TETRA TECHNOLOGIES INC
10-K405, 2000-03-30
INDUSTRIAL INORGANIC CHEMICALS
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                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549


                                    FORM 10-K

(Mark One)
     [X]  Annual Report Pursuant to Section 13 or 15(d) of the Securities
          Exchange Act of 1934

                   For the fiscal year ended December 31, 1999
                                       or
     [ ]  Transition Report Pursuant to Section 13 or 15(d) of the Securities
          Exchange Act of 1934

 For the transition period from _____________________ to _____________________


                           Commission File No. 0-18335


                            TETRA Technologies, Inc.
             (Exact name of registrant as specified in its charter)


                    Delaware                           74-2148293
           (State or other jurisdiction of          (I.R.S. Employer
            incorporation or organization)          Identification No.)

                25025 I-45 North
              The Woodlands, Texas                      77380
      (ADDRESS OF PRINCIPAL EXECUTIVE OFFICES)        (ZIP CODE)


(Registrant's Telephone Number, Including Area Code):  (281) 367-1983

Securities Registered Pursuant to Section 12(b) of the Act:

Common Stock, par value $0.01 per share           New York Stock Exchange
        (Title of class)                 (Name of Exchange on Which Registered)

    Rights to purchase Series One                 New York Stock Exchange
Junior Participating Preferred Stock     (Name of Exchange on Which Registered)
        (Title of Class)

Securities Registered Pursuant to Section 12(g) of the Act:  NONE

      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 Regulation 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]

      The aggregate market value of the common stock of TETRA Technologies, Inc.
held by non-affiliates (based upon the March 28, 2000 closing sale price as
reported by the New York Stock Exchange) ($12.44 per share) was approximately
$167,568,455. For purposes of the preceding sentence only, all directors,
executive officers and beneficial owners of 10% or more of the common stock are
assumed to be "affiliates".

      Number of shares outstanding of each of the issuer's classes of common
stock, as of March 28, 2000 was 13,470,133 shares.

      Part III information is incorporated by reference from the proxy statement
for the annual meeting of stockholders to be held May 19, 2000.

<PAGE>
                                TABLE OF CONTENTS


                                     PART 1

Item 1.  Business......................................................   2

Item 2.  Properties....................................................  13

Item 3.  Legal Proceedings.............................................  14

Item 4.  Submission of Matters to a Vote of Security Holders...........  14


                                     PART II

Item 5.  Market for the Registrant's Common Equity and
           Related Stockholder Matters.................................  14

Item 6.  Selected Financial Data.......................................  15

Item 7.  Management's Discussion and Analysis of Financial Condition
           and Results of Operations...................................  16

Item 7A. Quantitative and Qualitative Disclosures About Markets Risks..  20

Item 8.  Financial Statements and Supplementary Data...................  20

Item 9.  Changes in and Disagreements with Accountants on Accounting
           and Financial Disclosure....................................  20


                                    PART III

Item 10. Directors and Executive Officers of the Registrant............  20

Item 11. Executive Compensation........................................  20

Item 12. Security Ownership of Certain Beneficial Owners and Management  21

Item 13. Certain Relationships and Related Transactions................  21


                                     PART IV

Item 14. Exhibits, Financial Statement Schedules and Reports on
           Form 8-K ...................................................  22

<PAGE>
      THIS ANNUAL REPORT ON FORM 10-K 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, INCLUDING,
WITHOUT LIMITATION, STATEMENTS CONCERNING FUTURE SALES, EARNINGS, COSTS,
EXPENSES, ACQUISITIONS OR CORPORATE COMBINATIONS, ASSET RECOVERIES, WORKING
CAPITAL, CAPITAL EXPENDITURES, FINANCIAL CONDITION AND OTHER RESULTS OF
OPERATION. SUCH STATEMENTS REFLECT THE COMPANY'S CURRENT VIEWS WITH RESPECT TO
FUTURE EVENTS AND FINANCIAL PERFORMANCE AND ARE SUBJECT TO CERTAIN RISKS,
UNCERTAINTIES AND ASSUMPTIONS, INCLUDING THOSE DISCUSSED IN "ITEM 1. DESCRIPTION
OF BUSINESS -- CERTAIN BUSINESS RISKS." SHOULD ONE OR MORE OF THESE RISKS OR
UNCERTAINTIES MATERIALIZE, OR SHOULD UNDERLYING ASSUMPTIONS PROVE INCORRECT,
ACTUAL RESULTS MAY VARY MATERIALLY FROM THOSE ANTICIPATED, BELIEVED, ESTIMATED
OR PROJECTED.


                                     PART I


Item 1.  Business.

     GENERAL

     TETRA Technologies, Inc. ("TETRA" or "the Company") is an energy services
company with an integrated chemicals operation that supplies feedstocks to
energy markets, as well as other markets.

     The Company's Oil & Gas Services Division markets chemical products,
including those produced by the Chemicals Division, and systems to the oil and
gas industry for use in well completion and workover operations in both domestic
and international markets. It also provides associated on-site fluid
engineering, fluid management and handling, and filtration services for
completion and workover applications, as well as a line of specialty drilling
fluids products. The Oil & Gas Services Division also offers oil and gas well
abandonment/decommissioning services, production testing services and systems
for minimizing or eliminating oil related wastes.

     The Company's Chemicals Division manufactures and markets chemicals to the
energy, agriculture, water treatment, industrial, cement, food processing, ice
melt and consumer products markets. The Division uses proprietary technologies
to convert low-cost feedstocks into high quality commercial products. The
Division's Chlorides group produces liquid and dry calcium chloride and also
markets hydrochloric acid. The Micronutrients group manufactures and distributes
zinc and manganese products to the feed and fertilizer markets, as well as
calcium chloride-based agricultural products. The Division also markets a line
of desiccant products, predominantly calcium chloride based, to the consumer
products market under the trademark Damp Rid(R). The Bromine group manufactures
and distributes calcium bromide, zinc bromide and sodium bromide to the energy
and water treatment markets.

     During the fourth quarter of 1999, the Company implemented a strategic
restructuring program to refocus its effort in the energy services business.
This program will concentrate the Company's efforts on developing its oil and
gas services business and will sell or consolidate non-core chemical operations.
To achieve this strategy, the Company is actively pursuing the disposition of
its micronutrients business, as well as several smaller chemicals-related
operations. Additionally, the Company has implemented plans to exit certain
product lines and businesses which are not core to its new strategic direction.
The remaining chemicals business will consist of a commodity products based
operation, which principally supports the energy service markets. The Company
has also embarked on an aggressive program to reorganize its overhead structure
to reduce costs and improve operating efficiencies in support of the energy
services operations.

      TETRA Technologies, Inc. was incorporated in Delaware in 1981. All
references to the Company or TETRA include TETRA Technologies, Inc. and its
subsidiaries. The Company's corporate headquarters are located at 25025
Interstate 45 North in The Woodlands, Texas, and its phone number is
281/367-1983.

                                   - 2 -
<PAGE>
     PRODUCTS AND SERVICES

            OIL & GAS SERVICES DIVISION.

            The Company's Oil & Gas Services Division markets its clear brine
fluids systems to the oil and gas industry for use in well drilling, completion
and workover operations in the United States and in international markets. The
Division also provides associated on-site fluid engineering, fluid management
and handling, and filtration services. The Oil & Gas Services Division also
offers oil and gas well abandonment/decommissioning, production testing services
and process services.

            DRILLING AND COMPLETION FLUIDS SYSTEMS

            The liquid calcium chloride, zinc bromide and calcium bromide
produced by the Chemicals Division are referred to as clear brine fluids
("CBFs") in the oil and gas industry. CBFs are solids-free, clear salt solutions
that, like conventional drilling "muds", have high specific gravities and are
used as weighting fluids to control bottom-hole pressures during oil and gas
completion and workover activities. The use of CBFs increases production by
reducing the likelihood of damage to the well bore and productive pay zone. CBFs
are particularly important in offshore completion and workover operations due to
the increased formation sensitivity, much greater investment necessary to drill
offshore, and the consequent higher cost of error. CBFs are distributed through
the Company's Oil & Gas Services Division and they are also sold to other
companies who service customers in the oil and gas industry.

            The Oil & Gas Services Division provides basic and custom blended
CBFs to domestic and international oil and gas well operators, based on the
specific need of the customer and the proposed application of the product. In
addition, the Division provides these customers a broad range of associated
services, including on-site fluid filtration, handling and recycling, fluid
engineering consultation, and fluid management. The Company also repurchases
used CBFs from operators and recycles and reconditions these materials. Selling
used CBFs to the Company reduces the net cost of the CBFs to the operator and
minimizes the need for disposal of those fluids. The Company recycles the CBFs
through filtration, blending and the addition of chemicals, and then markets the
recycled CBFs.

            The Oil & Gas Services Division's fluid engineering and management
personnel use proprietary technology to determine the proper blend for a
particular application to maximize the effectiveness and life span of the CBFs.
The specific volume, density, crystallization point and chemical composition of
the CBFs are modified by the Company to satisfy a customer's requirements. The
Company's filtration services use a variety of techniques and equipment for the
on-site removal of particulates from CBFs so that those CBFs can be recirculated
back into the well. The Company's filtration systems reduce fluid loss, which
allows operators to complete and workover wells in environmentally sensitive
areas with greater safety. This also enables recovery of a greater percentage of
used CBFs for recycling.

            The Division's PayZone(R) Drill-In Fluids systems use clear brine
fluids as the basis for this line of specialized drilling fluid systems, some of
which were recently patented. These systems are used during drilling,
completing, underreaming, reentry and workover operations through the sensitive
pay zone of the well, to increase oil and gas recovery. The Division's ACT
clean-up systems (patent pending) are designed to quickly and uniformly clean up
drill-in fluids filtercake from the payzone to increase oil and gas production.

            WELL ABANDONMENT/DECOMMISSIONING

            The Oil & Gas Services Division's well abandonment business provides
services for depleted oil and gas wells onshore, in inland waters, and offshore
Texas and Louisiana. The Division first entered this business in 1994 in an
effort to expand the services offered to its customers and to capitalize on
existing personnel, equipment and facilities along the Louisiana and Texas Gulf
Coast. The well abandonment business was significantly expanded in 1996 with the
purchase of the assets of Culberson Well Service in Texas and Inland Rigs in
Louisiana. This business, which has operating hubs in Bryan, Rosenberg and
Victoria, Texas and Lafayette and Houma, Louisiana, operates onshore rigs,
barge-mounted rigs, a jack-up rig, a platform rig, and offshore rigless
packages. In 1997, the Division

                                   - 3 -
<PAGE>
further expanded this business through the acquisitions of Perfco Wireline, Inc.
and a related company, which were involved in the electric wireline service
business. These operations provide pressure transient testing, reservoir
evaluation, well performance evaluation, cased hole and memory production
logging, perforating, bridge plug and packer service, and pipe recovery to major
oil companies operating in the Gulf of Mexico. The Company continued to expand
its well abandonment services business in 1997 by acquiring an oilfield tubular
goods sales, reconditioning and service business from Posey Pipe and Equipment
Company. Well abandonment services are marketed through nine service facilities
in Houma and Lafayette, Louisiana and Alice, Bryan, Rosenberg, Edinburg, Laredo,
Midland and Victoria, Texas.

            PRODUCTION TESTING

            These operations provide pressure and volume testing of oil and gas
wells, predominantly in the South Texas and Northern Mexico areas, which
facilitate the sophisticated evaluation techniques needed for reservoir
management and optimization of well work-over programs. Management of the
Company believes that the Division's Production Testing group maintains the
largest fleet of high pressure production testing equipment in the South Texas
area, with operations in Alice, Edinburg and Laredo, Texas, as well as Reynosa,
Mexico.

            PROCESS SERVICES

            The Division also provides oil recovery and residuals separation and
recycling services to approximately 17% of the existing petroleum refining
capacity in the United States. This group utilizes various technologies,
including a proprietary thermal desorption and recovery technology and various
separation technologies, such as centrifuges and filter presses. These
technologies are used to separate, collect and recycle oil and water from
petroleum residuals. The Process Services Group typically builds, owns and
operates fixed systems on its customers' sites to provide these services under
long-term contracts. The group has begun to offer these services
internationally, and to related domestic and international markets including
hydrocarbon exploration, production and transportation.


      CHEMICALS DIVISION.

      The principal operations of the Chemicals Division are the manufacture and
marketing of various commercial chemical products. The Division has eleven
chemical facilities that focus on three primary product lines: calcium chloride,
bromine products and micronutrients. These plants primarily convert low-cost,
low-value raw materials produced by industrial chemical manufacturing processes
into high quality products. The Division also markets a line of desiccant
products that incorporates dry calcium chloride to the consumer products market
to reduce mold and mildew odors.

            CHLORIDES

            The Chlorides group has four facilities that convert co-product
hydrochloric acid from nearby sources into various liquid and dry calcium
chloride products. These operations are located near Lyondell's Lake Charles,
Louisiana TDI plant; Shell's Norco, Louisiana epoxy resins plant; Vulcan's
Wichita, Kansas chlorinated solvents plant; and DuPont's Parkersburg, West
Virginia fluoromonomer plant. Some of these facilities consume feedstock from
other sources as well. Dry calcium chloride is produced at the Company's Lake
Charles plant. With production capacity of at least 100,000 tons of dry product
per year, the Lake Charles plant can produce both 80% and 97% calcium chloride
products. The Company also has a solar evaporation plant located in Amboy,
California, which produces liquid calcium chloride from underground brine
reserves to supply the Western States markets.

            The Chemicals Division also manufactures a line of desiccant
products at its Orlando, Florida plant for distribution into the consumer
products market. These products, marketed under the trademark DampRid(R), reduce
mold and mildew odors. The primary ingredient in these products is dry calcium
chloride. This acquisition has enabled the Division to vertically integrate its
dry calcium chloride business and access the consumer products markets.

                                      - 4 -
<PAGE>
            BROMINE

            The Bromine group manufactures and distributes elemental bromine,
zinc bromide, calcium bromide and sodium bromide. The West Memphis, Arkansas
facility produces calcium bromide and zinc bromide using zinc-containing sludges
from electroplating operations and low-cost hydrobromic acid. The West Memphis
facility was recently expanded and can now use bromine and other sources of zinc
as raw materials. The Company was awarded a U.S. patent on this new production
process. The expanded plant became operational during the first quarter of 1999,
substantially increasing the facility's capacity while producing a higher
quality product.

            In late 1996, the Company entered into a joint venture with Dow
Chemical Company to build a facility at Dow's Ludington, Michigan chemical
facility to convert a crude bromine stream from Dow's calcium/magnesium
chemicals operation into merchant bromine, calcium bromide and sodium bromide.
This facility started producing calcium bromide and sodium bromide in mid 1998
and merchant bromine in the fourth quarter of 1998.

            The Company also owns a plant in Magnolia, Arkansas that is designed
to produce calcium bromide. Approximately 33,000 gross acres of bromine
containing brine reserves are under lease in the area of the plant to support
its production. The plant is not currently in operation, and the Company
continues to evaluate its strategy related to these assets and its developing
bromine and derivatives business.

            MICRONUTRIENTS

            The Division's Micronutrients group manufactures and distributes
calcium chloride-based agricultural products and zinc and manganese sulfate
micronutrients. These micronutrients are widely used to provide trace minerals
to meet the nutritional needs of animals and plants. Production facilities are
located in Tampico, Mexico, Fairbury, Nebraska, and Cheyenne, Wyoming. The
Tampico plant produces manganese sulfate using manganous oxide and sulfuric
acid. The Fairbury and Cheyenne plants produce zinc sulfate using secondary zinc
raw materials and sulfuric acid.

            In January 1999, the Company expanded its presence in the
micronutrients business with the acquisition of WyZinCo Inc., which has a zinc
sulfate manufacturing plant in Cheyenne, Wyoming, and certain assets of Cozinco,
Inc. These newly acquired assets manufacture zinc sulfate from secondary zinc
sources and sulfuric acid. Expansion of the Tampico plant was completed in early
1999 to include a new manganous oxide production facility, which the Company
believes will provide lower-cost raw material manganous oxide to the manganese
sulfate plant, and will also produce a higher assayed manganese sulfate product.
This expansion is designed to increase the manganese sulfate production capacity
by 20%, provide a higher grade 32% manganese sulfate product, and permit the
sale of manganous oxide.

            This group also markets calcium chloride-based agricultural products
that is an efficient vehicle for delivering calcium to plants and, when combined
with nitrogen-based fertilizers, increases the efficiency of nitrogen
fertilizers. These calcium chloride and nitrogen products are sold as liquid
blends under a variety of trademarks, including N-CAL(R), Hi-Cal(R) and
Sodex(R). In early 1999 the Company was awarded a US patent on a
moisture-resistant dry calcium chloride and urea product. The Micronutrients
group is evaluating the market potential of this new product.


      SOURCES OF RAW MATERIALS

            OIL & GAS SERVICES DIVISION.

            The Oil & Gas Services Division purchases calcium chloride, calcium
bromide and zinc bromide CBFs from the Chemicals Division for resale to its oil
and gas customers. The Oil & Gas Services Division recycles zinc and calcium
bromide CBFs repurchased from its oil and gas customers. The Division also
purchases CBFs from two domestic and one foreign manufacturer.

                                      - 5 -
<PAGE>
            CHEMICAL DIVISION.

            Some of the primary sources of raw materials for the Chemicals
Division are low-cost chemical co-product streams obtained from chemical
manufacturers.

            At the Norco, Louisiana, Wichita, Kansas, Lake Charles, Louisiana,
and Parkersburg, West Virginia calcium chloride production plants, the principal
raw material is co-product hydrochloric acid produced by other chemical
companies. The Company has written agreements with those chemical companies
regarding the supply of this raw material, but believes that there are numerous
alternative sources of supply. During 1999, the Company received written notice
to terminate the Shell Norco plant supply agreement with the Company, which will
run through December 2001. The Company plans on using alternate production
facilities and sources to meet their market demands of liquid calcium chloride.
The Company produces calcium chloride at its Amboy facility from brine recovered
from underground wells. These brines are deemed adequate to supply the Company's
foreseeable need for calcium chloride in that market area. Substantial
quantities of limestone are also consumed when converting hydrochloric acid into
calcium chloride. The Company uses a proprietary process that permits the use of
less expensive limestone, while maintaining end-use product quality. The Company
purchases limestone from several different sources.

            To produce zinc bromide and calcium bromide at its West Memphis
facility, the Company uses hydrobromic acid, bromine, zinc sludges, and other
sources of zinc raw materials. The Company has one internal source of bromine
and several external sources of co-product hydrobromic acid. The Company uses a
proprietary and patented process that permits the use of cost advantaged raw
materials, while maintaining high product quality.

            In 1997, the Company entered into a series of agreements with the
Dow Chemical Company to purchase crude bromine, build a bromine derivatives
plant at Dow's magnesium and calcium chloride facility in Ludington, Michigan,
and toll produce purified bromine and various brominated chemical products at
that plant. The new Ludington plant, which started operations during 1998, gives
the Company the flexibility to produce purified bromine (for use at the West
Memphis facility or for sale), sodium bromide and calcium bromide. The Company's
need for bromine and its derivatives has increased steadily.

            The Company also owns a calcium bromide manufacturing plant near
Magnolia, Arkansas, that was constructed in 1985 and has a production capacity
of 100 million pounds of calcium bromide per year. This plant was acquired in
1988 and is not in operation. The Company currently has approximately 33,000
gross acres of bromine containing brine reserves under lease. While this plant
is designed to produce calcium bromide, it could be modified to produce
elemental bromine or select bromine compounds. The Company believes it has
sufficient brine reserves under lease to operate a world-scale bromine facility
for 25 to 30 years. Development of the brine field, construction of necessary
pipelines and reconfiguration of the plant would take several years and require
a substantial additional capital investment. During 1996, the Company entered
into a long-term supply agreement with a foreign producer of calcium bromide.
This agreement, coupled with production of zinc bromide and bromine and
derivatives from the new Ludington plant and the West Memphis, Arkansas
facility, should afford the Company additional flexibility in its development of
the Magnolia plant, allowing it to consider manufacturing other bromine
derivatives at that facility.

            The Division's Micronutrients' plants purchase co-product sulfuric
acid from a variety of sources, one of which is under a long-term contract. The
Fairbury plant and the Cheyenne plant are capable of utilizing various forms of
secondary zinc, primarily co-products of the galvanizing industry, which it
obtains from a variety of sources. The Tampico plant utilizes manganous oxide,
which it obtains from one internal and numerous external sources.

      MARKET OVERVIEW AND COMPETITION

            OIL & GAS SERVICES DIVISION.

            The Oil & Gas Services Division markets and sells clear brine
fluids, drilling and completion fluids systems, and related products and
services to major oil and gas exploration and production areas worldwide.
Current foreign areas of market presence include the North Sea, Mexico, South
America, the Far East and West Africa. The

                                      - 6 -
<PAGE>
Division's principal competitors in the sale of CBFs to the oil and gas industry
are Baroid Corporation, a subsidiary of Halliburton, Inc., M.I. Drilling Fluids,
a subsidiary of Smith International, Inc., Ambar Chemical, Inc. and OSCA, Inc.,
a subsidiary of Great Lakes Chemical Corporation. This market is highly
competitive and competition is based primarily on service, availability and
price. Although all competitors provide fluid handling, filtration and recycling
services, the Company believes that its historical focus on providing these and
other value-added services to its customers has enabled it to compete very
successfully with all companies. Because of the significant use of CBFs in
deeper natural gas and offshore well completions and workovers, a modest change
in drilling in these areas could have a material impact on the profitability of
both the Chemicals and Oil & Gas Services Divisions. Major customers of the Oil
& Gas Services Division include Shell Oil Company, Texaco, Baker Hughes Inteq,
Amerada Hess, BP Amoco, Oryx Energy, Elf Acquitane, Chevron USA, Phillips
Petroleum Company, Conoco USA, Vastar Resources and Coastal Oil & Gas.

            The Division's well abandonment/decommissioning services group
markets its services to major oil and gas companies, independent operators, and
state governmental agencies. Major customers include Texaco, Exxon/Mobil, Shell,
Chevron, BP Amoco, Fina, Conoco, Union Pacific Resources, El Paso, Louisiana
Conservation Commission and the Railroad Commission of the State of Texas. The
geographical scope of these services include the upper and lower Gulf Coast
regions of Texas, South Texas, West Texas, East Texas, Louisiana, Gulf Coast
inland waterways and the shallow, state waters of the Gulf of Mexico. The
Company's principal competitors in this business include Superior Energy
Services, Inc., Apollo and Cross Offshore Corp. This market is highly
competitive and competition is based primarily on service, availability and
price. The Division believes its focus on core competency in well abandonment
operations has allowed it to better provide the complete portfolio of equipment,
experience and administration required to manage its customers' needs.

            Competitors of the Division's Production Testing group include
Fesco, Key Energy Group, TriTech and Clemenson. Major customers include Conoco,
Pioneer, Fina, Shell, Chevron, Coastal, Enron, Houston Exploration, Texaco,
Union Pacific Resources and Pemex, the national oil company in Mexico.


            CHEMICALS DIVISION.

            Markets for the Company's liquid and dry calcium chloride products
include the oil and gas exploration industry, industrial, municipal, mining,
janitorial and consumer markets for snow and ice melt products, dust control,
cement curing, and road stabilization markets, and certain agricultural and food
industry businesses. Most of these markets are highly competitive. Damp Rid(R)
products are marketed to the consumer products industry. The Company's major
competitors in the dry calcium chloride market include Dow Chemical Company,
General Chemical Company, a Canadian company, and Ambar Chemical, Inc.

            The Bromine group sells elemental bromine and several brominated
derivative products in North America to customers in the oil and gas industry
(as completion fluids) and the water treatment industry (as biocides). Major
competitors include Great Lakes Chemical Company, Albermarle and Dead Sea
Bromine.

            The Micronutrients group sells zinc and manganese sulfate as plant
micronutrients to numerous agricultural distributors, including fertilizer
manufacturers, in the United States and in Mexico and several other foreign
countries. The group sells zinc sulfate and manganese sulfate as animal feed
micronutrients to major trace mineral pre-mix manufacturers in the United
States, as well as to a number of smaller distributors. These markets are highly
competitive, with major domestic competitors including Fritt Industries, Old
Bridge, Bay Zinc and Sims. The Company also competes against Chinese and Mexican
producers of these products.

OTHER BUSINESS MATTERS

      MARKETING AND DISTRIBUTION

                                      - 7 -
<PAGE>
      The Oil & Gas Services Division markets its domestic products and services
through its distribution facilities located principally in the United States'
Gulf Coast region that are in close proximity to both product supplies and
customer concentrations. Since transportation costs can represent a large
percentage of the total delivered cost of chemical products, particularly liquid
chemicals, the Division believes that its strategic locations make it one of the
lowest cost suppliers of liquid calcium chloride and other CBFs in the southern
United States. International markets that are served include the U.K. and
Norwegian sectors of the North Sea, Colombia, Mexico, Venezuela, Western Africa,
the C.I.S. and the Far East.

      The Chemicals Division markets its products and services through offices
and sales agents in Arizona, California, Colorado, Connecticut, Florida,
Georgia, Nebraska, Pennsylvania, Texas, Wyoming and Mexico, as well as through a
network of distributors located throughout the Midwest, West, Northeast,
Southeast and Southwest. To service these distributors, the Division has over
two dozen distribution facilities strategically located to provide efficient,
low-cost product availability. Damp Rid(R) products are marketed through sales
agents to various mass merchandisers, hardware and home centers and grocery and
drug stores in the U.S. and internationally through distributors. The Bromine
group markets its products directly and through distributors and sales agents.

      BACKLOG

      In most of the Company's operations, its products are shipped or services
rendered shortly after receipt of the order; accordingly, the level of backlog
is not indicative of corporate sales activity. On December 31, 1999, the Company
had an estimated backlog of work of $44.6 million, of which approximately $20.6
million is expected to be billed during 2000. On December 31, 1998, the Company
had an estimated backlog of $30.1 million.

      EMPLOYEES

      As of December 31, 1999, the Company had 1,383 employees. None of the
Company's U.S. employees are presently covered by a collective bargaining
agreement. However, in 1998 the employees of the Company's Lake Charles,
Louisiana calcium chloride production facility elected to be represented by the
Paper, Allied Industrial, Chemical and Energy Workers International union, and
representatives of the Company and that union are in the process of negotiating
a collective bargaining agreement. The Company believes that its relations with
its employees are good.

      PATENTS, PROPRIETARY TECHNOLOGY AND TRADEMARKS

      The Company actively pursues a policy of seeking patent protection both in
the U.S. and abroad for appropriate technology. As of December 31, 1999, the
Company owned or licensed 16 issued U.S. patents, had 10 patents pending in the
U.S., had 1 issued foreign patent and 9 foreign patents pending. The foreign
patents and patent applications are primarily foreign counterparts to U.S.
patents or patent applications. The issued patents expire at various times
through 2017. The Company has elected to maintain certain other internally
developed technologies, know-how and inventions as trade secrets. While the
Company believes that the protection of its patents and trade secrets is
important to its competitive positions in its businesses, the Company does not
believe any one patent or trade secret is essential to the success of the
Company.

      It is the practice of the Company to enter into confidentiality agreements
with key employees, consultants and third parties to whom the Company discloses
its confidential and proprietary information. There can be no assurance,
however, that these measures will prevent the unauthorized disclosure or use of
the Company's trade secrets and expertise or that others may not independently
develop similar trade secrets or expertise. Management of the Company believes,
however, that it would require a substantial period of time, and substantial
resources, to develop similar know- how or technology independently. As a
policy, the Company uses all possible legal means to protect its patents, trade
secrets and other proprietary information.

      The Company sells various products and services under a variety of trade
marks and service marks, some of which are registered in the U.S. or certain
foreign countries.

                                      - 8 -
<PAGE>
      ENVIRONMENTAL REGULATION

      Various environmental protection laws and regulations have been enacted
and amended during the past three decades in response to public concerns over
the environment. The operations of the Company and its customers are subject to
the various evolving environmental laws and corresponding regulations, which are
enforced by the US Environmental Protection Agency and various other federal,
state and local environmental authorities. Similar laws and regulations designed
to protect the health and safety of the Company's employees and visitors to its
facilities are enforced by the US Occupational Safety and Health Administration
and other state and local agencies and authorities. The Company must comply with
the requirements of environmental laws and regulations applicable to its
operations, including the Federal Water Pollution Control Act of 1972, the
Resource Conservation and Recovery Act of 1976 ("RCRA"), the Clean Air Act of
1977, the Comprehensive Environmental Response, Compensation and Liability Act
of 1980, the Superfund Amendments and Reauthorization Act of 1986, the Federal
Insecticide, Fungicide, and Rodenticide Act of 1947, Hazardous Materials
Transportation Act of 1975, and Pollution Prevention Act of 1990. The Company is
also subject to the applicable environmental and health and safety rules and
regulations of the local, state and federal agencies in Mexico for its Sulfamex
operation in Tampico, Mexico and in those foreign countries in which its Oil &
Gas Services Division operates. Many state and local agencies have imposed
environmental laws and regulations with stricter standards than their federal
counterparts. The Company and its customers and suppliers are affected by all
these regulatory programs.

      At the Company's Lake Charles, West Memphis, Parkersburg, Cheyenne,
Fairbury and Amboy production plants, the Company holds various permits
regulating air emissions, wastewater and storm water discharges, the disposal of
certain hazardous and non-hazardous wastes, and/or wetlands. The Company has
also submitted a RCRA Part B storage permit application for its Fairbury
facility. In addition, the Company is subject to certain federal, state and
local community-right-to-know regulations.

      The Company believes that its chemical manufacturing plants and other
facilities are in general compliance with all the applicable environmental and
health and safety laws and regulations. Since its inception, the Company has not
had a history of any significant fines or claims in connection with
environmental or health and safety matters. However, risks of substantial costs
and liabilities are inherent in certain plant operations and certain products
produced at the Company's plants and there can be no assurance that significant
costs and liabilities will not be incurred. Changes in the environmental and
health and safety regulations could subject the Company's handling, manufacture,
use, reuse, or disposal of materials at plants to stricter scrutiny. The Company
cannot predict the extent to which its operations may be affected by future
regulatory and enforcement policies.

      CERTAIN BUSINESS RISKS

      The Company identifies the following important risk factors, which could
affect the Company's actual results and cause actual results to differ
materially from any such results that might be projected, forecast, estimated or
budgeted by the Company in this report:

            MARKETS

            The Company's operations are materially dependent on the level of
oil and gas well completion and workover activity, both in the United States and
internationally. Such activity level is affected both by short-term and
long-term trends in oil and gas prices. In recent years, oil and gas prices and,
therefore, the level of well completion and workover activity, have been
volatile. Worldwide military, political and economic events, including
initiatives by the Organization of Petroleum Exporting Countries, have
contributed to, and are likely to continue to contribute to, price volatility.
Any prolonged reduction in oil and gas prices may depress the level of well
completion and workover activity and result in a corresponding decline in the
demand for the Company's products and services and, therefore, have a material
adverse effect on the Company's revenues and profitability.

                                      - 9 -
<PAGE>
            Much of the Company's growth strategy, particularly in its chemicals
operations, depends upon its ability to sell its products in markets in which it
is not now well-established or to customers it does not now serve. There is no
assurance that the Company's efforts to penetrate these markets will be
successful.

            The Company's micronutrients business can also be significantly
affected by fluctuations in farming activity and weather conditions throughout
the farm belt. Worldwide commodity prices can influence what crops are planted
and, accordingly, the types of fertilizer applications that are employed.
Extreme weather conditions can also delay and sometimes postpone crop planting.

            COMPETITION

            The Company encounters and expects to continue to encounter intense
competition in the sale of its products. The Company competes with numerous
companies in its chemicals and oil and gas operations and with numerous
companies in its process technologies operations. Many of the Company's
competitors have substantially greater financial and other resources than the
Company, including certain governmentally owned or operated competitors. To the
extent these competitors offer comparable products or services at lower prices,
or higher quality and more cost-effective products or services, the Company's
business could be materially adversely affected.

            SUPPLY OF RAW MATERIALS

            The Company sells a variety of clear brine fluids, including
brominated clear brine fluids such as calcium bromide, zinc bromide and sodium
bromide, and other brominated products, some of which are manufactured by the
Company and some of which are purchased from third parties. The Company also
sells calcium chloride, as a clear brine fluid and in other forms and for other
applications. Sales of calcium chloride and brominated products contribute
significantly to the Company's revenues. In its manufacture of calcium chloride,
the Company uses hydrochloric acid and other raw materials purchased from third
parties. In its manufacture of brominated products, the Company uses bromine,
hydrobromic acid and other raw materials, including various forms of zinc, that
are purchased from third parties. The Company acquires brominated products from
a variety of third party suppliers. In its manufacture of zinc and manganese
sulfate, the Company uses sulfuric acid and various sources of zinc and
manganese. If the Company was unable to acquire the brominated products,
sulfuric, hydrobromic or hydrochloric acid, zinc or any other raw material
supplies for a prolonged period, the Company's business could be materially
adversely affected.

            POTENTIAL LIABILITY FOR ENVIRONMENTAL OPERATIONS; ENVIRONMENTAL
            REGULATION

            The Company's operations are subject to extensive and evolving
Federal, state and local laws and regulatory requirements, including permits,
relating to environmental affairs, health and safety, waste management and the
manufacture, storage, handling, transportation, use and sale of chemical
products. Governmental authorities have the power to enforce compliance with
these regulations and permits, and violators are subject to civil and criminal
penalties, including civil fines, injunctions or both. Third parties may also
have the right to pursue legal actions to enforce compliance. It is possible
that increasingly strict environmental laws, regulations and enforcement
policies could result in substantial costs and liabilities to the Company and
could subject the Company's handling, manufacture, use, reuse, or disposal of
substances or pollutants to scrutiny. The Company's business exposes it to risks
such as the potential for harmful substances escaping into the environment and
causing damages or injuries, which could be substantial. Although the Company
maintains general liability insurance, this insurance is subject to coverage
limits and generally excludes coverage for losses or liabilities relating to
environmental damage or pollution. The Company maintains a limited amount of
environmental liability insurance covering named locations and environmental
risks associated with contract services for oil and gas operations and refinery
waste treatment operations. The Company could be materially adversely affected
by an enforcement proceeding or a claim that was not covered or was only
partially covered by insurance.

            In addition to increasing the Company's risk of environmental
liability, the promulgation of stricter environmental laws, regulations and
enforcement policies has accelerated the growth of some of the markets served by
the Company. Decreased regulation and enforcement could materially adversely
affect the demand for the types of

                                     - 10 -
<PAGE>
systems offered by the Company's process technologies operations and, therefore,
materially adversely affect the Company's business.

            RISKS RELATED TO ACQUISITIONS AND INTERNAL GROWTH

            The Company's aggressive growth strategy includes both internal
growth and growth by acquisitions. Acquisitions require significant financial
and management resources both at the time of the transaction and during the
process of integrating the newly acquired business into the Company's
operations. Internal growth requires both financial and management resources as
well as hiring additional personnel. The Company's operating results could be
adversely affected if it is unable to successfully integrate such new companies
into its operations or is unable to hire adequate personnel. Future acquisitions
by the Company could also result in issuances of equity securities or the rights
associated with the equity securities, which could potentially dilute earnings
per share. In addition, future acquisitions could result in the incurrence of
additional debt or contingent liabilities and amortization expenses related to
goodwill and other intangible assets. These factors could adversely affect the
Company's future operating results and financial position.

            RELIANCE ON SIGNIFICANT CUSTOMERS

            In 1999 and 1998, no customers accounted for more than 10% of
consolidated revenues. In 1997 one customer who generated revenues of $22
million accounted for more than 10% of consolidated revenues.

            WEATHER RELATED FACTORS

            Demand for the Company's Oil and Gas Services Division's products
and services are subject to seasonal fluctuation due in part to weather
conditions, which cannot be predicted. Demand for the Company's Specialty
Chemical Division's products, especially calcium chloride used for ice and snow
melt and its agricultural products, also fluctuates due to weather conditions.
The Company's operating results may vary from quarter to quarter depending on
weather conditions in applicable areas in the United States and in international
markets.


            RISKS RELATED TO GROSS MARGIN

            The Company's operating results in general, and gross margin
percentage in particular, are functions of the product mix sold in any period.
Other factors, such as unit volumes, heightened price competition, changes in
sales and distribution channels, shortages in raw materials due to timely
supplies or ability to obtain items at reasonable prices, and availability of
skilled labor, may also continue to affect the cost of sales and the fluctuation
of gross margin percentages in future periods.

            PATENT AND TRADE SECRET PROTECTION

            The Company owns numerous patents, patent applications and
unpatented trade secret technologies in the U.S. and certain foreign countries.
There can be no assurance that the steps taken by the Company to protect its
proprietary rights will be adequate to deter misappropriation of its proprietary
rights. In addition, independent third parties may develop competitive or
superior technologies.

            DEPENDENCE ON PERSONNEL

            The Company's success depends upon the continued contributions of
its personnel, many of whom would be difficult to replace. The success of the
Company will depend on the ability of the Company to attract and retain skilled
employees. Changes in personnel, therefore, could adversely affect operating
results.

                                     - 11 -
<PAGE>
      THE FOREGOING REVIEW OF FACTORS PURSUANT TO THE PRIVATE SECURITIES
LITIGATION REFORM ACT OF 1995 SHOULD NOT BE CONSTRUED AS EXHAUSTIVE. IN ADDITION
TO THE FOREGOING, THE COMPANY WISHES TO REFER READERS TO THE COMPANY'S OTHER
FILINGS AND REPORTS WITH THE SECURITIES AND EXCHANGE COMMISSION, INCLUDING ITS
RECENT REPORTS ON FORM 10-Q, FOR A FURTHER DISCUSSION OF THE COMPANY'S BUSINESS
AND OPERATIONS AND RISKS AND UNCERTAINTIES THAT COULD CAUSE ACTUAL RESULTS TO
DIFFER MATERIALLY FROM THOSE CONTAINED IN FORWARD-LOOKING STATEMENTS, SUCH AS
THIS REPORT. THE COMPANY UNDERTAKES NO OBLIGATION TO PUBLICLY RELEASE THE RESULT
OF ANY REVISIONS TO ANY SUCH FORWARD-LOOKING STATEMENTS WHICH MAY BE MADE TO
REFLECT THE EVENTS OR CIRCUMSTANCES AFTER THE DATE HEREOF OR TO REFLECT THE
OCCURRENCE OF UNANTICIPATED EVENTS.

                                     - 12 -

<PAGE>
ITEM 2.  PROPERTIES.

      The following table sets forth certain information concerning facilities
leased or owned by the Company as of December 31, 1999. The Company believes its
facilities are adequate for its present needs.


  DESCRIPTION                        LOCATION      APPROXIMATE SQUARE FOOTAGE(1)
  -----------                        --------      -----------------------------

Oil and gas distribution facilities. Texas - eleven locations          1,262,700
                                     Louisiana - six locations           732,200
                                     United Kingdom - various locations   92,000
                                     Mexico - various locations           30,000
                                     Nigeria                              28,000
                                     Venezuela                            16,000
                                     Norway - various locations           15,000
                                     Colombia                             11,500

Process Services offices
  and service center................ The Woodlands, Texas                  6,000
                                     Houston, Texas                       23,000

Process Services facilities......... Texas - six locations                92,000
                                     Delaware                             20,000
                                     Louisiana                            12,000
                                     Illinois                              7,400

Chemical plant facilities........... Amboy, California        59 square miles(2)
                                     Cheyenne, Wyoming                  14 acres
                                     Lake Charles, Louisiana             751,500
                                     West Memphis, Arkansas              697,800
                                     Tampico, Mexico                     353,800
                                     Magnolia, Arkansas                  120,000
                                     Parkersburg, West Virginia          106,300
                                     Fairbury, Nebraska                   90,000
                                     Norco, Louisiana                     85,200
                                     Orlando, Florida                     35,800
                                     Wichita, Kansas                      19,500
                                     Ludington, Michigan                  10,000

Laboratory.......................... The Woodlands, Texas                 26,000

Headquarters........................ The Woodlands, Texas                 55,000


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

(1) Includes real property and buildings unless otherwise noted.
(2) Includes solar evaporation ponds.

                                     - 13 -
<PAGE>
ITEM 3. LEGAL PROCEEDINGS.

      The Company is a named defendant in numerous lawsuits and a respondent in
certain other governmental proceedings arising in the ordinary course of
business. While the outcome of such lawsuits and other proceedings cannot be
predicted with certainty, management does not expect those matters to have a
material adverse impact on the Company.

ITEM 4. SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS.

      No matters were submitted to a vote of security holders of the Company,
through solicitation of proxies or otherwise, during the fourth quarter of the
year ended December 31, 1999.

                                       PART II

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

        PRICE RANGE OF COMMON STOCK

      The Common Stock traded on the National Market System of the National
Association of Securities Dealers, Inc. Automated Quotation System ("NASDAQ")
from the Company's initial public offering on April 3, 1990 through October 13,
1997 under the trading symbol "TTRA." On October 15, 1997 the Common Stock began
trading on the New York Stock Exchange under the symbol "TTI." As of March 24,
2000 there were approximately 3,130 holders of record of the Common Stock. The
following table sets forth the high and low closing sale prices of the Common
Stock for each calendar quarterly period in the two years ended December 31,
1999, as reported by the New York Stock Exchange. Over-the-counter market
quotations reflect inter-dealer prices, without retail mark-up, mark-down or
commission and may not necessarily represent actual transactions.

                                           HIGH        LOW
1999                                      ------      ------
   First Quarter....................      $10.63        6.38
   Second Quarter...................        9.75        6.80
   Third Quarter....................       11.99        8.06
   Fourth Quarter...................       10.20        6.40

1998
   First Quarter....................      $24.75      $19.75
   Second Quarter...................       25.38       16.00
   Third Quarter....................       16.25       11.50
   Fourth Quarter...................       13.75        8.00




      DIVIDEND POLICY

      The Company has never paid cash dividends on its Common Stock. The Company
currently intends to retain earnings to finance the growth and development of
its business and does not anticipate paying cash dividends in the foreseeable
future. Any payment of cash dividends in the future will depend upon the
financial condition, capital requirements and earnings of the Company as well as
other factors the Board of Directors may deem relevant.

                                     - 14 -
<PAGE>
ITEM 6. SELECTED FINANCIAL DATA.

<TABLE>
<CAPTION>
                                                                       YEAR ENDED DECEMBER 31,
                                              -----------------------------------------------------------------------
                                                1999             1998          1997             1996          1995
                                              ---------        ---------     ---------        ---------     ---------
                                                              (IN THOUSANDS, EXCEPT PER SHARE AMOUNTS)
<S>                                           <C>              <C>           <C>              <C>           <C>
INCOME STATEMENT DATA:
  Revenues ...............................    $ 215,301        $ 238,468     $ 219,413        $ 160,790     $ 113,468
  Gross profit ...........................       45,937           60,435        62,982           48,644        37,655
  Operating income (loss) ................       (3,022)(1)       21,380        25,037(2)        20,781        13,430
  Interest expense .......................       (7,756)          (6,458)       (3,305)          (1,250)         (159)
  Interest income ........................          388              172           305              198           959
  Other income (expense), net ............          (81)            (478)        1,065              779           330
  Net income, before cumulative effect
    of accounting change .................       16,014(3)         8,898        13,936           13,137         9,366
  Net income per share, before cumulative
    effect of accounting change ..........    $    1.18        $    0.66     $    1.05        $    1.02     $    0.74
  Average shares .........................       13,524           13,561        13,297           12,873        12,693
  Net income per diluted share, before
    cumulative effect of accounting change    $    1.18        $    0.64     $    0.98        $    0.97     $    0.72
  Average diluted shares .................       13,576           13,994        14,189           13,545        13,069
</TABLE>

(1) Includes special charge of $4,745 and restructuring charge of $2,320.
(2) Includes unusual charges of $3.0 million.
(3) Includes gain on the sale of administrative building of $6,731 and gain of
    sale of business of $29,629.

<TABLE>
<CAPTION>
                                                                       YEAR ENDED DECEMBER 31,
                                              -----------------------------------------------------------------------
                                                1999             1998          1997             1996          1995
                                              ---------        ---------     ---------        ---------     ---------
<S>                                           <C>              <C>           <C>              <C>           <C>
BALANCE SHEET DATA
  Working capital ........................    $ 74,706         $ 88,299      $ 68,076         $ 37,398      $ 30,088
  Total assets ...........................     290,636          311,008       263,792          178,506       129,921
  Long-term liabilities ..................      94,313          129,066        92,364           31,756         9,364
  Stockholders' equity ...................     149,421          139,322       129,580          108,022        89,286
</TABLE>


      The net income per share amounts prior to 1997 have been restated as
required to comply with Statement of Financial Accounting Standards No. 128,
Earnings Per Share. For further discussion of earnings per share, see the notes
to the consolidated financial statements.

                                     - 15 -
<PAGE>
ITEM 7.  MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS
         OF OPERATIONS.

      RESULTS OF OPERATIONS


      The following table presents, for the periods indicated, the percentage
relationship which certain items in the Company's statement of operations bear
to revenues, and the percentage increase or decrease in the dollar amount of
such items. The following data should be read in conjunction with the
Consolidated Financial Statements and the associated Notes contained elsewhere
in this document.

<TABLE>
<CAPTION>
                                        PERCENTAGE OF REVENUES            PERIOD-TO-
                                        YEAR ENDED DECEMBER 31,         PERIOD CHANGE
                                       -------------------------       ---------------
                                                                       1999       1998
                                                                        VS         VS
                                       1999       1998      1997       1998       1997
                                       ----       ----      ----       ----       ----
<S>                                    <C>        <C>       <C>        <C>        <C>
Revenues ........................      100.0%     100.0%    100.0%     (9.7)%     (8.7)%
Cost of Revenues ................       78.7       74.7      71.3      (4.9)     (13.8)
Gross profit ....................       21.3       23.3      28.7     (24.0)       4.0
General & administrative expenses       19.4       16.4      17.3       7.3       (2.9)
Special and restructuring charges        3.3       --        --       100.0       --
Operating income ................       (1.4)       9.0      11.4    (114.1)      14.6
Gain of sale of building and TPT
  business ......................       16.8       --        --       100.0       --
Interest expense ................        3.6        2.7       1.5      20.0      (95.4)
Interest income .................        0.2        0.1       0.1     125.6       43.6
Other income/expense, net .......       --          0.2       0.5     (83.1)    (144.9)
Income before income taxes and
cumulative effect of accounting
change ..........................       12.0        6.1      10.5      77.1       36.7
Income before cumulative effect
   of accounting change .........        7.4        3.7       6.4      80.0       36.2
Cumulative effect of accounting
change, net of tax ..............        2.6       --        --       100.0       --
Net income ......................        4.8        3.7       6.4      15.0       36.2
</TABLE>


      1999 COMPARED TO 1998

      Total revenues for the year ended December 31, 1999 were $215.3 million
compared to $238.5 million in 1998, a decrease of $23.2 million or 9.7%.
Revenues from the Oil & Gas Services Division were $120.6 million, down $28.4
million or 19.1%, from the 1998 level of $149.0 million. The Division's revenue
decline is the direct result of the reduction in drilling activity throughout
the energy industry and the resulting pricing pressures that accompany it. The
international operations and the Gulf Coast offshore business were both off
approximately 30% from the prior year. The onshore business was down only about
10%, primarily on the strength of the Inland Water plug and abandon and wireline
businesses. Chemicals Division revenues for the year were $108.2 million,
including inter company, compared to $106.7 million in 1998. During the year,
the Company sold its Process Technologies business (TPT), which generated $4.1
million in revenues in 1999 and $15.6 million in 1998. Revenues of the Division
improved approximately $13.0 million, excluding TPT, with the majority coming in
the Micronutrients group. With the acquisition of the CoZinCo assets and WyZinCo
stock, the micronutrients business expanded significantly. Additionally,
production volumes at the Fairbury, Nebraska plant also improved substantially
from prior years. The Division's calcium chloride business also showed improved
revenues over the prior year.

      Gross profits for the year were $45.9 million, down $14.5 million or 24%
from $60.4 million in 1998. Gross profits in the Oil & Gas Services Division
were down significantly as volumes declined and pricing pressures were realized
from the general industry slow down. The Division's gross profits percentages
also suffered significantly from these business conditions. The Chemicals
Division gross profits, excluding TPT, increased slightly year-to-year. Most of
this increase was in the Micronutrients group, which benefitted from lower
production costs and the WyZinCo/CoZinCo acquisitions. Gross profits in the
calcium chloride products was down slightly due to the planned shutdown of the
Lake Charles dry plant to reduce inventory levels.

                                     - 16 -
<PAGE>
      General and Administrative expenses were $41.9 million in 1999 compared to
$39.1 in 1998, an increase of $2.8 million. Oil & Gas Services Division expenses
were relatively flat year-to-year. Chemicals Division expenses increased in the
Micronutrients group due to the CoZinCo/WyZinCo acquisition and in the Damp Rid
consumer products group due to additional expenses related to an expanded
advertising program.

      In March 1999, the Company was verbally notified of the early termination
of a significant liquid calcium chloride contract. The Company was subsequently
notified in writing. Under the terms of the contract, the Company is required to
terminate its operations at that location and vacate the facility within two
years from the date of written notification. The Company is also required to
remove all of its equipment and fixtures, at its own cost. As a result of the
early termination of the contract, the Company recorded an impairment of these
Chemicals Division assets of approximately $1.4 million. These assets are
currently in service through the end of the contract.

      Also during the first quarter of 1999, the Company committed to certain
actions that resulted in the impairment of other plant assets in the Company's
Chemicals Division. As a result of increased production volumes achieved at the
new calcium chloride dry plant in Lake Charles, Louisiana, the Company no longer
needs the previously existing dry plant and has subsequently dismantled it,
resulting in an impairment charge of approximately $1.8 million. In addition,
the Company recently completed modifications on the West Memphis, Arkansas
bromine plant. The assets related to the old zinc bromide production unit, which
had a carrying value of approximately $0.4 million, were taken out of service in
the first quarter. The abandoned assets of both plant facilities were written
off during the first quarter. Finally, the Company recognized the impairment of
certain micronutrients' assets totaling approximately $1.1 million. These assets
were deemed impaired with the acquisition of the WyZinCo Company and the CoZinCo
assets and were written off during the first quarter.

      During the fourth quarter of 1999, the Company implemented a strategic
restructuring program to refocus its effort in the energy services business.
This program will concentrate the Company's efforts on developing its oil and
gas services business and will sell or consolidate non-core chemical operations.
To achieve this strategy, the Company is actively pursuing the disposition of
its micronutrients business, as well as several smaller chemicals-related
operations. Additionally, the Company has implemented plans to exit certain
product lines and businesses which are not core to its new strategic direction.
The remaining chemicals business will consist of a commodity products based
operations, which significantly supports the energy service markets. The Company
has also embarked on an aggressive program to reorganize its overhead structure
to reduce costs and improve operating efficiencies in support of the energy
services operations.

      As a result of this change in strategy, the Company recorded a $2.3
million, pretax, restructuring charge in the fourth quarter of 1999, as detailed
below:
                                                DECEMBER 31, 1999
                                               -------------------
                                                 (IN THOUSANDS)
                                                         LIABILITY
                                               EXPENSE    BALANCE
                                               -------    ------
               Involuntary termination costs    $1,170    $1,170
               Contractual costs ...........       760       760
               Exit costs ..................       390       390
                                                ------    ------
                                                $2,320    $2,320
                                                ======    ======

      Involuntary termination costs consist of severance costs associated with
the termination of six management level employees associated with the Company's
restructuring. Contractual costs include obligations triggered in two chemicals
product lines when the Company decided to exit these businesses. The remaining
exit costs are additional liabilities realized by exiting certain portions of
the specialty chemicals business. Of the total restructuring charge,
approximately $1.8 million is associated with the Chemicals Division, $0.1
million with the Oil & Gas Services Division and $0.6 million with corporate
administrative activities. The majority of the costs are expected to be paid
within the next 18 months and will be funded using cashflow from operations.
These restructuring activities may result in additional expenses to be incurred
in 2000, which the Company is unable to quantify at this time.

      Operating income for the year ended December 31, 1999 was a loss of $3.0
million compared to $21.4 million of income in 1998. The drop in earnings
year-to-year reflects the significant drop in the energy services markets, loss
of earnings associated with the sale of TPT, special charges of $4.7 million and
a restructuring charge of $2.3 million.

      In March 1999, the Company sold its corporate headquarters building
realizing a pretax gain of approximately $6.7 million. The Company subsequently
signed a ten-year lease agreement for space within the building.

                                     - 17 -
<PAGE>
      In July 1999, the Company sold its Process Technologies business for $38.8
million. Of these proceeds, $2.0 million was escrowed and could be used to
satisfy certain claims asserted by the buyer within the first year after the
sale. The Company does not anticipate any such claims. The sale, which was
effective May 1, generated a pretax gain of $29.6 million. The proceeds were
used to reduce long-term bank debt. TPT is in the waste and potable water
treatment business and was operated as part of the Chemicals Division. It had
sales of $4.1 million in 1999, $15.6 million in 1998 and $11.4 million in 1997.

      Interest expense increased in 1999 to $7.8 million, reflecting an increase
in long-term debt during the first half of the year and a reduction in
capitalized interest in 1999 due to a reduction in constructed assets. Proceeds
from the TPT and building sale were used to reduce long-term debt.

      Income before cumulative effect of accounting change was $16.0 million in
1999 compared to $8.9 million in 1998, an increase of $7.1 million. Net income
per diluted share before cumulative effect of accounting change was $1.18 in
1999 on 13,576,000 average diluted shares outstanding and $0.64 in 1998 on
13,994,000 average diluted shares outstanding.

      In April 1998, the American Institute of Certified Public Accounts issued
Statement of Position 98-5, REPORTING THE COSTS OF START-UP ACTIVITIES ("SOP
98-5"), which requires that costs related to start-up activities be expensed as
incurred. Prior to 1999, the Company capitalized those costs incurred in
connection with opening a new production facility. The Company adopted the
provisions of the SOP 98-5 in its financial statements for the year ended
December 31, 1999. The effect of adoption of SOP 98-5 was to record a charge for
the cumulative effect of an accounting change of $5.8 million ($0.43 per share),
net of taxes of $3.9 million, to expense costs that had been previously
capitalized prior to 1999.

      Net income for the year was $10.2 million compared to $8.9 million in the
prior year. Net income per diluted share was $0.75 in 1999 on 13,576,000 average
diluted shares outstanding and $0.64 in 1998 on 13,994,000 average diluted
shares outstanding.


      1998 COMPARED TO 1997

      For the year ended December 31, 1998, total revenues were $238.4 million,
up $19.0 million or 9% over the 1997 total of $219.4 million. The Oil & Gas
Services Division's revenues of $149.0 million were up slightly over the prior
year's total of $147.8 million. While the entire Division suffered from the
current dramatic decline in the oil and gas industry, the Division's well
abandonment business was significantly impacted as the major oil companies
initiated substantial delays in well abandonment operations. Offshore revenues
also dropped year-to-year, reflecting the slow down in drilling activity in the
Gulf. The Division's international operations showed a slight increase in
revenues due to increased activity in Norway, Venezuela and Mexico. The
production testing business also generated increased revenues over last year.
Revenues of the Chemicals Division were up approximately 23% over 1997 from
$87.0 million, including intercompany, to $106.7 million in 1998. Despite weak
winter snow and ice melt demand and the decline in the oil and gas markets, the
Division's 1998 chloride and bromide revenues matched 1997 levels. The
Division's micronutrients operations, particularly the American Microtrace
Fairbury plant, showed significant improvement in revenues as product volumes
are approaching planned capacity levels and the customer base is re-established
following the EPA related disruptions in 1997. The Division's consumer products
business also reflected revenue increases resulting from new product
introduction and market penetration. The Process Technologies business increased
over the prior year as well, reflecting a significant increase in wastewater,
deep bed filtration and denitrification business. The Division's revenues were
also impacted favorably from the inclusion of the now wholly-owned TETRA Process
Services.

      Gross profits were $60.4 million in 1998 compared to $63.0 million in
1997, for a decrease of $2.6 million or 4%. The gross profit margin percentage
from operations was 25.3% in 1998 versus 28.7% in 1997. The Chemicals Division's
gross profit percentage was comparable to the prior year. Substantially improved
volumes and pricing at American Microtrace helped offset reduced margins in the
calcium chloride product line, which were caused by market pricing pressures and
product mix. The profit percentage was also down in the Process Technologies
group due to project and revenue mix. The gross profit percentage of the Oil &
Gas Services Division declined in response to the slowdown in the well
abandonment business and pricing pressures in the offshore Gulf Coast business.

      General and administrative expenses were $39.1 million in 1998 compared to
$37.9 million in 1997, for an increase of $1.2 million or 3%. The 1997 period
includes the write-off of $2.2 million associated with American

                                     - 18 -
<PAGE>
Microtrace operations. General and administrative costs increased predominantly
in support of expanded international operations of the Oil & Gas Services
Division and for increased advertising of consumer products in the Chemicals
Division. The Oil & Gas Services Division has continued to implement various
cost-cutting and expense control measures, including personnel reduction, in an
effort to keep its G & A costs in line with its anticipated revenue levels.
These measures are reflected in the fact that the Division's 1998 fourth quarter
G & A costs, excluding international operations, are down from the prior year's
quarter. The inclusion of expenses associated with acquired operations also
accounted for a portion of the increase. G & A expenses as a percentage of
revenues decreased from 17% in 1997 to 16% in 1998.

      Operating income for the twelve months ended December 31, 1998 was $21.4
million, down $3.6 million or 14% from $25.0 million in 1997. This decrease is
the combined result of a gross margin increase of $5.5 million due to increased
volume, a $7.9 million decrease due to the lower gross margin rates, and a $1.2
million increase in general and administrative expenses.

      Interest expense increased approximately $3.1 million during the current
year compared to the prior year period due to increased long-term debt over the
past twelve months in support of the Company's acquisition and internal growth
programs.

      For the twelve months ending December 31, 1998, net income was $8.9
million, down 36% from the $13.9 million reported in 1997. Net income per
diluted share was $0.64 in 1998 on 13,994,000 average diluted shares outstanding
compared to earnings in 1997 of $0.98 based on 14,189,000 average diluted shares
outstanding


      LIQUIDITY AND CAPITAL RESOURCES

      The Company's investment in working capital, excluding cash, cash
equivalents and restricted cash , decreased to $68.5 million at December 31,
1999 from $85.5 million at December 31, 1998. Working capital decreased $6.7
million with the sale of TETRA Process Technologies. Trade payables and accrued
expenses increased $3.0 million during the period as a result of an increase in
federal income taxes payable associated with the TPT sale and liabilities
assumed with the WyZinCo/CoZinCo acquisition. Accounts receivable decreased $2.2
million due to reduced business in the energy services markets and reduced 1999
year-end activity in Micronutrients. Inventories were reduced $2.4 million,
principally in the calcium chlorides group. Changes in trade payable and
expenses, accounts receivable and inventories are net of 1999 acquisitions.

      To fund its capital and working capital requirements, the Company uses
cash flow as well as its general purpose, unsecured, prime rate/LIBOR-based
line-of-credit with a syndicate of banks led by Bank of America. As of December
31, 1999, the Company has $1.6 million in letters of credit and $75.2 million in
long-term debt outstanding against a $120 million line-of-credit. The
line-of-credit matures in 2002.

      The Company's credit facility, which is unsecured, is subject to common
financial ratio covenants. These include, among others, a debt to EBITDA ratio,
a fixed charge coverage ratio, a net worth minimum and dollar limits on the
total amount of capital expenditures and acquisitions the Company may undertake
in any given year. As of December 31, 1999, the Company was in violation of
certain financial covenants of its credit agreement but has received a waiver
agreement from the banks. The Company has a binding commitment from the banks to
amend its current credit facility. This amended credit line will include an
asset-based component of up to $50 million and a $50 million term component
secured with property and equipment. The Company believes this new credit
facility will meet all its capital and working capital requirements. The new
financial covenants, which are effective December 31, 1999, are consistent with
its 2000 business plan.

      In January 1999, the Company purchased the assets of WyZinCo and CoZinCo,
Inc. for approximately $11.7 million in cash and notes. The acquisition, which
included a zinc sulfate plant in Cheyenne, Wyoming and certain assets of a
second zinc sulfate plant located in Salida, Colorado, significantly expanded
the Company's micronutrients business. The purchase was partially funded by
drawing from the Company's credit facility. The Company also used a portion of
the cash generated from the sale of its corporate headquarters building to fund
the acquisition. The sale was completed in March 1999. The building was sold for
approximately $9.7 million, with a subsequent ten-year lease for space in the
building executed by the Company with the new owner. The Company also used a
portion of the proceeds to pay down a portion of its long-term debt.

      Capital expenditures during the twelve months ended December 31, 1999
totaled approximately $13.2 million. Significant components include inland
waters P&A equipment, production testing equipment, well service equipment

                                     - 19 -
<PAGE>
and process service equipment for the Oil & Gas Services Division. The Chemicals
Division's expenditures included the completion of construction of a new
manganous oxide plant in Tampico, Mexico, completion of construction of a new
liquid calcium chloride facility in West Virginia and expansion of the West
Memphis plant.

      The Company believes that its existing funds, cash generated by
operations, funds available under its recently negotiated bank line-of-credit,
as well as other traditional financing arrangements, such as secured credit
facilities, leases with institutional leasing companies and vendor financing,
will be sufficient to meet its current and anticipated operations and its
anticipated capital expenditures through 2000 and thereafter.


      YEAR 2000

      In prior years, the Company discussed the nature and progress of its plans
to become Year 2000 ready. In late 1999, the Company completed its remediation
and testing of systems. The Company experienced no significant disruptions in
information technology or any other systems. The Company is not aware of any
material problems resulting from Year 2000 issues, either with its products, its
internal systems, or the products and services of third parties. The Company
expensed approximately $250,000 during 1999 in connection with remediating its
systems. The Company will continue to monitor its mission critical computer
applications and those of its suppliers and vendors throughout the year to
ensure that any latent Year 2000 matters that may arise are addressed promptly.

ITEM 7A. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK.

      The Company is subject to market risk exposure related to changes in
interest rates on the floating rate portion of its credit facility. These
instruments carry interest at an agreed-upon percentage rate spread above LIBOR.
At December 31, 1999, the Company had $74 million outstanding under its credit
facility, of which $40 million was subject to an interest rate swap and $34
million subject to a floating rate based on LIBOR plus 2.25%. The interest rate
swap agreements provide the Company with a 6.4% fixed interest rate which
mitigates a portion of the Company's risk against changes in interest rates.
Based on this balance, an immediate change of one percent in the interest rate
would cause a change in interest expense of approximately $340,000 on an annual
basis. The Company has no financial instruments subject to foreign currency
fluctuation or commodity price risks.

ITEM 8. FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA.

      The financial statements of the Company and its subsidiaries required to
be included in this Item 8 are set forth in Item 14 of this Report.

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

      There is no disclosure required by Item 304 of Regulation S-K in this
report.


                                    PART III

ITEM 10. DIRECTORS AND EXECUTIVE OFFICERS OF THE REGISTRANT.

      The information required by this Item as to the directors and executive
officers of the Company is hereby incorporated by reference from the information
appearing under the captions "Election of Directors -- Executive Officers" and
"Section 16(a) Beneficial ownership Reporting Compliance."in the Company's
definitive proxy statement which involves the election of directors and is to be
filed with the Securities and Exchange Commission ("Commission") pursuant to the
Securities Exchange Act of 1934 within 120 days of the end to the Company's
fiscal year on December 31, 1999.

ITEM 11. EXECUTIVE COMPENSATION.

      The information required by this Item as to the management of the Company
is hereby incorporated by reference from the information appearing under the
captions "Election of Directors -- Director Compensation" and " -- Compensation
of Executive Officers" in the Company's definitive proxy statement which
involves the election of directors and is to be filed with the Commission
pursuant to the Securities Exchange Act of 1934 within 120 days of the end of
the Company's fiscal year on December 31, 1999. Notwithstanding the foregoing,
in accordance with the instructions to Item 402 of Regulation S-K, the
information contained in the Company's proxy statement under the sub-

                                     - 20 -
<PAGE>
heading "Report of the Compensation Committee of the Board of Directors" and
"Performance Graph" shall not be deemed to be filed as part of or incorporated
by reference into this Form 10-K.

ITEM 12. SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT.

      The information required by this Item as to the ownership by management
and others of securities of the Company is hereby incorporated by reference from
the information appearing under the caption "Security Ownership of Certain
Beneficial Owners and Management" in the Company's definitive proxy statement
which involves the election of directors and is to be filed with the Commission
pursuant to the Securities Exchange Act of 1934 within 120 days of the end of
the Company's fiscal year on December 31, 1999.

ITEM 13. CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS.

      The information required by this Item as to certain business relationships
and transactions with management and other related parties of the company is
hereby incorporated by reference to such information appearing under the
captions "Certain Transactions" and "Compensation Committee Interlocks and
Insider Participation" in the Company's definitive proxy statement which
involves the election of directors and is to be filed with the Commission
pursuant to the Securities Exchange Act of 1934 within 120 days of the end of
the Company's fiscal year on December 31, 1999.

                                     - 21 -
<PAGE>
                                     PART IV


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

(a)  List of documents filed as part of this Report

     1.   Financial Statements of the Company
                                                                          PAGE

          Report of Independent Auditors                                   F-1

          Consolidated Balance Sheets at December 31, 1999 and 1998        F-2

          Consolidated Statements of Operations for the years              F-4
               ended December 31, 1999, 1998, and 1997

          Consolidated Statements of Stockholders' Equity for the
               years ended December 31, 1999, 1998, and 1997               F-5

          Consolidated Statements of Cash Flows for the years
               ended December 31, 1999, 1998, and 1997                     F-6

          Notes to Consolidated Financial Statements                       F-8



     2.   Financial Statement Schedule


              SCHEDULE         DESCRIPTION                                PAGE

                 II      Valuation and Qualifying Accounts                 S-1

          All other schedules are omitted as they are not required, or are not
          applicable, or the required information is included in the financial
          statements or notes thereto.


      3.  List of Exhibits

          3.1   Restated Certificate of Incorporation (filed as an exhibit to
                the Company's Registration Statement on Form S-1 (33-33586) and
                incorporated herein by reference).

          3.2   Bylaws, as amended (filed as an exhibit to the Company's
                Registration Statement on Form S-1 (33-33586) and incorporated
                herein by reference).

          10.1  TETRA Technologies, Inc. 1990 Stock Option Plan (filed as an
                exhibit to the Company's Registration Statement on Form S-1
                (33-33586) and incorporated herein by reference).

          10.2  TETRA Technologies, Inc. 401(K) Retirement Plan (effective
                November 1, 1990) (filed as an exhibit to the Company's
                Registration Statement on Form S-1 (33-39154) and incorporated
                herein by reference).

          10.3  Long-term Supply Agreement with Bromine Compounds Ltd. (filed as
                an exhibit to the Company's Form 10-K for the year ended
                December 31, 1996 and incorporated herein by reference; certain
                portions of this exhibit have been omitted pursuant to a
                confidential treatment request filed with the Securities and
                Exchange Commission).

          10.4  Agreement dated November 28, 1994 between Olin Corporation and
                TETRA-Chlor, Inc. Certain portions of this exhibit have been
                omitted pursuant to a confidential treatment request filed with
                the Securities and exchange Commission (filed as an exhibit to
                the Company's Form 10-K for the year ended December 31, 1994 and
                incorporated herein by reference).

                                     - 22 -
<PAGE>
          10.5  Employment Agreement dated April 1, 1996 with Allen T. McInnes
                (filed as an exhibit to the Company's Form 10-Q for the three
                months ended June 30, 1996 and incorporated herein by
                reference).

          10.6  Credit Agreement, dated April 10, 1997, with Nationsbank of
                Texas, N.A. (filed as an exhibit to the Company's Form 10-Q for
                the three months ended June 30, 1997 and incorporated herein by
                reference).

          10.7  Sales Agreement with Albemarle Corporation. Certain portions of
                this exhibit have been omitted pursuant to a confidential
                treatment request filed with the Securities and Exchange
                Commission (filed as an exhibit to the Company's Form 10-Q for
                the three months ended June 30, 1997 and incorporated herein by
                reference).

          10.8  Amendment to Nonqualified Stock Option Agreement effective
                December 11, 1998 with Allen T. McInnes.

          10.9  Employment Agreement effective February 1, 2000 with Allen T.
                McInnes.

          21    Subsidiaries of the Company.

          23    Consent of Ernst & Young, LLP

          27.1  Financial Data Schedule


(b)  Form 8-K dated July 12, 1999 disclosing the disposition of TETRA Process
     Technologies and related pro forma financial information.

                                     - 23 -
<PAGE>
                                   SIGNATURES

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

                                    TETRA TECHNOLOGIES, INC.



Date:  March 26, 2000               BY:  /s/ GEOFFREY M. HERTEL
                                         ---------------------------------------
                                             Geoffrey M. Hertel, Chief Operating
                                             Officer and Chief Financial Officer


      Pursuant to the requirements of the Securities Exchange Act of 1934, this
report has been signed below by the following persons on behalf of the
Registrant and in the capacities and on the dates indicated:

      SIGNATURE                          TITLE                     DATE


/s/ J. TAFT SYMONDS                    Chairman of              March 26, 2000
- --------------------------        the Board of Directors
    J. Taft Symonds



/s/ GEOFFREY M. HERTEL             Geoffrey M. Hertel          March 26, 2000
- --------------------------    Chief Operating Officer and
    Geoffrey M. Hertel    Chief Financial Officer and Director
                             (Principal Operating Officer)
                             (Principal Financial Officer)



/s/ BRUCE A. COBB                     Bruce A. Cobb            March 26, 2000
- --------------------------         Corporate Controller
    Bruce A. Cobb             (Principal Accounting Officer)



/s/ HOYT AMMIDON, JR.                   Director               March 26, 2000
- --------------------------
    Hoyt Ammidon, Jr.


/s/ PAUL D. COOMBS                      Director               March 26, 2000
- --------------------------
    Paul D. Coombs


/s/ RALPH S. CUNNINGHAM                 Director               March 26, 2000
- --------------------------
    Ralph S. Cunningham


/s/ TOM H. DELIMITROS                   Director               March 26, 2000
- --------------------------
    Tom H. Delimitros


/s/ ALLEN T. MCINNES                    Director               March 26, 2000
- --------------------------
    Allen T. McInnes


/s/ KENNETH P. MITCHELL                 Director               March 26, 2000
- --------------------------
    Kenneth P. Mitchell

                                     - 24 -
<PAGE>
                         REPORT OF INDEPENDENT AUDITORS


Board of Directors and Stockholders
TETRA Technologies, Inc.

      We have audited the accompanying consolidated balance sheets of TETRA
Technologies, Inc. and subsidiaries as of December 31, 1999 and 1998, and the
related consolidated statements of operations, stockholders' equity, and cash
flows for each of the three years in the period ended December 31, 1999. Our
audits also included the financial statement schedule listed in the Index at
Item 14(a). These financial statements and schedule are the responsibility of
the Company's management. Our responsibility is to express an opinion on these
financial statements and schedule based on our audits.

      We conducted our audits in accordance with auditing standards generally
accepted in the United States. 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, the consolidated financial statements referred to above
present fairly, in all material respects, the consolidated financial position of
TETRA Technologies, Inc. and subsidiaries at December 31, 1999 and 1998, and the
consolidated results of their operations and their cash flows for each of the
three years in the period ended December 31, 1999, in conformity with accounting
principles generally accepted in the United States. Also, in our opinion, the
related financial statement schedule, when considered in relation to the basic
financial statements taken as a whole, presents fairly, in all material
respects, the information set forth therein.

      As discussed in Note B to the financial statements, in 1999 the Company
changed its method of accounting for start-up costs.


                                                 ERNST & YOUNG LLP


Houston, Texas
March 28, 2000

                                       F-1
<PAGE>
                    TETRA TECHNOLOGIES, INC. AND SUBSIDIARIES
                           CONSOLIDATED BALANCE SHEETS
                                 (IN THOUSANDS)


<TABLE>
<CAPTION>
                                                                    DECEMBER 31,
                                                               -----------------------
                                                                 1999          1998
                                                               ---------     ---------
ASSETS
<S>                                                            <C>           <C>

Current Assets:
  Cash and cash equivalents ...............................    $   4,184     $   2,803
  Restricted cash .........................................        2,000          --
  Trade accounts receivable, net of allowance for doubtful
    accounts of $1,868 in 1999 and $853 in 1998 ...........       50,220        56,167
  Costs and estimated earnings in excess
     of billings on incomplete contracts ..................         --           5,641
  Inventories .............................................       57,020        58,478
  Deferred tax assets .....................................        4,483         4,099
  Prepaid expenses and other current assets ...............        3,701         3,731
                                                               ---------     ---------
      Total Current Assets ................................      121,608       130,919

Property, Plant and Equipment:
  Land and building .......................................       12,646        16,761
  Machinery and equipment .................................      112,026       109,116
  Automobiles and trucks ..................................        9,261         8,485
  Chemical plants .........................................       52,195        48,040
  Construction in progress ................................        7,538        23,201
                                                               ---------     ---------
                                                                 193,666       205,603
  Less accumulated depreciation and amortization ..........      (63,555)      (60,007)
                                                               ---------     ---------
    Net Property, Plant and Equipment .....................      130,111       145,596

Other Assets:
  Cost in excess of net assets acquired, net of accumulated
    amortization of $3,210 in 1999 and $2,510 in 1998 .....       33,328        26,190
  Other, net of accumulated amortization
    of $3,309 in 1999 and $3,680 in 1998 ..................        5,589         8,303
                                                               ---------     ---------
      Total Other Assets ..................................       38,917        34,493
                                                               ---------     ---------
                                                               $ 290,636     $ 311,008
                                                               =========     =========
</TABLE>

                                       F-2
<PAGE>
                    TETRA TECHNOLOGIES, INC. AND SUBSIDIARIES
                           CONSOLIDATED BALANCE SHEETS
               (IN THOUSANDS, EXCEPT SHARE AND PER SHARE AMOUNTS)


<TABLE>
<CAPTION>

                                                                    DECEMBER 31,
                                                               -----------------------
                                                                 1999          1998
                                                               ---------     ---------
LIABILITIES AND STOCKHOLDERS' EQUITY

<S>                                                            <C>           <C>
Current Liabilities:
   Trade accounts payable .................................    $  25,939     $  29,322
   Accrued expenses .......................................       17,729        11,335
   Billings in excess of costs and estimated
      earnings on incomplete contracts ....................         --             956
   Unearned revenue .......................................        1,002          --
   Current portion of all long-term debt and
      capital lease obligations ...........................        2,232         1,007
                                                               ---------     ---------
         Total Current Liabilities ........................       46,902        42,620

Long-term debt, less current portion ......................       74,000       109,000
Capital lease obligations, less current portion ...........        1,026         1,307
Deferred income taxes .....................................       18,792        17,759
Other liabilities .........................................          495         1,000

Commitments and contingencies

Stockholders' Equity:
   Common stock, par value $.01 per share:
     40,000,000 shares authorized, with 13,529,201 shares
     issued and outstanding in 1999 and 13,514,340
     shares issued and outstanding in 1998 ................          136           136
   Additional paid-in capital .............................       77,988        77,923
   Accumulated other comprehensive income .................         (355)          (96)
    Treasury Stock, at cost, 94,000 shares in 1999 and 1998       (1,107)       (1,168)
   Retained earnings ......................................       72,759        62,527
                                                               ---------     ---------
       Total Stockholders' Equity .........................      149,421       139,322
                                                               ---------     ---------
                                                               $ 290,636     $ 311,008
                                                               =========     =========
</TABLE>

                 See Notes to Consolidated Financial Statements

                                       F-3
<PAGE>
                    TETRA TECHNOLOGIES, INC. AND SUBSIDIARIES
                      CONSOLIDATED STATEMENTS OF OPERATIONS
                    (IN THOUSANDS, EXCEPT PER SHARE AMOUNTS)



<TABLE>
<CAPTION>

                                                           YEAR ENDED DECEMBER 31,
                                                    -------------------------------------
                                                      1999          1998          1997
                                                    ---------     ---------     ---------
<S>                                                 <C>           <C>           <C>
Revenues:
   Product sales ...............................    $ 140,349     $ 147,400     $ 147,927
   Services ....................................       74,952        91,068        71,486
                                                    ---------     ---------     ---------
     Total Revenues ............................      215,301       238,468       219,413

Cost of Revenues:
   Cost of product sales .......................      116,302       111,646       107,379
   Cost of services ............................       53,062        66,387        49,052
                                                    ---------     ---------     ---------
     Total cost of revenues ....................      169,364       178,033       156,431
                                                    ---------     ---------     ---------
       Gross Profit ............................       45,937        60,435        62,982

General and administrative .....................       41,894        39,055        37,945
Special charge .................................        4,745          --            --
Restructuring charge ...........................        2,320          --            --
                                                    ---------     ---------     ---------
       Operating Income ........................       (3,022)       21,380        25,037

Gain of sale of administration building ........        6,731          --            --
Gain on sale of business .......................       29,629          --            --
Interest expense ...............................       (7,756)       (6,458)       (3,305)
Interest income ................................          388           172           305
Other income (expense), net ....................          (81)         (478)        1,065
                                                    ---------     ---------     ---------
Income before income taxes and
   Cumulative effect of accounting change ......       25,889        14,616        23,102

Provision for income taxes .....................        9,875         5,718         9,166
                                                    ---------     ---------     ---------
Income before cumulative effect of
   accounting change ...........................       16,014         8,898        13,936
Cumulative effect of accounting change,
    net of income tax effect ...................       (5,782)         --            --
                                                    ---------     ---------     ---------
       Net Income ..............................    $  10,232     $   8,898     $  13,936
                                                    =========     =========     =========

Net income per share before cumulative
    effect of accounting change ................    $    1.18     $    0.66     $    1.05
Cumulative effect per share of accounting change       ($0.43)         --            --
                                                    ---------     ---------     ---------
Net Income per share ...........................    $    0.75     $    0.66     $    1.05
                                                    =========     =========     =========
Average shares .................................       13,524        13,561        13,297
                                                    =========     =========     =========

Net income per diluted share before cumulative
    effect accounting change ...................    $    1.18     $    0.64     $    0.98
Cumulative effect per share of accounting change    ($   0.43)         --            --
                                                    ---------     ---------     ---------
Net Income per diluted share ...................    $    0.75     $    0.64     $    0.98
                                                    =========     =========     =========
Average diluted shares .........................       13,576        13,994        14,189
                                                    =========     =========     =========
</TABLE>


                 See Notes to Consolidated Financial Statements

                                       F-4
<PAGE>
                    TETRA TECHNOLOGIES, INC. AND SUBSIDIARIES
                 CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY
                                 (IN THOUSANDS)


<TABLE>
<CAPTION>
                                                                                                         ACCUMULATED
                                                                    ADDITIONAL                              OTHER        TOTAL
                                                       COMMON        PAID-IN     TREASURY     RETAINED  COMPREHENSIVE  STOCKHOLDERS'
                                                        STOCK        CAPITAL       STOCK      EARNINGS      INCOME        EQUITY
                                                      ---------     ---------    ---------    ---------  ------------- ------------

<S>                 <C> <C>                           <C>           <C>                 <C>    <C>           <C>          <C>
Balance at December 31, 1996 .....................    $     131     $  67,811     $    --      $  39,693     $     387    $ 108,022


Net Income for 1997 ..............................                                                13,936                     13,936

Translation adjustment ...........................                                                                (473)        (473)
                                                                                                                           --------
  Comprehensive Income ...........................                                                                           13,463

Exercise of common stock options .................            3         2,457                                                 2,460

Tax benefit upon exercise of certain non-qualified
     and incentive stock options .................                      1,636                                                 1,636

Common stock issued for acquisitions .............            1         3,998                                                 3,999
                                                      ---------     ---------     ---------    ---------     ---------    ---------
Balance at December 31, 1997 .....................          135        75,902          --         53,629           (86)     129,580


Net Income for 1998 ..............................                                                 8,898                      8,898

Translation adjustment ...........................                                                                 (10)         (10)
                                                                                                                           --------
  Comprehensive Income ...........................                                                                            8,888

Exercise of common stock options .................            1         1,408                                                 1,409

Purchase of Treasury Stock .......................                                   (1,168)                                 (1,168)

Tax benefit upon exercise of certain non-qualified
      and incentive stock options ................                        613                                                   613
                                                      ---------     ---------     ---------    ---------     ---------    ---------
Balance at December 31, 1998 .....................          136        77,923        (1,168)      62,527           (96)     139,322

Net Income for 1999 ..............................                                                10,232                     10,232

Translation adjustment ...........................                                                                (259)        (259)
                                                                                                                           --------
  Comprehensive Income ...........................                                                                            9,973

Exercise of common stock options .................                         65                                                    65

Issuance of Treasury Stock .......................                                       61                                      61
                                                      ---------     ---------     ---------    ---------     ---------    ---------
Balance at December 31, 1999 .....................    $     136     $  77,988     $  (1,107)   $  72,759     $    (355)    $149,421
                                                      =========     =========     =========    =========     =========     ========
</TABLE>


                 See Notes to Consolidated Financial Statements

                                       F-5
<PAGE>
                    TETRA TECHNOLOGIES, INC. AND SUBSIDIARIES
                      CONSOLIDATED STATEMENTS OF CASH FLOWS
                                 (IN THOUSANDS)


<TABLE>
<CAPTION>

                                                                    YEAR ENDED DECEMBER 31,
                                                              ----------------------------------
                                                                1999         1998         1997
                                                              --------     --------     --------
<S>                                                           <C>          <C>          <C>
Operating Activities:
   Net income ............................................    $ 10,232     $  8,898     $ 13,936
   Adjustments to reconcile net income
     to net cash provided:
     Depreciation and amortization .......................      16,757       16,223       11,575
     Provision for deferred income taxes .................       4,161        2,472        3,236
     Provision for doubtful accounts .....................       1,436          200          253
     Gain on sale of property, plant
       and equipment .....................................         (17)         (38)        (280)
     Restructuring Charge ................................       2,320         --           --
     Special charges .....................................       4,745         --          3,000
     Gain on sale of business ............................     (29,629)        --           --
     Gain of sale of administration building .............      (6,731)        --           --
     Cumulative effect of accounting change,
       net of tax ........................................       5,782         --           --
     Changes in operating assets and liabilities,
       net of effects from acquisition
       of subsidiaries:
        Trade accounts receivable ........................       2,169          526      (10,750)
        Costs and estimated earnings in
          excess of billings
          on incomplete contracts ........................        (986)      (1,620)      (2,611)
        Inventories ......................................       2,350      (19,464)     (15,155)
        Prepaid expenses and other current assets ........        (190)        (953)       3,500
        Trade accounts payable and accrued expenses ......       1,036        1,569        8,003
        Billings in excess of costs and estimated earnings
          on incomplete contracts ........................        (519)         712         (323)
        Unearned income ..................................       1,002         --           --
        Other ............................................        (190)         (17)      (2,114)
                                                              --------     --------     --------
        Net cash provided by operating activities ........      13,728       10,607        5,270
                                                              --------     --------     --------

Investing Activities:
   Purchases of property, plant and equipment ............     (13,229)     (43,239)     (47,360)
   Business combinations, net of cash acquired ...........     (11,658)      (2,135)      (8,107)
   Proceeds from the sale of Process Technologies ........      38,825         --           --
   Proceeds from sale of property, plant and equipment ...      10,688        3,617          662
   Change in Restricted Cash .............................      (2,000)        --           --
   Change in other assets ................................      (1,044)        (607)          15
                                                              --------     --------     --------
      Net cash provided (used) by investing activities ...    $ 21,582     $(42,364)    $(54,790)
                                                              --------     --------     --------
</TABLE>


                 See Notes to Consolidated Financial Statements

                                       F-6
<PAGE>
                    TETRA TECHNOLOGIES, INC. AND SUBSIDIARIES
                      CONSOLIDATED STATEMENTS OF CASH FLOWS
                                 (IN THOUSANDS)

<TABLE>
<CAPTION>

                                                              YEAR ENDED DECEMBER 31,
                                                         ----------------------------------
                                                           1999         1998         1997
                                                         --------     --------     --------
<S>                                                      <C>          <C>          <C>
Financing Activities:
   Proceeds from long-term debt and capital
     lease obligations ..............................    $ 25,615     $ 41,974     $ 55,495
   Payments on long-term debt and
     capital lease obligations ......................     (59,670)     (10,494)      (6,223)
   Proceeds from exercised stock options ............          65        1,409        2,460
   Repurchase of common stock .......................          61       (1,168)        --
   Net repayment and borrowings under short-term
     credit lines ...................................        --           --         (2,202)
                                                         --------     --------     --------
     Net cash provided (used) by financing activities     (33,929)      31,721       49,530
                                                         --------     --------     --------
   Increase (Decrease) in cash ......................       1,381          (36)          10
Cash and cash equivalents at beginning of period ....       2,803        2,839        2,829
                                                         --------     --------     --------
Cash and cash equivalents at end of period ..........    $  4,184     $  2,803     $  2,839
                                                         ========     ========     ========




Supplemental Cash Flow Information:
    Capital lease obligations incurred ..............    $  1,179     $    975     $  1,894
    Capital lease obligations terminated ............       1,465        1,109          798
    Interest paid ...................................       8,358        7,286        3,366
    Taxes paid ......................................       2,600        2,727        2,783
</TABLE>


                 See Notes to Consolidated Financial Statements

                                       F-7
<PAGE>
                    TETRA TECHNOLOGIES, INC. AND SUBSIDIARIES

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

                                DECEMBER 31, 1999



NOTE A  -- ORGANIZATION AND OPERATIONS OF THE COMPANY

      TETRA Technologies, Inc. was incorporated in Delaware in 1981. All
references to the Company or TETRA include TETRA Technologies, Inc. and its
subsidiaries.

      TETRA is an energy services company with an integrated chemicals operation
that supplies feedstocks to energy markets, as well as other markets.

      The Company's Oil & Gas Services Division markets chemicals, including
those produced by the Chemicals Division, to the oil and gas industry for use in
well completion and workover operations in both domestic and international
markets. They also provide complementary on-site fluid engineering, fluid
management and handling services and filtration for completion and workover
applications. The Oil & Gas Services Division also offers a specialty drilling
fluids product line and oil and gas well abandonment and production testing
services. The Division also provides services to process industries and oil and
gas producers to reduce or eliminate refinery and petrochemical wastes.

      The Company's Chemicals Division manufactures and markets chemicals to the
agriculture, mining, water treatment, industrial, cement, food processing, ice
melt and energy markets. The Division also participates in the consumer products
market, offering an array of desiccant products under the trademark DampRid(R).


NOTE B  -- SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

PRINCIPLES OF CONSOLIDATION

      The consolidated financial statements include the accounts of the Company
and its wholly-owned subsidiaries. All significant intercompany accounts and
transactions have been eliminated in consolidation.

CASH EQUIVALENTS

      The Company considers all highly liquid investments with a maturity of
three months or less when purchased to be cash equivalents.

INVENTORIES

      Inventories are stated at the lower of cost or market and consist
primarily of finished goods. Cost is determined using the weighted average
method.

FINANCIAL INSTRUMENTS

      The fair value of the Company's financial instruments, which includes
cash, accounts receivable, short-term borrowings and long-term debt, approximate
their carrying amounts. Financial instruments that subject the Company to
concentrations of credit risk consist principally of trade receivables. The
Company's policy is to evaluate, prior to shipment, each customer's financial
condition and determine the amount of open credit to be extended. The Company
generally requires appropriate, additional collateral as security for credit
amounts in excess of approved limits. The trade receivables include activity
with oil and gas companies and other industrial companies.

                                       F-8
<PAGE>
PROPERTY, PLANT AND EQUIPMENT

      Property, plant, and equipment are stated at the cost of assets acquired.
Expenditures that increase the useful lives of assets are capitalized. The cost
of repairs and maintenance are charged to operations as incurred. For financial
reporting purposes, the Company provides for depreciation using the
straight-line method over the estimated useful lives of assets which are as
follows:

          Building                  25 years
          Machinery and equipment   3 and 5 and 10 years
          Automobiles and trucks    4 years
          Chemical plants           15 years

      Certain production equipment is depreciated based on operating hours or
units of production because depreciation occurs primarily through use rather
than through elapsed time.

      For income tax purposes, the Company provides for depreciation using
accelerated methods. Interest capitalized for the years ended December 31, 1999,
1998 and 1997 was $73,000, $1,346,000 and $505,600, respectively.

ADVERTISING

      The Company expenses costs of advertising as incurred. Advertising expense
for the years ended December 31, 1999, 1998 and 1997 were $3,059,000, $1,326,000
and $1,217,000, respectively.

INTANGIBLE ASSETS

      Patents and licenses are stated on the basis of cost and are amortized
over the estimated useful lives, generally ranging from 14 to 20 years.

Goodwill is amortized on a straight-line basis over its estimated life of 20 -
40 years. On an annual basis, the Company estimates the future estimated
discounted cash flows of the business to which goodwill related in order to
determine that the carrying value of the goodwill had not been impaired.

LONG-LIVED ASSETS

      Impairment losses are recognized when indicators of impairment are present
and the estimated undiscounted cash flows are not sufficient to recover the
assets carrying cost. Assets held for disposal are recorded at the lower of
carrying value or estimated fair value less costs to sell.

INCOME TAXES

      The Company computes income tax expense using the liability method. Under
this method, deferred tax liabilities or assets are determined based on
differences between financial reporting and tax bases of assets and liabilities
and are measured using tax rates and laws that are in effect at year end.

ENVIRONMENTAL LIABILITIES

      Environmental expenditures which result in additions to property and
equipment are capitalized, while other environmental expenditures are expensed.
Environmental remediation liabilities are recorded on an undiscounted basis when
environmental assessments or cleanups are probable and the costs can be
reasonably estimated. These costs are adjusted as further information develops
or circumstances change.

                                       F-9
<PAGE>
STOCK COMPENSATION

      The Company accounts for stock-based compensation using the intrinsic
value method. Compensation cost for stock options is measured as the excess, if
any, of the quoted market price of the Company's stock at the date of the grant
over the amount an employee must pay to acquire the stock. Note K to the
Consolidated Financial Statements contains a summary of the pro forma effects to
reported net income and earnings per share as if the Company had elected to
recognize the compensation cost based on the fair value of the options granted
at grant date.

INCOME PER COMMON SHARE

      Basic earnings per share excludes any dilutive effects of options. Diluted
earnings per share includes the dilutive effect of stock options, which is
computed using the treasury stock method during the periods such options were
outstanding. A reconciliation of the common shares used in the computations of
income per common and common equivalent shares is presented in Note L to the
Consolidated Financial Statements.

FOREIGN CURRENCY TRANSLATION

      The U.S. dollar is the designated functional currency for all of the
Company's foreign operations, except for those in the United Kingdom and Norway,
where the British Pound and the Norwegian Kroner are the functional currency.
The cumulative translation effects of translating balance sheet accounts from
the functional currency into the U.S. dollar at current exchange rates are
included as a separate component of shareholders' equity.

USE OF ESTIMATES

      Management is required to make estimates and assumptions that affect the
amounts reported in the financial statements and accompanying notes. Actual
results could differ from those estimates.

RECLASSIFICATIONS

      Certain previously reported financial information has been reclassified to
conform to the current year's presentation.

REVENUE RECOGNITION

      Revenues are recognized when finished products are shipped to unaffiliated
customers or services have been rendered with appropriate provisions for
uncollectible accounts.

DERIVATIVE FINANCIAL INSTRUMENTS

      The Company manages its exposure to variable interest rate financing
arrangements by entering into interest rate contracts, which provide for the
Company to pay a fixed rate of interest and receive a variable rate of interest
over the term of the contracts. The differential to be paid or received as a
result of the changes in the prevailing interest rates are accrued and
recognized as an adjustment of interest expense related to the debt. The net
amount receivable or payable under the interest rate contracts are included in
other assets or liabilities. Gains or losses on termination of interest rate
swap agreements are deferred as an adjustment to the carrying amount of the debt
and amortized to interest expense over the remaining term of the original
contract.

START-UP COSTS

      In April 1998, the American Institute of Certified Public Accounts issued
Statement of Position 98-5, REPORTING THE COSTS OF START-UP ACTIVITIES ("SOP
98-5"), which requires that costs related to start-up activities be expensed as
incurred. Prior to 1999, the Company capitalized those costs incurred in
connection with opening a new production facility. The Company adopted the
provisions of the SOP 98-5 in its financial statements for the year ended
December 31, 1999. The effect of adoption of SOP 98-5 was to record a charge for
the cumulative effect of an accounting change of $5.8 million ($0.43 per share),
net of taxes of $3.9 million, to expense costs that had been

                                      F-10
<PAGE>
previously capitalized prior to 1999. Had SOP 98-5 been adopted as of January 1,
1998, the reported net income and earnings per share for 1998 would not have
materially changed.

NEW ACCOUNTING PRONOUNCEMENTS

      In June 1998, the Financial Accounting Standards Board issued Statement
No. 133, ACCOUNTING FOR DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES, which is
required to be adopted in years beginning after June 15, 2001. Because of the
Company's minimal use of derivatives, management does not anticipate that the
adoption of the new Statement will have a significant effect on earnings or the
financial position of the Company.


NOTE C  -- RESTRUCTURING AND SPECIAL CHARGES

      During the fourth quarter of 1999, the Company implemented a strategic
restructuring program to refocus its effort in the energy services business.
This program will concentrate the Company's efforts on developing its oil and
gas services business and will sell or consolidate non-core chemical operations.
To achieve this strategy, the Company is actively pursuing the disposition of
its micronutrients business, as well as several smaller chemicals-related
operations. Additionally, the Company has implemented plans to exit certain
product lines and businesses which are not core to its new strategic direction.
The remaining chemicals business will consist of a commodity products based
operations, which significantly supports the energy service markets. The Company
has also embarked on an aggressive program to reorganize its overhead structure
to reduce costs and improve operating efficiencies in support of the energy
services operations.

      As a result of this change in strategy, the Company recorded a $2.3
million, pretax, restructuring charge in the fourth quarter of 1999, as detailed
below:
                                                  DECEMBER 31, 1999
                                              ------------------------
                                                   (IN THOUSANDS)
                                                             LIABILITY
                                               EXPENSE        BALANCE
                                              --------       ---------
      Involuntary termination costs.........   $ 1,170        $ 1,170
      Contractual costs.....................       760            760
      Exit costs............................       390            390
                                              --------       --------
                                               $ 2,320        $ 2,320
                                               =======        =======

Involuntary termination costs consist of severance costs associated with the
termination of six management level employees associated with the Company's
restructuring. Contractual costs include obligations triggered in two chemicals
product lines when the Company decided to exit these businesses. The remaining
exit costs are additional liabilities realized by exiting certain portions of
the specialty chemicals business. Of the total restructuring charge,
approximately $1.8 million is associated with the Chemicals Division, $0.1
million with the Oil & Gas Services Division and $0.6 million with corporate
administrative activities. The majority of the costs are expected to be paid
within the next 18 months and will be funded using cash flow from operations.
These restructuring activities may result in additional expenses to be incurred
in 2000, which the Company is unable to quantify at this time.

      In March 1999, the Company was verbally notified of the early termination
of a significant liquid calcium chloride contract. The Company was subsequently
notified in writing. Under the terms of the contract, the Company is required to
terminate its operations at that location and vacate the facility within two
years from the date of written notification. The Company is also required to
remove all of its equipment and fixtures, at its own cost. As a result of the
early termination of the contract, the Company recorded a first quarter
impairment of these Chemicals Division assets of approximately $1.4 million.
These assets are currently in service through the end of the contract.

      Also during the first quarter of 1999, the Company committed to certain
actions that resulted in the impairment of other plant assets in the Company's
Chemicals Division. As a result of increased production volumes achieved at the
new calcium chloride dry plant in Lake Charles, Louisiana, the Company no longer
needs the previously existing dry plant and has subsequently dismantled it,
resulting in an impairment charge of approximately $1.8 million. In addition,
the Company recently completed modifications on the West Memphis, Arkansas
bromine plant. The assets related to the old zinc bromide production unit, which
had a carrying value of approximately $0.4 million, were taken out of service

                                      F-11
<PAGE>
in the first quarter. The abandoned assets of both plant facilities were written
off during the first quarter. Finally, the Company recognized the impairment of
certain micronutrients' assets totaling approximately $1.1 million. These assets
were deemed impaired with the acquisition of the WyZinCo Company and the CoZinCo
assets and were written off during the first quarter.


NOTE D  -- ACQUISITIONS AND DISPOSITIONS

      In January 1999, the Company acquired WyZinCo, Inc., CoZinCo Sales, Inc.
and certain assets of CoZinCo, Inc. for approximately $11.7 million in cash and
notes. The acquisition, which was accounted for under the purchase method of
accounting, was funded primarily through the Company's credit facility. The
excess of purchase price over the fair value of assets acquired was
approximately $8.3 million.

      In March 1999, the Company sold its corporate headquarters building
realizing a pretax gain of approximately $6.7 million. The Company subsequently
signed a ten-year lease agreement for space within the building.

      In July 1999, the Company sold its Process Technologies business for $38.8
million. Of these proceeds, $2.0 million was escrowed and could be used to
satisfy certain claims asserted by the buyer within the first year after the
sale. The escrowed amounts are classified as restricted cash in the accompanying
financial statements. The Company does not anticipate any such claims. The sale,
which was effective May 1, generated a pretax gain of $29.6 million. The
proceeds were used to reduce long-term bank debt. TETRA Process Technologies
("TPT") is in the waste and potable water treatment business and was operated as
part of the Chemicals Division. It had sales of $4.1 million in 1999, $15.6
million in 1998 and $11.4 million in 1997.

      During the third quarter of 1998, the Company acquired from Cargill, Inc.
the assets of its calcium chloride facility located near Amboy, California. The
business, which utilizes solar evaporation and other techniques to produce three
grades of calcium chloride from underground brine reserves, will be integrated
into the Chemicals Division. The Company paid approximately $2.1 million cash
for the assets of the facility. The excess purchase price over the fair market
value of the assets acquired was approximately $2.0 million.

      All acquisitions by the Company have been accounted for as purchases, with
operations of the companies and businesses acquired included in the accompanying
consolidated financial statements from their respective dates of acquisition.
The purchase price has been allocated to the acquired assets and liabilities
based on a preliminary determination of their respective fair values. The excess
of the purchase price over the fair value of the net assets acquired is included
in goodwill and amortized over periods which do not exceed forty years. Pro
forma information for these acquisitions has not been presented as such amounts
are not material.


NOTE E  --  LONG-TERM DEBT AND OTHER BORROWINGS

      Long-term debt consists of the following:
                                                              DECEMBER 31,
                                                         ------------  -------
                                                            (IN THOUSANDS)
                                                           1999        1998
                                                         ---------   ---------
General purpose unsecured, revolving line-of-credit
  for $120 million with interest at LIBOR
  plus .75 - 2.75%.  Borrowings as of 12/31/99
  accrued interest at LIBOR plus 2.25%. ...............   $ 74,000   $ 109,000

Other .................................................      1,230          --
                                                         ---------   ---------
                                                            75,230     109,000
Less current portion...................................     (1,230)         --
                                                         ---------   ----------

   Total long-term debt................................   $ 74,000   $ 109,000
                                                          ========   =========

                                      F-12
<PAGE>



      Scheduled maturities for the next five years and thereafter as of December
31, 1999 are as follows (in thousands):

            2000................................$   1,230
            2001................................       --
            2002................................   74,000
                                                ---------
                                                 $ 75,230
                                                =========

      As of December 31, 1999, the Company has $1.6 million in letters of credit
and $75.2 million in long-term debt outstanding against a $120 million
line-of-credit, leaving a net availability of $43.2 million. Beginning March 31,
2000, the maximum borrowing amount of this line will decrease $5 million per
quarter until its maturity date of March 10, 2002. TETRA's credit facility,
which is unsecured, is subject to common financial ratio covenants. These
include, among others, a debt to EBITDA ratio, a fixed charge coverage ratio, a
net worth minimum and dollar limits on the total amount of capital expenditures
and acquisitions the Company may undertake in any given year. The Company pays a
commitment fee on unused portions of the line and a LIBOR-based interest rate
which decreases as the financial ratios increase. The Company is not required to
maintain compensating balances. The covenants also included certain restrictions
on the Company for the sale of assets. The Company obtained an amendment to the
covenants authorizing the sale of its corporate headquarters building and the
assets of TETRA Process Technologies.

      As of December 31, 1999, the Company was in violation of certain financial
covenants of its credit agreement but has received a waiver agreement from the
banks. The Company has a binding commitment from the banks to amend its current
credit facility. This amended credit line will include an asset-based component
of up to $50 million and a $50 million term component secured with property and
equipment. The Company believes this new credit facility will meet all its
capital and working capital requirements. The new financial covenants, which are
effective December 31, 1999, are consistent with its 2000 business plan.

      In September 1997, the Company entered into two interest rate swap
agreements, each with a nominal amount of $20,000,000, which are effective
January 2, 1998 and expire on January 2, 2003. The interest rate swap agreements
provide for the Company to pay interest at a fixed rate of approximately 6.4%
(annual rate) every three months, beginning April 2, 1998 and requires the
issuer to pay the Company on a floating rate based on LIBOR. The swap
transactions can be canceled by the Company through payment of a cancellation
fee, which is based upon prevailing market conditions and remaining life of the
agreement. The estimated fair value of the swap transactions at December 31,
1999 was higher than the carrying value by $0.2 million.


NOTE F  -- LEASES

      The Company leases automobiles and trucks, transportation equipment,
office space, and machinery and equipment. The automobile and truck leases,
which are for three and five years and expire at various dates through 2003, are
classified as capital leases. The machinery and equipment leases, which vary
from three to five year terms and expire at various dates through 2010, are also
classified as capital leases. The office leases, which vary from one to ten year
terms expiring at various dates through 2001 and are renewable for three and
five year periods at similar terms, are classified as operating leases.
Transportation equipment leases expire at various dates through 2002 and are
classified as operating leases. The automobile and truck leases, office leases,
and machinery and equipment leases require the Company to pay all maintenance
and insurance costs.

                                      F-13
<PAGE>
      Property, plant, and equipment includes the following amounts for leases
that have been capitalized:

                                                        DECEMBER 31,
                                                 -------------------------
                                                       (IN THOUSANDS)
                                                  1999              1998
                                                 -------           -------
Automobiles and trucks .....................     $ 4,419           $ 3,658
Less accumulated amortization ..............      (2,073)           (1,424)
                                                 -------           -------
                                                 $ 2,346             2,234
                                                 =======           =======

Machinery and equipment ....................         108               260
Less accumulated amortization ..............         (30)             (133)
                                                 -------           -------
                                                 $    78           $   127
                                                 =======           =======

      Amortization of these assets is computed using the straight-line method
over the terms of the leases and is included in depreciation and amortization
expense.

      Future minimum lease payments by year and in the aggregate, under capital
leases and noncancellable operating leases with terms of one year or more
consist of the following at December 31, 1999:

                                                  CAPITAL      OPERATING
                                                   LEASES       LEASES
                                                  -------      ---------
                                                       (IN THOUSANDS)

2000 .........................................    $ 1,109       $ 3,679
2001 .........................................        631         3,013
2002 .........................................        432         2,274
2003 .........................................         70         1,742
2004 .........................................          2         1,279
                                                  -------       -------
Total minimum lease payments .................      2,244       $11,987
                                                                =======
Amount representing interest .................       (216)
                                                  -------
Present value of net minimum lease payments ..      2,028
Less current portion .........................     (1,002)
                                                  -------

     Total long-term portion .................    $ 1,026
                                                  =======


      Rental expense for all operating leases was $5,410,000, $4,335,000 and
$3,598,000 in 1999, 1998 and 1997, respectively.

                                      F-14
<PAGE>
NOTE G  -- INCOME TAXES

      The income tax provision for years ended December 31, 1999, 1998 and 1997
consisted of the following:

                                                  YEAR ENDED DECEMBER 31,
                                          --------------------------------------
                                                      (IN THOUSANDS)
                                           1999            1998           1997
                                          -------         -------        -------
CURRENT
  Federal ........................        $ 3,902         $   920        $ 2,860
  State ..........................            254             100            402
  Foreign ........................          1,558           2,226          2,668
                                          -------         -------        -------
                                            5,714           3,246          5,930

DEFERRED
  Federal ........................          5,786           2,420          3,090
  State ..........................            392              52            146
  Foreign ........................         (2,017)           --             --
                                          -------         -------        -------
                                            4,161           2,472          3,236

  Total tax provision ............        $ 9,875         $ 5,718        $ 9,166
                                          =======         =======        =======


      A reconciliation of the provision for income taxes computed by applying
the federal statutory rate for the years ended December 31, 1999, 1998 and 1997
to income before income taxes and the reported income taxes is as follows:

                                                  1999        1998        1997
                                                 -------     -------     -------
                                                         (IN THOUSANDS)
Income tax provision computed at statutory
  federal income tax rates ..................    $ 9,061     $ 4,970     $ 8,086
State income taxes (net of federal benefit) .        420          66         261
Permanent differences .......................        630         391         359
Impact of International Operations ..........       (694)        320         386
Other .......................................        458         (29)         74
                                                 -------     -------     -------
Total tax provision .........................    $ 9,875     $ 5,718     $ 9,166
                                                 =======     =======     =======


      Deferred income taxes reflect the net tax effects of temporary differences
between the carrying amounts of assets and liabilities for financial reporting
purposes and the amounts used for income tax purposes. Significant components of
the Company's deferred tax assets and liabilities as of December 31, 1999 and
1998 are as follows:

      Deferred Tax Assets:                              1999             1998
                                                       -------          -------
                                                            (IN THOUSANDS)

Tax inventory over book ......................         $   842          $ 1,638
Allowance for doubtful accounts ..............             468              315
Accruals .....................................           1,333            1,094
Net operating and capital loss
  carryforward ...............................             121              960
Tax credit carryforward ......................           2,604            1,044
Foreign Tax credit carryforward ..............             753              550
Restructuring charge .........................             858             --
All other, net ...............................             636              624
                                                       -------          -------
    Total deferred tax assets ................           7,615            6,225
Valuation reserve ............................            (227)            (227)
                                                       -------          -------
    Net deferred tax assets ..................         $ 7,388          $ 5,998
                                                       =======          =======

                                      F-15
<PAGE>
      Deferred Tax Liabilities:                           1999            1998
                                                         -------         -------
                                                            (IN THOUSANDS)

Tax over book depreciation .....................         $18,883         $16,670
Goodwill amortization ..........................           1,688           1,516
Accounts receivable mark-to-market .............             511             839
All other ......................................             615             633
                                                         -------         -------
Total deferred tax liability ...................          21,697          19,658
                                                         -------         -------

Net deferred tax liability......................         $14,309         $13,660
                                                         =======         =======

      The Company has net operating loss carryforward of $120,000 for U.S.
federal income tax purposes which, if not utilized, will begin to expire in
2010. The Company also has alternative minimum tax credit carryforwards of
approximately $250,000, which may be carried forward indefinitely and an asset
tax carryforward associated with its Mexican subsidiary of approximately $2.1
million, a portion of which expires annually over the next ten years. The
Company has recorded a valuation allowance of $227,000 at December 31, 1999 and
1998 for deferred tax assets, which are not considered realizable.


NOTE H  --  ACCRUED LIABILITIES

      Accrued liabilities are detailed as follows:

                                                         YEAR ENDED DECEMBER 31,
                                                         -----------------------
                                                           1999           1998
                                                          -------        -------
                                                              (IN THOUSANDS)

Compensation and employee benefits ...............        $ 3,798        $ 3,297
Interest expense payable .........................            605          1,134
Plant operating costs ............................            246            481
Professional fees ................................            636            289
Restructuring charges ............................          2,320           --
Taxes payable ....................................          5,050            870
Transportation and distribution costs ............            788            867
Other accrued liabilities ........................          4,286          4,398
                                                          -------        -------
                                                          $17,729        $11,336
                                                          =======        =======


NOTE I  --  COMMITMENTS AND CONTINGENCIES

      The Company and its subsidiaries are named defendants in several lawsuits
and respondents in certain governmental proceedings arising in the ordinary
course of business. While the outcome of lawsuits or other proceedings against
the Company cannot be predicted with certainty, management does not expect these
matters to have a material adverse impact on the financial statements.


NOTE J  --  CAPITAL STOCK

      The Company's Restated Certificate of Incorporation authorizes the Company
to issue 40,000,000 shares of common stock, par value $.01 per share, and
5,000,000 shares of preferred stock, no par value. The voting, dividend and
liquidation rights of the holders of common stock are subject to the rights of
the holders of preferred stock. The holders of common stock are entitled to one
vote for each share held. There is no cumulative voting. Dividends may be
declared and paid on common stock as determined by the Board of Directors,
subject to any preferential dividend rights of any then outstanding preferred
stock.

                                      F-16
<PAGE>
      The Board of Directors of the Company is empowered, without approval of
the stockholders, to cause shares of preferred stock to be issued in one or more
series and to establish the number of shares to be included in each such series
and the rights, powers, preferences and limitations of each series. Because the
Board of Directors has the power to establish the preferences and rights of each
series, it may afford the holders of any series of preferred stock preferences,
powers and rights, voting or otherwise, senior to the rights of holders of
common stock. The issuance of the preferred stock could have the effect of
delaying or preventing a change in control of the Company. The Board of
Directors has no present plans to issue any of the preferred stock.

      Upon dissolution or liquidation of the Company, whether voluntary or
involuntary, holders of common stock will be entitled to receive all assets of
the Company available for distribution to its stockholders, subject to any
preferential rights of any then outstanding preferred stock.


NOTE K --  STOCK OPTION PLANS

      The Company has various stock option plans which provide for the granting
of options for the purchase of the Company's common stock and other
performance-based awards to officers, key employees, non employees and directors
of the Company. Incentive stock options generally vest over a five year period
and are exercisable for periods up to ten years. The TETRA Technologies, Inc.
1990 Stock Option Plan (the "1990 Plan") was initially adopted in 1985 and
subsequently amended to change the name and the number and type of options that
could be granted.

      In 1997 and 1998, the Company granted performance stock options under the
1990 Plan to certain executive officers. These options have an exercise price of
$25.00 per share and vest in full in no less than five years, subject to earlier
vesting as follows: fifty percent of each such option vests immediately if the
market value per share is equal to or greater than $37.50 for a period of at
least 20 consecutive trading days; and the remaining fifty percent vests
immediately if the market value per share is equal to or greater than $50.00 for
a period of at least 20 consecutive trading days. These options are immediately
exercisable upon vesting; provided, however, that no more than 100,000 shares of
Common Stock may be exercised by any individual after vesting in any 90 day
period, except in the event of death, incapacity or termination of employment of
the holder or the occurrence of a Corporation Change. Such options must be
exercised within three years of vesting or they expire. At December 31, 1999,
950,000 shares of common stock have been reserved for grants, of which 350,000
were available for future grants.

      In 1993, the Company adopted the TETRA Technologies, Inc. Director Stock
Option Plan (the "Director's Plan"). The purpose of the Directors' Plan is to
enable the Company to attract and retain qualified individuals who are not
employees of the Company to serve as directors. In 1996, the Directors' Plan was
amended to increase the number of shares issuable under automatic grants
thereunder. In 1998, the Company adopted the TETRA Technologies, Inc. 1998
Director Stock Option Plan (the "1998 Directors' Plan"). The purpose of the 1998
Directors' Plan is to enable the Company to attract and retain qualified
individuals to serve as directors of the Company and to align their interests
more closely with the Company's interests. The 1998 Directors' Plan is funded
with treasury stock of the Company.

      The Company also has a plan designed to award incentive stock options to
non-executive employees and consultants who are key to the performance of the
Company. At December 31, 1999, 500,000 shares of common stock have been reserved
for grants, of which 417,730 were available for future grants.

      Effective December 11, 1998, the Company's Board of Directors approved a
stock option exchange program whereby all outstanding 1996 options, other than
directors options, could be exchanged for 70% of as many shares, and all 1997
and 1998 options and all directors options could be exchanged for 50% of as many
shares. The exercise price of the new options received was $10.188 per share.
The new options issued are vested to the same extent as the old options, on a
prorata basis, and the vesting period will continue unchanged. The term of the
new options is ten years from December 11, 1998. The exchange program was
offered to substantially all employee option holders and directors who received
grants in 1996, 1997 and 1998, other than the performance-based options made to
executive officers. This program reduced the number of options outstanding by
approximately 516,000.

                                      F-17
<PAGE>
      The following is a summary of stock option activity for the years ended
December 31, 1997, 1998 and 1999:


                                                    SHARES      WEIGHTED AVERAGE
                                                 UNDER OPTION     OPTION PRICE
                                                    (000'S)         PER SHARE
                                                 ------------   ----------------
Outstanding at December 31, 1996 ..............      2,121            12.97

  Options granted .............................        732            24.36
  Options canceled ............................        (26)           14.25
  Options exercised ...........................       (272)            9.42
                                                    ------
Outstanding at December 31, 1997 ..............      2,555            16.60

  Options granted .............................      1,415            14.76
  Options canceled ............................     (1,459)           19.13
  Options exercised ...........................       (134)           10.71
                                                    ------
Outstanding at December 31, 1998 ..............      2,377           $14.28

  Options granted .............................        144            10.02
  Options canceled ............................       (283)           14.55
  Options exercised ...........................        (13)            7.59
                                                    ------
Outstanding at December 31, 1999 ..............      2,225            13.96
                                                    ======

(In thousands, except per share amounts)
<TABLE>
<CAPTION>
                                                          1999      1998     1997
                                                          ----      ----     ----
<S>                                                       <C>      <C>      <C>
1990 TETRA TECHNOLOGIES, INC. EMPLOYEE PLAN (AS AMENDED)
- --------------------------------------------------------
      Maximum number of shares authorized for issuance    3,950    3,950    3,950
      Shares reserved for future grants ..............    1,030      824      867
      Shares exercisable at year end .................      948      848      803
      Weighted average exercise price of shares
        exercisable at year end ......................    $9.58    $9.69   $11.05

DIRECTOR STOCK OPTION PLANS
- ---------------------------
      Maximum number of shares authorized for issuance      175      175      100
      Shares reserved for future grants ..............       86      101       26
      Shares exercisable at year end .................       57       47       68
      Weighted average exercise price of shares
        exercisable at year end ......................   $10.10    $9.93   $16.72

ALL OTHER PLANS
- ---------------
      Maximum number of shares authorized for issuance      785      785      785
      Shares reserved for future grants ..............      418      467      465
      Shares exercisable at year end .................      269      209      198
      Weighted average exercise price of shares
        exercisable at year end ......................   $10.35   $10.27   $16.92

</TABLE>

                                      F-18
<PAGE>
                        OPTIONS OUTSTANDING               OPTIONS EXERCISABLE
                 --------------------------------------   ----------------------
                         WEIGHTED AVERAGE   WEIGHTED
    RANGE OF                REMAINING        AVERAGE            WEIGHTED AVERAGE
 EXERCISE PRICE  SHARES  CONTRACTED LIFE EXERCISE PRICE  SHARES  EXERCISE PRICE
- ---------------- ------  --------------- --------------  ------ ----------------
 $5.88 to $9.80     560       4.7          $    8.01       514    $    7.97
$10.19 to $16.75  1,041       8.3              10.59       739        10.62
$21.06 to $25.00    624       7.8              24.92        21        23.82
                  -----                                  -----
                  2,225       7.3          $   13.96     1,274    $    9.76
                  =====                                  =====



      Assuming that TETRA had accounted for its stock-based compensation using
the alternative fair value method of accounting under FAS No. 123 and amortized
the fair value to expense over the options vesting period, net income and
earnings per share would have been as follows (in thousands except per share
amounts):


<TABLE>
<CAPTION>
                                                    YEAR ENDED DECEMBER 31,
                                              ------------------------------------
                                                        (IN THOUSANDS)
                                                1999         1998         1997
                                              ---------    ---------    ----------
<S>                                           <C>          <C>          <C>
Net Income - as reported .................    $  10,232    $   8,898    $   13,936
                                              =========    =========    ==========
Net Income - pro forma ...................        8,144        7,369        12,272
                                              =========    =========    ==========

Net Income per share - as reported .......         0.75         0.66          1.05
                                              =========    =========    ==========
Net Income per share - pro forma .........         0.60         0.54          0.92
                                              =========    =========    ==========

Net Income per diluted share - as reported         0.75         0.64          0.98
                                              =========    =========    ==========
Net Income per diluted share - pro forma .    $    0.60    $    0.53    $     0.86
                                              =========    =========    ==========
</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;
expected stock price volatility 43.3%, expected life of options 5.0 to 6.0
years, risk-free interest rate 6.00% and no expected dividend yield. The
weighted average fair value of options granted during 1999, 1998 and 1997 was
$3.69, $6.62 and $12.95 per share, respectively. The pro forma effect on net
income for 1998 is not representative of the pro forma effect on net income in
future years because of the potential of accelerated vesting of certain options
and it does not take into consideration pro forma compensation expense related
to grants made prior to 1995.

NOTE L -- 401(K) PLAN

      The Company has a 401(k) profit sharing and savings plan (the "Plan") that
covers substantially all employees and entitles them to contribute up to 22% of
their annual compensation, subject to maximum limitations imposed by the
Internal Revenue Code. The Company matches 50% of each employee's contribution
up to 6% of annual compensation, subject to certain limitations as outlined in
the Plan. In addition, the Company make discretionary contributions which are
allocable to participants in accordance with the Plan.

                                      F-19
<PAGE>
NOTE M  --  INCOME PER SHARE

      The following is a reconciliation of the common shares outstanding with
the number of shares used in the computations of income per common and common
equivalent share:

<TABLE>
<CAPTION>
                                                          YEAR ENDED DECEMBER 31,
                                                        --------------------------
                                                              (IN THOUSANDS)
                                                         1999      1998      1997
                                                        ------    ------    ------

<S>                                                     <C>       <C>       <C>
Number of weighted average common shares outstanding    13,524    13,561    13,297
Assumed exercise of stock options ..................        52       433       892
                                                        ------    ------    ------
Average diluted shares outstanding .................    13,576    13,994    14,189
                                                        ======    ======    ======
</TABLE>


NOTE N  -- INDUSTRY SEGMENTS AND GEOGRAPHIC INFORMATION

      In 1999, the Company managed its business in two segments: Oil & Gas
Services and Chemicals. The Oil & Gas Services segment provides a broad range of
products and services to its customers in the energy industry. The Chemicals
segment manufactures and markets a variety of commercial products which are
produced from low cost feedstocks.

      During the fourth quarter of 1999, the Company implemented a strategic
restructuring program to refocus its effort in the energy services business.
This program will concentrate the Company's efforts on developing its oil and
gas services business and will sell or consolidate non-core chemical operations.
To achieve this strategy, the Company is actively pursuing the disposition of
its micronutrients business, as well as several smaller chemicals-related
operations. Additionally, the Company has implemented plans to exit certain
product lines and businesses which are not core to its new strategic direction.
The remaining chemicals business will consist of a commodity products based
operations which significantly supports the energy service markets.

      The Company evaluates performance and allocates resources based on profit
or loss from operations before income taxes and non-recurring charges. The
accounting policies of the reportable segments are the same as those described
in the summary of significant accounting policies. Transfers between segments,
as well as geographic areas, are priced at the estimated fair value of the
products or services as negotiated between the two operating units. Other
includes corporate expenses, nonrecurring charges and elimination of
intersegment revenues.

                                      F-20
<PAGE>
      Summarized financial information concerning the business segments follows:

<TABLE>
<CAPTION>
                                            OIL & GAS
(IN THOUSANDS)                               SERVICES   CHEMICALS
                                             DIVISION    DIVISION     OTHER        CONSOLIDATED
                                             --------    --------    --------      ------------
1999 SEGMENT DETAIL
<S>                                          <C>         <C>              <C>        <C>
Revenues from external customers:
   Products .............................    $ 60,542    $ 79,807    $   --          $140,349
   Services and Rentals .................      59,813      15,139        --            74,952
Intersegmented revenues .................         196      13,206     (13,402)           --
                                             --------    --------    --------        --------
   Total revenues .......................     120,551     108,152     (13,402)        215,301
                                             --------    --------    --------        --------

Depreciation and amortization ...........       7,799       8,270         688          16,757
Interest Expense ........................           9          45       7,702           7,756
Income before income taxes and
   cumulative effect of accounting change       7,179       4,265      14,445(1)       25,889

Total Assets ............................     131,262     151,073       8,301         290,636

Capital Expenditures ....................    $  4,269    $  8,650    $    310        $ 13,229

<CAPTION>
(1)   Includes gain on the sale of administrative building of $6,731, gain on
      the sale of the TPT business of $29,629, special charges of $4,745 and a
      restructuring charge of $2,320, of which $1,660 is associated with the
      Chemicals Division, $75 with the Oil & Gas Services Division and $585 with
      corporate administration.

1998 SEGMENT DETAIL
Revenues from external customers:
   Products ............................    $  85,542    $  61,858    $     --       $ 147,400
   Services and Rentals ................       62,866       28,202          --          91,068
Intersegmented revenues ................          616       16,635       (17,251)         --
                                            ---------    ---------     ---------     ---------
   Total revenues.......................      149,024      106,695       (17,251)      238,468
                                            =========    =========     =========     =========

Depreciation and amortization ..........        7,404        7,458         1,361        16,223
Interest Expense .......................           11          213         6,234         6,458
Income before Taxes ....................       19,397        8,234       (13,015)       14,616
Total Assets ...........................      141,334      162,647         7,027       311,008
Capital Expenditures ...................    $  21,086    $  22,978     $   1,310     $  45,374
</TABLE>


                                      F-21
<PAGE>
<TABLE>
<CAPTION>
                                     OIL & GAS
(IN THOUSANDS)                       SERVICES   CHEMICALS
                                     DIVISION    DIVISION     OTHER     CONSOLIDATED
                                     --------    --------    --------   ------------
<S>                                  <C>         <C>            <C>       <C>
1997 SEGMENT DETAIL
Revenues from external customers:
   Products .....................    $ 92,704    $ 55,223    $   --       $147,927
   Services and Rentals .........      55,094      16,392        --         71,486
Intersegmented revenues .........        --        15,356     (15,356)        --
                                     --------    --------    --------     --------
   Total revenues ...............     147,798      86,971     (15,356)     219,413
                                     ========    ========    ========     ========

Depreciation and amortization ...       5,072       5,733         770       11,575
Interest Expense ................          60       1,046       2,199        3,305
Income before Taxes .............      30,098       3,322     (10,318)      23,102
Total Assets ....................     123,371     133,056       7,365      263,792
Capital Expenditures ............    $ 36,227    $ 18,169    $  1,071     $ 55,467
</TABLE>


      Summarized financial information concerning the geographic areas in which
the Company operated at December 31, 1999, 1998 and 1997 are presented below:

                                        1999          1998          1997
                                      ---------     ---------     ---------
Revenues from external customers:
   U.S ...........................    $ 168,192     $ 189,853     $ 176,125
   Europe and Africa .............       21,011        24,112        21,409
   Other .........................       26,098        24,503        21,879
                                      ---------     ---------     ---------
          Total ..................      215,301       238,468       219,413

Transfer between geographic areas:
   U.S ...........................          596         1,252         5,301
   Europe and Africa .............         --            --             972
   Other .........................         --            --            --
   Eliminations ..................         (596)       (1,252)       (6,273)
                                      ---------     ---------     ---------
Total Revenues ...................      215,301       238,468       219,413
                                      =========     =========     =========

Identifiable Assets:
   U.S ...........................      249,154       264,811       221,113
   Europe and Africa .............       18,779        22,797        24,941
   Other .........................       42,726        42,875        36,709
   Eliminations ..................      (20,023)      (19,475)      (18,971)
                                      ---------     ---------     ---------
Total ............................    $ 290,636     $ 311,008     $ 263,792
                                      =========     =========     =========


      In 1999 and 1998, no customer accounted for more than 10% of consolidated
revenues. In 1997, one customer accounted for more than 10% of consolidated
revenues with revenues of $22 million.

                                      F-22
<PAGE>
NOTE O  -- QUARTERLY FINANCIAL INFORMATION (UNAUDITED)

      Summarized quarterly financial data for 1999 and 1998 are as follows (in
thousands, except per share data):

<TABLE>
<CAPTION>
                                                                 THREE MONTHS ENDED 1999
                                             --------------------------------------------------------------
                                              MARCH 31          JUNE 30        SEPTEMBER 30     DECEMBER 31
                                             ----------        ----------      ------------     -----------
<S>                                          <C>               <C>              <C>            <C>
Total Revenue ...........................    $   57,997        $   50,306       $   52,671     $   54,327

Gross Profit ............................        14,144            10,112           11,687          9,994

Income (loss) before cumulative effect of
   accounting change ....................         2,103(1)         16,494(2)           233         (2,816)(3)

Cumulative effect of accounting change
   (Net of income tax effect) ...........        (5,782)             --               --             --
                                             ----------        ----------       ----------     ----------

Net Income (loss)........................        (3,679)           16,494              233         (2,816)
                                             ==========        ==========       ==========     ==========

Net Income per share before cumulative
   effect of accounting change ..........    $     0.16        $     1.22       $     0.02     ($    0.21)
Cumulative effect of accounting change ..    ($    0.43)             --               --             --
                                             ----------        ----------       ----------     ----------
Net Income per share.....................         ($0.2)       $     1.22       $     0.02     ($    0.21)
                                             ==========        ==========       ==========     ==========


Net Income per diluted share before
   cumulative effect accounting change ..    $     0.16        $     1.22       $     0.02     ($    0.21)
Cumulative effect of accounting change ..    ($    0.43)             --               --             --
                                             ----------        ----------       ----------     ----------
Net Income per diluted share ............    ($    0.27)       $     1.22       $     0.02     ($    0.21)
                                             ==========        ==========       ==========     ==========
</TABLE>


(1) Includes a special charge of $4.745 and gain on sale of administration
    building of $6,731.
(2) Includes gain on sale of business of $29,629.
(3) Includes restructuring charges of $2,320.

<TABLE>
<CAPTION>
                                                                 THREE MONTHS ENDED 1998
                                              -----------------------------------------------------------
                                               MARCH 31        JUNE 30         SEPTEMBER 30   DECEMBER 31
                                              ---------        -------         ------------   -----------

<S>                                             <C>            <C>               <C>             <C>
Total Revenue ...............................   $67,336        $63,787           $52,314         $55,031

Gross Profit ................................    18,246         16,917            12,719          12,553

Net Income ..................................     3,937          3,714               391             856

Net earnings per share ......................   $  0.29        $  0.27           $  0.03         $  0.06

Net earnings per diluted share ..............   $  0.28        $  0.26           $  0.03         $  0.06
</TABLE>


                                      F-23
<PAGE>
NOTE P - SHAREHOLDERS RIGHTS PLAN

      On October 27, 1998, the Board of Directors adopted a stockholder rights
plan (the "Rights Plan") designed to assure that all of the Company's
shareholders receive fair and equal treatment in the event of any proposed
takeover of the Company. The Rights Plan helps to guard against partial tender
offers, open market accumulations and other abusive tactics to gain control of
the Company without paying an adequate and fair price in any takeover attempt.
The Rights are not presently exercisable and are not represented by separate
certificates. The Company is currently not aware of any effort of any kind to
acquire control of the Company.

      Terms of the Rights Plan provide for a dividend distribution of one
Preferred Stock Purchase Right for each outstanding share of Common Stock to
holders of record at the close of business on November 6, 1998. The Rights Plan
would be triggered if an acquiring party accumulates or initiates a tender offer
to purchase 20% or more of the Company's Common Stock and would entitle holders
of the Rights to purchase either the Company's stock or shares in an acquiring
entity at half of market value. Each Right entitles the holder thereof to
purchase 1/100 of a share of Series One Junior Participating Preferred Stock for
$50.00 per share, subject to adjustment. The Company would generally be entitled
to redeem the Rights at $.01 per Right at any time until the tenth day following
the time the Rights become exercisable. The Rights will expire on November 6,
2008.

      For a more detailed description of the Rights Plan, refer to the Company's
Form 8-K filed with the Securities and Exchange Commission on October 28, 1998.


NOTE Q  -- ACCOUNTING FOR PROCESS TECHNOLOGY CONTRACTS

      The Company did not have any percentage of completion contracts at
December 31, 1999. The following summarizes percentage of completion of Process
Technology contracts in progress at December 31, 1998.


                                                          (IN THOUSANDS)
                                                               1998
                                                             --------
      Costs and estimated earnings incurred
        on contracts in progress.................            $ 21,012

      Less applicable billings...................             (16,327)
                                                             --------

                                                             $  4,685
                                                             ========

      These amounts are included in the accompanying consolidated balance sheets
as follows:

                                                          (IN THOUSANDS)
                                                               1998
                                                             -------
      Costs and estimated earnings in excess of
        billings on incomplete contracts........             $ 5,641

      Billings in excess of costs and estimated
        earnings on incomplete contracts.......                  (95)
                                                             -------

                                                             $ 4,685
                                                             =======


      Receivables under contractual retainage provisions aggregated
approximately $796,120 at December 31, 1998.

                                      F-24
<PAGE>
                    TETRA TECHNOLOGIES, INC. AND SUBSIDIARIES
                 SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS
                                 (IN THOUSANDS)

<TABLE>
<CAPTION>
                                                                        ADDITIONS
                                                                -------------------------
                                                                                CHARGED
                                                  BALANCE AT      CHARGED       TO OTHER                         BALANCE AT
                                                  BEGINNING       TO COSTS      ACCOUNTS-        DEDUCTIONS         END
                                                  OF PERIOD     AND EXPENSES    DESCRIBE          DESCRIBE       OF PERIOD
                                                  ----------    ------------    ---------        ----------      ----------
<S>                                                  <C>              <C>            <C>              <C>           <C>
Year Ended December 31, 1997:

  Allowance for doubtful accounts ..........         1,266            253            74(3)           (570)(1)        1,023
                                                    ======         ======         =====             =====          ======

  Inventory reserves .......................        $  303         $  697         $(297)(2)           --           $  703
                                                    ======         ======         =====             =====          ======


Year Ended December 31, 1998
   Allowance for doubtful accounts .........         1,023            200           --               (370)(1)         853
                                                    ======         ======         =====             =====          ======

   Inventory Reserves ......................        $  703         $  255         $(745)(2)           --           $  213
                                                    ======         ======         =====             =====          ======

Year Ended December 31, 1999
   Allowance for doubtful accounts .........        $  853         $1,436           (95)(4)          (326)(1)       1,868
                                                    ======         ======         =====             =====          ======

   Inventory Reserves ......................        $  213         $  491         $(283)            $ --           $  421
                                                    ======         ======         =====             =====          ======
</TABLE>
- -----------
(1) Uncollectible accounts written off, net of recoveries.
(2) Write off against inventory
(3) Acquisitions
(4) Sale of business

                                       S-1

                                                                    EXHIBIT 10.8

                AMENDMENT TO NONQUALIFIED STOCK OPTION AGREEMENT


      This Amendment to Nonqualified Stock Option Agreement, dated effective
December 11, 1998, is by and between TETRA Technologies, Inc., a Delaware
corporation ("Company"), and Allen T. McInnes ("Optionee").

      Company and Optionee are parties to that certain Nonqualified Stock Option
Agreement, dated April 1, 1996 with respect to 284,977 shares of Company Stock
("Option Agreement").

      For good and valuable consideration, the receipt and sufficiency of which
are hereby acknowledged for all purposes, Company and Optionee hereby amend the
Option Agreement as follows:

      1.    Section 1 of the Option Agreement is hereby amended to change the
            number of shares of Company Stock from "284,977" to "199,484".

      2.    Section 2 of the Option Agreement is hereby amended to change the
            purchase price per share from "$16.875" to "$10.1875".

      Except as amended as set forth above, the Option Agreement remains in full
force and effect in accordance with its terms.

TETRA Technologies, Inc.                  Optionee



/s/ TOM H. DELIMITROS                 /s/ ALLEN T. MCINNES
    -----------------------------         ---------------------------------
    Tom H.  Delimitros                    Allen T.  McInnes
    Chairman, Management and              President and Chief
    Compensation Committee of the         Executive Officer
    Board of Directors


                                                                    EXHIBIT 10.9

                              EMPLOYMENT AGREEMENT


      THIS AGREEMENT made and entered into effective on the 1st day of February,
2000 (the "Effective Date"), by and between TETRA Technologies, Inc., a Delaware
corporation with its principal office at 25025 I-45 North, 6th Floor, The
Woodlands, Texas (the "Company"), and Allen T. McInnes (the "Executive").

                             W I T N E S S E T H:
                             -------------------

      WHEREAS, the Company wishes to secure the services of Executive subject to
the contractual terms and conditions set forth herein and Executive is willing
to enter into this Agreement upon the terms and conditions set forth herein; and

      WHEREAS, the Company and the Executive mutually desire that this Agreement
supercede the Employment Agreement, dated April 1, 1996, between them (the
"Previous Employment Agreement"):

      NOW, THEREFORE, in consideration of the mutual promises and agreements set
forth herein, the parties hereto agree as follows:

      1. EMPLOYMENT. During Executive's Term of Employment (as hereinafter
defined), the Company shall employ Executive, and Executive shall serve, in such
capacity(ies) as may be determined from time to time by the Board of Directors
of the Company.

      2. TERM OF EMPLOYMENT. Executive's "Term of Employment" as used herein,
shall be from the Effective Date through December 31, 2001 unless earlier
terminated pursuant to the provisions of this Agreement.

      3. COMPENSATION. The Company shall pay or cause to be paid to Executive
during his Term of Employment $24,000 per month, which includes $20,833.33 per
month as compensation for services rendered in the past and $3,166.67 per month
as compensation for services under this Agreement (collectively, the "Base
Salary"), payable in accordance with the Company's normal payroll practices.

      4. DUTIES AND RESPONSIBILITIES OF EXECUTIVE. During the Term of
Employment, Executive shall devote his services full time to the business of the
Company and perform the duties and responsibilities assigned to him by the Board
of Directors from time to time in writing to the best of his ability and with
reasonable diligence. Executive will not participate in any planning, operation
or management of any activity competitive with the Company's interest and will
not otherwise engage in any activity potentially in conflict with the interest
of the Company except as authorized in writing by the Board; provided, however,
that the Company hereby agrees that Executive may continue to serve in his
capacity as Chairman of the Board of Directors of TGC Industries, Inc.
                                                                          PAGE 1

<PAGE>
("TGC") and of its subsidiary Tidelands Geophysical Company, Inc. ("Tidelands")
indefinitely. This paragraph 4 shall not be construed as preventing Executive
from engaging in reasonable volunteer services for charitable, educational or
civic organizations provided that such activity is not competitive with the
Company's interest, or from owning stock in public corporations. Executive
affirms that he is not subject to any agreement, written or oral, with TGC,
Tidelands or any other entity that would conflict with or otherwise interfere
with Executive's ability to carry out his obligations under this Agreement.

      5.    TERMINATION OF EMPLOYMENT.

            a. TERMINATION BY THE COMPANY WITHOUT CAUSE. If Executive's services
hereunder shall be terminated by the Company prior to any "Change of Control"
for any reason other than "Cause" (as such terms are hereinafter defined),
Executive shall be entitled to receive, and the Company shall be obligated to
pay, his Base Salary as in effect on termination of employment for the remainder
of the Term of Employment, as if there had been no termination. The Company
shall have no other obligation to Executive following any termination by the
Company without Cause, and Executive shall no longer participate in any benefit
plans or programs sponsored by the Company except to the extent provided under
the terms of such plans or programs.

            b.    TERMINATION BY THE COMPANY FOR CAUSE OR SUBSTANTIAL CAUSE.

            (i) The Company may terminate Executive's employment for Cause or
      Substantial Cause. In such event, all payments of compensation under this
      Agreement shall cease forthwith and Executive shall thereafter be entitled
      to only that Base Salary then being paid to him that is earned through the
      date Executive is terminated for Cause or Substantial Cause.

            (ii) Termination shall be for "Cause" only if termination occurs
      prior to a "Change of Control" (as hereinafter defined) and is based on
      (i) a material act or acts of dishonesty on the part of Executive that
      adversely affects the Company, (ii) a material breach by Executive during
      the Term of Employment of the provisions of paragraphs 4, 8 or 9, or (iii)
      the continuing and material failure of Executive to fulfill his
      obligations under this Agreement.

            (iii) Termination shall be for "Substantial Cause" only if
      termination occurs on or after the date of a Change of Control and because
      (a) the Executive is convicted of a felony involving moral turpitude; (b)
      the Executive commits a willful serious act of fraud, misappropriation or
      embezzlement intending to enrich himself at the expense of the Company or
      any affiliated entity; or (c) the Executive, in carrying out his duties
      and responsibilities under this Agreement, is guilty of willful misconduct
      or gross neglect that results in material harm to the Company or any
      affiliated entity, unless such conduct was reasonably believed by the
      Executive in good faith to be in the best interests of the Company. In
      each case, the existence of Substantial Cause must be confirmed by written
      notice signed by a majority of the Board prior to any termination
      therefor.

                                                                          PAGE 2
<PAGE>
            c.    TERMINATION SUBSEQUENT TO CHANGE OF CONTROL.

            (i) If a Change of Control of the Company shall occur and at any
      time on or after that date the Executive shall elect to terminate his
      employment hereunder for "Good Reason" (as hereinafter defined) or
      Executive's employment is terminated by the Company without Substantial
      Cause, then the Executive shall be entitled to receive, and the Company
      shall be obligated to pay, the Base Salary then being paid to him until
      the stated expiration date of the Term of Employment in effect at the date
      of termination. The Company shall have no other obligation to Executive
      following any termination on or after a Change of Control by the Executive
      for Good Reason or by the Company without Substantial Cause, and Executive
      shall no longer participate in any benefit plans or programs sponsored by
      the Company except to the extent provided under the terms of such plans or
      programs.

            (ii) A "Change of Control" shall be deemed to have occurred on the
      first day following April 1, 2000 upon which any person or group of
      persons or entity or group of entities acquires either (i) direct or
      indirect voting power sufficient to elect a majority of the directors of
      the Company or (ii) stock or assets of some or all of the Company's
      business or operating units or affiliates comprising 60% or more of the
      total assets of the Company and its affiliates on a consolidated basis (as
      shown on the Company's financial statements for the immediately preceding
      fiscal year).

            (iii) A termination of employment is for "Good Reason" if such
      termination of employment occurs on or after the date of a Change of
      Control and follows either

                  (a) a significant diminution in the duties and
            responsibilities of the Executive immediately prior to the date of
            the Change of Control or the assignment to the Executive of any
            duties materially inconsistent with the Executive's duties
            immediately prior to the Change of Control or a substantial change
            in the Executive's reporting responsibilities as in effect
            immediately prior to the Change of Control, without the Executive's
            express written consent; or any removal of the Executive from or any
            failure to re-elect the Executive to any office of the Company held
            by the Executive immediately prior to the Change of Control, except
            in connection with promotions to higher office;

                  (b) a reduction in the Executive's Base Salary from that in
            effect immediately prior to the Change of Control;

                  (c) the failure of the Company substantially to provide and
            continue for the Executive the same or substantially comparable
            fringe benefits as provided immediately prior to the Change of
            Control;

                  (d) the Company's requiring the Executive to be based anywhere
            other than in or within 50 miles of the Executive's principal place
            of

                                                                          PAGE 3
<PAGE>
            employment at the time of the Change of Control, except for required
            travel on the Company's business to an extent substantially
            consistent with the Executive's prior business travel obligations
            or, in the event the Executive consents to relocation, the failure
            of the Company to pay (or reimburse the Executive for) all
            reasonable moving expenses incurred by the Executive relating to a
            change in the Executive's principal residence in connection with
            such relocation, and to indemnify the Executive against any loss
            realized in the sale of the Executive's principal residence in
            connection with any such change of residence; or

                  (e) the failure of the Company to obtain the assumption of
            this Agreement by any successor as contemplated by Section 14 below.

            d. OTHER TERMINATION. If Executive's services hereunder shall be
terminated during the Term of Employment due to death, disability, retirement or
resignation other than for Good Reason after the date of a Change of Control,
$3,166.67 per month of his Base Salary shall cease being owed hereunder as of
the end of the month in which such event occurs (although the Company shall
continue to pay $20,833.33 per month to Executive or his estate through December
31, 2001); and upon such termination Executive shall no longer participate in
any benefit plans or programs sponsored by the Company except to the extent
provided under the terms of such plans and programs.

            e. EFFECT OF TERMINATION. Notwithstanding any other provision of
this Agreement to the contrary, Executive agrees that he will resign his
position as a member of the Board upon his termination of employment for any
reason.

      6. REIMBURSEMENT OF EXPENSES. During Executive's Term of Employment, the
Company shall pay or reimburse Executive for all reasonable travel,
entertainment and other expenses paid or incurred by Executive in performing his
obligations hereunder. In addition, the Company shall, during Executive's Term
of Employment up to and including June 30, 2000, pay or reimburse Executive for
all reasonable club dues in accordance with a reasonable and customary program
established by the Board for such purpose.

      7. OTHER BENEFITS. During the Term of Employment, Executive shall be
entitled to participate and shall be included in any pension, profit-sharing,
deferred compensation, or similar plan or program of the Company established by
the Company, to the extent that he is eligible under the provisions of each such
plan or program. Executive shall also be entitled to participate in any group
insurance, hospitalization, medical, health and accident, life, dental,
disability or similar plan or program established by the Company, to the extent
that he is eligible under the provisions of each such plan or program. Executive
shall be eligible for vacation and sick leave in accordance with standard
Company policies. Executive agrees that the plans and programs described under
this Section 7 do not include any bonus programs or stock option plans, such as
the TETRA Technologies, Inc. 1990 Stock Option Plan, as amended.

                                                                          PAGE 4
<PAGE>
      8.    COVENANT AGAINST COMPETITION

            a. RESTRICTIVE COVENANT. Executive agrees that during the Restricted
Period (as hereinafter defined), he will not in any manner, directly or
indirectly, invest in, own, engage in or be employed by or render services or
advice to any business or enterprise engaging in the Competitive Activities (as
hereinafter defined) within the United States or within one hundred miles of any
international location where the Company or any of its affiliates is operating.
Competitive Activities shall mean (i) researching, developing, manufacturing,
providing or marketing products or services of a nature (as hereinafter defined
for purposes of this Section 8) researched, developed, manufactured, provided or
marketed by the Company or any affiliated entity; (ii) hiring, attempting to
hire, or assisting any other person or entity in hiring or attempting to hire
any person employed by the Company or any affiliated entity; or (iii)
soliciting, in competition with the Company or any affiliated entity, the
business of any customer of the Company or any affiliated entity on behalf of
whom the Company or any affiliated entity provided products or services at any
time during the Executive's Term of Employment hereunder. As used in this
Section 8, a product or service shall be deemed to be "of a nature" researched,
developed, manufactured, provided or marketed by the Company or any affiliated
entity if it is of the same or similar nature as a product or service of the
Company or any affiliated entity or is an adaptation, improvement or development
thereof. The Restricted Period is the period beginning as of the date of this
Agreement and ending three years after the end of the last month for which
Executive shall have been scheduled to receive any compensation in the form of
Base Salary under this Agreement; provided, however, that in the event of a
Change of Control, the Restricted Period shall end after the last month for
which Executive shall have been scheduled to receive any compensation in the
form of Base Salary under this Agreement. Ownership of stock in public
corporations shall not be in violation of this provision.

            b. COVENANT NOT TO SOLICIT. The Executive shall not, directly or
indirectly, during the Restricted Period, (a) take any action to solicit or
divert any business or customers (or potential customers) away from the Company
or any of its affiliates, (b) induce customers, potential customers, suppliers,
agents or other persons under contract or otherwise associated or doing business
with the Company or its affiliates to terminate, reduce or alter any such
association or business with or from the Company or its affiliates and/or (c)
induce any person in the employment of the Company or its affiliates or any
consultant to the Company or its affiliates to (i) terminate such employment, or
consulting arrangement, (ii) accept employment, or enter into any consulting
arrangement, with anyone other than the Company or its affiliates, and/or (iii)
interfere with the customers, suppliers, or clients of the Company or its
affiliates in any manner or the business of the Company or its affiliates in any
manner. For purposes of this Section 8.B, a "potential customer" shall mean a
person or entity that the Company or its affiliates, as of the date the
Executive's employment terminates, is actively soliciting for or in respect of
any current, actively pending or contemplated business.

            c. REASONABLENESS OF RESTRICTIONS. Executive acknowledges that he
has carefully read and considered the provisions of paragraphs 8.A and 8.B and
agrees that the restrictions set forth in such paragraphs including, but not
limited to, the time period of restriction, the geographical

                                                                          PAGE 5
<PAGE>
areas of restriction, and the scope of activity of restriction are fair and
reasonable and are reasonably required for the protection of the interests of
the Company, and that the Company has legitimate business interests deserving to
be protected. Notwithstanding the foregoing, in the event that any of the
provisions of paragraphs 8.A or 8.B shall be held to be invalid or
unenforceable, the remaining provisions thereof, together with any modification
thereof made by a court of competent jurisdiction, shall nevertheless continue
to be valid and enforceable as though the invalid or unenforceable parts had not
been included therein. Without limiting the foregoing, in the event that any
provision of paragraph 8.A or 8.B relating to time period or area of restriction
shall be declared by a court of competent jurisdiction to exceed the maximum
time period or area such court deems reasonable and enforceable, said time
period or area of restriction shall be deemed to become and thereafter be the
maximum time period or area which such court deems reasonable and enforceable.

      9.    INFORMATION AND INVENTIONS.

            a. CONFIDENTIAL INFORMATION. Executive agrees that he will not,
except as permitted by the Company in writing, in any manner, at any time during
the Term of Employment or thereafter, directly or indirectly, whether to the
detriment of the Company or the benefit of Executive or any third party or
otherwise, disclose or use any confidential information except in the good faith
performance of his duties under this Agreement. In addition, Executive agrees
that he will not create any derivative work or other product based upon or
resulting from any confidential information except in the good faith performance
of his duties under this Agreement. Executive further agrees that during the
Restricted Period, he will not undertake any owner, consultant or employment
role competitive or in conflict with any interest of the Company wherein the
complete unhampered fulfillment of the duties of that employment would
inherently or inevitably cause him to reveal, to base judgments upon or to use
any such Company confidential information or trade secrets. As used in this
Agreement, the term "confidential information" means any and all information
disclosed to Executive or known by or acquired by Executive as a consequence of
or through his employment by an employer or which was acquired during his
employment with an employer which is not known to the general public or in the
industry in which the Company is engaged, about the Company's products,
customers, processes, financial condition, computer programs, formulas, patents,
techniques, improvements or know-how and services, and including, without
limitation, information relating to research, development, inventions,
manufacturing, merchandising and selling. Executive shall employ all necessary
safeguards and precautions in order to ensure that unauthorized access to the
Confidential Information is not afforded to any person, firm, corporation or
entity. Upon any expiration or termination of this Agreement, upon Executive's
termination of employment, or if the Board so requests at any time, Executive
shall promptly return to the Company all Confidential Information in Executive's
possession, whether in writing, on computer disks or other media, without
retaining any copies, extracts or other reproductions thereof.

            b. INVENTIONS. Executive agrees to disclose promptly, completely and
in writing to the Company and thereafter to assign and to bind his heirs,
executors and administrators to assign to the Company or its designee,
successor, assignee or legal representative, any and all inventions, processes,
diagrams, methods, apparatuses or improvements (all of which are hereinafter
collectively called "Inventions") whatsoever, discovered, conceived or
developed, either individually or jointly

                                                                          PAGE 6
<PAGE>
with others, during the course of Executive's employment with the Company
(including all Inventions based wholly or in part upon ideas conceived during
Executive's employment with the Company), or using the Company's time, data,
facilities and/or materials, provided the subject matter is one within a field
of interest of Company. Executive's obligations under this Section apply without
regard to whether the idea for such Invention or solution to a problem occurs to
Executive on the job, at home or elsewhere. Executive further agrees that such
Inventions are the sole property of the Company, whether or not any patent
application is ever filed therefor. Executive agrees that he will cooperate
fully in assisting the Company in filing any patent, copyright or associated
trademark application with regard to any such Invention, if the Company elects
to file such application, including signing written assignments of the
Executive's rights to such Inventions.

      10. INJUNCTIVE RELIEF. Executive acknowledges and agrees that the Company
will be irreparably harmed and will have no adequate remedy at law if Executive
breaches or threatens to breach any of the provisions of paragraph 8 or
paragraph 9 of this Agreement. Executive agrees that the Company shall be
entitled to injunctive and other equitable relief to prevent any breach or
threatened breach of paragraph 8 or paragraph 9. Executive agrees that the
Company shall also be entitled to specific performance of each of the terms of
such paragraphs in addition to any other legal or equitable remedies that the
Company may have. Executive further agrees that, in any equity proceeding
relating to the enforcement of the terms of paragraph 8 or paragraph 9, he shall
waive and he agrees not to raise the defense that the Company has an adequate
remedy at law.

      11. NOTICES. All notices and other communications hereunder shall be in
writing and shall be given (and shall be deemed to have been duly given upon
receipt) by delivery in person, by registered or certified mail (return receipt
requested and with postage prepaid thereon) or by facsimile transmission to the
respective parties at the following addresses (or at such other address as
either party shall have previously furnished to the other in accordance with the
terms of this Section 11):

            if to the Company:

            TETRA Technologies, Inc.
            c/o Chairman of the Board of Directors
            25025 I-45 North
            6th Floor
            The Woodlands, Texas 77380

            if to the Executive:

            Allen T. McInnes
            1206 Nantucket
            Houston, Texas 77057

      12. ASSISTANCE WITH LITIGATION. For a period of two years after the end of
the last period for which Executive shall have received any compensation under
this Agreement and for as long

                                                                          PAGE 7
<PAGE>
thereafter as any litigation instituted within such period continues, Executive
shall furnish such information and proper assistance as may be reasonably
necessary in connection with any litigation in which the Company is then or may
become involved. The Company agrees to reimburse Executive for all expenses
reasonably incurred in furnishing such assistance.

      13.   INCOME TAX WITHHOLDING AND OTHER TAX CONSIDERATIONS.

            a. WITHHOLDING. The Company may withhold from any compensation or
benefits payable under this Agreement all federal, state, city or other taxes
that shall be required pursuant to any law or governmental regulation or ruling.

            b. CERTAIN OTHER PAYMENTS. If the Executive is liable for the
payment of any excise tax (the "Basic Excise Tax") because of Section 4999 of
the Internal Revenue Code of 1986, as amended (the "Code"), or any successor or
similar provision, with respect to any payments or benefits received or to be
received from the Company or any successor to the Company, whether provided
under this Agreement or otherwise, the Company shall pay the Executive an amount
(the "Special Reimbursement") which, after payment by the Executive (or on the
Executive's behalf) of any federal, state and local taxes, including, without
limitation, any further excise tax under such Section 4999 of the Code, on, with
respect to or resulting from the Special Reimbursement, equals the net amount of
the Basic Excise Tax.

      14. CONSOLIDATION, MERGER, OR SALE OF ASSETS. Nothing in this Agreement
shall preclude the Company from consolidating or merging into or with, or
transferring all or substantially all of its assets to, another corporation
which assumes this Agreement and all obligations and undertakings of the Company
hereunder; provided, that no such action shall diminish Executive's rights. Upon
such a consolidation, merger, or transfer of assets in assumption of the
Company, the term the "Company" as used herein, shall mean such other
corporation, respectively.

      15.   GENERAL PROVISIONS.

            a. ASSIGNABILITY; ATTACHMENT AND EFFECT. Neither this Agreement nor
any right or interest hereunder shall be assignable by Executive, or his legal
representatives without the prior written consent of the Company. Except as
required by law, no right to receive payments under this Agreement shall be
subject to anticipation, commutation, alienation, sale, assignment, encumbrance,
charge, pledge, hypothecation, execution, attachment, levy, or similar process
or assignment by operation of law, and any attempt, voluntary or involuntary, to
effect such action shall be null, void and of no effect. This Agreement shall be
binding upon and inure to the benefit of the Company, its successors and
assigns.

            b. WAIVER, SEVERABILITY AND AMENDMENT OF AGREEMENT. This Agreement
may not be modified or amended except by an instrument in writing signed by the
parties hereto. No term or condition of this Agreement shall be deemed to have
been waived, nor shall there be an estoppel against the enforcement of any
provision of this Agreement, except by written instrument of the party charged
with such waiver or estoppel. No such written waiver shall be deemed a
continuing waiver

                                                                          PAGE 8
<PAGE>
unless specifically stated therein, and each such waiver shall operate only as
to the specific term or condition waived and shall not constitute a waiver of
such term or condition for the future or as to any act other than that
specifically waived. If, for any reason, any provision of this Agreement is held
invalid, such invalidity shall not affect any other provision of this Agreement
not held so invalid, and each such other provision shall to the full extent
consistent with law continue in full force and effect. If any provision of this
Agreement shall be held invalid in part, such invalidity shall in no way affect
the rest of such provision not held so invalid, and the rest of such provision,
together with all provisions of this Agreement, shall to the full extent
consistent with law continue in full force and effect. Unless otherwise
provided, if this Agreement or any portion thereof conflicts with any law or
regulation governing the activities of the Company, the Agreement or appropriate
portion thereof shall be deemed invalid and of no force or effect.

            c. SUBMISSION TO ARBITRATION. Any controversy or claim arising out
of or relating to this contract or its alleged breach or any matters arising,
either directly or indirectly, out of Executive's employment relationship with
the Company shall be settled by binding arbitration in accordance with the
Commercial Arbitration Rules of the American Arbitration Association ("AAA"),
and any judgment on the award rendered by the arbitrator may be entered by any
court having jurisdiction thereof. The arbitrator shall be selected by mutual
agreement of the parties, if possible. If the parties fail to reach agreement
upon appointment of an arbitrator within 30 days following receipt by one party
of the other party's notice of desire to arbitrate, the arbitrator shall be
selected from a panel or panels of persons submitted by the AAA. The selection
process shall be that which is set forth in the AAA Commercial Arbitration Rules
then prevailing, except that, if the parties fail to select an arbitrator from
one or more panels, AAA shall not have the power to make an appointment but
shall continue to submit additional panels until an arbitrator has been
selected. Demand for arbitration must be made within one year after the accrual
of the claim on which the demand is based. If the claiming party fails to demand
arbitration within one year, the claim shall be deemed to be waived and shall be
barred from either arbitration or litigation.

            d. HEADINGS; GOVERNING LAW. The headings of paragraphs herein are
included solely for convenience and reference and shall not control the meaning
or interpretation of any of the provisions of this Agreement. THIS AGREEMENT
SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF
TEXAS, WITHOUT REGARD TO PRINCIPLES OF CONFLICTS OF LAW.

            e. PREVIOUS EMPLOYMENT AGREEMENT. The Company and Executive hereby
agree that the Previous Employment Agreement is superceded by this Agreement in
its entirety, and that none of the provisions of article 5 of the Previous
Employment Agreement regarding termination shall be given any effect. The
Company and the Executive hereby represent to each other that they are not aware
of any defaults under the Previous Employment Agreement.

                                                                          PAGE 9
<PAGE>
      IN WITNESS THEREOF, the Company has caused this Agreement to be executed
by its officer thereunto duly authorized, and Executive has signed this
Agreement, all as of the day first above written.

                                          TETRA Technologies, Inc.



                                          By: /s/ GEOFFREY M. HERTEL
                                              -------------------------------
                                                  Geoffrey M. Hertel,
                                                  Chief Operating Officer


                                               /s/ ALLEN T. McINNES
                                              --------------------------------
                                                   Allen T. McInnes, Executive

                                                                         PAGE 10

                                                                      Exhibit 21

                            TETRA TECHNOLOGIES, INC.
                 List of Subsidiaries or Other Related Entities

TETRA International Incorporated
      TETRA de Mexico, S.A. de C.V.
      TETRA Technologies de Venezuela, S.A.
      TETRA Technologies do Brasil, Ltda.
      TETRA Technologies U.K. Limited
      TETRA Technologies de Mexico, S.A. de C.V.
      TETRA Technologies Nigeria Ltd.

TETRA Applied Technologies, Inc.

TETRA F.S.C. Limited

TETRA Investment Holding Co., Inc.

TETRA Micronutrients, Inc.
      American Microbial Technologies, Inc.
      Seajay Industries, Inc.
      TETRA Agricultural Products de Mexico, S.A. de C.V.

TETRA Real Estate, LLC

TETRA Real Estate, L.P.

TETRA Services, Inc.

TETRA Technologies Australia Pty Ltd

TETRA Thermal, Inc.
      TETRA Process Services, L.C.

TETRA U.K. Limited

Damp Rid, Inc.

Industrias Sulfamex, S.A. de C.V.

KVAC, LLC


                                                                      Exhibit 23


                         CONSENT OF INDEPENDENT AUDITORS



We consent to the incorporation by reference in the Registration Statement on
Form S-3 (No. 33-99810), Registration Statement on Form S-4 (No. 33-80881) and
the Registration statements on Form S-8 (Nos. 33-40509, 33-41337, 33-35750,
33-76804, 33-76806, 333-04284 and 333-09889) of TETRA Technologies, Inc. of our
report dated March 28, 2000, with respect to the consolidated financial
statements and schedule of TETRA Technologies, Inc. and subsidiaries included in
the Annual Report (Form 10-K) for the year ended December 31, 1999.







Houston, Texas
March 28, 2000


<TABLE> <S> <C>

<ARTICLE> 5
<LEGEND>
THE FINANCIAL DATA SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED
FROM TETRA TECHNOLOGIES, INC. AND SUBSIDIARIES AND IS QUALIFIED IN ITS ENTIRETY
BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1000

<S>                             <C>
<PERIOD-TYPE>                  12-MOS
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               DEC-31-1999
<CASH>                                           4,184
<SECURITIES>                                         0
<RECEIVABLES>                                   52,088
<ALLOWANCES>                                     1,868
<INVENTORY>                                     57,020
<CURRENT-ASSETS>                               121,608
<PP&E>                                         193,666
<DEPRECIATION>                                  63,555
<TOTAL-ASSETS>                                 290,636
<CURRENT-LIABILITIES>                           46,902
<BONDS>                                         75,026
                                0
                                          0
<COMMON>                                           136
<OTHER-SE>                                     149,285
<TOTAL-LIABILITY-AND-EQUITY>                   290,636
<SALES>                                        140,349
<TOTAL-REVENUES>                               215,301
<CGS>                                          116,302
<TOTAL-COSTS>                                  169,364
<OTHER-EXPENSES>                                48,959
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                               7,756
<INCOME-PRETAX>                                 25,889
<INCOME-TAX>                                     9,875
<INCOME-CONTINUING>                             16,014
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                      (5,782)
<NET-INCOME>                                    10,232
<EPS-BASIC>                                       0.75
<EPS-DILUTED>                                     0.75


</TABLE>


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