plans of Newpark. In addition, Newpark
seeks both to attract and retain on its Board persons of exceptional competence
and to provide a further incentive to serve as a director of Newpark.

         2. ADMINISTRATION.

                           2.1. This Plan shall be administered by the Board or
by a duly authorized committee of the Board. At such times as the Board is
administering this Plan, all references in this Plan to the "Committee" shall
mean the Board.

                           2.2. In addition to the automatic grants of Stock
Options provided for in paragraph 4 of this Plan, the Committee shall have full
and complete authority, in its discretion: to grant Stock Options to one or more
Non-Employee Directors; to determine the number of Stock Options to be granted
to a Non-Employee Director; to determine the time or times at which Stock
Options shall be granted; to establish the exercise price and the other terms
and conditions upon which Stock Options may be exercised; to remove or adjust
any restrictions and conditions upon Stock Options; to specify, at the time of
grant, provisions relating to the exercisability of Stock Options and to
accelerate or otherwise modify the exercisability of any Stock Options; and to
adopt such rules and regulations and to make all other determinations deemed
necessary or desirable for the administration of this Plan. All interpretations
and constructions of this Plan by the Committee, and all of its actions
hereunder, shall be binding and conclusive on all persons for all purposes.

                           2.3. Newpark shall indemnify and hold harmless each
Committee member and each director of Newpark, and the estate and heirs of such
Committee member or director, against all claims, liabilities, expenses,
penalties, damages or other pecuniary losses, including legal fees, which such
Committee member or director, his or her estate or heirs may suffer as a result
of his or her responsibilities, obligations or duties in connection with this
Plan, to the extent that insurance, if any, does not cover the payment of such
items.

         3. ELIGIBILITY.

                           Each member of the Board who is not an employee or
executive officer of Newpark or any of its Subsidiaries (as herein defined) or
of any parent corporation of Newpark (a "Non-Employee Director") shall be
eligible to be granted Stock Options under this Plan. Eligibility shall be
determined: (i) with respect to each director serving on the Board on the date
this Plan was adopted by the Board (i.e., September 1, 1993) on that date; and
(ii) with respect to each director elected after this Plan was adopted by the
Board, on the date such director is so elected. A Stock Option, once granted to
a Non-Employee



<PAGE>   2

Director, shall remain in effect in accordance with its terms even if the
optionee later enters the employ of Newpark or a Subsidiary or parent.
"Subsidiary" shall mean each corporation which is a "subsidiary corporation" of
Newpark within the definition contained in Section 424(f) of the Internal
Revenue Code of 1986, as amended (the "Code").

         4. GRANTS.

                           4.1. Each Non-Employee Director serving on the Board
on the date the Board adopted this Plan (September 1, 1993) was granted a Stock
Option to purchase 63,000 shares of Common Stock (reflects all adjustments made
pursuant to paragraph 11 of this Plan to and including January 29, 1998). Each
Non-Employee Director who was first elected a director after September 1, 1993
and before January 30, 1998, was granted a Stock Option to purchase 63,000
shares of Common Stock (reflects all adjustments made pursuant to paragraph 11
of this Plan to and including January 29, 1998) automatically on the date of
such election. Each Non-Employee Director who is first elected a director after
January 29, 1998, will be granted a Stock Option to purchase 10,000 shares of
Common Stock automatically on the date of such election.

                           4.2. Subject to stockholder approval of the second
amendment of this Plan (the "Second Amendment"): each Non-Employee Director in
office on January 29, 1998, the date the Second Amendment was approved by the
Board, was granted a Stock Option to purchase 10,000 shares of Common Stock as
of said date; and each Non-Employee Director (whether in office on January 29,
1998, or subsequently elected) shall be granted a Stock Option to purchase
10,000 shares of Common Stock automatically on the date of each annual meeting
of stockholders (or stockholder action in lieu thereof) at which such
Non-Employee Director is re-elected, commencing with the annual meeting in 1998.
If no annual meeting of stockholders (or stockholder action in lieu thereof)
occurs in one or more calendar years, and such Non-Employee Director continues
in office, such Stock Option shall be granted automatically on the anniversary
of the last previous annual meeting of stockholders or stockholder action in
lieu thereof. Subject to stockholder approval of this Second Amendment, the
provisions of this Plan which contemplated automatic grants of Stock Options at
five-year intervals were repealed and replaced with the foregoing provisions of
this paragraph 4.2.

                           4.3. Subject to the provisions of paragraph 11 of
this Plan, the number of shares of Common Stock issued and issuable upon the
exercise of Stock Options granted under this Plan shall not exceed 840,000
(reflects all adjustments made pursuant to paragraph 11 of this Plan to and
including January 29, 1998).

         5. PURCHASE PRICE.

                           The purchase price (the "Exercise Price") of shares
of Common Stock subject to each Stock Option ("Option Shares") granted pursuant
to paragraph 4 shall equal the fair market value ("Fair Market Value") of such
shares on the date of grant (the "Date of Grant") of such Stock Option. The Fair
Market Value of a share of Common Stock on any date shall be equal to the
closing price of the Common Stock for the last preceding day on which Newpark's
shares were traded, and the method for determining the closing price shall be
determined by the Committee. Notwithstanding the foregoing, the Exercise Price
of shares of Common Stock subject to each Stock Option granted at the discretion
of the Committee pursuant to paragraph 2.2 shall be determined by the Committee
in its sole and absolute discretion, and may be less than the fair market value
of the Option Shares on the date of grant, but shall not be less than $1.00 per
share.



<PAGE>   3



         6. OPTION PERIOD.

                           The term of each Stock Option shall commence on the
Date of Grant of the Stock Option and shall be ten years. Subject to the other
provisions of this Plan, (i) each Stock Option granted pursuant to paragraph 4.1
shall be exercisable during its term as to 20% of the Option Shares during the
twelve months beginning on the first anniversary of the Date of Grant; 20% of
the Option Shares during the twelve months beginning on the second anniversary
of the Date of Grant; 20% during the twelve months beginning on the third
anniversary of the Date of Grant; 20% during the twelve months beginning on the
fourth anniversary of the Date of Grant; and 20% during the twelve months
beginning on the fifth anniversary of the Date of Grant; and (ii) each Stock
Option granted pursuant to paragraph 4.2 shall be exercisable during its term as
to one-third of the Option Shares during the twelve months beginning on the
first anniversary of the Date of Grant; one-third of the Option Shares during
the twelve-months beginning on the second anniversary of the date of grant; and
one-third of the Option Shares during the twelve months beginning on the third
anniversary of the date of grant; provided, however, that the Stock Option
granted to each Non-Employee Director pursuant to paragraph 4.1 shall be
exercisable from time to time after the actual Date of Grant as to the number of
Option Shares determined in accordance with the foregoing schedule as if the
Date of Grant were the date such Non-Employee Director first became a director;
provided, further, however, that no Stock Option granted pursuant to paragraph
4.2 shall be exercisable unless and until stockholder approval of the Second
Amendment has been obtained. If an optionee shall not in any period purchase all
of the Option Shares which the optionee is entitled to purchase in such period,
the optionee may purchase all or any part of such Option Shares at any time
after the end of such period and prior to the expiration of the Option.

         7. EXERCISE OF OPTIONS.

                           7.1. Each Stock Option may be exercised in whole or
in part (but not as to fractional shares) by delivering it for surrender or
endorsement to Newpark, attention of the Corporate Secretary, at Newpark's
principal office, together with payment of the Exercise Price and an executed
Notice and Agreement of Exercise in the form prescribed by paragraph 7.2.
Payment may be made in cash, by cashier's or certified check, or by surrender of
previously owned shares of Common Stock valued pursuant to paragraph 5 (if the
Committee authorizes payment in stock).

                           7.2. Exercise of each Stock Option is conditioned
upon the agreement of the Non-Employee Director to the terms and conditions of
this Plan and of such Stock Option as evidenced by the Non-Employee Director's
execution and delivery of a Notice and Agreement of Exercise in a form to be
determined by the Committee in its discretion. Such Notice and Agreement of
Exercise shall set forth the agreement of the Non-Employee Director that: (a) no
Option Shares will be sold or otherwise distributed in violation of the
Securities Act of 1933, as amended (the "Securities Act"), or any other
applicable federal or state securities laws; (b) each Option Share certificate
may be imprinted with legends reflecting any applicable federal and state
securities law restrictions and conditions; (c) Newpark may comply with said
securities law restrictions and issue "stop transfer" instructions to its
Transfer Agent and Registrar without liability; (d) each Non-Employee Director
will furnish to Newpark a copy of each Form 4 or Form 5 filed by said
Non-Employee Director under Section 16(a) of the Securities Exchange Act of
1934, as amended (the "Exchange Act"), and will timely file all reports required
under federal securities laws; and (e) each Non-Employee Director will report
all sales of Option Shares to Newpark in writing on a form prescribed by
Newpark.



<PAGE>   4

                           7.3. No Stock Option shall be exercisable unless and
until any applicable registration or qualification requirements of federal and
state securities laws, and all other legal requirements, have been fully
complied with. Newpark will use reasonable efforts to maintain the effectiveness
of a Registration Statement under the Securities Act for the issuance of Stock
Options and shares acquired thereunder, but there may be times when no such
Registration Statement will be currently effective. The exercise of Stock
Options may be temporarily suspended without liability to Newpark during times
when no such Registration Statement is currently effective, or during times
when, in the reasonable opinion of the Committee, such suspension is necessary
to preclude violation of any requirements of applicable law or regulatory bodies
having jurisdiction over Newpark. If any Stock Option would expire for any
reason except the end of its term during such a suspension, then, if exercise of
such Stock Option is duly tendered before its expiration, such Stock Option
shall be exercisable and exercised (unless the attempted exercise is withdrawn)
as of the first day after the end of such suspension. Newpark shall have no
obligation to file any Registration Statement covering resales of Option Shares.

         8. CONTINUOUS DIRECTORSHIP.

                           Except as provided in paragraph 10 below, a
Non-Employee Director may not exercise a Stock Option unless from the Date of
Grant to the date of exercise such Non-Employee Director continuously serves as
a director of Newpark.

         9. RESTRICTIONS ON TRANSFER.

                           Stock Options granted under this Plan may contain
terms specifically authorized by the Committee, in its sole discretion, which
(i) permit transfer of all or any portion of such Stock Options by an optionee
to (a) the spouse, children (including step-children and adopted children) or
grandchildren of the optionee ("Immediate Family Members"), (b) a trust or
trusts for the exclusive benefit of Immediate Family Members, (c) a corporation,
partnership, limited partnership or limited liability company in which no
persons or entities other than such optionee and Immediate Family Members have
beneficial interests, or (d) such other persons or entities as the Committee may
specifically approve, on a case-by-case basis, and (ii) permit the exercise of
such Stock Options by such transferees. Unless the Committee shall determine
otherwise in its sole discretion, transferred Stock Options may not be further
transferred by the transferees thereof except by will or the laws of descent and
distribution or pursuant to a qualified domestic relations order.
Notwithstanding any transfer permitted in accordance with the foregoing
provisions, transferred Stock Options shall continue to be subject to the same
terms and conditions as were applicable immediately before such transfer (other
than permitting such Stock Options to be exercised by a permitted transferee),
including but not limited to the provisions of this Plan and option agreements
governing (x) the exercise of Stock Options, (y) the termination of Stock
Options at the expiration of their term or following termination of the
directorship of the Non-Employee Director to which the Stock Options were issued
and (z) the payment of withholding taxes. No interest under this Plan of any
Non-Employee Director or transferee shall be subject to attachment, execution,
garnishment, sequestration, the laws of bankruptcy or any other legal or
equitable process. Except as otherwise specifically provided by the Committee in
accordance with this Paragraph 9, each Stock Option granted under this Plan may
not be transferred except by will or the laws of descent and distribution or
pursuant to a qualified domestic relations order and shall be exercisable during
a Non-Employee Director's lifetime only by such Non-Employee Director or by such
Non-Employee Director's legal representative.



<PAGE>   5

         10. TERMINATION OF SERVICE.

                           10.1. Unless otherwise determined by the Committee,
in its sole discretion: upon termination of the directorship of a Non-Employee
Director by reason of death, all outstanding Stock Options to the extent
exercisable on the date of death of the Non-Employee Director shall remain in
full force and effect and may be exercised pursuant to the provisions thereof at
any time prior to expiration at the end of the fixed term thereof; and, upon
termination of the directorship of a Non-Employee Director by reason of
Disability, all outstanding Stock Options to the extent exercisable on the date
of termination of directorship may be exercised pursuant to the provisions
thereof at any time until the earlier of the end of the fixed term thereof and
the expiration of twelve months following termination of the Non-Employee
Director's directorship. Unless otherwise provided by the Committee, all Stock
Options to the extent not presently exercisable by such Non-Employee Director at
the date of death or termination of directorship by reason of Disability, shall
terminate as of the date of death or such termination of directorship and shall
not be exercisable thereafter.

                           10.2. Unless otherwise determined by the Committee,
in its sole discretion, upon the termination of the directorship of a
Non-Employee Director for any reason other than the reasons set forth in
paragraph 10.1, the Stock Option may be exercised during the period of three
months following the date of such termination of directorship, but only to the
extent that such Stock Option was outstanding and exercisable on such date of
termination of directorship. Unless otherwise determined by the Committee, in
its sole discretion, all Stock Options to the extent not then presently
exercisable by such Non-Employee Director shall terminate as of the date of such
termination of directorship and shall not be exercisable thereafter.

                           10.3. For purposes of this Plan, "Disability" shall
mean total and permanent incapacity of a Non- Employee Director, due to physical
impairment or legally established mental incompetence, to perform the usual
duties of a director, which disability shall be determined: (i) on medical
evidence by a licensed physician designated by the Committee, or (ii) on
evidence that the Non-Employee Director has become entitled to receive primary
benefits as a disabled employee under the Social Security Act in effect on the
date of such disability.

         11. ADJUSTMENTS UPON CHANGE IN CAPITALIZATION.

                           11.1. The number and class of shares subject to each
Stock Option outstanding from time to time, the Exercise Price thereof (but not
the total price), the maximum number of Stock Options that may be granted under
this Plan, and the minimum number of shares as to which a Stock Option may be
exercised at any one time, shall be proportionately adjusted in the event of any
increase or decrease in the number of the issued shares of Common Stock which
results from a split-up or consolidation of shares, payment of a stock dividend
or dividends exceeding a total of two and one-half percent (2.5%) for which the
record dates occur in any one fiscal year, a recapitalization (other than the
conversion of convertible securities according to their terms), a combination of
shares or other like capital adjustment (a "Capital Adjustment"), so that upon
exercise of the Stock Option, the Non-Employee Director shall receive the number
and class of shares such Non-Employee Director would have received had such
Non-Employee Director been the holder of the number of shares of Common Stock
for which the Stock Option is being exercised upon the date of such Capital
Adjustment. A similar adjustment shall be made to the number of Option Shares
for which Stock Options shall be granted automatically to Non-Employee Director
after January 29, 1998, as contemplated by paragraph 4 of this Plan, as a result
of any Capital Adjustment occurring after January 29, 1998.

                           11.2. Upon a reorganization, merger or consolidation
of Newpark with one or more corporations as a result of which Newpark is not the
surviving corporation or in which Newpark survives as a subsidiary of another
corporation, or upon a sale of all or substantially all of the property of




<PAGE>   6

Newpark to another corporation, or any dividend or distribution to stockholders
of more than ten percent (10%) of Newpark's assets, adequate adjustment or other
provisions shall be made by Newpark or other party to such transaction so that
there shall remain and/or be substituted for the Option Shares provided for
herein, the shares, securities or assets which would have been issuable or
payable in respect of or in exchange for such Option Shares then remaining, as
if the Non-Employee Director had been the owner of such shares as of the
applicable date. Any securities so substituted shall be subject to similar
successive adjustments.

                           11.3. Subject to paragraph 19, in the event of a
change in control ("Change in Control") of Newpark, all outstanding Stock
Options shall immediately become and shall thereafter be exercisable in full
until expiration at the end of the fixed term thereof or until earlier
terminated in accordance with paragraphs 10 or 16. A Change in Control of
Newpark shall be deemed to have occurred (a) on the date Newpark first has
actual knowledge that any person (as such term is used in Sections 13(d) and
14(d)(2) of the Exchange Act or any amendment or replacement of such sections)
has become the beneficial owner (as defined in Rule 13(d)-3 under the Exchange
Act or any amendment or replacement of such Rule), directly or indirectly, of
securities of the Company representing forty percent (40%) or more of the
combined voting power of Newpark's then outstanding securities or (b) on the
date the stockholders of Newpark approve (i) a merger of Newpark with or into
any other corporation in which Newpark is not the surviving corporation or in
which Newpark survives as a subsidiary of another corporation, (ii) a
consolidation of Newpark with any other corporation, or (iii) the sale or
disposition of all or substantially all of Newpark's assets or a plan of
complete liquidation.

         12. WITHHOLDING TAXES.

                           Newpark shall have the right at the time of exercise
of any Stock Option to make adequate provision for any federal, state, local or
foreign taxes which it believes are or may be required by law to be withheld
with respect to such exercise ("Tax Liability"), to ensure the payment of any
such Tax Liability. Newpark may provide for the payment of any Tax Liability by
any of the following means or a combination of such means, as determined by the
Committee in its sole and absolute discretion in the particular case: (i) by
requiring the Non-Employee Director to tender a cash payment to Newpark, (ii) by
withholding from the Non-Employee Director's cash compensation, (iii) by
withholding from the Option Shares which would otherwise be issuable upon
exercise of the Stock Option that number of Option Shares having an aggregate
fair market value (determined in the manner prescribed by paragraph 5) as of the
date the withholding tax obligation arises in an amount which is equal to the
Non-Employee Director's Tax Liability or (iv) by any other method deemed
appropriate by the Committee. Satisfaction of the Tax Liability of a
Non-Employee Director may be made by the method of payment specified in clause
(iii) above upon the satisfaction of such additional conditions as the Committee
shall deem in its sole and absolute discretion as appropriate in order for such
withholding of Option Shares to qualify for the exemption provided for in
Section 16b-3 of the Exchange Act.

         13. AMENDMENTS AND TERMINATION.

                           The Board of Directors may at any time suspend, amend
or terminate this Plan at any time. No amendment or modification of this Plan
may be adopted, except subject to stockholder approval, which would: (a)
materially increase the benefits accruing to Non-Employee Directors under this
Plan, (b) materially increase the maximum number of Option Shares which may be
issued under this Plan (except for adjustments pursuant to paragraph 11), or (c)
materially modify the requirements as to eligibility for participation in this
Plan.


<PAGE>   7

         14. SUCCESSORS IN INTEREST.

                           The provisions of this Plan and the actions of the
Committee shall be binding upon all heirs, successors and assigns of Newpark and
of Non-Employee Directors.

         15. OTHER DOCUMENTS.

                           All documents prepared, executed or delivered in
connection with this Plan shall be, in substance and form, as established and
modified by the Committee or by persons under its direction and supervision;
provided, however, that all such documents shall be subject in every respect to
the provisions of this Plan, and in the event of any conflict between the terms
of any such document and this Plan, the provisions of this Plan shall prevail.

         16. MISCONDUCT OF A NON-EMPLOYEE DIRECTOR.

                           Notwithstanding any other provision of this Plan, all
unexercised Stock Options held by a Non-Employee Director shall automatically
terminate as of the date his or her directorship is terminated, if such
directorship is terminated on account of any act of fraud, embezzlement,
misappropriation or conversion of assets or opportunities of Newpark, or if the
Non-Employee Director takes any other action materially inimical to the best
interests of Newpark, as determined by the Committee in its sole and absolute
discretion. Upon termination of such Stock Options, such Non-Employee Director
shall forfeit all rights and benefits under this Plan.

         17. TERM OF PLAN.

                           This Plan was adopted by the Board effective as of
September 1, 1993. No Stock Options may be granted under this Plan after August
31, 2003.

         18. GOVERNING LAW.

                           This Plan shall be construed in accordance with, and
governed by, the laws of the State of Delaware.

         19. STOCKHOLDER APPROVAL OF SECOND AMENDMENT.

                           No Stock Option granted pursuant to paragraph 4.2 of
this Plan, as amended by the Second Amendment, shall be exercisable unless and
until the stockholders of Newpark have approved this Plan, as amended by the
Second Amendment, and all other legal requirements have been fully complied
with. If stockholder approval of the Second Amendment is not obtained on or
before January 28, 1999, the Second Amendment shall be null and void and of no
further force or effect, but this Plan, all Stock Options granted hereunder
prior to January 29, 1998, and all provisions of this Plan relating to future
grants of Stock Options shall remain in full force and effect in accordance with
the terms of this Plan, as amended the First Amendment approved by the
stockholders on June 12, 1996.


<PAGE>   8




         20. PRIVILEGES OF STOCK OWNERSHIP.

                           The holder of a Stock Option shall not be entitled to
the privileges of stock ownership as to any shares of Common Stock not actually
issued to such holder.

                           IN WITNESS WHEREOF, this Amended and Restated Plan
been executed as of January 29, 1998.

                                            NEWPARK RESOURCES, INC.


                                            By       
                                              ----------------------------
                                              James D. Cole, President



<PAGE>   1
                                                                  EXHIBIT 10.13

                  THIRD AMENDMENT TO RESTATED CREDIT AGREEMENT

         THIS THIRD AMENDMENT TO RESTATED CREDIT AGREEMENT (hereinafter referred
to as the "Third Amendment") executed as of the 28th day of May, 1998, by and
among NEWPARK RESOURCES, INC., a Delaware corporation ("Borrower"), SOLOCO,
L.L.C., a Louisiana limited liability company ("SOLOCO, L.L.C."), NEWPARK
SHIPHOLDING TEXAS, L.P., a Texas limited partnership ("Newpark Shipholding"),
MALLARD & MALLARD OF LA., INC., a Louisiana corporation ("Mallard"), SOLOCO
TEXAS L.P., a Texas limited partnership ("SOLOCO Texas"), BATSON-MILL, L.P., a
Texas limited partnership ("Batson"), N.I.D., L.P., a Texas limited partnership
("N.I.D."), NEWPARK TEXAS, L.L.C., a Louisiana limited liability company
("Newpark Texas"), NEWPARK HOLDINGS, INC., a Louisiana corporation ("Holdings"),
NEWPARK ENVIRONMENTAL MANAGEMENT COMPANY, L.L.C., a Louisiana limited liability
company ("Environmental L.L.C."), NEWPARK ENVIRONMENTAL SERVICES OF TEXAS L.P.,
a Texas limited partnership ("Environmental L.P."), NEWPARK DRILLING FLUIDS,
INC., a Texas corporation ("Newpark Drilling"), SUPREME CONTRACTORS, INC., a
Louisiana corporation ("Supreme"), EXCALIBAR MINERALS, INC., a Texas corporation
("Excalibar"), EXCALIBAR MINERALS OF LA., L.L.C., a Louisiana limited liability
company ("Excalibar Minerals"), CHEMICAL TECHNOLOGIES, INC., a Texas corporation
("Chemical"), NEWPARK ENVIRONMENTAL SERVICES, INC., a Delaware corporation
("Newpark Services"), NEWPARK TEXAS DRILLING FLUIDS, L.P., a Texas limited
partnership ("Texas Drilling"), NES PERMIAN BASIN, L.P., A Texas limited
partnership ("NES"), BOCKMON CONSTRUCTION COMPANY, INC., a Texas Corporation
("Bockmon") and NEWPARK ENVIRONMENTAL SERVICES MISSISSIPPI, L.P., a Mississippi
limited partnership ("Mississippi") (SOLOCO, L.L.C., Newpark Shipholding,
Mallard, SOLOCO Texas, Batson, N.I.D., Newpark Texas, Holdings, Environmental
L.L.C., Environmental L.P., Newpark Drilling, Supreme, Excalibar, Excalibar
Minerals, Chemical, Newpark Services, Texas Drilling, NES, Bockmon and
Mississippi are herein collectively referred to as the "Guarantors", and
individually, "Guarantor"), BANK ONE, LOUISIANA, NATIONAL ASSOCIATION, a
national banking association ("Bank One"), DEUTSCHE BANK A.G., NEW YORK BRANCH
AND/OR CAYMAN ISLANDS BRANCH ("Deutsche"), HIBERNIA NATIONAL BANK, a national
banking association ("Hibernia") and each of the financial institutions which is
a party hereto (as evidenced by the signature pages to this Third Amendment) or
which may from time to time become a party hereto or any successor or assignee
thereof (hereinafter collectively referred to as "Banks", and individually,
"Bank") and Bank One, as Administrative and Syndication Agent ("Agent") and
Deutsche as Documentation Agent ("Co-Agent").

                              W I T N E S S E T H:

         WHEREAS, Borrower, certain of the Guarantors, Bank One and Hibernia
entered into a Credit Agreement dated as of June 29, 1995 under the terms of
which Bank One and Hibernia agreed to provide Borrower with a revolving loan
facility in amounts of up to $25,000,000.00 and a term loan facility in amounts
of up to $25,000,000.00; and

         WHEREAS, as of June 30, 1997 the Borrower, the Guarantors, the Agent,
the Co-Agent and the Banks entered into a Restated Credit Agreement to
consolidate all outstanding loan facilities into one facility in a maximum
amount of $90,000,000 (the Restated Credit Agreement is hereinafter referred to
as the "Credit Agreement"); and

         WHEREAS, as of November 7, 1997, the Borrower, the Guarantors, the
Agent, the Co-Agent and the Banks entered into a First Amendment to Restated
Credit Agreement (the "First Amendment"); and

         WHEREAS, as of December 10, 1997, the Borrower, the Guarantors, the
Agent, the Co-Agent and the Banks entered into a Second Amendment to Restated
Credit Agreement (the "Second Amendment"); and

         WHEREAS, the Borrower has requested that the Banks make certain
additional amendments to the Credit Agreement and the Agent, the Co-Agent and
the Banks are willing to make such additional amendments.

         NOW, THEREFORE, the parties hereto agree as follows:



<PAGE>   2


         . Unless otherwise defined herein, all defined terms used herein shall
have the same meaning ascribed to such terms in the Credit Agreement.

         . Section 1 of the Credit Agreement is hereby amended by the addition
of the following new definitions thereto:

                  "Reimbursement Agreement" means that certain Reimbursement
         Agreement dated as of May 1, 1998, by and among Borrower, The Loma
         Company, L.L.C. and Bank One.

                  "Loma Letter of Credit" means that certain Irrevocable Letter
         of Credit dated May 28, 1998 from Bank One to Bank One Trust Company,
         N.A., as Trustee, issued at the request of and for the account of
         Borrower in the stated amount of $15,187,500.00.

                  . Section 2 of the Credit Agreement is hereby amended in the
         following respects:

         (a) by replacing the phrase "Five Million Dollars ($5,000,000.00)" 
    with the phrase "Twenty Million Dollars ($20,000,000.00)" everywhere it 
    appears in such Section; and

         (b) by adding the following sentence to the end of Section 2(d):

                  "In addition to the above stated amounts, Borrower agrees to
         pay Agent for the benefit of the Banks an additional commission of
         one-eighth of one percent (.125%) per annum (based upon the actual days
         elapsed in a year consisting of 365, or, if appropriate, 366 days) on
         the amount of the Loma Letter of Credit.


         . Subsection (vii) of Section 12(h) of the Credit Agreement is hereby
deleted in its entirety and the following inserted in lieu thereof:

                  (vii)   indebtedness evidenced by the Reimbursement Agreement;
           or

         . This Third Amendment shall be effective as of the date first above
written, but only upon satisfaction of the conditions precedent set forth in
Paragraph 6 hereto.

         . The obligations of Banks under this Third Amendment shall be subject
to the satisfaction of the following conditions precedent:

         () Execution and Delivery. The Borrower shall have executed and
    delivered this Third Amendment and other required documents, all in form and
    substance satisfactory to the Banks;

         () Guarantors' Execution and Delivery. The Guarantors shall have
    executed and delivered this Third Amendment and other required documents,
    all in form and substance satisfactory to the Banks;

         () Corporate Resolutions. Banks shall have received appropriate
    certified corporate resolutions of each of the Borrower and each of the
    Guarantors;

         () Good Standing and Existence. The Banks shall have received evidence
    of existence and good standing for Borrower and each of the Guarantors;

         () Reimbursement Agreement. The transactions described in the
    Reimbursement Agreement shall have closed and been funded.

         () Representations and Warranties. The representations and warranties
    of Borrower under the Credit Agreement are true and correct in all material
    respects as of such date, as if then made (except to the extent that such
    representations and warranties related solely to an earlier date);



<PAGE>   3

         () No Event of Default. No Event of Default shall have occurred and be
    continuing nor shall any event have occurred or failed to occur which, with
    the passage of time or service of notice, or both, would constitute an Event
    of Default;

         () Other Documents. Each Bank shall have received such other
    instruments and documents incidental and appropriate to the transaction
    provided for herein as such Bank or its counsel may reasonably request, and
    all such documents shall be in form and substance satisfactory to such Bank;
    and

         () Legal Matters Satisfactory. All legal matters incident to the
    consummation of the transactions contemplated hereby shall be satisfactory
    to special counsel for Bank retained at the expense of Borrower.

         . Except to the extent its provisions are specifically amended,
modified or superseded by this Third Amendment, the representations, warranties
and affirmative and negative covenants of the Borrower contained in the Credit
Agreement are incorporated herein by reference for all purposes as if copied
herein in full. The Borrower hereby restates and reaffirms each and every term
and provision of the Credit Agreement, as amended, including, without
limitation, all representations, warranties and affirmative and negative
covenants. Except to the extent its provisions are specifically amended,
modified or superseded by this Third Amendment, the Credit Agreement, as
amended, and all terms and provisions thereof shall remain in full force and
effect, and the same in all respects are confirmed and approved by the Borrower
and the Banks.

         . Pursuant to the Second Amendment and that certain Continuing Guaranty
dated December 10, 1997 (the "Newpark Mississippi Guaranty"), Newpark
Environmental Services Mississippi, L.P., a Mississippi limited partnership
("Newpark Mississippi") became a Guarantor under the Credit Agreement. The
Newpark Mississippi Guaranty incorrectly referred to Newpark Mississippi as
"Newpark Environmental Services of Mississippi, L.P." The parties hereto agree
that any reference to "Newpark Environmental Services of Mississippi, L.P." in
the Newpark Mississippi Guaranty or any other Loan Document shall be a reference
to "Newpark Environmental Services Mississippi, L.P."

         9. The parties hereto agree that the Loma Letter of Credit is a "Letter
of Credit" issued under the Credit Agreement.

         10. This Third Amendment may be executed in any number of counterparts
and all of such counterparts taken together shall be deemed to constitute one
and the same instrument.

         IN WITNESS WHEREOF, the parties have caused this Third Amendment to
Restated Credit Agreement to be duly executed as of the date first above
written.

                                    BORROWER:

                                    NEWPARK RESOURCES, INC.
                                    a Delaware corporation


                                    By:      
                                       -------------------------------------
                                       John R. Dardenne, Sr., Treasurer

                                    GUARANTORS:

                                    CHEMICAL TECHNOLOGIES, INC.,
                                    EXCALIBAR MINERALS, INC., NEWPARK
                                    ENVIRONMENTAL SERVICES, INC.,
                                    MALLARD & MALLARD OF LA., INC.,
                                    NEWPARK HOLDINGS, INC., NEWPARK DRILLING
                                    FLUIDS, INC., SUPREME CONTRACTORS, INC.,
                                    AND BOCKMON CONSTRUCTION COMPANY, INC.


                                    By:      
                                       -------------------------------------
                                       John R. Dardenne, Sr., Treasurer


<PAGE>   4

                                    NEWPARK ENVIRONMENTAL MANAGEMENT
                                    COMPANY, L.L.C., NEWPARK TEXAS,
                                    L.L.C., EXCALIBAR MINERALS OF LA.,L.L.C.
                                    AND SOLOCO L.L.C.


                                    By:      
                                       -------------------------------------
                                       John R. Dardenne, Sr., Treasurer



                                    BATSON-MILL, L.P., NEWPARK TEXAS DRILLING,
                                    FLUIDS L.P., NEWPARK ENVIRONMENTAL
                                    SERVICES OF TEXAS, L.P., NEWPARK
                                    SHIPHOLDING TEXAS, L.P., N.I.D., L.P.,
                                    SOLOCO TEXAS, L.P., NES PERMIAN BASIN, L.P.
                                    AND NEWPARK ENVIRONMENTAL SERVICES
                                    MISSISSIPPI, L.P.

                                    By:  Newpark Holdings, Inc., the general
                                         partner of each


                                    By:      
                                       -------------------------------------
                                       John R. Dardenne, Sr., Treasurer



                                    BANKS:

                                    BANK ONE, LOUISIANA,
                                    NATIONAL ASSOCIATION,
                                    a national banking association


                                    By:      
                                       -------------------------------------
                                       Rose M. Miller, Vice President


                                    DEUTSCHE BANK A.G., NEW YORK BRANCH
                                    AND/OR CAYMAN ISLANDS BRANCH


                                    By:      
                                       -------------------------------------
                                    Name:    
                                         -----------------------------------
                                    Title:   
                                          ----------------------------------

                                    By:      
                                       -------------------------------------
                                    Name:    
                                         -----------------------------------
                                    Title:   
                                          ----------------------------------



                                    HIBERNIA NATIONAL BANK


                                    By:      
                                       -------------------------------------
                                    Name:    
                                         -----------------------------------
                                    Title:   
                                          ----------------------------------





<PAGE>   5

                                    AGENT:


                                    BANK ONE, LOUISIANA,
                                    NATIONAL ASSOCIATION,
                                    a national banking association


                                    By:      
                                       -------------------------------------
                                       Rose M. Miller, Vice President

                                    CO-AGENT:

                                    DEUTSCHE BANK A.G., NEW YORK BRANCH
                                    AND/OR CAYMAN ISLANDS BRANCH


                                    By:      
                                       -------------------------------------
                                    Name:    
                                         -----------------------------------
                                    Title:   
                                          ----------------------------------


                                    By:      
                                       -------------------------------------
                                    Name:    
                                         -----------------------------------
                                    Title:   
                                          ----------------------------------
<PAGE>   6
                 FOURTH AMENDMENT TO RESTATED CREDIT AGREEMENT


         THIS FOURTH AMENDMENT TO RESTATED CREDIT AGREEMENT (hereinafter
referred to as the "Fourth Amendment") executed as of the 30th day of September,
1998, by and among NEWPARK RESOURCES, INC., a Delaware corporation ("Borrower"),
SOLOCO, L.L.C., a Louisiana limited liability company ("SOLOCO, L.L.C."),
NEWPARK SHIPHOLDING TEXAS, L.P., a Texas limited partnership ("Newpark
Shipholding"), MALLARD & MALLARD OF LA., INC., a Louisiana corporation
("Mallard"), SOLOCO TEXAS L.P., a Texas limited partnership ("SOLOCO Texas"),
BATSON-MILL, L.P., a Texas limited partnership ("Batson"), N.I.D., L.P., a Texas
limited partnership ("N.I.D."), NEWPARK TEXAS, L.L.C., a Louisiana limited
liability company ("Newpark Texas"), NEWPARK HOLDINGS, INC., a Louisiana
corporation ("Holdings"), NEWPARK ENVIRONMENTAL MANAGEMENT COMPANY, L.L.C., a
Louisiana limited liability company ("Environmental L.L.C."), NEWPARK
ENVIRONMENTAL SERVICES OF TEXAS L.P., a Texas limited partnership
("Environmental L.P."), NEWPARK DRILLING FLUIDS, INC., a Texas corporation
("Newpark Drilling"), SUPREME CONTRACTORS, INC., a Louisiana corporation
("Supreme"), EXCALIBAR MINERALS, INC., a Texas corporation ("Excalibar"),
EXCALIBAR MINERALS OF LA., L.L.C., a Louisiana limited liability company
("Excalibar Minerals"), CHEMICAL TECHNOLOGIES, INC., a Texas corporation
("Chemical"), NEWPARK ENVIRONMENTAL SERVICES, INC., a Delaware corporation
("Newpark Services"), NEWPARK TEXAS DRILLING FLUIDS, L.P., a Texas limited
partnership ("Texas Drilling"), NES PERMIAN BASIN, L.P., A Texas limited
partnership ("NES"), BOCKMON CONSTRUCTION COMPANY, INC., a Texas Corporation
("Bockmon"), NEWPARK ENVIRONMENTAL SERVICES MISSISSIPPI, L.P., a Mississippi
limited partnership ("Mississippi"), NDF MEXICO, INC., a Texas corporation
("Mexico") (SOLOCO, L.L.C., Newpark Shipholding, Mallard, SOLOCO Texas, Batson,
N.I.D., Newpark Texas, Holdings, Environmental L.L.C., Environmental L.P.,
Newpark Drilling, Supreme, Excalibar, Excalibar Minerals, Chemical, Newpark
Services, Texas Drilling, NES, Bockmon, Mississippi and Mexico are herein
collectively referred to as the "Guarantors", and individually, "Guarantor"),
BANK ONE, LOUISIANA, NATIONAL ASSOCIATION, a national banking association ("Bank
One"), DEUTSCHE BANK A.G., NEW YORK BRANCH AND/OR CAYMAN ISLANDS BRANCH
("Deutsche"), HIBERNIA NATIONAL BANK, a national banking association
("Hibernia") and each of the financial institutions which is a party hereto (as
evidenced by the signature pages to this Fourth Amendment) or which may from
time to time become a party hereto or any successor or assignee thereof
(hereinafter collectively referred to as "Banks", and individually, "Bank") and
Bank One, as Administrative and Syndication Agent ("Agent") and Deutsche as
Documentation Agent ("Co-Agent").

                              W I T N E S S E T H:

         WHEREAS, Borrower, certain of the Guarantors, Bank One and Hibernia
entered into a Credit Agreement dated as of June 29, 1995 under the terms of
which Bank One and Hibernia agreed to provide Borrower with a revolving loan
facility in amounts of up to $25,000,000.00 and a term loan facility in amounts
of up to $25,000,000.00; and

         WHEREAS, as of June 30, 1997 the Borrower, the Guarantors, the Agent,
the Co-Agent and the Banks entered into a Restated Credit Agreement to
consolidate all outstanding loan facilities into one facility in a maximum
amount of $90,000,000 (the Restated Credit Agreement is hereinafter referred to
as the "Credit Agreement"); and

         WHEREAS, as of November 7, 1997, the Borrower, the Guarantors, the
Agent, the Co-Agent and the Banks entered into a First Amendment to Restated
Credit Agreement (the "First Amendment"); and

         WHEREAS, as of December 10, 1997, the Borrower, the Guarantors, the
Agent, the Co- Agent and the Banks entered into a Second Amendment to Restated
Credit Agreement (the "Second Amendment"); and

         WHEREAS, as of May 28, 1998, the Borrower, the Guarantors, the Agent,
the Co-Agent and the Banks entered into a Third Amendment to Restated Credit
Agreement (the "Third Amendment"); and



<PAGE>   7

         WHEREAS, the Borrower has requested that the Banks make certain
additional amendments to the Credit Agreement and the Agent, the Co-Agent and
the Banks are willing to make such additional amendments.

         NOW, THEREFORE, the parties hereto agree as follows:

         . Unless otherwise defined herein, all defined terms used herein shall
have the same meaning ascribed to such terms in the Credit Agreement.

         . Section 1 of the Credit Agreement is hereby amended in the following
respects:

         () By deleting the definition of "Maturity Date" and substituting the
    following in lieu thereof :

                           "Maturity Date" shall mean June 30, 2001";

         () By deleting the definition of "Revolving Commitment" and
    substituting the following in lieu thereof:

                           "Revolving Commitment" shall mean (A) for all Banks,
                  $100,000,000 as reduced from time to time pursuant to Sections
                  2(e) and 8(b) hereof and (B) as to any Bank, its obligation to
                  make Advances hereunder on the Revolving Loans and purchase
                  participations in Letters of Credit issued hereunder by the
                  Agent in amounts not exceeding, in the aggregate, the amount
                  set forth opposite the name of such Bank on the signature
                  pages hereto under the heading "Revolving Commitment" or in
                  its Assignment and Acceptance."

         () By deleting the definition of "Interest Payment Date" and
    substituting the following in lieu thereof:

                           "Interest Payment Date" shall mean (i) with respect
                  to Eurodollar Loan, the last day of each Interest Period or
                  (ii) with respect to Base Rate Loans, the last day of each
                  calendar month, or (iii) with respect to Euro-Canadian Loans,
                  the earlier of (A) the last day of each Interest Period or (B)
                  the last day of each calendar month.

         () By deleting the definition of "Interest Period" and substituting the
    following in lieu thereof:

                           "Interest Period" shall mean any Base Rate Interest
                  Period, Eurodollar Interest Period or Euro-Canadian Interest
                  Period.

         () By deleting the definition of "Tranches" and substituting the
    following in lieu thereof:

                           "Tranches" shall mean Eurodollar Loans, Euro-Canadian
                  Loans or Base Rate Loans.

         () By the addition of the following new definitions:

                           "Asset Write-Down" shall mean the write-down by
                  Borrower of the value of its wooden mat inventory and other
                  assets and a contract settlement, such write-down not to
                  exceed $70,000,000 after tax without the consent of the Banks.

                           "Euro-Canadian Business Day" shall mean a business
                  day in which dealings in Canadian dollars are carried on in
                  Canada.


<PAGE>   8

                           "Euro-Canadian Interest Period" shall mean with
                  respect to any Euro-Canadian Loan (i) initially, the period
                  commencing on the date such Euro-Canadian Loan is made and
                  ending one (1), two (2) or three (3) months thereafter as
                  selected by Borrower pursuant to Section 4(a)(iii), and (ii)
                  thereafter, each period commencing on the day following the
                  last day of the next preceding Interest Period applicable to
                  such Euro-Canadian Loan and ending one (1), two (2) or three
                  (3) months thereafter, as selected by Borrower pursuant to
                  Section 4(a)(iii); provided, however, that (a) if any
                  Euro-Canadian Interest Period would otherwise expire on a day
                  which is not a Euro-Canadian Business Day, such Interest
                  Period shall expire on the next succeeding Euro-Canadian
                  Business Day unless the result of such extension would be to
                  extend such Interest Period into the next calendar month, in
                  which case such Interest Period shall end on the immediately
                  preceding Euro-Canadian Business Day, (b) if any Euro-Canadian
                  Interest Period begins on the last Euro-Canadian Business Day
                  of a calendar month (or on a day for which there is no
                  numerically corresponding day in the calendar month at the end
                  of such Interest Period) such Interest Period shall end on the
                  last Euro-Canadian Business Day of a calendar month, and (c)
                  any Euro-Canadian Interest Period which would otherwise expire
                  after the Maturity Date shall end on such Maturity Date.

                           "Euro-Canadian Loans" shall mean any loan during any
                  period which is funded in Canadian Dollars and bears interest
                  at the Euro-Canadian Rate, or which would bear interest at
                  such rate if the Maximum Rate ceiling was not in effect at a
                  particular time.

                           "Euro-Canadian Margin" shall mean, with respect to
                  each Euro-Canadian Loan:

                                    (i) two percent (2%) per annum whenever the
                           Borrower's ratio of Consolidated Funded Debt to
                           Consolidated EBITDA is equal to or greater than 1.75
                           to 1.0; or

                                    (ii) one and three-fourths percent (1.75%)
                           per annum whenever Borrower's ratio of Consolidated
                           Funded Debt to Consolidated EBITDA is equal to or
                           greater than 1.5 to 1.0 but less than 1.75 to 1.0; or

                                    (iii) one and one-half percent (1.50%) per
                           annum whenever Borrower's ratio of Consolidated
                           Funded Debt to Consolidated EBITDA is equal to or
                           greater than 1.25 to 1.0 but less than 1.5 to 1.0; or

                                    (iv) one and one-quarter percent (1.25%) per
                           annum whenever Borrower's ratio of Consolidated
                           Funded Debt to Consolidated EBITDA is equal to or
                           greater than 1.0 to 1.0 but less than 1.25 to 1.0; or

                                    (v) one percent (1%) per annum whenever
                           Borrower's ratio of Consolidated Funded Debt to
                           Consolidated EBITDA is less than 1.0 to 1.0.

                  The Euro-Canadian Margin shall be determined at the end of
                  each fiscal quarter of Borrower and calculated on a trailing
                  four quarter basis and shall immediately apply to each
                  existing and new Tranche.

                           "Euro-Canadian Rate" shall mean the market rate of
                  interest per annum (rounded upward, if necessary to the
                  nearest 1/6 of 1%) for Canadian Dollar deposits offered
                  outside of Canada, as such rates are reported by Reuters New
                  Service two (2) Euro-Canadian Business Days prior to the first
                  date of each Euro-Canadian Interest Period. Provided, 

<PAGE>   9

                  however, that if such rate is not available from Reuters News
                  Service then such market interest rate shall be otherwise
                  independently obtained by Agent from an alternate,
                  substantially similar independent source available to Agent or
                  shall be calculated by Agent by substantially similar
                  methodology as that theretofore used to determine such market
                  rate in Reuters News Service.

         . Section 2 of the Credit Agreement is hereby amended in the following
respects:

         () By deleting Subsection 2(b) thereof in its entirety and substituting
    the following in lieu thereof:

                           "(b) Procedure for Borrowing. Whenever Borrower
                  desires an Advance hereunder, it shall give Agent telegraphic,
                  telex, facsimile or telephonic notice ("Notice of Borrowing")
                  of such requested Advance, which in the case of telephonic
                  notice, shall be promptly confirmed in writing. Each Notice of
                  Borrowing shall be in the form of Exhibit "A" attached hereto
                  and shall be received by Agent not later than 11:00 a.m.
                  Lafayette, Louisiana time, (i) one Business Day prior to the
                  date upon which any such Advance is requested to be funded
                  (the "Borrowing Date") in the case of the Base Rate Loan, or
                  (ii) three (3) Eurodollar Business Days prior to any proposed
                  Borrowing Date in the case of Eurodollar Loans or (iii) three
                  (3) Euro-Canadian Business Days prior to any proposed
                  Borrowing Date in the case of Euro-Canadian Loans. Upon
                  receipt of such Notice, Agent shall advise each Bank thereof;
                  provided, that if the Banks have received at least one (1)
                  Business Day's notice of such Advance prior to funding of a
                  Base Rate Loan, at least two (2) Eurodollar Business Days'
                  notice of each Advance prior to funding in the case of a
                  Eurodollar Loan or at least two (2) Euro-Canadian Business
                  Days' notice of each Advance prior to the funding in the case
                  of a Euro-Canadian Loan, each Bank shall (i) in the case of
                  Base Rate Loans or Eurodollar Loans, provide Agent at its
                  office at 200 W. Congress, Lafayette, Louisiana 70502, not
                  later than 1:00 p.m., Lafayette, Louisiana time, on the
                  Borrowing Date, in immediately available funds, its Pro Rata
                  Part of the requested Advance or (ii) in the case of
                  Euro-Canadian Loans provide Agent at Toronto Dominion Bank,
                  Swift Code TDOMCATT, Bank One International Corp., Acct. No.
                  0360-01-2226951, Reference Newpark Resources, Inc. no later
                  than 1:00 p.m. Lafayette, Louisiana time on the Borrowing
                  Date, in immediately available funds, its Pro Rata Part of the
                  requested Advance, but the aggregate of all such fundings by
                  each Bank shall never exceed such Bank's Revolving Commitment.
                  Not later than 2:00 p.m., Lafayette, Louisiana time, on the
                  Borrowing Date, Agent shall make available to Borrower at the
                  same office, in like funds, the aggregate amount of such
                  requested Advance. Neither Agent nor any Bank shall incur any
                  liability to Borrower in acting upon any Notice of Borrowing
                  referred to above which Agent or such Bank believes in good
                  faith to have been given by a duly authorized officer or other
                  person authorized to borrow on behalf of Borrower or for
                  otherwise acting in good faith under this Section 2(b). Upon
                  funding of Advances by Banks in accordance with this
                  Agreement, pursuant to any such Notice of Borrowing, Borrower
                  shall have effected Advances hereunder.

         () By the addition of a new Subsection 2(g) thereto as follows:

                           "(g) Euro-Canadian Loans. On the terms and conditions
                  hereinafter set forth, the Banks agree to make Advances to
                  Borrower in the form of Euro-Canadian Loans from time to time
                  during the period beginning on the Fourth Amendment Effective
                  Date and ending on the Maturity Date in such amounts as the
                  Borrower may request up to an amount not to exceed, in the
                  aggregate principal amount outstanding at any time, the sum of
                  $10,000,000 in U.S. Dollars. All Advances on Euro-Canadian
                  Loans shall be made by the Banks in Canadian dollars and all


<PAGE>   10

                  repayments of such Advances shall be made in Canadian dollars.
                  Each Advance as a Euro-Canadian Loan shall be in an amount
                  equivalent to at least $500,000 U.S. Dollars or whole
                  multiples of $100,000 U.S. Dollars in excess thereof. All such
                  Advances made as Euro-Canadian Loans shall be Advances on the
                  Revolving Commitment. The amount and the date of each such
                  Advance shall be designated by Borrower in a Notice of
                  Borrowing delivered to Agent not later than 11:00 a.m.,
                  Lafayette, Louisiana time, three (3) Euro-Canadian Business
                  Days prior to any proposed Borrowing Date. The Banks shall not
                  be obligated to make Advances as Euro-Canadian Loans if the
                  amount thereof when added to the amount of all other
                  outstanding Euro-Canadian Loans exceeds $10,000,000 or when
                  the amount thereof when added to the Total Outstandings would
                  exceed the Revolving Commitment."

         . Section 3 of the Credit Agreement is hereby amended in the following
respects:

         () By deleting the reference to "$90,000,000" in Subsection 3(a) and
    substituting in lieu thereof the sum of "$100,000,000".

         () By the addition of a new Subsection 3(j) thereto as follows:

                           "(j) All Payments of Euro-Canadian Loans. All
                  payments or prepayments of Euro-Canadian Loans by Borrower
                  shall be made in Canadian Dollars to Agent's account at Royal
                  Bank of Canada."

         . Section 4 of the Credit Agreement is hereby amended bu adding a new
Subsection 4(a)(iii) thereto as follows:

                  "(iii) Euro-Canadian Loans. Borrower agrees to pay interest
         calculated utilizing a 360 daily interest factor over the number of
         days in an actual calendar year (365, or if appropriate, 366 days) with
         respect to the unpaid principal amount of each Euro-Canadian Loan from
         the date the proceeds thereof are made available to Borrower until
         maturity (whether by acceleration or otherwise), at a varying rate per
         annum equal to the lesser of (i) the Maximum Rate, or (ii) the
         Euro-Canadian Rate plus the Euro-Canadian Margin. Subject to the
         provisions of this Agreement with respect to prepayment, the principal
         of the Notes shall be payable as specified in Section 3(e) hereof and
         the interest with respect to each Euro-Canadian Loan shall be payable
         on each Interest Payment Date. Past due principal and, to the extent
         permitted by law, past due interest shall bear interest, payable on
         demand, at a rate per annum equal to the Default Rate. Upon two (2)
         Euro-Canadian Business Days' written notice prior to the making by the
         Banks of any Euro-Canadian Loan (in the case of the initial Interest
         Period therefor) or the expiration date of each succeeding Interest
         Period (in the case of subsequent Interest Periods therefor), Borrower
         shall have the option, subject to compliance by Borrower with all of
         the provisions of this Agreement, as long as no Event of Default
         exists, to specify whether the Interest Period commencing on any such
         date shall be a one (1), two (2) or three (3) month period. If Agent
         shall not have received timely notice of a designation of such Interest
         Period as herein provided, Borrower shall be deemed to have elected to
         a one (1) month period.

         . Section 5 of the Credit Agreement is hereby deleted in its entirety
and the following inserted in lieu thereof:

                  "(5)     Special Provisions Relating to Loans.

                           (a) Unavailability of Funds or Inadequacy of Pricing.
                  In the event that, in connection with any proposed Loan, any
                  Bank (i) shall have determined that U.S. Dollar deposits of
                  the relevant amount and for the relevant Eurodollar Interest
                  Period for Loans are not available to such Bank in the London
                  interbank market; or (ii) in good faith determines that the
                  Eurodollar Interest Rate or the Euro-Canadian Interest Rate
                  will not adequately reflect the cost to such Bank of
                  maintaining or funding the Eurodollar Loans or the
                  Euro-Canadian Loans (as the case may be) for 

<PAGE>   11

                  such Interest Period, the obligations of the Banks to make the
                  Eurodollar Loans or the Euro-Canadian Loans, as the case may
                  be, shall be suspended until such time such Bank in its sole
                  discretion reasonably exercised determines that the event
                  resulting in such suspension has ceased to exist. If any Bank
                  shall make such determination it shall promptly notify the
                  Agent in writing, Agent shall promptly notify Borrower in
                  writing, and Borrower shall either repay the outstanding
                  Eurodollar Loans or Euro-Canadian Loans, as the case may be,
                  owed to such Bank, without penalty, on the last day of the
                  current Interest Period or convert the same to Base Rate Loans
                  in the case of Eurodollar Loans or Euro-Canadian Loans on the
                  last day of the then current Interest Period for such
                  Eurodollar Loan or Euro-Canadian Loan.

                           (b) Reserve Requirements. In the event of any change
                  in any applicable law, treaty or regulation or in the
                  interpretation or administration thereof, or in the event any
                  central bank or other fiscal monetary or other authority
                  having jurisdiction over any Bank or the loans contemplated by
                  this Agreement shall impose, modify or deem applicable any
                  reserve requirement of the Board of Governors of the Federal
                  Reserve System on any Eurodollar Loan, or loans, or
                  Euro-Canadian Loan, or loans, or any other reserve, special
                  deposit, or similar requirements against assets to, deposits
                  with or for the account of, or credit extended by, the Banks
                  or shall impose on any Bank or the London interbank market, as
                  the case may be, any other condition affecting this Agreement
                  or the Eurodollar Loans or Euro-Canadian Loans and the result
                  of any of the foregoing is to increase the cost to any Bank in
                  making or maintaining its Eurodollar Loans or Euro-Canadian
                  Loans or to reduce any amount (or the effective return on any
                  amount) received by any Bank hereunder, then Borrower shall
                  pay to the Banks upon demand of any Bank as additional
                  interest on the Notes evidencing the Eurodollar Loans or
                  Euro-Canadian Loans such additional amount or amounts as will
                  reimburse the Banks for such additional cost or such
                  reduction. The Banks shall give notice to Borrower upon
                  becoming aware of any such change or imposition which may
                  result in any such increase or reduction. A certificate of any
                  Bank setting forth the basis for the determination of such
                  amount necessary to compensate Banks as aforesaid shall be
                  delivered to Borrower and shall be conclusive as to such
                  determination and such amount, absent error.

                           (c) Taxes. Both principal and interest on the Notes
                  evidencing the Eurodollar Loans or Euro-Canadian Loans and any
                  other payment due pursuant to any Loan Document are payable
                  without withholding or deduction for or on account of any
                  taxes. If any taxes are levied or imposed on or with respect
                  to the Notes evidencing the Eurodollar Loans or Euro-Canadian
                  Loans or on any payment on the Notes evidencing the Eurodollar
                  Loans or Euro-Canadian Loans made to any Bank, then, and in
                  any such event, Borrower shall pay to the Banks upon demand of
                  any Bank such additional amounts as may be necessary so that
                  every net payment of principal and interest on the Notes
                  evidencing the Eurodollar Loans or Euro-Canadian Loans, after
                  withholding or deduction for or on account of any such taxes,
                  will not be less than any amount provided for herein. In
                  addition, if at any time when the Eurodollar Loans or
                  Euro-Canadian Loans are outstanding any laws enacted or
                  promulgated, or any court of law or governmental agency
                  interprets or administers any law, which, in any such case,
                  materially changes the basis of taxation of payments to any
                  Bank of principal of or interest on the Notes evidencing the
                  Eurodollar Loans or Euro-Canadian Loans by reason of
                  subjecting such payments to double taxation or otherwise
                  (except through an increase in the rate of tax on the overall
                  net income of such Bank or Banks) then Borrower will pay the
                  amount of loss to the extent that such loss is caused by such
                  a change. The Banks shall give notice to Borrower upon
                  becoming aware of the amount of any loss incurred by any Bank
                  through enactment or promulgation of any such law which
                  materially changes the 

<PAGE>   12

                  basis of taxation of payments to one or more of the Banks. The
                  Banks shall also give notice on becoming aware of any such
                  enactment or promulgation which may result in such payments
                  becoming subject to double taxation or otherwise. A
                  certificate of any Bank setting forth the basis for the
                  determination of such loss and the computation of such amounts
                  shall be delivered to Borrower and shall be conclusive of such
                  determination and such amount, absent error.

                           (d) Change in Laws. If at any time any new law or any
                  change in existing laws or in the interpretation of any new or
                  existing laws shall make it unlawful for the Banks to maintain
                  or fund its Eurodollar Loans or Euro-Canadian Loans hereunder,
                  then the Banks shall promptly notify Borrower in writing and
                  Borrower shall either repay the outstanding Eurodollar Loan or
                  Euro-Canadian Loans owed to the Banks, without penalty, on the
                  last day of the current Interest Periods (or, if any Bank may
                  not lawfully continue to maintain and fund such Eurodollar
                  Loans, immediately), or Borrower may convert such Eurodollar
                  Loans or Euro-Canadian Loans at such appropriate time to Base
                  Rate Loans.

                           (e) Option to Fund. The Banks shall each have the
                  option if Borrower elect a Eurodollar Loan or Euro-Canadian
                  Loan, to purchase one or more deposits in order to fund or
                  maintain its funding of the principal balance of its Note to
                  which such Eurodollar Loan or Euro-Canadian Loan is applicable
                  during the Interest Period in question; it being understood
                  that the provisions of this Agreement relating to such funding
                  are included only for the purpose of determining the rate of
                  interest to be paid under such Eurodollar Loan or
                  Euro-Canadian Loan and any amounts owing hereunder and under
                  the Notes. Any Bank shall be entitled to fund and maintain its
                  funding of all or any part of that portion of the principal
                  balance of the Notes in any manner it sees fit, but all such
                  determinations hereunder shall be made as if such Bank has
                  actually funded and maintained that portion of the principal
                  balance of the Notes to which a Eurodollar Loan or
                  Euro-Canadian Loan is applicable during the applicable
                  Interest Period through the purchase of deposits in an amount
                  equal to the principal balance of the Notes to which such
                  Eurodollar Loan or Euro-Canadian Loan is applicable and having
                  a maturity corresponding to such Interest Period. Any Bank may
                  fund the outstanding principal balance of the Notes which is
                  to be subject to any Eurodollar Loan or Euro-Canadian Loan
                  from any branch or office of such Bank as any Bank may
                  designate from time to time.

                           (f) Indemnity. Borrower shall indemnify and hold
                  harmless the Banks against all reasonable and necessary
                  out-of-pocket costs and expenses which the Banks may sustain
                  (i) as a consequence of any Default or Event of Default by
                  Borrower under this Agreement, or (ii) outside of their
                  ordinary course of business in making and servicing any loan
                  or loans as Eurodollar Loans or Euro-Canadian Loans under this
                  Agreement.

                           (g) Payments Not at End of Interest Period. If
                  Borrower makes any payment of principal with respect to any
                  Eurodollar Loan or Euro-Canadian Loan on any day other than
                  the last day of the Interest Period applicable to such
                  Eurodollar Loan or Euro-Canadian Loan, as the case may be, or
                  if Borrower fails to reborrow or convert after giving notice
                  of its intent to do so, then Borrower shall reimburse the
                  Banks on demand for any loss, cost or expense incurred by the
                  Banks as a result of the timing of such payment or in
                  redepositing such principal amount, including the sum of (i)
                  the cost of funds to the Banks in respect of such principal
                  amount so paid, for the remainder of the Interest Period
                  applicable to such sum, reduced, if any Bank is able to
                  redeposit such principal amount so paid for the balance of the
                  Interest Period, by the interest earned by such Bank as a
                  result of so redepositing such principal amount, plus (ii) any
                  expense or penalty incurred by the Bank in redepositing such
                  principal amount. A 


<PAGE>   13

                  certificate of any Bank setting forth the basis for the
                  determination of the amount owed by Borrower pursuant to this
                  Section 5(g) shall be delivered to Borrower and shall be
                  conclusive in the absence of manifest error.

         . Section 6 of the Credit Agreement is hereby amended by adding a new
sentence to the end thereof as follows:

                  "To further secure the obligation of the Borrower and the
         Guarantors hereunder, (i) Borrower shall pledge to the Bank sixty-six
         percent (66%) of the issued and outstanding voting stock of Newpark
         Canada, Inc. and International Mat Ltd., such pledges to be made
         pursuant to documentation in form and substance satisfactory to Agent
         and shall represent first and prior Liens on such stock."

         . Section 11 of the Credit Agreement is hereby amended to add the new
Subsections 11(v) and 11(w) thereto as follows:

                  "(v) Subsidiaries. Borrower shall cause each of its
         Subsidiaries, whether they be a Guarantor or otherwise, to comply in
         all respects with the covenants contained in Sections 11 and 12 of this
         Agreement to the same extent as the Borrower and each Guarantor are
         required to so comply."

                  "(w) Maintain Book Registration. Borrower shall maintain the
         book registration of the shares of International Mat, Ltd. in the
         appropriate records in the Cayman Islands."

         . Section 12 of the Credit Agreement is hereby amended in the following
respects:

         () By the deletion of Subsection 12(e) and substituting the following
    in lieu thereof:

                  "(e) Tangible Net Worth. Borrower will not allow the
         Consolidated Tangible Net Worth to be less than $135,000,000 plus
         seventy-five percent (75%) of Borrower's Consolidated Net Income, if
         positive, for each fiscal quarter ending after September 30, 1998,
         tested at the end of each fiscal quarter."

         () Subsection 12(g) is hereby amended to delete the reference therein
    to "$10,000,000" and substitute in lieu thereof the sum of "$20,000,000".

         () Subsection 12(n)(iii) is hereby amended to delete the references
    therein to "$10,000,000" and substitute in lieu thereof in each instance the
    sum of "$20,000,000".

         . Section 14 of the Credit Agreement is hereby amended by the addition
of a new Subsection 14(p) as follows:

                  "(p) Advances and Repayments of Euro-Canadian Loans. Upon
         receipt of notice from the Agent of an Advance to be made to Borrower
         as a Euro-Canadian Loan and subject to the other provisions of this
         Agreement, each Bank severally agrees to fund its Pro Rata Part of each
         such Euro-Canadian Loan Advance in Canadian Dollars by wire transfer to
         Agent's account at Royal Bank of Canada, [address and wiring
         information].

         . In connection with the execution of this Fourth Amendment, Borrower
shall execute and deliver to the Banks new Notes representing each Bank's Pro
Rata Part of the increased Revolving Commitment. At the Fourth Amendment
Effective Date there shall be outstanding three (3) Notes in an aggregate face
amount of $100,000,000, one payable to Bank One in the face amount of
$39,440,000, one payable to Deutsche in the face amount of $35,560,000 and one
payable to Hibernia in the face amount of $25,000,000.

         . This Fourth Amendment shall be effective as of the date first above
written, but only upon satisfaction of the conditions precedent set forth in
Paragraph 6 hereto (the "Fourth Amendment Effective Date").


<PAGE>   14

         . The obligations of Banks under this Fourth Amendment shall be subject
to the satisfaction of the following conditions precedent:

         () Execution and Delivery. The Borrower shall have executed and
    delivered this Fourth Amendment, the Pledge Agreements covering the stock of
    Newpark Canada, Inc. and International Mat Ltd., and other required
    documents, all in form and substance satisfactory to the Banks;

         () Guarantors' Execution and Delivery. The Guarantors shall have
    executed and delivered this Fourth Amendment and other required documents,
    all in form and substance satisfactory to the Banks;

         () Corporate Resolutions. Banks shall have received appropriate
    certified corporate resolutions of each of the Borrower and each of the
    Guarantors;

         () Good Standing and Existence. The Banks shall have received evidence
    of existence and good standing for Borrower and each of the Guarantors;

         () Representations and Warranties. The representations and warranties
    of Borrower under the Credit Agreement are true and correct in all material
    respects as of such date, as if then made (except to the extent that such
    representations and warranties related solely to an earlier date);

         () No Event of Default. No Event of Default shall have occurred and be
    continuing nor shall any event have occurred or failed to occur which, with
    the passage of time or service of notice, or both, would constitute an Event
    of Default;

         () Other Documents. Each Bank shall have received such other
    instruments and documents incidental and appropriate to the transaction
    provided for herein as such Bank or its counsel may reasonably request, and
    all such documents shall be in form and substance satisfactory to such Bank;
    and

         () Legal Matters Satisfactory. All legal matters incident to the
    consummation of the transactions contemplated hereby shall be satisfactory
    to special counsel for Bank retained at the expense of Borrower.

         . Except to the extent its provisions are specifically amended,
modified or superseded by this Fourth Amendment, the representations, warranties
and affirmative and negative covenants of the Borrower contained in the Credit
Agreement are incorporated herein by reference for all purposes as if copied
herein in full. The Borrower hereby restates and reaffirms each and every term
and provision of the Credit Agreement, as amended, including, without
limitation, all representations, warranties and affirmative and negative
covenants. Except to the extent its provisions are specifically amended,
modified or superseded by this Fourth Amendment, the Credit Agreement, as
amended, and all terms and provisions thereof shall remain in full force and
effect, and the same in all respects are confirmed and approved by the Borrower
and the Banks.

         . The parties hereto agree that the Loma Letter of Credit is a "Letter
of Credit" issued under the Credit Agreement.

         . This Fourth Amendment may be executed in any number of counterparts
and all of such counterparts taken together shall be deemed to constitute one
and the same instrument.

         . The Borrower and each of the Guarantors hereby represent to the Banks
that all indebtedness either owed or available to be borrowed under the Credit
Agreement, as the same is amended from time to time, is "Senior Debt" under the
Indenture between Borrower, the Guarantors and State Street Bank and Trust
Company dated December 17, 1997 (the "Indenture") and that the increase in
availability provided for in this Fourth Amendment is not prohibited in any
respect pursuant to the provisions of Section 1008 of the Indenture.

<PAGE>   15

         . Each of the Guarantors hereby consents to the execution of this
Fourth Amendment by the Borrower and reaffirms its guaranty of all of the
obligations of the Borrower to the Bank. Each such Guarantor further
acknowledges and consents to the increase in the obligations owed the Banks
pursuant to the terms of this Fourth Amendment. Borrower and Guarantor
acknowledge and agree that the renewal, extension and amendment of the Credit
Agreement shall not be considered a novation of account or new contract but that
all existing rights, titles, powers, Liens, security interests and estates in
favor of the Banks constitute valid and existing obligations and Liens and
security interests as against the Collateral in favor of the Banks. Borrower and
each Guarantor confirm and agree that (a) neither the execution of this Fourth
Amendment or any other Loan Document nor the consummation of the transactions
described herein and therein shall in any way effect, impair or limit the
covenants, liabilities, obligations and duties of the Borrower and each
Guarantor under the Loan Documents and (b) the obligations evidenced and secured
by the Loan Documents continue in full force and effect. Each Guarantor hereby
further confirms that it unconditionally guarantees to the extent set forth in
its respect Guaranty the due and punctual payment and performance of any and all
amounts and obligations owed by the Banks under the Credit Agreement or the
other Loan Documents.

         IN WITNESS WHEREOF, the parties have caused this Fourth Amendment to
Restated Credit Agreement to be duly executed as of the date first above
written.

                                      BORROWER:

                                      NEWPARK RESOURCES, INC.
                                      a Delaware corporation


                                      By:      
                                         -------------------------------------
                                         John R. Dardenne, Sr., Treasurer

                                      GUARANTORS:

                                      CHEMICAL TECHNOLOGIES, INC.,
                                      EXCALIBAR MINERALS, INC., NEWPARK
                                      ENVIRONMENTAL SERVICES, INC.,
                                      MALLARD & MALLARD OF LA., INC.,
                                      NEWPARK HOLDINGS, INC., NEWPARK DRILLING
                                      FLUIDS, INC., SUPREME CONTRACTORS, INC.,
                                      AND  BOCKMON CONSTRUCTION COMPANY, INC.


                                      By:      
                                         -------------------------------------
                                         John R. Dardenne, Sr., Treasurer


                                      NEWPARK ENVIRONMENTAL MANAGEMENT
                                      COMPANY, L.L.C., NEWPARK TEXAS,
                                      L.L.C., EXCALIBAR MINERALS OF LA.,L.L.C.
                                      AND SOLOCO L.L.C.


                                      By:      
                                         -------------------------------------
                                         John R. Dardenne, Sr., Treasurer

<PAGE>   16

                                      BATSON-MILL, L.P., NEWPARK TEXAS DRILLING,
                                      FLUIDS L.P., NEWPARK ENVIRONMENTAL
                                      SERVICES OF TEXAS, L.P., NEWPARK
                                      SHIPHOLDING TEXAS, L.P., N.I.D., L.P.,
                                      SOLOCO TEXAS, L.P., NES PERMIAN BASIN, 
                                      L.P. AND NEWPARK ENVIRONMENTAL SERVICES
                                      MISSISSIPPI, L.P.

                                      By:   Newpark Holdings, Inc., the general
                                            partner of each


                                      By:      
                                         -------------------------------------
                                         John R. Dardenne, Sr., Treasurer


                                      NDF MEXICO, INC.



                                      By:      
                                         -------------------------------------
                                      Name:    
                                           -----------------------------------
                                      Title:   
                                            ----------------------------------


                                      BANKS:

                                      BANK ONE, LOUISIANA,
                                      NATIONAL ASSOCIATION,
                                      a national banking association


                                      By:
                                         -------------------------------------
                                         Rose M. Miller, Vice President



                                      DEUTSCHE BANK A.G., NEW YORK BRANCH
                                      AND/OR CAYMAN ISLANDS BRANCH


                                      By:      
                                         -------------------------------------
                                      Name:    
                                           -----------------------------------
                                      Title:   
                                            ----------------------------------


                                      By:      
                                         -------------------------------------
                                      Name:    
                                           -----------------------------------
                                      Title:   
                                            ----------------------------------



                                      HIBERNIA NATIONAL BANK


                                      By:      
                                         -------------------------------------
                                      Name:    
                                           -----------------------------------
                                      Title:   
                                            ----------------------------------


                                      AGENT:

                                      BANK ONE, LOUISIANA,
                                      NATIONAL ASSOCIATION,
                                      a national banking association


                                      By:      
                                         -------------------------------------
                                         Rose M. Miller, Vice President

<PAGE>   17


                                      CO-AGENT:

                                      DEUTSCHE BANK A.G., NEW YORK BRANCH
                                      AND/OR CAYMAN ISLANDS BRANCH


                                      By:      
                                         -------------------------------------
                                      Name:    
                                           -----------------------------------
                                      Title:   
                                            ----------------------------------


                                      By:      
                                         -------------------------------------
                                      Name:    
                                           -----------------------------------
                                      Title:   
                                            ----------------------------------




<PAGE>   18
                  FIFTH AMENDMENT TO RESTATED CREDIT AGREEMENT


         THIS FIFTH AMENDMENT TO RESTATED CREDIT AGREEMENT (hereinafter referred
to as the "Fifth Amendment") executed as of the 1st day of February, 1999, by
and among NEWPARK RESOURCES, INC., a Delaware corporation ("Borrower"), SOLOCO,
L.L.C., a Louisiana limited liability company ("SOLOCO, L.L.C."), NEWPARK
SHIPHOLDING TEXAS, L.P., a Texas limited partnership ("Newpark Shipholding"),
MALLARD & MALLARD OF LA., INC., a Louisiana corporation ("Mallard"), SOLOCO
TEXAS L.P., a Texas limited partnership ("SOLOCO Texas"), BATSON-MILL, L.P., a
Texas limited partnership ("Batson"), N.I.D., L.P., a Texas limited partnership
("N.I.D."), NEWPARK TEXAS, L.L.C., a Louisiana limited liability company
("Newpark Texas"), NEWPARK HOLDINGS, INC., a Louisiana corporation ("Holdings"),
NEWPARK ENVIRONMENTAL MANAGEMENT COMPANY, L.L.C., a Louisiana limited liability
company ("Environmental L.L.C."), NEWPARK ENVIRONMENTAL SERVICES OF TEXAS L.P.,
a Texas limited partnership ("Environmental L.P."), NEWPARK DRILLING FLUIDS,
INC., a Texas corporation ("Newpark Drilling"), SUPREME CONTRACTORS, INC., a
Louisiana corporation ("Supreme"), EXCALIBAR MINERALS, INC., a Texas corporation
("Excalibar"), EXCALIBAR MINERALS OF LA., L.L.C., a Louisiana limited liability
company ("Excalibar Minerals"), CHEMICAL TECHNOLOGIES, INC., a Texas corporation
("Chemical"), NEWPARK ENVIRONMENTAL SERVICES, INC., a Delaware corporation
("Newpark Services"), NEWPARK TEXAS DRILLING FLUIDS, L.P., a Texas limited
partnership ("Texas Drilling"), NES PERMIAN BASIN, L.P., A Texas limited
partnership ("NES"), BOCKMON CONSTRUCTION COMPANY, INC., a Texas Corporation
("Bockmon"), NEWPARK ENVIRONMENTAL SERVICES MISSISSIPPI, L.P., a Mississippi
limited partnership ("Mississippi"), NDF MEXICO, INC., a Texas corporation
("Mexico") (SOLOCO, L.L.C., Newpark Shipholding, Mallard, SOLOCO Texas, Batson,
N.I.D., Newpark Texas, Holdings, Environmental L.L.C., Environmental L.P.,
Newpark Drilling, Supreme, Excalibar, Excalibar Minerals, Chemical, Newpark
Services, Texas Drilling, NES, Bockmon, Mississippi and Mexico are herein
collectively referred to as the "Guarantors", and individually, "Guarantor"),
BANK ONE, LOUISIANA, NATIONAL ASSOCIATION, a national banking association ("Bank
One"), DEUTSCHE BANK A.G., NEW YORK BRANCH AND/OR CAYMAN ISLANDS BRANCH
("Deutsche"), HIBERNIA NATIONAL BANK, a national banking association
("Hibernia") and each of the financial institutions which is a party hereto (as
evidenced by the signature pages to this Fifth Amendment) or which may from time
to time become a party hereto or any successor or assignee thereof (hereinafter
collectively referred to as "Banks", and individually, "Bank") and Bank One, as
Administrative and Syndication Agent ("Agent") and Deutsche as Documentation
Agent ("Co-Agent").

                              W I T N E S S E T H:

         WHEREAS, Borrower, certain of the Guarantors, Bank One and Hibernia
entered into a Credit Agreement dated as of June 29, 1995 under the terms of
which Bank One and Hibernia agreed to provide Borrower with a revolving loan
facility in amounts of up to $25,000,000.00 and a term loan facility in amounts
of up to $25,000,000.00; and

         WHEREAS, as of June 30, 1997 the Borrower, the Guarantors, the Agent,
the Co-Agent and the Banks entered into a Restated Credit Agreement to
consolidate all outstanding loan facilities into one facility in a maximum
amount of $90,000,000 (the Restated Credit Agreement is hereinafter referred to
as the "Credit Agreement"); and

         WHEREAS, as of November 7, 1997, the Borrower, the Guarantors, the
Agent, the Co-Agent and the Banks entered into a First Amendment to Restated
Credit Agreement (the "First Amendment"); and

         WHEREAS, as of December 10, 1997, the Borrower, the Guarantors, the
Agent, the Co- Agent and the Banks entered into a Second Amendment to Restated
Credit Agreement (the "Second Amendment"); and

         WHEREAS, as of May 28, 1998, the Borrower, the Guarantors, the Agent,
the Co-Agent and the Banks entered into a Third Amendment to Restated Credit
Agreement (the "Third Amendment"); and


<PAGE>   19

         WHEREAS, as of September 29, 1998, the Borrower, the Guarantors, the
Agent, the Co-Agent and the Banks entered into a Fourth Amendment to Restated
Credit Agreement (the "Fourth Amendment"); and

         WHEREAS, the Borrower has requested that the Banks make certain
additional amendments to the Credit Agreement and the Agent, the Co-Agent and
the Banks are willing to make such additional amendments.

         NOW, THEREFORE, the parties hereto agree as follows:

                  . Unless otherwise defined herein, all defined terms used
herein shall have the same meaning ascribed to such terms in the Credit
Agreement.

                  . Section 1 of the Credit Agreement is hereby amended in the
following respects:

                  () By deleting the definition of "Reimbursment Agreement"
         therefrom and inserting the following in lieu thereof :

                           "Reimbursement Agreement" means that certain
                  Reimbursement Agreement dated as of May 1, 1998 by and among
                  Borrower, The Loma Company, L.L.C. and Bank One, as the same
                  is amended and supplemented from time to time including, but
                  not limited to, that certain First Amendment and Supplement to
                  Reimbursement Agreement between said parties dated as of
                  February 1,1999."

                  () By deleting the definition of "Loma Letter of Credit" and
         substituting the following in lieu thereof:

                           "Loma Letter of Credit" means that certain
                  Irrevocable Letter of Credit dated May 28, 1998 from Bank to
                  Bank One Trust Company, N.A., as Trustee, issued at the
                  request of and for the account of Borrower in the stated
                  amount of $15,187,500.00, as the same may be amended, restated
                  or increased from time to time, including, but not limited to,
                  that certain Amendment to Irrevocable Letter of Credit dated
                  as of February 1, 1999 between said parties which increases
                  the stated amount of the Loma Letter of Credit to
                  $16,959,375.00."

                  . This Fifth Amendment shall be effective as of the date first
above written, but only upon satisfaction of the conditions precedent set forth
in Paragraph 4 hereto (the "Fifth Amendment Effective Date").

                  . The obligations of Banks under this Fifth Amendment shall be
subject to the satisfaction of the following conditions precedent:

                  () Execution and Delivery. The Borrower shall have executed
         and delivered this Fifth Amendment and other required documents, all in
         form and substance satisfactory to the Banks;

                  () Guarantors' Execution and Delivery. The Guarantors shall
         have executed and delivered this Fifth Amendment and other required
         documents, all in form and substance satisfactory to the Banks;

                  () Corporate Resolutions. Banks shall have received
         appropriate certified corporate resolutions of each of the Borrower and
         each of the Guarantors;

                  () Good Standing and Existence. The Banks shall have received
         evidence of existence and good standing for Borrower and each of the
         Guarantors;

                  () Representations and Warranties. The representations and
         warranties of Borrower under the Credit Agreement are true and correct
         in all material respects as of such date, as if then made (except to
         the extent that such representations and warranties related solely to
         an earlier date);

<PAGE>   20

                  () No Event of Default. No Event of Default shall have
         occurred and be continuing nor shall any event have occurred or failed
         to occur which, with the passage of time or service of notice, or both,
         would constitute an Event of Default;

                  () Other Documents. Each Bank shall have received such other
         instruments and documents incidental and appropriate to the transaction
         provided for herein as such Bank or its counsel may reasonably request,
         and all such documents shall be in form and substance satisfactory to
         such Bank; and

                  () Legal Matters Satisfactory. All legal matters incident to
         the consummation of the transactions contemplated hereby shall be
         satisfactory to special counsel for Bank retained at the expense of
         Borrower.

                  . Except to the extent its provisions are specifically
amended, modified or superseded by this Fifth Amendment, the representations,
warranties and affirmative and negative covenants of the Borrower contained in
the Credit Agreement are incorporated herein by reference for all purposes as if
copied herein in full. The Borrower hereby restates and reaffirms each and every
term and provision of the Credit Agreement, as amended, including, without
limitation, all representations, warranties and affirmative and negative
covenants. Except to the extent its provisions are specifically amended,
modified or superseded by this Fifth Amendment, the Credit Agreement, as
amended, and all terms and provisions thereof shall remain in full force and
effect, and the same in all respects are confirmed and approved by the Borrower
and the Banks.

                  . This Fifth Amendment may be executed in any number of
counterparts and all of such counterparts taken together shall be deemed to
constitute one and the same instrument.

                  . Each of the Guarantors hereby consents to the execution of
this Fifth Amendment by the Borrower and reaffirms its guaranty of all of the
obligations of the Borrower to the Bank. Each such Guarantor further
acknowledges and consents to the increase in the obligations owed the Banks
pursuant to the terms of this Fifth Amendment. Borrower and Guarantor
acknowledge and agree that the renewal, extension and amendment of the Credit
Agreement shall not be considered a novation of account or new contract but that
all existing rights, titles, powers, Liens, security interests and estates in
favor of the Banks constitute valid and existing obligations and Liens and
security interests as against the Collateral in favor of the Banks. Borrower and
each Guarantor confirm and agree that (a) neither the execution of this Fifth
Amendment or any other Loan Document nor the consummation of the transactions
described herein and therein shall in any way effect, impair or limit the
covenants, liabilities, obligations and duties of the Borrower and each
Guarantor under the Loan Documents and (b) the obligations evidenced and secured
by the Loan Documents continue in full force and effect. Each Guarantor hereby
further confirms that it unconditionally guarantees to the extent set forth in
its respect Guaranty the due and punctual payment and performance of any and all
amounts and obligations owed by the Banks under the Credit Agreement or the
other Loan Documents.

         IN WITNESS WHEREOF, the parties have caused this Fifth Amendment to
Restated Credit Agreement to be duly executed as of the date first above
written.

                                 BORROWER:

                                 NEWPARK RESOURCES, INC.
                                 a Delaware corporation


                                 By:      
                                    ------------------------------------
                                    John R. Dardenne, Sr., Treasurer


<PAGE>   21

                                 GUARANTORS:

                                 CHEMICAL TECHNOLOGIES, INC.,
                                 EXCALIBAR MINERALS, INC., NEWPARK
                                 ENVIRONMENTAL SERVICES, INC.,
                                 MALLARD & MALLARD OF LA., INC.,
                                 NEWPARK HOLDINGS, INC., NEWPARK DRILLING
                                 FLUIDS, INC., SUPREME CONTRACTORS, INC.,
                                 AND BOCKMON CONSTRUCTION
                                 COMPANY, INC.


                                 By:      
                                    ------------------------------------
                                    John R. Dardenne, Sr., Treasurer


                                 NEWPARK ENVIRONMENTAL MANAGEMENT
                                 COMPANY, L.L.C., NEWPARK TEXAS,
                                 L.L.C., EXCALIBAR MINERALS OF LA.,L.L.C.
                                 AND SOLOCO L.L.C.


                                 By:      
                                    ------------------------------------
                                    John R. Dardenne, Sr., Treasurer


                                 BATSON-MILL, L.P., NEWPARK TEXAS DRILLING,
                                 FLUIDS L.P., NEWPARK ENVIRONMENTAL
                                 SERVICES OF TEXAS, L.P., NEWPARK
                                 SHIPHOLDING TEXAS, L.P., N.I.D., L.P.,
                                 SOLOCO TEXAS, L.P., NES PERMIAN BASIN, L.P.
                                 AND NEWPARK ENVIRONMENTAL SERVICES
                                 MISSISSIPPI, L.P.

                                 By:   Newpark Holdings, Inc., the general
                                       partner of each


                                 By:      
                                    ------------------------------------
                                    John R. Dardenne, Sr., Treasurer



                                 NDF MEXICO, INC.



                                 By:      
                                    -------------------------------------
                                 Name:    
                                      -----------------------------------
                                 Title:   
                                       ----------------------------------

                                 BANKS:

                                 BANK ONE, LOUISIANA,
                                 NATIONAL ASSOCIATION,
                                 a national banking association


                                 By:      
                                    -------------------------------------
                                    Rose M. Miller, Vice President


<PAGE>   22

                                 DEUTSCHE BANK A.G., NEW YORK BRANCH
                                 AND/OR CAYMAN ISLANDS BRANCH


                                 By:      
                                    -------------------------------------
                                 Name:    
                                      -----------------------------------
                                 Title:   
                                       ----------------------------------


                                 By:      
                                    -------------------------------------
                                 Name:    
                                      -----------------------------------
                                 Title:   
                                       ----------------------------------



                                 HIBERNIA NATIONAL BANK


                                 By:      
                                    -------------------------------------
                                 Name:    
                                      -----------------------------------
                                 Title:   
                                       ----------------------------------

                                 AGENT:

                                 BANK ONE, LOUISIANA,
                                 NATIONAL ASSOCIATION,
                                 a national banking association


                                 By:      
                                    -------------------------------------
                                    Rose M. Miller, Vice President

                                 CO-AGENT:

                                 DEUTSCHE BANK A.G., NEW YORK BRANCH
                                 AND/OR CAYMAN ISLANDS BRANCH


                                 By:      
                                    -------------------------------------
                                 Name:    
                                      -----------------------------------
                                 Title:   
                                       ----------------------------------


                                 By:      
                                    -------------------------------------
                                 Name:    
                                      -----------------------------------
                                 Title:   
                                       ----------------------------------
<PAGE>   23
                  SIXTH AMENDMENT TO RESTATED CREDIT AGREEMENT


         THIS SIXTH AMENDMENT TO RESTATED CREDIT AGREEMENT (hereinafter referred
to as the "Sixth Amendment") executed as of the 26th day of March, 1999, by and
among NEWPARK RESOURCES, INC., a Delaware corporation ("Borrower"), SOLOCO,
L.L.C., a Louisiana limited liability company ("SOLOCO, L.L.C."), NEWPARK
SHIPHOLDING TEXAS, L.P., a Texas limited partnership ("Newpark Shipholding"),
MALLARD & MALLARD OF LA., INC., a Louisiana corporation ("Mallard"), SOLOCO
TEXAS L.P., a Texas limited partnership ("SOLOCO Texas"), BATSON-MILL, L.P., a
Texas limited partnership ("Batson"), N.I.D., L.P., a Texas limited partnership
("N.I.D."), NEWPARK TEXAS, L.L.C., a Louisiana limited liability company
("Newpark Texas"), NEWPARK HOLDINGS, INC., a Louisiana corporation ("Holdings"),
NEWPARK ENVIRONMENTAL MANAGEMENT COMPANY, L.L.C., a Louisiana limited liability
company ("Environmental L.L.C."), NEWPARK ENVIRONMENTAL SERVICES OF TEXAS L.P.,
a Texas limited partnership ("Environmental L.P."), NEWPARK DRILLING FLUIDS,
INC., a Texas corporation ("Newpark Drilling"), SUPREME CONTRACTORS, INC., a
Louisiana corporation ("Supreme"), EXCALIBAR MINERALS, INC., a Texas corporation
("Excalibar"), EXCALIBAR MINERALS OF LA., L.L.C., a Louisiana limited liability
company ("Excalibar Minerals"), CHEMICAL TECHNOLOGIES, INC., a Texas corporation
("Chemical"), NEWPARK ENVIRONMENTAL SERVICES, INC., a Delaware corporation
("Newpark Services"), NEWPARK TEXAS DRILLING FLUIDS, L.P., a Texas limited
partnership ("Texas Drilling"), NES PERMIAN BASIN, L.P., A Texas limited
partnership ("NES"), BOCKMON CONSTRUCTION COMPANY, INC., a Texas Corporation
("Bockmon"), NEWPARK ENVIRONMENTAL SERVICES MISSISSIPPI, L.P., a Mississippi
limited partnership ("Mississippi"), NDF MEXICO, INC., a Texas corporation
("Mexico") (SOLOCO, L.L.C., Newpark Shipholding, Mallard, SOLOCO Texas, Batson,
N.I.D., Newpark Texas, Holdings, Environmental L.L.C., Environmental L.P.,
Newpark Drilling, Supreme, Excalibar, Excalibar Minerals, Chemical, Newpark
Services, Texas Drilling, NES, Bockmon, Mississippi and Mexico are herein
collectively referred to as the "Guarantors", and individually, "Guarantor"),
BANK ONE, LOUISIANA, NATIONAL ASSOCIATION, a national banking association ("Bank
One"), DEUTSCHE BANK A.G., NEW YORK BRANCH AND/OR CAYMAN ISLANDS BRANCH
("Deutsche"), HIBERNIA NATIONAL BANK, a national banking association
("Hibernia") and each of the financial institutions which is a party hereto (as
evidenced by the signature pages to this Sixth Amendment) or which may from time
to time become a party hereto or any successor or assignee thereof (hereinafter
collectively referred to as "Banks", and individually, "Bank") and Bank One, as
Administrative and Syndication Agent ("Agent") and Deutsche as Documentation
Agent ("Co-Agent").

                              W I T N E S S E T H:

         WHEREAS, Borrower, certain of the Guarantors, Bank One and Hibernia
entered into a Credit Agreement dated as of June 29, 1995 under the terms of
which Bank One and Hibernia agreed to provide Borrower with a revolving loan
facility in amounts of up to $25,000,000.00 and a term loan facility in amounts
of up to $25,000,000.00; and



<PAGE>   24

         WHEREAS, as of June 30, 1997 the Borrower, the Guarantors, the Agent,
the Co-Agent and the Banks entered into a Restated Credit Agreement to
consolidate all outstanding loan facilities into one facility in a maximum
amount of $90,000,000 (the Restated Credit Agreement is hereinafter referred to
as the "Credit Agreement"); and

         WHEREAS, as of November 7, 1997, the Borrower, the Guarantors, the
Agent, the Co-Agent and the Banks entered into a First Amendment to Restated
Credit Agreement (the "First Amendment"); and

         WHEREAS, as of December 10, 1997, the Borrower, the Guarantors, the
Agent, the Co-Agent and the Banks entered into a Second Amendment to Restated
Credit Agreement (the "Second Amendment"); and

         WHEREAS, as of May 28, 1998, the Borrower, the Guarantors, the Agent,
the Co-Agent and the Banks entered into a Third Amendment to Restated Credit
Agreement (the "Third Amendment"); and

         WHEREAS, as of September 29, 1998, the Borrower, the Guarantors, the
Agent, the Co-Agent and the Banks entered into a Fourth Amendment to Restated
Credit Agreement (the "Fourth Amendment"); and

         WHEREAS, as of February 1, 1999, the Borrower, the Guarantors, the
Agent, the Co-Agent and the Banks entered into a Fifth Amendment to Restated
Credit Agreement (the "Fifth Amendment"); and

         WHEREAS, the Borrower has requested that the Banks make certain
additional amendments to the Credit Agreement and the Agent, the Co-Agent and
the Banks are willing to make such additional amendments.

         NOW, THEREFORE, the parties hereto agree as follows:

         1. Unless otherwise defined herein, all defined terms used herein shall
have the same meaning ascribed to such terms in the Credit Agreement.

         2. Section 1 of the Credit Agreement is hereby amended in the following
respects:

                  (a) By deleting the definition of "Eurodollar Margin"
         therefrom and inserting the following in lieu thereof :

                           "Eurodollar Margin"shall mean, with respect to each
                  Eurodollar Loan:



                                      -2-
<PAGE>   25

                                    (i) two and three-quarters percent (2.75%)
                           per annum whenever the Borrower's ratio of
                           Consolidated Funded Debt to Consolidated EBITDA is
                           equal to or greater than 2.50 to 1.0; or

                                    (ii) two and one-quarter percent (2.25%) per
                           annum whenever Borrower's ratio of Consolidated
                           Funded Debt to Consolidated EBITDA is equal to or
                           greater than 2.25 to 1.0 but less than 2.50 to 1.0;
                           or

                                    (iii) two percent (2%) per annum whenever
                           Borrower's ratio of Consolidated Funded Debt to
                           Consolidated EBITDA is equal to or greater than 1.75
                           to 1.0 but less than 2.25 to 1.0; or

                                    (iv) one and one-half percent (1.50%) per
                           annum whenever Borrower's ratio of Consolidated
                           Funded Debt to Consolidated EBITDA is equal to or
                           greater than 1.25 to 1.0 but less than 1.75 to 1.0;
                           or

                                    (v) one and one-quarter percent (1.25%) per
                           annum whenever Borrower's ratio of Consolidated
                           Funded Debt to Consolidated EBITDA is equal to or
                           less than 1.25 to 1.0.

                  The Eurodollar Margin shall be determined at the end of each
                  fiscal quarter of Borrower and calculated on a trailing four
                  quarter basis and shall immediately apply to each new Tranche
                  and each rollover Tranche."

                  (b) By deleting the definition of "Euro-Canadian Margin" and
         substituting the following in lieu thereof:

                           Euro-Canadian Margin" shall mean, with respect to
                   each Euro-Canadian Loan:

                                    (i) two and three-quarters percent (2.75%)
                           per annum whenever the Borrower's ratio of
                           Consolidated Funded Debt to Consolidated EBITDA is
                           equal to or greater than 2.50 to 1.0; or

                                    (ii) two and one-quarter percent (2.25%) per
                           annum whenever Borrower's ratio of Consolidated
                           Funded Debt to Consolidated EBITDA is equal to or
                           greater than 2.25 to 1.0 but less than 2.50 to 1.0;
                           or



                                      -3-
<PAGE>   26

                                    (iii) two percent (2%) per annum whenever
                           Borrower's ratio of Consolidated Funded Debt to
                           Consolidated EBITDA is equal to or greater than 1.75
                           to 1.0 but less than 2.25 to 1.0; or

                                    (iv) one and one-half percent (1.50%) per
                           annum whenever Borrower's ratio of Consolidated
                           Funded Debt to Consolidated EBITDA is equal to or
                           greater than 1.25 to 1.0 but less than 1.75 to 1.0;
                           or

                                    (v) one and one-quarter percent (1.25%) per
                           annum whenever Borrower's ratio of Consolidated
                           Funded Debt to Consolidated EBITDA is equal to or
                           less than 1.25 to 1.0.

                  The Euro-Canadian Margin shall be determined at the end of
                  each fiscal quarter of Borrower and calculated on a trailing
                  four quarter basis and shall immediately apply to each new
                  Tranche and each rollover Tranche."

                  (c) By deleting the definition of "Unused Fee Rate" therefrom
         and substituting the following in lieu thereof:

                           "Unused Fee Rate" shall mean:

                           (i) one-half percent (.50%) per annum whenever
                  Borrower's ratio of Consolidated Funded Debt to Consolidated
                  EBITDA is equal to or greater than 2.25 to 1.0;

                           (ii) three-eighths percent (.375%) per annum whenever
                  Borrower's ratio of Consolidated Funded Debt to Consolidated
                  EBITDA is equal to or greater than 1.75 to 1.0 but less than
                  2.25 to 1.0;

                           (iii) five-sixteenths percent (.3125%) per annum
                  whenever Borrower's ratio of Consolidated Funded Debt to
                  Consolidated EBITDA is equal to or greater than 1.25 to 1.0
                  but less than 1.75 to 1.0;

                           (iv) one-quarter of one percent (.25%) per annum
                  whenever Borrower's ratio of Consolidated Funded Debt to
                  Consolidated EBITDA is less than 1.25 to 1.0.

                  The Unused Fee Rate shall be measured at the end of each
                  fiscal quarter and calculated on a trailing four quarter
                  basis."

                  (d) By deleting the definition of "Asset Write-Down" that was
         added by the Fourth Amendment.



                                      -4-
<PAGE>   27

         3. Section 2 of the Credit Agreement is hereby amended by deleting
Subsection (d) thereof in its entirety and inserting the following in lieu
thereof:

                  "(d) Procedure for Obtaining Letters of Credit. The amount and
         date of issuance, renewal, extension or reissuance of a Letter of
         Credit pursuant to the Banks' commitment above in Section 2(c) shall be
         designated by Borrower's written request delivered to Agent at least
         three (3) Business Days prior to the date of such issuance, renewal,
         extension or reissuance. Concurrently with or promptly following the
         delivery of the request for a Letter of Credit, Borrower shall execute
         and deliver to the Agent an application and agreement with respect to
         the Letter of Credit, said application and agreement to be in the form
         used by the Agent. The Agent shall not be obligated to issue, renew,
         extend or reissue such Letters of Credit if (A) the conditions
         precedent specified in Section 10 hereof shall not have been satisfied,
         or (B) the amount thereon when added to the amount of the outstanding
         Letters of Credit exceeds Twenty Million Dollars ($20,000,000.00) or
         (C) the amount thereof when added to the Total Outstandings would
         exceed the Revolving Commitment. Once issued, the Agent shall have the
         authority (subject to the terms and conditions hereof) to renew and
         extend from time to time the expiry date of any Letter of Credit
         without the requirement of the joinder of any of the Banks, except that
         the Agent shall not renew or extend the expiry date of any such Letter
         of Credit beyond the Maturity Date. Borrower agrees to pay the Agent
         for the benefit of the Banks commissions for issuing the Letters of
         Credit (calculated separately for each Letter of Credit) in an amount
         equal to the face amount of each such Letter of Credit times the then
         effective Eurodollar Margin minus one-eighth of one percent (.125%) per
         annum. Borrower further agrees to pay Agent (i) an additional fee equal
         to one-eighth of one percent (.125%) per annum on the maximum face
         amount of each Letter of Credit, and (ii) an amendment fee for any
         amendment to letters of credit issued hereunder, said fee to be in the
         amount of $50.00 per amendment and shall be due upon the issuance of
         such amendment. For all new Letters of Credit issued after the Sixth
         Amendment Effective Date, such commissions shall be paid quarterly in
         advance with the first such fee being payable prior to the issuance of
         each Letter of Credit and thereafter at the end of each three (3) month
         period while such Letter of Credit is outstanding. For all Letters of
         Credit issued and outstanding as of the Sixth Amendment Effective Date,
         such new commission rate shall not apply until the next anniversary
         date of such Letter of Credit."

         4. Section 12 of the Credit Agreement is hereby amended in the
following respects:

                  (a) By deleting Subsection 12(d) therefrom in its entirety and
         substituting the following in lieu thereof:



                                      -5-
<PAGE>   28

                           "(d) Maximum Total Debt Ratios. Borrower will not
                  allow the ratio of (i) total Debt (including Capital Lease
                  Obligations) less Subordinated Indebtedness, to (ii) Total
                  Capitalization (including Subordinated Indebtedness), to ever
                  exceed 36% as of the end of any fiscal quarter."

                  (b) By deleting Subsection 12(e) therefrom in its entirety and
         substituting the following in lieu thereof:

                           "(e) Tangible Net Worth. Borrower will not allow its
                  Consolidated Tangible Net Worth to be less, as of the end of
                  any fiscal quarter, than $118,958,000 plus (i) seventy-five
                  percent (75%) of Borrower's Consolidated Net Income, if
                  positive, for each fiscal quarter ending after December 31,
                  1998 and (ii) net proceeds received by Borrower from the
                  issuance and sale of any its preferred stock."

                  (c) By deleting Subsection 12(q) therefrom in its entirety and
         substituting the following in lieu thereof:

                           "(q) Maximum Consolidated Funded Debt. Borrower will
                  not allow its ratio of Consolidated Funded Debt to
                  Consolidated EBITDA as of the end of any fiscal quarter for
                  the previous twelve (12) months ending on such date to ever
                  exceed (i) 3.50 to 1.0 as of the end of any fiscal quarter to
                  and including the fiscal quarter ended September 30, 1999, and
                  (ii) thereafter, 2.75 to 1.0 beginning with the fiscal quarter
                  ending December 31, 1999."

         5. The Banks hereby agree to waive any Defaults or Events of Default
that have occurred as a result of the Borrower's failure to comply with the
provisions of Sections 12(d), (e), (f) and (q) of the Credit Agreement as of the
fiscal quarter ended December 31, 1998. The waivers contained herein are waivers
specific to the provisions noted and are not waivers of any other provisions of
the Credit Agreement for any period.

         6. This Sixth Amendment shall be effective as of the date first above
written, but only upon satisfaction of the conditions precedent set forth in
Paragraph 7 hereto (the "Sixth Amendment Effective Date").



                                      -6-
<PAGE>   29


         7. The obligations of Banks under this Sixth Amendment shall be subject
to the satisfaction of the following conditions precedent:

                  (a) Execution and Delivery. The Borrower shall have executed
         and delivered this Sixth Amendment and other required documents, all in
         form and substance satisfactory to the Banks;

                  (b) Guarantors' Execution and Delivery. The Guarantors shall
         have executed and delivered this Sixth Amendment and other required
         documents, all in form and substance satisfactory to the Banks;

                  (c) Corporate Resolutions. Banks shall have received
         appropriate certified corporate resolutions of each of the Borrower and
         each of the Guarantors;

                  (d) Representations and Warranties. The representations and
         warranties of Borrower under the Credit Agreement are true and correct
         in all material respects as of such date, as if then made (except to
         the extent that such representations and warranties related solely to
         an earlier date);

                  (e) No Event of Default. No Event of Default shall have
         occurred and be continuing nor shall any event have occurred or failed
         to occur which, with the passage of time or service of notice, or both,
         would constitute an Event of Default;

                  (f) Other Documents. Each Bank shall have received such other
         instruments and documents incidental and appropriate to the transaction
         provided for herein as such Bank or its counsel may reasonably request,
         and all such documents shall be in form and substance satisfactory to
         such Bank; and

                  (g) Legal Matters Satisfactory. All legal matters incident to
         the consummation of the transactions contemplated hereby shall be
         satisfactory to special counsel for Bank retained at the expense of
         Borrower.

         8. Except to the extent its provisions are specifically amended,
modified or superseded by this Sixth Amendment, the representations, warranties
and affirmative and negative covenants of the Borrower contained in the Credit
Agreement are incorporated herein by reference for all purposes as if copied
herein in full. The Borrower hereby restates and reaffirms each and every term
and provision of the Credit Agreement, as amended, including, without
limitation, all representations, warranties and affirmative and negative
covenants. Except to the extent its provisions are specifically amended,
modified or superseded by this Sixth Amendment, the Credit Agreement, as
amended, and all terms and provisions thereof shall remain in full force and
effect, and the same in all respects are confirmed and approved by the Borrower
and the Banks.



                                      -7-
<PAGE>   30


         9. This Sixth Amendment may be executed in any number of counterparts
and all of such counterparts taken together shall be deemed to constitute one
and the same instrument.

         10. Each of the Guarantors hereby consents to the execution of this
Sixth Amendment by the Borrower and reaffirms its guaranty of all of the
obligations of the Borrower to the Bank. Each such Guarantor further
acknowledges and consents to the increase in the obligations owed the Banks
pursuant to the terms of this Sixth Amendment. Borrower and Guarantor
acknowledge and agree that the renewal, extension and amendment of the Credit
Agreement shall not be considered a novation of account or new contract but that
all existing rights, titles, powers, Liens, security interests and estates in
favor of the Banks constitute valid and existing obligations and Liens and
security interests as against the Collateral in favor of the Banks. Borrower and
each Guarantor confirm and agree that (a) neither the execution of this Sixth
Amendment or any other Loan Document nor the consummation of the transactions
described herein and therein shall in any way effect, impair or limit the
covenants, liabilities, obligations and duties of the Borrower and each
Guarantor under the Loan Documents and (b) the obligations evidenced and secured
by the Loan Documents continue in full force and effect. Each Guarantor hereby
further confirms that it unconditionally guarantees to the extent set forth in
its respect Guaranty the due and punctual payment and performance of any and all
amounts and obligations owed by the Banks under the Credit Agreement or the
other Loan Documents.

         IN WITNESS WHEREOF, the parties have caused this Sixth Amendment to
Restated Credit Agreement to be duly executed as of the date first above
written.


                                  BORROWER:

                                  NEWPARK RESOURCES, INC.
                                  a Delaware corporation


                                  By:
                                     ----------------------------------------
                                     John R. Dardenne, Sr., Treasurer



                                      -8-
<PAGE>   31


                                  GUARANTORS:

                                  CHEMICAL TECHNOLOGIES, INC.,
                                  EXCALIBAR MINERALS, INC., NEWPARK
                                  ENVIRONMENTAL SERVICES, INC.,
                                  MALLARD & MALLARD OF LA., INC.,
                                  NEWPARK HOLDINGS, INC., NEWPARK
                                  DRILLING FLUIDS, INC., SUPREME
                                  CONTRACTORS, INC., AND BOCKMON
                                  CONSTRUCTION COMPANY, INC.


                                  By:
                                     ----------------------------------------
                                     John R. Dardenne, Sr., Treasurer


                                  NEWPARK ENVIRONMENTAL MANAGEMENT
                                  COMPANY, L.L.C., NEWPARK TEXAS,
                                  L.L.C., EXCALIBAR MINERALS OF LA.,L.L.C.
                                  AND SOLOCO L.L.C.


                                  By:
                                     ----------------------------------------
                                     John R. Dardenne, Sr., Treasurer


                                  BATSON-MILL, L.P., NEWPARK TEXAS DRILLING,
                                  FLUIDS L.P., NEWPARK ENVIRONMENTAL
                                  SERVICES OF TEXAS, L.P., NEWPARK
                                  SHIPHOLDING TEXAS, L.P., N.I.D., L.P.,
                                  SOLOCO TEXAS, L.P., NES PERMIAN BASIN, L.P.
                                  AND NEWPARK ENVIRONMENTAL SERVICES
                                  MISSISSIPPI, L.P.

                                  By:     Newpark Holdings, Inc., the general
                                          partner of each


                                     By:
                                        ----------------------------------------
                                        John R. Dardenne, Sr., Treasurer



                                      -9-
<PAGE>   32

                                  NDF MEXICO, INC.

                                  By: 
                                     -------------------------------------------
                                  Name:
                                       -----------------------------------------
                                  Title:
                                        ----------------------------------------


                                  BANKS:

                                  BANK ONE, LOUISIANA,
                                  NATIONAL ASSOCIATION,
                                  a national banking association


                                  By:
                                     -------------------------------------------
                                     Rose M. Miller, Vice President

                                  DEUTSCHE BANK A.G., NEW YORK BRANCH
                                  AND/OR CAYMAN ISLANDS BRANCH


                                  By: 
                                     -------------------------------------------
                                  Name:
                                       -----------------------------------------
                                  Title:
                                        ----------------------------------------


                                  By: 
                                     -------------------------------------------
                                  Name:
                                       -----------------------------------------
                                  Title:
                                        ----------------------------------------


                                  HIBERNIA NATIONAL BANK


                                  By: 
                                     -------------------------------------------
                                  Name:
                                       -----------------------------------------
                                  Title:
                                        ----------------------------------------



                                      -10-
<PAGE>   33

                                  AGENT:

                                  BANK ONE, LOUISIANA,
                                  NATIONAL ASSOCIATION,
                                  a national banking association


                                  By:
                                     -------------------------------------------
                                     Rose M. Miller, Vice President

                                  CO-AGENT:

                                  DEUTSCHE BANK A.G., NEW YORK BRANCH
                                  AND/OR CAYMAN ISLANDS BRANCH


                                  By: 
                                     -------------------------------------------
                                  Name:
                                       -----------------------------------------
                                  Title:
                                        ----------------------------------------


                                  By: 
                                     -------------------------------------------
                                  Name:
                                       -----------------------------------------
                                  Title:
                                        ----------------------------------------



                                      -11-

<PAGE>   1
                                                                   EXHIBIT 10.16

                      SETTLEMENT OF ARBITRATION AND RELEASE


                  This Settlement of Arbitration and Release (herein referred to
as "Release") is entered into by and between U.S. Liquids, Inc. (herein referred
to as "USL") and Newpark Resources, Inc. (herein referred to as "Newpark")
(collectively referred to as the "Parties") and each of its respective officers,
directors, employees, agents, attorneys, representatives, predecessors,
successors, and assigns, and each of its respective direct and indirect
corporate parents, subsidiaries, partners, affiliates, and joint venturers and
all of their respective officers, directors, employees, agents, attorneys,
representatives, predecessors, successors, and assigns, who are expressly
intended to be beneficiaries of this Settlement of Arbitration and Release.

                                    RECITALS

A.       WHEREAS, Newpark and USL each assumed the obligations and rights under
     a NOW Disposal Agreement dated June 4, 1996, which provided for the
     disposal of nonhazardous oilfield waste ("NOW"); and a Noncompetition
     Agreement dated August 12, 1996.

B.       WHEREAS, disputes arose with regard to the effect of certain events on
     Newpark's payment obligations under the NOW Disposal Agreement.

C.       WHEREAS, USL filed a Demand for Arbitration styled U.S. Liquids vs.
     Newpark Resources, Inc., Action No. 70 198 00220 98, In the Houston
     Regional Office of the American Arbitration Association (the
     "Arbitration").

D.       WHEREAS, the Parties desire to compromise and forever settle all
     matters in dispute between them of whatever kind and character for the
     cause of action asserted in the Arbitration identified in these Recitals
     and to enter into this Settlement of Arbitration and Release.

                             AGREEMENTS AND RELEASE

         In consideration of the foregoing and the mutual commitments specified
below, the receipt and adequacy of which are hereby acknowledged, the Parties to
this Release agree as follows:

         1. Termination of Agreements. A separate agreement captioned
"Miscellaneous Agreement" executed concurrently herewith sets forth the Parties'
understanding with respect to certain agreements to which Newpark is a party,
which were assumed by USL in connection with Asset Purchase Agreement dated
December 2, 1996, by and among (i) SANIFILL, INC., a Delaware corporation
("Sanifill"), CAMPBELL WELLS, L.P., a Delaware limited partnership also known as
CAMPBELL WELLS, LTD. ("Campbell"), and CAMPBELL WELLS NORM, L.P., a Delaware
limited partnership ("Campbell Wells NORM") (collectively, "Sellers") and (ii)
USL, as "Buyer." By the execution of this Release, the Parties agree that the
following described agreements are terminated solely with respect to the rights,



<PAGE>   2

interests and obligations of USL effective September 16, 1998, to the extent
provided in the Miscellaneous Agreement: 

                  a. An Agreement captioned "NOW Disposal Agreement" entered
into June 4, 1996, by and between Sanifill, Inc., NOW Disposal Operating Company
and Campbell Wells, Ltd.; and

                  b. An Agreement captioned "Noncompetition Agreement" dated
August 12, 1996, by and between Sanifill, Inc. and Newpark.

         2. Execution of Agreements. By the execution of this Settlement of
Arbitration and Release, the Parties agree to execute and deliver the following
described agreements:

                  a. An Agreement captioned "NOW Payment Agreement" and attached
hereto;

                  b. An Agreement captioned "Noncompetition Agreement" and
attached hereto;

                  c. An Agreement captioned "Asset Purchase Agreement" and
attached hereto; and

                  d. An Agreement captioned "Miscellaneous Agreement" and
attached hereto.

         3. Dismissal of Arbitration. USL, acting by and through its attorney,
agrees to procure either the dismissal with prejudice of the arbitration
complaint filed against Newpark in the Houston Regional Office of the American
Arbitration Association ("AAA"), being Action No. 70 198 00220 98, with each
party to bears its costs and attorneys' fees therein, or a written confirmation
from the AAA that the same has already been dismissed on such basis. To
implement this provision, the Parties agree that they shall, subsequent to the
effective date of this Agreement, themselves do, and cause their respective
attorneys to do, all things and sign all documents which are reasonable and
necessary to carry out and effectuate the foregoing.

         4. Release. USL shall and hereby does completely release, acquit, and
discharge Newpark (and each of Newpark's officers, directors, employees, agents,
attorneys, representatives, predecessors, successors, and assigns as well as all
of Newpark's present and former direct and indirect corporate parents,
subsidiaries, partners, affiliates, and joint venturers and all of their
respective officers, directors, employees, agents, attorneys, representatives,
predecessors, successors, and assigns) of and from the cause of action asserted
in the Arbitration up to and including the date of this Release; namely, the
failure by Newpark to either deliver the minimum volume of nonhazardous oil
field waste required by the NOW Disposal Agreement or pay the minimum amount to
which USL was entitled under the NOW Disposal Agreement, up to and including the
date of this Release.


<PAGE>   3

         5. No Admission of Liability. Recitals of fact and representations made
herein and any consideration provided are not to be construed as an admission of
liability on the part of any party hereto, and Newpark expressly denies any
liability whatsoever to USL.

         6. No Assignments. USL represents and warrants that it has not
assigned, pledged, encumbered, or otherwise in any manner whatsoever sold or
transferred, either by instrument in writing or otherwise, any right, claim,
cause of action, title, interest, lien, or security interest released herein or
relating in any way to the claims that were or could have been asserted in the
Arbitration. USL further represents and warrants that it is fully authorized and
empowered to fully release and extinguish the claim that has been asserted in
the Arbitration.

         7. No Representations. This Release is entered into with full knowledge
of any and all rights which the Parties may have by reason of the pending
Arbitration. The Parties have received independent legal advice, have conducted
such investigation as each of them and its respective counsel thought
appropriate, and have consulted with such other independent advisors as each of
them and its respective counsel deemed appropriate regarding the Release and its
rights and asserted rights in connection therewith. None of the Parties is
relying upon any representations or statements made by any other party, or such
other party's employees, agents, representatives or attorneys, regarding this
Release or its preparation except to the extent such representations are
expressly incorporated herein. None of the Parties is relying upon a legal duty,
if one exists, on the part of any other party (or such other party's employees,
agents, representatives, or attorneys) to disclose any information in connection
with the execution of this Release or its preparation, it being expressly
understood that no party shall ever assert any failure to disclose information
on the part of any other party as a ground for challenging this Release.

         8. Counterparts. This Release may be executed in one or more
counterparts, each of which shall be deemed an original, but all of which
together shall constitute one and the same instrument. When signed by each of
the Parties hereto, this Release shall be binding upon and inure to the benefit
of each party to this Release, and its respective successors, assigns,
receivers, trustees, executors, administrators, heirs, beneficiaries, or other
legal representatives.

         9. Construction. The language used in this Release will be deemed to be
the language chosen by the Parties to express their mutual intent, and no rule
of strict construction shall be applied against any party. Any reference to any
federal, provincial, state, local, or foreign statute or law shall be deemed
also to refer to all rules and regulations promulgated thereunder.

         10. Superseding Effect. This Release supersedes any and all other
representations, discussions, or agreements concerning settlement, either oral
or in writing, between USL and Newpark.

         11. Enforcement Action. In any action brought to enforce this Release,
the prevailing party shall be entitled to recover from the unsuccessful party
its reasonable attorneys' fees, costs, and disbursements.

         12. Venue. Any action brought to enforce this Release must be filed in
Texas state court in Harris County.


<PAGE>   4


         13. GOVERNING LAW. THE INTERPRETATION AND CONSTRUCTION OF THIS RELEASE
AND ANY AMENDMENT HEREOF, AND WAIVERS AND CONSENTS HEREUNDER, SHALL, TO THE
EXTENT THE PARTICULAR SUBJECT MATTER IS CONTROLLED BY STATE LAW, BE GOVERNED BY
AND BE CONSTRUED IN ACCORDANCE WITH THE SUBSTANTIVE LAW OF THE STATE OF TEXAS
WITHOUT REGARD TO CONFLICTS OF LAW PRINCIPLES.

         ON THIS DATE, the Parties have executed multiple originals of this
Settlement of Arbitration and Release.

                                       NEWPARK RESOURCES, INC.



Dated:                                 By:
      -------------------------           ---------------------------------
                                       Name:
                                            -------------------------------
                                       Title:
                                             ------------------------------


Dated:                     
      -------------------------        
                                       Bertram K. Massing
                                       Attorney for Newpark Resources, Inc.



                                       U.S. LIQUIDS, INC.



Dated:                                 By:
      -------------------------           ---------------------------------
                                       Name:
                                            -------------------------------
                                       Title:
                                             ------------------------------



Dated:                     
      -------------------------
                                       Philip J. John
                                       Attorney for U.S. Liquids, Inc.




<PAGE>   1
                                                                   EXHIBIT 10.17

                                PAYMENT AGREEMENT

                  This Payment Agreement (the "Agreement") is made and entered
into this 31st day of December, 1998, by and among U.S. Liquids, Inc. ("U.S.
Liquids" or "USL"), a Delaware corporation, Newpark Resources, Inc., a Delaware
corporation ("Newpark"), and Newpark Environmental Services, Inc. ("NESI"), a
Delaware corporation and wholly owned subsidiary of Newpark (i) to amend and
restate in its entirety the NOW Payment Agreement dated September 16, 1998 (as
amended effective September 22, 1998, the "NOW Payment Agreement"), by and
between NESI and USL and (ii) to amend certain other agreements referred to
herein.

                  WHEREAS the parties to this Agreement agree that, among the
purposes of this Agreement, the NOW Payment Agreement and the other agreements
described herein were and are: (i) cancellation of the waste disposal
obligations of NESI and Newpark under NOW Disposal Agreement (the "Disposal
Agreement") dated as of June 4, 1996, by and among Sanifill, Inc., a Delaware
corporation ("Sanifill"), Campbell Wells, Ltd., a Delaware limited partnership
("Campbell"), and NOW Disposal Operating Co., a Delaware corporation
("Disposeco"), and the Assumption and Guaranty Agreement dated as of August 12,
1996, by and among Newpark, Sanifill and Campbell; (ii) termination of any
obligation of Newpark and NESI to USL extending beyond the term of this
Agreement; (iii) establishment of fair compensation to USL for, among other
things, such cancellation and termination; and (iv) modification of certain
obligations of USL to Newpark and NESI, including but not limited to its
non-competition obligation, based on such cancellation and termination.

                  WHEREAS, concurrently with the execution and delivery of the
NOW Payment Agreement, the parties have executed and delivered the following
agreements (the "Other Agreements") in connection with the execution and
delivery of the NOW Payment Agreement: NESI and USL executed and delivered (a)
Asset Purchase Agreement dated September 16, 1998 (as amended as of September
22, 1998, the "Purchase Agreement"); and Newpark and USL executed and delivered
(b) Settlement of Arbitration and Release dated September 17, 1998 (the
"Release"); (c) Noncompetition Agreement dated September 16, 1998 (the
"Noncompetition Agreement"); and (d) Miscellaneous Agreement dated September 16,
1998 (the "Miscellaneous Agreement").

                  NOW, THEREFORE, in consideration of the above premises and the
mutual covenants and promises contained herein, and for other good and valuable
consideration, the receipt and sufficiency of which are hereby acknowledged, the
parties hereby agree as follows:

                                    ARTICLE I
                                   DEFINITIONS

                  For purposes of this Agreement, the following terms shall have
the following meanings (unless indicated otherwise, all Article and Section
references are to Articles and Sections in this Agreement):

                  Adjustment Date:  January 3, 2000.



<PAGE>   2

                 Affiliate: A Person that directly, or indirectly through one
or more intermediaries, controls, is controlled by or is under common control
with the Person specified. For purposes of this definition, the term "control"
(including the terms "controlling," "controlled by" and "under common control
with") of a Person means the possession, direct or indirect, of the power to (i)
vote 50% or more of the voting interests in such Person or (ii) direct or cause
the direction of the management and policies of such Person, whether by contract
or otherwise.

                  Annual Volume: For any Contract Year, the maximum volume of
NOW permitted to be delivered by or on behalf of NESI at no cost and accepted
for disposal by USL, which volume shall be 375,000 barrels of NOW for the first
Contract Year, 500,000 barrels of NOW for the second Contract Year and 500,000
barrels of NOW for the third Contract Year.

                  Base Rate: The number reflecting the most current measure of
the Consumer Price Index in effect as of the Effective Date. The Base Rate shall
be 146.4.

                  Collection: The collection, transfer or transportation of NOW.

                  Consumer Price Index: The number reflecting the measure of the
average change in prices over time of certain goods and services purchased by
all urban consumers in the Houston Area, as compiled and reported every
even-numbered month by the United States Department of Labor, Bureau of Labor
Statistics. On the Adjustment Date, the Consumer Price Index shall be the number
last reported and in effect as of that date. If the Consumer Price Index as
defined becomes unavailable, the parties shall use the number last reported as a
measure of the average change in prices of goods and services purchased by all
urban consumers in (i) the State of Texas or, in the event that number is
unavailable, (ii) the United States.

                  Contract Year: Twelve-month period commencing each July 1
during the term of this Agreement.

                  Covered Region: The States of Louisiana, Texas, Mississippi
and Alabama, and the Gulf of Mexico.

                  Disposal:  The treatment or disposal of NOW.

                  Effective Date: July 1, 1998.

                  Excluded NOW: NOW generated and collected on land and
delivered to a Landfarm from the site where it was generated entirely by on-land
transportation.

                  Landfarms: The NOW disposal facilities owned and operated by
USL designated as Elm Grove, LA (DNR Permit #OWD 89-1) (the "Elm Grove
Landfarm"); Bourg, LA (DNR Permit #90-10 OWD) (the "Bourg Landfarm"); Bateman
Island, LA (DNR Permit #91-10 OWD) (the "Bateman Island Landfarm"); and
Mermentau, LA (DNR Permit #SWD 83-6) (the "Mermentau Landfarm").

                  NOW: Nonhazardous oilfield waste (including Washwater)
associated with the exploration and production of oil, gas and geothermal energy
that contains less than 30 picocuries



<PAGE>   3

per gram of Radium 226 or 228. Without limiting the generality of the foregoing,
for waste disposed of in Louisiana, the term NOW shall include all wastes
containing less than 30 picocuries per gram of Radium 226 or 228 classified as
NOW under Louisiana Statewide Order 29-B, as currently in effect, and all waste
that is classified as "E&P Waste" by the Louisiana Department of Natural
Resources.

                  Payment in Full and on Time: Payment or reimbursement made to
USL on or before any date specified for such payment in this Agreement except
and unless timely paid in accordance with Section 13.6.

                  Person: Any individual, corporation, association, partnership,
joint venture, trust, estate or other entity or organization or government or
any agency or political subdivision thereof.

                  Quarter: Calendar three-month period commencing each January
1, April 1, July I and October 1.

                  Washwater: Fluids generated by the cleaning and/or
decontamination of tanks, barges, vessels, containers or other similar
structures used in the storage and/or transportation of NOW. Washwater may
contain cleaning agents and emulsifiers, etc., in addition to the basic cleaning
agent (water).

                  Zapata Facility: A NOW disposal facility owned and operated by
USL located near Zapata, Texas.

                                   ARTICLE II
                                     PAYMENT

         2.1      Initial Payment. NESI shall pay USL $4 million as follows: (a)
$3 million due before the close of business on September 22, 1998, and (b) 
$1 million due on or before October 1, 1998.

         2.2      Additional Payments.

                  2.2.1 First Contract Year. Separate from and in addition to
         its obligations under Section 2.1, NESI shall make an additional
         payment to USL in the total amount of $8 million for the first Contract
         Year except as provided in Section 12.1. NESI shall pay USL $1 million
         of the aforesaid additional payment on each of the following eight
         occasions: November 2, 1998, December 1, 1998, January 4, 1999,
         February 1, 1999, March 1, 1999, April 1, 1999, May 1, 1999, and June
         1, 1999, except as provided in Section 12.1. Failure to make Payment in
         Full and on Time under this Section constitutes a breach of this
         Agreement.

                  2.2.2    Second Contract Year.

         a.       The additional payment owed for the second Contract Year shall
                  total $10 million except as provided in Section 12.1, subject
                  to adjustment as provided in Section



<PAGE>   4

                  2.2.2b. The additional payment for the first and second
                  Quarters of the second Contract Year shall total $5 million
                  except as provided in Section 12.1. During the first and
                  second Quarters of the second Contract Year, NESI shall pay
                  such additional payment in six equal monthly installments due
                  on or before July 1, 1999, August 2, 1999, September 1, 1999,
                  October 1, 1999, November 1, 1999, and December 1, 1999,
                  respectively, except as provided in Section 12.1.

         b.       On the Adjustment Date, January 3, 2000, the additional
                  payment for the remainder of the second Contract Year shall be
                  adjusted by (i) adding to the Base Rate 70% of the positive
                  amount, if any, determined by subtracting the Base Rate from
                  the Consumer Price Index in effect on the Adjustment Date,
                  (ii) dividing said sum by the Base Rate and (iii) multiplying
                  the result by $5 million, except as provided in Section 12.l.
                  In the event that the net change in the Consumer Price Index
                  is negative, the additional payment for the third and fourth
                  Quarters of the second Contract Year shall total $5 million
                  except as provided in Section 12.1. NESI shall pay the
                  remainder of such additional payment for the second Contract
                  Year in six equal monthly installments due on or before
                  January 1, 2000, February 1, 2000, March 1, 2000, April 3,
                  2000, May 1, 2000, and June 1, 2000, respectively, except as
                  provided in Section 12.1. Failure to make Payment in Full and
                  on Time under this Section constitutes a breach of this
                  Agreement.

                  2.2.3 Third Contract Year. The additional payment owed for the
third Contract Year shall total $8 million except as provided in Section 12.1,
subject to adjustment as provided in the following sentence. On the Adjustment
Date, January 3, 2000, the additional payment for the third Contract Year shall
be adjusted by (i) adding to the Base Rate 70% of the positive amount, if any,
determined by subtracting the Base Rate from the Consumer Price Index in effect
on the Adjustment Date, (ii) dividing said sum by the Base Rate, and (iii)
multiplying the results by $8 million except as provided in Section 12.1. In the
event that the net change in the Consumer Price Index is negative, the
additional payment for the third Contract Year shall total $8 million, except as
provided in Section 12.1. NESI shall pay such additional payment in twelve equal
monthly installments due on or before July 3, 2000, August 1, 2000, September 1,
2000, October 2, 2000, November 1, 2000, December 1, 2000, January 2, 2001,
February 1, 2001, March 1, 2001, April 2, 2001, May 1, 2001, and June 1, 2001,
respectively, except as provided in Section 12.1. Failure to make Payment in
Full and on Time under this Section constitutes a breach of this Agreement.

         2.3 Obligation to Pay. NESI's obligation to make Payment in Full and on
Time where required by any Section in this Agreement exists without regard to
whether NESI exercises its option to deliver NOW, if any, to USL in accordance
with Section 3.1. Failure to make Payment in Full and on Time in every instance
for any reason whatsoever constitutes a breach of this Agreement and shall not
entitle NESI to any offsets, carryovers, or counterclaims of any kind.


<PAGE>   5



                                   ARTICLE III
                                 DISPOSAL VOLUME

         3.1      NOW Delivery.

                  3.1.1    Delivery Option.

         a.       NESI may, at its option, deliver to USL for disposal at the
                  Bateman Island Landfarm a maximum amount of NOW equal to the
                  Annual Volume for such Contract Year at no cost without prior
                  notice or approval. Subject to the terms and conditions and
                  the limitations set forth in this Agreement, USL shall accept
                  for disposal at the Bateman Island Landfarm all NOW delivered
                  by or on behalf of NESI, provided, however, that in no event
                  shall USL be obligated to accept from NESI for disposal at any
                  Landfarm more than the Annual Volume during any Contract Year.
                  Failure to deliver the full Annual Volume shall not result in
                  any carryforward or increase in the Annual Volume in the
                  succeeding Contract Year.

         b.       NESI shall have the right to deliver a volume no more than 10%
                  of the Annual Volume to the Bourg Landfarm at no cost, subject
                  to Section 3.1.l.a, and prior notice by NESI in accordance
                  with Section 13.5.2, of 48 hours if such delivery shall arrive
                  by marine transportation; or

         c.       NESI shall have the right to deliver a volume no more than 10%
                  of the Annual Volume to the Mermentau Landfarm at no cost,
                  subject to Section 3.1.1.a and prior written approval by USL,
                  which approval will not be unreasonably withheld.

                  3.1.2 Obligation to Pay. NESI is obligated to pay the
additional payments required under Article II regardless of the volume of NOW,
if any, delivered to or accepted by USL in accordance with this Section 3.1,
except as provided in Section 12.1. Failure by NESI to exercise its option to
deliver NOW to USL for disposal shall not alter, lessen, decrease, alleviate, or
relieve NESI of its obligation to pay USL in accordance with Article II. NESI
shall make all payments in accordance with Article II without regard to the
volume of NOW, if any, offered or delivered to USL for disposal.

         3.2      Variance. The parties agree to cooperate to minimize monthly
and quarterly variances in NOW, if any, delivered for disposal at the Landfarms,
in order to avoid disruption of or problems in USL's operations.

         3.3      Excess Volume.

                  3.3.1 Acceptance Option. During any Contract Year, USL has the
option, but not the obligation, to accept for disposal an amount of NOW from
NESI in excess of the Annual Volume (the "Excess Volume"). USL may decline to
accept Excess Volume for any reason. Should USL exercise its option to accept
delivery of an amount of Excess Volume of NOW, NESI agrees to pay the "Excess
Volume Rate" (as defined below) for disposal of the Excess Volume. In the event
USL elects not to accept NOW delivered by NESI in excess of the Annual Volume
during any Contract Year for any reason, including but not limited to rejection
in


<PAGE>   6

accordance with Section 6.6 of this Agreement, such election shall not cause (i)
the Annual Volume for any Contract Year to increase or (ii) the payments
required under this Agreement to decrease.

                  3.3.2    Excess Volume Rate.

         a. First Contract Year. The rate for disposal of Excess Volume of NOW
(the "Excess Volume Rate") for the first Contract Year shall be $2.86 per
barrel, net of all currently applicable taxes. The Excess Volume Rate shall
never be less than $2.86 per barrel of NOW during the term of this Agreement.

          b. Adjustment of Prevailing Rate. On the Adjustment Date, January 3,
2000, the Excess Volume Rate shall be adjusted by (i) adding to the Base Rate
70% of the positive amount, if any, determined by subtracting the Base Rate from
the Consumer Price Index as of the Adjustment Date, (ii) dividing said sum by
the Base Rate, and (iii) multiplying the result by $2.86. If the net change in
the Consumer Price Index is negative, then the Prevailing Rate shall be $2.86
per barrel of Excess Volume of NOW until June 30, 2001.

                  3.3.3    Invoice for Excess Volume: USL shall invoice NESI for
fees incurred from the disposal of Excess Volume of NOW, to be paid no later
than 30 days from receipt of the invoice. Failure to pay USL in accordance with
the terms of the invoice shall constitute a breach of this Agreement.

         3.4 Radium Concentration. Notwithstanding anything contained in this
Agreement to the contrary, USL shall not be obligated to accept NOW from NESI at
any Landfarm where such NOW (i) when combined with other NOW in an individual
treatment cell, would cause the weighted average concentration of Radium 226 or
228 to exceed 5 pCi/gm, excluding background, or (ii) would require the loading
of two or more treatment cells simultaneously to prevent the weighted average
concentration of Radium 226 or 228 from exceeding 5 pCi/gm, excluding
background. In the event NESI delivers NOW contravening the foregoing sentence,
USL shall have the right, but not the obligation, to reject such NOW in
accordance with Section 6.6.

                                   ARTICLE IV
                        SERVICES, LEVIES, AND INSPECTION

         4.1 Additional Services; Disposal of Injectable Saltwater. Pursuant to
this Agreement, USL will perform standard off-loading and customary handling
services associated with disposal of NOW up to, and including, the Annual Volume
at no additional charge. USL will perform additional services upon request of
NESI at the usual and customary rates of USL for such services, or at such other
rates as the parties may mutually agree upon. All charges for such additional
services shall be in addition to and independent of the other payments due in
accordance with this Agreement. USL will accept injectable saltwater at the
Landfarms for disposal upon request of NESI at the usual and customary rates of
USL for disposal of injectable saltwater, or at such other rates as the parties
may mutually agree upon. All charges for disposal of injectable saltwater shall
be in addition to and independent of the other amounts which are payable
pursuant to this Agreement.





<PAGE>   7

         4.2      Disposal of Washwater. NESI shall pay USL to dispose of
Washwater at the rate of $1.50 per barrel of Washwater. On the Adjustment Date,
the rate shall be adjusted by (i) adding to the Base Rate 70% of the positive
amount, if any, determined by subtracting the Base Rate from the Consumer Price
Index as of the Adjustment Date, (ii) dividing said sum by the Base Rate, and
(iii) multiplying the result by $1.50. If the net change in the Consumer Price
Index is negative, then the rate for disposal of Washwater shall be $1.50 per
barrel. The disposal of Washwater shall be for the benefit of NESI, and USL
shall provide NESI with billing information specified by NESI to enable NESI to
bill the customer or customers for whose account any related cleaning services
were performed.

         4.3      Invoice for Additional Services: USL shall invoice NESI on a
monthly basis for fees or expenses incurred from any services performed pursuant
to Section 4.1 or 4.2 to be paid no later than 30 days from receipt of the
invoice. Failure to pay USL in accordance with the terms of the invoice shall
constitute a breach of this Agreement.

         4.4      Extraordinary Levies.

                  4.4.1 Taxes. Notwithstanding anything to the contrary
contained herein, if during the term of this Agreement there is levied upon USL
or any of its Affiliates or upon the operations of USL any tax, fee, assessment,
or other charge (other than income taxes applicable generally) by any
governmental authority, which tax, assessment or charge increases USL's costs to
operate any Landfarm, USL shall notify NESI of the cause and the per barrel
amount of the cost increase. If NESI chooses to deliver NOW to USL following the
effectiveness of the tax, fee, assessment or other charge, USL will invoice NESI
for and NESI will be obligated to pay NESI's share of the cost increase for so
long as such tax, fee, assessment or other charge remains in effect as follows:
(i) with respect to any cost increase resulting from any tax, fee, assessment or
other charge levied by a governmental authority on a per barrel basis, an amount
determined by multiplying such per barrel charge (but not more than the increase
in cost resulting therefrom) by the number of barrels of NOW delivered by NESI
to USL; and (ii) with respect to any tax, fee, assessment or other charge levied
by a governmental authority on any basis other than per barrel, NESI's
proportionate share of the cost increase resulting from such tax, fee,
assessment or charge. NESI's proportionate share shall be calculated as follows:
(a) if such tax, fee, assessment or other charge increases the cost to operate
the Bateman Island Landfarm, the NESI's proportionate share shall be calculated
by (i) dividing the number of barrels of NOW delivered to USL by NESI by the
Annual Volume plus the total number of barrels of Excess Volume, if any,
delivered to USL by NESI and accepted by USL and (ii) multiplying the result by
the amount of the cost increase resulting from the tax, fee, assessment, or
other charge; (b) if such tax, fee, assessment or other charge increases the
cost to operate the Bourg and/or Mermentau Landfarm, then NESI's proportionate
share shall be calculated by (i) dividing the number of barrels of NOW delivered
to USL by NESI to that Landfarm by the total number of barrels delivered to that
Landfarm by all Persons and (ii) multiplying the result by the amount of the
cost increase at that Landfarm resulting from the tax, fee, assessment, or other
charge. Such payment or reimbursement shall not alter the Annual Volume or the
other payments that are due pursuant to this Agreement.

                  4.4.2 Landfarm Environmental Regulations. Notwithstanding
anything to the contrary contained herein, if during the term of this Agreement
there is a substantial change in 



<PAGE>   8

regulatory requirements related to the waste disposal business having general
applicability to the handling, treatment or disposal of NOW, which change
increases in a material manner USL's costs to operate any Landfarm, (i) USL
shall notify NESI of the cause and the per barrel amount of the cost increase
and, to the extent that NESI chooses to deliver NOW to USL, (ii) USL will
invoice NESI for NESI's proportionate share of the cost increase and NESI will
be obligated to pay such amount so long as such cost increase remains in effect.
NESI's proportionate share shall be calculated as follows: (a) if such change in
regulatory requirements increases costs to operate the Bateman Island Landfarm,
then NESI's proportionate share shall be calculated by (i) dividing the number
of barrels of NOW delivered to USL by NESI by the Annual Volume plus the total
number of barrels of Excess Volume, if any, delivered to USL by NESI and
accepted by USL and (ii) multiplying the result by the amount of the cost
increase; (b) if such change in regulatory requirements increases costs to
operate the Bourg and/or Mermentau Landfarm, then NESI's proportionate share
shall be calculated by (i) dividing the number of barrels of NOW delivered to
USL by NESI to that Landfarm by the total number of barrels delivered to that
Landfarm by all Persons and (ii) multiplying the result by the amount of the
cost increase at that Landfarm. Failure to pay USL in accordance with the terms
of the invoice shall constitute a breach of this Agreement.

                  4.4.3 Right of Inspection. In the event USL notifies NESI of a
cost increase pursuant to this Section 4.4, NESI shall have the right to conduct
a reasonable review of the calculations, working papers and the books and
records related to the determination of such fee increase. All costs of such
review shall be borne exclusively by NESI.

                                    ARTICLE V
                                      TERM

         5.1 Term. The term of this Agreement shall be for a period of three
years, commencing on the Effective Date and ending on June 30, 2001. Each party
shall notify the other of the pending expiration of the Agreement no later than
seven months before such expiration.

         5.2 Effect of Breach of Noncompetition Agreement. If USL breaches the
Noncompetition Agreement by engaging in the "Business," as that term is defined
therein, after the Effective Date, USL must pay to NESI any and all revenues
received from activities that constitute such breach. Breach of the
Noncompetition Agreement shall have no effect whatsoever on NESI's payment
obligations under this Agreement. USL shall use all reasonable commercial
efforts to enforce the Seller Noncompetition Agreement and the Buyer
Noncompetition Agreement, both dated December 13, 1996 by and between Sanifill
and USL.

                                   ARTICLE VI
                              OPERATING PROCEDURES

         6.1 Compliance with Operating Procedures. NESI and its Affiliates shall
comply in all material respects with and abide by, and shall require their
employees, servants, agents, representatives, contractors, subcontractors,
haulers and transporters to comply in all material respects with and abide by,
all applicable federal, state and local laws, ordinances, permits, regulations,
directives, codes, standards and requirements relating to the subject matter of
this Agreement or the performance of services hereunder, as well as all of USL's
rules, regulations,



<PAGE>   9

procedures and guidelines, written or oral, as the same may be reasonably
adopted and modified from time to time, including, without limitation, all
safety and/or security regulations, practices and procedures, and all procedures
reasonably adopted by USL in compliance with its permits or utilized by USL in
the inspection, sampling and testing of material delivered to any Landfarm for
disposal.

         6.2 Inspection and Testing by NESI; Notification. NESI agrees that it
shall inspect and test all materials accepted, acquired, taken possession of,
procured, directed, controlled or otherwise received by it from third party
generators or other parties for disposal (with the exception of any NOW produced
by third-party generators which NESI or its Affiliates treat and dispose of on
the site at which the NOW was generated) to the extent required by applicable
federal, state and local laws, ordinances, permits, regulations, directives,
codes, standards and requirements. NESI shall promptly notify USL if it becomes
aware of any unusual or special characteristics of any materials being delivered
to any Landfarm which cause such materials to require special treatment,
handling or care. Upon request by USL, NESI shall provide copies of all
inspection and test results relating to material to be disposed of at any
Landfarm under the terms of this Agreement to USL upon delivery.

         6.3 Shipment and Delivery of NOW. NESI, its Affiliates and/or its
contractors and subcontractors shall be responsible for proper containerization,
preparation and labeling for shipment, shipment, transportation and delivery to
any Landfarm, and shall comply fully with all applicable federal, state and
local laws, ordinances, permits, regulations, directives, codes, standards and
requirements in making such delivery to any Landfarm. USL and its Affiliates
undertake no responsibility whatsoever for the preparation, handling or
transportation of any material prior to acceptance of delivery as hereinafter
provided.

         6.4      Inspections.

                  6.4.1 Barges. Upon arrival of any barge transporting material
to a Landfarm at the direction of NESI or any of its Affiliates, USL shall have
the right to have an independent third party inspector selected by USL undertake
an inspection of the barge transporting material to the Landfarm for the purpose
of determining (a) the volume of materials delivered and (b) the condition of
the barge on arrival at the Landfarm. The costs of such inspector shall be split
evenly between NESI and USL, and NESI's portion of such expense shall be
included on the monthly invoices prepared by USL in accordance with Section 4.3.
Before any materials are off-loaded from the barge or any inspection or testing
is undertaken by USL, the independent inspector will provide the authorized
representatives of NESI and USL with an inspector's report indicating the time
and date, the barge identification number and volume of waste materials in the
barge. The authorized representatives of the parties will indicate their
acceptance of the inspector's report by signing the report. In the event either
authorized representative disagrees with the volume determination, either
authorized representative may request that an additional independent third-party
inspector prepare an inspector's report, the cost of which shall be borne by the
party requesting the same. If the parties are unable to agree on the actual
volume of waste after the preparation of the second inspector's report, the two
independent inspectors shall select a third independent inspector to prepare an
inspector's report, the cost of which will be borne half by NESI and half by
USL. The final volume determination shall be that volume agreed upon by the
majority of the independent inspectors that have inspected the barge. If the
barge appears to be 



<PAGE>   10

damaged in any significant respect, the inspector shall summarize the apparent
damage and take photographs as appropriate to evidence the scope of the damage.
The authorized representative of NESI shall approve such damage summary by
executing the same prior to the time any material is off-loaded from the barge.
With regard to barges owned and operated by NESI, USL agrees that it shall not
exercise its right to implement the procedures set forth in this Section 6.4.1
unless the parties have previously had a dispute or disagreement relating to the
quantity of materials delivered to a Landfarm by NESI or the condition of a
barge owned and operated by NESI and such dispute or disagreement was not
amicably resolved within 30 days.

                  6.4.2 Trucks. Upon arrival of a truck transporting material to
a Landfarm on behalf of NESI or any of its Affiliates, USL personnel shall
undertake an inspection to determine the volume of materials delivered. Before
any materials are off-loaded from the truck or any inspection or testing is
undertaken by USL, USL shall prepare a receipt indicating the time and date and
the volume of materials in the truck. The driver of the truck shall indicate his
or her acceptance of the receipt by signing the receipt. In the event the driver
disagrees with the volume determination, USL shall have the option of (i)
accepting the volume stated by the driver and preparing a receipt evidencing
such volume to be signed by the driver or (ii) rejecting such materials in
accordance with Section 6.6.

         6.5 Inspection and Testing of Material. After all inspections, if any,
pursuant to Section 6.4 have been concluded, USL shall conduct inspections,
testing and sampling using such equipment and procedures as are required by or
consistent with its permits. USL may rely exclusively on the results of its
inspection in determining whether materials delivered may be disposed at the
Landfarm in accordance with its permits and this Agreement. NESI authorizes USL
to retain samples and all data relating thereto, including test results, for so
long as required by federal, state or local law, ordinance, permit, regulation,
directive, code, standard or requirement and additionally for so long as USL in
its sole discretion shall determine.

         6.6      Acceptance or Rejection of Material.

                  6.6.1 Acceptance. USL shall only be obligated to accept waste
materials at the Landfarm which are permissible under the permit requirements of
that Landfarm at the time of delivery. For a period of ten days after the date
of delivery, USL shall have the right to reject (or revoke any prior acceptance)
all or any part of a shipment of material delivered by or on behalf of NESI to
the Landfarm if (i) such material is not in accordance with the terms of this
Agreement or (ii) USL concludes that such material exceeds the parameters of the
permits applicable to the Landfarm. USL shall notify NESI of any rejection in
writing and shall state the reason therefor. The expiration of such ten-day
period without a rejection or a revocation of a prior acceptance of material
shall constitute "Final Acceptance" of such material.

                  6.6.2 Rejected Material. Rejected material shall remain at
NESI's risk and expense and shall not be deemed to be incorporated into the
Landfarm or come under the possession, custody, control or ownership of USL.
Notwithstanding the foregoing, to the extent required by federal, state or local
law, ordinance, permit, regulation, directive, code, standard or requirement, or
by USL's safety and/or security rules, practices or procedures, USL may detain
any rejected materials, including the vehicle and/or containers in which such
rejected materials



<PAGE>   11

arrived, and shall notify regulatory or other authorities wherever necessary or
appropriate to do so.

                  6.6.3 Removal. In the event USL rejects all or any part of a
shipment of material from NESI, after compliance in all material respects with
all regulatory and any other requirements involving detention of such shipment,
upon written request of USL, NESI, unless otherwise directed by a regulatory
agency or other lawful authority, shall promptly remove or cause to be removed
from the Landfarm all of the rejected material at NESI's risk and expense in a
manner consistent with all applicable federal, state and local laws, ordinances,
permits, regulations, directives, codes, standards and requirements. In the
event NESI fails to complete such removal by the fifth business day after the
date of the request by USL, USL, unless otherwise required by law or regulation,
may remove or cause to be removed from the Landfarm any and all of the rejected
material, and may containerize and transport it or cause it to be containerized
and transported to an authorized storage site or returned to NESI at its nearest
location. NESI hereby authorizes USL in such event to contract for such storage
for NESI's account. For its services, USL shall charge and NESI shall pay USL's
cost plus 15%. Any and all material that USL rejects shall remain property and
the responsibility of NESI at NESI's risk and expense.

         6.7 Third-Party Deliveries. USL may follow the procedures set forth in
this Article VI with respect to any third-party generator's vessels or vehicles
containing materials that are delivered to any Landfarm at the direction of NESI
or its Affiliates. In addition, USL may establish and enforce other policies and
procedures relating to the independent inspection of any such third-party
generator's vessels or vehicles before the material contained in such vessels or
vehicles shall be accepted for disposal.

                                   ARTICLE VII
                COVENANTS, REPRESENTATIONS AND WARRANTIES OF NESI

         NESI hereby covenants, represents and warrants to USL as follows:

         7.1 Authorization and Validity of Agreement. NESI has all requisite
power and authority to enter into this Agreement and to perform its obligations
hereunder and consummate the transactions contemplated hereby. The execution,
delivery and performance by NESI of this Agreement and the consummation of the
transactions contemplated hereby have been duly authorized by all necessary
action on the part of NESI. No action or approval of the equity owners of NESI
is necessary to authorize NESI's execution or delivery of, or the performance of
its obligations under, this Agreement. This Agreement has been duly executed and
delivered by NESI and is a valid and binding obligation of NESI, enforceable in
accordance with its terms.

         7.2 No Conflict. The execution and delivery by NESI of this Agreement
does not, and exercise by NESI of its rights hereunder and the consummation of
the transactions contemplated hereby will not, (a) require any consent,
approval, order or authorization of or other action by any governmental entity
on the part of or with respect to NESI; (b) require on the part of NESI any
consent by or approval of or notice to any other Person; or (c) result in a
violation of any law, rule, regulation, order, judgment or decree applicable to
NESI, except in any case covered by (a),



<PAGE>   12

(b) or (c) where failure to obtain such consent or such violation would not,
either individually or in the aggregate, have a material adverse effect on the
transactions contemplated hereby.

         7.3 Licensed Carriers. Any carrier with which NESI contracts to
transport NOW and all of NESI's driver personnel shall at all times relevant to
the performance of services under this Agreement remain properly licensed and
otherwise fully qualified to perform the services required hereunder.

         7.4 Customer Approval. NESI's obligations under this Agreement shall
not be affected in any way by the approval, disapproval, recommendation,
instruction, direction or other communication between NESI and its customers,
including any request by any NESI customer as to where its waste should be
delivered. NESI shall remain responsible for payment under this Agreement
without reference or regard to NESI's customers.

                                  ARTICLE VIII
                COVENANTS, REPRESENTATIONS AND WARRANTIES OF USL

         USL hereby covenants, represents and warrants to NESI as follows:

         8.1 Authorization and Validity of Agreement. USL has all requisite
power and authority to enter into this Agreement and to perform its obligations
hereunder and consummate the transactions contemplated hereby. The execution,
delivery and performance by USL of this Agreement and the consummation of the
transactions contemplated hereby have been duly authorized by all necessary
action on the part of USL. No action or approval of the equity owners of USL is
necessary to authorize USL's execution or delivery of, or the performance of its
obligations under, this Agreement. This Agreement has been duly executed and
delivered by USL and is a valid and binding obligation of USL, enforceable in
accordance with its terms.

         8.2 No Conflict. The execution and delivery by USL of this Agreement
does not, and exercise by USL of its rights hereunder and the consummation of
the transactions contemplated hereby will not (a) require any consent, approval,
order or authorization of or other action by any governmental entity on the part
of or with respect to USL or any of its Affiliates; (b) require on the part of
USL or any of its Affiliates any consent by or approval of or notice to any
other Person; or (c) result in a violation of any law, rule, regulation, order,
judgment or decree applicable to USL or any of its Affiliates, except in any
case covered by (a), (b) or (c) where failure to obtain such consent or such
violation would not, either individually or in the aggregate, have a material
adverse effect on the transactions contemplated hereby.

         8.3 Services and Equipment. USL possesses the business, professional
and technical expertise to handle, treat and dispose of NOW and possesses the
equipment, plant and employee resources required to perform this Agreement. USL
shall use its commercially reasonable efforts to turn all barges delivering
materials to the Landfarms in a timely manner consistent with the number of NESI
and third-party generator barges on site at such moment and with its general
practice of giving priority to third-party generators' barges. The equipment
shall, at all times relevant to the performance of services hereunder, be
maintained in good and safe condition and fit for use.



<PAGE>   13

         8.4 Licenses and Permits. As of the Effective Date, USL shall be duly
licensed, permitted and authorized pursuant to all applicable federal, state and
local laws to handle, treat and dispose of NOW, and the Landfarms will have been
issued all licenses, permits and authorizations required by all applicable
federal, state and local laws. At any time during the term of this Agreement,
upon NESI's reasonable request, USL shall provide to NESI, at NESI's expense, a
complete copy of the current permits applicable to the operation of the
Landfarms. During the term of this Agreement, USL shall use its best efforts to
keep all such licenses, permits and authorizations in effect and shall promptly
notify NESI if any such license, permit or authorization is to expire and not be
renewed or becomes the subject of any administrative or judicial action seeking
revocation or suspension.

         8.5 Workers' Compensation. USL shall comply in all material respects
with all applicable workers' compensation laws during the term of this
Agreement. In the event any work is performed by USL's agent or subcontractor,
USL shall obtain certification from such agent or subcontractor that it too is
in compliance in all material respects with such laws or does not fall within
the scope of such laws.

                                   ARTICLE IX
                                    INSURANCE

         9.1 Insurance Coverage. USL and NESI, each at its own expense, shall
procure and maintain in full force and effect during the term of this Agreement
the following kinds of insurance with limits of coverage equal to or exceeding
those limits specified therefor:

                  9.1.1 Workers' Compensation; Employer's Liability. Workers'
Compensation Insurance shall be obtained in accordance with the provisions of
the applicable Workers' Compensation Law or similar laws of a state having
jurisdiction over any employee. Employer's Liability Insurance shall be obtained
with a minimum limit of liability of $1,000,000. To the extent exposures fall,
or may fall, within federal jurisdictions, including the U.S. Longshore and
Harbor Workers' Compensation Act, the Defense Bases Act and the Federal
Employers Liability Act, extensions of coverage shall be obtained in accordance
with the requirements of such laws. Should operations occur where maritime
liability law, the Jones Act, or General Admiralty Law apply, applicable
coverages shall be required at limits of not less than $1,000,000.

                  9.1.2 General Liability. Comprehensive or Commercial General
Liability Insurance, including Products/Completed Operations and Contractual
Liability, which shall cover the indemnity provisions contained in this
Agreement, shall be obtained with a combined single limit of not less than
$1,000,000 per occurrence for bodily injury and property damage.

                  9.1.3 Automobile Liability. Business or Commercial Automobile
Liability Insurance covering all owned, nonowned, and hired vehicles, shall be
obtained with a combined single limit of $ 1,000,000 per occurrence or accident.

                  9.1.4 Umbrella Liability. Umbrella Liability Insurance over
the foregoing coverages shall be obtained as applicable at limits of $10,000,000
per occurrence.



<PAGE>   14

         9.2 Coverage Terms. All coverages shall be written through insurers
authorized to transact business in the states of operation and reasonably
satisfactory and acceptable to both parties. Each party shall be added as an
additional insured, and subrogation as to the policies of the other party shall
be waived as applicable. All policies will be endorsed to provide not less than
30 days' written notice of cancellation, termination, nonrenewal or material
change in the policy. Each party will furnish the other party certificates of
insurance evidencing compliance with the requirements of Section 9.1.

         9.3 Site Financial Assurance and Environmental Impairment Liability. To
the extent available on commercially reasonable terms and subject to the other
terms of this Agreement, USL shall (i) maintain policies of environmental
impairment liability insurance covering the ownership and operation of the
Landfarms in substantially such amounts and on such terms as shall be in place
on the Effective Date and (ii) comply with all applicable federal or state
governmental financial assurance requirements imposed in connection with its
operation of the Landfarms.

                                    ARTICLE X
                                 INDEMNIFICATION

         10.1 Indemnification by USL. USL shall defend, indemnify and hold
harmless NESI and its Affiliates and their employees, officers, owners,
directors and agents, from and against any and all liabilities, penalties,
fines, forfeitures, demands, claims, causes of action, suits, judgments and
costs and expenses incidental thereto, including reasonable attorneys' fees,
which any or all of them may hereafter suffer, incur, be responsible for or pay
out as a result of personal injuries, property damage, or contamination of or
adverse effects on the environment, to the extent directly or indirectly caused
by, or arising from or in connection with (i) the negligence, gross negligence
or willful act or omission or willful misconduct of USL or any of its employees,
officers, owners, directors, agents or subcontractors in the performance of this
Agreement; (ii) the violation of any environmental rule, law or regulation by
USL or any of its employees, officers, owners, directors, agents or
subcontractors; (iii) operations of the Landfarms, including, without
limitation, the receipt and disposal of waste delivered to the Landfarms by NESI
and others; or (iv) the breach of, misrepresentation in, untruth in or
inaccuracy in any representation, warranty or covenant of USL set forth in this
Agreement.

         10.2 Indemnification by NESI. NESI shall defend, indemnify and hold
harmless USL and its Affiliates and their employees, officers, owners,
directors, agents and subcontractors, from and against any and all liabilities,
penalties, fines, forfeitures, demands, claims, causes of action, suits,
judgments and costs and expenses incidental thereto, including reasonable
attorneys' fees, which any or all of them may hereafter suffer, incur, be
responsible for or pay out with respect to claims by third parties for personal
injuries, property damage or other loss to the extent directly or indirectly
caused by, or arising from or in connection with (i) the negligence, gross
negligence or willful act or omission of NESI, any of its employees, officers,
owners, directors, agents or subcontractors or any third-party generator acting
at NESI's direction in the performance of this Agreement, (ii) the violation of
any environmental rule, law or regulation by NESI, any of its employees,
officers, owners, directors, agents or subcontractors or any third-party
generator acting at NESI's direction; (iii) material delivered to any of the
Landfarms by NESI or any third-party generator acting at NESI's direction which
is not in accordance with the terms of this



<PAGE>   15

Agreement or otherwise not permitted to be disposed at such Landfarm; or (iv)
the breach of, misrepresentation in, untruth in or inaccuracy in any
representation, warranty or covenant of NESI set forth in this Agreement.

         10.3     Indemnification Procedures.

                  10.3.1 Promptly after receipt by an indemnified party under
this Article X of notice of the commencement of any action or proceeding
evidenced by service of process or other legal pleading, such indemnified party
will, if a claim in respect thereof is to be made against the indemnifying party
hereunder, notify in writing the indemnifying party of the commencement thereof,
but the omission so to notify the indemnifying party (i) will not relieve it
from any liability that it may have to any indemnified party under this Article
X unless and to the extent that the indemnifying party has been prejudiced in
any material respect by such omission and (ii) will not relieve the indemnifying
party from any liability that it may have to any indemnified party other than
under this Article X. If any such action or proceeding shall be brought against
any indemnified party and it shall notify the indemnifying party of the
commencement thereof, the indemnifying party shall be entitled to participate
therein and, to the extent that it shall wish, to assume the defense thereof
with counsel reasonably satisfactory to such indemnified party (who shall not,
except with the consent of the indemnified party, be counsel to the indemnifying
party), and, after notice from the indemnifying party to such indemnified party
of its election so to assume the defense thereof, the indemnifying party shall
not be liable to such indemnified party under this Article X for any legal or
other expenses subsequently incurred by such indemnified party in connection
with the defense thereof unless the named parties to such action or proceeding
(including any impleaded parties) shall include both an indemnifying party and
an indemnified party and the indemnified party shall have been advised by
counsel that there may be one or more defenses available to such indemnified
party that are different from or additional to those available to the
indemnifying party (in which case, if the indemnified party notifies the
indemnifying party that it wishes to employ separate counsel at the expense of
the indemnifying party (who shall promptly pay all such expenses as incurred),
the indemnifying party shall not have the right to assume the defense of such
action or proceeding on behalf of such indemnified party).

                  10.3.2 If an indemnifying party, within a reasonable period of
time after notice by the indemnified party of the commencement of any action or
proceeding with respect to which the indemnified party is to make a claim
hereunder, fails to assume the defense thereof, the indemnified party shall have
the right (upon further notice to the indemnifying party) to undertake the
defense, compromise or settlement of such action or proceeding for the account
of the indemnifying party, subject to the right of the indemnifying party to
assume the defense of such action or proceeding at any time prior to settlement,
compromise or final determination thereof. The cost and expense of any such
defense and any judgment in any such action or proceeding shall be borne by the
indemnifying party, and, if paid by the indemnified party, shall be reimbursed
by the indemnifying party within thirty days after receipt of invoice therefor.

                  10.3.3 Except as otherwise provided in Section 10.3.2, an
indemnifying party shall not be liable for any settlement of any litigation or
proceeding effected without its written consent. An indemnifying party shall
not, without the indemnified party's written consent, settle or compromise any
action or proceeding or consent to entry of any judgment that would impose an
injunction or other equitable relief upon the indemnified party or that does not
include as an 



<PAGE>   16

unconditional term thereof the release by the claimant or the plaintiff of such
indemnified party from all liability in respect of such action or proceeding.

                                   ARTICLE XI
                               DISPUTE RESOLUTION

         11.1 Negotiation of Disputes. In the event of any dispute or
disagreement arising out of or relating to the implementation and performance of
this Agreement, the parties agree to attempt to resolve such dispute in good
faith. Should a resolution of such dispute not be obtained within 15 days after
the origination of the dispute, either party may in accordance with the
provisions of this Article XI file suit. Any suit filed by any party that
relates to this Agreement must be filed in Texas state court in Harris County,
Texas.

         11.2 Continuation of Performance. In the event of a dispute arising
under this Agreement, the parties shall continue performance of their respective
obligations hereunder.

         11.3 Effect of Breach. Breach of this Agreement by NESI shall
automatically terminate the Noncompetition Agreement of September 16, 1998.

                                   ARTICLE XII
                            SUSPENSION OF PERFORMANCE

         12.1 Suspension of Performance by USL. USL shall have the right to
suspend operations under this Agreement at the Bateman Island Landfarm for any
reason. Upon such suspension, USL shall give NESI written notice of the basis
for, and an estimate of, the length of the suspension.

                  12.1.1 If USL notifies NESI that it will temporarily suspend
operations at the Bateman Island Landfarm due to litigation, court order or
directive of any governmental body having jurisdiction over the operation of the
Landfarm, or substantial changes to laws or regulations, then NESI shall
continue to make all Payments in Full and on Time as this Agreement requires;
provided, however, that USL shall make available the Bourg and/or Mermentau
Landfarms to accept, in a timely fashion, delivery of that portion of the Annual
Volume that NESI would otherwise deliver to the Bateman Island Landfarm under
Section 3.1.l.a. If USL fails to make available either the Bourg Landfarm or the
Mermentau Landfarm to accept delivery, in a timely fashion, of the NOW that NESI
desires to deliver, up to the Annual Volume (prorated for the period involved),
then NESI shall be excused from payments due each month such failure continues.
Upon the resumption of operations at the Bateman Island Landfarm, NESI may
exercise its option to deliver NOW in accordance with Section 3.1.

                  12.1.2 If USL notifies NESI that it will temporarily suspend
operations at the Bateman Island Landfarm due to, caused by or resulting from
fire, lightning, explosion, windstorm, hail, smoke, aircraft or vehicles, riot
or civil commotion, sinkhole collapse, volcanic action, falling objects, weight
of snow, ice or sleet, water damage, vandalism, and malicious mischief, flood,
and/or earthquake, including order of civil authority when such order is given
as a direct result of any other cause named in this sentence, then NESI shall be
excused from payments due each month that operations are suspended. Upon the
resumption of operations at the



<PAGE>   17

Bateman Island Landfarm, NESI shall resume payments and may exercise its option
to deliver NOW in accordance with Section 3.1.

                  12.1.3 If USL notifies NESI that it will temporarily suspend
operations at the Bateman Island Landfarm voluntarily for any reason other than
under Section 12.1.1 or 12.1.2 above, NESI is excused from payments due each
month that operations are suspended. Upon the resumption of operations at the
Bateman Island Landfarm, NESI shall resume payments and may exercise its option
to deliver NOW in accordance with Section 3.1.

                  12.1.4 If operations are temporarily suspended at the Bourg,
Bateman Island and Mermentau Landfarms at once or in reasonably close
succession, then NESI is excused from payments due each month that operations
are suspended. Upon the resumption of operations at any Landfarm, and provided
USL makes any Landfarrn available to accept delivery in a timely fashion, of the
NOW that NESI desires to deliver, up to the Annual Volume (prorated for the
period involved), then NESI shall resume payments and may exercise its option to
deliver NOW in accordance with Section 3.1.

                  12.1.5 Whenever, in accordance with the foregoing provisions
of this Section 12.1, NESI is excused from making payments of a portion of the
additional payment due pursuant to this Agreement for any month or months, such
excuse shall be a permanent excuse, and the total additional payments for the
Contract Year or Contract Years in which such excuse occurs shall be reduced
accordingly.

         12.2 Suspension of Performance by NESI. NESI has no right to suspend
its performance except as specifically provided elsewhere in this Agreement and
any other suspension or attempt to suspend its obligations shall constitute
breach of this Agreement. Disapproval, instruction or communication by a
customer of NESI, including any request by any NESI customer as to where its
waste should be delivered, in a manner contrary to the terms of this Agreement
shall not constitute force majeure nor provide a basis for suspension of
performance.

                                  ARTICLE XIII
                                  MISCELLANEOUS

         13.1 Status of the Parties. Each party hereto is and shall perform this
Agreement as an independent contractor, and as such, shall have and maintain
complete control over all of its employees, agents, and operations. Except as
expressly otherwise provided in this Agreement, neither party nor anyone
employed by it shall be, represent, act, purport to act or be deemed to be the
agent, representative, employee or servant of the other party.

         13.2 No Set-Off Rights. The parties hereby agree that neither party
shall have any right to set-off or apply against any sums due under this
Agreement any sums due or amounts otherwise owing pursuant to any other
provision of this Agreement or any other agreement or arrangement between the
parties.

         13.3 Subrogation; Assignment of Rights. In the event NESI delivers and
USL accepts a delivery of materials (the "Nonconforming Materials") containing
hazardous or dangerous substances in violation of this Agreement and in
violation of NESI's agreement with the third-party



<PAGE>   18

generator producing such materials, NESI agrees that, upon the request of USL,
USL shall become fully subrogated to the rights of NESI against such generator
related to the Nonconforming Materials, and NESI shall (i) assign or take such
further action as is necessary or desirable to transfer to USL any and all
rights of action of NESI against such generator relating to such Nonconforming
Materials arising at law under NESI's agreement with such generator or in equity
and (ii) use its good faith best efforts to assist in the prosecution of any
claim brought by USL against such third party generator relating to the
Nonconforming Materials.

         13.4     Binding Effect; Assignment. This Agreement shall be binding
upon and inure to the benefit of the parties hereto and their respective
successors and assigns. USL and NESI may assign their rights, obligations and
duties under this Agreement with the written consent of the other parties to the
Agreement, which consent shall not be unreasonably withheld; provided that the
assigning party shall remain primarily liable for all obligations and duties
arising hereunder. Without limiting the generality of the foregoing, if USL
sells the Landfarms and/or related business, the purchaser shall assume USL's
obligations under this Agreement, and NESI shall retain its obligations under
this Agreement.

         13.5     Notices.

                  13.5.1 General. Except under Section 3.1.1, notices and other
communications provided for in this Agreement shall be in writing and shall be
deemed to have been validly given (a) three calendar days after deposit in the
United States mails, registered or certified mail with proper postage prepaid
and return receipt requested; (b) upon transmission thereof and receipt of the
appropriate confirmation if sent via telecopier or telefax; (c) the business day
after the same shall have been deposited with a reputable overnight courier,
shipping prepaid; and (d) if delivered in person, upon delivery, in each case
addressed as follows:

If to NESI or Newpark:                   With a copy to:

   c/o Newpark Resources, Inc.              Ervin, Cohen & Jessup
   3850 North Causeway, Suite 1770          9401 Wilshire Boulevard
   Metairie, LA 70002                       Beverly Hills, CA 90212
   Attention: James D. Cole, President      Attention:  Bertram K. Massing, Esq.
   Facsimile No.: (504) 833-9506            Facsimile No.: (310) 859-2325

If to USL:                               With a copy to:

   U.S. Liquids, Inc.                       Baker & Botts, L.L.P.
   411 N. Sam Houston Parkway East          One Shell Plaza
   Houston, TX 77060                        910 Louisiana
   Attention: W. Greg Orr, President        Houston, TX  77002-4995
   Facsimile No.: (281) 272-4545            Attention: Philip J. John, Esq.
                                            Facsimile No.: (713)229-1522

or such other address as any party shall specify by written notice so given.

<PAGE>   19

                           Other Notices. Notices provided for in Section 3. 1.1
shall be made in writing by telefax or mailed to USL as follows:

                           U.S. Liquids, Inc.
                           Division Manager
                           P.O. Box 1467
                           Jennings, LA 70546
                           Attention: Jerry Brazell
                           Facsimile No.: (318) 824-3147

         13.6 Opportunity to Cure. In the event that NESI (i) fails to pay USL
any amount required under this Agreement on or before the date such payment is
due and such payment is not excused by Section 12.1 and/or (ii) otherwise fails
to perform under this Agreement, USL shall give notice to NESI of its failure to
perform in accordance with Section 13.5. The notice shall include a description
of the manner in which NESI failed to perform under this Agreement and shall
include the date on which performance was due. NESI shall have fifteen (15)
calendar days from the date notice is deemed validly given to correct or cure
its failure to perform under this Agreement. If NESI fails to do so, then such
failure shall constitute a breach of this Agreement. If NESI receives from USL
notice that NESI has failed to pay USL any amount required, due and not
otherwise excused under this Agreement and NESI fails to correct or cure such
failure within 15 days from the date such notice is given, then such failure
shall be deemed failure to make Payment in Full and on Time and shall constitute
a breach of this Agreement. Failure by USL to act in accordance with this
Section shall not itself constitute a breach of this Agreement nor shall such
failure cause USL to waive or relinquish any right or option provided by any
Section in this Agreement; provided, however, that NESI shall not be deemed to
have breached this Agreement unless and until notice of such alleged breach
shall have been given in accordance with this section, and NESI shall have
failed to cure or correct its failure to perform as specified in such notice.

         13.7 Non-Waiver. The failure of any party to enforce its rights under
any provision of this Agreement shall not be construed to be a waiver of such
provision. No waiver of any breach of this Agreement shall be held to be a
waiver of any other breach.

         13.8 Effect on NOW Payment and Other Agreements. The NOW Payment
Agreement is superseded in its entirety by this Agreement and shall be of no
further force or effect. Each of the Other Agreements is and shall remain in
full force and effect, except that all references to the NOW Payment Agreement
in the Other Agreements shall be deemed to refer solely to this Agreement unless
the context requires otherwise.

         13.9 Entire Agreement; Amendment. This Agreement and the Other
Agreements constitute the entire agreement between the parties concerning the
subject matter hereof and supersede any and all other communications,
representations, proposals, understandings or agreements, either written or
oral, between the parties hereto with respect to such subject matter.
Concurrently with the execution and delivery of this Agreement, the parties are
also executing and delivering an agreement (the "Option") under which NESI and
Newpark are granted the option to extend certain provisions of this Agreement
for an additional two years. This Agreement may not be modified or amended, in
whole or in part, except by a writing signed by both parties hereto.


<PAGE>   20

         13.10 Severability. If any provision of this Agreement is declared
invalid or unenforceable, then such portion shall be deemed to be severable from
this Agreement and shall not affect the remainder hereof.

         13.11 Headings. The Article and Section headings contained herein are
for reference purposes only and shall not in any way affect the meaning and
interpretation of this Agreement.

         13.12 Counterparts. This Agreement may be executed in any number of
counterparts, each of which shall be deemed an original and all of which shall
constitute one instrument.

         13.13 Governing Law. THIS AGREEMENT SHALL BE GOVERNED BY AND CONSTRUED
IN ACCORDANCE WITH THE LAWS OF THE STATE OF TEXAS.


                      [SIGNATURES BEGIN ON FOLLOWING PAGE]


<PAGE>   21



         ON THIS DATE, the Parties have executed multiple originals of this
Payment Agreement.


                                        NEWPARK ENVIRONMENTAL SERVICES, INC.

Dated: December 31, 1998                By:
                                        Name:
                                        Title:


                                        NEWPARK RESOURCES, INC.

Dated: December 31, 1998                By:
                                        Name:
                                        Title:


                                        U.S. LIQUIDS, INC.

Dated: December 31, 1998                By:
                                        Name:
                                        Title:





<PAGE>   1
                                                                   EXHIBIT 10.18

                                OPTION AGREEMENT

         THIS OPTION AGREEMENT (the "Option Agreement") is made and entered into
this 31st day of December, 1998, by and among U.S. Liquids, Inc. ("U.S. Liquids"
or "USL"), a Delaware corporation, Newpark Resources, Inc., a Delaware
corporation ("Newpark"), and Newpark Environmental Services, Inc. ("NESI"), a
Delaware corporation and wholly owned subsidiary of Newpark, with reference to
the following facts:

         A. Concurrently with the execution and delivery of this Option
Agreement, the parties have executed and delivered an agreement captioned
"Payment Agreement" (the "Payment Agreement") which modifies certain provisions
of the NOW Payment Agreement dated September 16, 1998 (as previously amended
effective September 22, 1998) between USL and NESI.

         B. Under the Payment Agreement, Newpark and NESI retained the right,
but not the obligation, to deliver certain limited quantities of NOW to USL for
Disposal for a term ending June 30, 2001. NESI desires to obtain the option (the
"Option") to extend by up to two additional one-year periods (one period at a
time) the term (the "Term") for which it has the right to deliver NOW to USL for
Disposal.

         NOW THEREFORE, in consideration of the above premises and the mutual
covenants and promises contained herein, and for other good and valuable
consideration, the receipt and sufficiency of which are hereby acknowledged, the
parties hereby agree as follows:

         1.       DEFINITIONS

                  The following terms shall have the following meanings in this
Option Agreement (unless indicated otherwise, all Article and Section references
in this Option Agreement are to Articles and Sections in this Option Agreement):

                  Adjustment Date: June 30, 2001 (the "First Adjustment Date")
or June 30, 2002 (the "Second Adjustment Date"), as applicable.

                  Affiliate: A Person that directly, or indirectly through one
or more intermediaries, controls, is controlled by or is under common control
with the Person specified. For purposes of this definition, the term "control"
(including the terms "controlling," "controlled by" and "under common control
with") of a Person means the possession, direct or indirect, of the power to (i)
vote 50% or more of the voting interests in such Person or (ii) direct or cause
the direction of the management and policies of such Person, whether by contract
or otherwise.

                  Annual Volume: For each Option Year separately, the maximum
volume of NOW permitted to be delivered by or on behalf of NESI at no cost and
accepted for Disposal by USL, which volume shall be 1,400,000 barrels of NOW for
each Option Year.

                  Base Rate:  146.4.

                  Collection: The collection, transfer or transportation of NOW.


<PAGE>   2

                  Consumer Price Index: The number reflecting the measure of the
average change in prices over time of certain goods and services purchased by
all urban consumers in the Houston Area, as compiled and reported every
even-numbered month by the United States Department of Labor, Bureau of Labor
Statistics. On any Adjustment Date, the Consumer Price Index shall be the number
last reported and in effect as of that date. If the Consumer Price Index as
defined becomes unavailable, the parties shall use the number last reported as a
measure of the average change in prices of goods and services purchased by all
urban consumers in (i) the State of Texas or, in the event that number is
unavailable, (ii) the United States.

                  Covered Region: The States of Louisiana, Texas, Mississippi
and Alabama, and the Gulf of Mexico.

                  Disposal:  The treatment or disposal of NOW.

                  Excluded NOW: NOW generated and collected on land and
delivered to a Landfarm from the site where it was generated entirely by on-land
transportation.

                  Landfarms: The NOW disposal facilities owned and operated by
USL designated as Elm Grove, LA (DNR Permit #OWD 89-1) (the "Elm Grove
Landfarm"); Bourg, LA (DNR Permit #90-10 OWD) (the "Bourg Landfarm"); Bateman
Island, LA (DNR Permit #91-10 OWD) (the "Bateman Island Landfarm"); and
Mermentau, LA (DNR Permit #SWD 83-6) (the "Mermentau Landfarm").

                  NOW: Nonhazardous oilfield waste (including Washwater)
associated with the exploration and production of oil, gas and geothermal energy
that contains less than 30 picocuries per gram of Radium 226 or 228. Without
limiting the generality of the foregoing, for waste disposed of in Louisiana,
the term NOW shall include all wastes containing less than 30 picocuries per
gram of Radium 226 or 228 classified as NOW under Louisiana Statewide Order
29-B, as currently in effect, and all waste that is classified as "E&P Waste" by
the Louisiana Department of Natural Resources.

                  Option: As defined in Section B above, the right to extend the
Term, as provided in this Option Agreement.

                  Option Payment: The amount that NESI must pay to USL for an
Option Year if it exercises the Option as to such Option Year, which, except as
provided in Section 12.1, shall be no less than $8 Million, adjusted as provided
in Section 2.2 of this Option Agreement.

                  Option Year: The twelve-month period commencing July 1, 2001
(the "First Option Year"), and/or the twelve-month period commencing July 1,
2002 (the "Second Option Year").

                  Payment in Full and on Time: Payment or reimbursement made to
USL on or before any date specified for such payment in this Option Agreement
except and unless timely paid in accordance with Section 13.6 of this Option
Agreement.




<PAGE>   3

                  Person: Any individual, corporation, association, partnership,
joint venture, trust, estate or other entity or organization or government or
any agency or political subdivision thereof.

                  Term: As defined in Section B above.

                  Washwater: Fluids generated by the cleaning and/or
decontamination of tanks, barges, vessels, containers or other similar
structures used in the storage and/or transportation of NOW. Washwater may
contain cleaning agents and emulsifiers, etc., in addition to the basic cleaning
agent (water).

                  Zapata Facility: A NOW disposal facility owned and operated by
USL located near Zapata, Texas.

         2.       GRANT AND EXERCISE OF OPTION

                  2.1 Grant of Option. USL hereby grants to NESI the Option,
which may be exercised or not exercised by NESI in its sole discretion. The
Option may be exercised by NESI as to the First Option Year only by giving to
USL written notice of the exercise of the Option on or before December 31, 2000;
if the Option is exercised as to the First Option Year, the Option may be
exercised by NESI as to the Second Option Year only by giving to USL written
notice of the exercise of the Option on or before December 31, 2001.

                  2.2 Payments by NESI. For each Option Year as to which NESI
exercises the Option, NESI shall pay to USL an amount equal to the Option
Payment for such year. On the First Adjustment Date, June 30, 2001, the Option
Payment for the First Option Year shall be adjusted by (i) dividing 100% of the
Consumer Price Index in effect on that date by 100% of the Base Rate; and (ii)
multiplying the result by $8 million except as provided in Section 12.1. In the
event the net change in the Consumer Price Index is negative, the Option Payment
for the First Option Year shall be $8 million, except as provided in Section
12.1. NESI shall pay the Option Payment for the First Option Year in twelve
equal monthly installments due on or before July 2, 2001, August 1, 2001,
September 3,2001, October 1, 2001, November 1, 2001, December 3, 2001, January
2, 2002, February 1, 2002, March 1, 2002, April 1, 2002, May 1, 2002, and June
3, 2002, respectively, except as provided in Section 12.1. On the Second
Adjustment Date, June 30, 2002, the Option Payment for the Second Option Year
shall be adjusted by (i) dividing 100% of the Consumer Price Index in effect on
that date by 100% of the Base Rate; and (ii) multiplying the result by $8
million except as provided in Section 12.1. In the event the net change in the
Consumer Price Index is negative, then the Option Payment for the second Option
Year shall be $8 million except as provided in Section 12.1. NESI shall pay the
Option Payment for the Second Option Year in twelve equal monthly installments
due on or before July 1, 2002, August 1, 2002, September 2, 2002, October 1,
2002, November 1, 2002, December 2, 2002, January 1, 2003, February 3, 2003,
March 3, 2003, April 1, 2003, May 1, 2003, and June 2, 2003, respectively,
except as provided in Section 12.l.

                  2.3 Obligation to Pay. NESI's obligation to make Payment in
Full and on Time in any Option Year as to which NESI has exercised the Option
exists without regard to whether NESI exercises its option to deliver NOW, if
any, to USL in accordance with Section



<PAGE>   4

3.1. Failure to make Payment in Full and on Time in every instance for any
reason whatsoever constitutes a breach of this Option Agreement and shall not
entitle NESI to any offsets, carryovers, or counterclaims of any kind.

                  2.4 Reimbursement for Revenues. For each Option Year as to
which NESI exercises the Option, NESI shall recover 100% of any revenues
received by USL and its Affiliates during each calendar quarter of that Option
Year from the "Business," as that term is defined in the Noncompetition
Agreement dated September 16, 1998, between USL and Newpark. USL shall reimburse
NESI in the proper amount within 30 days of the end of each calendar quarter.

         3.       DISPOSAL VOLUME

                  3.1      NOW Delivery.

                           3.1.1    Delivery Option.

                  a. NESI may, at its option, deliver to USL for Disposal at the
                  Bateman Island Landfarm a maximum amount of NOW equal to the
                  Annual Volume for such Contract Year at no cost without prior
                  notice or approval. Subject to the terms and conditions and
                  the limitations set forth in this Agreement, USL shall accept
                  for Disposal at the Bateman Island Landfarm all NOW delivered
                  by or on behalf of NESI, provided, however, that in no event
                  shall USL be obligated to accept from NESI for Disposal at any
                  Landfarm more than the Annual Volume during any Contract Year.
                  Failure to deliver the full Annual Volume shall not result in
                  any carryforward or increase in the Annual Volume in the
                  succeeding Contract Year.

                  b. NESI shall have the right to deliver a volume no more than
                  10% of the Annual Volume to the Bourg Landfarm at no cost,
                  subject to Section 3.1.l.a, and prior notice by NESI in
                  accordance with Section 13.5.2, of 48 hours if such delivery
                  shall arrive by marine transportation; or

                  c. NESI shall have the right to deliver a volume no more than
                  10% of the Annual Volume to the Mermentau Landfarm at no cost,
                  subject to Section 3.1.1.a and prior written approval by USL,
                  which approval will not be unreasonably withheld.

                           3.1.2 Obligation to Pay. If NESI has exercised the
Option as to an Option Year, NESI is obligated to make the Option Payment
regardless of the volume of NOW, if any, delivered to or accepted by USL in
accordance with this Section 3.1, except as provided in Section 12.1. Failure by
NESI to exercise its option to deliver NOW to USL for Disposal shall not alter,
lessen, decrease, alleviate, or relieve NESI of its obligation to pay USL in
accordance with Article 2. NESI shall make all payments in accordance with
Article 2 without regard to the volume of NOW, if any, offered or delivered to
USL for Disposal.

                  3.2 Variance. The parties agree to cooperate to minimize
monthly and quarterly variances in NOW, if any, delivered for Disposal at the
Landfarms, in order to avoid disruption of or problems in USL's operations.



<PAGE>   5

                  3.3 Radium Concentration. Notwithstanding anything contained
in this Option Agreement to the contrary, USL shall not be obligated to accept
NOW from NESI at any Landfarm where such NOW (i) when combined with other NOW in
an individual treatment cell, would cause the weighted average concentration of
Radium 226 or 228 to exceed 5 pCi/gm, excluding background, or (ii) would
require the loading of two or more treatment cells simultaneously to prevent the
weighted average concentration of Radium 226 or 228 from exceeding 5 pCi/gm,
excluding background. In the event NESI delivers NOW contravening the foregoing
sentence, USL shall have the right, but not the obligation, to reject such NOW
in accordance with Section 6.6.

         4.       SERVICES, LEVIES AND INSPECTION

                  4.1 Additional Services; Disposal of Injectable Saltwater.
Pursuant to this Option Agreement, USL will perform standard off-loading and
customary handling services associated with disposal of NOW up to, and
including, the Annual Volume at no additional charge. USL will perform
additional services upon request of NESI at the market rates of USL for such
services, or at such other rates as the parties may mutually agree upon. All
charges for such additional services shall be in addition to and independent of
the Option Payment. USL will accept injectable saltwater at the Landfarms for
disposal upon request of NESI at the market rates of USL for disposal of
injectable saltwater, or at such other rates as the parties may mutually agree
upon. All charges for disposal of injectable saltwater shall be in addition to
and independent of the Option Payment.

                  4.2 Disposal of Washwater. NESI shall pay USL to dispose of
Washwater at the rate of $1.50 per barrel of Washwater. On each Adjustment Date,
the rate shall be adjusted by (i) adding to the Base Rate 70% of the positive
amount, if any, determined by subtracting the Base Rate from the Consumer Price
Index as of that Adjustment Date, (ii) dividing said sum by the Base Rate, and
(iii) multiplying the result by $1.50. If the net change in the Consumer Price
Index is negative, then the rate for disposal of Washwater shall be $1.50 per
barrel. The disposal of Washwater shall be for the benefit of NESI, and USL
shall provide NESI with billing information specified by NESI to enable NESI to
bill the customer or customers for whose account any related cleaning services
were performed.


                  4.3 Invoice for Additional Services: USL shall invoice NESI on
a monthly basis for fees or expenses incurred from any services performed
pursuant to Section 4.1 or 4.2 to be paid no later than 30 days from receipt of
the invoice. Failure to pay USL in accordance with the terms of the invoice
shall constitute a breach of this Option Agreement.

                  4.4      Extraordinary Levies.

                           4.4.1 Taxes. Notwithstanding anything to the contrary
contained herein, if during the term of this Option Agreement there is levied
upon USL or any of its Affiliates or upon the operations of USL any tax, fee,
assessment, or other charge (other than income taxes applicable generally) by
any governmental authority, which tax, assessment or charge increases USL's
costs to operate any Landfarm, USL shall notify NESI of the cause and the per
barrel 




<PAGE>   6

amount of the cost increase. If NESI chooses to deliver NOW to USL following the
effectiveness of the tax, fee, assessment or other charge, USL will invoice NESI
for and NESI will be obligated to pay NESI's share of the cost increase for so
long as such tax, fee, assessment or other charge remains in effect as follows:
(I) with respect to any cost increase resulting from any tax, fee, assessment or
other charge levied by a governmental authority on a per barrel basis, an amount
determined by multiplying such per barrel charge (but not more than the increase
in cost resulting therefrom) by the number of barrels of NOW delivered by NESI
to USL; and (ii) with respect to any tax, fee, assessment or other charge levied
by a governmental authority on any basis other than per barrel, NESI's
proportionate share of the cost increase resulting from such tax, fee,
assessment or charge. NESI's proportionate share shall be calculated as follows:
(a) if such tax, fee, assessment or other charge increases the cost to operate
the Bateman Island Landfarm, the NESI's proportionate share shall be calculated
by (I) dividing the number of barrels of NOW delivered to USL by NESI by the
Annual Volume and (ii) multiplying the result by the amount of the cost increase
resulting from the tax, fee, assessment, or other charge; (b) if such tax, fee,
assessment or other charge increases the cost to operate the Bourg and/or
Mermentau Landfarm, then NESI's proportionate share shall be calculated by (I)
dividing the number of barrels of NOW delivered to USL by NESI to that Landfarm
by the total number of barrels delivered to that Landfarm by all Persons and
(ii) multiplying the result by the amount of the cost increase at that Landfarm
resulting from the tax, fee, assessment, or other charge. Such payment or
reimbursement shall not alter the Annual Volume nor alter the Option Payment.

                           4.4.2 Landfarm Environmental Regulations.
Notwithstanding anything to the contrary contained herein, if during the term of
this Option Agreement there is a substantial change in regulatory requirements
related to the waste disposal business having general applicability to the
handling, treatment or disposal of NOW, which change increases in a material
manner USL's costs to operate any Landfarm, (i) USL shall notify NESI of the
cause and the per barrel amount of the cost increase and, to the extent that
NESI chooses to deliver NOW to USL, (ii) USL will invoice NESI for NESI's
proportionate share of the cost increase and NESI will be obligated to pay such
amount so long as such cost increase remains in effect. NESI's proportionate
share shall be calculated as follows: (a) if such change in regulatory
requirements increases costs to operate the Bateman Island Landfarm, then NESI's
proportionate share shall be calculated by (i) dividing the number of barrels of
NOW delivered to USL by NESI by the Annual Volume and (ii) multiplying the
result by the amount of the cost increase; (b) if such change in regulatory
requirements increases costs to operate the Bourg and/or Mermentau Landfarm,
then NESI's proportionate share shall be calculated by (i) dividing the number
of barrels of NOW delivered to USL by NESI to that Landfarm by the total number
of barrels delivered to that Landfarm by all Persons and (ii) multiplying the
result by the amount of the cost increase at that Landfarm. Failure to pay USL
in accordance with the terms of the invoice shall constitute a breach of this
Option Agreement.

                           4.4.3 Right of Inspection. In the event USL notifies
NESI of a cost increase pursuant to this Section 4.4, NESI shall have the right
to conduct a reasonable review of the calculations, working papers and the books
and records related to the determination of such fee increase. All costs of such
review shall be borne exclusively by NESI.




<PAGE>   7

         5.       GUARANTY BY NEWPARK

                  5.1 Performance of Option Agreement. Newpark hereby covenants
and agrees that it shall cause NESI to fully perform all of its obligations
under this Option Agreement in a timely manner. Newpark further covenants and
agrees that it shall take all action, including, without limitation, supplying
information necessary for the determination of quantities of NOW that may be
delivered pursuant to this Option Agreement, or shall refrain from taking any
action, as is necessary or appropriate, to permit NESI to fully perform all of
its obligations under this Option Agreement in a timely manner.

                  5.2 Unconditional Guarantee. Newpark hereby unconditionally
and irrevocably guarantees the performance in full of all obligations of NESI
under this Option Agreement, with the same force and effect and to the same
extent as if Newpark had the same rights and obligations hereunder as NESI.

                  5.3 No Set-Off; Guaranty of Performance or Payment Upon
Demand. Newpark shall perform any obligations or pay any amounts due in respect
of the obligations of NESI hereunder promptly upon demand by USL or its
Affiliates, without any set-off, defense or deduction for any claims or
counterclaims of any kind, except for any such setoffs, defenses, or deductions
that NESI could assert hereunder.

                  5.4 Waiver of Diligence, Etc. Newpark hereby waives diligence,
presentment, demand, protest and notice of any kind with respect to this
Guarantee, as well as any requirement that USL or its affiliates exhaust any
rights or take any action against NESI.

                  5.5 Waiver of Suretyship Defenses. To the extent permitted by
applicable law, Newpark hereby waives any and all legal and equitable defenses
that arise by reason of Newpark's status as a surety for NESI, which defenses
would not be available to Newpark if it had the same rights and obligations
hereunder as NESI.

                  5.6 Status. This Section 5 shall remain in full force and
effect with respect to each Option Year for which the Option is exercised and
shall terminate thereafter when and to the extent that this Option Agreement is
terminated.

         6.       OPERATING PROCEDURES

                  6.1 Compliance with Operating Procedures. NESI and its
Affiliates shall comply in all material respects with and abide by, and shall
require their employees, servants, agents, representatives, contractors,
subcontractors, haulers and transporters to comply in all material respects with
and abide by, all applicable federal, state and local laws, ordinances, permits,
regulations, directives, codes, standards and requirements relating to the
subject matter of this Option Agreement or the performance of services
hereunder, as well as all of USL's rules, regulations, procedures and
guidelines, written or oral, as the same may be reasonably adopted and modified
from time to time, including, without limitation, all safety and/or security
regulations, practices and procedures, and all procedures reasonably adopted by
USL in compliance with its permits or utilized by USL in the inspection,
sampling and testing of material delivered to any Landfarm for disposal.


<PAGE>   8

                  6.2 Inspection and Testing by NESI; Notification. NESI agrees
that it shall inspect and test all materials accepted, acquired, taken
possession of, procured, directed, controlled or otherwise received by it from
third party generators or other parties for disposal (with the exception of any
NOW produced by third-party generators which NESI or its Affiliates treat and
dispose of on the site at which the NOW was generated) to the extent required by
applicable federal, state and local laws, ordinances, permits, regulations,
directives, codes, standards and requirements. NESI shall promptly notify USL if
it becomes aware of any unusual or special characteristics of any materials
being delivered to any Landfarm which cause such materials to require special
treatment, handling or care. Upon request by USL, NESI shall provide copies of
all inspection and test results relating to material to be disposed of at any
Landfarm under the terms of this Option Agreement to USL upon delivery.

                  6.3 Shipment and Delivery of NOW. NESI, its Affiliates and/or
its contractors and subcontractors shall be responsible for proper
containerization, preparation and labeling for shipment, shipment,
transportation and delivery to any Landfarm, and shall comply fully with all
applicable federal, state and local laws, ordinances, permits, regulations,
directives, codes, standards and requirements in making such delivery to any
Landfarm. USL and its Affiliates undertake no responsibility whatsoever for the
preparation, handling or transportation of any material prior to acceptance of
delivery as hereinafter provided.

                  6.4      Inspections.

                           6.4.1 Barges. Upon arrival of any barge transporting
material to a Landfarm at the direction of NESI or any of its Affiliates, USL
shall have the right to have an independent third party inspector selected by
USL undertake an inspection of the barge transporting material to the Landfarm
for the purpose of determining (a) the volume of materials delivered and (b) the
condition of the barge on arrival at the Landfarm. The costs of such inspector
shall be split evenly between NESI and USL, and NESI's portion of such expense
shall be included on the monthly invoices prepared by USL in accordance with
Section 4.3. Before any materials are off-loaded from the barge or any
inspection or testing is undertaken by USL, the independent inspector will
provide the authorized representatives of NESI and USL with an inspector's
report indicating the time and date, the barge identification number and volume
of waste materials in the barge. The authorized representatives of the parties
will indicate their acceptance of the inspector's report by signing the report.
In the event either authorized representative disagrees with the volume
determination, either authorized representative may request that an additional
independent third-party inspector prepare an inspector's report, the cost of
which shall be borne by the party requesting the same. If the parties are unable
to agree on the actual volume of waste after the preparation of the second
inspector's report, the two independent inspectors shall select a third
independent inspector to prepare an inspector's report, the cost of which will
be borne half by NESI and half by USL. The final volume determination shall be
that volume agreed upon by the majority of the independent inspectors that have
inspected the barge. If the barge appears to be damaged in any significant
respect, the inspector shall summarize the apparent damage and take photographs
as appropriate to evidence the scope of the damage. The authorized
representative of NESI shall approve such damage summary by executing the same
prior to the time any material is off-loaded from the barge. With regard to
barges owned and operated by NESI, USL agrees that it shall not exercise its
right to implement the procedures set forth in this Section 6.4.1 unless the
parties have previously had a dispute or disagreement relating





<PAGE>   9

to the quantity of materials delivered to a Landfarm by NESI or the condition of
a barge owned and operated by NESI and such dispute or disagreement was not
amicably resolved within 30 days.


                           6.4.2 Trucks. Upon arrival of a truck transporting
material to a Landfarm on behalf of NESI or any of its Affiliates, USL personnel
shall undertake an inspection to determine the volume of materials delivered.
Before any materials are off-loaded from the truck or any inspection or testing
is undertaken by USL, USL shall prepare a receipt indicating the time and date
and the volume of materials in the truck. The driver of the truck shall indicate
his or her acceptance of the receipt by signing the receipt. In the event the
driver disagrees with the volume determination, USL shall have the option of (i)
accepting the volume stated by the driver and preparing a receipt evidencing
such volume to be signed by the driver or (ii) rejecting such materials in
accordance with Section 6.6.

                  6.5      Inspection and Testing of Material. After all 
inspections, if any, pursuant to Section 6.4 have been concluded, USL shall
conduct inspections, testing and sampling using such equipment and procedures as
are required by or consistent with its permits. USL may rely exclusively on the
results of its inspection in determining whether materials delivered may be
disposed at the Landfarm in accordance with its permits and this Option
Agreement. NESI authorizes USL to retain samples and all data relating thereto,
including test results, for so long as required by federal, state or local law,
ordinance, permit, regulation, directive, code, standard or requirement and
additionally for so long as USL in its sole discretion shall determine.

                  6.6      Acceptance or Rejection of Material.

                           6.6.1 Acceptance. USL shall only be obligated to
accept waste materials at the Landfarm which are permissible under the permit
requirements of that Landfarm at the time of delivery. For a period of ten days
after the date of delivery, USL shall have the right to reject (or revoke any
prior acceptance) all or any part of a shipment of material delivered by or on
behalf of NESI to the Landfarm if (i) such material is not in accordance with
the terms of this Option Agreement or (ii) USL concludes that such material
exceeds the parameters of the permits applicable to the Landfarm. USL shall
notify NESI of any rejection in writing and shall state the reason therefor. The
expiration of such ten-day period without a rejection or a revocation of a prior
acceptance of material shall constitute "Final Acceptance" of such material.

                           6.6.2 Rejected Material. Rejected material shall
remain at NESI's risk and expense and shall not be deemed to be incorporated
into the Landfarm or come under the possession, custody, control or ownership of
USL. Notwithstanding the foregoing, to the extent required by federal, state or
local law, ordinance, permit, regulation, directive, code, standard or
requirement, or by USL's safety and/or security rules, practices or procedures,
USL may detain any rejected materials, including the vehicle and/or containers
in which such rejected materials arrived, and shall notify regulatory or other
authorities wherever necessary or appropriate to do so.

                           6.6.3 Removal. In the event USL rejects all or any
part of a shipment of material from NESI, after compliance in all material
respects with all regulatory and any other



<PAGE>   10

requirements involving detention of such shipment, upon written request of USL,
NESI, unless otherwise directed by a regulatory agency or other lawful
authority, shall promptly remove or cause to be removed from the Landfarm all of
the rejected material at NESI's risk and expense in a manner consistent with all
applicable federal, state and local laws, ordinances, permits, regulations,
directives, codes, standards and requirements. In the event NESI fails to
complete such removal by the fifth business day after the date of the request by
USL, USL, unless otherwise required by law or regulation, may remove or cause to
be removed from the Landfarm any and all of the rejected material, and may
containerize and transport it or cause it to be containerized and transported to
an authorized storage site or returned to NESI at its nearest location. NESI
hereby authorizes USL in such event to contract for such storage for NESI's
account. For its services, USL shall charge and NESI shall pay USL's cost plus
15%. Any and all material that USL rejects shall remain property and the
responsibility of NESI at NESI's risk and expense.

                  6.7 Third-Party Deliveries. USL may follow the procedures set
forth in this Article VI with respect to any third-party generator's vessels or
vehicles containing materials that are delivered to any Landfarm at the
direction of NESI or its Affiliates. In addition, USL may establish and enforce
other policies and procedures relating to the independent inspection of any such
third-party generator's vessels or vehicles before the material contained in
such vessels or vehicles shall be accepted for disposal.

         7.       COVENANTS, REPRESENTATIONS AND WARRANTIES OF NESI

                  NESI hereby covenants, represents and warrants to USL as
follows:

                  7.1 Authorization and Validity of Agreement. NESI has all
requisite power and authority to enter into this Option Agreement and to perform
its obligations hereunder and consummate the transactions contemplated hereby.
The execution, delivery and performance by NESI of this Option Agreement and the
consummation of the transactions contemplated hereby have been duly authorized
by all necessary action on the part of NESI. No action or approval of the equity
owners of NESI is necessary to authorize NESI's execution or delivery of, or the
performance of its obligations under, this Option Agreement. This Option
Agreement has been duly executed and delivered by NESI and is a valid and
binding obligation of NESI, enforceable in accordance with its terms.

                  7.2 No Conflict. The execution and delivery by NESI of this
Option Agreement does not, and exercise by NESI of its rights hereunder and the
consummation of the transactions contemplated hereby will not, (a) require any
consent, approval, order or authorization of or other action by any governmental
entity on the part of or with respect to NESI; (b) require on the part of NESI
any consent by or approval of or notice to any other Person; or (c) result in a
violation of any law, rule, regulation, order, judgment or decree applicable to
NESI, except in any case covered by (a), (b) or (c) where failure to obtain such
consent or such violation would not, either individually or in the aggregate,
have a material adverse effect on the transactions contemplated hereby.

                  7.3 Licensed Carriers. Any carrier with which NESI contracts
to transport NOW and all of NESI's driver personnel shall at all times relevant
to the performance of services


<PAGE>   11

under this Option Agreement remain properly licensed and otherwise fully
qualified to perform the services required hereunder.

                  7.4 Customer Approval. For each Option Year as to which the
Option has been exercised by NESI, NESI's obligations under this Option
Agreement shall not be affected in any way by the approval, disapproval,
recommendation, instruction, direction or other communication between NESI and
its customers, including any request by any NESI customer as to where its waste
should be delivered. NESI shall remain responsible for payment under this Option
Agreement without reference or regard to NESI's customers.

         8.       COVENANTS, REPRESENTATIONS AND WARRANTIES OF USL

                  USL hereby covenants, represents and warrants to NESI as
follows:

                  8.1 Authorization and Validity of Agreement. USL has all
requisite power and authority to enter into this Option Agreement and to perform
its obligations hereunder and consummate the transactions contemplated hereby.
The execution, delivery and performance by USL of this Option Agreement and the
consummation of the transactions contemplated hereby have been duly authorized
by all necessary action on the part of USL. No action or approval of the equity
owners of USL is necessary to authorize USL's execution or delivery of, or the
performance of its obligations under, this Option Agreement. This Option
Agreement has been duly executed and delivered by USL and is a valid and binding
obligation of USL, enforceable in accordance with its terms.

                  8.2 No Conflict. The execution and delivery by USL of this
Option Agreement does not, and exercise by USL of its rights hereunder and the
consummation of the transactions contemplated hereby will not (a) require any
consent, approval, order or authorization of or other action by any governmental
entity on the part of or with respect to USL or any of its Affiliates; (b)
require on the part of USL or any of its Affiliates any consent by or approval
of or notice to any other Person; or (c) result in a violation of any law, rule,
regulation, order, judgment or decree applicable to USL or any of its
Affiliates, except in any case covered by (a), (b) or (c) where failure to
obtain such consent or such violation would not, either individually or in the
aggregate, have a material adverse effect on the transactions contemplated
hereby.

                  8.3 Services and Equipment. USL possesses the business,
professional and technical expertise to handle, treat and dispose of NOW and
possesses the equipment, plant and employee resources required to perform this
Option Agreement. USL shall use its commercially reasonable efforts to turn all
barges delivering materials to the Landfarms in a timely manner consistent with
the number of NESI and third-party generator barges on site at such moment and
with its general practice of giving priority to third-party generators' barges.
The equipment shall, at all times relevant to the performance of services
hereunder, be maintained in good and safe condition and fit for use.

                  8.4 Licenses and Permits. As of the Effective Date, USL shall
be duly licensed, permitted and authorized pursuant to all applicable federal,
state and local laws to handle, treat and dispose of NOW, and the Landfarms will
have been issued all licenses, permits and authorizations required by all
applicable federal, state and local laws. At any time during the



<PAGE>   12

term of this Option Agreement, upon NESI's reasonable request, USL shall provide
to NESI, at NESI's expense, a complete copy of the current permits applicable to
the operation of the Landfarms. During the term of this Option Agreement, USL
shall use its best efforts to keep all such licenses, permits and authorizations
in effect and shall promptly notify NESI if any such license, permit or
authorization is to expire and not be renewed or becomes the subject of any
administrative or judicial action seeking revocation or suspension.

                  8.5 Workers' Compensation. USL shall comply in all material
respects with all applicable workers' compensation laws during the term of this
Option Agreement. In the event any work is performed by USL's agent or
subcontractor, USL shall obtain certification from such agent or subcontractor
that it too is in compliance in all material respects with such laws or does not
fall within the scope of such laws.

         9.       INSURANCE

                  9.1 Insurance Coverage. USL and NESI, each at its own expense,
shall procure and maintain in full force and effect during the term of this
Option Agreement the following kinds of insurance with limits of coverage equal
to or exceeding those limits specified therefor:

                           9.1.1 Workers' Compensation; Employer's Liability.
Workers' Compensation Insurance shall be obtained in accordance with the
provisions of the applicable Workers' Compensation Law or similar laws of a
state having jurisdiction over any employee. Employer's Liability Insurance
shall be obtained with a minimum limit of liability of $1,000,000. To the extent
exposures fall, or may fall, within federal jurisdictions, including the U.S.
Longshore and Harbor Workers' Compensation Act, the Defense Bases Act and the
Federal Employers Liability Act, extensions of coverage shall be obtained in
accordance with the requirements of such laws. Should operations occur where
maritime liability law, the Jones Act, or General Admiralty Law apply,
applicable coverages shall be required at limits of not less than $1,000,000.

                           9.1.2 General Liability. Comprehensive or Commercial
General Liability Insurance, including Products/Completed Operations and
Contractual Liability, which shall cover the indemnity provisions contained in
this Option Agreement, shall be obtained with a combined single limit of not
less than $1,000,000 per occurrence for bodily injury and property damage.

                           9.1.3 Automobile Liability. Business or Commercial
Automobile Liability Insurance covering all owned, nonowned, and hired vehicles,
shall be obtained with a combined single limit of $ 1,000,000 per occurrence or
accident.

                           9.1.4 Umbrella Liability. Umbrella Liability
Insurance over the foregoing coverages shall be obtained as applicable at limits
of $10,000,000 per occurrence.

                  9.2 Coverage Terms. All coverages shall be written through
insurers authorized to transact business in the states of operation and
reasonably satisfactory and acceptable to both parties. Each party shall be
added as an additional insured, and subrogation as to the policies of the other
party shall be waived as applicable. All policies will be endorsed to provide
not less than 30 days' written notice of cancellation, termination, nonrenewal
or material



<PAGE>   13

change in the policy. Each party will furnish the other party certificates of
insurance evidencing compliance with the requirements of Section 9.1.

                  9.3 Site Financial Assurance and Environmental Impairment
Liability. To the extent available on commercially reasonable terms and subject
to the other terms of this Option Agreement, USL shall (i) maintain policies of
environmental impairment liability insurance covering the ownership and
operation of the Landfarms in substantially such amounts and on such terms as
shall be in place on the Effective Date and (ii) comply with all applicable
federal or state governmental financial assurance requirements imposed in
connection with its operation of the Landfarms.

         10.      INDEMNIFICATION

                  10.1 Indemnification by USL. USL shall defend, indemnify and
hold harmless NESI and its Affiliates and their employees, officers, owners,
directors and agents, from and against any and all liabilities, penalties,
fines, forfeitures, demands, claims, causes of action, suits, judgments and
costs and expenses incidental thereto, including reasonable attorneys' fees,
which any or all of them may hereafter suffer, incur, be responsible for or pay
out as a result of personal injuries, property damage, or contamination of or
adverse effects on the environment, to the extent directly or indirectly caused
by, or arising from or in connection with (i) the negligence, gross negligence
or willful act or omission or willful misconduct of USL or any of its employees,
officers, owners, directors, agents or subcontractors in the performance of this
Option Agreement; (ii) the violation of any environmental rule, law or
regulation by USL or any of its employees, officers, owners, directors, agents
or subcontractors; (iii) operations of the Landfarms, including, without
limitation, the receipt and disposal of waste delivered to the Landfarms by NESI
and others; or (iv) the breach of, misrepresentation in, untruth in or
inaccuracy in any representation, warranty or covenant of USL set forth in this
Option Agreement.

                  10.2 Indemnification by NESI. NESI shall defend, indemnify and
hold harmless USL and its Affiliates and their employees, officers, owners,
directors, agents and subcontractors, from and against any and all liabilities,
penalties, fines, forfeitures, demands, claims, causes of action, suits,
judgments and costs and expenses incidental thereto, including reasonable
attorneys' fees, which any or all of them may hereafter suffer, incur, be
responsible for or pay out with respect to claims by third parties for personal
injuries, property damage or other loss to the extent directly or indirectly
caused by, or arising from or in connection with (i) the negligence, gross
negligence or willful act or omission of NESI, any of its employees, officers,
owners, directors, agents or subcontractors or any third-party generator acting
at NESI's direction in the performance of this Option Agreement, (ii) the
violation of any environmental rule, law or regulation by NESI, any of its
employees, officers, owners, directors, agents or subcontractors or any
third-party generator acting at NESI's direction; (iii) material delivered to
any of the Landfarms by NESI or any third-party generator acting at NESI's
direction which is not in accordance with the terms of this Option Agreement or
otherwise not permitted to be disposed at such Landfarm; or (iv) the breach of,
misrepresentation in, untruth in or inaccuracy in any representation, warranty
or covenant of NESI set forth in this Option Agreement.




<PAGE>   14

                  10.3     Indemnification Procedures.

                           10.3.1 Promptly after receipt by an indemnified party
under this Article X of notice of the commencement of any action or proceeding
evidenced by service of process or other legal pleading, such indemnified party
will, if a claim in respect thereof is to be made against the indemnifying party
hereunder, notify in writing the indemnifying party of the commencement thereof,
but the omission so to notify the indemnifying party (i) will not relieve it
from any liability that it may have to any indemnified party under this Article
X unless and to the extent that the indemnifying party has been prejudiced in
any material respect by such omission and (ii) will not relieve the indemnifying
party from any liability that it may have to any indemnified party other than
under this Article X. If any such action or proceeding shall be brought against
any indemnified party and it shall notify the indemnifying party of the
commencement thereof, the indemnifying party shall be entitled to participate
therein and, to the extent that it shall wish, to assume the defense thereof
with counsel reasonably satisfactory to such indemnified party (who shall not,
except with the consent of the indemnified party, be counsel to the indemnifying
party), and, after notice from the indemnifying party to such indemnified party
of its election so to assume the defense thereof, the indemnifying party shall
not be liable to such indemnified party under this Article X for any legal or
other expenses subsequently incurred by such indemnified party in connection
with the defense thereof unless the named parties to such action or proceeding
(including any impleaded parties) shall include both an indemnifying party and
an indemnified party and the indemnified party shall have been advised by
counsel that there may be one or more defenses available to such indemnified
party that are different from or additional to those available to the
indemnifying party (in which case, if the indemnified party notifies the
indemnifying party that it wishes to employ separate counsel at the expense of
the indemnifying party (who shall promptly pay all such expenses as incurred),
the indemnifying party shall not have the right to assume the defense of such
action or proceeding on behalf of such indemnified party).


                           10.3.2 If an indemnifying party, within a reasonable
period of time after notice by the indemnified party of the commencement of any
action or proceeding with respect to which the indemnified party is to make a
claim hereunder, fails to assume the defense thereof, the indemnified party
shall have the right (upon further notice to the indemnifying party) to
undertake the defense, compromise or settlement of such action or proceeding for
the account of the indemnifying party, subject to the right of the indemnifying
party to assume the defense of such action or proceeding at any time prior to
settlement, compromise or final determination thereof. The cost and expense of
any such defense and any judgment in any such action or proceeding shall be
borne by the indemnifying party, and, if paid by the indemnified party, shall be
reimbursed by the indemnifying party within thirty days after receipt of invoice
therefor.

                           10.3.3 Except as otherwise provided in Section
10.3.2, an indemnifying party shall not be liable for any settlement of any
litigation or proceeding effected without its written consent. An indemnifying
party shall not, without the indemnified party's written consent, settle or
compromise any action or proceeding or consent to entry of any judgment that
would impose an injunction or other equitable relief upon the indemnified party
or that does not include as an unconditional term thereof the release by the
claimant or the plaintiff of such indemnified party from all liability in
respect of such action or proceeding.




<PAGE>   15

         11.      DISPUTE RESOLUTION

                  11.1 Negotiation of Disputes. In the event of any dispute or
disagreement arising out of or relating to the implementation and performance of
this Option Agreement, the parties agree to attempt to resolve such dispute in
good faith. Should a resolution of such dispute not be obtained within 15 days
after the origination of the dispute, either party may in accordance with the
provisions of this Article XI file suit. Any suit filed by any party that
relates to this Option Agreement must be filed in Texas state court in Harris
County, Texas.

                  11.2 Continuation of Performance. In the event of a dispute
arising under this Option Agreement, the parties shall continue performance of
their respective obligations hereunder.

         12.      SUSPENSION OF PERFORMANCE

                  12.1 Suspension of Performance by USL. USL shall have the
right to suspend operations under this Option Agreement at the Bateman Island
Landfarm for any reason. Upon such suspension, USL shall give NESI written
notice of the basis for, and an estimate of, the length of the suspension.

                           12.1.1 If USL notifies NESI that it will temporarily
suspend operations at the Bateman Island Landfarm due to litigation, court order
or directive of any governmental body having jurisdiction over the operation of
the Landfarm, or substantial changes to laws or regulations, then NESI shall
continue to make all Payments in Full and on Time as this Option Agreement
requires; provided, however, that USL shall make available the Bourg and/or
Mermentau Landfarms to accept, in a timely fashion, delivery of that portion of
the Annual Volume that NESI would otherwise deliver to the Bateman Island
Landfarm under Section 3.1.l.a. If USL fails to make available either the Bourg
Landfarm or the Mermentau Landfarm to accept delivery, in a timely fashion, of
the NOW that NESI desires to deliver, up to the Annual Volume (prorated for the
period involved), then NESI shall be excused from payments due each month such
failure continues. Upon the resumption of operations at the Bateman Island
Landfarm, NESI may exercise its option to deliver NOW in accordance with Section
3.1.

                           12.1.2 If USL notifies NESI that it will temporarily
suspend operations at the Bateman Island Landfarm due to litigation, court order
or directive of any governmental body having jurisdiction over the operation of
the Landfarm, or substantial changes to laws or regulations, then NESI shall
continue to make all Payments in Full and on Time as this Option Agreement
requires; provided, however, that USL shall make available the Bourg and/or
Mermentau Landfarms to accept, in a timely fashion, delivery of that portion of
the Annual Volume that NESI would otherwise deliver to the Bateman Island
Landfarm under Section 3.1.l.a. If USL fails to make available either the Bourg
Landfarm or the Mermentau Landfarm to accept delivery, in a timely fashion, of
the NOW that NESI desires to deliver, up to the Annual Volume (prorated for the
period involved), then NESI shall be excused from payments due each month such
failure continues. Upon the resumption of operations at the Bateman Island
Landfarm, NESI may exercise its option to deliver NOW in accordance with Section
3.1.

                           12.1.3 If USL notifies NESI that it will temporarily
suspend operations at the Bateman Island Landfarm voluntarily for any reason
other than under Section 12.1.1 or 12.1.2 above, NESI is excused from payments
due each month that operations are suspended. Upon the 



<PAGE>   16

resumption of operations at the Bateman Island Landfarm, NESI shall resume
payments and may exercise its option to deliver NOW in accordance with Section
3.1.

                           12.1.4 If operations are temporarily suspended at the
Bourg, Bateman Island and Mermentau Landfarms at once or in reasonably close
succession, then NESI is excused from payments due each month that operations
are suspended. Upon the resumption of operations at any Landfarm, and provided
USL makes any Landfarrn available to accept delivery in a timely fashion, of the
NOW that NESI desires to deliver, up to the Annual Volume (prorated for the
period involved), then NESI shall resume payments and may exercise its option to
deliver NOW in accordance with Section 3.1.

                           12.1.5 Whenever, in accordance with the foregoing
provisions of this Section 12.1, NESI is excused from making payments of a
portion of the Option Payment for any month or months, such excuse shall be a
permanent excuse, and the total Option Payment for the Option Year or Option
Years in which such excuse occurs shall be reduced accordingly.

                  12.2 Suspension of Performance by NESI. NESI has no right to
suspend its performance except as specifically provided elsewhere in this Option
Agreement and any other suspension or attempt to suspend its obligations shall
constitute breach of this Option Agreement. Disapproval, instruction or
communication by a customer of NESI, including any request by any NESI customer
as to where its waste should be delivered, in a manner contrary to the terms of
this Option Agreement shall not constitute force majeure nor provide a basis for
suspension of performance.


         13.      MISCELLANEOUS

                  13.1 Status of the Parties. Each party hereto is and shall
perform this Option Agreement as an independent contractor, and as such, shall
have and maintain complete control over all of its employees, agents, and
operations. Except as expressly otherwise provided in this Option Agreement,
neither party nor anyone employed by it shall be, represent, act, purport to act
or be deemed to be the agent, representative, employee or servant of the other
party.

                  13.2 No Set-Off Rights. The parties hereby agree that neither
party shall have any right to set-off or apply against any sums due under this
Option Agreement any sums due or amounts otherwise owing pursuant to any other
provision of this Option Agreement or any other agreement or arrangement between
the parties.

                  13.3 Subrogation; Assignment of Rights. In the event NESI
delivers and USL accepts a delivery of materials (the "Nonconforming Materials")
containing hazardous or dangerous substances in violation of this Option
Agreement and in violation of NESI's agreement with the third-party generator
producing such materials, NESI agrees that, upon the request of USL, USL shall
become fully subrogated to the rights of NESI against such generator related to
the Nonconforming Materials, and NESI shall (i) assign or take such further
action as is necessary or desirable to transfer to USL any and all rights of
action of NESI against such generator relating to such Nonconforming Materials
arising at law under NESI's agreement with such generator or



<PAGE>   17

in equity and (ii) use its good faith best efforts to assist in the prosecution
of any claim brought by USL against such third party generator relating to the
Nonconforming Materials.

                  13.4     Binding Effect; Assignment. This Option Agreement
shall be binding upon and inure to the benefit of the parties hereto and their
respective successors and assigns. USL and NESI may assign their rights,
obligations and duties under this Option Agreement with the written consent of
the other parties to the Agreement, which consent shall not be unreasonably
withheld; provided that the assigning party shall remain primarily liable for
all obligations and duties arising hereunder. Without limiting the generality of
the foregoing, if USL sells the Landfarms and/or related business, the purchaser
shall assume USL's obligations under this Option Agreement, and NESI shall
retain its obligations under this Option Agreement.

                  13.5     Notices.

                           13.5.1 General. Except under Section 3.1.1, notices
and other communications provided for in this Option Agreement shall be in
writing and shall be deemed to have been validly given (a) three calendar days
after deposit in the United States mails, registered or certified mail with
proper postage prepaid and return receipt requested; (b) upon transmission
thereof and receipt of the appropriate confirmation if sent via telecopier or
telefax; (c) the business day after the same shall have been deposited with a
reputable overnight courier, shipping prepaid; and (d) if delivered in person,
upon delivery, in each case addressed as follows:

If to NESI or Newpark:                  With a copy to:

   c/o Newpark Resources, Inc.              Ervin, Cohen & Jessup
   3850 North Causeway, Suite 1770          9401 Wilshire Boulevard
   Metairie, LA 70002                       Beverly Hills, CA 90212
   Attention: James D. Cole, President      Attention: Bertram K. Massing, Esq.
   Facsimile No.: (504) 833-9506            Facsimile No.: (310) 859-2325

If to USL:                              With a copy to:

   U.S. Liquids, Inc.                       Baker & Botts, L.L.P.
   411 N. Sam Houston Parkway East          One Shell Plaza
   Houston, TX 77060                        910 Louisiana
   Attention: W. Greg Orr, President        Houston, TX  77002-4995
   Facsimile No.: (281) 272-4545            Attention:  Philip J. John, Esq.
                                            Facsimile No.: (713) 229-1522

or such other address as any party shall specify by written notice so given.

                           13.5.2 Other Notices. Notices provided for in Section
3.1.1 shall be made in writing by telefax or mailed to USL as follows:

                                    U.S. Liquids, Inc.
                                    Division Manager
                                    P.O. Box 1467



<PAGE>   18

                                    Jennings, LA 70546
                                    Attention: Jerry Brazell
                                    Facsimile No.: (318) 824-3147

                  13.6 Opportunity to Cure. In the event that NESI (i) fails to
pay USL any amount required under this Option Agreement on or before the date
such payment is due and such payment is not excused by Section 12.1 and/or (ii)
otherwise fails to perform under this Option Agreement, USL shall give notice to
NESI of its failure to perform in accordance with Section 13.5. The notice shall
include a description of the manner in which NESI failed to perform under this
Option Agreement and shall include the date on which performance was due. NESI
shall have fifteen (15) calendar days from the date notice is deemed validly
given to correct or cure its failure to perform under this Option Agreement. If
NESI fails to do so, then such failure shall constitute a breach of this Option
Agreement. If NESI receives from USL notice that NESI has failed to pay USL any
amount required, due and not otherwise excused under this Option Agreement and
NESI fails to correct or cure such failure within 15 days from the date such
notice is given, then such failure shall be deemed failure to make Payment in
Full and on Time and shall constitute a breach of this Option Agreement. Failure
by USL to act in accordance with this Section shall not itself constitute a
breach of this Option Agreement nor shall such failure cause USL to waive or
relinquish any right or option provided by any Section in this Option Agreement;
provided, however, that NESI shall not be deemed to have breached this Option
Agreement unless and until notice of such alleged breach shall have been given
in accordance with this section, and NESI shall have failed to cure or correct
its failure to perform as specified in such notice.

                  13.7 Non-Waiver. The failure of any party to enforce its
rights under any provision of this Option Agreement shall not be construed to be
a waiver of such provision. No waiver of any breach of this Option Agreement
shall be held to be a waiver of any other breach.

                  13.8 Entire Agreement; Amendment. This Option Agreement, the
Payment Agreement and the Other Agreements referred to in the Payment Agreement
constitute the entire agreement between the parties concerning the subject
matter hereof and supersede any and all other communications, representations,
proposals, understandings or agreements, either written or oral, between the
parties hereto with respect to such subject matter. This Option Agreement may
not be modified or amended, in whole or in part, except by a writing signed by
both parties hereto.

                  13.9 Severability. If any provision of this Option Agreement
is declared invalid or unenforceable, then such portion shall be deemed to be
severable from this Option Agreement and shall not affect the remainder hereof.

                  13.10 Headings. The Article and Section headings contained
herein are for reference purposes only and shall not in any way affect the
meaning and interpretation of this Option Agreement.

                  13.11 Counterparts. This Option Agreement may be executed in
any number of counterparts, each of which shall be deemed an original and all of
which shall constitute one instrument.

                  13.12 Governing Law. This Option Agreement SHALL BE GOVERNED
BY AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF TEXAS.


                      [SIGNATURES BEGIN ON FOLLOWING PAGE]



<PAGE>   19



         ON THIS DATE, the Parties have executed multiple originals of this
Option Agreement.


                                     NEWPARK ENVIRONMENTAL SERVICES, INC.

Dated: December 31, 1998             By:
                                     Name:
                                     Title:


                                     NEWPARK RESOURCES, INC.

Dated: December 31, 1998             By:
                                     Name:
                                     Title:


                                     U.S. LIQUIDS, INC.

Dated: December 31, 1998             By:
                                                   Name:
                                     Title:





<PAGE>   1
                                                                   EXHIBIT 10.19





                            ASSET PURCHASE AGREEMENT


                                       BY

                                       AND

                                     BETWEEN


                      NEWPARK ENVIRONMENTAL SERVICES, INC.


                                       AND


                               U.S. LIQUIDS, INC.







                            Dated as of the 16th day
                               of September, 1998

<PAGE>   2



                            ASSET PURCHASE AGREEMENT


         This ASSET PURCHASE AGREEMENT (this "Agreement") dated September 16,
1998 by and among Newpark Environmental Services, Inc., a Delaware corporation
("NESI" or "Seller"), and U.S. Liquids, Inc., a Delaware corporation ("USL" or
"Purchaser").

         WHEREAS, one of Seller's lines of business is the Cleaning Business as
defined herein and activities related thereto; and

         WHEREAS, Purchaser wishes to purchase from Seller and Seller wishes to
sell, transfer, assign and deliver to Purchaser the Acquisition Assets (as
hereinafter defined) on the terms and subject to the conditions set forth
herein;

         NOW, THEREFORE, in consideration of the premises and the
representations, warranties, covenants and agreements stated herein, the parties
hereto covenant and agree as follows:



<PAGE>   3

                                   I. ARTICLE

                                   DEFINITION

I.1 Section Accounting Terms. All accounting terms not specifically defined
herein shall be construed in accordance with generally accepted accounting
principles.

I.1 Section Defined Terms. As used in this Agreement, the following terms have
the meanings specified in this Section 1.2. Other capitalized terms have the
meanings assigned to them elsewhere in this Agreement.

         Affiliate: with respect to any Person, means any Person directly or
indirectly controlling, controlled by or under common control with such Person,
and any natural Person who is an officer, director or partner of such Person and
any members of their immediate families living within the same household. A
Person shall be deemed to control another Person if such Person possesses,
directly or indirectly, the power to direct or cause the direction of the
management and policies of such other Person, whether through the ownership of
voting securities, by contract or otherwise.

         CERCLA: means the Comprehensive Environmental Response, Compensation
and Liability Act of 1980, as amended.

         Cleaning Business: shall include but is not limited to any one or more
of the following activities: (1) performance of onshore and/or offshore cleaning
of tanks, barges, vessels, containers or other similar structures used in the
storage and/or transportation of NOW; and (2) the lease, rental or sale of labor
and/or equipment involved in cleaning. Code: means the Internal Revenue Code of
1986, as amended, or any amending or superseding tax laws of the United States
of America.

         Environmental Laws: means any and all laws, common law, statutes,
ordinances, rules, regulations, judgments, orders or other official acts or
determinations of any Governmental Authority relating to the protection of human
health or safety or regulating or imposing liability or standards of conduct
concerning any hazardous, toxic or dangerous waste, substance, element,
compound, mixture or material in any and all jurisdictions in which property of
Seller is located or the business of Seller is conducted or in which such
business at any time has been conducted, including, without limitation, (a)
CERCLA, (b) RCRA, (c) the Solid Waste Disposal Act, as amended, (d) the
Hazardous and Solid Waste Amendments Act of 1984, as amended, (e) the Clean Air
Act, as amended, (f) the Toxic Substances Control Act, as amended, (g) the Safe
Drinking Water Act, as amended, (h) the Federal Water Pollution Prevention and
Control Act, as amended, (i) the Occupational Safety and Health Act of 1970, as
amended, (j) the Hazardous Materials Transportation Act, as amended, (k) the
Rivers and Harbors Act of 1899, as amended, and (l) any rules and regulations
promulgated pursuant to any or all of (a) through (k) above. The terms "release"
or "threatened release" shall have the meanings specified in CERCLA, and the
terms "solid waste" and "disposal" (or "disposed") shall have the meanings
specified in RCRA; provided, however, that, to the extent the laws of any
jurisdiction applicable to Seller or any of their respective properties or
assets establish a meaning for "release," "solid waste" or "disposal" which is
broader than that specified in either CERCLA or RCRA, such broader meaning shall
apply in such jurisdiction.


<PAGE>   4

         Governmental Authority: means any nation or government, any state or
political subdivision thereof and any entity exercising executive, legislative,
judicial, regulatory or administrative functions of, or pertaining to,
government.

         Permitted Encumbrances: means (a) minor defects and irregularities
affecting title to the Acquisition Assets, but only if such defects and
irregularities do not and will not impair in any material respect the operation,
value, marketability or use of the asset affected by such defect or
irregularity; and (b) rights reserved to or vested in any governmental body to
control or regulate any asset in any manner that does not materially impair the
value or use of such asset.

         Person: means any individual, partnership, joint venture, corporation,
limited liability company, association, trust, unincorporated organization,
government or agency or subdivision thereof or any other entity.

         RCRA: means the Resources Conservation and Recovery Act of 1976, as
amended.

         Subsidiary or Subsidiaries: means, with respect to any specified
Person, a corporation, partnership, joint venture, trust, limited liability
company, unincorporated organization or other Person at least a majority of
whose securities having ordinary voting power for the election of its board of
directors or other similar managing body are, at the time as of which any
determination is being made, owned legally or beneficially by such Person or one
or more Subsidiaries thereof. Tax Return: means any return, report, statement,
information return or other document (including any related or supporting
information) filed or required to be filed with any Governmental Authority in
connection with the determination, assessment or collection of any Taxes or the
administration of any laws, regulations or administrative requirements relating
to any Taxes.

         Taxes: means all federal, foreign, state, local or other net or gross
income, gross receipts, sales, use, transfer, real property gains or transfer,
ad valorem, property, value-added, franchise, production, severance, windfall
profit, withholding, payroll, employment, excise or similar taxes, assessments,
duties, fees, levies or other governmental charges, together with any interest
thereon, any penalties, additions to tax or additional amounts with respect
thereto and any interest in respect of such penalties, additions or additional
amounts.


                                    I ARTICLE

                                     CLOSING

         Closing. The closing of the purchase and sale provided for herein (the
"Closing") shall take place at the offices of U.S. Liquids, Inc., 411 North Sam
Houston Parkway East, Suite 400, Houston, Texas 77060, on the date hereof, or at
such other place, time or date as may be agreed upon by the parties hereto (the
"Closing Date").



<PAGE>   5
                                   I ARTICLE

                           PURCHASE, SALE AND DELIVERY

I.1 Section Acquisition Assets. Subject to the terms and conditions of this
Agreement, and on the basis of the representations and warranties hereinafter
set forth, at the Closing Newpark shall sell, transfer, convey, assign and
deliver to Purchaser, and Purchaser shall acquire and purchase from Newpark, the
assets of Newpark attached hereto (the " Acquisition Assets"), free and clear of
any and all Liens, other than Permitted Encumbrances.

I.1 Section Purchase Price. The consideration for the purchase of the
Acquisition Assets is $2,150,000 (collectively, the price for the Acquisition
Assets shall be referred to as the "Purchase Price"). The Purchase Price has
been, shall be paid or shall be deemed to have been paid as follow:

(a) At the Closing, Purchaser shall pay $537,500 to Seller;

(a) Purchaser shall pay to Seller $537,500 on each of the following three dates:
October 1, 1998, January 1, 1999, and March 1, 1999.

All such payments of the Purchase Price by Purchaser to Seller shall be by wire
transfer to an account designated in writing by Seller or by a bank cashier's
check made payable to Seller.

I.1 Section Further Assistance. Seller shall execute and deliver to Purchaser,
at the Closing or thereafter, any other instrument which may be requested by
Purchaser and which is reasonably appropriate to perfect or evidence any of the
sales, assignments, transfers or conveyances contemplated by this Agreement or
to transfer any Acquisition Assets.


                                   I ARTICLE

                           LIABILITIES AND OBLIGATIONS

         Liabilities Not Assumed by Purchaser. Purchaser does not hereby assume
or agree to pay, perform or discharge, and shall not be responsible for, any
liabilities or obligations of Seller, whether accrued, absolute, contingent or
otherwise, including, without limitation, liabilities or obligations based on,
arising out of or in connection with (i) payment or nonpayment of Taxes, (ii)
any employee relating to service rendered prior to the Closing Date and under
any pension plan or agreement or employee benefit plan, (iii) claims or
conditions arising under or relating to Environmental Laws, or (iv) any claim,
litigation or proceeding, whether now pending or hereafter initiated, to the
extent based on any act or omission of Seller occurring before the Closing Date.



<PAGE>   6

                                   I ARTICLE

                    REPRESENTATIONS AND WARRANTIES OF SELLER

        Seller represents, warrants and agrees to and with Purchaser as follows:

I.1 Section Organization; Qualification. Seller is a corporation duly organized,
validly existing and in good standing under the laws of the State of Delaware.
Seller is duly licensed or qualified as an entity to do business and is in good
standing in all jurisdictions wherein the character of the properties owned or
held by it or the nature of the business transacted by it requires it to be so
licensed or qualified.

I.1 Section Authority; Enforceability. Seller has all requisite corporate power
and authority to own and operate its assets and properties and to carry on its
business as presently conducted, to enter into this Agreement and to perform its
other obligations under this Agreement. The execution, delivery and performance
of this Agreement and the transactions contemplated hereby have been duly and
validly authorized by all requisite corporate action on the part of Seller. This
Agreement has been duly and validly executed and delivered by Seller. There is
no action, claim, suit, arbitration, investigation or proceeding pending or
threatened against Seller which purports to affect the validity or
enforceability of this Agreement or that seeks to prohibit, restrict or delay
the consummation of the transaction contemplated hereby.

I.1 Section Binding Agreement. This Agreement constitutes, as of the date
hereof, and this Agreement and all documents and instruments required hereunder
to be executed and delivered by Seller at Closing will constitute, on the
Closing Date, legal, valid and binding obligations of Seller enforceable against
Seller in accordance with their respective terms.

I.1 Section Conflicting Agreements and Other Matters; Consents. The execution
and delivery of this Agreement does not, the fulfillment of or compliance with
the terms and provisions hereof will not, and the consummation of the
transactions contemplated hereby will not (i) violate or conflict with any
provision of, or require any notice, consent, authorization or approval under,
the charter or bylaws of Seller, (ii) violate or conflict with any provision of
any judicial, administrative or arbitration order, award, judgment, writ,
injunction or decree applicable to or binding upon Seller or to which any of its
assets or properties is subject, or (iii) constitute a default under any
agreement or instrument to which Seller is a party or by which Seller is bound
or to which any of its properties is subject.

I.1 Section Title to Properties; Condition of Acquisition Assets. Seller has
good and marketable title to the Acquisition Assets and the Acquisition Assets
are not subject to any lien, including, without limitation, liens with respect
to Taxes, or encumbrance. The Acquisition Assets are in good operating condition
and repair (subject to normal wear and tear) and are adequate for the uses to
which they are being put, and none of the Acquisition Assets is in need of
maintenance or repairs except for ordinary, routine maintenance and repairs that
are not material in nature or cost. EXCEPT AS EXPRESSLY SET FORTH IN THIS
AGREEMENT, SELLER HEREBY DISCLAIMS ANY AND ALL EXPRESS AND IMPLIED WARRANTIES
CONCERNING THE ACQUISITION ASSETS, INCLUDING, BUT NOT LIMITED TO, THE PHYSICAL
CONDITION OF THE ACQUISITION ASSETS AND THEIR FITNESS FOR ANY PARTICULAR
PURPOSE. SELLER IS SELLING, AND PURCHASER IS PURCHASING, THE ACQUISITION ASSETS
"AS IS."




<PAGE>   7


                                   I ARTICLE

                   REPRESENTATIONS AND WARRANTIES OF PURCHASER

        Purchaser hereby represents, warrants and agrees to and with Seller as
follows:

I.1 Section Corporate Existence. Purchaser is a corporation duly incorporated,
validly existing and in good standing under the laws of the State of Delaware.

I.1 Section Authority; Absence of Conflicts; Enforceability. Purchaser has all
requisite corporate power and authority to carry on its business as presently
conducted, to enter into this Agreement and to perform its obligations under
this Agreement. The execution, delivery and performance of this Agreement and
the transactions contemplated hereby have been duly and validly authorized by
all requisite corporate action on the part of Purchaser. This Agreement has been
duly and validly executed and delivered by Purchaser. The consummation of the
transactions contemplated by this Agreement will not violate, or be in conflict
with, any provision of Purchaser's certificate of formation, any agreement or
instrument to which Purchaser is a party or by which Purchaser is bound or any
law applicable to Purchaser. There is no action, claim, suit, arbitration,
investigation or proceeding pending or threatened against Purchaser which
purports to affect the validity or enforceability of this Agreement or that
seeks to prohibit, restrict or delay the consummation of the transactions
contemplated hereby.

I.1 Section Binding Agreement. This Agreement constitutes, as of the date
hereof, and this Agreement and all documents and instruments required hereunder
to be executed and delivered by Purchaser at Closing will constitute, on the
Closing Date, legal, valid and binding obligations of Purchaser enforceable
against Purchaser, as the case may be, in accordance with their respective
terms.


                                   I ARTICLE

                              CONDITIONS TO CLOSING

I.1 Section Conditions to Obligations of Purchaser. The obligations of Purchaser
to consummate the transactions contemplated herein are subject, at the option of
Purchaser, to satisfaction of the following conditions:

(a) Compliance. Seller shall have complied with their covenants and agreements
contained herein, and the representations and warranties contained in Article V
hereof shall be true and correct on the date hereof and as of the Closing Date.

(a) Seller's Resolutions. Seller shall deliver to Purchaser certified copies of
resolutions duly adopted by the board of directors of each Seller authorizing
and approving the execution and delivery of this Agreement, including any
attachment hereto, and the consummation of the transactions contemplated herein.

(a) Transfer Documents. Seller shall execute and deliver to Purchaser such bills
of sale and other instruments of sale, transfer, conveyance, assignment and
delivery covering the Acquisition Assets or any part thereof, executed by Seller
or other appropriate parties, as 




<PAGE>   8


Purchaser may reasonably require to assure the full and effective sale,
transfer, conveyance, assignment and delivery to Purchaser of the Acquisition
Assets.

I.1 Section Conditions to Obligations of Seller. The obligations of Seller to
consummate the transactions contemplated herein are subject, at the option of
Seller, to satisfaction of the following condition: Purchaser shall have
complied with its covenants and agreements contained herein, and the
representations and warranties contained in Article VI hereof shall be true and
correct on the date hereof and as of the Closing Date.


                                   I ARTICLE

                                 INDEMNIFICATION

I.1 Section Seller's Indemnity Obligations. Seller shall indemnify and hold
Purchaser (including its officers, directors, employees and agents) harmless
from and against any and all claims, actions, causes of action, arbitrations,
proceedings, losses, damages, liabilities, judgments and expenses (including,
without limitation, reasonable attorneys' fees) ("Indemnified Amounts") incurred
by Purchaser as a result of (a) any breach or misrepresentation in any of the
representations and warranties made by or on behalf of Seller in this Agreement,
(b) any violation or breach by Seller of or default by Seller under the terms of
this Agreement, (c) except for liabilities and obligations expressly assumed by
Purchaser pursuant to this Agreement, any act or omission by Seller, including,
without limitation, those acts or omissions relating to intellectual property
rights or to products manufactured or sold by Seller, occurring prior to the
Closing Date with respect to the Seller's business or the Acquisition Assets,
(d) any act or omission occurring after the Closing Date by Seller with respect
to Seller's business or (e) any of Seller's Liabilities.

I.1 Section Purchaser's Indemnity Obligations. Purchaser shall indemnify and
hold Seller (including its officers, directors, employees and agents) harmless
from and against any and all Indemnified Amounts incurred by Seller as a result
of (a) any breach or misrepresentation in any of the representations and
warranties made by or on behalf of Purchaser in this Agreement, (b) any
violation or breach by Purchaser of or default by Purchaser under the terms of
this Agreement or (c) any act or omission occurring after the Closing Date by
Purchaser with respect to the Acquisition Assets.


                                   I ARTICLE

                                  MISCELLANEOUS

I.1 Section Survival. Except as otherwise provided herein, the representations
and warranties set forth in this Agreement and in any certificate or instrument
delivered in connection herewith shall be continuing and shall survive the
Closing for a period of one (1) year following the Closing Date, notwithstanding
any investigation at any time made by or on behalf of Purchaser, but shall
thereafter terminate and be of no further force or effect; provided, however,
that in the case of all representations and warranties, there shall be no such
termination with respect to any such representation or warranty as to which a
bona fide claim has been asserted by written notice of such claim delivered to
the party or parties making such representation or warranty prior to the
expiration of the survival period.





<PAGE>   9

I.1 Section Expenses. Except as otherwise expressly provided herein, each party
shall bear its own respective expenses incurred in connection with the
negotiation, preparation and execution of this Agreement and the transactions
contemplated hereby, including his or its own consultant's fees, attorneys'
fees, accountants' fees, investment banking and loan fees and other similar
costs and expenses.

I.1 Section Notices. All notices and other communications hereunder shall be in
writing and shall be deemed to have been received only if and when (a)
personally delivered or (b) on receipt after mailing, by United States mail,
first class, postage prepaid, by certified mail return receipt requested, or by
facsimile transmission to the respective parties, addressed in each case as
follows (or to such other address as may be specified by like notice):

         (i)      If to Seller, to: Newpark Environmental Services, Inc.
                                            3850 North Causeway, Suite 1770
                                            Metairie, LA  77002
                                            Attention:  James D. Cole, President
                                            Facsimile No.:  (504) 833-9506

         (ii)     If to Purchaser, to:      U.S. Liquids, Inc.
                                            411 N. Sam Houston Parkway East
                                            Houston, Texas 77060
                                            Attention:  W. Greg Orr, President
                                            Facsimile:  (281) 272-4545

I.1 Section Entire Agreement. This Agreement, including any attachments hereto,
which attachments are incorporated herein by reference and deemed to be a part
of this Agreement, and the Noncompetition Agreement constitute the entire
agreement of the parties with respect to the subject matter hereof, and may not
be modified, amended or terminated except by a written instrument specifically
referring to this Agreement signed by all the parties hereto. Concurrently with
the execution and delivery of this Agreement, the parties and Newpark Resources,
Inc., a Delaware corporation, are executing the following additional agreements
(the "New Deal Agreements"): Settlement of Arbitration and Release, NOW Payment
Agreement, Noncompetition Agreement and Miscellaneous Agreement. In the event of
any conflict between the provisions of this Agreement and any of the New Deal
Agreements, the provisions of the New Deal Agreement or Agreements shall
control.

I.1 Section Governing Law. THIS AGREEMENT SHALL BE GOVERNED, CONSTRUED AND
ENFORCED IN ACCORDANCE WITH THE LAWS OF THE STATE OF TEXAS WITHOUT GIVING EFFECT
TO THE PRINCIPLES OF CONFLICTS OF LAWS THEREOF.

I.1 Section Assignments and Third Parties. Except as otherwise provided herein,
this Agreement shall be binding upon and inure to the benefit of the parties
hereto and their respective successors and assigns. No party hereto shall assign
this Agreement or any part hereof without the prior written consent of the other
party; provided, however, that it is understood and agreed that Purchaser may
assign all or any portion of its rights and delegate all or any portion of its
duties hereunder to an Affiliate of Purchaser, in which event the assignee of
Purchaser shall execute and deliver all documents, certificates and other
instruments to be executed and delivered by Purchaser at the Closing in lieu of
Purchaser, which documents, certificates and other instruments shall be
appropriately modified to conform to such assignee's 



<PAGE>   10


organizational status. No assignment shall release a party of any of its
obligations under this Agreement.

I.1 Section Severability. If any term or other provision of this Agreement is
invalid, illegal or incapable of being enforced by any rule of law or public
policy, all other conditions and provisions of this Agreement shall nevertheless
remain in full force and effect so long as the economic or legal substance of
the transactions contemplated hereby is not affected in any manner materially
adverse to any of the parties hereto. Upon such determination that any term or
other provision is invalid, illegal or incapable of being enforced, the parties
hereto shall negotiate in good faith to modify this Agreement so as to effect
the original intent of the parties as closely as possible in an acceptable
manner to the end that the transactions contemplated hereby are fulfilled to the
extent possible.

I.1 Section Amendments; No Waivers. Any provision of this Agreement may be
amended or waived prior to the Closing Date if, and only if, such amendment or
waiver is in writing and signed, in the case of an amendment, by all parties
hereto, or in the case of a waiver, by the party against whom the waiver is to
be effective. No failure or delay by any party in exercising any right, power or
privilege hereunder shall operate as a waiver thereof nor shall any single or
partial exercise thereof preclude any other or further exercise thereof or the
exercise of any other right, power or privilege. The rights and remedies herein
provided shall be cumulative and not exclusive of any rights or remedies
provided by law.

I.1 Section No Third-Party Beneficiaries. Nothing in this Agreement shall
entitle any Person other than the parties hereto or their respective successors
and assigns permitted hereby to any claim, cause of action, remedy or right of
any kind.

I.1 Section Headings; Use of Certain Terms. The headings and table of contents
included herein are for convenience only and shall have no significance in the
interpretation hereof. Unless the context shall otherwise require, the singular
shall include the plural and vice versa, and each pronoun in any gender shall
include all other genders.

I.1 Section Counterparts. This Agreement may be executed in any number of
counterparts, each of which shall be deemed for all purposes to be an original,
but all of which together shall constitute one and the same agreement.



<PAGE>   11



         ON THIS DATE, the Parties have executed multiple originals of this
Asset Purchase Agreement.


                                           NEWPARK ENVIRONMENTAL SERVICES, INC.



Dated:                                     By:
      ---------------------------          Name:
                                           Title:



                                           U.S. LIQUIDS, INC.



Dated:                                     By:
      ---------------------------          Name:
                                           Title:




<PAGE>   1
                                                                   EXHIBIT 10.20


                      AMENDMENT TO ASSET PURCHASE AGREEMENT

         THIS AMENDMENT TO ASSET PURCHASE AGREEMENT (the "Amendment") is made
and entered into as of September 22, 1998, by and between U.S. Liquids, Inc., a
Delaware corporation ("USL" or "Purchaser"), and Newpark Environmental Services,
Inc., a Delaware corporation ("NESI" or "Seller") (collectively the "Parties")
with reference to the following facts:

         A.       On September 17, 1998, NESI and USL entered into an agreement
captioned "Asset Purchase Agreement" (the "Agreement").

         B.       The Parties now desire to supplement and amend certain
provisions of the Agreement. Terms used in this Amendment that are defined in
the Agreement shall have the same meanings herein as in the Agreement unless
otherwise provided in this Amendment.

         NOW THEREFORE, the Parties hereby agree as follows:

         1.       The Closing under the Agreement shall occur on, and the
Closing Date shall be, September 22, 1998.

         2.       Section 3.1 of the Agreement is hereby amended to read as
follows:

                  "Section 3.1 Acquisition Assets. Subject to the terms and
         conditions of this Agreement, and on the basis of the representations
         and warranties hereinafter set forth, at the Closing NESI shall sell,
         transfer, convey, assign and deliver to Purchaser, and Purchaser shall
         acquire and purchase from NESI, the assets of NESI listed on Exhibit B
         attached hereto (the "Exhibit B Assets"), free and clear of any and all
         liens other than Permitted Encumbrances. After the Closing, NESI agrees
         to use commercially reasonable efforts to acquire title to the assets
         listed on Exhibit A attached hereto (the "Exhibit A Assets") and to
         transfer, convey, assign and deliver the Exhibit A Assets to Purchaser,
         free and clear of any and all liens other than Permitted Encumbrances,
         without additional consideration. The Exhibit A Assets and the Exhibit
         B Assets are sometimes collectively referred to herein as the
         "Acquisition Assets." NESI's failure to acquire title to the Exhibit A
         Assets shall not constitute a breach of this Agreement and shall not
         entitle Purchaser to any reduction in the Purchase Price."

         3.       Section 3.2 of the Agreement is hereby amended to read as
follows:

                  "3.2 Purchase Price. The consideration for the purchase of the
         Acquisition Assets (or for the Exhibit B Assets, if Newpark does not
         acquire the Exhibit A Assets) is $2,150,000 (collectively, the
         "Purchase Price"). The Purchase Price has been paid or shall be paid as
         follows: [balance of Section unchanged]"

         4.       Exhibit A and Exhibit B to the Agreement are attached to this
Amendment and are hereby incorporated by reference into the Agreement.





<PAGE>   2

         5.       Section 5.5 of the Agreement is hereby amended to read as 
follows:

         "Section 5.5 Title to Properties; Condition of Acquisition Assets.
         Seller has good and marketable title to the Exhibit B Assets. When
         transferred to Purchaser, the Acquisition Assets so transferred will
         not be subject to any lien, including, without limitation, liens with
         respect to Taxes, or encumbrance. The Exhibit B Assets are in good
         condition and repair (subject to normal wear and tear) and are adequate
         for the purposes to which they are being put, and none of the Exhibit B
         Assets is in need of maintenance or repairs except for ordinary,
         routine maintenance and repairs that are not material in cost. EXCEPT
         AS EXPRESSLY SET FORTH IN THIS AGREEMENT, SELLER HEREBY DISCLAIMS ANY
         AND ALL EXPRESS AND IMPLIED WARRANTIES CONCERNING THE ACQUISITION
         ASSETS, INCLUDING BUT NOT LIMITED TO THE PHYSICAL CONDITION OF THE
         ACQUISITION ASSETS AND THEIR FITNESS FOR ANY PARTICULAR PURPOSE. SELLER
         IS SELLING, AND PURCHASER IS PURCHASING, THE ACQUISITION ASSETS `AS
         IS'. "

         6.       Except as hereby amended, the Agreement is and shall remain in
full force and effect in accordance with its terms.


         IN WITNESS WHEREOF, the Parties have executed multiple originals of
this Amendment as of September 22, 1998.


                                       NEWPARK ENVIRONMENTAL SERVICES, INC.
                                       U.S. LIQUIDS, INC. 

                                       By:
                                          --------------------------------------
                                          James D. Cole, Chairman


                                          --------------------------------------
                                          W. Gregory Orr, President





<PAGE>   1
                                                                   EXHIBIT 10.21


                 NONCOMPETITION AGREEMENT OF SEPTEMBER 16, 1998

         This Noncompetition Agreement (the "Agreement") dated September 16,
1998, is made and entered into by and between U.S. LIQUIDS, INC., a Delaware
corporation ("U.S. Liquids" or "USL" herein), and NEWPARK RESOURCES, INC., a
Delaware corporation ("Newpark" herein), with reference to the following facts:

         On this day the parties agreed:

                  a. To execute and deliver a Settlement of Arbitration and
Release dated September 16, 1998 (the "Release"), which, to the extent provided
in the Miscellaneous Agreement, (i) terminates the NOW Disposal Agreement dated
June 4, 1996; and (ii) the Noncompetition Agreement dated August 12, 1996;

                  b. To execute and deliver a NOW Payment Agreement dated
September 16, 1998 (the "NOW Payment Agreement");

                  c. To execute and deliver an Asset Purchase Agreement dated
September 16, 1998 (the "Purchase Agreement");

                  d. To execute and deliver the Miscellaneous Agreement dated
September 16, 1998 (the "Miscellaneous Agreement"); and

                  e. To execute and deliver this Noncompetition Agreement of
September 16, 1998.

         In consideration of the foregoing, and for other good and valuable
consideration, the receipt and sufficiency of which are hereby acknowledged, USL
and Newpark hereby agree and covenant as follows.

         1        Certain Definitions. The following terms used herein shall
have the following meanings:

                  Affiliate or affiliate - A Person that directly or indirectly,
         through one or more intermediaries, controls, is controlled by or is
         under common control with the Person specified. For purposes of this
         definition, "control" (including the terms "controlling, " "controlled
         by" and "under common control with") of a Person means the possession,
         directly or indirectly, of the power to (a) vote 50% or more of the
         voting interests in such Person or (b) direct or cause the direction of
         the management and policies of such Person, whether by contract or
         otherwise. At all times during the term of this Agreement, Persons
         controlled by USL or one or more of its controlled Affiliates, or
         jointly controlled by USL and one or more of its controlled Affiliates,
         shall be deemed to be Affiliates of USL. Notwithstanding the foregoing,
         a Person who acquires control of USL after the Effective Date of this
         Agreement shall not be bound by this Agreement solely by reason of such
         control, with respect to the 




<PAGE>   2



         continuation of activities in which such Person was engaged immediately
         prior to its acquisition or control of USL.

                  Business - Any one or more of the following activities: the
         Collection or Disposal of NOW; the remediation and closure of oilfield
         waste pits, including related loading and hauling; and marketing,
         dealing in or soliciting orders for any of the products, services or
         support activities included within the Business, excluding the Cleaning
         Business.

                  Cleaning Business - The Cleaning Business shall include, but
         is not limited to, any one or more of the following activities: (1)
         performance of onshore and/or offshore cleaning of tanks, barges,
         vessels, containers or other similar structures used in the storage
         and/or transportation of NOW; (2) the lease, rental or sale of labor
         and/or equipment involved in cleaning. USL shall be free to engage in
         any aspect of the Cleaning Business inside and/or outside the
         Territory. The Cleaning Business does not include the Collection or
         Disposal of NOW (including Washwater), the remediation and closure of
         oilfield waste pits and related loading and hauling.

                  Collection - The collection, transfer or transportation of
         NOW.

                  Competitor - Any Person that, directly or indirectly, engages
         in any aspect of the Business within any portion of the Territory.

                  Disposal - The treatment or disposal of NOW.

                  Effective Date - September 16, 1998.

                  Excluded NOW - NOW that is generated and collected on land and
         is delivered to the Landfarms from the site where it was generated
         entirely by on-land transportation.

                  Landfarm - The NOW disposal facility owned and operated by USL
         designated as Bateman Island, Louisiana (DNR Permit #91-10 OWD) (the
         "Bateman Island Landfarm"), Bourg, Louisiana (DNR Permit #90-10 OWD)
         (the "Bourg Landfarm"), Elm Grove, Louisiana (DNR Permit #OWD 89-1)
         (the "Elm Grove Landfarm"), and Mermentau, Louisiana (DNR Permit #SWD
         83-6) (the "Mermentau Landfarm").

                  NOW - Nonhazardous oilfield waste (including Washwater)
         associated with the exploration and production of oil, gas and
         geothermal energy, that contains less than 30 picocuries per gram of
         Radium 226 or 228, and all waste that is classified as "E&P Waste" by
         the Louisiana Department of Natural Resources.

                  Payment in Full and on Time - Payment or reimbursement made to
         USL on or before any date specified in the NOW Payment Agreement except
         and unless made in accordance with Section 13.6 of the NOW Payment
         Agreement.



                                       2

<PAGE>   3



                  Person or person - Any individual, a corporation, a
         partnership, an association, a trust or any other entity or
         organization, including a government or political subdivision or any
         agency or instrumentality thereof.

                  Territory - All or any part of the following: the States of
         Louisiana, Texas, Mississippi and Alabama and the Gulf of Mexico.

                  Washwater - Fluids generated by the cleaning and/or
         decontamination of tanks, barges, vessels, containers, or other similar
         structures used in the storage and/or transportation of NOW. Washwater
         may contain cleaning agents or emulsifiers, etc., in addition to the
         basic cleaning agent (water).

         2        Noncompetition. USL hereby agrees, for itself and on behalf of
its Affiliates, that, during the term of this Agreement, except as otherwise
permitted under this Agreement, neither it nor any of its Affiliates will,
within any part of the Territory, directly or indirectly, do any one or more of
the following: (a) engage in any aspect of the Business, except what is excluded
in Section 5 of this Agreement; (b) own any interest in any Competitor; (c)
operate, join, control or otherwise participate in any Competitor; or (d) lend
credit or money for the purpose of assisting another to establish or operate any
Competitor.

         3        Term. The term of this Agreement commences on the date hereof
and shall continue in force each month that Newpark makes to USL all Payments in
Full and on Time under the NOW Payment Agreement. Any breach and/or failure to
make Payment in Full and on Time under the NOW Payment Agreement shall
immediately terminate this Agreement. This Agreement shall automatically
terminate on June 30, 2001 if it has not been terminated sooner. Upon
termination of this Agreement, USL may (a) engage in any aspect of the Business,
(b) own any interest in any Competitor; (c) operate, join, control or otherwise
participate in any Competitor; and/or (d) lend credit or money for the purpose
of assisting another to establish or operate any Competitor.

         4        Maintenance of Confidentiality. For the term of this 
Agreement, USL and its Affiliates shall keep secret and retain in strictest
confidence, except for disclosure to any of its Affiliates, and will not permit
any Person other than its Affiliates to exercise the right, on a nonexclusive
basis, to use all patents, patent applications, copyrights, trademark
registrations and applications therefor, inventions, trade secrets, technical
know-how, special processes, and similar intangibles, parts lists, designs,
specifications, drawings, bills of material, maintenance manuals, warranty
service data and sales literature (collectively, "Intangible Assets") related to
the Business, which Newpark has been granted the right to use, along with USL
and its Affiliates.

         5        Permitted Activities. Section 2 of this Agreement 
notwithstanding:

                  a. USL and its Affiliates, as passive investors, may own up to
5% (including ownership by USL and all of its Affiliates) of the equity
securities of any Person (other than Newpark) whose equity securities are
publicly traded. In addition, in connection with their business described in
subparagraph (b) below, USL and its Affiliates shall be permitted from time to




                                       3

<PAGE>   4


time to acquire interests representing more than 5% of the equity securities of
Persons that derive less than 10% of their revenues from activities that cause
such Persons to be Competitors, provided that USL or its Affiliates or the
Persons who engage in such competitive activities immediately formulate plans to
dispose of those aspects of such businesses that cause such Persons to be
Competitors and actually complete such dispositions within 90 days after such
interests are acquired by USL or one or more of its Affiliates.

                  b. Newpark recognizes and acknowledges that USL and its
Affiliates are in the business of the collection, treatment and disposal of
numerous varieties of wastes, including, without limitation, municipal solid
wastes, construction and demolition debris, industrial nonhazardous wastes and
special wastes, such as contaminated soil and sludges. Newpark agrees that this
Agreement relates only to the Collection and Disposal of NOW and the remediation
and closure of oilfield waste pits, including related loading and hauling, in
the Territory, and excludes the Cleaning Business. This Agreement is not
intended to limit or otherwise affect the business of USL except as expressly
set forth herein.

                  c. Newpark further recognizes and acknowledges that USL and
its Affiliates from time to time enter into joint venture arrangements with
independent (i.e., non-Affiliate) third parties ("Joint Venture Partners") who
engage in aspects of the Business in the Territory. Without limiting the
applicability of this Agreement to USL and its Affiliates and such joint
ventures, Newpark agrees that the terms of this Agreement shall not apply to
Joint Venture Partners solely as a result of their entering into joint venture
arrangements with USL and its Affiliates with respect to the continuation of
activities in which such Joint Venture Partners were engaged immediately prior
to entering into such joint venture arrangements.

                  d. USL and its Affiliates may market, deal in, solicit orders
for and conduct other activity related to: (i) Disposal and Collection at any of
the Landfarms of Excluded NOW; (ii) Collection of NOW within a 200-mile radius
of USL?s Zapata, Texas, facility and Disposal of NOW so Collected at such
facility; (iii) Disposal and Collection of NOW contemplated under the NOW
Payment Agreement dated as of September 16, 1998, by and among USL and Newpark
Environmental Services, Inc.; (iv) Disposal and Collection of NOW at USL?s
facility in Lacassine, Louisiana; and (v) the Cleaning Business.

                  e. USL shall be free to engage in any aspect of the Cleaning
Business.

         6        Severability. USL acknowledges that it has carefully read and
considered the provisions of this Agreement and, having done so, agrees that the
restrictions set forth herein (including, but not limited to, the time periods
of restriction and the geographical areas of restriction) are fair and
reasonable and are reasonably required to protect the interests of Newpark and
its stockholders. In the event that, notwithstanding the foregoing, any of the
provisions of this Agreement shall be held to be invalid or unenforceable, the
remaining provisions hereof shall nevertheless continue to be valid and
enforceable, as though the invalid or unenforceable parts had not been included
herein. In the event that any provision of this Agreement relating to time
periods or areas of restriction, or both, shall be declared by a court of
competent jurisdiction to exceed the 



                                       4

<PAGE>   5


maximum time periods or areas (or both) that such court deems reasonable and
enforceable, said time periods or areas of restriction or both shall be deemed
to become and thereafter shall be the maximum time periods and areas which such
court deems reasonable and enforceable.

         7        Entire Agreement. This Agreement, together with the Release,
the NOW Payment Agreement, and Purchase Agreement and the other agreements
specifically mentioned therein, constitutes the entire agreement of USL and
Newpark with respect to the subject matter hereof and supersedes all prior and
contemporaneous oral agreements, understandings, negotiations and discussions of
the parties. No supplement, modification or waiver of this Agreement shall be
binding unless executed in writing by the party to be bound thereby. No waiver
of any of the provisions of this Agreement shall be deemed or shall constitute a
waiver of any other provision hereof (whether or not similar), nor shall such
waiver constitute a continuing waiver unless otherwise expressly provided. Any
failure to insist on strict compliance with any of the terms and conditions of
this Agreement shall not be deemed a waiver of any such terms or conditions.

         8        Nature of Obligations. All covenants and obligations of USL
hereunder shall be binding on USL, its Affiliates and the assigns, successors
and legal representatives of each of them, and shall inure to the benefit of
Newpark and all of its Affiliates that engage in any aspect of the Business in
any part of the Territory.

         9        Notices. Any and all notices, demands, requests or other
communications hereunder shall be in writing and shall be deemed duly given when
personally delivered to or transmitted by overnight express delivery or by
facsimile to and received by the party to whom such notice is intended, or in
lieu of such personal delivery or overnight express delivery or facsimile
transmission, 48 hours after deposit in the United States mail, first-class,
certified or registered, postage prepaid, return receipt requested, addressed to
the applicable party at the address provided below. The parties may change their
respective addresses for the purpose of this Section 9 by giving notice of such
change to the other party in the manner which is provided in this Section 9.

USL:                                U.S. Liquids, Inc.
                                    411 N. Sam Houston Parkway East
                                    Houston, TX  77060
                                    Attention: W. Greg Orr, President
                                    Facsimile No.: (281) 272-4545

                                    With a copy to:

                                    Baker & Botts, L.L.P.
                                    One Shell Plaza
                                    910 Louisiana
                                    Houston, TX 77002-4995
                                    Attention: Philip J. John, Esq.
                                    Facsimile No.: (713) 229-1522


                                       5

<PAGE>   6

Newpark:                            Newpark Resources, Inc.
                                    Newpark Environmental Services, Inc.
                                    3850 North Causeway, Suite 1770
                                    Metairie, LA 70002
                                    Attention:  James D. Cole, President
                                    Facsimile No.:  (504) 833-9506

                                    With a copy to:

                                    Ervin, Cohen & Jessup, L.L.P.
                                    9401 Wilshire Boulevard
                                    Beverly Hills, CA  90212
                                    Attention:  Bertram K. Massing, Esq.
                                    Facsimile No.:  (310) 859-2325

         10       Injunctive Relief. USL hereby stipulates and agrees that any
breach by it or by any of its Affiliates of this Agreement cannot be reasonably
or adequately compensated by damages in an action at law and that, in the event
of such breach, Newpark shall be entitled to injunctive relief, which may
include, but shall not be limited to, restraining USL and its Affiliates from
engaging in any activity that would constitute a breach of this Agreement.

         11       Option in Case of Breach. If USL breaches this Noncompetition
Agreement dated September 16, 1998, by engaging in Business as that term is
defined herein after the Effective Date, USL must pay to Newpark Environmental
Services, Inc. any and all revenues received from activities that constitute a
breach. Breach of this Noncompetition Agreement shall have no effect whatsoever
on Newpark Environmental Services, Inc.'s payment obligations under the NOW
Payment Agreement. USL shall use all reasonable commercial efforts to enforce
the Seller Noncompetition Agreement and the Buyuer Noncompetition Agreement,
both dated December 31, 1996 by and between Sanifill, Inc. and USL.

         12       Attorneys' Fees. In any litigation relating to this Agreement,
including litigation with respect to any supplement, modification or waiver of
this Agreement or any of its provisions, the prevailing party shall be entitled
to recover its costs and reasonable attorneys' fees.

         13       Law Governing. THIS AGREEMENT SHALL BE GOVERNED BY AND
CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF TEXAS.

         14       Venue of Lawsuit. Any suit relating to this agreement must be
filed in state court in Harris County, Texas.

         15       Captions. The captions in this Agreement are included for
convenience of reference only, do not constitute a part hereof and shall be
disregarded in the interpretation or construction hereof.




                                       6

<PAGE>   7





         ON THIS DATE, the Parties have executed multiple originals of this
Noncompetition Agreement.


                                           NEWPARK RESOURCES, INC.



Dated:                                     By:
      ------------------------------          ----------------------------------
                                           Name:
                                                --------------------------------
                                           Title:
                                                 -------------------------------


                                           U.S. LIQUIDS, INC.



Dated:                                     By:
      ------------------------------          ----------------------------------
                                           Name:
                                                --------------------------------
                                           Title:
                                                 -------------------------------

<PAGE>   1
                                                                   EXHIBIT 10.22


                             MISCELLANEOUS AGREEMENT

         THIS MISCELLANEOUS AGREEMENT (the "Agreement") is made and entered into
this 16th day of September, 1998 (the "Effective Date"), by and between Newpark
Resources, Inc., a Delaware corporation (herein, together with each of its
officers, directors, employees, agents, attorneys, representatives,
predecessors, successors, and assigns, and its direct and indirect corporate
parents, subsidiaries, partners, affiliates, and joint venturers, and all of
their respective officers, directors, employees, agents, attorneys,
representatives, predecessors, successors, and assigns, referred to as
"Newpark"), and U.S. Liquids, Inc., a Delaware corporation (herein, together
with each of its officers, directors, employees, agents, attorneys,
representatives, predecessors, successors, and assigns and its direct and
indirect corporate parents, subsidiaries, partners, affiliates, and joint
venturers and all of their respective officers, directors, employees, agents,
attorneys, representatives, predecessors, successors, and assigns, referred to
as "USL"), with reference to the following facts:

         A. On or about December 13, 1996, pursuant to Asset Purchase Agreement
dated December 2, 1996 (the "Sanifill Purchase Agreement"), by and among (i)
SANIFILL, INC., a Delaware corporation ("Sanifill"), CAMPBELL WELLS, L.P., a
Delaware limited partnership also known as CAMPBELL WELLS, LTD. ("Campbell") and
CAMPBELL WELLS NORM, L.P., a Delaware limited partnership ("Campbell Wells
NORM") (collectively "Sellers"), and (ii) USL, as "Buyer," USL assumed all
liabilities and obligations of Sanifill and Campbell under the contracts (the
"Contracts") listed on Schedule I attached to this Agreement, which are referred
to in this Agreement by the names with which they are identified on Schedule I.
Sanifill and Campbell were not relieved of any of their obligations to Newpark
under the Contracts and certain other agreements.

         B. Concurrently with the execution of this Agreement, Newpark and USL
are executing a Settlement of Arbitration and Release (the "Release"), a "NOW
Payment Agreement," a "Noncompetition Agreement," and an "Asset Purchase
Agreement" (collectively, the "New Deal Agreements"), which may affect the
continued existence of the Contracts.

         C. By this Agreement, the parties intend to clarify the continuing
status of the Contracts after the execution of the Release and the New Deal
Agreements.

         NOW THEREFORE, in consideration of the foregoing and of their mutual
covenants and agreements contained herein, the parties hereby agree as follows:

         1. Status of Disposal Agreement. Articles VI, VII, VIII, IX, X (other
than Section 10.2) and XII of the Disposal Agreement shall remain in full force
and effect in accordance with their terms solely with respect to events
occurring and circumstances existing before the Effective Date. All other
provisions of the Disposal Agreement are hereby terminated, except to the extent
that such terminated provisions are necessary to the interpretation of the
articles of the Disposal Agreement that remain in effect.




<PAGE>   2

         2. Status of Sanifill Noncompetition Agreement and Joinder Agreement.
As between Newpark and USL, the Sanifill Noncompetition Agreement between
Sanifill, Inc. and USL and the Joinder Agreement shall be superseded as of the
Effective Date by the Noncompetition Agreement dated September 16, 1998. As
regards Sellers and their Affiliates, the Sanifill Noncompetition Agreement and
the Joinder Agreement shall remain in full force and effect in accordance with
the terms of each.

         3. Guarantee of NOW Payment Agreement.

            3.1 Performance of NOW Payment Agreement. Newpark hereby covenants
and agrees that it shall cause Newpark Environmental Services, Inc. ("NESI") to
fully perform all of its obligations under the NOW Payment Agreement in a timely
manner. Newpark further covenants and agrees that it shall take all action,
including, without limitation, supplying information necessary for the
determination of quantities of NOW that may be delivered pursuant to the NOW
Payment Agreement, or shall refrain from taking any action, as is necessary or
appropriate, to permit NESI to fully perform all of its obligations under the
NOW Payment Agreement in a timely manner.

            3.2 Unconditional Guarantee. Newpark hereby unconditionally and
irrevocably guarantees the performance in full of all obligations of NESI under
the NOW Payment Agreement, with the same force and effect and to the same extent
as if Newpark were a party to the NOW Payment Agreement having the same rights
and obligations thereunder as NESI.

            3.3 No Set-Off; Guaranty of Performance or Payment Upon Demand.
Newpark shall perform any obligations or pay any amounts due in respect of the
obligations of NESI under the NOW Payment Agreement promptly upon demand by USL
or its Affiliates, without any set-off, defense or deduction for any claims or
counterclaims of any kind, except for any such set-offs, defenses, or deductions
that Newpark could assert if it were a party to the NOW Payment Agreement having
the same rights and obligations thereunder as NESI.

            3.4 Waiver of Diligence, Etc. Newpark hereby waives diligence,
presentment, demand, protest and notice of any kind with respect to this
Guarantee, as well as any requirement that USL or its affiliates exhaust any
rights or take any action against NESI.

            3.5 Waiver of Suretyship Defenses. To the extent permitted by
applicable law, Newpark hereby waives any and all legal and equitable defenses
that arise by reason of Newpark's status as a surety for NESI, which defenses
would not be available to Newpark if it were a party to the NOW Payment
Agreement having the same rights and obligations thereunder as NESI.

            3.6 Status. This Section 3 shall remain in full force and effect to
the extent that the NOW Payment Agreement remains in full force and effect in
accordance with its terms and shall terminate when and to the extent that the
NOW Payment Agreement is terminated.






<PAGE>   3

            4. Status of Prior Guaranty. The Prior Guaranty shall remain in full
force and effect to the extent that the Disposal Agreement remains in full force
and effect in accordance with its terms and shall terminate as of the Effective
Date to the extent that the Disposal Agreement is terminated.

            5. Guarantee of Asset Purchase Agreement. Newpark hereby
unconditionally and irrevocably guarantees the performance in full of all
obligations of NESI under the Asset Purchase Agreement, with the same force and
effect and to the same extent as if Newpark were a party to the Asset Purchase
Agreement having the same rights and obligations thereunder as NESI. Newpark
hereby waives diligence, presentment, demand, protest and notice of any kind
with respect to this Guarantee, as well as any requirement that USL or its
affiliates exhaust any rights or take any action against NESI.

            6. Status of Lease and Subleases. The Lease and the Subleases
referred to in Schedule I of this Agreement shall remain in full force and
effect for three years beginning July 1, 1998, and then terminate on June 30,
2001. USL shall take all necessary and reasonable measures to ensure that the
Lease and Subleases remain in full force and effect until June 30, 2001.

            7. Other Agreements. All other agreements between or among Newpark
and Sellers, or any of them, whether or not assumed by USL, shall remain in full
force and effect in accordance with their terms. USL shall use commercially
reasonable efforts to enforce for the benefit of Newpark all relevant covenants,
including, but not limited to, noncompetition covenants, made by Sellers in
favor of USL under or in connection with the Sanifill Purchase Agreement.

            8. Effect on Sellers. Although Sellers are not party to this
Agreement, the parties intend that none of Sellers shall be relieved of any
obligations owed by them to Newpark by reason of the transactions which gave
rise to the Contracts, except to the extent that certain provisions of the
Disposal Agreement are prospectively terminated hereby.


<PAGE>   4



         ON THIS DATE, the Parties have executed multiple originals of this
Miscellaneous Agreement.


                                          NEWPARK RESOURCES, INC.



Dated:                                    By:
      ----------------------------        Name:
                                          Title:



                                          U.S. LIQUIDS, INC.



Dated:                                    By:
      ----------------------------        Name:
                                          Title:



<PAGE>   5



                                                                      Schedule I

                                List of Contracts

1.       NOW Disposal Agreement by and among Sanifill, Inc., a Delaware
         corporation, NOW Disposal Operating Co., a Delaware corporation and an
         indirect wholly-owned subsidiary of Sanifill, and Campbell Wells, Ltd.,
         a Delaware limited partnership, dated as of June 4, 1996, as assumed by
         Newpark Resources, Inc., by an Assumption and Guarantee Agreement dated
         August 12, 1996 (the "Disposal Agreement")

2.       Noncompetition Agreement by and between Sanifill, Inc., a Delaware
         corporation, and Newpark Resources, Inc., a Delaware corporation, dated
         as of August 12, 1996 (the "Sanifill Noncompetition Agreement")

3.       Joinder Agreement, dated as of August 12, 1996, by Campbell Wells,
         Ltd., a Delaware limited partnership, for the benefit of Newpark
         Resources, Inc., and its Affiliates (the "Joinder Agreement")

4.       Assumption and Guarantee Agreement by and among Newpark Resources,
         Inc., a Delaware corporation, Sanifill, Inc., a Delaware corporation,
         and Campbell Wells, Ltd., a Delaware limited partnership, dated as of
         August 12, 1996 (the "Prior Guaranty")

5.       Lease and Access Agreement by and between Campbell Wells, Ltd., a
         Delaware limited partnership, and Newpark Resources, Inc. [no date]
         (the "Lease")

6.       Sublease and Access Agreement by and between Campbell Wells, Ltd., a
         Delaware limited partnership, and Newpark Resources, Inc. [no date]
         (the "First Sublease")

7.       Sublease and Access Agreement by and between Campbell Wells, Ltd. a
         Delaware limited partnership, and Newpark Resources, Inc. [no date]
         (the "Second Sublease," and, together with the First Sublease, the
         "Subleases")




<PAGE>   1
                                                                 EXHIBIT 10.23


                               OPERATING AGREEMENT
                                       OF
                            THE LOMA COMPANY, L.L.C.


         This Operating Agreement of The Loma Company, L.L.C. is hereby entered
into effective as of the ____ day of December, 1996, by and between:
         
         NEWPARK HOLDINGS, INC., a Louisiana corporation (hereinafter sometimes
         referred to as "Newpark"); and

         OLS CONSULTING SERVICES, INC., a Louisiana corporation (hereinafter
         referred to as "OLS").

         WHEREAS, OLS is the assignee of the entire right, title and interest of
Ores Paul Seaux in and to a certain new and useful invention as set forth in an
application for United States Letters Patent entitled "Mat System for
Construction of Roadways and Support Surfaces" accorded application serial No.
08/541,083 and filed on October 11, 1995 pursuant to an act of assignment dated
October 4, 1996;

         WHEREAS, OLS and Soloco, Inc. (now, by way of merger, Soloco, L.L.C.),
an affiliate of Newpark, have previously entered into that certain exclusive
licensing agreement made effective as of July 1, 1995, as amended on December
____, 1996 and as may be amended from time to time hereafter the "License
Agreement," relating to the production of certain property more fully described
hereinafter;

         WHEREAS, it is Newpark's objective to facilitate the financing of the
production of such property and assure itself a reliable source of production
thereof under the Licensing Agreement;

         WHEREAS, Newpark and OLS have contemporaneously herewith formed a
Louisiana Limited Liability Company and have agreed to enter into this Operating



<PAGE>   2

Agreement for the Company to set forth the terms and conditions of the
continuing relationship among the Members and the Company thereafter;

         NOW THEREFORE, for good and valuable consideration, the receipt and
sufficiency of which is hereby acknowledged, and in consideration of the
covenants and agreements set forth below, Newpark and OLS agree as follows,
pursuant to the provisions of the Louisiana Limited Liability Company Law,
LSA-R.S. 12:1301, et seq.
(the "Law"), and on the following terms and conditions:

1. Agreement. This Operating Agreement of the Company is hereby adopted by the
Members pursuant to the provisions of the Law upon the terms and conditions set
forth hereinafter (the "Agreement").

2. Name. The name of the Company is The Loma Company, L.L.C.

3. Members. The name and municipal address of each of the members (the
"Members") of the Company are as follows:

   Name                                   Municipal Address

   Newpark Holdings, Inc.                 Lakeway Center
                                          3850 N. Causeway
                                          Suite 1770
                                          Metairie, Louisiana   70002-1752
                                          ATTN:  Mr. James D. Cole

   OLS Consulting Services, Inc.          1126 Coolidge Boulevard
                                          Second Floor
                                          P.O. Box 52201
                                          Lafayette, Louisiana 70505
                                          ATTN: Mr. Paul Seaux

4. Principal Place of Business. The principal place of business of the Company
shall be located at 1126 Coolidge Boulevard, Second Floor, P.O. Box 52201,
Lafayette, Louisiana 70505, or such other location as selected from time to time
by the Executive Committee (as hereinafter defined).

5. Business and Purpose. The purpose or purposes for which the Company is
organized and the nature of the business to be carried on by it are stated and
declared to be as follows:

                                      -2-
<PAGE>   3



         To enter into any business lawful under the laws of the State of
Louisiana, either for its own account, or for the account of others, as agent,
and either as agent or principal, to enter into or engage in any kind of
business of any nature whatsoever, in which limited liability companies
organized under the Law may engage; and to the extent not prohibited thereby to
enter into and engage in any kind of business of any nature whatsoever in any
other state of the United States of America, any foreign nation, and any
territory of any country to the extent permitted by the laws of such other
state, nation or territory.

         To establish a manufacturing facility for the development, manufacture,
field trial and production of synthetic mats, including the construction and
operation of a suitable manufacturing facility for such mats (the "Project").

6. Term. The existence of the Company shall commence on the effective date of
this Agreement and shall terminate by the occurrence any of the following
events:

         (a) The sale or other disposition of the Project or all or
         substantially all of the property of the Company;

         (b) The execution of a written agreement of termination setting forth
         the effective date thereof by all of the Members;

         (c) The withdrawal, expulsion, bankruptcy or dissolution of a Member or
         the occurrence of any other event which terminates the continued
         membership of a Member in the Company unless, within 90 days after such
         event, all of the remaining Members agree in writing to continue the
         Company and, if membership is reduced to one, to the admission of one
         or more members;

7.       Capital Contributions.

         (a) Initial. The initial Members respectively have contributed the
         following amounts to the capital of the Company:

<TABLE>
<CAPTION>
                  Member                                  Amount
                  ------                                 -------  
<S>                                                      <C>    
                  OLS Consulting Services, Inc.          $ 51.00

                  Newpark Holdings, Inc.                 $ 49.00
</TABLE>

         (b) Secondary Contribution of Newpark. Subject to reimbursement of its
         acquisition cost thereof as set forth hereinbelow, Newpark will
         contribute certain immovable property more fully described on Exhibit
         "A" attached hereto, which is the property upon which the manufacturing
         facility of the Company is to be located (the "Property").
         Additionally, Newpark or its affiliates have advanced through August
         31, 1996 (inclusive of interest charges




                                      -3-
<PAGE>   4

         on such advances), the sum of $669,903.83 to the Company. Newpark will
         periodically make additional advances to the Company to fund certain
         engineering and other soft costs in connection with the development,
         manufacture and field trial of prototype mats and development costs
         preliminary to the construction and initial operation of the
         manufacturing facility for the mats up to a total amount of $640,000.00
         (any such additional amounts together with the amounts advanced by
         Newpark or its affiliates through August 31, 1995 shall be referred to
         cumulatively as the "Advances"). The Company will execute a note
         payable to Newpark equal to the amount of the Advances (the "Note").
         Subject to any additional restrictions or terms that may be imposed by
         Company's lender(s), the Note shall be repaid in 28 equal quarterly
         installments of principal plus accrued interest on the unpaid principal
         balance at the rate of eight percent (8%) per annum, said quarterly
         installments to commence on the last day of the sixth month following
         the commencement of production at the manufacturing facility
         contemplated by the Project. The Executive Committee shall also have
         the right from time to time to relax the terms for the repayment of the
         Note to the extent the Company's financial condition may require. The
         Note shall further be subordinated as may be necessary to facilitate
         the best possible structure of the financing to be obtained for the
         hard costs of the Project as described below. Additionally, with the
         cooperation and assistance of the Company, Newpark will arrange
         suitable construction and permanent financing for the hard costs of the
         manufacturing facility (the "Project Financing"). Newpark will
         guarantee the Project Financing if required by the lender. Newpark's
         cost of acquiring the Property will be added to the Note if Newpark is
         not repaid in full for such cost from proceeds of the Project
         Financing.

         (c) Secondary Capital Contribution of OLS. OLS will contribute, assign
         and/or license to the Company its exclusive manufacturing rights
         relating to the manufacture of synthetic and wooden mats as reserved by
         OLS in the License Agreement together with OLS's rights, benefits and
         obligations under the License Agreement related to the manufacture of
         synthetic or wooden mats, including, specifically, but without
         limitation thereto, OLS's rights and obligations under Sections
         4.01(d), (f) and (g) and Sections 5.01, 5.02 and 5.03 of the License
         Agreement. OLS shall retain and not assign to the Company the ownership
         of the Patent Rights. In addition, OLS shall contribute, assign and/or
         license to the Company the exclusive manufacturing rights relating to
         any improvements to the Products including Products produced according
         to or embodying the Improvement Inventions and the Engineering Data.
         OLS shall retain the right to make, use and sell the components and raw
         materials of the Products for uses other than for the production of
         Products. All capitalized terms used in this Section 7(c) shall have
         the meaning ascribed to them in the License Agreement. The Members
         agree that the value of OLS's secondary contribution made herein is
         $669,301.05 (the "OLS Advance"). The Company will execute a note
         payable to OLS equal to the amount of the OLS Advance




                                      -4-
<PAGE>   5

         (the "Note"). Subject to any additional restrictions or terms that may
         be imposed by Company's lender(s), the Note shall be repaid in 28 equal
         quarterly installments of principal plus accrued interest on the unpaid
         principal balance at the rate of eight percent (8%) per annum, said
         quarterly installments to commence on the last day of the sixth month
         following the commencement of production at the manufacturing facility
         contemplated by the Project. The Executive Committee shall also have
         the right from time to time to relax the terms for the repayment of the
         Note to the extent the Company's financial condition may require. The
         Note shall further be subordinated as may be necessary to facilitate
         the best possible structure of the financing to be obtained for the
         hard costs of the Project as described below.

         (d) Limitation. No Member shall be required to make any contribution to
         the capital of the Company other than as set forth in (a), (b) and (c).

         (e) Provisions not for Benefit of Creditors. The provisions of this
         Paragraph 7 are not for the benefit of any creditor or other person
         other than a Member to whom any debts, liabilities or obligations are
         owed by, or otherwise has any claim against, the Company or any Member,
         and no creditor or other person shall obtain any rights under this
         Paragraph or by reason of this Paragraph, or shall be able to make any
         claim in respect of any debts, liabilities, or obligations against the
         Company or any Member.

         (f) Property. All Company property shall be held in the name of the
         Company.

8.       Management.

         (a) Executive Committee. As more fully described in Paragraph 8(c)
         hereof, the policy of the Company will be directed and its operations
         reviewed by an Executive Committee (the "Executive Committee")
         comprised of four Directors. Except as provided in Paragraph 8(c)
         hereof, no Member of the Company will have the right to bind the
         Company or to incur any obligation on behalf of the Company unless
         otherwise approved by a majority of the Executive Committee. Newpark
         will appoint two Directors to the Executive Committee and OLS will
         appoint two Directors to the Executive Committee. In the event of a
         payment default in any financing agreement between the Company and any
         third party lender, which payment default shall specifically include a
         demand by such third party lender upon Newpark or its affiliate(s) to
         pay all or any portion of such third party indebtedness (whether
         pursuant to a guaranty agreement or otherwise) and such payment default
         is not timely cured by Company and prompts an acceleration of the
         repayment of the indebtedness by such third party lender or an election
         by such third party lender to exercise any of its remedies upon
         default, including demand for payment upon Newpark or its affiliate(s)
         (except where such event of default has been precipitated by a




                                      -5-
<PAGE>   6

         breach of Newpark or any of its affiliates under this Agreement or the
         Exclusive License Agreement), then, at Newpark's option, one of OLS's
         Directors will resign and the Executive Committee thereafter will be
         composed of three Directors, two of which are appointed by Newpark and
         one of which is appointed by OLS. If the two OLS Directors cannot agree
         on which Director among the two shall resign, Newpark shall select the
         OLS Director to resign. In the event or at such time the default is
         waived or subsequently cured and providing that Newpark or its
         affiliate is not required to advance any funds or incur any additional
         liability to such lender(s), OLS shall have the right to reinstate its
         resigning director to the Executive Committee.

         (b) Authority of the Executive Committee. The following matters shall
         be reserved to the Executive Committee:

                  (i) Final approval of the annual compensation, bonuses or
         other benefits to be paid to any managerial level employee of the
         Company, including any manager who is also a Member of the Company;

                  (ii) Final approval of the missions and goals of the Company,
         as the same my be modified from time to time, including, without
         limitation, final approval of the Company's annual operating plan as
         submitted by the Chief Executive Officer;

                  (iii) The approval of the public accounting firm(s) engaged by
         the Company to audit the financial affairs and records of the Company;

                  (iv) Any contract, except contracts between the Company and
         Soloco L.L.C., whose aggregate value to the Company is expected to
         exceed $500,000.00;

                  (v) The purchase, sale or lease of any immovable property by
         the Company;

                  (vi) Any guarantee by the Company of the debt or obligations
         of any other person or entity;

                  (vii) The approval of any proposed capital expenditure for the
         Company in excess of $25,000;

                  (viii) Any borrowings or loans made to or by the Company
         except regularly anticipated draws against a pre-approved revolving
         line of credit;

                  (ix) The sale or lease of all or any portion of the assets of
         the Company, except where such sale is in the ordinary course of
         Company's business or due to obsolescence or ordinary wear and tear;
         and




                                      -6-
<PAGE>   7

                  (x) Any distributions made to the Members out of the Net
         Operating Cash Flow of the Company.

         (c) Chief Executive Officer. Paul Seaux shall be the Chief Executive
         Officer ("CEO") of the Company and, as such, shall have the authority
         and function delegated to him by the Executive Committee as set forth
         in Paragraph 8(d) hereof.

         (d) Authority of the CEO. The CEO shall have exclusive authority to
         manage the operations and affairs of the Company and to make all
         decisions regarding the business of the Company, subject only to those
         matters which are reserved for the vote of the Executive Committee or
         the Members by the terms of this Agreement (by the vote herein
         specified), or by the Law. It is understood and agreed that the CEO
         shall have all of the rights and powers of the Members as provided in
         the Law and as otherwise provided by law, and any action taken by the
         CEO in accordance with this Paragraph 8 shall constitute the act of,
         and serve to bind the Company and its Members. In furtherance of the
         foregoing, the CEO shall have all right, power and authority necessary,
         appropriate, desirable or incidental to carry out the conduct of the
         Company's business, including, but not limited to, the right, power and
         authority: (i) to incur and pay all costs, expenses and expenditures
         (including the timely payment of all taxes)incurred in good faith in
         the course of the conduct of the Company business; (ii) to execute
         promissory note(s), loan agreement(s), mortgage(s), security
         agreement(s) and other financing related documents reasonably necessary
         to finance the operation of the Company's business by causing it to
         borrow funds upon such terms and conditions as previously approved by
         the Executive Committee and to take any and all actions and to execute,
         acknowledge and deliver all documents in connection therewith; provided
         however that the CEO shall have no right or power to create or impose
         personal liability on any Member for any of the Company's obligations
         without the express consent of such Member, except as may otherwise be
         provided herein; (iii) to employ and dismiss from employment any and
         all employees, agents, independent contractors, consultants,
         appraisers, attorneys and accountants, and to pay such fees, expenses,
         salaries, wages or other compensation to such persons, as the CEO
         determines to be reasonable; (iv) to acquire, purchase or contract to
         purchase, sell or contract to sell, or to lease or hire any personal or
         movable property; (v) to pay, extend, renew, modify, submit to
         arbitration, prosecute, defend or compromise, upon such terms as the
         CEO deems proper and upon any evidence as it may deem sufficient, any
         obligation, suit, liability, cause of action or claim, in favor of or
         against the Company; (vi) to pay or cause to be paid any and all taxes,
         charges or assessments that may be levied, assessed or imposed on any
         property or assets of the Company; and (vii) to invest funds which, in
         the judgment of the CEO, are not immediately required for the conduct
         of the Company's business, in government-backed securities,




                                      -7-
<PAGE>   8

         money market accounts or other prudent short-term investments generally
         recognized as being free of risk.

         (e) Certificates. In accordance with La. R.S. 12:1305(C)(5) the
         Executive Committee shall have the power and authority to execute from
         time to time a certificate to establish the membership of any Member,
         the authenticity of any records of the Company or the authority of any
         person to act on behalf of the Company including, but not limited to
         the authority to take the actions referred to in La. R.S.
         12:1318(B).

         (f) Management Stalemate, Mediation, Buy-Sell. All actions reserved to
         the Executive Committee shall be taken by a majority of the members of
         the Executive Committee. If the Executive Committee, after a diligent
         and good faith effort, is unable to resolve a matter reserved to the
         Executive Committee and at least two members of the Executive Committee
         declare in writing that such stalemate has a materially adverse effect
         on the effective management of the Company, the Members shall first
         endeavor to settle the dispute in an amicable manner by mediation
         administered by the American Arbitration Association, under its
         mediation rules. Unless otherwise agreed upon, the mediation shall be
         conducted in Lafayette, Louisiana by a panel of three (3) mediators,
         one appointed by each of the Members and one appointed by the two
         mediators so appointed.

                  If the Members are unable to resolve the stalemate of the
         Executive Committee through non-binding mediation, then one Member
         shall purchase the entire interest of the other Member in the Company
         through the following procedures. Immediately prior to the conclusion
         of the mediation, the mediators, by the flip of a coin, shall designate
         one of the Members as the defaulting party. The defaulting Member shall
         then have a period of up to one hundred eighty (180) days from the date
         of the mediators' designation of the defaulting Member to make an offer
         to purchase the entire interest of the other Member upon such price and
         upon such terms as selected by the defaulting Member. Such offer shall
         be in writing and shall be sent by certified mail to the address of the
         other Member provided for notices hereunder. Thereafter, the other
         Member shall have a period of one hundred eighty (180) days from the
         receipt of such offer within which to either sell its entire interest
         to the defaulting Member for the price and upon the terms and
         conditions as set forth in the offer, or to purchase the interest of
         the defaulting Member for the price and upon the terms and conditions
         as set forth in the offer. If the defaulting Member fails to make an
         offer to purchase the entire interest of the other Member within the
         one hundred eighty (180) day period from the conclusion of the
         mediation, then such Member must sell its entire interest in the
         Company to the other Member for a price equal to the fair market value
         of its interest in the Company as determined by an independent United
         States investment banking firm appointed by the mediators, upon terms
         of all cash to the selling



                                      -8-
<PAGE>   9

         Member. If neither Member purchases the interest of the other and the
         stalemate continues to exist, the Company shall be dissolved in the
         manner provided by applicable law.

         (g) Manufacturing Facility. Except for those matters reserved to the
         Executive Committee, the CEO shall manage the operation of the
         manufacturing facility and all aspects of the manufacturing process.
         All aspects of the ongoing business of the Company shall be subject to
         the terms and conditions of the Exclusive Licensing Agreement, a copy
         of which is attached as Exhibit "B" hereto.

         (h) Indemnification. The Company shall indemnify, hold harmless and
         defend any person who was or is a party or is threatened to be made a
         party of any threatened, pending or completed action, suit or
         proceeding, whether civil, criminal, administrative or investigative,
         (other than an action by or in the right of the Company) by reason of
         the fact that such person is or was the CEO or a member of the
         Executive Committee of the Company, against expenses (including
         attorney's fees), judgments, fines and amounts paid in settlement
         actually and reasonably incurred by such person in connection with such
         action, suit, and/or proceeding. The termination of any action, suit or
         proceeding by judgment, order, settlement or conviction will not, of
         itself, create a presumption that the person did not act in good faith
         and in a manner which such person reasonably believed to be in or not
         opposed to the best interests of the Company, and, with respect to any
         criminal action or proceeding, that such person had reasonable cause to
         believe that his or her conduct was unlawful. Expenses incurred by the
         CEO or a Director in defending a civil or criminal action, suit or
         proceeding may be paid by the Company in advance of the final
         disposition of such action, suit or proceeding upon receipt of an
         undertaking by or on behalf of such CEO or Director to repay such
         amount if it is ultimately determined that such person is not entitled
         to be indemnified by the Company. Such expenses incurred by other
         personnel, employees and agents of the Company may be so paid upon such
         terms and conditions if any, as the CEO or Director deems appropriate.

         (i) Member Liability. Except as expressly provided under the Law, no
         Member shall have personal liability for the losses, debts, claims,
         expenses or encumbrances of or against the Company or its Property, nor
         shall any Member be obligated to restore a deficit balance, if any, in
         the Members Capital Account (as hereinafter defined).

         (j) Authority to Engage in Other Activities. Except as provided herein,
         no Member shall be required to manage the Company as his or its sole
         and exclusive function, and a Member may have other business interests
         and may engage in other activities in addition to those relating to the
         Company. The Members acknowledge that certain of the Members' other
         activities and




                                      -9-
<PAGE>   10

         business interests may consist of the ownership, development,
         marketing, sale, operation or management of facilities or real
         properties or entities that compete with the business of the Company.
         Except as provided herein or in any Exhibit hereto, neither the Company
         nor any Member shall have any right in or to such other ventures by
         virtue of this Agreement or the relationship among the Members created
         hereby.

9.       Profits and Losses.

         (a) Determination, Allocation. The profits and losses of the Company
         shall be determined under accounting principals consistently applied
         and the method of accounting used in maintaining the Company's books
         and records, as hereinafter set forth. Except as specifically provided
         herein, the annual net profits and losses (and all items of income,
         deduction and credit) of the Company shall be allocated among the
         Members in accordance with their Membership Percentage Interests, which
         shall be as follows:

<TABLE>
<CAPTION>
                                                   Membership
                  Member                           Percentage Interest
                  ------                           -------------------  
<S>                                                <C>  
                  Newpark                                49.0%

                  OLS                                    51.0%

                  TOTAL                                 100.0%
</TABLE>

         (b) Allocations to Reflect Contributed Property and Capital Account
         Revaluations. In accordance with Section 704(c) of the Internal Revenue
         Code of 1986, as amended (the "Code") and the Treasury Regulations
         issued thereunder (the "Regulations"), taxable income, gain, loss and
         deduction with respect to any property contributed to the capital of
         the Company shall, solely for Federal income tax purposes, be allocated
         among the Members so as to take into account any variation between the
         adjusted basis of such property for Federal income tax purposes and its
         fair market value, as recorded on the books of the Company. As provided
         in Section 1.704-1(b)(2)(iv)(f) of the Regulations, in the event that
         the Capital Accounts of the Members are adjusted to reflect the
         revaluation of Company property on the Company's books, then subsequent
         allocation of taxable income, gain, loss and deduction with respect to
         such property shall take into account any variation between the
         adjusted basis of such property for Federal income tax purposes and its
         adjusted fair market value, as recorded on the Company's books.
         Allocations under this Paragraph shall be made in accordance with
         Section 1.704-1(b)(4)(i) of the Regulations and, consequently, shall
         not be reflected in the Members' Capital Accounts.



                                      -10-
<PAGE>   11

         (c) Varying Partnership Interests During Accounting Year. In the event
         there is a change in any Member's Membership Percentage Interest in the
         Company during an accounting year, net profits and net losses shall be
         appropriately allocated among the Members to take into account the
         varying interests of the Members so as to comply with Section 706(d) of
         the Code.

         (d) Regulatory Allocations. Notwithstanding any other provision in this
         Paragraph 9 to the contrary, in order to comply with the rules set
         forth in the Regulations for (i) allocations of income, gain, loss and
         deductions attributable to nonrecourse liabilities, and (ii)
         partnership allocations where partners are not liable to restore
         deficit capital accounts, the following rules shall apply:

                  (1) "Partner nonrecourse deductions" as described and defined
                  in Section 1.704-2(i)(1) and (2) of the Regulations
                  attributable to a particular "partner nonrecourse liability"
                  (as defined in Section 1.704-2(b)(4)) shall be allocated among
                  the Members in the ratio in which the Members bear the
                  economic risk of loss with respect to such liability;

                  (2) Items of Company gross income and gain shall be allocated
                  among the Members to the extent necessary to comply with the
                  minimum gain chargeback rules for nonrecourse liabilities set
                  forth in Sections 1.704-2(f) and 1.704-2(i)(4) of the
                  Regulations; and

                  (3) Items of Company gross income and gain shall be allocated
                  among the Members to the extent necessary to comply with the
                  qualified income offset provisions set forth in Section
                  1.704-1(b)(2)(ii)(d) of the Regulations, relating to
                  unexpected deficit capital account balances (after taking into
                  account (i) all capital account adjustments prescribed in
                  Section 1.704-1(b)(2)(ii)(d) of the Regulations and (ii) each
                  Member's share, if any, of the Company's partnership minimum
                  gain and partner nonrecourse minimum gain and partner
                  nonrecourse minimum gain as provided in Sections 1.704-2(g)(1)
                  and 1.704-2(i)(5) of the Regulations.

                  Since the allocations set forth in this Paragraph 9(d) (the
                  "Regulatory Allocations") may effect results not consistent
                  with the manner in which the Members intend to divide Company
                  distributions, the Executive Committee is authorized to divide
                  other allocations of net profits, net losses, and other items
                  among the Members so as to prevent the Regulatory Allocations
                  from distorting the manner in which distributions would be
                  divided among the Members but for application of the
                  Regulatory Allocations. The Executive Committee shall have
                  discretion to accomplish this result in any reasonable manner
                  that is consistent with Section 704 of the Code and the
                  related Regulations. The Members may agree, by unanimous
                  written consent, to make any election permitted by the
                  Regulations under Section 704 of the Code that may 



                                      -11-
<PAGE>   12

         reduce or eliminate any Regulatory Allocation that would otherwise be
         required.

         (e) Tax Conformity; Reliance on Attorneys or Accountants. The
         determination of each Member's share of each item of income, gain,
         loss, deduction or credit of the Company for any period or fiscal year
         shall, for purposes of Sections 702 and 704 of the code, be made in
         accordance with the allocations set forth in this Paragraph 9. The
         Executive Committee shall have no liability to the Members or the
         Company if the Executive Committee relies upon the written opinion of
         tax counsel or accountants retained by the Company with respect to all
         matters (including disputes) relating to computations and
         determinations required to be made under this Paragraph or other
         provisions of this Agreement.

10.      Distributions.

         (a) Net Operating Cash Flow. "Net Operating Cash Flow" means the gross
         cash proceeds from Company operations, less the portion thereof used to
         pay or establish reserves for all Company expenses, debt payments,
         capital improvements, replacements, and contingencies, all as
         determined by the Executive Committee. "Net Operating Cash Flow" shall
         not be reduced by depreciation, amortization, cost recovery deductions,
         or similar allowances, and shall be increased by any reductions of
         reserves previously established.

         (b) Distribution. The distribution policy of the Company will be
         established by the Executive Committee taking into account (i) the
         requirements of the Law; (ii) the terms and conditions of the Project
         Financing; and (iii) the capital and operating needs of the Company. In
         making distributions of Net Operating Cash Flow, the Executive
         Committee shall take into account the following priority: first, excess
         Net Operating Cash Flow shall be reinvested to the extent required for
         appropriate expansions of the business including working capital needs
         in connection therewith; second, as necessary, repayments shall be made
         under the Company's credit arrangements so as to minimize the cost of
         the Company's financing; third, distributions will be made to the
         Members. Any distributions of Net Operating Cash Flow shall be made
         forty-nine (49%) percent to Newpark and fifty-one (51%) percent to OLS
         in accordance with their individual interest set forth in Section 9(a)
         hereof. Provided sufficient Net Operating Cash Flow is available, the
         Executive Committee shall authorize the distribution of sufficient cash
         to cover each Member's federal and state income tax liability for
         reported income.

11.      Financial Matters. To the extent that capital in addition to the 
Advances or the Project Financing is needed to operate the Company or fund
certain maintenance or expansion of the Project, the Company will raise such
funds according to the following priorities; first, the Company will seek to
borrow such funds from third parties;




                                      -12-
<PAGE>   13

second, the Members may loan such funds to the Company upon terms and conditions
similar to those of the Advances; and third, equity contributions may be made by
each of the Members on a pro-rata basis in accordance with the Members'
Membership Percentage Interests in the Company; provided, however, that no such
contributions will be required unless the unanimous agreement of each of the
Members to make such an equity contribution is first obtained.

12.      Annual Reports and Tax Information. Within a reasonable time after the
close of each Company accounting year, the Company shall furnish to each Member
an annual report containing a balance sheet as of the close of such accounting
year, statements of income, Members' Capital Accounts and cash flow and
necessary tax information. If the Company's accounting year is the calendar
year, such reports shall be made within sixty (60) days of the close of the
accounting year.

13.      Tax Matters Member and Tax Elections. OLS Consulting Services, Inc. is
designated the "tax matters partner" as defined in Internal Revenue Code Section
6231(a)(7) and shall perform all duties imposed thereon under Code Sections 6221
through 6232. Except as specifically provided herein, said Member is further
authorized, in its sole discretion, to make or revoke any Company tax election
as provided for in the Internal Revenue Code; provided, however, that said
Member shall make, on behalf of the Company, the election referred to in Section
754 of the Internal Revenue Code, if so requested by the Members. The Members
intend that the Company be classified, for Federal income tax purposes, as a
partnership, and agree in advance to any amendment which a tax advisor selected
by the Executive Committee shall recommend to be necessary or advisable to
qualify for or maintain such tax classification. Further, the Members authorize
the filing (or the forbearance of filing) of any election under any Regulation
or Internal Revenue Service rulings or procedures to effect the classification
of the Company as a partnership for Federal income tax purposes.

14.      Books and Records. The Company shall at all times keep and maintain a
true and accurate set of books and records at the Company's principal place of
business and in accordance with accounting principals consistently applied and
the provisions of this Operating Agreement. The Company shall cause its books
and records to be audited by a recognized public accounting firm approved by the
Members. The Company shall allow its Members and their authorized
representatives to inspect, during normal business hours, the books and
accounting records of the Company, to make extracts and copies therefrom at
their own expense, and to have full access of all of the Property and assets of
the Company. Additionally, the Company shall supply to the Members of the
Company any financial information they may from time to time reasonably require.

15.      Accounting Year and Method. For purposes of maintaining the Company's
books and records, the Company's accounting year shall be the calendar year, and
the Company shall employ the cash method of accounting for tax purposes and the
accrual method of accounting for book purposes, provided, however, that the
Company shall use a fiscal year and/or employ the accrual




                                      -13-
<PAGE>   14

method of accounting for tax purposes, if, and only if, the Company is required
to report its federal income tax on such basis.

16.      Book Carrying Value of Assets. The Company's assets shall be carried on
the Company's books and records at each asset's "Book Carrying Value," which
shall mean the asset's adjusted basis for Federal income tax purposes, except as
follows:

         (a) The initial Book Carrying Value of any asset contributed by a
         Member to the Company shall be such asset's fair market value, as
         agreed to by the contributing Member and the Company.

         (b) The Book Carrying Value of all Company assets (including assets
         distributed in accordance with (ii) below) shall be adjusted to reflect
         their then current fair market value, as determined by the Members,
         upon the happening of any of the following events:

                  (i) Contributions to the Company, other than pro-rata
                  contributions by the then current Members,

                  (ii) Distributions to the Members of property other than money
                  or pro-rata distributions of undivided interests in the
                  distributed property, or

                  (iii) Termination of the Company as a partnership for federal
                  income tax purposes pursuant to Section 708(b)(1)(B) of the
                  Internal Revenue Code.

17.      Capital Accounts.

         (a) Individual capital accounts ("Capital Accounts") shall be
         maintained for each Member and shall consist of such Member's initial
         capital contribution to the Company, if any, increased by (i) any
         additional capital contributions to the Company by such Member and (ii)
         such Member's distributive share of Company profits, and decreased by
         (x) distributions to such Member pursuant to this Agreement and (y)
         such Member's distributive share of Company losses.

         (b) If the Book Carrying Value of Company assets is adjusted pursuant
         to Paragraph 16(b) hereof, the Capital Accounts of all Members shall be
         simultaneously adjusted to reflect the aggregate net adjustments to
         said Book Carrying Value of Company assets as if the Company recognized
         a profit or loss equal to the amount of such aggregate net adjustment.

         (c) The transferee of any interest in the Company transferred in
         accordance with the provisions of this Agreement shall succeed to the
         Capital Account of the transferor to the extent that it relates to the
         transferred interest.



                                      -14-
<PAGE>   15

         (d) No Member shall be entitled to interest on the balance in such
         Member's Capital Account nor shall any Member be entitled to a
         distribution with respect to such Member's Capital Account except as
         specifically provided in this Agreement.

18.      Prior Written Consent Required for the Sale of Membership Percentage
         Interests.

         (a) No Member may sell, transfer or otherwise dispose of all or any of
         its Membership Percentage Interest in the Company without either (i)
         obtaining the prior written consent of the other Members, which consent
         will not be unreasonably withheld, or (ii) in the case of a proposed
         sale, transfer or disposition by Newpark, complying with the provisions
         of Paragraph 18(b), and in the case of a proposed sale, transfer or
         disposition by OLS, complying with the provisions of Paragraph 18(c).
         Notwithstanding the foregoing, no written consent of the other Members
         or compliance with Paragraph 18(b) or Paragraph 18(c) will be required
         in the event of (x) an assignment or transfer of any Membership
         Percentage Interest in the Company from a Member to its parent
         corporation or to another directly or indirectly wholly-owned
         subsidiary or holding company of the Member or its parent company or to
         any affiliate or subsidiary of such holding company or (y) a collateral
         pledge of or grant of a security interest in a Membership Percentage
         Interest in the Company in order to secure indebtedness as provided in
         Paragraph 19. Any sale, transfer or other disposal of any Membership
         Percentage Interest in the Company (whether or not requiring the prior
         written consent of the other Members) will not be or become effective
         until the assignee or transferee has executed appropriate documentation
         in favor of the other Members and to the Company whereby such assignee
         or transferee agrees to be bound by the terms and conditions of this
         Agreement and any other third party contracts entered into by and
         between Members and by and between a Member or his or its affiliate and
         the Company, as provided in Paragraph 20.

         (b) Newpark Sale. As a condition to Newpark's right to sell, transfer
         or otherwise dispose of all or a portion of its Membership Percentage
         Interest in the Company (other than as permitted in Paragraph 18(a)),
         Newpark will first comply with the following conditions:

                  (i) Newpark will first inform OLS in writing (the "Newpark
                  Notice of Sale") of the price, terms and conditions upon which
                  it proposes to sell, transfer or otherwise dispose of its
                  entire Membership Percentage Interest in the Company, will
                  identify the prospective purchaser or transferee of such
                  Membership Percentage Interest, and will offer OLS the
                  opportunity to acquire Newpark's Membership Percentage
                  Interest in the Company upon the same price, terms and
                  conditions as set forth in




                                      -15-
<PAGE>   16

                  the Newpark Notice of Sale ("OLS ROFR Rights"). OLS will have
                  the preferential right to exercise OLS ROFR Rights as of the
                  date of the Newpark Notice of Sale.

                  (ii) It will be deemed that OLS ROFR Rights have been waived
                  if such rights have not been exercised in writing within
                  thirty (30) calendar days after receipt of the Newpark Notice
                  of Sale.

                  (iii) Newpark may, within a period of six (6) months after OLS
                  ROFR Rights have been refused or waived by OLS, sell, transfer
                  or otherwise dispose of such Membership Percentage Interest in
                  the Company to the prospective purchaser or transferee
                  previously identified in the Newpark Notice of Sale, but not
                  at a price less than nor upon terms and conditions more
                  favorable to the purchaser or transferee than the price, terms
                  and conditions first offered to OLS.

                  (iv) If no such transaction of Newpark's Membership Percentage
                  Interest in the Company is consummated by Newpark within the
                  same period of six (6) months, Newpark will not thereafter
                  make any sale, transfer or other disposal without again
                  offering the same to OLS in accordance with the provisions of
                  this Paragraph 18(b).

         (c) OLS Sale. As a condition to OLS's right to sell, transfer or
         otherwise dispose of all or a portion of its Membership Percentage
         Interest in the Company (other than as permitted in Paragraph 18(a)),
         OLS will first comply with the following conditions:

                  (i) OLS will first inform Newpark in writing ("OLS Notice of
                  Sale") of the price, terms and conditions upon which it
                  proposes to sell, transfer or otherwise dispose of its entire
                  Membership Percentage Interest in the Company, will identify
                  the prospective purchaser or transferee of such Membership
                  Percentage Interest, and will offer Newpark the opportunity to
                  acquire OLS's Membership Percentage Interest in the Company
                  upon the same price, terms and conditions as set forth in OLS
                  Notice of Sale (the "Newpark ROFR Rights"). Newpark will have
                  the preferential right to exercise its Newpark ROFR Rights as
                  of the date of OLS Notice of Sale.

                  (ii) It will be deemed that the Newpark ROFR Rights have been
                  waived if such rights have not been exercised in writing
                  within thirty (30) calendar days after receipt of OLS Notice
                  of Sale.

                  (iii) OLS may, within a period of six (6) months after the
                  Newpark ROFR Rights have been refused or waived by Newpark,
                  sell, transfer or


                                      -16-
<PAGE>   17



                  otherwise dispose of its entire Membership Percentage Interest
                  in the Company to the prospective purchaser or transferee
                  previously identified in OLS Notice of Sale, but not at a
                  price less than nor upon terms and conditions more favorable
                  to the purchaser or transferee than the price, terms and
                  conditions first offered to Newpark.

                  (iv) If no such transaction of OLS's Membership Percentage
                  Interest in the Company is consummated by OLS within the same
                  period of six (6) months, OLS will not thereafter make any
                  sale, transfer or other disposal without again offering the
                  same to Newpark in accordance with the provisions of this
                  Paragraph 18(c).

19. Transfers as Security. Any Member may transfer all or any part of its
interest in the Company by way of security, and the provisions of Paragraph 18
shall not apply so long as the Member remains the legal owner of the interest so
given as security. However, the interest cannot be transferred or sold to
satisfy the debt for which it was given as security without complying with the
provisions of Paragraph 18.

20. Status of Transferee. Any transfer (whether voluntary or involuntary) of an
interest in this Company in accordance with the provisions of the Agreement
(other than to another Member) shall convey to the transferee only the
transferor's right to share in distributions, profits and losses and capital
upon liquidation with respect to the interest transferred, shall not convey any
rights to vote on any Company matters or to participate in the management of the
Company and shall not diminish or in any way affect the liabilities and
obligations of the transferring Member under the Agreement, and the transferee
shall not become a Member in the Company unless and until:

                  (i) the transfer shall have been approved by all of the other
                  Members;

                  (ii) the transferee shall agree in writing to be bound by the
                  terms and conditions of this Agreement (as may be modified in
                  connection with the transfer) and any other third party
                  contracts entered into by and between the Members or by and
                  between the Members or any of his or its affiliates and the
                  Company; and

                  (iii) an instrument setting forth the fact of the transfer and
                  the new interests of the affected Member, is executed by all
                  of the Members including the transferee.

21.      Bankruptcy of a Member.

         (a) Except as otherwise provided herein, the bankruptcy of a Member
         shall terminate that Member's interest in the Company and the remaining
         Members shall have the right to purchase the interest of the
         withdrawing Member at a 




                                      -17-
<PAGE>   18

         price equal to the value of his interest in the Company as of the end
         of the month of his bankruptcy as hereinafter calculated.

         (b) Upon the termination of a Member's interest in the company as
         provided in subparagraph (a) hereof, Company Capital Accounts shall be
         posted as of the end of the month in which the terminating event
         occurred. The value of the bankrupt Member's interest in the Company
         shall be the sum of its Capital Account as posted and any debts due and
         owing to it by the Company less any amounts due and owing by him it the
         Company.

         (c) If the remaining Members exercise their right of purchase, they
         shall pay the purchase price of the interest of the Member terminating
         hereunder at the valuation determined under subparagraph (b) hereof, as
         follows:

                  (i) One/half within three months after the end of the month in
                  which the terminating event occurred, and

                  (ii) the balance within six months after the end of the month
                  in which the terminating event occurred.

         The remaining Members shall purchase the interest of the terminating
         Member in proportion to their respective Membership Percentage
         Interests; provided, however, that if one Member fails to pay its share
         of the purchase price, the remaining Member or Members may pay the
         balance and their respective Membership Percentage Interests shall be
         increased thereby.

         (d) The bankruptcy of a Member shall not terminate that Member's
         interest in the Company if the remaining Members unanimously agree to
         admit that Member's trustee in bankruptcy, successor, assign or other
         legal representative as a Member under the provisions of Paragraph 20
         hereof.

         (e) Following the bankruptcy of a Member, neither the Member, nor the
         Member's trustee in the bankruptcy, successor, assign or other legal
         representative shall have any further rights in connection with the
         management of the Company as provided in Paragraph 8 hereof, and none
         of such shall have any right to serve as a CEO, Director or other
         Manager of the Company or any right to appoint any person to any such
         position.

22.      Other Events of Termination of Interest of Member, Withdrawal of 
Member, Admission of New Members.

         (a) Upon any other event which terminates a Member's interest in the
         Company, other than bankruptcy of the Member, such as the withdrawal,
         expulsion or dissolution of a Member, and provided that the Company is
         continued pursuant to the terms of Paragraph 6 hereof, such Member
         shall be





                                      -18-
<PAGE>   19

         distributed, within six (6) months of the date of such Member's
         termination of membership in the Company, an amount, in cash, equal to
         the Member's capital account as of the end of the month in which the
         terminating event occurred, plus any debts due and owing to it by the
         Company, less any amounts due and owing by it to the Company.

         (b) No Member may voluntarily withdraw without the consent of all
         remaining Members and the Members.

         (c) A new Member or Members may be admitted with the consent of all
         Members and such admission may be effected by an amendment to this
         Agreement, executed by all of the Members setting forth the value of
         such Member's contribution to the Company and the resulting Membership
         Percentage Interests of the newly admitted Member or Members and any
         other Member or Members of the Company and any other modifications to
         this Agreement occasioned thereby.

23.      Seizure of Interest of Member.

         (a) In the event of the seizure of the interest in the Company of any
         Member by a creditor of the Member, the Company shall have the right
         and option to either:

                  (i) bond out the seizure, or

                  (ii) satisfy the debt on account of which the seizure was
                  made, or

                  (iii) take no action.

         (b) If the Company shall elect to bond out the seizure, the Member
         whose interest was seized shall be indebted to the Company for the
         premiums and other expenditures of the Company incurred by reason of
         the bonding out of the seizure.

         (c) If the Company shall satisfy the debt on account of which the
         seizure was made, the Company shall automatically be subrogated to all
         of the rights of the seizing creditor against the Member whose Company
         interest was seized with respect to the debt so satisfied by the
         Company.

         (d) In the event of seizure of the interest in the Company of any
         Member, such Member shall no longer have any right to participate in
         the management of the Company as set forth in Paragraph 8 hereof or to
         serve as a CEO, Director or other Manager of the Company and shall have
         no right to appoint any person to any such position.





                                      -19-
<PAGE>   20

24.      Liquidation.

         (a) Upon termination of the Company as provided in Paragraph 6, the
         Members jointly acting as liquidator, shall proceed to wind up the
         affairs of the Company and to liquidate the Company in an orderly
         manner. The liquidator of the Company shall collect all revenues and
         liquidate the assets, to the extent deemed necessary and advisable, and
         shall distribute (or establish appropriate reserves therefor) the
         proceeds and the unliquidated assets, if any, in accordance with the
         following priorities:

                  (i) First, payment and discharge of debts and liabilities of
                  the Company;

                  (ii) Second, liquidation of Members' Capital Accounts; and

                  (iii) Third, if any proceeds or unliquidated assets remain
                  after satisfaction of the above priorities (i) and (ii), such
                  remaining proceeds and unliquidated assets shall be
                  distributed to the Members in accordance with their Membership
                  Percentage Interests.

         (b) Any gain or loss on disposition of the assets of the Company in
         liquidation shall be credited or charged to the Members in proportion
         to their Membership Percentage Interests.

         (c) Any property distributed in kind shall be valued by an independent
         appraisal at its fair market value and then treated as though the
         property were sold at such fair market value as of the time of such
         distribution (with a resulting allocation of profits and losses) and
         the cash proceeds were distributed. In-kind distributions shall be made
         at the discretion of the liquidator and, if made, shall to the extent
         possible be made on the basis of particular properties being
         distributed to particular Members in full ownership.

25.      Applicable Law. The relations of the Members with each other and with 
third persons shall be governed by the laws of the State of Louisiana.

26.      Notices. Notices required or permitted by this Agreement shall be given
(a) to each Member (and to legal representatives and successors) at the Member's
permanent mailing address as hereinabove set forth and (b) to the Company at its
principal place of business, with copies to each Member at their said permanent
mailing address. The Company or any Member may change the address for the giving
of notices to it or him by giving the Company and all other Members a notice of
the new address. Any such notice or communication (a) sent by express overnight
courier or facsimile will be considered given on the first business day
following the date of dispatch and (b) delivered personally will be considered
given on the date of such delivery. Nothing contained in this Paragraph 26 will
excuse failure to give prompt or



                                      -20-
<PAGE>   21

immediate oral notice for purposes of informing the other Member of an event
which requires such notice, but such oral notice will not satisfy the
requirements of written notice set forth in this Paragraph 26.

27.      Waiver. No failure or delay by any Member in exercising any right,
power or remedy under this Agreement will operate as a waiver thereof, nor will
any single or partial exercise of the same preclude any further exercise thereof
or the exercise of any other right, power or remedy. No waiver by any Member of
any breach of any provision hereof will be deemed to be a waiver of any
subsequent breach of that or any other provision thereof.

28.      Amendments. Except as otherwise provided herein, this Agreement may be
amended only by an instrument in writing signed by all Members.

29.      Separability of Provisions. If for any reason, any provision hereof is
determined to be invalid and contrary to any existing or future law, such
invalidity shall not impair the operation of or affect those portions of this
Agreement which are valid.

         This Operating Agreement may be executed in any number of multiple
originals or counterparts, each of which shall be binding upon and inure to the
benefit of the parties and their respective heirs, successors and assigns,
jointly, severally and in solido.
         IN WITNESS WHEREOF, the parties hereto have executed this Amended and
Restated Operating Agreement effective as of the date first hereinabove set
forth.


WITNESSES                              NEWPARK HOLDINGS, INC.

                                       By: 
- --------------------------------           ----------------------------------
                                          James D. Cole
                                          President
- --------------------------------          
                                       OLS CONSULTING SERVICES, INC.

                                       By: 
- --------------------------------           ----------------------------------
                                          Ores Paul Seaux
                                          President
- --------------------------------         





                                      -21-




<PAGE>   1


                                  EXHIBIT 21.1
                         SUBSIDIARIES OF THE REGISTRANT

1.       BATSON MILL L.P.

2.       BOCKMON CONSTRUCTION COMPANY, INC.

3.       CHESSHER CONSTRUCTION, INC.

4.       CHEMICAL TECHNOLOGIES, INC.

5.       CONSOLIDATED MAYFLOWER MINES

6.       EXCALIBAR MINERALS, INC.

7.       EXCALIBAR MINERALS OF LA., L.L.C.
         (FORMERLY IBERIA BARITE, L.L.C.)

8.       FLORIDA MAT RENTAL, INC.

9.       HYDRA FLUIDS INTERNATIONAL, LTD.

10.      INTERNATIONAL MAT, LTD.

11.      IML DE VENEZUELA, LLC

12.      JPI ACQUISITION CORP.

13.      MALLARD & MALLARD, INC.

14.      MALLARD & MALLARD OF LA., INC.

15.      NES PERMIAN BASIN, L.P.

16.      NDF MEXICO, INC.

17.      NEWPARK CANADA, INC.

18.      NEWPARK DRILLING FLUIDS CANADA, INC.
         (FORMERLY PROTECT MUD SERVICE, LTD.)

19.      NEWPARK DRILLING FLUIDS, INC.
         (FORMERLY SAMPEYOBILBOOMESCHE DRILLING FLUIDS MANAGEMENT, INC.)


<PAGE>   2


20.      NEWPARK ENVIRONMENTAL SERVICES, INC.
         (FORMERLY NOW DISPOSAL OPERATING CO.)

21.      NEWPARK ENVIRONMENTAL MANAGEMENT COMPANY, L.L.C.
         (FORMERLY NEWPARK ENVIRONMENTAL SERVICES, L.L.C.)

22.      NEWPARK ENVIRONMENTAL SERVICES MISSISSIPPI, L.P.

23.      NEWPARK ENVIRONMENTAL SERVICES, L.P

24.      NEWPARK HOLDINGS, INC.

25.      NEWPARK PERFORMANCE SERVICES, INC.

26.      NEWPARK SHIPHOLDING TEXAS, L.P.

27.      NEWPARK TEXAS DRILLING FLUIDS, LP. 
         (FORMERLY FMI WHOLESALE DRILLING FLUIDS USA,L.P.)

28.      NEWPARK TEXAS L.L.C.

29.      NID, L.P.

30.      OGS LABORATORY, INC.

31.      SOLOCO FSC, INC.

32.      SOLOCO, L.L.C.

33.      SOLOCO TEXAS, L.P.

34.      SONNEX, INC.

35.      SUPREME CONTEACTORS, L.L.C.


                                       2

<PAGE>   1

                                                                    EXHIBIT 23.1







INDEPENDENT AUDITORS' CONSENT


We consent to the incorporation by reference in Registration Statement Nos.
33-22291, 33-54060, 33-62643, 33-83680, and 333-07225 of Newpark Resources, Inc.
on Form S-8 and Registration Statement No. 333-65411 on Form S-3 of our report
dated March 26, 1999, appearing in this Annual Report on Form 10-K of Newpark
Resources, Inc. for the year ended December 31, 1998.



DELOITTE & TOUCHE LLP



New Orleans, Louisiana
March 26, 1999


<PAGE>   1
                                                                    EXHIBIT 24.1

                                POWER OF ATTORNEY
                 WITH RESPECT TO THE ANNUAL REPORT ON FORM 10-K
                           OF NEWPARK RESOURCES, INC.



        KNOW ALL MEN BY THESE PRESENTS, that the undersigned, a Director of
NEWPARK RESOURCES, INC., does hereby constitute and appoint James D. Cole and/or
Matthew W. Hardey, his true and lawful attorney and agent to do any and all acts
and things and execute, in the name of the undersigned (whether on behalf of
Newpark Resources, Inc., or as a Director of Newpark Resources, Inc., or by
attesting the seal of Newpark Resources, Inc., or otherwise), any and all
instruments which said attorney and agent may deem necessary or advisable in
order to enable Newpark Resources, Inc. to comply with the Securities Exchange
Act of 1934 and any requirements of the Securities and Exchange Commission in
respect thereof, in connection with the filing of the Annual Report pursuant to
Section 13 or 15(d) of the Securities Exchange Act of 1934 on Form 10-K for the
fiscal year ended December 31, 1997, including specifically but without
limitation thereto, power and authority to sign the name of the undersigned
(whether on behalf of Newpark Resources, Inc., or as a Director of Newpark
Resources, Inc., or by attesting to the seal of Newpark Resources, Inc., or
otherwise) to the Annual Report on Form 10-K to be filed with the Securities and
Exchange Commission, or any of the exhibits filed therewith, or any amendment or
application for amendment of the Annual Report on Form 10-K, or any of the
exhibits filed therewith, and to attest the seal of Newpark Resources, Inc.
thereon and to file the same with the Securities and Exchange Commission; and
the undersigned does hereby ratify and confirm all that said attorneys and
agents, each of them, shall do or cause to be done by virtue hereof. Any one of
said attorneys and agents shall have, and may exercise, all the powers hereby
conferred.

        IN WITNESS WHEREOF, the undersigned has signed his name hereto on the
date set forth opposite his name.


DATED:       FEBRUARY 9, 1999                 /s/ WILLIAM W. GOODSON     
      -------------------------------         ----------------------------
                                              WILLIAM W. GOODSON, 

DIRECTOR

WITNESSES

- -------------------------------------

- -------------------------------------


<PAGE>   2



                                POWER OF ATTORNEY
                 WITH RESPECT TO THE ANNUAL REPORT ON FORM 10-K
                           OF NEWPARK RESOURCES, INC.



        KNOW ALL MEN BY THESE PRESENTS, that the undersigned, a Director of
NEWPARK RESOURCES, INC., does hereby constitute and appoint James D. Cole and/or
Matthew W. Hardey, his true and lawful attorney and agent to do any and all acts
and things and execute, in the name of the undersigned (whether on behalf of
Newpark Resources, Inc., or as a Director of Newpark Resources, Inc., or by
attesting the seal of Newpark Resources, Inc., or otherwise), any and all
instruments which said attorney and agent may deem necessary or advisable in
order to enable Newpark Resources, Inc. to comply with the Securities Exchange
Act of 1934 and any requirements of the Securities and Exchange Commission in
respect thereof, in connection with the filing of the Annual Report pursuant to
Section 13 or 15(d) of the Securities Exchange Act of 1934 on Form 10-K for the
fiscal year ended December 31, 1997, including specifically but without
limitation thereto, power and authority to sign the name of the undersigned
(whether on behalf of Newpark Resources, Inc., or as a Director of Newpark
Resources, Inc., or by attesting to the seal of Newpark Resources, Inc., or
otherwise) to the Annual Report on Form 10-K to be filed with the Securities and
Exchange Commission, or any of the exhibits filed therewith, or any amendment or
application for amendment of the Annual Report on Form 10-K, or any of the
exhibits filed therewith, and to attest the seal of Newpark Resources, Inc.
thereon and to file the same with the Securities and Exchange Commission; and
the undersigned does hereby ratify and confirm all that said attorneys and
agents, each of them, shall do or cause to be done by virtue hereof. Any one of
said attorneys and agents shall have, and may exercise, all the powers hereby
conferred.

        IN WITNESS WHEREOF, the undersigned has signed his name hereto on the
date set forth opposite his name.


DATED:     JANUARY 28, 1999                    /s/ DAVID P. HUNT            
      -----------------------------            ----------------------------
                                                DAVID P. HUNT, DIRECTOR

WITNESSES


- -------------------------------------

- -------------------------------------


<PAGE>   3



                                POWER OF ATTORNEY
                 WITH RESPECT TO THE ANNUAL REPORT ON FORM 10-K
                           OF NEWPARK RESOURCES, INC.



        KNOW ALL MEN BY THESE PRESENTS, that the undersigned, a Director of
NEWPARK RESOURCES, INC., does hereby constitute and appoint James D. Cole and/or
Matthew W. Hardey, his true and lawful attorney and agent to do any and all acts
and things and execute, in the name of the undersigned (whether on behalf of
Newpark Resources, Inc., or as a Director of Newpark Resources, Inc., or by
attesting the seal of Newpark Resources, Inc., or otherwise), any and all
instruments which said attorney and agent may deem necessary or advisable in
order to enable Newpark Resources, Inc. to comply with the Securities Exchange
Act of 1934 and any requirements of the Securities and Exchange Commission in
respect thereof, in connection with the filing of the Annual Report pursuant to
Section 13 or 15(d) of the Securities Exchange Act of 1934 on Form 10-K for the
fiscal year ended December 31, 1997, including specifically but without
limitation thereto, power and authority to sign the name of the undersigned
(whether on behalf of Newpark Resources, Inc., or as a Director of Newpark
Resources, Inc., or by attesting to the seal of Newpark Resources, Inc., or
otherwise) to the Annual Report on Form 10-K to be filed with the Securities and
Exchange Commission, or any of the exhibits filed therewith, or any amendment or
application for amendment of the Annual Report on Form 10-K, or any of the
exhibits filed therewith, and to attest the seal of Newpark Resources, Inc.
thereon and to file the same with the Securities and Exchange Commission; and
the undersigned does hereby ratify and confirm all that said attorneys and
agents, each of them, shall do or cause to be done by virtue hereof. Any one of
said attorneys and agents shall have, and may exercise, all the powers hereby
conferred.

        IN WITNESS WHEREOF, the undersigned has signed his name hereto on the
date set forth opposite his name.


DATED:      JANUARY 30, 1999                     /s/ JAMES H. STONE          
      -----------------------------             ----------------------------
                                                  JAMES H. STONE, DIRECTOR

WITNESSES

- -------------------------------------

- -------------------------------------


<PAGE>   4



                                POWER OF ATTORNEY
                 WITH RESPECT TO THE ANNUAL REPORT ON FORM 10-K
                           OF NEWPARK RESOURCES, INC.



        KNOW ALL MEN BY THESE PRESENTS, that the undersigned, a Director of
NEWPARK RESOURCES, INC., does hereby constitute and appoint James D. Cole and/or
Matthew W. Hardey, his true and lawful attorney and agent to do any and all acts
and things and execute, in the name of the undersigned (whether on behalf of
Newpark Resources, Inc., or as a Director of Newpark Resources, Inc., or by
attesting the seal of Newpark Resources, Inc., or otherwise), any and all
instruments which said attorney and agent may deem necessary or advisable in
order to enable Newpark Resources, Inc. to comply with the Securities Exchange
Act of 1934 and any requirements of the Securities and Exchange Commission in
respect thereof, in connection with the filing of the Annual Report pursuant to
Section 13 or 15(d) of the Securities Exchange Act of 1934 on Form 10-K for the
fiscal year ended December 31, 1997, including specifically but without
limitation thereto, power and authority to sign the name of the undersigned
(whether on behalf of Newpark Resources, Inc., or as a Director of Newpark
Resources, Inc., or by attesting to the seal of Newpark Resources, Inc., or
otherwise) to the Annual Report on Form 10-K to be filed with the Securities and
Exchange Commission, or any of the exhibits filed therewith, or any amendment or
application for amendment of the Annual Report on Form 10-K, or any of the
exhibits filed therewith, and to attest the seal of Newpark Resources, Inc.
thereon and to file the same with the Securities and Exchange Commission; and
the undersigned does hereby ratify and confirm all that said attorneys and
agents, each of them, shall do or cause to be done by virtue hereof. Any one of
said attorneys and agents shall have, and may exercise, all the powers hereby
conferred.

        IN WITNESS WHEREOF, the undersigned has signed his name hereto on the
date set forth opposite his name.


DATED:          FEBRUARY 2, 1999                /s/ ALAN J. KAUFMAN       
      -----------------------------             ----------------------------
                                                ALAN J. KAUFMAN, DIRECTOR

WITNESSES

- -------------------------------------

- -------------------------------------


<PAGE>   5



                                POWER OF ATTORNEY
                 WITH RESPECT TO THE ANNUAL REPORT ON FORM 10-K
                           OF NEWPARK RESOURCES, INC.



        KNOW ALL MEN BY THESE PRESENTS, that the undersigned, a Director of
NEWPARK RESOURCES, INC., does hereby constitute and appoint James D. Cole and/or
Matthew W. Hardey, his true and lawful attorney and agent to do any and all acts
and things and execute, in the name of the undersigned (whether on behalf of
Newpark Resources, Inc., or as a Director of Newpark Resources, Inc., or by
attesting the seal of Newpark Resources, Inc., or otherwise), any and all
instruments which said attorney and agent may deem necessary or advisable in
order to enable Newpark Resources, Inc. to comply with the Securities Exchange
Act of 1934 and any requirements of the Securities and Exchange Commission in
respect thereof, in connection with the filing of the Annual Report pursuant to
Section 13 or 15(d) of the Securities Exchange Act of 1934 on Form 10-K for the
fiscal year ended December 31, 1997, including specifically but without
limitation thereto, power and authority to sign the name of the undersigned
(whether on behalf of Newpark Resources, Inc., or as a Director of Newpark
Resources, Inc., or by attesting to the seal of Newpark Resources, Inc., or
otherwise) to the Annual Report on Form 10-K to be filed with the Securities and
Exchange Commission, or any of the exhibits filed therewith, or any amendment or
application for amendment of the Annual Report on Form 10-K, or any of the
exhibits filed therewith, and to attest the seal of Newpark Resources, Inc.
thereon and to file the same with the Securities and Exchange Commission; and
the undersigned does hereby ratify and confirm all that said attorneys and
agents, each of them, shall do or cause to be done by virtue hereof. Any one of
said attorneys and agents shall have, and may exercise, all the powers hereby
conferred.

        IN WITNESS WHEREOF, the undersigned has signed his name hereto on the
date set forth opposite his name.


DATED:        FEBRUARY 22, 1999                   /s/ DIBO ATTAR        
      -----------------------------             ----------------------------
                                                  DIBO ATTAR, DIRECTOR

WITNESSES

- -------------------------------------

- -------------------------------------




<TABLE> <S> <C>

<ARTICLE> 5
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-START>                             JAN-01-1998
<PERIOD-END>                               DEC-31-1998
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<SECURITIES>                                         0
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<DEPRECIATION>                                  55,610
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<CURRENT-LIABILITIES>                           43,391
<BONDS>                                        208,057
                                0
                                          0
<COMMON>                                           688
<OTHER-SE>                                     241,809
<TOTAL-LIABILITY-AND-EQUITY>                   504,479
<SALES>                                        256,808
<TOTAL-REVENUES>                               256,808
<CGS>                                          176,551
<TOTAL-COSTS>                                  244,794
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<LOSS-PROVISION>                                 9,180
<INTEREST-EXPENSE>                              11,554
<INCOME-PRETAX>                               (92,559)
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</TABLE>

<TABLE> <S> <C>

<ARTICLE> 5
<RESTATED> 
<MULTIPLIER> 1,000
       
<S>                             <C>                     <C>                     <C>
<PERIOD-TYPE>                   3-MOS                   6-MOS                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-1998             DEC-31-1998             DEC-31-1998
<PERIOD-START>                             JAN-01-1998             JAN-01-1998             JAN-01-1998
<PERIOD-END>                               MAR-31-1998             JUN-30-1998             SEP-30-1998
<CASH>                                          16,310                  12,627                  10,114
<SECURITIES>                                         0                       0                       0
<RECEIVABLES>                                   92,999                  91,679                  83,393
<ALLOWANCES>                                     2,262                   2,216                   7,397
<INVENTORY>                                     20,496                  22,883                  23,087
<CURRENT-ASSETS>                               133,272                 130,151                 119,618
<PP&E>                                         271,664                 321,411                 317,782
<DEPRECIATION>                                  69,599                  82,278                  69,876
<TOTAL-ASSETS>                                 482,200                 527,426                 528,245
<CURRENT-LIABILITIES>                           43,922                  34,042                  39,986
<BONDS>                                        127,064                 160,267                 184,435
                                0                       0                       0
                                          0                       0                       0
<COMMON>                                           658                     670                     682
<OTHER-SE>                                     290,979                 313,958                 290,713
<TOTAL-LIABILITY-AND-EQUITY>                   482,200                 527,426                 528,245
<SALES>                                         72,404                 139,423                 202,322
<TOTAL-REVENUES>                                72,404                 139,423                 202,322
<CGS>                                           42,719                  82,234                 125,211
<TOTAL-COSTS>                                   52,377                 102,328                 172,043
<OTHER-EXPENSES>                                     0                       0                       0
<LOSS-PROVISION>                                     0                       0                   4,000
<INTEREST-EXPENSE>                               2,638                   5,262                   8,059
<INCOME-PRETAX>                                 17,413                  31,925                (13,659)
<INCOME-TAX>                                     6,186                  11,589                 (2,439)
<INCOME-CONTINUING>                             11,227                  20,336                (11,220)
<DISCONTINUED>                                       0                       0                       0
<EXTRAORDINARY>                                      0                       0                       0
<CHANGES>                                            0                       0                 (1,326)
<NET-INCOME>                                    11,227                  20,336                (12,546)
<EPS-PRIMARY>                                     0.17                    0.31                  (0.19)
<EPS-DILUTED>                                     0.17                    0.30                  (0.19)
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 5
<RESTATED> 
<MULTIPLIER> 1,000
       
<S>                             <C>                     <C>                     <C>                     <C>
<PERIOD-TYPE>                   3-MOS                   6-MOS                   9-MOS                   12-MOS
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<PERIOD-START>                             JAN-01-1997             JAN-01-1997             JAN-01-1997             JAN-01-1997
<PERIOD-END>                               MAR-31-1997             JUN-30-1997             SEP-30-1997             DEC-31-1997
<CASH>                                           3,138                   3,733                   6,179                  21,699
<SECURITIES>                                         0                       0                       0                       0
<RECEIVABLES>                                   54,738                  12,652                  62,613                  77,034
<ALLOWANCES>                                     1,731                   2,206                   1,925                   2,266
<INVENTORY>                                      6,280                   7,925                  18,305                  21,489
<CURRENT-ASSETS>                                73,946                  78,207                  90,778                 123,642
<PP&E>                                         170,997                 200,452                 223,681                 254,786
<DEPRECIATION>                                  43,820                  51,293                  56,808                  63,728
<TOTAL-ASSETS>                                 308,730                 346,324                 381,771                 451,623
<CURRENT-LIABILITIES>                           37,125                  35,016                  35,315                  34,760
<BONDS>                                         43,994                  63,091                  76,392                 127,996
                                0                       0                       0                       0
                                          0                       0                       0                       0
<COMMON>                                           611                     635                     645                     651
<OTHER-SE>                                     210,156                 233,179                 256,969                 269,334
<TOTAL-LIABILITY-AND-EQUITY>                   308,730                 346,324                 381,771                 451,623
<SALES>                                         47,501                 100,046                 162,540                 233,245
<TOTAL-REVENUES>                                47,501                 100,046                 162,540                 233,245
<CGS>                                           29,422                  60,972                  98,449                 138,392
<TOTAL-COSTS>                                   34,332                  71,736                 116,147                 166,118
<OTHER-EXPENSES>                                     0                       0                       0                       0
<LOSS-PROVISION>                                     0                       0                       0                       0
<INTEREST-EXPENSE>                                 894                   1,923                   2,810                   4,265
<INCOME-PRETAX>                                 11,512                  24,902                  41,274                  59,987
<INCOME-TAX>                                     4,150                   9,024                  15,201                  22,246
<INCOME-CONTINUING>                              7,362                  15,878                  26,073                  37,741
<DISCONTINUED>                                       0                       0                       0                       0
<EXTRAORDINARY>                                      0                       0                       0                       0
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<NET-INCOME>                                     7,362                  15,878                  26,073                  37,741
<EPS-PRIMARY>                                     0.12                    0.25                    0.41                    0.59
<EPS-DILUTED>                                     0.11                    0.25                    0.40                    0.58
        

</TABLE>


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