TANKNOLOGY NDE INTERNATIONAL INC
10-Q, 1999-05-17
TESTING LABORATORIES
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               Tanknology-NDE International, Inc. and Subsidiaries


                     U.S. SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549

                                    FORM 10-Q

(Mark One)
 [X]      Quarterly Report Under Section 13 or 15(d) of the Securities  Exchange
          Act of 1934 for the quarterly period ended March 31, 1999.

 [ ]      Transition Report Under to Section 13 or 15(d) of the Exchange Act for
          the transition period from to .



                         Commission File Number 1-10361


                       Tanknology-NDE International, Inc.
           (Exact name of business issuer as specified in its charter)


        Delaware                                          95-3634420
(State of Incorporation)                      (IRS Employer Identification No.)


              8900 Shoal Creek Blvd., Bldg. 200 Austin, Texas 78757
                    (Address of Principal Executive offices)


Issuer's telephone number, including area code (512) 451-6334



Check  whether the Issuer (1) filed all reports  required to be filed by Section
13 or 15(d) of the  Exchange  Act during the past 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 ninety days.

                                    Yes [X]     No [ ]

State the number of shares outstanding of each of the issuer's classes of common
equity, as of the latest practicable date.



               Class                   Outstanding at March 31, 1999
               --------------       -----------------------------------

               Common                           16,774,940






                                      - 1 -

<PAGE>


               Tanknology-NDE International, Inc. and Subsidiaries




                                      INDEX


                                                                     Page Number

PART I   Financial Information

Item 1.  Financial Statements (Unaudited)

         Condensed Consolidated Balance Sheets
                  March 31, 1999 (Unaudited) and December 31, 1998 ............3

         Condensed Consolidated Statements of Operations (Unaudited)
                  Three Months Ended March 31, 1999 and March 31, 1998.........4

         Condensed Consolidated  Statements of Cash Flows (Unaudited)
                  Three Months Ended March 31, 1999 and March 31, 1998.........5

         Notes To Condensed Consolidated Financial Statements (Unaudited)......6

Item 2.  Management's Discussion and Analysis of Financial
                  Condition and Results of Operations ........................10



PART II  Other Information

Item 6.  Exhibits and Reports on Form 8-K.....................................14




                                      - 2 -

<PAGE>


               Tanknology-NDE International, Inc. and Subsidiaries


PART I    Financial Information
Item 1.   Financial Statements (Unaudited)

                      Condensed Consolidated Balance Sheets
<TABLE>
<CAPTION>

                                                                           March 31, 1999   December 31, 1998
                                                                           --------------   -----------------
ASSETS                                                                         (Unaudited)
<S>                                                                        <C>              <C>

    Cash and equivalents...............................................    $      178,055   $        416,189
    Trade accounts receivable, less allowance for doubtful accounts of
             $1,374,699 at March 31, 1999 and
             $1,798,044 at December 31, 1998...........................        13,093,531         18,071,273
    Inventories........................................................         1,216,332          1,218,271
    Prepaid expenses and other current assets..........................           356,054            521,909
                                                                           --------------   -----------------
             Total Current Assets......................................        14,843,972         20,227,642

    Restricted cash....................................................         3,000,000          3,000,000

    Equipment and improvements, net of accumulated depreciation of
             $14,039,656 at March 31, 1999 and
             $13,470,663 at December 31, 1998..........................         7,983,012          8,109,097
    Goodwill, net of accumulated amortization of $166,605 at
             March 31, 1998  and  $125,442 at December 31, 1998........         2,359,953          2,401,115
    Patents, licenses and other intangible assets, net of accumulated
             amortization of $1,513,686 at March 31, 1998 and
             $1,527,761 at   December 31, 1998.........................           784,522          1,070,446
    Deferred financing costs, net......................................           617,198            674,531
                                                                           --------------   -----------------
             Total Assets..............................................    $   29,588,657   $     35,482,831
                                                                           ==============   =================

LIABILITIES, REDEEMABLE CONVERTIBLE PREFERRED STOCK
AND STOCKHOLDERS' DEFICIT

    Accounts payable ..................................................    $    2,247,555   $      4,874,180
    Accrued liabilities................................................         1,508,067          1,649,020
    Accrued payroll and payroll taxes..................................         2,602,127          4,363,312
    Current portion of long-term debt..................................         2,746,773          2,314,991
                                                                           --------------   -----------------
             Total Current Liabilities.................................         9,104,522         13,201,503

    Long Term Debt, less current portion ..............................        17,687,623         18,271,743

    Deferred License Revenue...........................................           173,047            207,135

    Redeemable Convertible Preferred Stock, at redemption value........         1,500,000          1,500,000

    Stockholders' Deficit:
         Common stock, $.0001 par value;  authorized  50,000,000 shares;  issued
             and outstanding 16,771,940 shares at March 31, 1999
             and 16,735,040  shares at  December 31, 1998..............             1,677              1,674
         Warrants......................................................           321,000            321,000
         Additional paid-in capital....................................        27,699,900         27,733,366
         Accumulated deficit...........................................       (26,938,025)       (25,755,500)
         Cumulative foreign currency translation adjustment............            38,913              1,910
                                                                           --------------   -----------------
                                                                                1,123,465          2,302,450
                                                                           --------------   -----------------
             Total Liabilities, Redeemable Convertible Preferred Stock
                   and Stockholders' Deficit............................   $   29,588,657   $     35,482,831
                                                                           ==============   =================
<FN>
See accompanying notes to condensed consolidated financial statements.
</FN>
</TABLE>

                                      - 3 -

<PAGE>


               Tanknology-NDE International, Inc. and Subsidiaries


                 Condensed Consolidated Statements of Operations
                                   (Unaudited)




<TABLE>
<CAPTION>
                                                                    Three Months Ended
                                                              ------------------------------

                                                              March 31, 1999  March 31, 1998
                                                              --------------  --------------

<S>                                                           <C>             <C>
Revenues ..................................................   $ 12,580,473    $ 11,697,947

Cost of services ..........................................     10,829,692       9,005,243
                                                              --------------  --------------

         Gross Margin .....................................      1,750,781       2,692,704

Selling, general and administrative .......................      2,904,559       2,316,802

                                                              --------------  --------------
         Operating Income (Loss) ..........................   $ (1,153,778)   $    375,902

Other income (expense):
        Interest income ...................................         29,335          32,020
        Interest expense ..................................       (464,712)       (395,517)
        Other income (expense), net .......................         53,416             711
                                                              --------------  --------------

        Net Income (Loss) Before Provision for Income Taxes     (1,535,739)         13,116

 Benefit (Provision) for income taxes .....................        353,220          (4,400)
                                                              --------------  --------------

         Net Income (Loss) ................................     (1,182,519)          8,716

 Less - Preferred stock dividends .........................        (37,500)        (37,500)


         Net Loss Available to Common Stockholders ........   $ (1,220,019)   $    (28,784)
                                                              ==============  ==============

         Basic and Diluted Loss  per Share ................   $      (0.07)   $       --
                                                              ==============  ==============

         Weighted Average Number of Shares Outstanding ....     16,739,151      16,044,166
                                                              ==============  ==============


<FN>
See accompanying notes to condensed consolidated financial statements.
</FN>
</TABLE>



                                      - 4 -

<PAGE>


               Tanknology-NDE International, Inc. and Subsidiaries


                 Condensed Consolidated Statements of Cash Flows
                                   (Unaudited)

<TABLE>
<CAPTION>

                                                                          Three Months Ended
                                                                     -----------------------------

                                                                     March 31, 1999 March 31, 1998
                                                                     -------------- --------------

<S>                                                                  <C>            <C>
Cash Flows from Operating Activities

         Net income (loss) .......................................   $(1,182,519)   $     8,716

Adjustments to Reconcile Net Income (Loss) to Net Cash Provided by
          Operating Activities

         Depreciation and amortization ...........................       752,830        690,787
         Amortization of discounts and financing costs ...........        57,333         69,161
         Deferred license revenue earned .........................       (34,088)       (45,833)
         Gain on sale of patent ..................................       (95,000)          --
         Other ...................................................        37,003         (9,334)

Changes in Operating Assets and Liabilities

         Trade accounts receivable ...............................     4,977,742        147,774
         Inventories .............................................         1,937       (116,200)
         Prepaid expenses and other current assets ...............       165,855        373,368
         Accounts payable ........................................    (2,626,625)       (66,556)
         Accrued liabilities .....................................      (140,953)       150,694
         Accrued payroll and payroll taxes .......................    (1,761,185)       (34,778)
                                                                     -------------- --------------
         Net cash provided in operating activities ...............       152,330      1,167,799

Cash Flows from Investing Activities

         Additions to equipment and improvements .................      (504,657)      (641,094)
                                                                     -------------- --------------
         Net cash used in investing activities ...................      (504,657)      (641,094)

Cash Flows from Financing Activities

         Net activity in revolving line of credit ................       650,000        (42,667)
         Preferred stock dividends ...............................       (37,500)       (37,500)
         Proceeds from issuance of common stock ..................         4,031           --
         Proceeds from long-term debt ............................       141,949           --
         Payments on long-term debt ..............................      (644,287)      (496,502)
         Deferred financing costs ................................          --         (143,663)
                                                                     -------------- --------------
         Net cash provided by (used in) financing activities .....       114,193       (720,332)

         Net decrease in cash and equivalents ....................      (238,134)      (193,627)

         Cash and equivalents at beginning of period .............       416,189        193,627

         Cash and equivalents at end of period ...................       178,055           --
                                                                     ============== ==============
</TABLE>



                                      - 5 -

<PAGE>


               Tanknology-NDE International, Inc. and Subsidiaries


              Notes to Condensed Consolidated Financial Statements
                                   (Unaudited)


NOTE 1:   ACCOMPANYING UNAUDITED FINANCIAL STATEMENTS

     Basis  of   Presentation:   The   consolidated   financial   statements  of
Tanknology-NDE International, Inc. and its subsidiaries (the "Company") included
herein have been prepared without audit pursuant to the rules and regulations of
the  Securities  and  Exchange  Commission,  and, in the opinion of  management,
reflect all  adjustments  necessary to present  fairly the results of operations
for such interim periods.  Certain information and footnote disclosures normally
included in financial  statements prepared in accordance with generally accepted
accounting  principles have been condensed or omitted pursuant to such rules and
regulations;  however,  management believes that the disclosures are adequate to
make the  information  presented  not  misleading.  The  accompanying  unaudited
financial  statements for the three months ended March 31, 1999 and 1998 contain
all  adjustments,  consisting of only normal  recurring  accruals,  necessary to
present  fairly the  financial  position of the Company as of March 31, 1999 and
1998 and the  results of  operations  and cash flows for the three  months  then
ended.  The results of  operations  for the  Company's  interim  periods are not
necessarily  indicative of the results to be expected for the entire year. It is
suggested  that  these  financial  statements  be read in  conjunction  with the
audited financial  statements and notes thereto included in the Company's annual
report on Form 10-KSB for the year ended December 31, 1998. In 1999, the Company
is required to file Form 10-Q and Form 10-K in accordance  with  Regulation  S-X
under  the 1933 and 1934  Securities  Acts.  The  Company  no  longer  meets the
definition of a "Small  Business  Issuer" as defined in Regulation S-B under the
1933 and 1934 Acts.


NOTE 2:   INCOME (LOSS) PER SHARE CALCULATIONS

     The following  table sets forth the calculation of basic and diluted income
(loss) per share:


                                                        Three Months Ended
                                                 -------------------------------
                                                 March 31, 1999   March 31, 1998
                                                 --------------   --------------
Numerator:
         Net income (loss) ...................   $  (1,182,519)  $        8,716
         Preferred stock dividends ...........         (37,500)         (37,500)
                                                 --------------   --------------
         Numerator for basic income (loss) per
         share -income available to common
         shareholders ........................      (1,220,019)         (28,784)



                                      - 6 -

<PAGE>


               Tanknology-NDE International, Inc. and Subsidiaries


                                                        Three Months Ended
                                                 -------------------------------
                                                 March 31, 1999   March 31, 1998
                                                 --------------   --------------
Denominator:
         Denominator for basic income (loss) per
         share - weighted-average shares .......     16,739,151       16,044,166

         Effect of dilutive securities:
         Stock options .........................          --                --
         Warrants ..............................          --                --
         Convertible preferred stock ...........          --                --
                                                 --------------   --------------
         Dilutive potential common shares ......          --                --

         Denominator for diluted earnings (loss)
         per share - adjusted weighted- average
         shares and assumed  conversions .......          --                --
                                                 ==============   ==============

         Basic income (loss) per share ......... $        (0.07)  $         --
                                                 ==============   ==============

         Diluted income (loss) per share ....... $        (0.07)  $         --
                                                 ==============   ==============



NOTE 3:   COMPREHENSIVE INCOME

     Total  non-stockholder  changes  in equity  include  all  changes in equity
during a period except those resulting from investments by and  distributions to
stockholders. Total comprehensive income for the three month periods ended March
31, 1999 and 1998 was as follows:


                                                  Three Months Ended
                                           -------------------------------
                                           March 31, 1999   March 31, 1998
                                           --------------   --------------

Net income (loss) ......................   $  (1,220,019)   $     (28,784)
Foreign currency translation gain (loss)          37,003           (9,334)
                                           --------------   --------------
Total comprehensive income (loss) ......   $  (1,183,016)   $     (38,118)
                                           ==============   ==============




NOTE 4:   SEGMENT INFORMATION

     The Company  manages its  business  segments  primarily  along two lines of
business,  Field Services and Management Services.  Field Services comprises all
services that are typically  performed out of the Company's  regional offices by
field  technicians   operating  from  the  Company's  fleet  of  rolling  stock.
Management Services comprises all Compliance Management Services, International,
Remote  Monitoring,  Maintenance  Management and  Construction  Services.  These
services are  primarily  "back  office"  functions  whereby the Company  manages
customers' information, oversees compliance or construction projects or performs

                                      - 7 -

<PAGE>


               Tanknology-NDE International, Inc. and Subsidiaries


technology  licensing.  These  services  are  primarily  performed  out  of  the
Company's corporate office in Texas (Compliance  Management,  Remote Monitoring,
International)  or offices in California  (Maintenance  Management)  and Georgia
(Construction Management).

     The accounting policies of the two segments are the same as those described
in the  "Summary  of  Significant  Accounting  Policies"  in Note 1 to the  1998
financial  statements.  The Company  evaluates the  performance  of its segments
based on segment  profit.  Segment  profit is defined as segment  revenues  less
those  direct  costs  associated  with  the  operations  and  does  not  include
depreciation,  amortization, interest expense, income taxes or certain corporate
expenses that are managed  outside the  reportable  segment such as the costs of
the finance, marketing,  information technology, legal, executive management and
national  sales  groups.  The Company does not allocate and manage its assets by
segment.  Accordingly,  the Company  considers all assets to be corporate assets
and as such no allocation of assets has been made.

     Summary  information  by segment as of and for the periods  ended March 31,
1999 and 1998 is as follows:


                                                  1999                 1998
                                           ----------------      ---------------
Field Services:
   Segment revenues ...................    $      9,879,106      $     9,243,113
   Segment profit .....................           1,916,892            2,035,691
Management Services:
   Segment revenues ...................           2,911,842            2,471,067
   Segment profit (loss) ..............    $        (81,676)     $       444,474


     A  reconciliation  of the Company's  segment revenues and segment profit to
the corresponding  consolidated  amounts as of and for the years ended March 31,
1999 and 1998 is as follows:


                                                  1999                 1998
                                           ----------------      ---------------
Segment revenues: ......................   $    12,790,948       $   11,714,180
Field Services revenues  from
Management Services ....................          (210,475)             (16,233)
                                           ----------------      ---------------
Consolidated revenues ..................   $    12,580,473       $   11,697,947
                                           ================      ===============



                                                  1999                 1998
                                           ----------------      ---------------
Segment net profit: ...................... $     1,835,216       $    2,480,165
Corporate expenses .......................      (2,236,164)          (1,413,476)
Depreciation and amortization ............        (752,830)            (690,787)
Interest income ..........................          29,335               32,020
Interest expense .........................        (464,712)            (395,517)
Other income/expense .....................          53,416                  711
Income taxes .............................         353,220               (4,400)
Extraordinary gain .......................            --                   --
                                           ----------------      ---------------
Net Income ............................... $    (1,182,519)      $        8,716
                                           ================      ===============



                                      - 8 -

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               Tanknology-NDE International, Inc. and Subsidiaries


NOTE 5:   COMMITMENTS AND CONTINGENCIES

Veeder-Root Company and DH Holdings Corp.

     On February 8, 1999, the Company invoked the dispute  resolution  provision
of the Distribution,  Services and Marketing Agreement, dated as of December 23,
1997, by and between the Company and Veeder-Root  Company (the "DSM Agreement").
In response to the Company's notice, on February 12, 1999, Veeder-Root Company's
counsel advised the Company's  counsel that DH Holdings and Veeder-Root  Company
may have  certain  claims  against  the  Company  and that  Veeder-Root  Company
intended to invoke the dispute  resolution  provisions of the DSM Agreement.  On
April 14, 1999, the Company filed a demand for arbitration in which it sought an
interpretation  of the DSM. In response to the  Company's  filing,  Veeder- Root
Company filed an answer and counterclaims  regarding both declaratory  judgement
matters and  allegations  for damages.  The Company  believes that the result of
these  arbitration  proceedings  with  Veeder-  Root  Company  will  not  have a
significant  adverse  effect  on the  balance  sheet at March 31,  1999,  or the
results of operations for the period ended March 31, 1999.

     Additionally,  the Company  believes any potential claims DH Holdings Corp.
may have regarding the Note,  Preferred  Stock and Warrant  Purchase  Agreement,
dated as of December 23, 1999, and the associated Note Payable,  Preferred Stock
and Warrants will not have a significant  adverse effect on the balance sheet at
March 31,1999, or the results of operations for the period ended March 31, 1999.

Gilbarco Note

     In November 1995, in  consideration  of the assignment of certain  Gilbarco
patents, the Company entered into a note to pay Gilbarco an additional $300,000.
The $300,000  note was  outstanding  at December 31, 1998 and was due in October
2000.  In the first  quarter of 1999,  the Company  entered into an agreement to
reassign  the patents  back to Gilbarco in exchange for the note and the accrued
interest  thereon.  The  Company  recorded  a small  gain from the sale of these
patents in the first quarter 1999.

     There have been no  material  changes  in the  information  reported  as of
December 31, 1998,  as reported on Form 10-KSB in Footnote 11  accompanying  the
audited financial statements.


NOTE 6:   IMPACT OF RECENTLY ISSUED ACCOUNTING STANDARDS

     None.


NOTE 7:   SUBSEQUENT EVENTS

     During April 1999, the Company  renegotiated certain terms of the Revolving
Line of Credit to  increase  the  maximum  borrowings  from $9  million to $12.5
million. The expiration date of the facility is December 31, 2000.




                                      - 9 -

<PAGE>


               Tanknology-NDE International, Inc. and Subsidiaries


Item 2.   Management's  Discussion  and  Analysis  of  Financial  Condition  and
          Results of Operations

Results of Operations

     The following table reflects the percentage  relationship to net revenue of
certain items  included in the Company's  statements of operations for the three
month periods ended March 31, 1999 and 1998.



<TABLE>
<CAPTION>
                                                                 Three Months Ended
                                                           -------------------------------

                                                           March 31, 1998   March 31, 1997
                                                           --------------   --------------
<S>                                                        <C>              <C>
Revenues .................................................      100%             100%

Cost of Sales ............................................       86%              77%
                                                           --------------   --------------

Gross Margin .............................................       14%              23%

Selling, General and Administrative ......................       23%              20%

                                                           --------------   --------------
Operating Income ( Loss) .................................       (9)%              3%

Other Income (Expense) ...................................       (3)%             (3)%

Net Income (Loss) Before Provision for Income Taxes ......      (12)%             --

Provision for Income Taxes ...............................        3%              --

Net Income (Loss) ........................................       (9)%             --
                                                           ==============   ==============
</TABLE>


Revenues

     Revenues  for the  three  months  ended  March 31,  1999  were  $12,580,473
compared to $11,697,947 in the 1998 period, an increase of $882,526,  or 8%. The
increase in revenues from 1998 is primarily due to the  following  factors;  (i)
revenues of $373,246 generated by the Maintenace  Management  Division which did
not begin operations until the third quarter of 1998, (ii) an increase of 61% in
Compliance  Management  Services  revenue,  and  (iii) an over 42%  increase  in
cathodic protection installation, maintenance, repair and inspection revenues.

Cost of  Services

     Cost of services for the three months ended March 31, 1999 were $10,829,692
or 86% of revenue  compared to $9,005,243 or 77% of revenue in 1998, an increase
of  $1,824,449,  or 20%. Gross margin was $1,750,781 or 14% of revenue for 1998,
compared to $2,692,704 or 23% of revenue for 1998.  The decrease in gross margin
percentage is largely due to the increase in cost of services in 1998 which were
sustained  in the first  quarter of 1999.  During the first  quarter of 1999 the
company realized a 44% drop in revenues  compared to the fourth quarter of 1999.
Cost of services  decreased  disproportionately  by 29% in first quarter of 1999
when  compared to the fourth  quarter of 1998.  This was  primarily due to under
utilization  of fixed  costs  in the  first  quarter  of  1999,  which  had been
increased  over the last six months of 1998 to keep pace with the demand for the
Company's Underground Storage Tank (UST) services.  These services were in great
demand due to the December 22, 1998 deadline set by the Environmental Protection
Agency that  required UST  facilities to be tested and upgraded by the deadline.
Management  has  implemented  a plan to cut fixed  costs and  reduce  day to day
expenses.


                                     - 10 -

<PAGE>


               Tanknology-NDE International, Inc. and Subsidiaries


Selling, General and Administrative

     Selling,  general,  and  administrative  expense for the three months ended
March 31, 1999 was $2,904,559 or 23% of revenue compared to $2,316,802 or 20% of
revenue, an increase of $587,757 or 25% compared to the three months ended March
31, 1998. The increase in selling,  general, and administrative  expenses is due
to the addition of sales and  administrative  resources to support the growth in
revenue and to support an increase in the varieties of services offered.

Earnings before Depreciation, Amortization, Interest and Taxes (EBITDA)

     For the three months ended March 31, 1999, EBITDA was $(347,532) or (3)% of
revenues  compared to  $1,066,689  or 9% of revenues  in 1998.  The  decrease in
EBITDA, was primarily due to the increased cost of services in the first quarter
of 1999 compared to the first quarter of 1998. The Company  believes that EBITDA
is an  important  measure of the  Company's  financial  performance  as it is an
indication  of the funds  generated by  operations  available  for debt service,
capital  expenditures  and payment of taxes.  It is commonly used to analyze and
compare companies on the basis of operating performance, leverage and liquidity.
However,  EBITDA is not  intended  to be a  performance  measure  that should be
regarded as an alternative to, or more meaningful than,  either operating income
or net  income as an  indicator  of  operating  performance  or cash  flows as a
measure of  liquidity,  as  determined in  accordance  with  generally  accepted
accounting  principles.  Also,  EBITDA,  as  computed  by  the  Company,  is not
necessarily comparable to similarly titled amounts of other companies.

Interest Expense

     Interest  expense for the three months ended March 31, 1999 was $464,712 or
4% of revenue  compared  to  $395,517  or 3% of revenue in 1998,  an increase of
$69,195 or 17%.  The  increase in interest  expense is due to to the increase in
the amount  outstanding  on the line of credit  compared  to the same prior year
period.

Net Income (Loss)

     For the three months  ended March 31,  1999,  the Company had a net loss of
$(956,168) before preferred stock dividend requirements compared to a net income
of $8,716 in 1998 for the same period, a decrease of ($964,884). The decrease in
net income  (loss) was  primarily due to the increase of cost of services in the
first  quarter of 1999  compared  to the first  quarter of 1998 and to the lower
than expected level of first quarter revenues.

Liquidity and Capital Resources

     At March 31, 1999, the Company had working  capital of $5,739,450  compared
to working  capital of  $7,026,139  at  December  31,  1998.  Cash  provided  by
operating  activities  of  $152,330  for the three  months  ended March 31, 1999
decreased by $1,015,469 as compared to Cash provided by operating  activities of
$1,167,799 in 1998. Collections on accounts receivables of $4,977,742 during the
first quarter were used to pay down accounts payables and accrued liabilities.

     Cash  used  in   investing   activities   (consisting   solely  of  capital
expenditures)  totaled  $504,657  for the three  months  ended  March  31,  1999
compared to cash used for capital expenditures of $641,094 in the 1998 period.

     At March 31, 1999, the Company had  outstanding  long-term debt  (including
current maturities) of $20,434,396 compared to $20,586,734 at December 31, 1998.
Required term-loan principal repayments of $300,000, a net $650,000 addition on

                                     - 11 -

<PAGE>


               Tanknology-NDE International, Inc. and Subsidiaries


the  revolving  credit line and net other debt  repayments of $202,338 were made
during the quarter. At March 31, 1999, the Company had $1,525,000  available for
additional borrowing under its revolving credit agreement. As of March 31, 1999,
the Company was in compliance  with the financial debt covenants  related to its
long-term financing agreements.

Impact of Year 2000

     The Year 2000 issue is the result of computer  programs being written using
two  digits  rather  than four to define  the  applicable  year.  The  Company's
computer  equipment and software and devices with embedded  technology  that are
time-sensitive  may recognize a date using "00" as the year 1900 rather than the
year 2000.  This could  result in a system  failure or  miscalculations  causing
disruptions of operations,  including, among other things, a temporary inability
to process  transactions,  send  invoices or engage in similar  normal  business
activities.

     Tanknology has undertaken various  initiatives  intended to ensure that its
computer  equipment and software will function properly with respect to dates in
the year 2000 and thereafter. For this purpose, the term "computer equipment and
software"   includes  systems  that  are  commonly  thought  of  as  information
technology  ("IT")  systems,   including   accounting,   data  processing,   and
telephone/PBX  systems,  scanning equipment and other miscellaneous  systems, as
well as systems  that are not commonly  thought of as IT systems,  such as alarm
systems, fax machines or other miscellaneous systems. Both IT and non-IT systems
may contain  imbedded  technology,  which  complicates  the Company's  Year 2000
identification,  assessment,  remediation  and testing  efforts.  Based upon its
identification and assessment efforts to date, the Company believes that certain
of  the  computer   equipment  and  software  it  currently  uses  will  require
replacement or  modification.  In addition,  in the ordinary course of replacing
computer  equipment and software,  the Company  attempts to obtain  replacements
that it believes are Year 2000  compliant.  Utilizing both internal and external
resources  to  identify  and assess  needed Year 2000  remediation,  the Company
currently   anticipates   that  its  Year   2000   identification,   assessment,
remediation,  and  testing  efforts,  which  began  in  February  1998,  will be
completed by June 30, 1999, and that such efforts will be completed prior to any
currently anticipated impact on its computer equipment and software. The Company
estimates that as of March 31, 1999, it had completed  approximately  30% of the
initiatives  that it believes will be necessary to fully address  potential Year
2000 issues  relating to its  computer  equipment  and  software.  The  projects
comprising the remaining 70% of the  initiatives  are in process and expected to
be completed on or about June 30, 1999.

     The company is currently evaluating field service equipment, test equipment
and gauges at remote sites for Year 2000  compliance.  The  company's  Year 2000
identification,  assessment,  remediation,  and testing efforts will include the
current and future evaluation of all products,  equipment and gauges used in the
field.

     The  Company's  primary  systems are at less risk of date related  problems
due,  primarily,  to the fact that the average age of the systems is less than 5
years and were developed to operate beyond the year 2000.


                                                                   PERCENT
        YEAR 2000 INITIATIVE                     TIME FRAME        COMPLETE
        --------------------------------------  ------------  ------------------
        Initial IT systems identification and
        assessment............................    2/98-12/98          100%
        Remediation and testing regarding
        central system issues.................    8/98-5/99            85%
        Remediation and testing regarding
        departmental system issues............   10/98-4/99            90%


                                     - 12 -

<PAGE>


               Tanknology-NDE International, Inc. and Subsidiaries


                                                                   PERCENT
        YEAR 2000 INITIATIVE                     TIME FRAME        COMPLETE
        --------------------------------------  ------------  ------------------
        Remediation and testing regarding tank
        Testing and truck equipment system
        issues................................    11/98-6/99           45%
        Remediation and testing regarding
        telephone/PBX.........................    11/98-12/98         100%
        Electronic data interchange trading
        partner conversions...................    10/98-4/99           70%
        Identification, assessment, remediation,
        and testing regarding desktop and
        individual system issues..............    10/98-4/99           90%
        Identification and assessment regarding
        non-IT system issues..................     8/98-4/99           80%
        Remediation and testing regarding non-
        IT system issues......................    10/98-6/99           40%

     The Company has also mailed letters to its significant  vendors and service
providers and has verbally  communicated  with strategic  customers to determine
the extent to which  interfaces  with such entities are  vulnerable to Year 2000
issues and whether the products and services  purchased from or by such entities
are Year 2000 compliant.

     The  Company  believes  that  the  cost of its  Year  2000  identification,
assessment,  remediation and testing efforts,  as well as currently  anticipated
costs to be incurred by the  Company  with  respect to Year 2000 issues of third
parties,  will not  exceed  $150,000,  which  expenditures  will be funded  from
operating  cash  flows.  All of the  $150,000  relates  to  analysis,  repair or
replacement of existing software,  upgrades to existing software,  or evaluation
of  information  received  from  significant   vendors,   service  providers  or
customers. The Company presently believes that the Year 2000 issue will not pose
significant  operational  problems  for the Company.  However,  if all Year 2000
issues are not properly identified,  or assessment,  remediation and testing are
not effected  timely with  respect to Year 2000  problems  that are  identified,
there can be no assurance that the Year 2000 issue will not materially adversely
impact the Company's  results of  operations  or adversely  affect the Company's
relationships with customers, vendors or others.  Additionally,  there can be no
assurance  that the Year 2000 issues of other  entities will not have a material
adverse impact on the Company's systems or results of operations.

     The  Company  has not begun a  comprehensive  analysis  of the  operational
problems  that  would be  reasonably  likely to result  from the  failure by the
Company  and certain  third  parties to  complete  efforts to achieve  Year 2000
compliance on a timely  basis.  A  contingency  plan has not been  developed for
dealing with the most reasonably  likely worst case scenario,  and such scenario
has not yet been clearly  identified.  The Company  currently  plans to complete
such analysis and contingency planning by June 30, 1999.

     The Company  will engage an  independent  expert to evaluate  its Year 2000
identification, assessment, remediation, and testing efforts.

     This Form 10-Q contains  statements  which, to the extent that they are not
recitations of historical fact,  constitute  "forward looking statements" within
the meaning of Section 27A of the  Securities Act of 1933 and Section 21E of the
Securities  Exchange Act of 1934. All forward looking  statements  involve risks
and uncertainties.  The forward looking statements in this document are intended
to be subject to the safe harbor protection provided by Sections 27A and 21E.

                                     - 13 -

<PAGE>


               Tanknology-NDE International, Inc. and Subsidiaries


For a  discussion  identifying  some  important  factors that could cause actual
results to differ  materially  from those  anticipated  in the  forward  looking
statements,  see the Company's Form 10-KSB page 15 "Management's  Discussion and
Analysis or Result of Operations" for the fiscal year ended December 31, 1998.


PART II   Other Information

Item 6.   Exhibits and Reports on Form 8-K

     The following exhibits are filed herewith:


     No.       Exhibit
     -------   -----------------------------------------------------------------

     10.69     Amendment No. 6 to Loan  Agreement by and between  Tanknology-NDE
               International,  Inc. Tanknology-NDE  Corporation,  Tanknology-NDE
               Construction  Services,  inc., ProEco,  Inc., and 2368692 Canada,
               Inc. and Bank One, Texas, N.A.

     27.01     Selected Financial Data


     Reports on Form 8-K:
          None.





                                    SIGNATURE

     In accordance with the requirements of the Securities Exchange Act of 1934,
the  Registrant  has  caused  this  report  to be  signed  on its  behalf by the
undersigned, thereunto duly authorized.


                                           Tanknology-NDE International, Inc.
                                           (Registrant)

Date:     May 17, 1999                           /s/ A. DAN SHARPLIN
                                           -------------------------------------
                                           President and Chief Financial Officer


                                     - 14 -

<TABLE> <S> <C>


<ARTICLE>                     5
<LEGEND>
     This  schedule  contains  summary  financial   information  extracted  from
Tanknology-NDE International, Inc. financial statements as of and for the period
ended March 31, 1999.

</LEGEND>
<MULTIPLIER>                                   1


       

<S>                                        <C>
<PERIOD-TYPE>                              YEAR
<FISCAL-YEAR-END>                          Dec-31-1999
<PERIOD-START>                             Jan-01-1999
<PERIOD-END>                               Mar-31-1999
<CASH>                                         178,055
<SECURITIES>                                         0
<RECEIVABLES>                               14,468,230
<ALLOWANCES>                                 1,374,699
<INVENTORY>                                  1,216,332
<CURRENT-ASSETS>                            14,843,972
<PP&E>                                      22,022,668
<DEPRECIATION>                              14,039,656
<TOTAL-ASSETS>                              29,588,657
<CURRENT-LIABILITIES>                        9,104,522
<BONDS>                                     17,687,623
                        1,500,000
                                          0
<COMMON>                                         1,677
<OTHER-SE>                                   1,121,788
<TOTAL-LIABILITY-AND-EQUITY>                29,588,657
<SALES>                                     12,580,473
<TOTAL-REVENUES>                            12,580,473
<CGS>                                       10,829,692
<TOTAL-COSTS>                               13,734,251
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                             464,712
<INCOME-PRETAX>                             (1,535,739)
<INCOME-TAX>                                  (353,220)
<INCOME-CONTINUING>                         (1,182,519)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                (1,182,519)
<EPS-PRIMARY>                                    (0.07)
<EPS-DILUTED>                                    (0.07)
        

</TABLE>


                                                                   Exhibit 10.69

                        AMENDMENT NO. 6 TO LOAN AGREEMENT
                             DATED OCTOBER 25, 1996
               BY AND BETWEEN TANKNOLOGY-NDE INTERNATIONAL, INC.,
                           TANKNOLOGY/NDE CORPORATION,
                   TANKNOLOGY-NDE CONSTRUCTION SERVICES, INC.,
                      PROECO, INC. AND 2368692 CANADA, INC.
                                       AND
                              BANK ONE, TEXAS, N.A.


     This  Amendment No. 6 ("Sixth  Amendment")  to the Loan  Agreement,  by and
among  TANKNOLOGY-NDE  INTERNATIONAL,  INC. (formerly known as NDE ENVIRONMENTAL
CORPORATION)  ("NDE"), a Delaware  corporation,  TANKNOLOGY/ NDE CORPORATION,  a
Delaware corporation, PROECO, INC., a Delaware corporation, 2368692 CANADA, INC.
(formerly  known  as  TANKNOLOGY   CANADA  (1988)  INC.),  a  Canadian   federal
corporation, TANKNOLOGY-NDE CONSTRUCTION SERVICES, INC., a Delaware corporation,
and OUTBOUND SERVICES, INC., a California corporation (collectively, "Borrower")
and BANK ONE,  TEXAS,  N.A.,  a national  banking  association  (the  "Bank") is
entered into this 30th day of March 1999.

                              W I T N E S S E T H:

     WHEREAS,  Borrower and Bank entered into the Loan  Agreement on October 25,
1996,  as  amended  by the First  Amendment  dated  April 10,  1997,  the Second
Amendment  dated May 20, 1997, the Third  Amendment dated December 23, 1997, the
Fourth  Amendment  dated June 26, 1998 and the Fifth Amendment dated November 5,
1998 (the "Loan Agreement");

     WHEREAS,  Borrower  desires to increase the Revolving  Commitment under the
Loan
Agreement;

     WHEREAS,  Borrower  has  requested  that Bank  release  and  terminate  its
security interest in and to certain Collateral;

     WHEREAS,  Bank is willing to agree to the foregoing in accordance with, and
subject to, the terms and conditions set forth herein.

     NOW, THEREFORE, in consideration of the promises herein contained, and each
intending to be legally bound hereby, the parties agree as follows:

     I.   Amendments to Loan Agreement.

     Article I, DEFINITIONS, is amended by adding the following definitions:



                                        1

<PAGE>



          "Intangible  Assets"  means  all  the  assets  of  Borrower  that,  in
          accordance with GAAP, are not classified as tangible assets.

          "Ryder System Note" means that certain  promissory  note dated May 12,
          1998 executed by NDE in the face amount of $757,775.00 made payable to
          the order of Ryder System.

          "Sixth  Amendment"  means  Amendment  No.  6 to this  Loan  Agreement,
          executed by Borrower and Bank on March 30, 1999.

     Article I, DEFINITIONS, is amended by revising the following definitions in
their entirety to read as follows:

          "Adjusted  Net Worth" means  Consolidated  Net Worth minus  Intangible
          Assets plus Subordinated Debt, and outstanding principal under (i) the
          OSI Unsecured Note and (ii) the Ryder System Note.

          "Maximum Commitment Amount" $9,000,000.00 as of the date of the Fourth
          Amendment;  and  $12,500,000.00  upon  the  satisfaction  of  all  the
          conditions  under Article IV of the Sixth Amendment as acknowledged by
          Bank's  written  notice  to  Borrower  as  specified  under  Article V
          thereof.

          "Revolving  Note" means that certain  promissory  note in the original
          face  amount  of  $12,500,000.00  dated of even  date  with the  Sixth
          Amendment  made by  Borrower  payable  to the order of the Bank in the
          form attached as Exhibit "A-1" to the Sixth  Amendment,  together with
          all deferrals,  renewals,  extensions,  amendments,  modifications  or
          rearrangements  thereof,  which promissory note shall evidence certain
          advances to the  Borrower by the Bank  pursuant to Section 2.01 of the
          Loan Agreement.

     Article V, AFFIRMATIVE  COVENANTS,  of the Loan Agreement is hereby amended
by revising the following section in its entirety to read as follows:

          5.20 Net Worth  Requirement.  Maintain  its  Adjusted  Net Worth as of
          March 31,  1999,  which shall not be less than  $4,000,000.00  at that
          time, and each calendar  quarter  thereafter,  increasing on an annual
          basis by 70% of positive  annual Net Income  beginning the year ending
          December 31, 1999.

     "Exhibit A-1," the form of Revolving  Note attached to the Loan  Agreement,
as amended and restated  pursuant to the Third,  Fourth and Fifth  Amendments is
hereby replaced with Exhibit "A-1" attached to this Sixth Amendment.

     "Exhibit  B," the  form of  Compliance  Certificate  attached  to the  Loan
Agreement,  as  amended by the Third,  Fourth  and Fifth  Amendments,  is hereby
replaced with Exhibit "B" attached to this Sixth Amendment.


                                        2

<PAGE>



     "Schedule 1.01(a),  Collateral" attached to the Loan Agreement,  as amended
by the  Second,  Third,  Fourth,  and Fifth  Amendments,  is hereby  amended  by
deleting the reference to Pledged  Certificates of Deposit in subpart (b) at the
end of the section entitled "Tanknology-NDE International, Inc."

     "Schedule 3.10,  Collateral  Documents" attached to the Loan Agreement,  as
amended by the Fourth and Fifth Amendments,  is hereby further amended by adding
the following information to the identified subpart:

         3. Financing Statements:
                  Tanknology/NDE Corporation
                  FLORIDA: Secretary of State"

     II.  Conditions to the Effectiveness of the Sixth Amendment (Other than the
Increase in the Maximum Commitment  Amount). As a condition to the effectiveness
of the Sixth  Amendment,  other than the  increase  in the  Maximum  Commitment,
Borrower has satisfied the following conditions:

          A. Receipt of Amended and Restated  Revolving  Note,  Sixth  Amendment
     Certificate of Compliance and other Security Documents. The Bank shall have
     received  the  Amended  and  Restated  Revolving  Note (the  form  which is
     attached  hereto as Exhibit  "A-1"),  multiple  counterparts  of this Sixth
     Amendment  as  requested  by the  Bank,  the  Compliance  Certificate  duly
     executed by an  authorized  officer for each Borrower (the form of which is
     attached  hereto as Exhibit "B") and any other Security  Documents Bank may
     reasonably request.

          B. Receipt of Certified Copy of Corporate  Proceedings and Certificate
     of Incumbency of Borrower.  The Bank shall have received from each Borrower
     copies of all  resolutions  of its board of  directors  with respect to the
     transactions  set forth in this Sixth  Amendment  and the execution of this
     Sixth Amendment, such copy or copies to be certified by the Secretary or an
     Assistant  Secretary as being true and correct and in full force and effect
     as of the date hereof. In addition,  the Bank shall have received from each
     Borrower  a  certificate  of  incumbency  signed  by  the  Secretary  or an
     Assistant  Secretary setting forth (a) the names of the officers  executing
     this Sixth  Amendment,  (b) the  office(s)  to which such Persons have been
     elected  and in which they  presently  serve and (c) an  original  specimen
     signature of each such person.

          C.  Facility  Fee. As partial  consideration  for its agreement to the
     terms of the Sixth Amendment,  Bank shall have received $35,000.00 prior to
     or contemporaneous with the execution of the Sixth Amendment.



                                        3

<PAGE>



          D.  Borrower's  Opinion of  Counsel.  Bank shall  have  received  from
     counsel for Borrower a written  opinion in form and substance  satisfactory
     to Bank covering the matters set forth on Exhibit "C" attached to the Sixth
     Amendment.

          E.  Payment  of   Indebtedness.   Bank  shall  have  received  written
     authorization  and wiring  instructions (or other form of disbursement) for
     the  application  of proceeds from the  liquidation  of the  Certificate of
     Deposit  for  the  repayment  of  $3,000,000.00  of  outstanding  principal
     indebtedness of Borrower  evidenced by the Revolving Note, the Term Note or
     outstanding principal due under the Subordinated Indebtedness.

     III.  Release of  Collateral.  Upon the  satisfaction  of all the foregoing
conditions  precedent,  Bank shall execute and deliver to Borrower a release and
termination of that certain Pledge of Certificate of Deposit dated May 20, 1997,
by and among NDE (then known as NDE Environmental Corporation) and Bank.

     IV.  Conditions  to the  Effectiveness  of  the  Increase  in  the  Maximum
Commitment  Amount.  As a condition to the  effectiveness of the increase of the
Maximum Commitment, Borrower has satisfied the following conditions:

          A.  Receipt  of  the  Certified  Copy  of  Corporate  Proceedings  and
     Certificate of Incumbency of DH Holdings.  Bank shall have received from DH
     Holdings  Corp.  ("DHH"),  copies  of all  resolutions  of their  boards of
     directors with respect to the  transactions  contemplated by the this Sixth
     Amendment and the Second Amendment to the  Intercreditor  and Subordination
     Agreement,  such copy or  copies to be  certified  by the  Secretary  or an
     Assistant  Secretary as being true and correct and in full force and effect
     as of the date hereof. In addition, the Bank shall have received from DHH a
     certificate of incumbency signed by the Secretary or an Assistant Secretary
     setting forth (a) the names of the officers  executing the Second Amendment
     to the  Intercreditor  and  Subordination  Agreement,  (b) the office(s) to
     which such Persons have been elected and in which they presently  serve and
     (c) an original specimen signature of each such person.

          B. Receipt of the Second Amendment to Intercreditor  and Subordination
     Agreement.  Borrower,  DHH  and  Bank  shall  have  entered  into a  Second
     Amendment  to  Intercreditor  and  Subordination  Agreement in the form and
     substance satisfactory to Bank.

          C.  Receipt of the Third  Amended and  Restated  Standby  Commitment.
     Bank, Borrower and Proactive Partners, L.P. shall have entered into a Third
     Amended  and  Restated  Standby   Commitment  in  the  form  and  substance
     satisfactory to Bank.

     V. Written Notice to Borrower of  Satisfaction of Conditions to Increase in
Maximum Commitment Amount.  Upon the satisfaction of the conditions as set forth
in Article  IV hereof and  provided  no  Unmatured  Event of Default or Event of
Default has occurred and is continuing,  Bank shall contemporaneously  provide a
letter of notice to Borrower stating "Bank One, Texas, N.A. is satisfied that


                                        4

<PAGE>



the  conditions  set forth in Article IV of the Sixth  Amendment to that certain
Loan  Agreement  dated  October  25,  1996,  among  the Bank and  Tanknology-NDE
International,   Inc.  et  al.  have  been  fulfilled,"  whereupon  the  Maximum
Commitment Amount shall equal $12,500,000.00.

     VI.  Reaffirmation  of  Representations  and Warranties.  To induce Bank to
enter into this  Sixth  Amendment,  Borrower  hereby  reaffirms,  as of the date
hereof, its representations  and warranties  contained in Article IV of the Loan
Agreement, as amended, and in all other documents executed pursuant thereto, and
additionally represents and warrants as follows:

          A.  The  execution  and  delivery  of  this  Sixth  Amendment  and the
     performance by Borrower of its  obligations  under this Sixth Amendment are
     within  the  Borrower's   corporate  power,  have  received  all  necessary
     governmental  approval (if any shall be required),  and do not and will not
     contravene  or  conflict  with  any  provision  of law or of any  agreement
     binding upon the Borrower.

          B. The Loan Agreement, as amended by this Sixth Amendment,  represents
     the legal, valid and binding  obligations of Borrower,  enforceable against
     Borrower in  accordance  with its terms subject as to  enforcement  only to
     bankruptcy,  insolvency,  reorganization,  moratorium or other similar laws
     affecting  the  enforcement  of  creditors'  rights  generally  and general
     principles of equity.

          C. No Event of Default or Unmatured  Event of Default has occurred and
     is continuing as of the date hereof.

     VII.  Defined Terms.  Except as amended hereby,  terms used herein that are
defined in the Loan Agreement shall have the same meanings herein.

     VIII. Reaffirmation of Loan Agreement. This Sixth Amendment shall be deemed
to be an amendment to the Loan  Agreement,  and the Loan  Agreement,  as amended
hereby,  is hereby  ratified,  approved and confirmed in each and every respect.
All  references  to  the  Loan  Agreement  herein  and in  any  other  document,
instrument,  agreement or writing shall hereafter be deemed to refer to the Loan
Agreement as amended hereby.

     IX. Entire Agreement.  The Loan Agreement, as hereby amended,  embodies the
entire agreement  between Borrower and Bank, and supersedes all prior proposals,
agreements and  understandings  relating to the subject matter hereof.  Borrower
certifies  that  it is  relying  on no  representation,  warranty,  covenant  or
agreement except for those set forth in the Loan Agreement as hereby amended and
the other documents previously executed or executed of even date herewith.

     X. Governing Law. THIS SIXTH  AMENDMENT  SHALL BE GOVERNED BY AND CONSTRUED
IN ACCORDANCE WITH THE LAWS OF THE STATE OF TEXAS AND THE APPLICABLE LAWS OF THE
UNITED STATES OF AMERICA.  This Sixth  Amendment has been entered into in Harris
County, Texas, and it shall be performable for all purposes in Harris County,


                                        5

<PAGE>



Texas. Courts within the State of Texas shall have jurisdiction over any and all
disputes between Borrower and Bank, whether in law or equity, including, but not
limited  to,  any and all  disputes  arising  out of or  relating  to this Sixth
Amendment or any other Loan Document;  and venue in any such dispute  whether in
federal or state court shall be laid in Harris County, Texas.

     XI. Severability.  Whenever possible each provision of this Sixth Amendment
shall  be  interpreted  in  such  manner  as to be  effective  and  valid  under
applicable law, but if any provision of this Sixth Amendment shall be prohibited
by or invalid under  applicable  law, such provision shall be ineffective to the
extent of such prohibition or invalidity,  without invalidating the remainder of
such provision or the remaining provisions of this Sixth Amendment.

     XII. Execution in Counterparts. This Sixth Amendment may be executed in any
number of counterparts  and by the different  parties on separate  counterparts,
and each  such  counterpart  shall be  deemed  to be an  original,  but all such
counterparts shall together constitute but one and the same agreement.

     XIII.  Section Captions.  Section captions used in this Sixth Amendment are
for convenience of reference only, and shall not affect the construction of this
Sixth Amendment.

     XIV. Successors and Assigns. This Sixth Amendment shall be binding upon the
Borrower and Bank and their respective  successors and assigns,  and shall inure
to the benefit of the  Borrower  and Bank,  and the  respective  successors  and
assigns of Bank.

     XV. Non-Application of Chapter 346 of Texas Finance Code. The provisions of
Chapter 346 of the Texas Finance Code are  specifically  declared by the parties
hereto not to be  applicable to the Loan  Agreement as hereby  amended or any of
the other Loan Documents or to the transactions contemplated hereby.

     XVI. Notice.  THIS SIXTH AMENDMENT TOGETHER WITH THE LOAN AGREEMENT AND THE
OTHER LOAN DOCUMENTS  REPRESENT THE FINAL AGREEMENT  BETWEEN THE PARTIES AND MAY
NOT BE  CONTRADICTED  BY EVIDENCE OF PRIOR,  CONTEMPORANEOUS  OR SUBSEQUENT ORAL
AGREEMENTS OF THE PARTIES.  THERE ARE NO UNWRITTEN ORAL  AGREEMENTS  BETWEEN THE
PARTIES.




                                        6

<PAGE>



     IN WITNESS WHEREOF,  the parties hereto have caused this Sixth Amendment to
be duly executed as of the day and year first above written.


                                         BORROWER:

                                         TANKNOLOGY-NDE INTERNATIONAL, INC.
                                         (formerly known as NDE ENVIRONMENTAL
                                         CORPORATION)


                                         By:
                                                  Jay Allen Chaffee
                                                  Chairman of the Board


                                         TANKNOLOGY/NDE CORPORATION


                                         By:
                                                  Jay Allen Chaffee
                                                  Chairman of the Board


                                         TANKNOLOGY-NDE CONSTRUCTION
                                         SERVICES, INC.


                                         By:
                                                  Jay Allen Chaffee
                                                  Chairman of the Board

                                         PROECO, INC.


                                         By:
                                                  Jay Allen Chaffee
                                                  Chairman of the Board





                                        7

<PAGE>



                                         2368692 CANADA, INC. (formerly known as
                                         TANKNOLOGY CANADA (1988) INC.)


                                         By:
                                                  Jay Allen Chaffee
                                                  President


                                         OUTBOUND SERVICES, INC.


                                         By:
                                                  Jay Allen Chaffee
                                                  Chairman of the Board


                                         BANK:

                                         BANK ONE, TEXAS, N.A.


                                         By:
                                                    Lisa Kasling
                                                    Senior Vice President


                                        8

<PAGE>



                                  EXHIBIT "A-1"

                       AMENDED AND RESTATED REVOLVING NOTE

$12,500,000.00                                                    March 30, 1999


     FOR VALUE RECEIVED,  TANKNOLOGY-NDE INTERNATIONAL,  INC. (formerly known as
NDE ENVIRONMENTAL  CORPORATION) ("NDE"), a Delaware corporation,  TANKNOLOGY/NDE
CORPORATION,  a Delaware  corporation,  PROECO,  INC.,  a Delaware  corporation,
2368692  CANADA,  INC.  (formerly  known as TANKNOLOGY  CANADA  (1988) INC.),  a
Canadian federal  corporation,  TANKNOLOGY- NDE CONSTRUCTION  SERVICES,  INC., a
Delaware corporation, and OUTBOUND SERVICES, INC., a California corporation, all
of the foregoing having an address at 8900 Shoal Creek, Bldg. 200, Austin, Texas
78757 (collectively,  "Borrower") unconditionally promise to pay to the order of
BANK ONE, TEXAS, NATIONAL ASSOCIATION, (herein called "Bank"), at its offices at
910 Travis,  Houston,  Texas 77001,  the  principal  sum of TWELVE  MILLION FIVE
HUNDRED  THOUSAND  DOLLARS  ($12,500,000.00)  or, if less, the aggregate  unpaid
principal  amount of all Revolving Loans (as defined in the Loan Agreement) made
by the Bank to the  Borrower  pursuant  to the Loan  Agreement,  as shown in the
records of the Bank, outstanding on such date.

     The undersigned also promise to pay interest on the unpaid principal amount
hereof  from  time to time  outstanding  from the  date  hereof  until  maturity
(whether by acceleration  or otherwise) and, after maturity,  until paid, at the
rates  per annum and on the dates  specified  in the Loan  Agreement;  provided,
however,  that in no event  shall  such  interest  exceed the  Maximum  Rate (as
hereinafter defined).

     "Maximum Rate" means the Maximum Rate of  non-usurious  interest  permitted
from day to day by Applicable Law.

     "Applicable  Law" means that law in effect from time to time and applicable
to this Revolving Note which lawfully permits the charging and collection of the
highest  permissible  lawful,  non-usurious  rate of interest on this  Revolving
Note. To the extent federal law permits Bank to contract for,  charge or receive
a greater amount of interest, Bank will rely on federal law instead of the Texas
Finance Code for the purpose of determining the Maximum Rate.  Additionally,  to
the maximum extent permitted by applicable law now or hereafter in effect,  Bank
may,  at its  option  and from  time to time,  implement  any  other  method  of
computing  the  Maximum  Rate  under  the  Texas  Finance  Code or  under  other
applicable law, by giving notice, if required, to Borrower as provided by



                                                                  --------------
                                                                     Initial for
                                                                  Identification
                                       A-1

<PAGE>



applicable  law now or  hereafter  in effect.  Notwithstanding  anything  to the
contrary  contained herein or in any of the other Loan Documents,  it is not the
intention  of Bank to  accelerate  the  maturity  of any  interest  that has not
accrued at the time of such  acceleration or to collect unearned interest at the
time of such acceleration.

     In no event shall  Chapter 346 of the Texas  Finance Code (which  regulates
certain revolving loan accounts and revolving  tri-party accounts) apply to this
Note.  To the extent that Chapter 303 of the Texas Finance Code is applicable to
this Note, the "weekly ceiling"  specified in such Chapter 303 is the applicable
ceiling;  provided that, if any applicable law permits greater interest, the law
permitting the greatest interest shall apply.

     In no event shall the  aggregate  of the  interest  on this Note,  plus any
other  amounts  paid in  connection  with the loan  evidenced by this Note which
would under Applicable Law be deemed  "interest," ever exceed the maximum amount
of interest which, under Applicable Law, could be lawfully charged on this Note.
The Bank and the Borrower  specifically  intend and agree to limit contractually
the interest  payable on this Note to not more than an amount  determined at the
Maximum Rate. Therefore, none of the terms of this Note or any other instruments
pertaining to or securing this Note shall ever be construed to create a contract
to pay  interest  at a rate in excess  of the  Maximum  Rate,  and  neither  the
Borrower nor any other party liable herefor shall ever be liable for interest in
excess of that  determined  at the  Maximum  Rate,  and the  provisions  of this
paragraph  shall  control  over  all  provisions  of this  Note or of any  other
instruments pertaining to or securing this Note. If any amount of interest taken
or  received  by the Bank shall be in excess of the  maximum  amount of interest
which,  under  Applicable  Law, could lawfully have been collected on this Note,
then the excess shall be deemed to have been the result of a mathematical  error
by the  parties  hereto and shall be  refunded  promptly  to the  Borrower.  All
amounts paid or agreed to be paid in connection with the indebtedness  evidenced
by this Note which would under Applicable Law be deemed "interest" shall, to the
extent permitted by Applicable Law, be amortized, prorated, allocated and spread
throughout the full term of this Note.

     This Note is the  Revolving  Note  referred  to in and is  entitled  to the
benefits of a certain Loan  Agreement,  dated as of October 25, 1996, as amended
by that First Amendment  dated April 10, 1997,  that Second  Amendment dated May
20, 1997,  that Third  Amendment  dated December 23, 1997, the Fourth  Amendment
dated June 26, 1998,  the Fifth  Amendment  dated November 5, 1998 and the Sixth
Amendment  dated of even  date  herewith  (as the same may be  further  amended,
modified, supplemented,  extended, rearranged and/or restated from time to time,
the "Loan Agreement"),  entered into by and among Tanknology-NDE  International,
Inc., (f/k/a NDE Environmental  Corporation) et al., as Borrower,  and Bank One,
Texas,  National  Association  and secured by the Collateral  Documents (as such
term is defined in the Loan  Agreement).  Reference  is hereby  made to the Loan
Agreement for a statement of the prepayment rights and penalties and obligations



                                                                  --------------
                                                                     Initial for
                                                                  Identification
                                       A-2

<PAGE>



of  the  Borrower,  a  description  of  the  properties  and  assets  mortgaged,
encumbered and assigned, the nature and extent of the security and the rights of
the parties to the Collateral  Documents in respect of such security,  and for a
statement of the terms and conditions  under which the due date of this Note may
be accelerated.  Upon the occurrence of any Event of Default as specified in the
Loan Agreement, the principal balance hereof and the interest accrued hereon may
be  declared  to be  forthwith  due and  payable  in  accordance  with  the Loan
Agreement,  and any  indebtedness  of the holder  hereof to the  Borrower may be
appropriated and applied hereon.

     In addition to and not in  limitation  of the  foregoing,  the  undersigned
further agrees, subject only to any limitation imposed by applicable law, to pay
all  reasonable  expenses,   including  reasonable  attorneys'  fees  and  legal
expenses,  incurred  by the holder of this Note in  endeavoring  to collect  any
amounts payable  hereunder which are not paid when due,  whether by acceleration
or otherwise.

     All parties hereto, whether as makers,  endorsees, or otherwise,  severally
waive presentment for payment,  demand, protest, notice of intent to accelerate,
notice of acceleration and notice of dishonor.

     This Note is issued in substitution for, and in replacement,  modification,
rearrangement,  renewal  and  extension  of, but not in  extinguishment  of, the
outstanding   principal   indebtedness   evidenced   by  that  certain  note  of
Tanknology-NDE  International,   Inc.  (f/k/a  NDE  Environmental  Corporation),
Tanknology/NDE   Corporation,   ProEco,   Inc.,  2368692  Canada,  Inc.  (f/k/a/
Tanknology Canada (1988) Inc.) and Tanknology-NDE  Construction Services,  Inc.,
dated  October 25, 1996,  payable to the order of Bank One,  Texas,  N.A. in the
original principal sum of $5,000,000.00,  as amended and restated by the Second,
Third, Fourth and Fifth Amendments (the "Prior Note"); it being acknowledged and
agreed by Borrower that the indebtedness  evidenced by this Note consti tutes an
extension and renewal of the outstanding principal indebtedness evidenced by the
Prior Note,  and that all  security  interests  and other liens which secure the
repayment of the Prior Note shall continue to secure the indebtedness  evidenced
by this Note.

     THIS NOTE SHALL BE DEEMED TO BE A CONTRACT MADE UNDER THE LAWS OF THE STATE
OF TEXAS  AND  CONSTRUED  IN  ACCORDANCE  WITH THE LAWS OF THE  STATE OF  TEXAS,
WITHOUT REGARD TO PRINCIPLES OF CONFLICTS OF LAW.



                                       A-3

<PAGE>



     EXECUTED this 30th day of March, 1999.

                                         MAKER:

                                         TANKNOLOGY-NDE INTERNATIONAL, INC.
                                         (formerly known as NDE ENVIRONMENTAL
                                         CORPORATION)


                                         By:
                                                  Jay Allen Chaffee
                                                  Chairman of the Board


                                         TANKNOLOGY/NDE CORPORATION


                                         By:
                                                  Jay Allen Chaffee
                                                  Chairman of the Board


                                         PROECO, INC.


                                         By:
                                                  Jay Allen Chaffee
                                                  Chairman of the Board


                                         2368692 CANADA, INC. (formerly known as
                                         TANKNOLOGY CANADA (1988) INC.)


                                         By:
                                                  Jay Allen Chaffee
                                                  President


                                       A-4

<PAGE>



                                         TANKNOLOGY-NDE CONSTRUCTION
                                         SERVICES, INC.


                                         By:
                                                  Jay Allen Chaffee
                                                  Chairman of the Board


                                         OUTBOUND SERVICES, INC.


                                         By:
                                                  Jay Allen Chaffee
                                                  Chairman of the Board



                                       A-5

<PAGE>



                                   EXHIBIT "B"

                             Compliance Certificate


     I,  ______________________,  the _______________________ of TANKNOLOGY- NDE
INTERNATIONAL,  INC.  (the  "Company"),  pursuant  to  Section  5.05 of the Loan
Agreement  dated as of October 25, 1996, as amended by the First Amendment dated
April 10, 1997, the Second  Amendment  dated May 20, 1997,  the Third  Amendment
dated  December 23, 1997,  the Fourth  Amendment  dated June 26, 1998, the Fifth
Amendment dated November 5, 1998 and the Sixth Amendment dated March 30, 1999 by
and  among  BANK  ONE,  TEXAS,  N.A.  ("Bank")  and  the  Company  et  al.  (the
"Agreement") do hereby certify, as of the date hereof, that to my knowledge:

         1.    No Event of Default (as defined in the  Agreement)  has  occurred
               and is continuing,  and no Unmatured Event of Default (as defined
               in the Agreement)  has occurred and is continuing  except for the
               following events (include actions taken to cure such situations);

         2.    No  material  adverse  change  has  occurred  in  the  condition,
               financial or otherwise, of the Company since ________________;

         3.    Except as  otherwise  stated in the  Schedule,  if any,  attached
               hereto, each of the representations and warranties of the Company
               contained  in Article IV of the  Agreement is true and correct in
               all respects; and

         4.    The Company's financial condition for the month ending __________
               is as follows:

<TABLE>
<CAPTION>

      Financial Covenant          Time Period    Required Ratio                                         Actual Ratio
<S>                               <C>            <C>                                                    <C>
================================  ============   =====================================================  ============================
(a)  Adjusted Net Worth           Term of Loan   Not less than the Adjusted Net Worth as of 3/31/99,
                                                 which shall not be less than $4,000,000.00, and each
                                                 calendar quarter thereafter, increasing on an annual
                                                 basis by 70% of Borrower's annual Net Income (if
                                                 positive) beginning the year ending 12/31/99.

(b)  Capital  Expenditures        Term  of Loan  Not more than $6,800,000 for fiscal 1998 and  
                                                 $2,000,000 for each year thereafter.

(c)  Debt Service Coverage Ratio  Term of Loan   Not less than 1.2 to 1.0

(d)  Adjusted  Liabilities  to    Term of Loan   9/30/98 - 3/31/99 not more than 2.25 to 1.0;  
     Adjusted Net Worth                          4/1/99 - 6/30/99 not more than 2.00 to 1.0; 
                                                 7/1/99 - 3/31/2000 not more than 1.75 to 1.0;  
                                                 4/1/2000 - 9/30/2000  not more  than  1.25  to  1.0; 
                                                 and after  9/30/2000  not more than 1.0 to 1.0.
================================  ============   =====================================================  ============================
</TABLE>

This certificate is executed this ___ day of ___________ 199__.


                                         TANKNOLOGY-NDE INTERNATIONAL, INC.




                                         By:
                                         Its:



                                       B-1

<PAGE>


                                   EXHIBIT "C"

                     Form of Opinion of Counsel for Borrower
                              Baker & Botts, L.L.P.


     (1) The Borrower and the  Subsidiaries  are  corporations  duly  organized,
existing,  and in good  standing  under the Laws of their  respective  states of
incorporation  [naming such states] and are  qualified to transact  business and
are in good  standing in those  states  where the nature of business or property
owned by them requires  qualification,  as set forth in Schedule 4.01,  attached
hereto and made a part hereof,  and, to the knowledge of such  counsel,  are not
required to be qualified as a foreign corporation in any other jurisdiction;

     (2) The Borrower has the power to execute and deliver this Sixth Amendment,
to borrow  money  hereunder,  to grant the  Collateral  required  hereunder,  to
execute and deliver the Amended and  Restated  Revolving  Note,  and  Collateral
Documents, and to perform its obligations hereunder and thereunder;

     (3) All corporate actions by the Borrower and all consents and approvals of
any Persons  necessary to the validity of this Sixth Amendment,  the Amended and
Restated Revolving Note, the Collateral Documents, and each other document to be
delivered hereunder have been duly taken or obtained,  and this Sixth Amendment,
Amended and Restated  Revolving  Note,  and the Collateral  Documents,  and such
other  documents do not conflict with any provision of the charter or by-laws of
the Borrower,  or of any  applicable  Laws, or any other  agreement  binding the
Borrower or its property of which,  after reasonable  inquiry,  such counsel has
knowledge; and

     (4) This Sixth  Amendment,  the Amended and Restated  Revolving  Note,  and
Collateral  Documents to be delivered  hereunder have been duly executed by, and
each is a valid and binding  obligation of, the Borrower;  each of the foregoing
documents is in all respects sufficient to achieve its purported function and is
enforceable  in  accordance  with its terms,  except as  limited by  bankruptcy,
insolvency,   reorganization,   moratorium,  or  other  similar  laws  affecting
creditors' rights generally or by general equitable principles.


                                       C-1


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