GROUNDWATER TECHNOLOGY INC
S-4, 1996-04-05
HAZARDOUS WASTE MANAGEMENT
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      As filed with the Securities and Exchange Commission on April 4, 1996
                                                 Registration No. 333-
================================================================================
                       SECURITIES AND EXCHANGE COMMISSION
                              WASHINGTON, DC 20549

                                    FORM S-4
                             REGISTRATION STATEMENT

                        UNDER THE SECURITIES ACT OF 1933

                          GROUNDWATER TECHNOLOGY, INC.
             (EXACT NAME OF REGISTRANT, AS SPECIFIED IN ITS CHARTER)

         Delaware                       8748                     02-0324047
(state or other jurisdiction    (Primary Standard             (I.R.S. Employer
   of incorporation or        Industrial Classification      Identification No.)
      organization)                 Code Number)

                              100 River Ridge Drive
                          Norwood, Massachusetts 02062
                                 (617) 769-7600

    (Address, including ZIP code, and telephone number, including area code,
                  of registrant's principal executive offices)

                            BRIAN D. GOLDSTEIN, ESQ.
                              100 RIVER RIDGE DRIVE
                          NORWOOD, MASSACHUSETTS 02062
                                 (617) 769-7600

 (Name, address, including ZIP code, and telephone number, including area code,
                              of agent for service)
                                   COPIES TO:

                           ANDREW E. TAYLOR, JR., ESQ.
                           Testa, Hurwitz & Thibeault
                       125 High Street, High Street Tower
                                Boston, MA 02110
                                 (617) 248-7000

         APPROXIMATE  DATE OF COMMENCEMENT OF PROPOSED SALE OF THE SECURITIES TO
THE PUBLIC:  As soon as practicable  after this  Registration  Statement becomes
effective and certain other conditions under the applicable merger agreement are
met or waived.

         If the  securities  being  registered on this form are being offered in
connection  with the formation of a holding company and there is compliance with
General Instruction G, check the following box.  ___

<PAGE>
                         CALCULATION OF REGISTRATION FEE

================================================================================


<TABLE>
<CAPTION>

Title of Each Class of       Amount to be         Proposed Maximum        Proposed Maximum           Amount of
   Securities to be       Registered (Shares)    Offering Price (2)      Aggregate Offering    Registration Fee (3)
      Registered                  (1)                                        Price (2)



<S>                            <C>                 <C>                      <C>                       <C>    
  Common Stock, $.001          8,076,347           Not Applicable           $71,926,021               $24,802
       par value
</TABLE>


(1)      Based upon an estimate  of the  maximum  number of shares of the Common
         Stock of the  Registrant,  $.001 par value per share,  issuable  in the
         transactions  described herein to holders of shares of capital stock of
         the Registrant and to Fluor Daniel, Inc.
(2)      Estimated  solely for the purpose of calculating the  registration  fee
         pursuant to Rule 457(f) under the  Securities  Act of 1933,  as amended
         (the "Securities  Act"), and calculated as the sum of (a) the number of
         shares of Common Stock of the Registrant  being  cancelled  (6,970,701)
         multiplied by the average high and low prices as reported on the Nasdaq
         National   Market  Listing  on  March  28,  1996  ($13.50),   plus  (b)
         $33,350,000 to be paid to the  Registrant,  less (c)  $60,087,443 to be
         paid by the Registrant to its stockholders,  plus (d) the book value of
         the shares to be received by the Registrant ($4,559,000).
(3)      A fee of $11,500 was previously paid by the Registrant pursuant to Rule
         14a-6  promulgated  under  the  Securities  Exchange  Act of  1934,  as
         amended,  in  connection  with  the  filing  of the  preliminary  Proxy
         Statement/Prospectus on February 7, 1996, and the Company has a current
         balance with the  Commission of $764.64.  Pursuant to Rule 457(b) under
         the Securities Act, such fee and balance are being credited against the
         registration fee, and, accordingly, an additional $12,538 is being paid
         in connection with this Registration Statement.

The Registrant hereby amends this  Registration  Statement on such date or dates
as may be necessary to delay its effective date until the registrant  shall file
a further amendment which specifically  states that this Registration  Statement
shall  thereafter  become  effective  in  accordance  with  Section  8(a) of the
Securities  Act of  1933  or  until  the  Registration  Statement  shall  become
effective on such date as the Commission,  acting pursuant to said Section 8(a),
may determine.

<PAGE>


                          GROUNDWATER TECHNOLOGY, INC.
                 Cross-Reference Sheet Showing Locations in the
         Prospectus of the Responses to the Items of From S-4 (Pursuant
                        to Item 501(b) of Regulation S-K)
<TABLE>
<CAPTION>

             Form S-4 Item Number and Caption                                Location in Prospectus
             --------------------------------                                ----------------------
<S>                                                         <C>    
A.   INFORMATION ABOUT THE TRANSACTION

1.   Forepart of Registration Statement and
     Outside Front Cover Page of Prospectus............      Facing Page; Cross Reference Sheet; Outside
                                                             Front Cover Page of Proxy
                                                             Statement/Prospectus
2    Inside Front and Outside Back Cover Pages
     of Prospectus.....................................      Inside Front Cover Page of Proxy
                                                             Statement/Prospectus; Available Information
3.   Risk Factors, Ratio of Earnings to Fixed
     Charges and Other Information.....................      Summary; Risk Factors; Selected Historical
                                                             and Pro Forma Financial Data; Comparative
                                                             Per Share Data

4.   Terms of the Transaction..........................      Summary; The Transactions; The Investment 
                                                             Agreement; The Marketing Agreement; Certain
                                                             Federal Income Tax Considerations

5.   Pro Forma Financial Information...................      Unaudited Pro Forma Financial Information

6.   Material Contacts with the Company Being
     Acquired..........................................      Summary; The Transactions

7.   Additional Information Required for
     Reoffering by Persons and Parties Deemed
     to be Underwriters................................      Not Applicable

8.   Interests of Named Experts and Counsel............      Legal Matters; Experts; Opinion of Financial
                                                             Advisor
9.   Disclosure of Commission Position on
     Indemnification for Securities Act
     Liabilities.......................................      Not Applicable

B.  INFORMATION ABOUT THE REGISTRANT

10.  Information with Respect to S-3 Registrants.......      Available Information; Incorporation by
                                                             Reference; Summary; Selected Historical
                                                             Financial Data and Summary Unaudited Pro
                                                             Forma Financial Information

11.   Incorporation of Certain Information by
      Reference........................................      Summary; Available Information;
                                                             Incorporation by Reference
</TABLE>


<PAGE>



<TABLE>
<S>                                                         <C>

12.   Information with Respect to S-2 or S-3
      Registrants......................................      Not Applicable

13.   Incorporation of Certain Information by
      Reference........................................      Not Applicable

14.   Information with Respect to Registrants
      Other Than S-2 or S-3 Registrants................      Not Applicable

C.  INFORMATION ABOUT THE COMPANY BEING ACQUIRED

15.   Information with Respect to S-3 Companies........      Not Applicable

16.   Information with Respect to S-2 or S-3
      Companies........................................      Not Applicable

17.   Information with Respect to Companies
      Other Than S-2 or S-3 Companies..................      Summary; Information with Respect to
                                                             FDESI; Financial Statements; Fluor Daniel
                                                             Environmental Services, Inc. Selected
                                                             Financial Data; Management's Discussion and
                                                             Analysis of Financial Condition and Results
                                                             of Operations of FDESI; Market Price,
                                                             Dividends, Holders of Capital Stock

D.  VOTING AND MANAGEMENT INFORMATION

18.  Information if Proxies, Consents or
     Authorizations Are to be Solicited................      Outside Front Cover Page of Proxy
                                                             Statement/Prospectus; Incorporation by
                                                             Reference; Summary; The Transactions;
                                                             Share Ownership of GTI Management and
                                                             Principal Holders

19.  Information if Proxies, Consents or
     Authorizations Are Not to be Solicited in an
     Exchange Offer....................................      Not Applicable
</TABLE>

                                       2

<PAGE>

[LOGO]
GROUNDWATER
TECHNOLOGY(R)
                                                              April 5, 1996

DEAR STOCKHOLDER:

    You are cordially  invited to attend the Special  Meeting of Stockholders of
Groundwater Technology,  Inc. ("GTI" or the "Company") to be held on Friday, May
10,  1996 at 9:30  a.m.,  at the  Courtyard  Marriott,  300 River  Ridge  Drive,
Norwood, Massachusetts.

    At the  Special  Meeting,  you  will be  asked to  consider  and  vote  upon
transactions  which will create an alliance  between GTI and Fluor Daniel,  Inc.
("Fluor") as set forth in an  Investment  Agreement  signed on December 11, 1995
(the  "Transactions").  Specifically,  pursuant to the Investment  Agreement,  a
newly created wholly-owned  subsidiary of GTI will be merged with and into Fluor
Daniel  Environmental  Services,  Inc. ("FDESI"),  a wholly-owned  subsidiary of
Fluor  (the  "Merger").  Immediately  prior to the  Merger,  GTI  will  effect a
recapitalization (the "Recapitalization")  whereby each outstanding share of GTI
Common Stock, $.01 par value ("Common  Stock"),  will be converted into $8.62 in
cash and .5274 of a share of new  common  stock,  $.001 par value  ("New  Common
Stock").  The shares of New Common  Stock will be listed on the Nasdaq  National
Market  under the symbol  "FDGT"  and will be  substantially  identical  to your
current shares of Common Stock,  except for the change in par value to $.001 per
share. Following the Merger, FDESI will be a wholly-owned subsidiary of GTI, and
GTI will be renamed  "Fluor  Daniel GTI,  Inc." to  emphasize  the  relationship
between GTI and Fluor.

    In the Merger,  GTI will  receive all  outstanding  FDESI  shares and $33.35
million in cash.  In exchange for its FDESI shares and its cash  payment,  Fluor
will receive 4,400,000 shares of New Common Stock. In the Recapitalization,  GTI
stockholders will receive in the aggregate approximately $60 million in cash and
3,676,347 shares of New Common Stock.

    Immediately   after  the  Merger  and   Recapitalization,   Fluor  will  own
approximately 55% and current GTI stockholders will own approximately 45% of the
Company,  and the Company  will be governed by a Board  comprised of the current
President and Chief Executive  Officer of GTI, three members of Fluor management
and three independent directors.  Two of the independent directors are currently
directors of GTI, and one has been  designated  by Fluor.  In addition,  GTI and
Fluor will enter into a Marketing  Agreement  encompassing their arrangements to
coordinate certain marketing,  business opportunities and support services after
the Transactions.

    The  Investment  Agreement  is the  result of careful  consideration  of the
Company's strategic alternatives by management and its Board of Directors.  Your
Board  unanimously  believes  that  the  affiliation  with  Fluor is in the best
interests  of the Company and its  stockholders.  The cash  payment of $8.62 per
share provides  stockholders with an immediate return on their investment in GTI
at a fair price.  The Board views the  Transactions  as, in effect,  a means for
stockholders to sell  approximately 47% of their shares of Common Stock for cash
at an effective  per share price of  approximately  $18.25 and to retain  (after
taking into  account the  issuance of New Common  Stock to Fluor)  ownership  of
approximately  45% of the Company and thus be able to  participate in its future
growth.  The prospects for that growth should be enhanced by the  acquisition of
FDESI and the  affiliation  with Fluor as a majority  stockholder  and  business
partner.

    In considering and voting on the  Transactions at the Special  Meeting,  you
are being asked to approve the Amended and Restated Certificate of Incorporation
effecting,  among other things, the Recapitalization and the change of corporate
name, to approve certain  amendments to GTI's By-Laws  required  pursuant to the
Investment  Agreement,  to approve the  issuance of New Common Stock to Fluor in
the  Merger,   to  elect  the  directors  to  serve  upon  consummation  of  the
Transactions,  to approve the  treatment  and  disposition  of stock options and
rights  outstanding under, and certain amendments to, GTI's existing stock plans
in connection with the  Transactions,  and to approve and to transact such other
business, if any, as may properly come before the Special Meeting.

<PAGE>

    YOUR BOARD OF DIRECTORS UNANIMOUSLY RECOMMENDS THAT YOU VOTE FOR APPROVAL OF
THE  TRANSACTIONS,  WHICH  SHALL  CONSTITUTE  YOUR  APPROVAL  OF THE AMENDED AND
RESTATED CERTIFICATE OF INCORPORATION,  THE AMENDED BY-LAWS, THE ISSUANCE OF NEW
COMMON  STOCK  TO  FLUOR,  THE  ELECTION  OF  DIRECTORS  AND THE  TREATMENT  AND
DISPOSITION  OF  OUTSTANDING   STOCK  OPTIONS  AND  RIGHTS  UNDER,  AND  CERTAIN
AMENDMENTS TO, GTI'S EXISTING STOCK PLANS IN CONNECTION WITH THE TRANSACTIONS.

    The  accompanying  Proxy  Statement/Prospectus,  which you are urged to read
carefully,  provides important detailed information  concerning the Transactions
and the Special Meeting.  Whether or not you plan to attend the Special Meeting,
please  complete,  date and sign your proxy card and  promptly  return it in the
enclosed  envelope.  If you attend the Special  Meeting,  you may vote in person
even though you have previously returned a proxy.

    Please  do not send in any stock  certificates  until  you  receive  further
instructions.

                                            On behalf of the Board of Directors,
                                            
                                            /s/ Walter C. Barber

                                            WALTER C. BARBER
                                            Chairman of the Board, President and
                                            Chief Executive Officer

<PAGE>

                       GROUNDWATER TECHNOLOGY, INC.
                           100 RIVER RIDGE DRIVE
                       NORWOOD, MASSACHUSETTS 02062

                                 --------

                 NOTICE OF SPECIAL MEETING OF STOCKHOLDERS
                        TO BE HELD ON MAY 10, 1996

                                 --------

To the Stockholders of 
  GROUNDWATER TECHNOLOGY, INC.:

    NOTICE IS HEREBY  GIVEN  that a Special  Meeting  of the  Stockholders  (the
"Special  Meeting") of  Groundwater  Technology,  Inc.,  a Delaware  corporation
("GTI" or the  "Company"),  will be held at the  Courtyard  Marriott,  300 River
Ridge Drive, Norwood,  Massachusetts on Friday, May 10, 1996, commencing at 9:30
a.m., local time.

    The purpose of the Special Meeting will be:

    (1) To  consider  and  vote  upon  approval  of  certain  transactions  (the
"Transactions")  contemplated  by the Investment  Agreement dated as of December
11, 1995, as amended (the "Investment Agreement") among GTI, Fluor Daniel, Inc.,
a California corporation ("Fluor"), Fluor Daniel Environmental Services, Inc., a
California  corporation and  wholly-owned  subsidiary of Fluor ("FDESI") and GTI
Acquisition  Corporation,  a newly created  California  corporation  and wholly-
owned  subsidiary  of GTI  ("Merger  Subsidiary"),  pursuant  to  which  (i) the
Restated  Certificate of Incorporation  will be amended to effect the conversion
of each outstanding  share of GTI common stock, $.01 par value ("Common Stock"),
into the right to receive $8.62 in cash and .5274 of a share of newly authorized
common stock,  $.001 par value ("New Common Stock"),  and to amend Article FIRST
thereof to change the  Company's  name to "Fluor  Daniel  GTI,  Inc.",  to amend
Article THIRD to maximize the legally permissible purposes of the Company and to
delete Article SIXTH to eliminate the classified Board of Directors; (ii) Merger
Subsidiary  will be merged with and into FDESI (the  "Merger")  with FDESI being
the  surviving  corporation;  in the Merger  GTI will  issue to Fluor  4,400,000
shares of New Common Stock in exchange for Fluor's  shares of FDESI common stock
and its payment of $33.35 million in cash;  (iii) the Company's  By-Laws will be
amended pursuant to the Investment  Agreement;  and (iv) the persons provided in
the Investment Agreement will be elected to the Board of Directors.  Approval of
the  Transactions  by GTI  stockholders  will also  constitute  approval  of the
treatment and  disposition  of outstanding  stock options and rights under,  and
certain  amendments to, GTI's existing  employee and director stock option plans
and employee stock purchase plan in connection with the Transactions.

    (2) To transact such other  business as may properly come before the Special
Meeting or any adjournments or postponements thereof.

    Detailed  information  relating to the  Transactions  and related matters is
contained  in the  accompanying  Proxy  Statement/Prospectus,  and  the  annexes
thereto, which form a part of this Notice.

    The Board of Directors  has fixed the close of business on March 20, 1996 as
the record date for determining the stockholders  entitled to receive notice of,
and to vote at, the Special Meeting or any adjournment or postponement  thereof.
A complete list of such  stockholders  will be available at GTI's  headquarters,
100 River  Ridge  Drive,  Norwood,  MA 02062,  for ten days  before the  Special
Meeting.

<PAGE>

                          YOUR VOTE IS IMPORTANT

    ALL  STOCKHOLDERS ARE CORDIALLY  INVITED TO ATTEND THE SPECIAL  MEETING.  TO
ENSURE YOUR  REPRESENTATION  AT THE SPECIAL MEETING,  HOWEVER,  YOU ARE URGED TO
COMPLETE,  DATE,  SIGN AND RETURN THE ENCLOSED PROXY AS PROMPTLY AS POSSIBLE.  A
POSTAGE-PREPAID ENVELOPE IS ENCLOSED FOR THAT PURPOSE. ANY STOCKHOLDER ATTENDING
THE SPECIAL  MEETING MAY VOTE IN PERSON EVEN IF THAT  STOCKHOLDER HAS RETURNED A
PROXY.

                                            By Order of the Board of Directors,
                                            
                                            /s/ Catherine L. Farrell

                                            CATHERINE L. FARRELL
                                            Vice President, General Counsel and 
                                            Secretary

Norwood, Massachusetts
April 5, 1996

    STOCKHOLDERS  SHOULD NOT SEND CERTIFICATES  REPRESENTING THEIR SHARES TO GTI
OR THE EXCHANGE AGENT FOR EXCHANGE IN THE  RECAPITALIZATION  PRIOR TO RECEIPT OF
INSTRUCTIONS THAT WILL BE SENT TO STOCKHOLDERS FOLLOWING THE SPECIAL MEETING.

<PAGE>

                             TABLE OF CONTENTS

<TABLE>
<CAPTION>

                                                                               PAGE

<S>                                                                              <C>
AVAILABLE INFORMATION                                                             3
INCORPORATION OF DOCUMENTS BY REFERENCE                                           3
SUMMARY                                                                           4
RISK FACTORS                                                                     11
GENERAL INFORMATION                                                              13
   Purpose of Special Meeting                                                    13
   Record Date; Voting Rights; Proxies                                           13
   Solicitation of Proxies                                                       14
   Quorum                                                                        14
   Required Vote                                                                 14
THE TRANSACTIONS                                                                 15
   GTI's Strategic Planning                                                      15
   Background to the Transactions                                                16
   GTI's Reasons for the Transactions; Recommendation of the Board of Directors  18
   Opinion of Financial Advisor                                                  19
   Fluor's and FDESI's Reasons for the Transactions                              23
   Board of Directors and Officers                                               23
   Conflicts of Interest                                                         24
   The Option Agreement                                                          26
   Certain Federal Income Tax Consequences                                       27
   Certain Legal Matters                                                         28
THE INVESTMENT AGREEMENT                                                         29
   General                                                                       29
   The Recapitalization                                                          29
   The Merger                                                                    30
   Treatment of Stock Options                                                    31
   Agreements of GTI Not to Solicit Other Offers                                 31
   Certain Restrictions on Fluor and the Company following the Closing           32
   Additional Covenants of the Parties                                           33
   Representations and Warranties                                                35
   Conditions to Consummation of the Merger                                      35
   Termination                                                                   37
   Termination Fee                                                               37
   Amendment; Waivers                                                            37
   Expenses                                                                      38
THE MARKETING AGREEMENT                                                          38
THE AMENDED AND RESTATED CERTIFICATE OF INCORPORATION                            39
AMENDMENTS TO THE BY-LAWS                                                        39
ELECTION OF DIRECTORS                                                            40
AMENDMENTS TO STOCK PLANS                                                        41
SHARE OWNERSHIP OF GTI MANAGEMENT AND PRINCIPAL HOLDERS                          42
DESCRIPTION OF NEW COMMON STOCK                                                  43
INFORMATION WITH RESPECT TO FDESI                                                44
   FDESI Business                                                                44
   Selected Financial Data                                                       47
   Management's Discussion and Analysis of Financial Condition and Results of
     Operations                                                                  47
   Market Price; Dividends; Holders of Capital Stock                             49
UNAUDITED PRO FORMA FINANCIAL INFORMATION                                        50
LEGAL MATTERS                                                                    54
EXPERTS                                                                          54
STOCKHOLDER PROPOSALS                                                            54
INDEX TO FINANCIAL STATEMENTS                                                   F-1
ANNEX A:  Investment  Agreement  by  and among Fluor Daniel, Inc., Fluor Daniel
          Environmental Services,  Inc., Groundwater  Technology,  Inc. and GTI
          Acquisition Corporation,  dated as of December  11,  1995  (including
          Exhibit  A  --  Form  of  Amended   and   Restated   Certificate   of
          Incorporation, Exhibit B -- Form of Amended By-Laws; and Exhibit C --
          Marketing  Agreement) and Agreement of Amendment  thereto dated as of
          March 29, 1996                                                        A-1
ANNEX B:  Opinion of Donaldson, Lufkin & Jenrette Securities Corporation, dated
          March 27, 1996                                                        B-1

</TABLE>

                                       i
<PAGE>

                        PROXY STATEMENT/PROSPECTUS

                       GROUNDWATER TECHNOLOGY, INC.
                           100 RIVER RIDGE DRIVE
                       NORWOOD, MASSACHUSETTS 02062

                                 --------

                       PROXY STATEMENT/PROSPECTUS OF
                       GROUNDWATER TECHNOLOGY, INC.

                  FOR THE SPECIAL MEETING OF STOCKHOLDERS
                        TO BE HELD ON MAY 10, 1996

                                 --------

    This  Proxy   Statement/Prospectus   constitutes   the  Proxy  Statement  of
Groundwater  Technology,  Inc., a Delaware corporation ("GTI" or the "Company"),
and relates to the  solicitation  of proxies  for use at the Special  Meeting of
Stockholders of GTI (the "Special Meeting")  scheduled to be held on Friday, May
10, 1996, at 9:30 a.m., local time, at the Courtyard  Marriott,  300 River Ridge
Drive, Norwood, Massachusetts, and any adjournments or postponements thereof. At
the Special Meeting,  GTI's stockholders will be asked to consider and vote upon
the approval of certain  transactions (the  "Transactions")  contemplated by the
Investment  Agreement dated as of December 11, 1995, as amended (the "Investment
Agreement") among GTI, Fluor Daniel, Inc., a California  corporation  ("Fluor"),
Fluor  Daniel  Environmental  Services,   Inc.,  a  California  corporation  and
wholly-owned  subsidiary of Fluor ("FDESI") and GTI Acquisition  Corporation,  a
newly created California corporation and wholly-owned subsidiary of GTI ("Merger
Subsidiary"), pursuant to which (i) the Restated Certificate of Incorporation of
GTI will be amended to effect the conversion  (the  "Recapitalization")  of each
outstanding  share (the  "Shares") of GTI common stock,  $.01 par value ("Common
Stock"),  into a right to  receive  $8.62 in cash and  .5274 of a share of newly
authorized  common  stock,  $.001 par value ("New Common  Stock"),  and to amend
Article FIRST to change the Company's  name to Fluor Daniel GTI,  Inc., to Amend
Article THIRD to maximize the legally permissible purposes of the Company and to
delete Article SIXTH to eliminate the classified Board of Directors; (ii) Merger
Subsidiary  will be merged with and into FDESI (the  "Merger")  with FDESI being
the surviving  corporation and  wholly-owned  subsidiary of the Company;  in the
Merger GTI will issue to Fluor 4,400,000  shares of New Common Stock in exchange
for Fluor's  shares of FDESI common  stock and its payment of $33.35  million in
cash;  (iii) the Company's  By-Laws will be amended  pursuant to the  Investment
Agreement;  and (iv) those persons provided for in the Investment Agreement will
be elected to the Board of Directors.  Approval of the  Transactions  shall also
constitute  approval of the  treatment  and  disposition  of  outstanding  stock
options and rights under, and certain amendments to, GTI's existing employee and
director stock option plans and employee stock purchase plan in connection  with
the Transactions.

    Except  for  the  $.001  par  value  per  share,  the  rights,  preferences,
privileges and restrictions of the New Common Stock are substantially  identical
to those of the Common Stock. See "DESCRIPTION OF NEW COMMON STOCK."

    This Proxy  Statement/Prospectus also constitutes the Prospectus of GTI with
respect to (i) the shares of New Common Stock to be issued on  conversion of the
Company's  outstanding shares of Common Stock pursuant to the  Recapitalization,
(ii) the  4,400,000  shares  of New  Common  Stock to be  issued to Fluor in the
Merger and (iii) the  options  for the  purchase  of shares of New Common  Stock
issued in exchange for employee and director stock options  outstanding prior to
the  Transactions.  GTI has  filed a  Registration  Statement  on Form  S-4 (the
"Registration  Statement"),  of which this Proxy  Statement is a part,  with the
Securities and Exchange  Commission (the "Commission")  under the Securities Act
of 1933, as amended (the  "Securities  Act"),  covering the shares of New Common
Stock to be issued pursuant to the Recapitalization and the Merger.

<PAGE>

    On March 27,  1996,  Donaldson,  Lufkin &  Jenrette  Securities  Corporation
("DLJ"),  financial advisor to the Company, delivered its written opinion to the
Company's  Board of  Directors  confirming  its written  opinion of December 11,
1995, to the effect that based upon and subject to the  provisions  set forth in
such  opinion,  the  consideration  to  be  received  by  the  Company  and  its
stockholders pursuant to the Transactions, as a whole, is fair, from a financial
point of view, to the Company and its stockholders.

    Consummation of the  Transactions is subject to the receipt of approval from
the  holders  of  Shares  of  GTI's  Common  Stock,  as  well as  certain  other
conditions,  all of which are more  fully  described  in this  Proxy  Statement/
Prospectus.

    This Proxy  Statement/Prospectus is first being mailed to GTI's stockholders
on or about April 5, 1996.

    The Shares are currently  traded on the Nasdaq  National  Market (the "NNM")
under the symbol  "GWTI." The last reported sale price of the Shares on April 1,
1996 was  $13.625.  No shares of New Common Stock will have been issued prior to
the  Recapitalization.  The NNM has approved  the listing,  subject to notice of
issuance,  of the  New  Common  Stock  which  is to be  issued  pursuant  to the
Recapitalization under the symbol "FDGT."

    NO  PERSON  HAS  BEEN  AUTHORIZED  TO GIVE  ANY  INFORMATION  OR TO MAKE ANY
REPRESENTATION NOT CONTAINED IN THIS PROXY  STATEMENT/PROSPECTUS,  AND, IF GIVEN
OR MADE, SUCH INFORMATION OR REPRESENTATION  SHOULD NOT BE RELIED UPON AS HAVING
BEEN AUTHORIZED. UNDER THE RULES AND REGULATIONS OF THE COMMISSION, THE PROPOSAL
TO APPROVE THE  TRANSACTIONS,  INCLUDING THE  RECAPITALIZATION,  CONSTITUTES  AN
OFFER OF NEW  COMMON  STOCK TO HOLDERS OF  SHARES.  THE  DELIVERY  OF THIS PROXY
STATEMENT/PROSPECTUS  DOES NOT CONSTITUTE AN OFFER TO SELL, OR THE  SOLICITATION
OF AN OFFER TO PURCHASE,  THE SECURITIES  OFFERED HEREBY OR A SOLICITATION  OF A
PROXY IN ANY  JURISDICTION  WHERE SUCH OFFER OR SOLICITATION  WOULD BE UNLAWFUL.
NEITHER THE DELIVERY OF THIS PROXY  STATEMENT/PROSPECTUS NOR THE ISSUANCE OF ANY
SECURITIES  HEREUNDER SHALL UNDER ANY CIRCUMSTANCES  CREATE ANY IMPLICATION THAT
THERE  HAS BEEN NO  CHANGE  IN THE  AFFAIRS  OF GTI  SINCE  THE DATE AS OF WHICH
INFORMATION IS FURNISHED OR THE DATE HEREOF.

    An  investment  in GTI's New Common  Stock  through  approval  of the Trans-
actions involves certain significant risks. See "RISK FACTORS."

      THE NEW COMMON STOCK TO BE ISSUED PURSUANT TO THE TERMS OF INVESTMENT
         AGREEMENT  AND  THE TRANSACTIONS CONTEMPLATED THEREBY HAVE NOT
          BEEN APPROVED OR  DISAPPROVED BY THE SECURITIES AND EXCHANGE
           COMMISSION NOR HAS THE COMMISSION PASSED UPON THE ACCURACY
             OR  ADEQUACY  OF THIS  PROXY STATEMENT/PROSPECTUS. ANY
              REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.

       THE DATE OF THIS PROXY STATEMENT/PROSPECTUS IS APRIL 5, 1996

                                       2
<PAGE>

                             AVAILABLE INFORMATION

    As  permitted by the rules and  regulations  of the  Commission,  this Proxy
Statement/Prospectus  omits certain  information  contained in the  Registration
Statement.  For such information reference is made to the Registration Statement
and  the  annexes  thereto.   The  Company  is  subject  to  the   informational
requirements  of the Securities  Exchange Act of 1934, as amended (the "Exchange
Act"),  and in accordance  therewith files reports,  proxy  statements and other
information with the Commission.  The Registration Statement of which this Proxy
Statement/Prospectus  forms a part,  as well as reports,  proxy  statements  and
other  information  filed by the  Company,  can be  inspected  and copied at the
Commission's  Public Reference Room,  Judiciary  Plaza, 450 Fifth Street,  N.W.,
Washington,  D.C. 20549 and at the public reference facilities maintained by the
Commission at its regional  offices  located at Seven World Trade  Center,  13th
Floor,  New York, New York 10048 and Northwest  Atrium Center,  500 West Madison
Street,  Suite 1400,  Chicago,  Illinois 60661.  Copies of such materials can be
obtained  from the  Commission  at  prescribed  rates from the Public  Reference
Section of the Commission at 450 Fifth Street, N.W., Washington, D.C. 20549. The
Shares are listed on the Nasdaq National  Market System and such reports,  proxy
statements  and  other  information  concerning  GTI  should  be  available  for
inspection at the offices of The Nasdaq National Market, Reports Section, 1735 K
Street, Washington, D.C. 20006.

    THIS PROXY STATEMENT/PROSPECTUS INCORPORATES BY REFERENCE DOCUMENTS THAT ARE
NOT PRESENTED HEREIN OR DELIVERED HEREWITH. THESE DOCUMENTS (OTHER THAN EXHIBITS
TO SUCH  DOCUMENTS,  UNLESS  SUCH  EXHIBITS  ARE  SPECIFICALLY  INCORPORATED  BY
REFERENCE  INTO THE  INFORMATION  INCORPORATED  HEREIN)  ARE  AVAILABLE  WITHOUT
CHARGE,  UPON  ORAL OR  WRITTEN  REQUEST  BY ANY  PERSON  RECEIVING  THIS  PROXY
STATEMENT/PROSPECTUS,  FROM THE CORPORATE  SECRETARY OF GROUNDWATER  TECHNOLOGY,
INC., 100 RIVER RIDGE DRIVE,  NORWOOD,  MASSACHUSETTS 02062, (617) 769-7600.  IN
ORDER TO ENSURE TIMELY DELIVERY OF THE DOCUMENTS,  ANY REQUEST SHOULD BE MADE BY
MAY 6, 1996.

                  INCORPORATION OF DOCUMENTS BY REFERENCE

    The following documents  previously filed by the Company with the Commission
pursuant to the Exchange Act are hereby  incorporated by reference in this Proxy
Statement/Prospectus:

    (a) Annual Report on Form 10-K for the year ended April 29, 1995;

    (b) Proxy Statement for the Annual Meeting of Stockholders held on
        September 19, 1995;

    (c) Current Report on Form 8-K filed on July 26, 1995;

    (d) Quarterly Report on Form 10-Q for the quarter ended July 29,
        1995;

    (e) Amendment No. 1 to Current Report on Form 8-K/A filed on August
        1, 1995;

    (f) Quarterly Report on Form 10-Q for the quarter ended October 28,
        1995; and

    (g) Quarterly Report on Form 10-Q for the quarter ended January 27,
        1996.

    All documents filed by the Company  pursuant to Section 13(a),  13(c), 14 or
15(d) of the Exchange Act subsequent to the date hereof and prior to the date of
the Special  Meeting  referred to herein shall be deemed to be  incorporated  by
reference  herein and to be a part hereof from the date of filing  thereof.  Any
statement  contained in a document  incorporated or deemed to be incorporated by
reference  herein shall be deemed to be modified or  superseded  for purposes of
this Proxy Statement/Prospectus to the extent that a statement contained herein,
or in any  other  subsequently  filed  document  that also is or is deemed to be
incorporated by reference  herein,  modifies or supersedes  such statement.  Any
such  statement  so modified  or  superseded  shall not be deemed,  except as so
modified or superseded, to constitute a part of the Proxy  Statement/Prospectus.
If the Transactions are consummated, the Company will continue to be required to
file  periodic  reports,   proxy  statements  and  other  information  with  the
Commission pursuant to the Exchange Act.

                                       3
<PAGE>

                                  SUMMARY

    The following is a brief summary of the more detailed information  contained
in this Proxy  Statement/Prospectus  with respect to the Transactions  discussed
herein.  This  Summary is not  intended to be complete  and is  qualified in its
entirety by the more  detailed  information  contained  elsewhere  in this Proxy
Statement/Prospectus, the Annexes hereto and other documents referred to in this
Proxy Statement/Prospectus.  Terms used but not defined in this Summary have the
meanings  ascribed to them elsewhere in this Proxy  Statement/Prospectus.  Cross
references  in this  Summary  are to the  captions  of  sections  of this  Proxy
Statement/Prospectus.

    Stockholders  are  urged to read  this  Proxy  Statement/Prospectus  and the
Annexes hereto in their entirety.

THE COMPANIES

    GTI and its subsidiaries provides a full range of environmental  consulting,
engineering and remediation  services to a variety of petroleum,  commercial and
industrial  customers  and federal,  state and local  government  agencies.  The
Company was incorporated in Delaware in October 1975 and currently operates from
59 consulting  offices  throughout the United States and six foreign  countries.
Also,  the  Company's  joint  venture  with a German  company has offices in six
additional  locations in Germany,  Austria and Hungary.  The principal executive
offices of the Company are located at 100 River Ridge Drive,  Norwood,  MA 02062
and its telephone number is (617) 769-7600.

    FDESI provides a full range of  environmental  consulting,  engineering  and
remediation  services to commercial  and industrial  customers,  and to federal,
state and local  government  agencies.  FDESI is a  wholly-owned  subsidiary  of
Fluor. Fluor is an indirect,  wholly-owned  subsidiary of Fluor  Corporation,  a
Delaware corporation,  which is one of the largest  publicly-owned  engineering,
construction and diversified  services firms in the United States. The shares of
Fluor  Corporation are traded on The New York Stock Exchange.  See  "INFORMATION
WITH RESPECT TO FDESI." The principal  executive offices of FDESI are located at
3333 Michelson  Drive,  Irvine,  California  92730,  and its telephone number is
(714) 975-2000.

THE MEETING

The Special  Meeting  will be held on Friday,  May 10, 1996 at 9:30 a.m.,  local
time, at the Courtyard Marriott, 300 River Ridge Drive, Norwood,  Massachusetts.
At the Special Meeting, GTI stockholders will be asked to consider and vote upon
the Transactions.  Approval of the Transactions will constitute  approval of the
Amended and Restated  Certificate of  Incorporation,  the Amended  By-Laws,  the
issuance of shares of New Common  Stock to Fluor in the Merger,  the election of
the Board of Directors  and the approval of the  treatment  and  disposition  of
outstanding  stock options and rights under,  and certain  amendments  to, GTI's
existing  employee and director  stock option plans and employee  stock purchase
plan in connection with the Transactions. See "TRANSACTIONS AMENDED AND RESTATED
CERTIFICATE  OF   INCORPORATION,"   "AMENDMENTS  TO  BY-LAWS,"  "THE  INVESTMENT
AGREEMENT -- The Recapitalization" and "-- The Merger," "ELECTION OF DIRECTORS,"
"THE  INVESTMENT  AGREEMENT -- Treatment of Stock  Options" and  "AMENDMENTS  TO
STOCK PLANS."

    If the  Transactions  are approved and the Merger and  Recapitalization  are
consummated,  each of GTI's stockholders (including stockholders who do not vote
or vote not to approve the transactions) will be entitled to receive for each of
their Shares:  (i) $8.62 in cash,  and (ii) .5274 of a share of New Common Stock
of the Company. In the Merger, the shares of common stock of FDESI held by Fluor
will be converted into the right to receive an aggregate of 4,400,000  shares of
New  Common  Stock  of the  Company,  in  exchange  for  which  Fluor  will  pay
$33,350,000  and FDESI will become a  wholly-owned  subsidiary of GTI. After the
Merger and  Recapitalization,  Fluor will own  approximately 55% and current GTI
holders will own  approximately 45% of the Company.  In addition,  Fluor and GTI
will enter into a Marketing  Agreement  encompassing  their arrangements to work
together to approach the  environmental  services  market,  for Fluor to use the
Company's  services in  connection  with Fluor's  engineering  and  construction
business and to provide,  on an  intercompany  basis,  support  services to each
other. See "THE TRANSACTIONS -- The Marketing Agreement."

    Approval of the Transactions by GTI's stockholders will constitute  approval
of: (i) the Amended and  Restated  Certificate  of  Incorporation  to effect the
conversion of the Shares into newly authorized shares of New Common Stock in the
Recapitalization,  to  change  the  Company's  name,  to  maximize  the  legally
permissible  purposes of the 

                                       4
<PAGE>

Company and to eliminate the classified Board of Directors;  (ii) the amendments
to the Company's  By-Laws;  (iii) the issuance of 4,400,000 shares of New Common
Stock to Fluor in the Merger;  (iv) the election of the Board of  Directors  and
(v) the approval of the treatment and  disposition of outstanding  stock options
and rights  under,  and certain  amendments  to,  GTI's  existing  employee  and
director stock option plans and employee stock purchase plan in connection  with
the Transactions.

    Only holders of shares of Common Stock of record at the close of business on
March 20,  1996 (the  "Record  Date")  will be  entitled  to vote at the Special
Meeting.  At such date,  there were  outstanding  and entitled to vote 6,970,701
Shares.   Stockholders   have  no   dissenters'   rights  with  respect  to  the
Transactions.

REQUIRED VOTE

    Each  holder of record of Shares on the Record  Date is entitled to one vote
per Share on each matter to be considered at the Special Meeting.

    The presence,  in person or by properly  executed proxy, of the holders of a
majority of the Shares  entitled to vote at the Special  Meeting is necessary to
constitute a quorum at the Special  Meeting.  The approval of the  Transactions,
which shall  constitute  approval of the Amended  and  Restated  Certificate  of
Incorporation,  the  issuance of New Common  Stock to Fluor in the  Merger,  the
amendments to the Company's By-Laws, the election of directors and the treatment
and  disposition  of  outstanding  stock options and rights  under,  and certain
amendments to, the Company's  existing  employee and director stock option plans
and employee  stock  purchase  plan,  will require the  affirmative  vote of the
holders  of at least a  majority  of the  outstanding  shares  of  Common  Stock
entitled to vote thereon.

    As of the Record Date,  directors  and  executive  officers of GTI and their
affiliates owned  beneficially an aggregate of 278,525 Shares  (excluding shares
which may be received upon exercise of options or warrants) or  approximately 4%
of the votes  entitled to be cast on the  proposal to approve the  Transactions.
Each of the directors and executive  officers has indicated to GTI  individually
that all Shares  owned by such person are  intended to be voted for  approval of
the Transactions.

CONFLICTS OF INTEREST

    In connection with the  Transactions,  Walter C. Barber,  current  Chairman,
President  and Chief  Executive  Officer of the Company and Allan S. Bufferd and
Robert P.  Schechter,  current  independent  directors  of the  Company  will be
reelected to the Board of Directors of the Company. Pursuant to the terms of the
Investment  Agreement,  Fluor has agreed to vote its shares of New Common  Stock
for the election of Messrs. Bufferd and Schechter until the annual meeting to be
held in 1998.

    Pursuant to certain  employment  agreements  with the Company  which  become
effective upon  consummation of the  Transactions,  Mr. Barber and the Company's
executive officers, Wendell W. Lattz, Frank J. Gorry, J. Steven Paquette, Robert
E. Sliney,  Jr., Glenn V. Batchelder,  Catherine L. Farrell and Anne Nolan, will
be entitled to certain  payments on  termination of their  employment  and, with
respect to Mr. Barber, also upon termination of his service as a director, under
certain circumstances.  In addition,  upon the consummation of the Transactions,
certain  restrictions on and forfeiture  provisions relating to 20,000 shares of
Common  Stock  awarded  by the  Board on June  27,  1995 to Mr.  Barber  will be
terminated. See "THE TRANSACTIONS -- Conflicts of Interest."

RECOMMENDATION OF THE BOARD OF DIRECTORS

    The Board of Directors of GTI has determined that the  Transactions are fair
to and in the best interests of the Company and its stockholders and unanimously
recommends approval of the Transactions to the Company's stockholders.  See "THE
TRANSACTIONS   --  Background  to  the   Transactions,"   "--  Reasons  for  the
Transactions,"  "--  Recommendation of the Board of Directors" and "-- Conflicts
of Interests."

                                       5
<PAGE>

THE INVESTMENT AGREEMENT

    Effective  Time.  The  Recapitalization   will  become  effective  upon  the
specified   effective   date  of  the  Amended  and  Restated   Certificate   of
Incorporation  filed with the  Secretary of State of the State of Delaware.  The
Merger  will  become  effective  (the  "Effective  Time")  on the day  that  the
Certificate  of Merger filed with the Secretary of State of California  pursuant
to the California Corporations Code (the "California Code") is deemed effective.
It is  currently  expected  that,  if  all  conditions  to  the  closing  of the
Transactions set forth in the Investment  Agreement have been met or waived, the
Amended and Restated Certificate of Incorporation,  and immediately  thereafter,
the  Certificate  of Merger,  will be deemed  effective  and the  closing of the
Transactions  (the  "Closing")  will  take  place  on May  10,  1996  or as soon
thereafter as practicable (the "Closing Date"). See "THE INVESTMENT AGREEMENT --
Conditions to Consummation of the Merger."

    Conditions  to  Closing.  The  obligations  of GTI to effect the  Recapital-
ization and of GTI, the Merger  Subsidiary,  Fluor and FDESI to  consummate  the
Merger are subject to certain conditions,  including, among others, the approval
of the  Transactions by the stockholders of GTI in accordance with Delaware Law,
the execution  and delivery of the Marketing  Agreement by Fluor and GTI and the
absence of any  injunction or other legal  prohibition  to  consummation  of the
Merger. See "THE INVESTMENT AGREEMENT -- Conditions to the Parties' Consummation
of the Merger."

    "No Shop"  Provisions.  Pursuant to Section 5.4 of the Investment  Agreement
(the  "'No-Shop'  Provisions"),  GTI has also agreed that from December 11, 1995
until the earlier of the Closing or the termination of the Investment Agreement,
the  Company  and its  subsidiaries  will not take  certain  actions to solicit,
negotiate or agree to proposals of third  parties  (other than Fluor) to acquire
the Company,  except where failure to do so could  constitute a violation of the
fiduciary duties of the Board to the Company and its stockholders under Delaware
Law. See "THE  INVESTMENT  TO AGREEMENT -- Agreement of GTI Not to Solicit Other
Offers."

    Termination. The Investment Agreement may be terminated at any time prior to
the  Closing   (notwithstanding   any  approval  of  the   Transactions  by  the
stockholders  of GTI): (i) by mutual written  consent of GTI and Fluor;  (ii) by
GTI or Fluor if the Closing has not occurred on or before May 31, 1996 (provided
that such failure is not caused by the  terminating  party's  failure to fulfill
its obligations  under the Investment  Agreement);  (iii) by GTI or Fluor if (a)
any  law or  regulation  adopted  or  amended  after  December  11,  1995  makes
consummation of the Merger or effectiveness of the Option Agreement or Marketing
Agreement  illegal  or  prohibited  or (b) any  final,  nonappealable  judgment,
injunction, order or decree enjoining consummation of such transactions has been
entered (provided that the terminating party has used all reasonable  efforts to
remove such  judgment,  injunction,  order or  decree);  (iv) by Fluor or by the
Company (so long as it complies with the "No-Shop"  Provisions of the Investment
Agreement)  if  the  Board  modifies  or  withdraws  its  recommendation  to GTI
stockholders to approve the  Transactions or has recommended to GTI stockholders
an  Acquisition  Proposal  (as  defined  in  Section  5.4(b)  of the  Investment
Agreement);  (v) by Fluor,  so long as it is not in  material  breach  under the
Investment  Agreement,  if a person or group other than Fluor or its  affiliates
(a) has made an  Acquisition  Proposal and GTI shall have  commenced  discussion
with such person or group or (b) has become the beneficial owner of at least 20%
of the outstanding  Shares;  (vi)(a) by GTI or Fluor if GTI  stockholders do not
approve the Transactions at the Special Meeting, or (b) by Fluor if such meeting
is not held prior to May 31, 1996; (vii) by GTI or Fluor if there is a breach by
the other party of any  representation,  warranty,  covenant or agreement of the
other party which is incurable or has not been cured by May 31, 1996.

    Termination Fee. The Investment Agreement provides that GTI will pay Fluor a
termination  fee of $3 million,  plus up to an additional  $750,000 for fees and
disbursements  actually  incurred,   upon  the  termination  of  the  Investment
Agreement under the following  circumstances:  (i) upon termination  pursuant to
the provisions  described in clause (iv) under the heading  "Termination" above;
(ii) upon  termination  pursuant to the  provisions  described in clauses (v) or
(vi)(a),  provided  that (a) an  Acquisition  Proposal is  received  prior to or
within 60 days after such termination and (b) an Acquisition  Proposal involving
a business  combination with GTI is entered into (or, in the case of a tender or
exchange  offer,   such  offer  commenced)   within  twelve  months  after  such
termination; and (iii) upon termination pursuant to a breach by GTI described in
clause (vii) above if (a) prior to or within 60 days of such termination GTI has
entered discussions or negotiations or supplied  information to, any third party

                                       6
<PAGE>

making an  Acquisition  Proposal and (b) an agreement  respecting an Acquisition
Proposal Transactions  involving a business combination with GTI shall have been
entered  into  (or,  in the case of a  tender  of  exchange  offer,  such  offer
commenced)  within twelve  months after such  termination.  See "THE  INVESTMENT
AGREEMENT -- Termination  Fee." The  termination  fee was required by Fluor as a
condition of its willingness to enter the Investment Agreement.

    The Option  Agreement.  Simultaneously  with the execution of the Investment
Agreement on December 11, 1995,  GTI and Fluor entered into an Option  Agreement
pursuant to which GTI sold to Fluor for a cash payment of  $1,650,000  an option
(the  "Option")  to  purchase  up to  1,366,000  shares of Common  Stock (or, if
exercised after the Closing under the Investment Agreement, New Common Stock) of
the Company at a per share exercise  price of $17.00 per share,  with the number
of shares and exercise price subject to adjustment  pursuant to the terms of the
Option Agreement. The Option expires on December 11, 1998. See "THE TRANSACTIONS
- -- The Option Agreement."

AMENDED AND RESTATED CERTIFICATE OF INCORPORATION

    Upon  the  effective  date  of  the  Amended  and  Restated  Certificate  of
Incorporation,  GTI's Restated  Certificate of Incorporation will be amended to,
among other things,  authorize  25,000,000 shares of New Common Stock, to effect
the  Recapitalization,  to  eliminate  the  classified  Board and to change  the
Company's  name to "Fluor  Daniel GTI,  Inc." Shares of New Common Stock will be
substantially  identical  to the Shares,  except that shares of New Common Stock
will  have a par  value of $.001.  See  "AMENDED  AND  RESTATED  CERTIFICATE  OF
INCORPORATION"  and "DESCRIPTION OF NEW COMMON STOCK." The Board of Directors of
GTI has not assigned a specific  value to the New Common Stock to be received by
stockholders in the Recapitalization.

AMENDMENTS TO BY-LAWS

    In connection  with the  Transactions,  the By-Laws of the Company are to be
amended  with  respect to various  matters,  including  amendments  to Article 2
(Meetings of  Stockholders),  Article 3 (Directors),  Article 4 (Meetings of the
Board of Directors), Article 7 (Officers), Article 8 (Resignations, Removals and
Vacancies) and Article 15 (Amendments). See "AMENDMENTS TO BY-LAWS."

ELECTION OF DIRECTORS

    The  Investment  Agreement  provides for the election of seven  directors to
serve on the  Company's  Board of Directors  immediately  following the Closing,
including  GTI's current  President and Chief  Executive  Officer,  two of GTI's
current  independent  directors,  three members of Fluor  management and a third
independent  director  designated  by  Fluor.  Until  April 30,  1999,  Fluor is
obligated  to vote its shares of New Common  Stock for the  election of not more
than seven directors and in favor of not less than three independent  directors.
In addition,  until April 30, 1998, Fluor is obligated to vote its shares of New
Common  Stock  for  the  election  of  the  two  current  independent  directors
referenced above. See "ELECTION OF DIRECTORS," and "THE INVESTMENT  AGREEMENT --
Certain Restrictions on Fluor and the Company following the Closing."

TREATMENT OF STOCK OPTIONS; AMENDMENTS TO STOCK PLANS

    Pursuant  to the  terms of the  Investment  Agreement,  promptly  after  the
Closing Date each stock option or other right  outstanding  under the  Company's
1987 Stock Plan and 1995  Director Plan on the Closing Date will be canceled and
the holder thereof will receive,  in exchange therefor,  a substitute option (an
"Adjusted  Option") to purchase a number of shares of New Common  Stock equal to
the number of shares of Common Stock subject to such canceled option  multiplied
by the Adjustment  Fraction at a per share exercise price equal to the per share
exercise price of such canceled option divided by the Adjustment  Fraction.  Any
Adjusted  Option  will be subject to the same terms and  conditions  (other than
number of shares and  exercise  price) as the option for which it is  exchanged,
including the terms relating to vesting  (treating  such Adjusted  Options as if
they were granted at the same time as the options for which they were exchanged)
and the  conditions  relating  to  exercise.  In order to  implement  the  above
disposition of options,  certain amendments will be required to GTI's 1987 Stock
Plan and 1995 Director Plan. The 1995 Director Plan will also be amended so that
employees of the  Company's  affiliates  (which,  following  the Closing,  would
include Fluor) will not be eligible to receive options under that plan. The 1986
Purchase Plan will be amended so that no adjustments to outstanding options will
be made in the  Recapitalization.  See "THE INVESTMENT AGREEMENT -- Treatment of
Stock Options" and "AMENDMENTS TO STOCK PLANS."

                                       7
<PAGE>

OPINION OF FINANCIAL ADVISOR

    Donaldson,  Lufkin & Jenrette  Securities  Corporation  ("DLJ") has acted as
financial   advisor  to  GTI  in  connection  with  its   consideration  of  the
Transactions.  DLJ has  provided to the  Company's  Board of Directors a written
opinion,  dated March 27, 1996,  confirming  an earlier  written  opinion  dated
December 11, 1995, to the effect that,  as of the date  thereof,  based upon and
subject to the provisions  set forth in such opinion,  the  consideration  to be
received by the Company and its stockholders pursuant to the Transactions,  as a
whole,  is  fair  from a  financial  point  of  view  to  the  Company  and  its
stockholders. THE FULL TEXT OF THE MARCH 27, 1996 OPINION OF DLJ IS SET FORTH IN
ANNEX B TO THIS PROXY  STATEMENT/PROSPECTUS  AND SHOULD BE READ IN ITS ENTIRETY.
See "THE TRANSACTIONS -- Opinion of Financial Advisors."

MARKET PRICES

    The Shares  have been  listed and traded on the NNM under the symbol  "GWTI"
since July 24, 1986.  The following  table sets forth certain  information as to
the reported  high and low bid  quotations  as reported on the NNM of the Common
Stock for the calendar quarters set forth.

<TABLE>
<CAPTION>

                                                   1996               1995              1994
                                                   ----               ----              ----
                                              HIGH      LOW      HIGH      LOW     HIGH      LOW
                                              ----      ---      ----      ---     ----      ---
<S>                                         <C>       <C>       <C>      <C>      <C>      <C>
First Quarter                               $ 13.25   $11.625   $15.00   $11.50   $16.25   $12.38
Second Quarter                               13.625     11.75    13.25    11.50    13.75    11.00
Third Quarter                                 19.25     12.25    15.25    11.75    15.00    11.00
Fourth Quarter                                  N/A       N/A    15.50    12.00    15.75    12.75
</TABLE>

    On November  30, 1995,  the last full trading day prior to the  announcement
that GTI and Fluor were engaged in discussions  regarding an investment by Fluor
in exchange for a majority  interest in the Company,  the closing sale price per
share of Common Stock, as reported on the NNM was $14. On December 11, 1995, the
last  full  trading  day  prior  to the  announcement  of the  execution  of the
Investment  Agreement,  the  closing  sale price per share of Common  Stock,  as
reported on the NNM was $14.75.  On April 1, 1996, the last full trading day for
which   quotations   were   available  at  the  time  of  printing   this  Proxy
Statement/Prospectus,  the  closing  sale  price per  share of  Common  Stock as
reported on the NNM was $13.625.

    STOCKHOLDERS ARE URGED TO OBTAIN CURRENT QUOTATIONS FOR THE SHARES.

    As of the Record Date, there were 1,092 holders of record of Shares.

CERTAIN FEDERAL INCOME TAX CONSEQUENCES

    In general, GTI stockholders exchanging shares of Common Stock for shares of
New Common Stock in the  Recapitalization  will recognize  capital gain equal to
the lesser of (i) the excess, if any, of the sum of the fair market value of the
New Common Stock plus the cash received over the tax basis of such stockholder's
Common  Stock  and (ii)  the  cash  received.  Stockholders  generally  will not
recognize  any  loss on the  exchange.  The tax  basis of the New  Common  Stock
received in the  Recapitalization  generally will be the stockholder's  basis in
the Common Stock  decreased by the cash  received and increased by the amount of
gain  recognized.  Stockholders  will recognize gain or loss on cash payments in
lieu of a fractional share of New Common Stock equal to the difference,  if any,
between such stockholder's adjusted basis in the fractional share and the amount
of cash received for that  fractional  share.  See "THE  TRANSACTIONS -- Certain
Federal Income Tax Consequences."

                                       8
<PAGE>

SELECTED HISTORICAL FINANCIAL DATA

    The following table sets forth  historical  consolidated  financial data for
GTI for each of its last five fiscal  years as well as for the nine months ended
January 27, 1996 and January 28,  1995.  The  selected  historical  consolidated
financial  data for GTI for the five year period  shown  below has been  derived
from the audited  consolidated  financial  statements  of GTI. The five year and
nine month periods reflect  restatements due to discontinued  manufacturing  and
laboratory  operations.  In the opinion of management,  adjustments necessary to
present  fairly the financial  position and results of operations at January 27,
1996  and  January  28,  1995  have  been  made.  The  historical  data  are not
necessarily  indicative  of results to be  expected  after  consummation  of the
Merger  and  should  be read in  conjunction  with  the  consolidated  financial
statements and notes thereto of GTI incorporated herein by reference.

              SELECTED HISTORICAL CONSOLIDATED FINANCIAL DATA
                 (IN THOUSANDS, EXCEPT PER SHARE AMOUNTS)

<TABLE>
<CAPTION>

                                                       FISCAL YEAR ENDED                          NINE MONTHS ENDED
                                                       -----------------                          -----------------
                                    APRIL 27,    MAY 2,     MAY 1,    APRIL 30,   APRIL 29,   JANUARY 28,    JANUARY 27,
                                      1991        1992       1993        1994        1995         1995          1996
                                      ----        ----       ----        ----        ----         ----          ----
<S>                                 <C>         <C>        <C>         <C>         <C>          <C>           <C>
Gross revenue                       $147,369    $179,473   $161,120    $157,749    $178,280     $133,036      $128,881
Net revenue                           98,644     123,258    108,145      98,349     109,197       52,963        79,604
Net income                             6,998      10,428      6,689       2,607       5,437        3,597         2,360
Earnings per share                      0.88        1.31       0.86        0.35        0.77         0.51          0.34
Total assets                         108,301     124,205    121,108     112,926     120,745      115,134       119,634
Stockholders' equity                $ 89,549    $100,976   $101,098    $ 93,650    $ 96,770     $ 95,626      $ 99,732
Shares used to compute earnings per
  common share                         7,980       7,931      7,779       7,458       7,050        7,085         7,042
</TABLE>

- --------

1 Gross  revenue,  net revenue,  net income and  earnings per share  amounts for
  fiscal  1991,  1992  and 1993  have  been  restated  to  exclude  discontinued
  manufacturing operations.

2 Gross revenue,  net revenue, net income and earnings per share amounts for all
  periods  presented  have been  restated  to  exclude  discontinued  laboratory
  operations.

3 Fiscal 1994 amounts include a first quarter  restructuring  and  consolidation
  charge of approximately $5,000,000 before the provision for taxes.

4 In August 1993, the Board of Directors authorized the Company to repurchase an
  aggregate of 2,173,500  shares of its common stock  periodically  through open
  market purchases or privately negotiated transactions.

SUMMARY UNAUDITED PRO FORMA FINANCIAL INFORMATION

    The  following  table  presents  summary  unaudited  pro forma  consolidated
financial  information  of the  Company  ("Fluor  Daniel  GTI,  Inc."  after the
Transactions)  for the year  ended  April  29,  1995 and the nine  months  ended
January 27, 1996, giving pro forma effect to the (i) conversion of each share of
Common  Stock  outstanding  at each period end into $8.62 in cash and .5274 of a
share of New Common Stock, (ii) the issuance and sale of 4,400,000 shares of New
Common Stock to Fluor in exchange for all outstanding shares of FDESI and $33.35
million in cash,  (iii) the  issuance  and sale of the Option to Fluor for $1.65
million,  (iv) certain costs incurred in connection with the  Transactions,  (v)
amortization of goodwill and (vi) discontinued laboratory operations. The Merger
has been accounted for as a reverse  acquisition of GTI by FDESI. For additional
assumptions reflected in the following table, see "UNAUDITED PRO FORMA FINANCIAL
INFORMATION."

                                       9
<PAGE>

    The summary unaudited pro forma consolidated  financial information does not
purport  to  represent  what the  Company's  financial  position  or  results of
operations  actually  would  have  been had the  transactions  described  in the
preceding  paragraph in fact  occurred on such date, or to project the Company's
financial position or results of operations for any future date or period.

    The summary unaudited pro forma consolidated financial information should be
read in conjunction  with the 1995  financial  statements of FDESI and the notes
thereto included in this Proxy  Statement/Prospectus  and the 1995  consolidated
financial statements of GTI and the notes thereto incorporated by reference into
this Proxy  Statement/Prospectus.  See "INCORPORATION OF DOCUMENTS BY REFERENCE"
and "UNAUDITED PRO FORMA FINANCIAL INFORMATION."

                        SUMMARY UNAUDITED PRO FORMA
                   CONSOLIDATED FINANCIAL INFORMATION OF
                          FLUOR DANIEL GTI, INC.
                 (IN THOUSANDS, EXCEPT PER SHARE AMOUNTS)

<TABLE>
<CAPTION>

                                                                                    YEAR ENDED APRIL 29, 1995
                                                                                    -------------------------
                                                                                  GTI       FDESI     PRO FORMA
                                                                                ACTUAL     ACTUAL    CONSOLIDATED
                                                                                ------     ------    ------------
<S>                                                                            <C>         <C>       <C>
INCOME STATEMENT DATA:
   Total revenues                                                              $178,280    $35,425     $213,705
   Net income                                                                  $  5,437    $   656     $  5,002
   Earnings per share                                                          $   0.77     --         $   0.62
</TABLE>

<TABLE>
<CAPTION>

                                                                               NINE MONTHS ENDED JANUARY 27, 1996
                                                                               ----------------------------------
                                                                                  GTI       FDESI      PRO FORMA
                                                                                 ACTUAL     ACTUAL   CONSOLIDATED
                                                                                 ------     ------   ------------
<S>                                                                             <C>        <C>       <C>
INCOME STATEMENT DATA:
   Total revenues                                                               $128,881   $26,319     $155,200
   Net income                                                                   $  2,360   $   489     $  2,102
   Earnings per share                                                           $   0.34     --        $   0.26
BALANCE SHEET DATA:
   Total assets                                                                 $119,634   $ 5,453     $104,072
   Stockholders' equity                                                         $ 99,732   $ 4,559     $ 81,276
OTHER DATA:
   Book value per share                                                         $  14.32     --        $  10.07
</TABLE>

DILUTION OF VOTING POWER

    The following table sets forth the percentage of outstanding voting power of
nonaffiliated  stockholders  of the Company and affiliated  stockholders  of the
Company  (a) on an  actual  basis as of March  20,  1996 and (b) on a pro  forma
basis, giving effect to the Recapitalization and the issuance to Fluor of shares
of New Common Stock in the Merger,  as if the Transactions had occurred on March
20,  1996.  For  purposes  of the table  "affiliated  stockholders"  include all
directors  and  executive  officers of the  Company  and, in the case of the pro
forma calculation, Fluor.

<TABLE>
<CAPTION>

                                                                          PERCENTAGE OF
                                                                           OUTSTANDING    PERCENTAGE OF
                                                                           VOTING POWER     PRO FORMA
                                                                              BEFORE       OUTSTANDING
                                                                           TRANSACTIONS    VOTING POWER
                                                                           ------------    ------------
<S>                                                                            <C>             <C>
Nonaffiliated Stockholders                                                     96.0%           43.7%
Affiliated Stockholders                                                         4.0%           56.3%
</TABLE>

                                       10
<PAGE>

                                  RISK FACTORS

    The  following  risk  factors  should  be  considered  by   stockholders  in
considering   whether  to  approve  the  Transactions.   For  periods  following
consummation  of  the  Transactions,  references  to  the  "Company"  should  be
considered to refer to GTI and its  subsidiaries,  including  FDESI,  unless the
context  otherwise  requires.  These factors should be considered in combination
with the other information  included and incorporated by reference in this Proxy
Statement/Prospectus.

    UNCERTAINTY  OF GOVERNMENT  MARKET FOR  ENVIRONMENTAL  SERVICES.  One of the
bases for the  Company's  affiliation  with Fluor is the potential for growth of
the  Company  through  further  penetration  into the market  for  environmental
services,  particularly  services for the federal  government.  The Company will
seek to achieve further  penetration into government  market in substantial part
through  the Merger  with FDESI  whose  primary  federal  clients are the United
States  Department  of Defense and the United  States  Environmental  Protection
Agency. The size of the government market and the extent of that market's demand
for  environmental  services is subject to change based on, among other factors,
legislative  and regulatory  developments  and budget and spending  decisions of
governmental bodies. There can be no assurance that the demand for environmental
services in the  government  market  will  achieve or remain at levels that will
permit the Company to grow by penetration of such market,  through the Merger or
otherwise,  and any reduction in the size of the government market could have an
adverse effect on the Company's  financial  condition and operating  results and
the market price of the Company's stock.

    DIFFICULTY OF IMPLEMENTING MARKETING STRATEGY. Growth of the Company through
further penetration of the environmental services market,  particularly services
for the federal  government,  is dependent upon the Company's ability to realize
the  benefits  of the  relationship  with Fluor  contemplated  by the  Marketing
Agreement and the  integration  of FDESI with GTI.  Substantial  attention and a
high level of coordination from management of both the Company and Fluor will be
required to realize the anticipated  benefits of the relationship.  Further, the
attention and resources devoted by Fluor to the  implementation  and realization
of the potential  benefits of the relationship are not within the control of the
Company,  and there can be no  assurance  that  Fluor  will  either  devote  the
necessary  attention  and  resources to  successfully  implement  the  Marketing
Agreement or that it will perform its obligations under the Marketing Agreement.
The diversion of the attention of the Company's management from other aspects of
the Company's business,  and any difficulties  encountered in the implementation
process,  could have an adverse impact on the revenues and operating  results of
the Company.  There can be no  assurance  that the  anticipated  benefits of the
relationship  will be realized,  or that the results of operations and financial
condition of the Company after becoming  affiliated  with Fluor will be superior
to what would have been achieved by GTI were the Transactions not consummated.

    DETERRENCE OF POTENTIAL  CUSTOMERS.  The Company  anticipates that its close
affiliation  with Fluor could deter other  large  engineering  and  construction
firms that compete with Fluor from retaining the Company as a  subcontractor  or
teaming partner for projects requiring environmental  services.  There can be no
assurance that the results of operations and financial  condition of the Company
after  becoming  affiliated  with Fluor will be  superior to what GTI would have
achieved  absent  such   affiliation  and  its  deterrent  effect  on  potential
customers.

    DEPENDENCE ON KEY PERSONNEL. The Company's success after the Transactions is
dependent on its ability to attract and retain qualified scientific, management,
marketing and other personnel,  for which competition is intense. It is possible
that the changes  brought about by the  Transactions  may cause key employees of
the Company and FDESI to leave the Company's employ, which could have an adverse
effect on the Company's business.  In particular,  the Company believes that the
loss of the  services of one or more members of senior  management  could have a
material adverse effect on the Company's business and future  operations.  There
can be no assurance  that the Company will be able to retain its current  senior
management or other  personnel or attract and retain other  qualified  personnel
necessary for operation and growth of its business.

    REDUCTION IN CAPITAL  RESOURCES.  Of the  approximately  $60 million in cash
payments to be made to the Company's  stockholders,  the Company will contribute
approximately $27.5 in cash (with the remaining amount to come from Fluor). As a
result, the Company's available capital resources will be 

                                       11
<PAGE>

significantly  reduced  and the  Company  may be  required  to  seek  additional
financing  to  fund  its  business  operations,  capital  expenditures  and  any
expansion of its business. The Company may seek to raise such additional capital
through short- or long-term debt financing or equity financing.  There can be no
assurance that additional  capital will be available on terms  acceptable to the
Company and any such financings may result in dilution to existing  stockholders
of the Company.

    CONTROL BY FLUOR; POSSIBLE  ANTI-TAKEOVER  EFFECTS. Upon consummation of the
Transactions,  Fluor will own  approximately  55% of the  outstanding New Common
Stock of the Company.  As a result,  Fluor will hold the voting power to approve
all matters requiring  stockholder  approval and, upon the termination or waiver
of certain  provisions  respecting  the  voting of Fluor's  shares of New Common
Stock  on April  30,  1999,  Fluor  will be able to elect  the  entire  Board of
Directors of the Company.  Consequently,  Fluor will have significant  influence
over the affairs of the Company,  including major corporate transactions such as
change of  control  transactions.  The  effects of Fluor's  voting  power  could
include the delay or prevention of the offer,  negotiation or  consummation of a
change  of  control  transaction  in  which  consideration  would be paid to the
Company's other stockholders. See "DILUTION OF VOTING POWER."

    REDUCTION IN PUBLIC FLOAT.  As a result of the  Transactions,  the number of
shares of publicly traded stock of the Company owned by  non-affiliates  will be
substantially  reduced.  There can be no assurance that, given such reduction, a
trading  market for the New Common  Stock as active as that for the Common Stock
will develop or be  sustained,  or that the market price of the New Common Stock
will not  decline  below  the  market  price of the  Common  Stock  prior to the
Transactions.

    DILUTION.  The issuance of shares of New Common  Stock to Fluor  pursuant to
the  Merger  will have the effect of  reducing  the  Company's  income per share
unless and until  revenue  growth and other  business  synergies  sufficient  to
offset the effect of such  issuance can be  achieved.  There can be no assurance
that any such revenue  growth or other business  synergies  will be achieved.  A
reduction  in the  Company's  income per share could  result in a decline in the
market price of the New Common Stock.

                                       12
<PAGE>

                              GENERAL INFORMATION

    This Proxy  Statement/Prospectus  is  furnished  to  stockholders  of GTI in
connection  with the  solicitation  of  proxies by and on behalf of the Board of
Directors of GTI for use at the Special  Meeting to be held at 9:30 a.m.,  local
time, on Friday, May 10, 1996 at the Courtyard Marriott,  300 River Ridge Drive,
Norwood, Massachusetts,  and any adjournment or postponement thereof. This Proxy
Statement/Prospectus  and the related  form of Proxy are first  being  mailed to
stockholders of GTI on or about April 5, 1996.

PURPOSE OF SPECIAL MEETING

    At the Special  Meeting,  the  stockholders of GTI will be asked to consider
and vote upon the Transactions. Approval of the Transactions will constitute (i)
approval of the Amended and Restated Certificate of Incorporation, (ii) approval
of the  issuance  of shares of New Common  Stock to Fluor in the  Merger,  (iii)
approval of  amendments  to the  By-Laws,  (iv)  election of the nominees to the
Board of Directors and (v) approval of the treatment  and  disposition  of stock
options under, and certain  amendments to, GTI's existing  employee and director
stock option plans and employee  stock purchase  plan. If the  Transactions  are
approved and consummated, the size of GTI's Board of Directors will be increased
from  four to  seven  members,  including  GTI's  current  President  and  Chief
Executive Officer, two of GTI's current independent directors,  three members of
Fluor management and a third independent director designated by Fluor.

    Pursuant to the Investment Agreement, each issued and outstanding Share will
be converted into the right to receive $8.62 in cash and .5274 of a share of New
Common Stock, and immediately thereafter,  Merger Subsidiary will be merged with
and into FDESI, with FDESI being the surviving corporation. In the Merger, Fluor
will make a cash payment of $33.35 million,  the shares of common stock of FDESI
held by Fluor  will be  converted  into the right to  receive  an  aggregate  of
4,400,000  shares  of  New  Common  Stock  of  GTI  such  that  Fluor  will  own
approximately 55% of the equity of the Company outstanding following the Merger,
and  FDESI  will  become a  wholly-owned  subsidiary  of the  Company.  See "THE
INVESTMENT  AGREEMENT -- The  Recapitalization"  and "-- The Merger." Subject to
the  fulfillment  or  waiver  of the  conditions  set  forth  in the  Investment
Agreement,  the Merger and  Recapitalization are expected to become effective as
soon as  practicable  following  approval of the  Transactions  by the Company's
stockholders.

    The Special  Meeting will also be held for the purpose of  transacting  such
other business, if any, as may properly come before the Special Meeting.

RECORD DATE; VOTING RIGHTS; PROXIES

    The Board of  Directors  of GTI has fixed the close of business on March 20,
1996 as the Record Date for determining  holders of outstanding  Shares entitled
to notice  of and to vote at the  Special  Meeting.  Only  holders  of Shares of
record on the books of the  Company at the close of  business on the Record Date
will  be  entitled  to  notice  of and to  vote at the  Special  Meeting  or any
adjournments  or  postponements  thereof.  As of  the  Record  Date  there  were
6,970,701  Shares  issued and  outstanding,  each of which  entitles  the holder
thereof to one vote. All shares of Common Stock entitled to vote and represented
by properly  executed  proxies  will,  unless such proxies have been  previously
revoked,  be voted. If instructions are indicated on any such proxy, such shares
shall be voted in accordance with the instructions indicated in such proxies. IF
NO INSTRUCTIONS ARE INDICATED, SUCH SHARES WILL BE VOTED (1) FOR APPROVAL OF THE
TRANSACTIONS,  WHICH SHALL  CONSTITUTE  APPROVAL  OF THE  AMENDED  AND  RESTATED
CERTIFICATE OF  INCORPORATION,  THE ISSUANCE OF NEW COMMON STOCK TO FLUOR IN THE
MERGER, THE AMENDED BY-LAWS,  THE ELECTION OF THE BOARD AND OF THE TREATMENT AND
DISPOSITION OF STOCK OPTIONS  OUTSTANDING  UNDER,  AND AMENDMENTS TO, THE COMPA-
NY'S  EXISTING  EMPLOYEE  AND DIRECTOR  STOCK  OPTION  PLANS AND EMPLOYEE  STOCK
PURCHASE PLAN IN CONNECTION WITH THE  TRANSACTIONS  AND (2) IN THE DISCRETION OF
THE PROXY  HOLDER AS TO ANY OTHER  MATTER  WHICH MAY  PROPERLY  COME  BEFORE THE
SPECIAL  MEETING.  GTI does not know of any matters,  other than as described in
the Notice of Special Meeting,  that are to come before the Special Meeting.  If
any other  matter or matters are  properly  presented  for action at the Special
Meeting,  the persons named in the enclosed form of proxy and acting  thereunder
will have the  discretion to vote 

                                       13
<PAGE>

on  such  matters  in  accordance   with  their  best   judgment,   unless  such
authorization is withheld.  A stockholder who has given a proxy may revoke it at
any time prior to its exercise by giving written notice thereof to the Secretary
of the Company,  by signing and  returning a later dated proxy,  or by voting in
person at the Special Meeting;  however,  mere attendance at the Special Meeting
will not itself  have the effect of  revoking  the  proxy.  Under the  Company's
Restated  Certificate of Incorporation and By-laws,  abstentions and "non-votes"
will have the same effect as a vote  "against"  the  Transactions.  A "non-vote"
will occur in the event that a nominee does not have discretionary  voting power
and has not received voting  instructions from the beneficial owner with respect
to the proposal to approve the Transactions.

SOLICITATION OF PROXIES

    GTI will bear the cost of  solicitation of proxies on behalf of the Board of
Directors.  In addition to soliciting proxies by mail,  directors,  officers and
employees  of GTI,  without  receiving  additional  compensation  therefor,  may
solicit proxies by telephone,  by telegram or in person.  Arrangements will also
be made with brokerage firms and other custodians,  nominees and fiduciaries for
the forwarding of solicitation materials to the beneficial owners of Shares held
of record by such persons,  and the Company will reimburse such brokerage firms,
custodians,  nominees and  fiduciaries  for  reasonable  out-of-pocket  expenses
incurred by them in connection therewith. The Company has retained Morrow & Co.,
Inc., a proxy  solicitation  firm, to assist in the  solicitation  of proxies in
connection  with  the  Special  Meeting  for  a fee  estimated  at  $5,000  plus
reimbursement of specified out-of-pocket expenses.

QUORUM

    The  presence  in person  or by  properly  executed  proxy of  holders  of a
majority of the  outstanding  Shares  entitled to vote at the Special Meeting is
necessary to constitute a quorum at the Special Meeting.

REQUIRED VOTE

    The approval of the  Transactions,  which shall  constitute  approval of the
Amended and Restated  Certificate of  Incorporation,  the issuance of New Common
Stock to Fluor in the  Merger,  the  amendments  to the  Company's  ByLaws,  the
election of directors and the treatment and  disposition of outstanding  options
and rights  under,  and  amendments  to, the  Company's  existing  employee  and
director stock option plans and employee  stock purchase plan,  will require the
affirmative vote of the holders of at least a majority of the outstanding Shares
entitled to vote thereon.  With respect to the Transactions,  each Share will be
entitled to one vote.

    As of the Record Date, 278,525 Shares (representing  approximately 4% of the
outstanding  Shares) were beneficially owned by directors and executive officers
of the  Company  (excluding  options  and  warrants  to  purchase  Shares in the
future).  Each of the  directors  and  executive  officers has  indicated to the
Company  individually  that all Shares  owned by such persons are intended to be
voted for approval of the Transactions.

    THE MATTERS TO BE CONSIDERED AT THE SPECIAL MEETING ARE OF GREAT  IMPORTANCE
TO THE  STOCKHOLDERS  OF GTI.  ACCORDINGLY,  STOCKHOLDERS  ARE URGED TO READ AND
CAREFULLY CONSIDER THE INFORMATION PRESENTED IN THIS PROXY STATEMENT/PROSPECTUS,
AND TO  COMPLETE,  DATE,  SIGN AND  PROMPTLY  RETURN THE  ENCLOSED  PROXY IN THE
ENCLOSED POSTAGE PAID ENVELOPE.

                                       14
<PAGE>

                                THE TRANSACTIONS

    In July 1995 Walter C. Barber,  GTI's Chairman and Chief Executive  Officer,
was approached by David L. Myers,  President of Fluor's  Environmental  Services
Operating Company ("Fluor ESOC"),  regarding a possible relationship between the
companies to jointly approach the environmental  services market. Mr. Barber and
Mr. Myers, along with David Backus,  Vice President -- Commercial of Fluor ESOC,
and John A. Rasile,  Vice President -- Strategic Programs of Fluor ESOC, had met
in June 1995 to review GTI's and Fluor's joint  proposals for specific work with
the government, and discussed each company's plans in the environmental services
marketplace.  GTI had an interest in the  possibility  of working with a company
such as Fluor on a broader  basis  because the Company had  previously  made the
strategic  decision to  diversify  more  aggressively  into the  government  and
industrial  markets,  and viewed a  relationship  with a large  engineering  and
construction firm as beneficial for that strategy.  The companies entered into a
Confidentiality  Agreement,  and  Fluor was  provided  with  certain  non-public
information. As described more fully below, the companies engaged in a series of
discussions  and  negotiations  that resulted in the Investment  Agreement being
approved by the Board of Directors on December 11, 1995.

GTI'S STRATEGIC PLANNING

    In the late 1980s and through 1991, GTI  experienced  growing demand for its
environmental  assessment and remediation  services.  The Company opened offices
across the United States and in several  foreign  countries to serve  customers.
During that period of growth,  the Company was largely dependent on customers in
the retail petroleum  industry,  which was required to take measures to test and
replace  underground  storage  tanks  and to  remediate  sites  where  leaks had
occurred.  In  1990,  the  Company  made  the  decision  to  diversify  into the
government market in anticipation of the growing demand for remediation services
by the public  sector.  In response  to  subsequent  fundamental  changes in the
environmental remediation marketplace, particularly the substantial reduction in
demand for  services by retail  petroleum  customers,  the  Company  conducted a
review of its strategy in 1992.

    As a result of its strategic planning,  the Company decided to continue with
its core  business  of  providing  environmental  services  related  to soil and
groundwater remediation, but to further diversify into government and industrial
markets so that its customer base would roughly  equate with the  proportions of
the total market for soil and groundwater  remediation  services being purchased
by those  customers.  The  Company  further  decided  to divest  several  of its
non-core  businesses,  namely drilling services and equipment sales and rentals.
The  Company  also  determined  to pursue  teaming  opportunities  for  specific
projects to strengthen its position in the government and international markets.

    Between  1992 and  1995,  GTI made  significant  progress  implementing  its
strategic  plan.  The  Company  sold  its  drilling   operations  and  equipment
manufacturing  business,  and, after discussing a number of alternative  teaming
arrangements,  the Company  sold its other  non-core  business,  the  analytical
laboratories,  in December  1995.  During  this  period the  Company  focused on
significantly  shifting  its  business  toward  the  government  and  industrial
markets,  which it accomplished through a combination of internal growth and two
acquisitions.  The Company also  continued to pursue  teaming  arrangements  for
specific projects in the government and international businesses.

    By 1995 two other changes in the market had become apparent to the Company's
management.  The  government  market  had begun to  indicate  a  preference  for
awarding  substantial  work to single  source  providers  rather  than the prime
contractor/subcontractor  relationships  which prevailed  between 1990 and 1994.
Although  the  Company's  efforts  to serve  as a  subcontractor  to the  larger
engineering  and  construction  firms had been  successful  during  the  earlier
period, the Company believed that to participate substantially in the government
and industrial markets in the future, it would require substantial  increases in
program  management  capabilities.  In  addition,  customers  in the  industrial
markets were moving from the assessment  phase of their  environmental  projects
into the remediation  phase. In this next phase of the  environmental  projects,
substantial  resources in engineering  and  construction  capabilities  would be
required.  Given these changes, GTI decided to explore potential joint marketing
and other  similar  relationships  on a  project-by-project  basis to access the
program management and engineering and construction capabilities of other 

                                       15
<PAGE>

firms,  which are needed to  support  growth in  business  with  government  and
industrial  customers.  The proposed  investment by and marketing agreement with
Fluor, the Company believes,  provides an excellent  opportunity to aggressively
pursue  the  government  and  industrial  markets,  and  to  better  access  the
international markets, as well.

BACKGROUND TO THE TRANSACTIONS

    Mr. Barber and Mr. Myers,  along with Mr. Backus and Mr. Rasile, met in June
1995 to review GTI's and Fluor's  joint  proposals  for  specific  work with the
government,  and discussed each company's  plans in the  environmental  services
marketplace.  In July 1995 Mr. Myers contacted Mr. Barber regarding the benefits
of the companies working together to approach the environmental services market.
GTI provided Fluor with certain limited  non-public  information,  and in August
Mr. Barber, Mr. Myers and Mr. Rasile met again, at which time Fluor expressed an
interest in possibly acquiring a significant equity position in the Company, but
did not provide a proposal.

    In September 1995 Fluor  requested a meeting with GTI to present a proposal.
The Company engaged Donaldson,  Lufkin & Jenrette Securities Corporation ("DLJ")
to act as its financial  advisor in connection with a possible  transaction with
Fluor. At the meeting Fluor proposed acquiring a majority equity interest in GTI
in exchange for cash and the outstanding  shares of FDESI, in a transaction that
would include a distribution of GTI's existing cash to its  stockholders.  Fluor
also proposed to purchase an option for 1,366,000 shares of the Company's Common
Stock. Mr. Myers, Mr. Rasile,  Victor L. Prechtl,  Vice President and Controller
of Fluor,  and Raymond M. Bukaty,  Senior Counsel of Fluor, and a representative
of Fluor's  financial  advisor  presented the proposal to Mr. Barber,  Robert E.
Sliney,  Jr., Vice President and Chief Financial  Officer,  Glenn V. Batchelder,
Vice President of Sales and Marketing,  Allan S. Bufferd, Director of GTI, and a
representative of DLJ. After the Fluor presentation,  GTI conferred with DLJ and
determined that the financial  aspects of the initial  proposal were inadequate.
After DLJ and Fluor's financial  advisor further  discussed the proposal,  Fluor
revised its  proposal  to GTI,  which  formed the basis for further  discussions
between the companies.

    Between October 26 and November 10, 1995, management of GTI and Fluor held a
series of  intensive  meetings to develop and  validate a business  plan for the
joint pursuit of environmental services business primarily with customers in the
government and industrial markets.  Senior managers involved in various meetings
on behalf of GTI were Mr. Barber; Mr. Sliney;  Mr.  Batchelder;  Frank J. Gorry,
Vice  President  and General  Manager of the National  Industrial  Division;  J.
Steven  Paquette,  Vice  President,  and  President  of  Groundwater  Technology
Government  Services,  Inc., a subsidiary of the Company;  and Richard A. Brown,
Vice  President of Remediation  Technology.  Senior  managers  involved in these
meeting on behalf of Fluor's  Environmental  Services Operating Company were Mr.
Myers; Mr. Rasile;  Mr. Backus;  Zenaido Quintana,  Vice President -- Commercial
Sales and Marketing of Fluor ESOC;  Rhonnie L. Smith,  Vice President -- Federal
of Fluor ESOC; and Stan Kimmel,  Vice President -- Technology of Fluor ESOC. The
companies prepared forecasts,  developed a preliminary  operating structure that
included Mr.  Myers as Chairman,  Mr.  Barber as President  and Chief  Executive
Officer  and Mr.  Smith as Vice  President  and  General  Manager of  Government
Operations,   and  reviewed   integration  issues  related  to  human  resources
(principally  differences  in  benefits  provided  by GTI  and  FDESI),  federal
government  operations  (principally  organizational  staffing  of the  combined
operations of GTI and FDESI) and marketing (principally  differences between GTI
and Fluor in the ways the organizations market  environmental  services to their
respective  customers).  At the same time, the companies  engaged in substantial
"due diligence"  investigations and explored various legal and accounting issues
associated with alternative  means of structuring the  Transactions.  Based upon
the  perceived  potential  benefits of an investment by Fluor and the results of
initial  meetings between  management of the two companies,  the Board concluded
that it was in the best interests of GTI's stockholders to continue to explore a
possible  investment  by Fluor  and  authorized  the  execution  of a letter  on
November 2, 1995  requested by Fluor that provided the Company would not solicit
any business  combination or  acquisition  from a third party until December 31,
1995,  but  afforded the  opportunity  to other  companies  to make  acquisition
proposals to GTI.

                                       16
<PAGE>

    Between November 14 and December 11, 1995, the companies conducted intensive
negotiations  of the  terms of  Fluor's  revised  proposal,  which  negotiations
ultimately  resulted in the Investment  Agreement,  the Option Agreement and the
Marketing Agreement.  Negotiations focused upon the determination of a valuation
of  FDESI,  on  Fluor's  ownership  percentage  of the New  Common  Stock of the
Company,  on corporate  governance issues that would provide protections for the
minority stockholders of the Company for a period after the Transactions, and on
the payment for and  exercise  price of the Option.  Other major issues were the
termination  provisions,  the  fee and  expense  reimbursement  provisions,  and
indemnification  by Fluor for certain  matters  covering  FDESI.  On December 1,
1995,  GTI and Fluor each issued a press  release  which stated the parties were
engaged in discussions  regarding a substantial  investment by Fluor in exchange
for a majority  interest in the Company,  which would include a distribution  of
cash to GTI's stockholders.

    The negotiations  involved,  at various times,  members of GTI's and Fluor's
respective  management and the parties' legal and financial advisors. At the end
of  negotiations,  the parties  agreed to a proposal  that would result in Fluor
holding  approximately  55% of the Company's  outstanding New Common Stock after
the  Recapitalization  and  Merger,  and  the  holders  of all of the  Company's
outstanding  Shares immediately prior to the  Recapitalization  and Merger would
hold  approximately  45% of the  Company's New Common Stock and would receive an
aggregate of approximately $60 million in the Recapitalization.  At December 11,
1995, 6,962,196 Shares were outstanding.  Accordingly,  at December 11, 1995, an
aggregate of 4,400,000 shares of New Common Stock were to be issued to Fluor and
approximately  3,671,860  shares of New  Common  Stock  were to be issued to the
holders of the Company's outstanding Shares,  representing a ratio of .5274 of a
share  of  New  Common  Stock  for  each  outstanding  share  of  Common  Stock,
immediately upon consummation of the Transactions.

    In reviewing alternative  structures to provide Fluor with majority interest
in the Company in a transaction  that would involve  distributing  GTI's cash to
its  stockholders as proposed by Fluor,  the Board  considered  several factors.
Among the factors  considered was the desire to simplify as much as possible the
transactions, given that Fluor offered a combination of cash and shares of FDESI
as  consideration  for the majority  interest in GTI and given the desire of the
parties to distribute the Company's cash to its stockholders.  In addition,  the
Board  considered it important to obtain more favorable  capital gains treatment
instead of ordinary income treatment for the stockholders  given that cash would
be  distributed  to the Company's  stockholders.  The Board also believed it was
desirable to treat all  stockholders  equally in the distribution of cash and in
providing an opportunity  to continue to participate in the long-term  prospects
of the Company following the transactions. To meet these objectives, the parties
agreed upon the Recapitalization and Merger.

    The parties were also involved in intensive negotiations regarding issues of
corporate governance. The Board recognized that the Company's stockholders prior
to the  Transactions  would  hold less than a majority  of the New Common  Stock
outstanding after the Transactions,  and accordingly the Company  negotiated for
provisions  in the  Investment  Agreement  that,  until April 30, 1999,  certain
transactions  between the  Company and Fluor,  as well as the sale of New Common
Stock held by Fluor,  be approved by a majority of independent  Board members in
the exercise of their fiduciary responsibilities.  See "THE INVESTMENT AGREEMENT
- -- Certain Restrictions on Fluor and the Company following the Closing."

    On  December  8,  1995,  the  Board of  Directors  convened  to  review  the
Investment  Agreement  and  related  agreements.  The  Board  of  Directors  had
previously  convened  formally on November 13 and 21, 1995 to discuss the status
of  negotiations  and to review  terms of the Merger under  negotiation  and the
Recapitalization.  At the  December 8 meeting,  DLJ made a  presentation  to the
Board with respect to its financial  analysis of the proposed  Transactions  and
indicated that it was prepared to deliver an opinion as to the fairness,  from a
financial point of view, of the  consideration to be received by the Company and
its  stockholders,  pursuant  to  the  Transactions,  as  a  whole,  subject  to
satisfactory  completion of the  negotiation  of definitive  agreements  for the
Transactions. The written opinion of DLJ was delivered to the Board of Directors
on December 11, 1995 and subsequently confirmed in writing as of March 27, 1996.
See "Opinion of Financial  Advisor." A copy of the March 27, 1996 opinion of DLJ
is attached as Annex B and should be read in its entirety.

                                       17
<PAGE>

    The Board of Directors  reconvened on December 11, 1995 and,  based upon the
recommendation of management, the results of legal and accounting due diligence,
the written  opinion of DLJ confirming its prior oral opinion,  and the terms of
the  Investment  Agreement,   approved  the  Investment  Agreement,  the  Option
Agreement  and  the  Recapitalization  and  determined  to  recommend  that  the
stockholders vote for the approval and adoption of the Investment  Agreement and
the  Recapitalization  and Merger. The Investment Agreement and Option Agreement
were then  executed by the parties on the evening of December 11, 1995,  and GTI
and Fluor each announced the Transactions on the morning of December 12, 1995.

GTI'S REASONS FOR THE TRANSACTIONS; RECOMMENDATION OF THE BOARD OF DIRECTORS

    By  unanimous  vote at the  December  11  meeting,  the  Company's  Board of
Directors  approved the Investment  Agreement and the transactions  contemplated
thereby  (including the  Recapitalization  and Merger) and the Option Agreement,
and determined that such  transactions  are fair to and in the best interests of
GTI and its  stockholders.  Each member of the Board of Directors  has indicated
that he intends to vote all  Shares  that he owns in favor of the  Transactions.
The  Board  of  Directors  unanimously  recommends  that  stockholders  vote for
approval of the Transactions.

    The  Board  believes  that the  Transactions  with  Fluor  provide  a unique
opportunity for GTI and that it is consistent with the Company's  strategy.  See
"GTI'S STRATEGIC PLANNING."

    First, the Board believes that the $8.62 in cash and .5274 of a share of New
Common Stock to be received by stockholders  pursuant to the Recapitalization in
respect  of  each  of  their  Shares,  as  negotiated  by  the  parties,  allows
stockholders to realize an immediate return on their investment in GTI at a fair
price.  The  Transactions  represent  an $8.62 per Share cash payout  against an
approximately  $13.11  per share  90-day  average  pre-December  1  announcement
trading price and permits  stockholders to retain a substantial  equity interest
in GTI in the form of the shares of New Common Stock. In this regard,  the Board
views  the  Transactions  as,  in  effect,  a  means  for  stockholders  to sell
approximately   47%  of  their  shares  for  cash  at  an  effective   price  of
approximately  $18.25 per share  (calculated  by  dividing  $8.62 to be paid per
Share by the .4726 of each Share to be relinquished in the Recapitalization) and
to retain  (after taking into account the issuance of New Common Stock to Fluor)
ownership of 45% of the Company's outstanding capital stock. The Board also took
into account,  however,  that no  assurances  can be given that the value of the
equity interest in GTI retained by stockholders  following the Transactions will
equal the  consideration  received by  stockholders in respect of the portion of
their equity  interest in GTI which is in effect sold by them in the  Recapital-
ization,  and also took into  account  that the voting  power of GTI's  existing
stockholders  will, as a result of the acquisition of  approximately  55% of the
equity of the Company by Fluor pursuant to the Merger, be substantially  diluted
compared to that currently held by GTI's existing stockholders.

    Second, the Board considers it important that the current  stockholders will
have the  opportunity to continue to  participate in the long-term  prospects of
the Company following the  Transactions.  As indicated below, the Board believes
that  such  prospects  will  be  significantly  enhanced  as  a  result  of  the
affiliation with Fluor. Given the dilution in the voting power of GTI's existing
stockholders,  the  Board  took  into  account  that  the  corporate  governance
provisions  of the  Investment  Agreement  which were  designed  to protect  the
interests of minority  stockholders  following the  Transactions.  The Board was
aware that the reduced  public float of the New Common Stock could also function
as a limit on the potential value of stockholders' continuing investment in GTI.
At the same time,  the Board also took into  account  the  corporate  governance
provisions  of  the  Investment  Agreement  that,  subject  to  approval  by the
independent members of the Board of Directors,  restrict the ability of Fluor to
acquire the balance of the equity  interest in the Company until April 30, 1999.
See "THE INVESTMENT AGREEMENT -- Restrictions on Fluor and the Company following
the Closing."

    Third,  the Board believes that the  arrangements  provided by the corporate
governance  provisions  of the  Investment  Agreement  will  help  to  alleviate
potential  disruptions  in the Company and the  operation of its business due to
the new  ownership  structure.  This will enable GTI's  management to focus more
completely on realizing the potential  benefits of the  affiliation  with Fluor,
and thus will serve the interests of its stockholders.

                                       18
<PAGE>

    Fourth,  the  affiliation  of GTI  with  Fluor  that  will  result  from the
Marketing  Agreement  will  provide  access  to  Fluor's  worldwide   marketing,
engineering and  construction,  and program  management  resources,  and thereby
better enable the Company to penetrate potential markets and, more generally, to
respond  to  the  competitive   challenges  posed  by  current  and  anticipated
developments  in the  environmental  services  market.  GTI  will  serve  as the
preferred  supplier for  environmental  assessment,  permitting and  remediation
services to Fluor and its affiliates worldwide.  The Board recognized,  however,
that there were no  assurances  provided in the  Marketing  Agreement.  See "THE
MARKETING AGREEMENT."

    The Board also considered the  possibilities  of other  opportunities  for a
strategic  alliance that would serve the  Company's  strategic  plan,  using the
Company's  cash and  without  incurring  debt.  The Board  believes  that  using
substantial  debt to  finance  growth is risky  given the  uncertainties  of the
environmental  services market. In its deliberations the Board also considered a
number of  potential  disadvantages  which might result from the  investment  by
Fluor,  including the increased management time required to create the synergies
anticipated  between  the  two  companies,   the  potential  for  fewer  teaming
opportunities  with other  engineering and construction  firms that compete with
Fluor,  and  risks  involved  in  assignment  of  contracts  from  FDESI.  After
discussions  led  by  management,  the  Board  concluded  that  these  potential
disadvantages had been adequately addressed.  Finally, the Board also considered
the opinion of DLJ that the  consideration to be received by the Company and its
stockholders pursuant to the Transactions,  as a whole, is fair from a financial
point of view to the Company and its  stockholders.  See  "OPINION OF  FINANCIAL
ADVISOR."

    In view of the variety of factors considered by the Board in connection with
its evaluation of the Transactions, the Board did not find it practicable to and
did not quantify or otherwise  assign relative  weights to the specific  factors
considered in reaching its determination.

OPINION OF FINANCIAL ADVISOR

    In its role as  financial  advisor to GTI, DLJ was asked by GTI to render an
opinion to the Board of  Directors of GTI as to the  fairness,  from a financial
point of view,  of the  consideration  to be  received  by the  Company  and its
stockholders,  pursuant to the  Transactions,  as a whole. On December 11, 1995,
DLJ issued to the Board its written opinion subsequently confirmed in writing as
of March 27,  1996 (the "DLJ  Opinion")  that,  based  upon and  subject  to the
provisions set forth in such opinion,  the  consideration  to be received by the
Company and its stockholders  pursuant to the Transactions,  as a whole, is fair
from a  financial  point of view to the Company  and its  stockholders.  The DLJ
Opinion  addresses  fairness to the Company as well as the stockholders  because
part of the  consideration for the Transactions will be received directly by the
Company  (namely,  all of the shares of FDESI and the Marketing  Agreement) with
the value being  received  indirectly by the  stockholders  in the form of their
equity interest in the newly constituted company, Fluor Daniel GTI, Inc.

    THE FULL TEXT OF THE  WRITTEN  OPINION  OF DLJ,  DATED  MARCH 27,  1996,  IS
ATTACHED HERETO AS ANNEX B. GTI  STOCKHOLDERS  ARE URGED TO READ THE DLJ OPINION
CAREFULLY IN ITS ENTIRETY FOR ASSUMPTIONS MADE,  MATTERS  CONSIDERED,  SCOPE AND
LIMITS OF THE REVIEW AND  PROCEDURES  FOLLOWED  BY DLJ IN  CONNECTION  WITH SUCH
OPINION.

    The Board of Directors selected DLJ as its financial advisor because it is a
nationally  recognized investment banking firm and because the principals of DLJ
have  substantial  experience  in the  environmental  services  industry and are
familiar with GTI and its  businesses.  DLJ, as part of its  investment  banking
services,  is regularly engaged in the valuation of businesses and securities in
connection with mergers, acquisitions, underwritings, sales and distributions of
listed and unlisted  securities,  private  placements and valuations for estate,
corporate and other purposes.

    The DLJ Opinion does not constitute a  recommendation  to any stockholder as
to how  such  stockholder  should  vote  at the  Special  Meeting  nor  does  it
constitute  an  opinion  as to the  price at which  the GTI  Common  Stock  will
actually trade at any time. The  Transactions  were negotiated at arms-length by
GTI and Fluor,  and DLJ did not, and was not requested by the Board to, make any
recommendation  as to the form or amount of consideration to be paid by Fluor in
the  Transactions.  No restrictions or limitations  were imposed by GTI upon DLJ
with respect to the  investigations  made or the  procedures  followed by DLJ in
rendering the DLJ Opinion. GTI did not authorize DLJ to solicit, and DLJ did not
solicit,  any third party  indications of interest in a purchase of, or business
combination with, GTI.

                                       19
<PAGE>

    In arriving at its  opinion,  DLJ  reviewed the  Investment  Agreement,  the
Option Agreement and the Marketing  Agreement.  DLJ also reviewed  financial and
other information that was publicly available or furnished to it or on behalf of
GTI and Fluor,  including  information  provided during  discussions  with their
respective  managements,  and (i)  consolidated  financial  statements and other
information  of GTI for the fiscal  years 1993  through 1995 and for the interim
periods  ending  January 28 and January 27,  respectively,  for the fiscal years
1995 and 1996 and (ii) consolidated  financial  statements and other information
of FDESI for the year ended April 30, 1995 and the nine months ended January 31,
1996.  Included in the information  provided were certain financial  projections
for GTI and GTI and  FDESI  combined  for the  years  ended  April  1997 to 2006
prepared by the  managements  of GTI and Fluor.  In  addition,  DLJ examined the
impact of the  Transactions  on earnings  per share of GTI taking into  account,
among  other  things,  the  operating  synergies  expected  to  result  from the
Transactions,  as  prepared  by the  respective  managements  of GTI and  Fluor;
compared  certain  financial and securities data of GTI with selected  companies
whose  securities are traded in public  markets;  reviewed the historical  stock
prices and trading  volumes of GTI Common  Stock;  reviewed  prices and premiums
paid in certain other  selected  business  combinations;  performed a discounted
cash  flow  analysis  of GTI and  valued  the  incremental  contribution  of the
Transactions to GTI. DLJ also reviewed with the managements of GTI and Fluor the
assumptions  on which its  analyses  were  based and  other  factors,  including
historical and projected financial results of such companies. DLJ also conducted
such  other  financial  studies,  analyses  and  investigations  as  DLJ  deemed
appropriate for purposes of rendering its opinion.

    In  rendering  the  DLJ  Opinion,  DLJ  relied  upon  and  assumed,  without
independent verification, the accuracy,  completeness and fairness of all of the
financial and other  information  that was available to it from public  sources,
and that was  provided  to it by the  Company  and  Fluor,  or their  respective
representatives,  or that was  otherwise  reviewed  by it.  With  respect to the
financial  projections supplied to DLJ, it assumed that they had been reasonably
prepared  on a basis  reflecting  the best  currently  available  estimates  and
judgments of the managements of the Company and Fluor as to the future operating
and financial performance of the Company following the Transactions. DLJ has not
assumed  any  responsibility  for  making  any  independent  evaluation  of  the
Company's assets or liabilities or for making an independent verification of any
of the  information  reviewed by DLJ. DLJ has relied as to all legal  matters on
advice of counsel to the Company.

    The DLJ Opinion is  necessarily  based on economic,  market,  financial  and
other  conditions as they existed on, and on the  information  made available to
DLJ as of, the date of the DLJ Opinion.  It should be understood that,  although
subsequent  developments  may  affect  its  opinions,  DLJ  does  not  have  any
obligation to update, revise or reaffirm the DLJ Opinion.

    The following is a summary of all material factors  considered and principal
financial analyses performed by DLJ to arrive at the DLJ Opinion.

    ANALYSIS OF CERTAIN OTHER PUBLICLY TRADED COMPANIES.  To provide  contextual
data and comparative market information,  DLJ compared selected historical share
price, earnings, and operating and financial ratios for GTI to the corresponding
data and ratios of certain other companies whose securities are publicly traded,
which  companies  were selected for  comparison  because as a group they possess
business,   operating   and  financial   characteristics   which  are  generally
representative of companies in the industry in which GTI and FDESI operate.  The
selected companies were: Dames & Moore, Emcon,  Harding  Associates,  ICF Kaiser
International,  International  Technology,  Tetra Tech, TRC Companies and Roy F.
Weston.  Such data and ratios included  Enterprise Value (defined as the product
of the  stock  price  and  total  shares  outstanding  plus Net Debt  (debt  and
preferred stock less cash and cash equivalents)) as a multiple of gross revenue,
earnings before interest, taxes and depreciation and amortization ("EBITDA") and
earnings  before  interest  and taxes  ("EBIT") for the latest  reported  twelve
months  and the growth  rates of each of such  items for the three  most  recent
fiscal years and operating  margins for the three most recent fiscal years.  The
median multiple of Enterprise Value to gross revenue for the companies  reviewed
was 0.35 times.  A range of multiples of gross revenue of 0.33 to 0.38 times was
then applied to GTI's latest  twelve months ended January 27, 1996 gross revenue
to arrive at an implied total  Enterprise  Value range for GTI of $57.5 to $66.2
million.  The implied Enterprise Value for GTI was then adjusted for net cash of
$32.8  million by adding $32.8 million to the implied  Enterprise  Value at each
extreme of the range to yield an implied  equity  value  range of $90.3 to $99.0
million.  The median  multiple of  Enterprise  Value to EBITDA for the 

                                       20
<PAGE>

companies  reviewed was 5.5 times.  A range of multiples of EBITDA of 5.0 to 6.0
times was then applied to GTI's  latest  twelve  months  ended  January 27, 1996
EBITDA to arrive at an implied total  Enterprise Value range for GTI of $59.5 to
$71.4 million.  The implied  Enterprise  Value for GTI was then adjusted for net
cash of $32.8 million to yield an implied  equity value range of $92.3 to $104.2
million.  The median  multiple  of  Enterprise  Value to EBIT for the  companies
reviewed  was 8.2 times.  A range of  multiples  of EBIT of 7.5 to 8.5 times was
then applied to GTI's latest twelve months ended January 27, 1996 EBIT to arrive
at an implied total  Enterprise  Value range for GTI of $42.0 to $47.6  million.
The implied  Enterprise  Value for GTI was then  adjusted  for net cash of $32.8
million to yield an implied  equity  value range of $74.8 to $80.4  million.  In
addition, DLJ examined the ratios of current stock prices to latest twelve-month
net income and  calendar  year 1996 net income (as  estimated by First Call Real
Time Earnings Estimates ("First Call"));  and current stock prices to book value
for these  companies  and  compared  such ratios  with those of GTI.  The median
multiple of stock  price to latest  twelve  months net income for the  companies
reviewed  was 13.1  times.  A range of  multiples  of net income of 12.5 to 13.5
times was then applied to GTI's latest  twelve months ended January 27, 1996 net
income to  arrive at an  implied  equity  value  range for GTI of $52.5 to $56.7
million.  The median  multiple of stock  price to  estimated  calendar  1996 net
income (as estimated by First Call) for the companies reviewed was 11.4 times. A
range of  multiples  of calendar  1996 net income of 11.0 to 12.0 times was then
applied  to GTI's'  estimated  calendar  1996 net income to arrive at an implied
equity  value range for GTI of $75.9 to $82.8  million.  The median  multiple of
stock price to book value for the companies  reviewed was 0.8 times.  A range of
multiples  of Book  Value of 0.7 to 0.9 times was then  applied  to GTI's'  book
value to  arrive  at an  implied  equity  value  range for GTI of $69.8 to $89.7
million.

    TRANSACTION  ANALYSIS.  DLJ  reviewed  publicly  available  information  for
selected transactions completed since December 1993 involving the combination of
environmental   consulting/engineering   firms.  The  comparative   transactions
reviewed (the  "Comparative  Transactions")  included:  (i) Tyco  International/
Earth  Technology;  (ii)  Tetra  Tech/PRC  Environmental;   (iii)  OHM  Corpora-
tion/Rust  International;   (iv)  Dames  &  Moore/Walk,   Haydel;  (v)  Dames  &
Moore/O'Brien-Krietzberg;   (vi)  Earth  Technology/Hazwaste  Industries;  (vii)
Canonie  Environmental/Riedel  Environmental  Services;  (viii) Foster  Wheeler/
Enserch  Environmental;  (ix)  Earth  Technology/Summit  Environmental;  (x) TRC
Companies/Environmental Solutions; and (xi) Heidemij N.V./Geraghty & Miller. The
Comparative  Transactions selected are not intended to represent a complete list
of environmental  consulting/engineering  firm transactions  which have occurred
during the last three years;  rather they include  only  transactions  involving
combinations   of  companies  with  operating  size  or  financial   performance
characteristics  believed to be comparable to such  characteristics  of GTI. DLJ
reviewed  the  consideration  paid in such  transactions  in terms of the Equity
Purchase  Price  (offer  price  per  share  multiplied  by total  common  shares
outstanding) plus total debt less cash and cash equivalents  ("Adjusted Purchase
Price") as a multiple of gross  revenue,  EBITDA and EBIT. The ratio of Adjusted
Purchase Price to gross revenue, computed for the Comparative Transactions had a
median  multiple of 0.56 times. A range of multiples of gross revenue of 0.53 to
0.58 times was then applied to GTI's'  latest  twelve  months ended  January 27,
1996 gross revenue to arrive at an implied total  Enterprise Value range for GTI
of $92.3 to  $101.0  million.  The  implied  Enterprise  Value  for GTI was then
adjusted for net cash of $32.8 million to yield an implied equity value range of
$125.1 to  $133.8  million.  The ratio of  Adjusted  Purchase  Price to  EBITDA,
computed for the Comparative  Transactions had a median multiple of 7.7 times. A
range of  multiples  of EBITDA of 7.0 to 8.0  times  was then  applied  to GTI's
latest twelve months ended January 27, 1996 EBITDA to arrive at an implied total
Enterprise Value range for GTI of $83.3 to $95.2 million. The implied Enterprise
Value  for GTI was  then  adjusted  for net cash of  $32.8  million  to yield an
implied  equity value range of $116.1 to $128.0  million.  The ratio of Adjusted
Purchase Price to EBIT,  computed for the Comparative  Transactions had a median
multiple of 11.8 times.  A range of  multiples of EBIT of 11.5 to 12.5 times was
then  applied to GTI's'  latest  twelve  months  ended  January 27, 1996 EBIT to
arrive at an  implied  total  Enterprise  Value  range for GTI of $64.4 to $70.0
million.  The implied Enterprise Value for GTI was then adjusted for net cash of
$32.8 million to yield an implied equity value range of $97.2 to $102.8 million.

    DLJ also reviewed the  consideration  paid in such  transactions in terms of
Equity  Purchase  Price as a multiple of the net income for the latest  reported
twelve months prior to the announcement of such transaction. The median multiple
of Equity  Purchase  Price to latest  twelve months net income for the 

                                       21
<PAGE>

companies reviewed was 15.3 times. A range of multiples of net income of 15.0 to
16.0 times was then applied to GTI's'  latest  twelve  months ended  January 27,
1996 net income to arrive at an implied  equity  value range for GTI of $63.0 to
$67.2 million.

    DISCOUNTED  CASH FLOW ANALYSIS.  DLJ also  performed a discounted  cash flow
analysis of GTI. In conducting its analysis,  DLJ relied on certain assumptions,
financial forecasts and other information provided by GTI management.  Using the
information  set forth in the GTI forecast,  DLJ calculated the estimated  "Free
Cash Flow" based on projected  unleveraged  operating  income  adjusted for: (i)
taxes;   (ii)  certain   projected   non-cash  items  (i.e.,   depreciation  and
amortization);  (iii) projected  changes in non-cash working  capital;  and (iv)
projected capital expenditures. DLJ analyzed the GTI forecast and discounted the
stream of free cash flows  from  fiscal  1997 to fiscal  2006  provided  in such
projections  back to April 30, 1996 using discount rates ranging from 9% to 11%.
To estimate the residual  value of GTI at the end of the  forecast  period,  DLJ
applied  terminal  multiples of 4.5 times to 5.5 times to the  projected  fiscal
2006  EBITDA and  discounted  such value back to April 30,  1996 using  discount
rates ranging from 9% to 11%. DLJ then summed the present value of the free cash
flows and the present value of the residual  values to derive a range of implied
enterprise  values  for GTI of $83.7  million  to $97.7  million.  The  range of
implied  enterprise  values  of GTI was  then  adjusted  for net  cash  and cash
equivalents  of $32.8  million to yield an implied  equity value range of GTI of
$116.5 million to $130.5 million (based on a terminal  multiple  midpoint of 5.0
times).

    PRO FORMA  TRANSACTION  ANALYSIS.  DLJ  analyzed  certain pro forma  effects
resulting from the Transactions. DLJ reviewed, without independent verification,
the operating synergies  contemplated to result from the merger by combining the
operations  of GTI and FDESI as projected by the  managements  of GTI and Fluor.
DLJ analyzed the pro forma effect of such operating  synergies on net income and
earnings per share for GTI. The analysis  indicated  that the pro forma earnings
per share of GTI, assuming the operating  synergies  contemplated to result from
the  Transactions  would be 28% higher in the fiscal  year  ending  1997 and 33%
higher in the fiscal year ending 1998 than  comparable  projections for GTI as a
stand-alone  company  during  the same  period.  The  results  of the pro  forma
combination analysis are not necessarily  indicative of future operating results
or financial position.

    INCREMENTAL  CONTRIBUTION  OF  TRANSACTIONS  TO GTI.  DLJ also  performed  a
discounted  cash flow analysis of the expected  incremental  contribution of the
Transactions  to  GTI.  In  conducting  its  analysis,  DLJ  relied  on  certain
assumptions, financial forecasts and other information provided by GTI and Fluor
management.  Using  the  information  set  forth in the GTI and  FDESI  combined
forecast,  DLJ calculated the estimated incremental "Free Cash Flow" expected to
be generated  as a result of the  Transactions  based on  projected  unleveraged
operating income adjusted for: (i) taxes; (ii) certain projected  non-cash items
(i.e.,  depreciation  and  amortization);  (iii)  projected  changes in non-cash
working capital; and (iv) projected capital  expenditures.  DLJ analyzed the GTI
and FDESI  combined  forecast and  discounted the stream of free cash flows from
fiscal 1997 to fiscal 2006 provided in such  projections  back to April 30, 1996
using  discount  rates ranging from 9% to 11%. To estimate the residual value of
the  incremental  contribution  of the  Transactions  at the end of the forecast
period,  DLJ  applied  terminal  multiples  of 4.5  times  to 5.5  times  to the
projected  fiscal 2006 EBITDA and  discounted  such value back to April 30, 1996
using  discount  rates ranging from 9% to 11%. DLJ then summed the present value
of the free cash flows and the present value of the residual  values to derive a
range of implied  enterprise  values  for the  incremental  contribution  of the
Transactions  of $53.0 million to $66.8 million  (based on a 5.0 times  terminal
multiple).   The  range  of  implied   enterprise  values  for  the  incremental
contribution  of the  Transactions  was  then  adjusted  for net  cash  and cash
equivalents  of $7.8  million  which would be  remaining  in the Company  giving
effect to the recapitalization as of January 27, 1996 to yield an implied equity
value range of $60.8 to $74.6  million.  Based on GTI's equity  ownership of the
company  after  the   Transactions  of  45.5%,  the  value  of  the  incremental
contribution of the Transactions to GTI was estimated at $27.7 to $34.0 million.

    SUMMARY VALUATION.  DLJ also prepared a summary valuation which compared the
value received by GTI as a result of the  Transactions,  with the value given to
Fluor.  Value  received,  consisting  of cash to be paid by Fluor for GTI Common
Stock and  warrants  on  1,366,000  additional  shares  (exercisable  at $17 per
share), plus 45.5% of the incremental  contribution of the Transactions,  ranged
from $62.7 to $69.0  million.  Value given to Fluor,  consisting of 54.5% of the
GTI value range which was based on the GTI valuation  analyses  described above,
plus the  estimated  value of the  Option,  ranged  from $59.0  million to $64.5
million.

                                       22
<PAGE>

    The summary set forth above does not purport to be a complete description of
the analyses  performed by DLJ. The preparation of a fairness  opinion  involves
various  determinations  as to the most  appropriate  and  relevant  methods  of
financial  analysis  and the  application  of these  methods  to the  particular
circumstances  and,  therefore,  such an opinion is not readily  susceptible  to
summary   description.   Accordingly,   notwithstanding   the  separate  factors
summarized  above,  DLJ believes that its analyses must be considered as a whole
and that  selecting  portions of its analyses and the factors  considered by it,
without considering all analyses and factors, could create an incomplete view of
the evaluation process  underlying the DLJ opinion.  In performing its analyses,
DLJ made numerous assumptions with respect to industry performance, business and
economic  conditions  and other matters.  The analyses  performed by DLJ are not
necessarily  indicative  of  actual  values  or  future  results,  which  may be
significantly more or less favorable than suggested by such analyses.

    Pursuant to the terms of an engagement  letter dated  November 1, 1995,  GTI
has agreed to pay DLJ a retainer  fee of  $50,000;  a fee of  $350,000  upon the
delivery of the DLJ Opinion;  and an additional  fee of $700,000 to be paid upon
consummation of the Transactions.  GTI has also agreed to reimburse DLJ promptly
for all out-of-pocket  expenses (including the reasonable fees and out-of-pocket
expenses of counsel)  incurred by DLJ in connection with its engagement,  and to
indemnify  DLJ and  certain  related  persons  against  certain  liabilities  in
connection  with  its  engagement,   including  liabilities  under  the  federal
securities laws.

    In the ordinary  course of business,  DLJ actively  trades the securities of
both GTI and Fluor for its own  account and for the  accounts  of its  customers
and,  accordingly,  may at any  time  hold a long  or  short  position  in  such
securities.

FLUOR AND FDESI'S REASONS FOR THE TRANSACTIONS

    In reaching its  determination  to approve the Investment  Agreement and the
Transactions,  the Fluor Board of Directors (the "Fluor Board") and the Board of
Directors of its parent corporation,  Fluor Corporation,  considered a number of
factors,  including,  without  limitation,  the following:  (i) a review of GTI,
including a presentation by Fluor management  regarding its due diligence review
of GTI;  (ii) a review of advice of  management,  financial  and legal  advisors
regarding  the terms of the  Investment  Agreement and the  Transactions;  (iii)
Fluor's existing position in the environmental  services industry and its desire
to  strengthen  and expand  its  presence  in the  industry;  (iv) the  quality,
diversity and  experience  of the personnel of GTI; and (v) GTI's  experience in
the environmental services industry which would be complimentary to the needs of
Fluor,  including GTI's extensive experience in remediation services utilizing a
wide spectrum of technologies.

    The analysis included advice from Fluor's financial advisors  concerning (i)
the historical  results of GTI; (ii) the potential for growth in earnings of GTI
following the proposed Transactions;  (iii) historical market prices and trading
volume of GTI Common Stock; (iv) comparable merger or acquisition  transactions;
and (v) ranges of estimates of value of GTI based on various analyses. The Board
also  considered the  Transactions'  prospective  impact on Fluor  Corporation's
earnings per share, as well as  opportunities  for cost savings.  The Board also
focused on the revenue enhancements expected to result from the Transactions and
the   respective   contributions   the  parties  would  bring  to  the  combined
corporation.

    The Fluor  Board did not  assign  any  specific  or  relative  weight to the
factors  under  its   consideration.   The  Fluor  Board   determined  that  the
Transactions  are in the best  interests of Fluor and its sole  stockholder  and
therefore unanimously approved the Transactions. The Board of Directors of Fluor
Corporation also unanimously approved the Transactions. The Transactions are not
subject to the approval of the  stockholder of Fluor,  nor the  stockholders  of
Fluor Corporation.

BOARD OF DIRECTORS AND OFFICERS

    Pursuant  to  the  Investment  Agreement,   the  directors  of  the  Company
immediately  upon the  Closing  shall  consist  of  Walter  C.  Barber,  current
Chairman,  President and Chief  Executive  Officer of GTI;  Allan S. Bufferd and
Robert P. Schechter,  who are currently  independent  directors of GTI; David L.
Myers,  J.  Michal  Conaway  and  James  C.  Stein,  who are  members  of  Fluor
management;  and Ernie 

                                       23
<PAGE>

Green, an independent director designated by Fluor. See "ELECTION OF DIRECTORS."
In addition to its current  officers,  upon  consummation  of the  Transactions,
three new Vice Presidents of GTI will be elected:  Rhonnie Smith,  John Wood and
Don Stokley, all currently members of FDESI management.

    The Amended and Restated  Certificate  of  Incorporation  will eliminate the
current  classified Board of Directors.  After consummation of the Transactions,
all  directors  will be  elected  to serve  until  the next  annual  meeting  of
stockholders or until their earlier resignation or removal.  The Amended By-Laws
further provide that any vacancy in the Board of Directors may be filled only by
a majority vote of the directors then in office, with any such successor to hold
office for the  unexpired  term of his  predecessor  and until his  successor is
elected  or  appointed,  as the case may be, and  qualified,  or until he sooner
dies,  resigns,  is removed or becomes  disqualified.  See "AMENDED AND RESTATED
CERTIFICATE OF INCORPORATION" and "AMENDMENTS TO BY-LAWS."

CONFLICTS OF INTEREST

    Election of  Directors.  The  Investment  Agreement  provides  that  Messrs.
Barber,  Bufferd  and  Schechter  shall be  elected  to the  Company's  Board of
Directors  immediately upon the Closing. In addition,  the Investment  Agreement
provides  that,  until the annual meeting of  stockholders  of the Company to be
held in 1998, Fluor shall cause Messrs. Bufferd and Schechter to be nominated as
directors and will vote all of its shares of New Common Stock for those nominees
in any election of directors.  See "THE INVESTMENT  AGREEMENT -- Restrictions on
Fluor and the Company Following the Closing."

    Employment  Agreements.  During the negotiation of the Investment Agreement,
the Board determined that the proposed  Transactions posed significant  personal
uncertainty   to  certain  key  employees  who  were  important  to  either  the
consummation and  implementation of the Transactions,  or the realization of the
anticipated  benefits  of the  affiliation  with  Fluor and the  conduct  of the
Company's business after the Transactions, or both. For that reason, in December
1995 the Board  authorized the Company to enter into employment  agreements with
certain of its employees, including its executive officers, in order to insulate
them  from  the  distractions  and the  personal  uncertainties  created  by the
negotiation  and  potential  execution  of  the  Investment  Agreement  and  the
implementation of the affiliation with Fluor thereafter so as to assure that the
stockholders  and the  Company  would  have the full  benefit  of the  undivided
attention of these employees.

    The Company entered into employment agreements with Mr. Barber, (the "Barber
Agreement") and the Company's  executive  officers:  Wendell W. Lattz,  Frank J.
Gorry, J. Steven Paquette, Robert E. Sliney, Jr., Glenn V. Batchelder, Catherine
L. Farrell and Anne Nolan (the "Executive Officer Agreements" and,  collectively
with the Barber Agreement, the "Employment Agreements"), as well as other senior
employees of the Company.

    Terms of Employment  Agreements.  The Employment Agreements provide that the
employee  shall be  employed  with the  Company  for a  designated  period  (the
"Employment   Period")  following  the  consummation  of  a  Change  of  Control
Transaction  (the  "Effective  Date").  A "Change  of Control  Transaction,"  is
defined as a single transaction or group of related transactions involving Fluor
resulting  in  the  stockholders  of  the  Company  immediately  prior  to  such
transaction  holding  less  than 50% of the  outstanding  stock  of the  Company
immediately  after  such  transaction.  The  Employment  Period  for the  Barber
Agreement and the Executive  Officer  Agreements  are three years and two years,
respectively. In general, the Employment Agreements specify that the employee is
to remain employed in a position having comparable responsibilities as that held
by the employee on the date of the relevant Employment  Agreement at a salary no
lower than the salary  payable to the  employee  on that date,  except  that the
Barber  Agreement  specifies that he be employed as the Chief Executive  Officer
and as a member of the Board of Directors of the Company.  The Executive Officer
Agreements   state,   however,   that   organizational   changes   resulting  in
reassignments or changes in reporting  relationships are to be expected and will
not by themselves result in a breach of Executive Officer Agreements.

    The  Executive  Officer  Agreements  also  provide that the Company will not
require the employee to relocate as a condition of continued  employment  except
where  relocation  is  reasonably  required  by a customer  in  connection  with
long-term  work for such  customer.  The  Employment  Agreements  also  

                                       24
<PAGE>

provide,  however,  that the employee  consider in good faith any request by the
Company  to  relocate,  and  contain  an  acknowledgment  by the  employee  that
employment may entail  substantial  travel,  which travel shall not constitute a
breach of the Employment Agreement.

    The Employment Agreements provide that if, during the Employment Period, the
employee  intends to sell  Company  stock  (either held by the employee or to be
acquired upon the exercise of stock options held by the employee),  the employee
agrees  to offer to Fluor (so long as Fluor  owns at least 50% of the  Company's
outstanding  stock) the right to purchase the employee's stock, in the case of a
sale of stock, or the opportunity to pay the employee the difference between the
exercise  price  and the  fair  market  value  of the  stock  on the date of the
proposed exercise of the option in exchange for the employee's  agreement not to
exercise, in the case of the intended sale of stock immediately upon exercise of
stock options.

    The  Employment  Agreements  terminate if the Effective  Date does not occur
prior to June 30, 1996.

    Benefits Payable Upon Termination.  The Employment  Agreements  provide that
the Company may  terminate  the  employee's  employment  prior to the end of the
Employment  Period without cause upon thirty days' prior written notice.  In the
event of a  termination  without  cause,  the  employee  will be entitled to the
greater of (i) salary at a rate  equal to the  employee's  salary at the time of
termination for the duration of the Employment Period, plus continued payment by
the  Company  of its  portion of all health  benefits  (so long as the  employee
elects to continue benefits and continues to pay his or her share of the cost of
such  benefits) or (ii) all amounts  payable to the employee under the Company's
severance plan as in effect on the date of such termination. In addition, on the
date of such  termination  (x)  all  stock  options  held by the  employee  will
automatically  become fully  exerciseable in accordance with their terms and (y)
all restrictions on any stock granted by the Company to the employee,  including
without limitation any repurchase or vesting provisions, will lapse and be of no
further  force  and  effect.   The  employee  is  also  entitled  to  the  above
compensation  in the event that the Company fails to correct its material breach
of the terms of the  Employment  Agreement  within  ten days  following  written
notification of such material breach by the employee.

    Under the  Employment  Agreements  the Company may terminate the  employee's
employment  prior to the end of the  Employment  Period for cause  upon  written
notice to the employee.  The Employment Agreements define "for cause" to include
one or more of the following:  (i) misappropriation by the employee of any money
or material  amount of other assets or property  (tangible or intangible) of the
Company; (ii) the employee's continuing, repeated and willful failure or refusal
to perform reasonable  assignments given to employee which are commensurate with
such Employee's position or responsibilities;  (iii) conviction of employee of a
felony;  (iv) material breach by employee of any material  Company policy or the
terms  of any  written  agreement  between  employee  and  the  Company.  Upon a
termination for cause,  the Company will pay to the employee salary and benefits
owed to employee as of the date of such termination.

    If the  Company's  executive  officers  were  terminated  without  cause im-
mediately  following  the  anticipated  Closing  Date of May 10,  1996,  the ap-
proximate  value of the severance and other benefits (if the employee  elects to
continue  health  benefits) to such officers  would be as follows:  Mr.  Barber,
$825,692; Mr. Lattz, $322,503; Mr. Gorry, $311,636; Mr. Paquette,  $303,127; Mr.
Sliney, $347,153; Mr. Batchelder, $287,537; Ms. Farrell, $241,700 and Ms. Nolan,
$249,398.

    Restricted  Stock  Award.  Under  the  terms  of a  Restricted  Stock  Award
Agreement  between  Mr.  Barber and the  Company in respect of 20,000  shares of
Common Stock,  consummation  of the  Transactions  will  constitute a "change of
control" upon which all  restrictions  on the  disposition of and all provisions
for  forfeiture  to the Company of such shares will lapse.  Currently all of the
shares are subject to such restrictions.

    Prohibition  Against  Additional  Agreements;  Acceleration.  The Investment
Agreement  provides  that for the period  from the date  thereof to the  Closing
Date, GTI will not and will not permit any of its subsidiaries to (i) enter into
any contract,  agreement, plan or arrangement covering any director,  officer or
employee of GTI or any of its  subsidiaries  that provides for the making of any
payments,  the  

                                       25
<PAGE>

acceleration  of  vesting  of any  benefit  or  right or any  other  entitlement
contingent  upon  (A)  consummation  of  the  Transactions  contemplated  by the
Investment  Agreement  or the Option  Agreement or any  acquisition  by Fluor of
securities of GTI (whether by merger,  tender offer,  private or market purchase
or otherwise) or (B) the  termination of employment  after the occurrence of any
such  contingency if such payment,  acceleration  or entitlement  would not have
been  provided but for such  contingency  or (ii) amend any  existing  contract,
agreement,  plan or arrangement to so provide. GTI also agrees in the Investment
Agreement not to take any steps to accelerate the vesting or  exercisability  of
any employee  stock options or director  stock options  outstanding  on the date
thereof, or otherwise modify the terms of such options, on or before the Closing
Date without the prior written consent of Fluor.  See "THE INVESTMENT  AGREEMENT
- -- Covenants of the Parties."

THE OPTION AGREEMENT

    Simultaneously  with the execution of the  Investment  Agreement on December
11,  1995,  GTI  and  Fluor  entered  into  an  Option  Agreement  (the  "Option
Agreement") pursuant to which GTI sold to Fluor for a cash payment of $1,650,000
an option to purchase up to  1,366,000  shares of Common Stock (or, if exercised
after the closing of the  Transactions,  New Common  Stock) of the Company  (the
"Base Shares") at a per share exercise price of $17.00 per share (the "Per Share
Price"), with both the Base Shares and the Per Share Price subject to adjustment
as described below (the Base Shares, as adjusted,  are herein referred to as the
"Optioned Shares").

    Exercise of the Option. The Option will become  exerciseable after the first
to occur of (i) December 11, 1996 and (ii) Fluor being entitled to terminate the
Investment  Agreement  pursuant to the terms  thereof.  Once  exerciseable,  the
Option may be exercised in whole or in part prior to its  expiration by delivery
by Fluor to the Company of a written notice (the "Notice") specifying the number
of Optioned  Shares to be purchased  and a place and date (the  "Option  Closing
Date")  not later  than 10  business  days from the date of the  Notice  for the
closing of such purchase (the "Option Closing"),  provided that if any approvals
are required under the HSR Act with respect to such exercise, the Option Closing
will be the later of (i) the Option  Closing  Date  specified  in the Notice and
(ii) the next business day following  the date on which the  applicable  waiting
periods under the HSR Act shall have expired. The Option expires on December 11,
1998.

    Adjustment  to Base  Shares  and Per Share  Price.  In  connection  with the
Recapitalization  (so long as the Option is not  exercised  in full prior to the
Closing of the  Transactions),  the aggregate number of shares  purchasable upon
exercise of the Option will be  adjusted by  multiplying  the Base Shares by the
Adjustment  Fraction (as defined below). The Per Share Price will be adjusted by
dividing  the Per Share  Purchase  Price by the  Adjustment  Fraction.  The term
"Adjustment  Fraction"  means a  fraction,  the  numerator  of which  equals the
Current Market Price of the Common Stock and the denominator of which equals the
Current  Market Price of the New Common Stock.  For purposes of the Option,  the
"Current  Market  Price" means the average per share  closing price for the five
trading days (i)  immediately  preceding the Closing of the  Transactions,  with
respect to the Common Stock, and (ii)  immediately  following the Closing of the
Transactions,  with  respect to the New  Common  Stock.  The number of  Optioned
Shares and the Per Share Price are also subject to adjustment upon any change in
the  outstanding  shares of Common  Stock or New  Common  Stock by reason of any
stock dividend, stock split, recapitalization,  combination, exchange of shares,
merger,  consolidation,  reorganization  or any other change in the corporate or
capital structure of the Company (other than the  Recapitalization)  to maintain
without dilution the rights of Fluor under the Option.

    Registration  Rights.  Under the  Option  Agreement,  Fluor is  entitled  to
certain  registration  rights with respect to the Optioned  Shares.  At any time
within three years of any Option Closing, the Company is obligated (i) to effect
up to two registrations under the Securities Act (each a "Demand  Registration")
of any or all of the Optioned Shares,  one of which such  registrations  may, at
Fluor's request,  so long as the Company satisfies the eligibility  requirements
of Form S-3 under the  Securities  Act, be  required to be made on a  continuous
basis  pursuant  to Rule 415 under the  Securities  Act and (ii) at the  written
request of Fluor  delivered  within ten (10) days after the  Company  delivers a
notice to Fluor of the Company's intent to file a registration statement for its
common stock, to include any or all of the Optioned Shares in such  registration
(each an "Incidental Registration"). Fluor may not 

                                       26
<PAGE>

request a Demand  Registration within 120 days following the effective date of a
registration  statement  filed by the Company in which the Optioned  Shares were
entitled to join. In an Incidental Registration, upon the written opinion of the
managing  underwriter  that the requested  distribution of Optioned Shares would
adversely effect the distribution of securities of the Company, the Company may,
at its option,  either (x) require Fluor to agree to delay the offering and sale
of the  Optioned  Shares for a  reasonable  period as  requested by the managing
underwriter or (y) include in the registration  statement only such portion,  if
any,  of the  Optioned  Shares as the  managing  underwriter  advises  may be so
included.  In  addition,  the Company is entitled to suspend any  obligation  to
register  Optioned  Shares for 90 days in any  12-month  period if there  exists
material  non-public  information  about the Company  which,  in the  reasonable
opinion of the Company,  should not be  disclosed.  Under the Option  Agreement,
each of Fluor and GTI agree to  indemnify  the  other  for all  losses,  claims,
damages,  liabilities and expenses arising out of statements or omissions of the
other contained in any registration statement (and related prospectus).

CERTAIN FEDERAL INCOME TAX CONSEQUENCES

    The  following  discussion  summarizes  the  principal  federal  income  tax
consequences of the  Recapitalization  to holders of Common Stock who are United
States persons within the meaning of Section 7701(a)(30) of the Internal Revenue
Code of 1986 (the  "Code"),  and is based upon the  opinion of Testa,  Hurwitz &
Thibeault, counsel to the Company. This discussion does not deal with all income
tax  considerations  that may be  relevant to certain of these  stockholders  in
light of their particular circumstances, such as stockholders who are dealers in
securities, who do not hold both the Common Stock surrendered and the New Common
Stock received in the  Recapitalization  as capital assets within the meaning of
Section 1221 of the Code,  who hold stock  (directly or  indirectly) in Fluor or
FDESI,  or who acquired  their Shares in  connection  with stock option or stock
purchase plans or in other compensatory  transactions.  The discussion also does
not address the federal  income tax  treatment  of the  Recapitalization  to GTI
stockholders who are foreign persons. ACCORDINGLY, GTI STOCKHOLDERS ARE URGED TO
CONSULT  THEIR OWN TAX  ADVISORS  AS TO THE  SPECIFIC  TAX  CONSEQUENCES  OF THE
RECAPITALIZATION, INCLUDING THE APPLICABLE FEDERAL, STATE, LOCAL AND FOREIGN TAX
CONSEQUENCES OF THE RECAPITALIZATION TO THEM.

    The Company will not recognize gain or loss as a result of the Merger or the
Recapitalization.  The Recapitalization will constitute a "reorganization" under
Section  368(a)(1)(E)  of the Code as well as a tax-free  exchange  of stock for
stock  under   Section  1036  of  the  Code.   The  tax   consequences   of  the
Recapitalization to holders of Common Stock will be as follows.

    Gain or Loss. Other than loss  recognized,  if any, upon the receipt of cash
in lieu of a fractional share of New Common Stock, a holder of Common Stock will
not  recognize any loss upon the exchange of that stock for New Common Stock and
cash. However, a holder of Common Stock will recognize capital gain equal to the
lesser of (i) the excess, if any, of the sum of the fair market value of the New
Common Stock and the amount of cash received over the tax basis of the shares of
Common Stock  surrendered  by that holder in the  Recapitalization  and (ii) the
amount of cash received (other than cash received in lieu of a fractional  share
of New Common Stock).

    Basis and Holding Period.  The tax basis of the New Common Stock received in
the  Recapitalization  (including a fractional  share of New Common Stock deemed
received,  as  described  below) will be the same as the tax basis of the Common
Stock  exchanged,  (i) decreased by the amount of cash received (other than cash
received for a fractional share of New Common Stock),  and (ii) increased by the
amount of gain  recognized  on the  receipt of New Common  Stock and cash (other
than gain  attributable  to cash  received in lieu of a fractional  share of New
Common Stock).  The holding period of the shares of New Common Stock received in
the  Recapitalization  will  include the holding  period of the shares of Common
Stock surrendered.

    Fractional Shares. Cash payments in lieu of a fractional share of New Common
Stock  will be  treated  as if that  fractional  share  had been  issued  in the
Recapitalization  and then  redeemed by GTI. A holder of Common Stock  receiving
such cash payment will recognize gain or loss equal to the  

                                       27
<PAGE>

difference,  if any,  between such  holder's tax basis in the  fractional  share
(adjusted  as  described  in the  preceding  paragraph)  and the  amount of cash
received for that fractional  share. Such gain or loss will be long-term capital
gain or loss if the holding  period of the Common Stock treated as exchanged for
the fractional share of New Common Stock was more than one year.

    Backup Withholding. In order to avoid "backup withholding" of federal income
tax on payments of cash to GTI  stockholders,  unless an exception  applies each
GTI  stockholder  must  provide  the payer of such  cash with the  stockholder's
correct  taxpayer  identification  number  ("TIN") on Form W-9 and certify under
penalties  of perjury that such number is correct and that such  stockholder  is
not subject to backup withholding. If a stockholder fails to provide the correct
TIN or any  certification  necessary to establish  that an exemption from backup
withholding  is  available,  the cash  received in the  Recapitalization  may be
subject to backup  withholding  at a 31% rate. A Form W-9 will be provided  with
the  instructions  to be distributed  by the Exchange Agent to GTI  stockholders
after the Closing with respect to the  conversion of shares of Common Stock into
shares of New Common Stock.

CERTAIN LEGAL MATTERS

    Certain   acquisition   transactions  such  as  those  contemplated  by  the
Investment Agreement are reviewed by the Justice Department or the Federal Trade
Commission  ("FTC") to determine  whether they comply with applicable  antitrust
laws. Under the provisions of the Hart-Scott-Rodino  Antitrust  Improvements Act
of 1976, as amended ("HSR Act"), the  Transactions may not be consummated  until
certain information has been furnished to the Justice Department and the FTC and
certain waiting period requirements of the HSR Act have been satisfied.  Certain
information was filed with the Justice  Department and the FTC under the HSR Act
by GTI and by Fluor in February  1996 and the waiting  period was  terminated on
March 14, 1996.

    Regardless of the Company's  compliance with the HSR Act, at any time before
or after the Closing, the FTC could take such action under the antitrust laws as
it deems  necessary or desirable in the public  interest,  including  seeking to
enjoin the  Transactions  or to cause the  divestiture of substantial  assets of
Fluor or GTI.  Private  parties may also bring legal action under the  antitrust
laws under certain circumstances.  There can be no assurance that a challenge to
the Closing on  antitrust  grounds  will not be made or, if a challenge is made,
what the result will be.  Consummation of the Transactions is conditioned  upon,
among other  things,  the absence of any  provisions  of any  applicable  law or
regulation and any judgment,  injunction,  order or decree that will prohibit or
make illegal the consummation of the  Transactions.  The obligations of Fluor to
consummate the Merger are also conditioned upon, among other things, the absence
of any  judgment,  decree or order of any  court or  governmental  authority  of
competent  jurisdiction  prohibiting  Fluor at any time after the Effective Time
from exercising all material  rights and privileges  pertaining to its ownership
of shares of stock of GTI to be acquired  pursuant to the Option  Agreement  and
the Investment  Agreement.  See "THE  INVESTMENT  AGREEMENT -- Conditions to the
Parties' Consummation of the Merger."

    Except as  disclosed  herein,  GTI and  Fluor are not aware of any  federal,
state or foreign  governmental or regulatory  approval that is required in order
to  consummate  the  Merger or the  Transactions.  Should any such  approval  be
required, it is currently contemplated that such approval would be sought.

                                       28
<PAGE>

                         THE INVESTMENT AGREEMENT

GENERAL

    THE FOLLOWING DESCRIPTION OF THE INVESTMENT AGREEMENT DOES NOT PURPORT TO BE
COMPLETE  AND IS  QUALIFIED  IN ITS  ENTIRETY  BY  REFERENCE  TO THE  INVESTMENT
AGREEMENT,  A COPY OF WHICH IS  ATTACHED TO THIS PROXY  STATEMENT/PROSPECTUS  AS
ANNEX A AND INCORPORATED HEREIN BY REFERENCE. ALL STOCKHOLDERS ARE URGED TO READ
THE INVESTMENT AGREEMENT IN ITS ENTIRETY.

THE RECAPITALIZATION

    Pursuant to the  Investment  Agreement,  and subject to the  approval of the
Transactions  by GTI's  stockholders  and the  filing and  effectiveness  of the
Amended and Restated Certificate of Incorporation with the Secretary of State of
Delaware, each share of Common Stock issued and outstanding immediately prior to
the Closing will be converted into the right to receive  consideration per share
(the  "Recapitalization  Consideration")  of (i) .5274 of a share of New  Common
Stock (the  "Recapitalization  Shares") and (ii) $8.62 in cash, without interest
(the  "Recapitalization  Payment").  No fraction of a share of New Common  Stock
will be issued.  Any  stockholder  otherwise  entitled  to a fraction of a share
(after  aggregating all fractional  shares of New Common Stock to be received by
such  stockholder) will be entitled to receive in lieu thereof an amount of cash
equal to the product of (x) the fraction  multiplied by (y) the average  closing
price  of the New  Common  Stock  as  reported  on the NNM  for  the  five  days
immediately following the Closing.

    Exchange of Shares. As soon as practicable after the Closing,  the Company's
exchange agent, State Street Bank and Trust Company (the "Exchange Agent"), will
send a notice and transmittal  form (a  "Transmittal  Letter") to each holder of
record of Common  Stock  immediately  prior to the Closing  Date  advising  such
holder  of the  effectiveness  of the  Recapitalization  and the  procedure  for
surrendering  the  certificate(s)  for  Common  Stock  to be  exchanged  for the
Recapitalization Consideration.  Upon surrender of the certificate(s),  together
with a properly  completed and duly executed  Transmittal  Letter and such other
documents as may be required pursuant thereto,  the holder will be paid promptly
the Recapitalization  Consideration (less any required withholding of taxes) for
the Shares represented by such  certificate(s)  and the certificate(s)  shall be
canceled.  Until so surrendered  and exchanged,  each  certificate  representing
shares  of  Common  Stock  shall  represent  solely  the  right to  receive  the
Recapitalization   Consideration   with   respect   to  such   Shares.   If  the
Recapitalization Consideration is to be paid to any person other than the person
whose name is on the certificate(s) surrendered, it shall be a condition to such
exchange that the person requesting such exchange will pay to the Exchange Agent
any  transfer or other taxes or establish  to the  satisfaction  of the Exchange
Agent that such taxes have been paid or are not applicable.

    Payment Fund.  Prior to the Closing Date GTI,  Fluor and the Exchange  Agent
will enter into a Payment Agreement (the "Payment Agreement") whereby Fluor will
deposit with the Exchange Agent  immediately  prior to the filing of the Amended
and  Restated  Certificate  of  Incorporation  in trust for the  benefit  of GTI
stockholders  cash in the amount of  $33,350,000  (the "Fluor  Deposit") and GTI
will deposit with the Exchange  Agent (the "Company  Deposit") cash in an amount
determined  by  subtracting  the Fluor  Deposit  from the  product  obtained  by
multiplying  (i) the number of shares of Common  Stock  outstanding  immediately
prior to the  Closing  Date by (ii)  $8.62.  The Fluor  Deposit  and the Company
Deposit  are  collectively  referred  to as  the  "Payment  Fund."  The  Payment
Agreement  will provide,  among other things,  that (a) the Exchange  Agent will
maintain  the  Payment  Fund as a  separate  fund to be held for the  benefit of
holders of Common  Stock;  (b) the Payment Fund will not be used for any purpose
not provided for in the Investment Agreement;  (c) the Exchange Agent may invest
the cash  portions  of the Payment  Fund,  upon  direction  of the  Company,  in
obligations  of the United States  government  or any agency or  instrumentality
thereof,  or  obligations  that are guaranteed or insured  thereby;  (d) any net
profit resulting from such investments will be payable to the Company on demand;
(e) to any holder of Common Stock who validly  delivers at least 100,000  shares
of Common Stock,  the Exchange  Agent will make payment of the  Recapitalization
Payment by wire  transfer  within one business day of the date of such  delivery
and of the  Recapitalization  Shares by overnight  courier on the 

                                       29
<PAGE>

next business day, (f) all expenses of the Exchange  Agent will be paid directly
by the Company; and (g) any portion of the  Recapitalization  Consideration that
has not been paid to former  holders of the Common Stock within six months after
the Closing Date will be delivered  to the  Company,  and any former  holders of
shares of Common Stock will  thereafter  look only to the Company for payment of
Recapitalization  Consideration  with respect to such  shares,  and the Exchange
Agent's  duties  will  terminate.  Thereafter,  each  holder  of  a  certificate
representing  shares  of Common  Stock may  surrender  such  certificate  to the
Company and (subject to applicable abandoned property, escheat and similar laws)
receive in  exchange  therefor  the  Recapitalization  Consideration  payable in
respect thereof,  without interest,  but will have no greater rights against the
Company than may be accorded to general  creditors of the Company under Delaware
Law.

THE MERGER

    The  Investment  Agreement  provides  that,  subject to the  approval of the
Transactions  by GTI's  stockholders,  the  satisfaction  or waiver of the other
conditions  to the  Merger,  and the filing by the  parties of an  agreement  of
merger or other  appropriate  documents  (the  "Agreement  of Merger"),  and the
effectiveness  thereof,  Merger Subsidiary will be merged with and into FDESI in
accordance with the California Law,  whereupon the separate  existence of Merger
Subsidiary  will cease and FDESI,  the  surviving  corporation  (the  "Surviving
Corporation"), will be wholly-owned by the Company.

    The Merger will become  effective at such time as the Agreement of Merger is
duly filed with the Secretary of State of California or at such later time as is
specified in the  Agreement of Merger (the  "Effective  Time").  It is currently
anticipated  that the filing of the  Agreement of Merger will be made as soon as
practicable after all conditions  contemplated by the Investment  Agreement have
been satisfied or waived, currently anticipated to be May 10, 1996, and that the
Effective  Time specified in the Agreement of Merger will be May 10, 1996, or as
soon thereafter as practicable.  See "THE TRANSACTIONS -- Certain Legal Matters"
and "THE INVESTMENT AGREEMENT -- Conditions to the Parties'  Consummation of the
Merger."

    Effect of the  Merger.  At the  Effective  Time by virtue of the  Merger and
without any further action on the part of GTI and Fluor,  the sole  stockholders
of Merger Subsidiary and FDESI, respectively:

       (i) The Surviving  Corporation will be obligated to irrevocably authorize
    the  Exchange  Agent to allow the  $33,350,000  Fluor  Deposit to be held on
    behalf of GTI for the benefit of GTI's  stockholders  in accordance with the
    terms of the Payment Agreement;

       (ii) Each share of issued and outstanding  common stock, no par value, of
    Merger  Subsidiary  will be  converted  into and become one  fully-paid  and
    nonassessable  share  of  common  stock,  no par  value,  of  the  Surviving
    Corporation;

       (iii) Each of the 1,000 issued and outstanding shares of common stock, no
    par value, of FDESI (the "FDESI Shares") will be converted into the right to
    receive 4,400 shares of New Common Stock (the "Merger  Consideration"),  and
    the FDESI shares will no longer be  outstanding  and will  automatically  be
    canceled  and retired and will ease to exist,  and Fluor,  the holder of the
    FDESI Shares, will cease to have any rights with respect thereto, except the
    right to receive the Merger Consideration;

       (iv) The Articles of Incorporation  and By-Laws of FDESI at the Effective
    Time will be the  Articles of  Incorporation  and  By-Laws of the  Surviving
    Corporation; and

       (v) The directors and officers of FDESI at the Effective Time will be the
    directors  and officers of the  Surviving  Corporation  until the earlier of
    their  resignation or removal or until their  successors are duly elected or
    appointed and qualified.

    The Surviving Corporation will possess all of the rights, privileges, powers
and be subject to the restrictions, disabilities and duties of each of FDESI and
Merger Subsidiary.

                                       30
<PAGE>

TREATMENT OF STOCK OPTIONS

    Pursuant  to the  terms of the  Investment  Agreement,  promptly  after  the
Closing Date each  outstanding  option under the Company's  Amended and Restated
1987 Stock Plan (the "1987 Stock Plan") and 1995 Director Stock Option Plan (the
"1995 Director Plan") shall be canceled and the holder thereof shall receive, in
exchange  therefor,  a substitute  option (an  "Adjusted  Option") to purchase a
number of shares of New  Common  Stock  equal to the  number of shares of Common
Stock subject to such canceled option multiplied by the Adjustment Fraction at a
per share  exercise price equal to the per share exercise price of such canceled
option divided by the Adjustment Fraction.  Any Adjusted Option shall be subject
to the same terms and  conditions  (other  than  number of shares  and  exercise
price) as the option for which it is exchanged,  including the terms relating to
vesting (treating such Adjusted Options as if they were granted at the same time
as the options for which they were  exchanged)  and the  conditions  relating to
exercise.

    For purposes of the  Investment  Agreement,  "Adjustment  Fraction"  means a
fraction,  the numerator of which equals the Current  Market Price of a share of
Common Stock and the  denominator  of which equals the Current Market Price of a
share of New Common Stock. The "Current Market Price" of a share of Common Stock
or a share of New Common Stock means the average per share closing price for the
five trading days  immediately  preceding  the Closing  Date, in the case of the
Common Stock , and the five trading days immediately following the Closing Date,
in the case of the New Common Stock, as reported on the NNM.

AGREEMENT OF GTI NOT TO SOLICIT OTHER OFFERS

    Pursuant  to  Section  5.4  of  the  Investment  Agreement  (the  "'No-Shop'
Provisions"),  GTI has agreed that from  December  11, 1995 until the earlier of
the  Closing  or the  termination  of the  Investment  Agreement,  GTI  and  its
subsidiaries will not take, (nor authorize or permit their officers,  directors,
employees representatives,  investment bankers, attorneys,  accountants or other
agents to take), any action to (i) encourage, solicit or initiate the submission
of any Acquisition  Proposal (as defined  below),  (ii) enter into any agreement
with respect to or propose any Acquisition  Proposal or (iii) participate in any
way in any discussions or negotiations  with, or furnish any information to, any
person  or entity  (other  than  Fluor or its  officers,  directors,  employees,
representatives,  investment bankers, attorneys,  accountants or other agents or
affiliates of Fluor) in connection  with, or take any other action to facilitate
any inquiries or the making of any proposal that constitutes,  or may reasonably
be expected to lead to, any Acquisition  Proposal;  provided,  however, that (x)
GTI may participate in discussions or negotiations  (including as a part thereof
making any  counter  proposal)  with or furnish  information  to any third party
pursuant to a customary  confidentiality  agreement (so long as GTI has complied
with the  prohibitions  of  clause  (i)  above) if (A) a  majority  of the Board
determines in good faith,  after receipt of written  advice of outside  counsel,
that the failure to provide such  information or participate in such discussions
or negotiations  would be more likely than not to cause the members of the Board
to be in breach of their fiduciary  duties under Delaware Law and (B) a majority
of the Board,  after  consultation  with GTI's independent  financial  advisors,
determines in good faith that there is a reasonable  possibility that such third
party will submit to GTI an Acquisition  Proposal  which is a Superior  Proposal
(as defined  below);  (y) if a majority of the Board  determines  in good faith,
after  receipt  of  written  advice of  outside  counsel,  that the  failure  to
recommend to GTI's  stockholders  an  Acquisition  Proposal  which is a Superior
Proposal would cause the members of the Board to be in breach of their fiduciary
duties  under  Delaware  Law,  GTI  may  withdraw  its   recommendation  of  the
Transactions to the  stockholders  and recommend to GTI's  stockholders  such an
Acquisition Proposal which is a Superior Proposal;  and (z) after termination of
the Investment  Agreement,  GTI may enter into an agreement with any third party
with respect to any Acquisition Proposal which is a Superior Proposal; provided,
further, however, that GTI will not take any action described in clause (x), (y)
or (z)  above  except  after  prompt  notice  to  Fluor  of its  receipt  of any
Acquisition Proposal or of any inquiry or request for information  contemplating
an Acquisition Proposal.

    For purposes of the Investment Agreement,  "Acquisition  Proposal" means any
bona fide proposal made by a third party to acquire (A) beneficial ownership (as
defined under Rule 13(d) of the Exchange Act) of a majority  equity  interest in
GTI pursuant to a merger,  consolidation or other business 

                                       31
<PAGE>

combination,  sale of shares of capital stock, tender offer or exchange offer or
similar transactions involving GTI including,  without limitation, any single or
multi-step  transaction or series of related transactions which is structured in
good faith to permit  such  third  party to acquire  beneficial  ownership  of a
majority or greater equity  interest in GTI or (B) all or  substantially  all of
the business or assets of GTI (other than the  transactions  contemplated by the
Investment Agreement and the Option Agreement).

    For purposes of the Investment  Agreement the term "Superior Proposal" means
any bona fide Acquisition  Proposal which a majority of the members of the Board
of  Directors  determines  in their good faith  judgment  (based on the  written
advice of  independent  financial  advisors) to be more favorable to the Company
and its  stockholders  than the  Transactions,  taken as a whole,  and for which
financing is then  committed or which,  in the good faith judgment of a majority
of the Board (based on the written advice of independent  financial advisors) is
capable of being financed by such third party.

    GTI is obligated to promptly  notify Fluor of its receipt of any Acquisition
Proposal  or  of  any  inquiry  or  request  for  information  contemplating  an
Acquisition  Proposal.  GTI will keep Fluor informed, on a current basis, of the
status of any such proposal,  negotiations  or discussions  except to the extent
that a  majority  of the Board of  Directors  determines  in good  faith,  after
receipt  of  written  advice of  outside  counsel,  that the  provision  of such
information  to Fluor  would be more likely than not to cause the members of the
Board to be in breach of their fiduciary duties under Delaware Law.

CERTAIN RESTRICTIONS ON FLUOR AND THE COMPANY FOLLOWING THE CLOSING

    The Investment Agreement sets forth restrictions on Fluor in connection with
certain  transactions  between Fluor and the Company, and in connection with the
acquisition,  disposition and voting of its shares of New Common Stock following
the Closing.

    Material  Contracts.  From the Closing  Date until April 30,  1999,  neither
Fluor nor its affiliates will be permitted to enter into any contract, agreement
or transaction with the Company or any of its affiliates that is material to the
Company's  business as a whole  without the prior  approval of a majority of the
Independent Directors (as defined below), other than any contract,  agreement or
transaction (a) contemplated by the Marketing Agreement or the Option Agreement,
(b) entered into  between the parties in the ordinary  course of business or (c)
governed by the other  restrictive  provisions  described  below in this section
"Certain Restrictions on Fluor and the Company Following the Closing."

    Acquisition  of  Securities.  Until April 30,  1999,  neither  Fluor not its
affiliates  will be permitted  to purchase or  otherwise  acquire any New Common
Stock, securities of the Company convertible into or exchangeable for New Common
Stock or options,  rights, warrants and similar securities issued by the Company
to acquire New Common  Stock,  without  the prior  approval of a majority of the
Independent  Directors,  unless  immediately after such purchase or acquisition,
the  percentage  of then  outstanding  New  Common  Stock that would be owned of
record or beneficially by Fluor and its affiliates ("Fluor's  Percentage") would
not exceed 65%.

    The foregoing  restrictions  on purchases  will not apply to the exercise by
Fluor of the Option,  but if the Option is exercised by Fluor, the Option Shares
held by Fluor will be counted in any  determination  of Fluor's  Percentage with
respect  to any  purchases  by Fluor or its  affiliates  after  the date of such
exercise.

    Transfer of Securities. Until April 30, 1999, Fluor will not be permitted to
sell, transfer,  mortgage or otherwise dispose of any shares of New Common Stock
held  by it  without  the  prior  approval  of a  majority  of  the  Independent
Directors. The prior approval of the Independent Directors will not be required,
however,  if there  occurs a  substantial  and  extreme  adverse  change  in the
business,  prospects,  or condition (financial or otherwise) of the Company that
arises from  corresponding  substantial  adverse  changes of expected  long term
duration in the market for environmental services.

    Board of Directors;  Voting. Until April 30, 1999, Fluor will be required to
vote all shares of New Common  Stock  owned by it in favor of fixing the size of
the Board of Directors of the Company at not more than seven and in favor of not
less than three Independent Directors. Until the annual 

                                       32
<PAGE>

stockholders'  meeting of the Company (or written  consent in lieu thereof) held
in 1998, Fluor is required to vote all shares of New Common Stock owned by it in
favor of Allan S. Bufferd and Robert P. Schechter (whom Fluor will also cause to
be nominated) in any election of members of the Company's Board of Directors.

    In addition, after the Closing Date and until April 30, 1999, the Company is
prohibited from taking the actions described below.

    Repurchase of New Common Stock.  Without the prior approval of a majority of
the  Independent  Directors,  the Company  will not be permitted to purchase any
shares of New Common Stock unless  immediately  after such  repurchase,  Fluor's
Percentage would not exceed 65%.

    Amendment  of  Agreements.  Without the prior  approval of a majority of the
Independent  Directors,  the  Company  will not be  permitted  to enter into any
amendment or terminate or waive any provision of the Investment  Agreement,  the
Option Agreement or the Marketing Agreement.

    Definition  of  "Independent  Director."  For  purposes  of  the  Investment
Agreement, an "Independent Director" is defined as a director of the Company who
is not (apart  from such  directorship)  (i) an  officer,  affiliate,  employee,
principal stockholder,  consultant or partner of Fluor or any affiliate of Fluor
or of any entity that was  dependent  upon Fluor or any  affiliate  of Fluor for
more than 3% of its revenues or earnings in its most recent fiscal year, (ii) an
officer,  employee,  principal stockholder,  consultant or partner of any entity
that was  dependent  upon the Company or any  affiliate  of the Company for more
than 3% of its  revenues  or earnings  in its most  recent  fiscal year  (unless
agreed  to in  writing  by  Fluor)  or (iii)  an  officer,  director,  employee,
principal stockholder, consultant or partner of a person that is a competitor of
Fluor or any of its affiliates  (unless agreed to in writing by Fluor) or of the
Company or any of its affiliates.

ADDITIONAL COVENANTS OF THE PARTIES

    Covenants  Respecting  Operation  of  Business.  Pursuant to the  Investment
Agreement,  GTI has agreed for itself and its subsidiaries,  and Fluor and FDESI
have agreed with respect to the business of FDESI,  that prior to the  Effective
Time,  that  GTI  and  FDESI,  respectively,  will  carry  on  their  respective
businesses in the usual, regular and ordinary course and will use all reasonable
efforts to preserve intact their business  organizations,  to keep available the
services  of  their  present   officers  and   employees   and  preserve   their
relationships with customers, suppliers, licensors, licensees,  distributors and
others having  business  dealings  with them to the end that their  goodwill and
ongoing businesses shall, in all material respects, be unimpaired at the Closing
Date.

    In connection with the above covenant, GTI, for itself and its subsidiaries,
and Fluor and FDESI,  with respect to the business of FDESI,  have  specifically
agreed that from the date of the  Investment  Agreement  until the Closing Date,
except as previously disclosed, they will not take or authorize, commit or agree
to take, any of the following actions,  without the prior written consent of the
other:  (i) declare,  set aside,  pay dividends on or make any  distributions in
respect of its capital  stock;  (ii)  split,  combine or  reclassify  any of its
capital stock,  or issue or authorize any other  securities in respect  thereof;
(iii) purchase,  redeem or otherwise  acquire any shares of its capital stock or
the capital stock of a subsidiary or any rights, warrants, or options to acquire
any such shares;  (iv) issue,  deliver,  sell, pledge or otherwise  encumber any
shares of its capital stock or any  securities  convertible  into or any rights,
warrants or options to acquire any such shares or convertible  securities (other
than,  with  respect  to GTI,  issuance  of Common  Stock (a) upon  exercise  of
Employee Stock Options and Director Stock Options outstanding on the date of the
Investment  Agreement and (b) pursuant to the Option  Agreement);  (v) amend its
Certificate of Incorporation, By-Laws or comparable organizational documents, or
reincorporate in any  jurisdiction;  (vi) acquire or agree to acquire by merger,
consolidation, purchase of assets or any other manner any business, corporation,
partnership,  joint venture,  association or other business  organization  other
than in the  ordinary  course of  business,  consistent  with past  practice and
involving  no more than  $250,000 in the  aggregate;  (vii)  acquire or agree to
acquire any assets  with  respect to GTI,  material to GTI and its  subsidiaries
taken as a whole,  other than  purchases of inventory in the ordinary  course of
business  consistent  with past practice  and,  with respect to FDESI,  material
individually  or in the  aggregate  to FDESI;  (viii) sell,  lease,  mortgage or

                                       33
<PAGE>

otherwise  encumber  or subject to any lien or  otherwise  dispose of any of its
properties or assets,  except sale of properties or assets no longer used in the
conduct of business and sales of  inventory  in the ordinary  course of business
consistent with past practice;  (ix) incur any  Indebtedness  (as defined in the
Investment  Agreement) for borrowed money or guarantee any such  Indebtedness of
another person, issue or to sell any debt securities or warrants or other rights
to  acquire  any debt  securities  of the  Company  or any of its  subsidiaries,
guarantee any debt securities of another  person,  enter into any "keep well" or
other agreement to maintain any financial  statement condition of another person
or to enter  into any  arrangement  having  the  economic  effect  of any of the
foregoing,  except for  short-term  borrowing not in excess of $1,000,000 in the
aggregate  incurred  in the  ordinary  course of business  consistent  with past
practice,  the  endorsement  of checks in the normal  course of business and the
extension  of  credit in the  normal  course of  business;  (x) make any  loans,
advances or capital contributions to, or investments in, any other person, other
than to the  Company  or any  subsidiary;  (xi)  make or  agree  to make any new
capital  expenditures or  commitments,  purchases of property of acquisitions of
other businesses, capital assets or properties which, individually, is in excess
of  $250,000,  with  respect to GTI and $50,000 with respect to FDESI or, in the
aggregate,  are in excess of  $1,000,000  with respect to GTI and $250,000  with
respect  to FDESI,  or enter  into any new real  property  lease  with an annual
rental which,  with respect to GTI, is in excess of $60,000;  (xii) make any tax
election  (other than in the  ordinary  course of  preparing  and filing its tax
returns)  or settle or  compromise  any  material  tax  liability;  (xiii)  pay,
discharge or satisfy any claims, liabilities or obligations (absolute,  accrued,
asserted  or  unasserted,  contingent  or  otherwise)  other  than the  payment,
discharge or  satisfaction,  in the ordinary course of business  consistent with
past practice or in accordance  with their terms,  of  liabilities  reflected or
reserved against in, or contemplated by, the most recent consolidated  financial
statements  (or the notes  thereto) of GTI included in reports filed pursuant to
the 1934 Act, and of FDESI,  provided to the Company or incurred  after the date
of such financial  statements in the ordinary course of business consistent with
past practice,  or waive the benefits of, or agree to modify in any manner,  any
confidentiality  or  similar  agreement  to  which  the  Company  or  any of its
subsidiaries is a party;  (xiv) adopt any shareholder  rights or similar plan or
take any other  action with the  intention  of, or which may have the effect of,
discriminating against Fluor as a stockholder of GTI, or of GTI as a stockholder
of FDESI; (xv) adopt or amend in any material respect any employee benefit plan;
(xvi) enter into any  contract,  agreement,  plan or  arrangement  covering  any
director,  officer or employee  providing  for the making of any  payments,  the
acceleration  of  vesting  of any  benefit  or  right or any  other  entitlement
contingent upon (a) the  consummation  the Transactions or, with respect to GTI,
any  acquisition  by Fluor of  securities  of the Company  and,  with respect to
FDESI,  any  acquisition by GTI of securities of FDESI or (b) the termination of
employment  after  the  occurrence  of any  such  contingency  if  such  payment
acceleration  of  entitlement   would  not  have  been  provided  but  for  such
contingency;  or  (xvii)  amend  any  existing  contract,   agreement,  plan  or
arrangement to so provide for any of the foregoing.

    Certain Covenants With Respect to FDESI. The Investment  Agreement  provides
that,  on or before the  Closing  Date,  Fluor will  cancel all FDESI  debt.  In
addition,  after the Closing  Date,  Fluor will pay to and indemnify the Company
for any liability for or arising out of any taxes of Fluor or taxes attributable
to Fluor for which FDESI may be liable on any basis with respect to the business
of  FDESI  prior  to the  Closing  Date.  FDESI  will  reimburse  Fluor  for the
liabilities  attributable  to FDESI on all tax returns  which  include FDESI and
Fluor.  In  addition,  Fluor will  indemnify  the Company  and its  subsidiaries
(including  FDESI) from and against any and all loss,  cost and expense  arising
from or as a result of a breach of Fluor or FDESI of their  representations  and
warranties relating to FDESI contracts from and after the Closing Date.

    Other  Covenants  of  GTI,  Fluor  and  FDESI.   GTI,  for  itself  and  its
subsidiaries, Fluor and FDESI have agreed (i) that they will not take any action
that  would,  or that could  reasonably  be  expected  to,  result in any of the
representations  and  warranties  set  forth  by such  party  in the  Investment
Agreement or the Option Agreement  becoming untrue,  or any of the conditions to
the Merger set forth in the Investment Agreement,  not being satisfied;  (ii) to
promptly  notify the other of, (x) any  notice of other  communication  from any
person  alleging  that the  consent  of such  person  is or may be  required  in
connection with the transactions  contemplated by the Investment Agreement,  (y)
any notice or other  communication from any governmental or regulatory agency or
authority in connection  with the  transactions  contemplated  by the Investment
Agreement,  and (z) any actions,  suits,  claims,  investiga-

                                       34
<PAGE>

tions or  proceedings  commenced  or,  to the best of its  knowledge  threatened
against,  relating to or involving or otherwise  affecting such party which,  if
pending on the date of the Investment Agreement,  would have been required to be
disclosed  pursuant  to  the  Investment   Agreement  or  which  relate  to  the
consummation of the transactions  contemplated by the Investment Agreement;  and
(iii) that from December 11, 1995 to the Effective  Time, it will give the other
party,  its  counsel,   financial   advisors,   auditors  and  other  authorized
representatives  reasonable  access during normal business hours to the offices,
properties,  books  and  records  of such  party and will  furnish  to them such
financial  and  operating  data and such other  information  as such persons may
reasonably request.

    Agreements  of GTI with  respect to  Stockholder  Approval.  The  Investment
Agreement  provides  that GTI and/or its Board of  Directors  will take  certain
actions with respect to the preparation of this Proxy  Statement/Prospectus  and
the convening of the Special Meeting, including (i) the unanimous recommendation
of GTI's directors,  subject to certain fiduciary duties as set forth in the "No
Shop" Provisions,  that GTI's  stockholders  approve and adopt the Transactions,
(ii) the prompt  preparation,  filing and clearance  with the Commission of this
Proxy Statement/Prospectus and the prompt mailing thereafter to GTI stockholders
entitled to vote on the Transactions, (iii) the use of all reasonable efforts to
obtain the necessary  approvals of GTI stockholders of the Transactions and (iv)
the compliance with all legal requirements applicable to the Special Meeting.

REPRESENTATIONS AND WARRANTIES

    The Investment Agreement contains certain  representations and warranties of
the parties with respect to the  execution of the  Investment  Agreement and the
Closing.

    Representations  of Fluor and FDESI.  Fluor has made  representations  as to
itself and FDESI regarding, among other things,  organization and qualification,
corporate authority, required governmental consents,  non-contravention of other
agreements of Fluor and FDESI. Fluor has also made representations regarding the
capitalization and business of FDESI, including  representations regarding FDESI
joint ventures, financial statements,  litigation, taxes, environmental matters,
existing contracts,  employees and employee benefit plans, compliance with laws,
intellectual property, properties, confidentiality agreements and the absence of
certain changes in its business operations and financial condition.

    Representations  of GTI.  The  Company has made  representations  regarding,
among other things,  its organization and  qualification,  corporate  authority,
required   governmental   consents,   non-contravention   of  other  agreements,
capitalization,  joint ventures and  subsidiaries,  filings with the Commission,
financial statements,  litigation, employee benefit plans, compliance with laws,
intellectual   property,   contracts,    properties,    environmental   matters,
confidentiality  agreements,  and the absence of certain changes in its business
operations and financial condition.

CONDITIONS TO CONSUMMATION OF THE MERGER

    The obligations of GTI, Fluor, FDESI and Merger Subsidiary to consummate the
Merger are subject to the  satisfaction  of the  following  conditions:  (i) the
transactions contemplated by the Investment Agreement,  including the amendments
to the Company's Restated Certificate of Incorporation and the Recapitalization,
shall  have  been  approved  by  GTI's  stockholders;  (ii)  the  expiration  or
termination of any  applicable  waiting period under the HSR Act relating to the
Transactions; (iii) the absence of any applicable law or regulation or judgment,
injunction,  order or decree  prohibiting the  consummation of the Merger or the
effectiveness as between the parties of the Marketing Agreement; (iv) obtaining,
taking and making of all  consents or actions or filings  with any  governmental
body, agency,  official, or authority required to permit the consummation of the
Merger and the  effectiveness as between the parties of the Marketing  Agreement
(other than those consents,  actions or filings which, if not obtained, taken or
made  prior to the  consummation  of the  Merger,  as would not have a  material
adverse effect on the Company,  and (v) the absence of any banking moratorium or
suspension of payments in respect of banks in the United States.

                                       35
<PAGE>

    The  obligations  of Fluor and FDESI to consummate the Merger are subject to
the satisfaction of the following further conditions:  (i)(a) the performance by
GTI, in all  material  respects,  of all its  obligations  under the  Investment
Agreement  required to be performed  by it at or prior to the  Closing;  (b) the
representations  and  warranties  of GTI contained in the  Investment  Agreement
being true in all material respects as of the Closing (except to the extent such
representations  and warranties  are expressly made as of an earlier date);  and
(c) the  receipt  by Fluor of a  certificate  signed by an officer of GTI to the
foregoing  effect;  (ii) from July 31, 1995 to the Closing Date,  the absence of
any material  adverse change in the condition of the Company;  (iii) the absence
of  any  pending  or  threatened  action  or  proceeding  before  any  court  or
governmental  or regulatory  authority or body that seeks, or threatens to seek,
to prevent or delay the  consummation of the Transactions or that challenges any
of the terms or provisions of the Investment Agreement;  (iv) the absence of any
order,  judgment or decree  issued by any court or  governmental  or  regulatory
authority or body and of any statute,  rule,  regulation or executive order that
(a) prevents the  consummation of the  Transactions,  (b) prohibits Fluor at any
time after the Closing  from  exercising  all  materials  rights and  privileges
pertaining  to its  ownership  of New  Common  Stock  acquired  in the Merger or
purchasable upon exercise of the Option, or (c) materially and adversely affects
the condition (financial or otherwise),  properties,  assets, earnings, business
or operations of the Company or a subsidiary;  (v) the execution and delivery by
GTI of the  Marketing  Agreement;  (vi) the filing of the Amended  and  Restated
Certificate of  Incorporation  with the Delaware  Secretary of State;  (vii) the
making by GTI of the Company  Deposit with the Exchange Agent and the furnishing
of reasonably  satisfactory evidence to Fluor thereof; and (viii) the furnishing
by GTI to Fluor of (a) a certified copy of the  resolution or  resolutions  duly
adopted by the Board of Directors of GTI  respecting  the  Transactions  and the
submission  thereof to the vote of GTI's  stockholders,  (b) a certified copy of
the resolution or  resolutions  duly adopted by the holders of a majority of the
outstanding shares of Common Stock of the Company approving the Transactions and
(c) a favorable opinion of counsel for the Company, dated the Closing Date, with
respect to certain matters.

    The  obligations  of GTI and Merger  Subsidiary to consummate the Merger are
subject to the  satisfaction  of the following  further  conditions:  (i)(a) the
performance  by each of  Fluor  and  FDESI,  in all  material  respects,  of all
obligations under the Investment  Agreement required to be performed by it at or
prior to the Closing;  (b) the representations and warranties of Fluor and FDESI
contained in the Investment  Agreement being true in all material respects as of
the  Closing  (except to the extent  such  representations  and  warranties  are
expressly  made  as of an  earlier  date)  and  (c)  the  receipt  by  GTI  of a
certificate  signed by an officer  of Fluor to the  foregoing  effect;  (ii) the
submission of the Agreement of Merger to the  California  Secretary of State for
filing in  accordance  with the  California  Code;  (iii) the making by Fluor or
FDESI of the  FDESI  Deposit  with the  Exchange  Agent  and the  furnishing  of
reasonably  satisfactory  evidence  to the Company  thereof and of the  Transfer
Authorization;  (iv) the  furnishing by Fluor to GTI of (a) a certified  copy of
the  resolution or  resolutions  duly adopted by the Board of Directors of Fluor
respecting the  Transactions (b) a certified copy of a resolution or resolutions
duly adopted by the Board of Directors and sole  stockholder of FDESI  approving
the  Investment  Agreement,  and (c) a  favorable  opinion of counsel for Fluor,
dated the Closing  Date with  respect to certain  matters;  (v) from October 31,
1995 to the Closing  Date,  the absence of any  material  adverse  change in the
condition  of FDESI;  (vi) the  absence of any pending or  threatened  action or
proceeding  before any court or  governmental  or regulatory  authority or body,
that seeks or threatens  to seek,  to prevent or delay the  consummation  of the
Transactions or that challenges any of the terms or provisions of the Investment
Agreement;  (vii) the  absence of any order,  judgment  or decree  issued by any
court  or  governmental  or  regulatory  authority  and  of any  statute,  rule,
regulation  or  executive  order  that  (a)  prevents  the  consummation  of the
Transactions  (b)  prohibits  the  Company  at any time after the  Closing  from
exercising all material rights and privileges pertaining to its ownership of the
stock of the Surviving Corporation,  or (c) materially and adversely affects the
condition (financial or otherwise),  properties,  assets, earnings,  business or
operations  of FDESI;  and (viii) the  execution  and  delivery  by Fluor of the
Marketing  Agreement,  which shall be set in full force and effect to the extent
set forth therein.

    The  Investment  Agreement  provides that at any time prior to the Effective
Time, the parties may waive  compliance with any of the agreements or conditions
contained in the Investment  Agreement  which may be legally  waived.  As of the
date of this Proxy Statement/Prospectus, GTI, Fluor, FDESI and Merger Subsidiary
have no  present  intention  of  waiving  any  conditions  under the  Investment
Agreement.

                                       36
<PAGE>

TERMINATION

    Section  9.1  of the  Investment  Agreement  provides  that  the  Investment
Agreement may be terminated and the Merger may be abandoned at any time prior to
the Closing (notwithstanding approval of the Transactions by GTI's stockholders)
(i) by mutual  written  consent of GTI and Fluor;  (ii) by GTI or Fluor,  if the
Closing has not been held by May 31,  1996;  (iii) by GTI or Fluor,  if there is
any law or regulation that makes consummation of the Merger illegal or otherwise
prohibited or if any judgment,  injunction,  order or decree  enjoining Fluor or
GTI from consummating the Merger is entered and such judgment, injunction, order
or decree  becomes final and  nonappealable  (provided that the party seeking to
terminate the  Investment  Agreement  must have used all  reasonable  efforts to
remove such judgment,  injunction,  order or decree); (iv) by GTI (so long as it
complies with the "No-Shop" Provisions) or by Fluor if the Board of Directors of
GTI has withdrawn or materially  modified its approval or  recommendation of the
Transactions or has recommended an Acquisition Proposal;  (v) by Fluor, if it is
not in material breach of its obligations  under the Investment  Agreement and a
person or group (other than Fluor or any  affiliate) (a) has made an Acquisition
Proposal and GTI has commenced discussions with that party or (b) has become the
beneficial owner of at least 20% of GTI's  outstanding  Common Stock; or (vi) by
GTI or Fluor,  if the Special  Meeting (a) has been held and GTI's  stockholders
have  failed to approve  and adopt the  Transactions  at such  meeting or (b) by
Fluor, if such meeting is not held by May 31, 1996; and (vii) by GTI or Fluor if
there  has been a breach  by the other  party of any  representation,  warranty,
covenant or agreement  contained in the Investment  Agreement which is incurable
or has not been cured by May 31, 1996.

TERMINATION FEE

    The Investment  Agreement provides that, so long as Fluor has not materially
breached its obligations  under the Investment  Agreement,  GTI will pay Fluor a
Termination Fee (as defined below) under certain circumstances.  The Termination
Fee is payable promptly, but in no event later than two business days, after the
termination  of the  Investment  Agreement  because the Board has  withdrawn  or
materially  modified its approval or  recommendation  of the Transactions to the
Company's  stockholders or recommended an Acquisition Proposal.  The Termination
Fee is also  payable  simultaneously  with the  consummation  of an  Acquisition
Proposal effected after the termination of the Investment  Agreement because (a)
a  person  or  group  (other  than  Fluor  or any  affiliate)  (i)  has  made an
Acquisition  Proposal and GTI has commenced  discussions with that party or (ii)
has become the  beneficial  owner of at least 20% of the  outstanding  shares of
Common Stock, or (b) if the Special Meeting has been held and GTI's stockholders
have failed to approve and adopt the  Transactions at such meeting provided that
(A)  prior  to or  within  60  days  after  the  termination  of the  Investment
Agreement,  an Acquisition Proposal was been received and (B) if the Acquisition
Proposal  involves a merger,  sale of  assets,  purchase  of shares  from GTI or
similar  business  combination,  the agreement with respect  thereto was entered
into  within  twelve  months  of the  date  of  termination  of  the  Investment
Agreement,  or if the Acquisition  Proposal involves a tender or exchange offer,
the tender or exchange offer was commenced within such  twelve-month  period. In
addition, the Termination Fee is payable simultaneously with the consummation of
an  Acquisition  Proposal  effected  after  the  termination  of the  Investment
Agreement  due to a breach by GTI of a covenant or  agreement  contained  in the
Investment  Agreement if (i) prior to or within 60 days after the termination of
the Investment  Agreement  negotiations  or discussions  have been held with, or
information  supplied  to, a third party who makes an  Acquisition  Proposal and
(ii) the  agreement  with respect to such or any other  Acquisition  Proposal is
entered into, or if the Acquisition Proposal is a tender or exchange offer, such
offer is commenced,  within twelve months after  termination  of the  Investment
Agreement.  For purposes of the Investment  Agreement,  "Termination  Fee" means
$3,000,000  plus up to an  additional  $750,000  as  reimbursement  for fees and
expenses  actually incurred by Fluor and FDESI in connection with the Investment
Agreement and the Transactions.

AMENDMENT; WAIVERS

    Any provision of the Investment  Agreement may be amended or waived prior to
the Closing if such amendment or waiver is in writing and signed, in the case of
an amendment, by GTI and Fluor, or in the case of a waiver, by the party against
whom the waiver is to be effective;  provided that after the  

                                       37
<PAGE>

authorization  and approval of the Transactions by GTI's  stockholders,  no such
amendment or waiver will,  without the further  approval of GTI's  stockholders,
alter or change any term of the Amended or Restated Certificate of Incorporation
or the  amendments to the By-Laws if such  alteration or change would  adversely
affect the holder of any Shares.

    GTI intends to notify  stockholders in the event that any material provision
of the  Investment  Agreement  is  amended  or waived in any  material  respect,
independent  of  whether  such  amendment  or  waiver  occurs  prior to or after
stockholder approval of the Transactions. GTI expects that any such notification
would be given  through  issuance  of a press  release  or,  if  appropriate,  a
supplement to this Proxy Statement/Prospectus.

EXPENSES

    The Investment  Agreement provides that, except for any Termination Fee, all
costs and expenses incurred in connection with the Investment  Agreement and the
Transactions will be paid by the party incurring such costs or expenses.

                          THE MARKETING AGREEMENT

    THE FOLLOWING  DESCRIPTION OF THE MARKETING AGREEMENT DOES NOT PURPORT TO BE
COMPLETE  AND IS  QUALIFIED  IN  ITS  ENTIRETY  BY  REFERENCE  TO THE  MARKETING
AGREEMENT,  THE FORM OF WHICH IS ATTACHED TO THIS PROXY  STATEMENT/PROSPECTUS AS
EXHIBIT C TO ANNEX A AND IS INCORPORATED  HEREIN BY REFERENCE.  ALL STOCKHOLDERS
ARE URGED TO READ THE MARKETING AGREEMENT IN ITS ENTIRETY.

    The Marketing  Agreement sets forth the  understanding of GTI and Fluor with
respect to their  arrangement (a) to work together to approach the environmental
services market,  (b) for Fluor to use the Company's services in connection with
Fluor's  engineering  and  construction  business,  and  (c) to  provide,  on an
intercompany  basis,  support  services  to each other.  Fluor will  continue to
provide its customers with  engineering and  construction  services,  as well as
certain  environmental  services,  such as Department of Energy  Management  and
Operations,  Operating and Management,  Management and Integration  services and
so-called "Total Business Solutions" services. Total Business Solutions services
are  differentiated  from the  environmental  services  that will continue to be
provided  by GTI in that they  involve  an  integration  of such  services  with
substantial  non-environmental services or involve a substantial increase in the
scale and scope of  services  currently  provided by GTI.  GTI will  continue to
provide environmental assessment, remediation and monitoring services.

    The Marketing  Agreement provides that GTI will have primary  responsibility
for the marketing and  execution of  environmental  services and Fluor will have
primary  responsibility  for marketing and execution of Total Business Solutions
services.  Fluor  will  promote  the  use  of  GTI,  and  will  retain  GTI on a
sole-source basis, for environmental  services that are related or incidental to
Fluor's  engineering  and  construction  business and Total  Business  Solutions
business,  provided that use of the Company is  acceptable to the customer,  the
Company has  adequate  available  personnel  and other  resources  to timely and
satisfactorily  perform the work and the Company's proposed commercial terms are
competitive  with the market.  In addition,  GTI and Fluor will provide overhead
support and contract  support  services to each other on an intercompany  basis.
The Company  will use the name "Fluor  Daniel GTI,  Inc." during the term of the
Marketing Agreement, and subsidiaries of the Company may also use a similar name
if the parties  decide it is useful in marketing the operations of the Company's
subsidiaries.

    The term of the  Marketing  Agreement  is ten years from the  Closing of the
Transactions  unless further extended by the parties.  In the event Fluor ceases
to own at least 20% of the issued and  outstanding  equity of the Company,  then
(a) Fluor,  provided it is not in breach of its obligations  pursuant to Section
6.3(d) of the Investment  Agreement  (with respect to dispositions of New Common
Stock  held by it),  or GTI may  terminate  the  Marketing  Agreement  prior  to
expiration of the term; and (b) Fluor, pursuant to Section 7.9 of the Investment
Agreement, may revoke the license of the Company and its subsidiaries to use the
name "Fluor Daniel" in the Company's  corporate name. See "INVESTMENT  AGREEMENT
- -- Certain Restrictions on Fluor and the Company Following the Closing."

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<PAGE>

           THE AMENDED AND RESTATED CERTIFICATE OF INCORPORATION

    Pursuant to the Investment Agreement,  GTI is required to obtain stockholder
approval  and to file an  Amended  and  Restated  Certificate  of  Incorporation
effecting the  Recapitalization  as a condition to Fluor's  consummation  of the
Merger.  THE FOLLOWING  DESCRIPTION  OF THE AMENDED AND RESTATED  CERTIFICATE OF
INCORPORATION  DOES NOT PURPORT TO BE COMPLETE  AND IS QUALIFIED IN ITS ENTIRETY
BY  REFERENCE  TO  THE  TEXT  OF  THE  AMENDED  AND  RESTATED   CERTIFICATE   OF
INCORPORATION WHICH IS ATTACHED TO THIS PROXY  STATEMENT/PROSPECTUS AS EXHIBIT A
TO ANNEX A, AND IS INCORPORATED HEREIN BY REFERENCE. STOCKHOLDERS ARE ENCOURAGED
TO READ THE AMENDED AND RESTATED CERTIFICATE OF INCORPORATION IN ITS ENTIRETY.

    Recapitalization.  Effective upon the specified  effective date set forth in
the Amended and Restated  Certificate of  Incorporation  filed with the Delaware
Secretary of State, GTI's Restated  Certificate of Incorporation will be amended
to amend Article FOURTH ("Article Fourth") to authorize 25,000,000 shares of New
Common Stock and  establish  the terms  thereof and to effect the  conversion of
each  outstanding  Share into the right to receive  $8.62 in cash and .5274 of a
share of New  Common  Stock.  Under  Article  Fourth  the  rights,  preferences,
privileges  and  restrictions  of the New Common  Stock will be identical in all
respects  to those of the  Common  Stock,  except  that the par value of the New
Common Stock will be $.001 per share.

    Other  Amendments.  In addition,  upon the  effective  date set forth in the
Amended  and  Restated  Certificate  of  Incorporation  filed with the  Delaware
Secretary of State, GTI's Restated  Certificate of Incorporation will be amended
to (a) amend Article  FIRST to change the  Company's  name to "Fluor Daniel GTI,
Inc.", (b) amend Article THIRD to maximize the legally  permissible  purposes of
the Company under  Delaware Law and (c) delete  Article  SIXTH,  which  contains
provisions regarding a classified board of directors.

                         AMENDMENTS TO THE BY-LAWS

    The  Investment  Agreement  requires  that,  prior to the Closing,  the Com-
pany's  stockholders  approve certain  amendments to the By-Laws to, among other
things,  amend  Article 2 (Meetings  of  Stockholders),  Article 3  (Directors),
Article 4 (Meetings of the Board of Directors),  Article 7 (Officers), Article 8
(Resignations,  Removals  and  Vacancies)  and  Article 15  (Amendments).  (Such
By-Laws,  as  proposed  to be amended,  are  referred to herein as the  "Amended
By-Laws").  THE FOLLOWING  DESCRIPTION OF THE AMENDMENTS TO THE BY-LAWS DOES NOT
PURPORT TO BE COMPLETE AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO THE TEXT
OF THE AMENDED AND BY-LAWS WHICH IS ATTACHED TO THIS PROXY  STATEMENT/PROSPECTUS
AS EXHIBIT B TO ANNEX A, AND IS INCORPORATED  HEREIN BY REFERENCE.  STOCKHOLDERS
ARE ENCOURAGED TO READ THE AMENDED BY-LAWS IN THEIR ENTIRETY.

    Amendments to Article 2 (Meetings of Stockholders). Amended Article 2 of the
By-Laws  provides that special  meetings of the  stockholders may be called only
upon the written request of a majority of the directors then in office.

    Amendments to Article 3 (Directors).  Amended  Article 3 of the By-Laws sets
the size of the  Board of  Directors  at no more  than  seven  (7)  members  and
eliminates the provision allowing enlargement of the Board by a majority vote of
the Board or by the  affirmative  vote of two-thirds of the  outstanding  shares
entitled to vote in the election of  directors.  Article 3 has also been amended
to eliminate the classified board of directors, such that the term of office for
all directors shall expire at the next annual meeting of stockholders.

    Amendments  to  Article  4  (Meetings  of the Board of  Directors).  Amended
Article  4 of  the  By-Laws  specifies  that  a  quorum  of the  Board  for  the
transaction  of business  shall be a majority of the Board,  except as otherwise
provided  in the  Amended  and  Restated  Certificate  of  Incorporation  or the
By-Laws.

    Amendment  to  Article  7  (Officers).  Amended  Article  7 of  the  By-Laws
specifies that the Board shall have a Chairman of the Board who shall preside at
all meetings of stockholders and of the Board of Directors.

                                       39
<PAGE>

    Amendments  to Article 8  (Resignations,  Removals and  Vacancies).  Amended
Article 8 of the By-Laws provides that any or all directors may be removed, with
or without  cause,  by the holders of a majority of the shares then  entitled to
vote at an election  of  directors,  unless  otherwise  specified  by law or the
Amended  and  Restated  Certificate  of  Incorporation.  Amended  Article 8 also
eliminates  provisions  relating to the classified board structure to conform to
amended Article 3.

    Amendment  to  Article  15  (Amendments).  Amended  Article 15 of the ByLaws
provides  that the By-Laws may be altered,  amended or repealed,  or new By-Laws
adopted,  by the  stockholders  or by a majority of the full Board of  Directors
(whether or not present at a meeting).

    The  By-Laws  are also  amended  throughout  to  reflect  the  change in the
Company's  name to Fluor  Daniel GTI,  Inc.,  and to  reference  the Amended and
Restated  Certificate of Incorporation  rather than the Restated  Certificate of
Incorporation.

                           ELECTION OF DIRECTORS

    Pursuant to the  Investment  Agreement,  the Amended  By-Laws  provide for a
Board of Directors with no more than seven members, which each director to serve
until the next annual meeting of stockholders  and until his or her successor is
elected  and  qualified  or his or  her  earlier  resignation  or  removal.  The
following  are the nominees for the Board of Directors to serve  effective as of
the Closing: Walter C. Barber, Allan S. Bufferd,  Robert P. Schechter,  David L.
Myers, J. Michal Conaway, James C. Stein and Ernie Green.

    In the event any of such nominees  becomes unable or unwilling to serve, the
shares of Common Stock  represented  by the enclosed Proxy will be voted for the
election of the balance of those named and may be voted for such other person(s)
as the Board of Directors  may select.  The Board of Directors  has no reason to
believe that any such nominee will be unable to serve.

    Below is information  setting forth the name, age,  business  background and
other  information  regarding  those nominees who do not currently  serve on the
Company's Board of Directors. None of the New Directors has previously served as
either an officer or  director of GTI,  and each of them is serving  pursuant to
the  terms  of the  Investment  Agreement.  See  "THE  TRANSACTIONS  -- Board of
Directors and  Officers."  Information  regarding  Messrs.  Barber,  Bufferd and
Schechter,  each of whom is currently a director of the Company, can be found in
the Company's  Proxy  Statement for the Annual Meeting of  Stockholders  held on
September 19, 1995 (the "1995 Proxy Statement"), which is incorporated herein by
reference.

 DAVID L. MYERS, age 49

    Mr.  Myers has served as  President,  Environmental  Services of Fluor since
July 1994. From 1984 until July 1994, Mr. Myers served as Fluor's Vice President
of Business  Units and of various  other Fluor  subsidiaries.  Mr.  Myers joined
Fluor Corporation in 1975.

 J. MICHAL CONAWAY, age 47

    Mr.  Conaway has served as Vice  President  and Chief  Financial  Officer of
Fluor  Corporation  since  May 1994.  From  1993 to May 1994,  he served as Vice
President,  Finance,  of  Fluor  Corporation.  From  1988  until  joining  Fluor
Corporation,  Mr.  Conaway was a Vice President and Chief  Financial  Officer of
National Gypsum Company and its parent, Aancor Holdings, Inc.

 JAMES C. STEIN, age 52

    Mr. Stein has served as Group President, Diversified Services of Fluor since
May 1994. He served as Fluor's President, Business Units, from 1993 to May 1994,
and as  President,  Industrial  Sector,  of Fluor from 1986 to 1994.  Mr.  Stein
joined Fluor Corporation in 1964.

 ERNIE GREEN, age 57

    Mr. Green is founder,  President and Chief Executive Officer of EGI, Inc., a
manufacturer of automotive  components  founded in 1981. He is also President of
Florida  Engineering,  Inc.,  a  subsidiary  of EGI.  Mr. Green is a director of
Acordia,  Inc., Bank One, Dayton,  N.A., DPL, Inc.,  Duriron Company,  Inc., and
Eaton Corporation.

    Director  Compensation.  It is currently anticipated that only directors who
are not  employees  of either the Company or Fluor  ("Non-Employee  Directors"),
will receive compensation from the Company for service on the Board.  Currently,
Non-Employee Directors are paid $10,000 without regard to attendance at 

                                       40
<PAGE>

meetings of the Board of Directors or Committees,  and the Chairmen of the Audit
and  Compensation  Committees  are  paid  an  additional  $5,000.   Non-Employee
Directors will also receive options under the 1995 Director Plan,  which is more
fully  described in the Company's 1995 Proxy  Statement.  The 1995 Director Plan
will be amended so that any  employee of an  affiliate  of the  Company  (which,
after the Transactions, will include Fluor) will be ineligible for option grants
under that plan. See "AMENDMENTS TO STOCK PLANS."

    Employment  Agreements.  In  December  1995,  GTI  entered  into  Employment
Agreements with its executive  officers,  including  Walter C. Barber,  who also
serves as a director of the  Company.  See "THE  TRANSACTIONS  --  Conflicts  of
Interest."

                         AMENDMENTS TO STOCK PLANS

    Recapitalization Amendments.  Pursuant to the Investment Agreement, promptly
after the  Closing  all  options  under the  Company's  1987 Stock Plan and 1995
Director  Plan  outstanding  on the Closing Date will be exchanged  for Adjusted
Options. See "THE INVESTMENT AGREEMENT -- Treatment of Stock Options." Effective
as of the Closing Date, the Company's  1987 Stock Plan,  1995 Director Plan will
be amended in order to implement  the  disposition  of such options set forth in
the Investment  Agreement.  In addition,  the Amended and Restated 1986 Employee
Stock  Purchase  Plan (the  "1986  Purchase  Plan")  will be  amended so that an
adjustment  under its existing terms which would operate to reduce the number of
shares  purchasable  under, and the aggregate number of shares issuable pursuant
to that plan will not be made in the Recapitalization.

    Under the current  terms of  paragraph  13(A) and Article  12(A) of the 1987
Plan and 1986  Purchase  Plan,  respectively,  grantees  of the options or other
rights under these plans would be entitled to purchase  that number of shares of
New Common Stock as were  exchangeable  for the number of shares of Common Stock
which  a  grantee  would  have  been  entitled  to  purchase,   except  for  the
Recapitalization.  Under current paragraph 10(b) of the 1995 Director Plan, upon
the  Recapitalization  adjustments  to the number and kind of shares  authorized
under the plan,  and the  number  and kind of shares  covered  by and the option
price  of  outstanding  options  under  the  plan  "necessary  to  maintain  the
proportionate interest of the options and preserve, without exceeding, the value
of such options", would be made.

    Because the terms of the Transactions are not clearly addressed by the above
provisions, and because the above provisions do not contemplate the treatment of
stock options set forth in the  Investment  Agreement,  the Board has determined
advisable amendments to the 1987 Stock Plan, the 1986 Purchase Plan and the 1995
Director Plan in order to implement the terms of the Investment Agreement.

    Specifically,  paragraph  13(G) of the 1987 Stock Plan and Section  10(B) of
the 1995 Director  Plan shall be amended so that each option  granted under each
such plan and  outstanding  on the Closing Date shall be exchanged for an option
to purchase a number of shares of New Common Stock equal to the number of shares
of Common Stock subject to such outstanding  option multiplied by the Adjustment
Fraction (as defined above) at a per share exercise price equal to the per share
exercise price of such outstanding option divided by the Adjustment Fraction. No
option to purchase  fractional  shares of New Common  Stock will be issued,  and
each new option will be adjusted  upward to the nearest full share of New Common
Stock.

    Under the current terms of the 1987 Stock Plan and the 1995  Director  Plan,
the plans will  automatically  be adjusted to reflect the change of the class of
shares  issuable  from  Common  Stock to New  Common  Stock  and to  effect  the
increase,  if any, in the aggregate number of shares authorized under such plans
necessary due to the issuance of Adjusted  Options.  The 1986 Purchase Plan will
be amended so that the  recapitalization  adjustment  in Article  12(A) will not
apply in connection with the Recapitalization.

    Additional  Amendment  to 1995  Director  Plan.  Pursuant to the  Investment
Agreement,  three  members of Fluor  management  will be added to the  Company's
Board, and, under the current terms of the 1995 Director Plan, would be eligible
for stock  options.  The  Board has  determined  that the  grant of  options  to
employees  of the  Company's  affiliates  (such as  Fluor)  would  not serve the
purposes  of the 1995  Director  Plan,  which is  designed to attract and retain
qualified outside directors. Accordingly, the Board deems advisable an amendment
to  Section  1 of the 1995  Director  Plan to  define  "employees"  (who are not
eligible for option grants under the 1995 Director Plan) to include employees of
affiliates  of the Company.  For purposes of the 1995  Director  Plan,  the term
"affiliate"  will include any entity which  controls,  is  controlled  by, or is
under common control with the Company. See "ELECTION OF DIRECTORS."

                                       41
<PAGE>

          SHARE OWNERSHIP OF GTI MANAGEMENT AND PRINCIPAL HOLDERS

    The following  table sets forth  information as of March 20, 1996 concerning
the ownership of Common Stock by each current  member of the Company's  Board of
Directors,  each  nominee  for  Director  at the  Special  Meeting,  each of the
executive  officers  named in the  Summary  Compensation  Table  included in the
Company's 1995 Proxy Statement,  all current Directors and executive officers as
a group and each stockholder  known by the Company to be the beneficial owner of
more than 5% of its  outstanding  shares of Common  Stock.  Except as  otherwise
noted,  the person or entities  identified have sole voting and investment power
with respect to such shares.

<TABLE> 
<CAPTION>

                                                                          AMOUNT AND NATURE
                                                                            OF BENEFICIAL
                          NAME AND ADDRESS**                                  OWNERSHIP       PERCENT
                          ------------------                                  ---------       -------
<S>                                                                           <C>             <C>
Walter C. Barber                                                                80,863(1)       1.2%
Bayard Henry                                                                   229,666(2)       3.3%
Allan S. Bufferd                                                                 3,638(3)        *
Robert P. Schechter                                                              3,538(4)        *
David L. Myers                                                                       0           *
J. Michal Conaway                                                                    0           *
James C. Stein                                                                       0           *
Ernie Green                                                                          0           *
Robert E. Sliney, Jr.                                                            9,637(5)        *
Wendell W. Lattz                                                                 9,623(6)        *
Frank J. Gorry                                                                   4,473(7)        *
J. Steven Paquette                                                               4,537(8)        *
All Current Directors and Executive Officers as a group (11 persons)           367,350(9)       5.2%
The Parnassus Fund                                                             520,000(10)      7.5%
  244 California Street, Suite 400
  San Francisco, CA 94111
The TCW Group, Inc.                                                            398,700(11)      5.7%
  865 South Figueroa Street
  Los Angeles, CA 90017
</TABLE>

  * Represents beneficial ownership of less than 1% of the Company's outstanding
    shares of Common Stock.

 ** Addresses are given for beneficial owners of more than 5% of the outstanding
    Common Stock only.

(1) Includes  38,900 shares  subject to options  under the Company's  1987 Stock
    Plan  which  are  exercisable  at  February  16,  1996,  or  within  60 days
    thereafter.

(2) Includes 1,666 shares subject to options under the Company's 1995 Director
    Plan  excercisable at February 16, 1996, or within 60 days  thereafter.  Mr.
    Henry is not standing for election at the Special Meeting.

(3) Includes  1,666 shares  subject to options under the Company's 1995 Director
    Plan  exercisable  at February 16, 1996, or within 60 days  thereafter.  The
    Massachusetts  Institute of  Technology  ("M.I.T.")  owns 24,582 shares with
    respect to which Mr.  Bufferd has voting and  investment  power by virtue of
    his  position as Deputy  Treasurer  and Director of  Investments  of M.I.T.,
    subject to the policies and procedures of the Investment Committee of M.I.T.
    Mr. Bufferd disclaims beneficial ownership of such shares.

(4) Includes  1,666 shares  subject to options under the Company's 1995 Director
    Plan exercisable at February 16, 1996, or within 60 days thereafter.

(5) Includes  8,133 shares  subject to options  granted under the Company's 1987
    Stock Plan which are  exercisable  at February 16,  1996,  or within 60 days
    thereafter.

(6) Includes  8,700 shares  subject to options  granted under the Company's 1987
    Stock Plan which are  exercisable  at February 16,  1996,  or within 60 days
    thereafter.

(7) Includes  4,333 shares  subject to options  granted under the Company's 1987
    Stock Plan which are  exercisable  at February 16,  1996,  or within 60 days
    thereafter.

(8) Includes  4,333 shares  subject to options  granted under the Company's 1987
    Stock Plan which are  exercisable  at February 16,  1996,  or within 60 days
    thereafter.

(9) Includes  88,825 shares subject to options  granted under the Company's 1987
    Stock Plan and 1995  Director  Plan which are  exercisable  at February  16,
    1996, or within 60 days thereafter.

(10) Information  with  respect to the  beneficial  ownership of Common Stock as
     reported on Stockholder's Schedule 13G dated February 9, 1996.

(11) Information  with  respect to the  beneficial  ownership of Common Stock as
     reported on such stockholder's Schedule 13G dated February 12, 1996.

                                       42
<PAGE>

                      DESCRIPTION OF NEW COMMON STOCK

    Upon the effective date specified in the Amended and Restated Certificate of
Incorporation  of the  Company  filed  with the  Delaware  Secretary  of  State,
1,000,000  shares of preferred  stock,  par value $.01  ("Preferred  Stock") and
25,000,000  shares of New  Common  Stock,  par value  $.001 per  share,  will be
authorized.  The rights of holders of New Common Stock (which are  substantially
identical to the rights of holders of Common Stock) are as set forth below.

    Voting  Rights.  The  holders  of New  Common  Stock  will,  on all  matters
submitted to a vote of the stockholders of the Company,  each be entitled to one
vote per share,  voting together as a single class unless otherwise  required by
applicable law.

    Dividends;  Reclassifications;  Mergers. Holders of New Common Stock will be
entitled to receive such dividends and other  distributions in cash, property or
shares of capital stock, when and if declared by the Board from time to time out
of assets or funds of the Company  legally  available  therefor,  subject to the
preferential rights, if any, of the Preferred Stock.

    Liquidation.  In the event of any dissolution,  liquidation or winding-up of
the  affairs of the  Company,  after  distribution  in full of the  preferential
amounts,  if any, to be  distributed  to the holders of shares of the  Preferred
Stock,  holders of New Common Stock will be entitled,  unless otherwise provided
herein by law, to receive all of the remaining assets of the Company of whatever
kind available for  distribution  to  stockholders  ratably in proportion to the
number of shares of New Common  Stock held by them  respectively.  The Board may
distribute in kind to the holders of New Common Stock such  remaining  assets to
any other  corporation,  trust or other entity and receive payment  therefore in
cash,  stock or  obligations of such other  corporation,  trust or entity or any
combination so received and distribute any balance thereof in kind to holders of
New Common  Stock.  Neither the merger or  consolidation  of the Company into or
with any other  corporation nor the merger of any other corporation into it, nor
any purchase or redemption of shares of stock of the Company of any class,  will
be deemed to be a dissolution,  liquidation or winding-up or the Corporation for
the purposes of the above provisions.

    Rights  Relative  to  Preferred  Stock.  All  voting  powers,  designations,
preferences or relative  participating,  optional or other special  rights,  and
such  qualifications,  limitations or  restrictions  thereof,  of the New Common
Stock are  expressly  subject  and  subordinate  to those that may be filed with
respect to any  shares of  Preferred  Stock.  No shares of  Preferred  Stock are
currently  outstanding,  nor have any terms of any Preferred  Sock been fixed by
the Company.

                                       43
<PAGE>

                     INFORMATION WITH RESPECT TO FDESI

FDESI BUSINESS

 GENERAL

    FDESI  provides a full range of  environmental  consulting  and  engineering
services,  including  assessment  and  remediation  services,  to commercial and
industrial clients, and to federal, state and local government agencies.

    FDESI is a wholly-owned  subsidiary of Fluor.  Fluor is an indirect,  wholly
owned subsidiary of Fluor Corporation,  a Delaware corporation,  which is one of
the largest  public-owned  engineering,  construction  and diversified  services
firms in the United States.  The shares of Fluor  Corporation  are traded on The
New  York  Stock  Exchange.  Through  Fluor,  and  other  domestic  and  foreign
subsidiaries, Fluor Corporation provides engineering, procurement, construction,
maintenance and other diversified  services on a worldwide basis to an extensive
range  of  industrial,   commercial,  utility,  natural  resources,  energy  and
governmental clients.

    FDESI's executive offices are located in Irvine, California.  FDESI operates
principally from six regional offices in the United States.

    The services  provided by FDESI include the preparation of studies,  reports
and designs,  and construction and construction  management  associated with the
following  environmental areas:  regulatory compliance,  air, water, waste water
and solid wastes, waste minimization, environmental assessment, risk assessment,
waste water  treatment  and  hazardous  waste  remediation.  FDESI also provides
substantial   support  to  other  Fluor  operating  companies  in  the  area  of
environmental  licensing and  permitting  of major  industrial,  commercial  and
government facilities.

    These   services  are  provided  by  engineers  and  scientists  of  various
disciplines employed by FDESI. The services provided are generally the result of
regulatory programs promulgated by state and U.S. federal agencies which include
the National  Environmental  Policy Act, the Clean Water Act, the Clean Air Act,
the  Resource   Conservation  and  Recovery  Act  ("RCRA"),   the  Comprehensive
Environmental Response, Compensation and Liability Act ("CERCLA" or "Superfund")
and the National Pollutant  Discharge  Elimination  System. The business of both
FDESI and GTI are subject to many of the same environmental regulations.

    FDESI  does not own any  hazardous  or solid  waste  treatment,  storage  or
disposal facility.  At January 23, 1996, FDESI had 159 employees,  including 143
professionals such as civil engineers,  environmental engineers,  geologists and
hydrogeologists.

 CLIENTS

    FDESI's clients fall into two broad categories:  federal  government clients
and private  commercial  clients.  The primary  federal clients of FDESI are the
United  States   Department  of  Defense  (the  "DOD")  and  the  United  States
Environmental  Protection  Agency  (the  "EPA").  FDESI's  private  clients  are
diverse, and include oil and gas companies and chemical companies.

    Federal.  FDESI  currently  has  five  significant  contracts  with  various
departments  and  agencies  of  the  federal  government.  These  contracts  are
generally of the Basic Ordering  Agreement  type,  under which a master contract
defines  the  general   scope  of  work  to  be  performed   and  the  financial
consideration  to be paid.  Individual  task orders are then issued for specific
projects to be performed  under the master  contract.  The  following  are those
contracts:

    *   U.S. Army,  Omaha District:  The Company is a prime  contractor  under a
        multi-year contract providing field investigations, remedial designs and
        construction  oversight  at various  military and civil sites across the
        U.S.  Work  includes  the   investigation   of  contaminated   soil  and
        groundwater  resulting  from  petroleum  spills,  landfills,   pesticide
        facilities  and other uses,  and providing  recommendations  for cleanup
        actions.

                                       44
<PAGE>

    *   U.S. Army Environmental  Center: The Company is a prime contractor under
        a five and one-half year  contract  with the DOD  involving  preliminary
        assessments,  investigations under RCRA and CERCLA,  corrective measures
        or  feasibility  studies,  and emergency  removal  actions for inorganic
        (e.g.,  heavy  metals)  and organic  contaminants  (e.g.,  solvents  and
        explosives) in soils and groundwater on Army installations.  Substantial
        remaining activities to be completed under this contract are at two such
        installations.

    *   U.S. Navy  Environmental  Restoration  Program:  Under a subcontract  to
        Ogden  Energy,  FDESI is  assisting  the United  States  Navy's  Pacific
        Division  of the Naval  Facilities  Engineering  Command in meeting  its
        mandate to clean up Naval Installations  under the Navy's  Environmental
        Restoration Program. This work involves intensive background searches on
        past  practices  and  land  use,  as well as  multi-media  environmental
        studies and investigative work,  resulting in actions to be taken by the
        Navy to effect the clean-up. Recent work included the review of land use
        since World War II of 33 different parcels within the Navy boundary, and
        well  drilling  to identify  the nature and scope of the  contamination.
        FDESI is also  determining  the nature and  extent of  contamination  at
        active Naval Bases, such as the Pearl Harbor Naval Shipyard, where FDESI
        has identified the source of fuel oil that is contaminating Pearl Harbor
        and has  developed  a plan for  containing  the fuel oil  migration  and
        ultimate clean-up.

    *   U.S. Navy,  Facilities  Engineering Command:  FDESI has a prime contract
        with the Navy for clean-up of hazardous  waste sites at certain Navy and
        Marine  Corps  activities  worldwide.  Under  this  contract  FDESI must
        identify, assess and clean-up hazardous waste sites, including both soil
        and  water,  to safe  and  acceptable  levels.  This may  include  rapid
        response  to  meet  emergency  requirements,  and  demonstration  of new
        technologies to accelerate  clean-up.  FDESI has recently commenced work
        on this  contract and the initial  work has been focused on  determining
        the nature and extent of  contamination  at the former Navy Dry-dock and
        Repair  Facility in San Juan,  Puerto Rico prior to turning the facility
        over to the Commonwealth of Puerto Rico.

    *   U.S. EPA, ARCS: FDESI has provided engineering and technical services to
        the EPA at a variety of  hazardous  waste sites (also known as Superfund
        Sites) in 15 states  throughout  the  midwest.  The work  performed  has
        included    technical    assistance,    field    investigations,    site
        characterization,  evaluation  ofremediation  alternatives,  engineering
        designs,  and management of cleanup of hazardous waste sites. Work under
        this contract has included  development and design of treatment  methods
        for  several  acidic   refinery   sludge  pits.   FDESI   completed  the
        investigations,  developed the treatment methods,  designed the remedial
        actions and managed completion of the cleanup construction projects.

    Commercial.  In addition to the federal  contracts noted above,  FDESI staff
provide   environmental   services  to  a  number  of  private  clients  through
sub-contracts  to  FDESI.   These  projects   currently   include  managing  and
implementing  hazardous  waste  remediations in California,  Indiana,  Illinois,
Missouri, New York and other locations. Examples of these projects include:

    *   FDESI is operating and  maintaining a desorption  and recovery unit at a
        former   refinery  site  in  Missouri.   The  unit  is  processing  soil
        contaminated with organics, petroleum products and metals and recovering
        hydrocarbons for re-refining.  Other activities at this site include the
        preparation  of a Health and Safety plan,  Performance  Test plan,  risk
        assessment, and a Comprehensive Site Treatment Plan.

    *   At Crab Orchard National Wildlife Refuge in Marion,  Illinois,  an FDESI
        project team is serving as the Project  Manager on the  remediation of a
        Superfund  Site known as the  Sangamo/Crab  Orchard PCB Operable Unit. A
        thermal  treatment  facility will be erected and the contaminated  soils
        and lake sediments treated prior to backfilling. A RCRA landfill will be
        built to contain soils and sediments which remain contaminated with lead
        and cadmium after thermal treatment.

                                       45
<PAGE>

BACKLOG

    The FDESI backlog of awarded projects and tasks at January 31, 1995 and 1996
was  approximately  $36.4 million and $63.9  million,  respectively.  Other work
authorizations  from existing Basic Ordering  Agreement  contracts may be issued
from time to time, however, current backlog is not necessarily indicative of the
future  earnings  of FDESI  related to the  performance  of such work.  Although
backlog  represents only business which is considered by FDESI to be firm, there
are no assurances that cancellations or scope adjustments will not occur.

CONTRACTS

    FDESI conducts  business  under various types of  contractual  arrangements,
including cost reimbursable (plus fixed or percentage fee),  all-inclusive rate,
unit price, fixed or maximum price and incentive fee contracts.  These contracts
are either competitively bid and awarded or individually negotiated. In terms of
dollar amount,  the majority of FDESI's  contracts are of the cost  reimbursable
type. Under a fixed-price contract, the customer agrees to pay a specified price
for FDESI's  performance of the entire  contract.  Fixed-price  contracts  carry
certain inherent risks,  including risks of losses from  underestimating  costs,
problems  with new  technologies  and economic and other  changes that may occur
over  the  contract  period.  Consequently,  the  profitability  of  fixed-price
contracts  may  vary  substantially.  The  amount  of  the  fee  received  for a
cost-reimbursement  plus fixed and award fee contract partially depends upon the
government's  discretionary  periodic  assessment of FDESI's performance on that
contract.  FDESI's  fee from a  cost-reimbursement  plus  fixed  and  award  fee
contract may vary based upon FDESI's performance.

    Agencies of the Federal government are FDESI's most significant clients. For
the nine months ended  January 31, 1996,  the DOD accounted for 29.7% of FDESI's
net revenue.  Some  contracts  made with the Federal  government  are subject to
annual  approval  of  funding.   Limitations  imposed  on  spending  by  Federal
government  agencies  may  limit  the  continued  funding  of  FDESI's  existing
contracts with the Federal  government  and may limit FDESI's  ability to obtain
additional contracts. These limitations,  if significant,  could have a material
adverse  effect  on  FDESI.  To  date,  spending  limitations  have  not  had  a
significant  effect on FDESI. All contracts made with the Federal government may
be terminated by the  government at any time,  with or without  cause,  however,
none of FDESI's  government  contracts are subject to  renegotiation  of profits
with out a change in the contractual scope of work.

    Federal  government  agencies  have formal  policies  against  continuing or
awarding  contracts that would create actual or potential  conflicts of interest
with other activities or a contractor.  These policies,  among other things, may
prevent  FDESI  in  certain  cases  from  bidding  for or  performing  contracts
resulting  from  or  relating  to  certain  work  FDESI  has  performed  for the
government. FDESI has not experienced disqualification during a bidding or award
negotiation process by any government or private client expressly as a result of
a conflict of interest. In addition, services performed for a private client may
create  conflicts of interest which preclude or limit FDESI's  ability to obtain
work for another private entity.  FDESI attempts to identify actual or potential
conflicts of interest and to minimize the possibility  that such conflicts would
affect its work under  current  contracts  or its  ability to compete for future
contracts.

MARKETING

    The sales force of FDESI is organized  separately from its operations group.
It is comprised of a Vice  President of federal  sales,  and includes  sales and
marketing  representatives  located  in  Greenville,   South  Carolina,  Irvine,
California, Washington, D.C. and Houston, Texas.

COMPETITION

    The  markets  served by FDESI are highly  competitive  and for the most part
require  substantial  resources,  particularly  highly  skilled and  experienced
technical  personnel.  There are a large  number of  companies  competing in the
markets  served  by FDESI  some of  which  may have  greater  size or  financial
resources.  Competition is primarily  centered on performance and the ability to
provide the scientific,  engineering, planning and management skills required to
complete complex projects in a timely and cost efficient  manner.  FDESI derives
its competitive strength from its diversity, reputation for quality, procurement
capability,  project  management  expertise,  geographic  coverage,  ability  to
execute  projects of varying sizes,  strong safety record and experience  with a
wide range of services and technologies.

                                       46
<PAGE>

                 FLUOR DANIEL ENVIRONMENTAL SERVICES, INC.
                          SELECTED FINANCIAL DATA
                             ($ IN THOUSANDS)

<TABLE>
<CAPTION>

                                                                                                        NINE MONTHS ENDED
                                                       YEAR ENDED APRIL 30,                                JANUARY 31,
                                                       --------------------                                -----------
                                     1991          1992          1993          1994         1995        1995          1996
                                     ----          ----          ----          ----         ----        ----          ----
                                  (UNAUDITED)   (UNAUDITED)   (UNAUDITED)   (UNAUDITED)             (UNAUDITED)   (UNAUDITED)
<S>                               <C>           <C>           <C>           <C>           <C>       <C>           <C>
OPERATING RESULTS
Revenues                            $ 9,596       $ 33,951      $ 41,253      $ 52,755    $ 35,425    $24,889       $ 26,319
Net Earnings (loss)(1)                (994)          (980)          316           682         656         892           489
FINANCIAL POSITION
Total assets                         1,062          2,267         1,658         1,475       3,022         322         5,453
Parent Company Investment            1,062          2,267         1,515         1,155       2,661        (782)        4,559
</TABLE>

(1) Substantially  all net  earnings  have  been  remitted  to  Fluor  to  repay
    intercompany advances. FDESI has never declared or paid dividends.

MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF
OPERATIONS

    The following discussion and analysis is provided to increase  understanding
of,  and  should be read in  conjunction  with,  the  financial  statements  and
accompanying   notes   respecting   FDESI  included   elsewhere  in  this  Proxy
Statement/Prospectus.

 OVERVIEW

    Pursuant to the Investment  Agreement,  FDESI will merge into GTI as part of
an overall  transaction  wherein Fluor will acquire  approximately  a 55 percent
ownership interest in GTI.

    The financial  data  presented  herein  reflects the financial  position and
results of operations as if the contracts  and personnel  which  constitute  the
environmental  remediation  business  of Fluor  Corporation  had been  operating
entirely  through  FDESI  for all  periods  presented.  Operations  reflect  all
environmental  remediation  contract work  performed by Fluor  personnel for all
federally funded  non-Department of Energy contracts,  remediation  projects for
other government  agencies and  environmental  risk  assessment,  permitting and
remediation  for commercial  clients,  for the periods  presented.  Additionally
FDESI  provides  certain  environmental  consulting  services to Fluor and other
affiliated entities. Revenues from these consulting services have been reflected
in accordance with the Marketing  Agreement to be signed in conjunction with the
Investment Agreement. Under the terms of the Marketing Agreement, affiliates are
charged for labor cost plus established multipliers on base compensation. Due to
the variable and often  unpredictable  nature of FDESI's work load, services are
provided to Fluor as conditions allow.

    Indirect expenses include  non-project  costs of all environmental  services
personnel assigned to the environmental operations of Fluor who are available to
provide services to FDESI's clients and other Fluor clients. Additionally, other
indirect  expenses  primarily  include  charges from Fluor for the fair value of
rent for  occupied  space,  computer  usage and other  costs.  There has been no
allocation  of  corporate  general  and  administrative  expenses  by  Fluor  as
management believes that no significant general and administrative expenses were
incurred  with  respect to FDESI's  operations  beyond  those  reflected  in the
financial statements.

    FDESI's  operations  include  projects in both the commercial and government
sectors.  Although the mix of projects fluctuates from year to year,  government
projects  represent  a  significant  portion of total  revenues.  Revenues  from
government projects  contributed 38 percent and 50 percent to total revenues for

                                       47
<PAGE>

the nine months ended January 31, 1995 and 1996,  respectively,  and 17 percent,
13 percent and 39 percent for the years  ended  April 30,  1993,  1994 and 1995,
respectively.  The uncertain timing of project awards can create  variability in
FDESI's  operations,   consequently,   trends  are  difficult  to  predict  with
certainty.

    The effective tax rate on earnings is essentially  unchanged for all periods
presented.  Under a tax  allocation  practice,  FDESI is charged or  credited by
Fluor for Federal income taxes,  if any,  generally at the U.S.  statutory rate.
FDESI is also charged or credited for State income taxes.

 NINE MONTHS ENDED JANUARY 31, 1995 COMPARED WITH NINE MONTHS ENDED JANUARY
 31,1996

    Revenues and net  earnings  for the nine months ended  January 31, 1995 were
$24,889,000 and $892,000,  respectively,  compared with $26,319,000 and $489,000
for the nine  months  ended  January  31,  1996.  The  increase  in  revenues is
primarily  attributable to higher revenues on Department of Defense contracts in
1996 compared with 1995. These projects contributed $9,578,000 to total revenues
for the nine months ended  January 31, 1995 compared  with  $13,302,000  for the
same period of 1996.  This  increase was partially  offset by lower  revenues on
commercial projects in 1996 compared with 1995.  Government projects contributed
38 percent of total revenues for the nine months ended January 31, 1995 compared
with 50 percent for the same period of 1996.

    Total indirect expenses  increased from $3,477,000 for the nine months ended
January 31, 1995 to  $4,963,000  for the same period of 1996,  due  primarily to
increased proposal costs for environmental  remediation on Department of Defense
prospects.

 FISCAL 1994 COMPARED WITH FISCAL 1995

    Revenues and net earnings for the year ended April 30, 1994 were $52,755,000
and $682,000, respectively,  compared with $35,425,000 and $656,000 for the year
ended April 30, 1995. The decrease in revenues is primarily  attributable to the
completion  of two large  commercial  projects  in early  1995.  These  projects
contributed  $39,408,000 to total revenues in 1994 compared with  $10,174,000 in
1995. This decrease was partially  offset by higher revenues on DOD contracts in
1995 compared with 1994.  Government  projects  contributed  13 percent of total
revenues for the year ended April 30, 1994 compared with 39 percent for the year
ended April 30, 1995.

    Total indirect  expenses  increased from $4,229,000 for the year ended April
30, 1994 to  $5,939,000  for the same period of 1995 due  primarily to increased
proposal costs for environmental  remediation on DOD prospects.  These increased
costs  contributed to a net loss of  approximately  $200,000  experienced in the
last half of fiscal 1995.

 FISCAL 1993 COMPARED WITH FISCAL 1994

    Revenues and net earnings for the year ended April 30, 1993 were $41,253,000
and $316,000, respectively,  compared with $52,755,000 and $682,000 for the year
ended April 30, 1994.  These  increases are primarily  attributable to two large
commercial  projects  that  contributed  $24,699,000  to total  revenues in 1993
compared with $39,408,000 in 1994. Government projects contributed 17 percent of
total  revenues for the year ended April 30, 1993  compared  with 13 percent for
the year ended April 30, 1994.

    Total indirect  expenses  decreased from $5,277,000 for the year ended April
30,  1993 to  $4,229,000  for the year ended  April 30,  1994 due  primarily  to
increased  utilization of available  personnel in connection  with the two large
commercial projects in 1994.

 FINANCIAL POSITION AND LIQUIDITY

    FDESI advances to and receives from Fluor non-interest  bearing funds. FDESI
is dependent upon Fluor for continued financing,  including funding required, if
any, for settlement of claims,  working capital requirements and third party bid
and  performance  guarantees  made in the ordinary  course of business.  Amounts
required  to fund  working  capital  are  provided  by Fluor  and the  excess is
advanced  to Fluor.  For all periods  presented  in the  accompanying  financial
statements,  changes in the components of working  capital reflect the impact of
project  activity  on  billed  and  unbilled  work  in  progress.  FDESI  has no
commitments for capital expenditures.

                                       48
<PAGE>

MARKET PRICE; DIVIDENDS; HOLDERS OF CAPITAL STOCK 

 OUTSTANDING STOCK

    All of the  outstanding  shares of FDESI,  which  consist of 1,000 shares of
Common  Stock,  no par value,  are owned by Fluor,  and have been owned by Fluor
since  the  incorporation  of  FDESI in 1990.  Accordingly,  there is no  public
trading market for FDESI common stock,  and no sales price  information for such
stock is available. FDESI has not issued any options or warrants to purchase its
common stock, nor any securities convertible into its common stock. No shares of
common stock of FDESI may be sold pursuant to Rule 144 under the  Securities Act
of 1933, as amended.  FDESI has not agreed to register any of its securities for
public sale, nor is it presently proposing any such public offering. As a result
of the Merger,  all of the shares of FDESI held by Fluor will be converted  into
the right to receive an aggregate of 4,400,000 shares of New Common Stock of the
Company at the Closing.

 DIVIDENDS

    As a wholly owned  subsidiary  of Fluor,  substantially  all net earnings of
FDESI have been  remitted  to Fluor to repay  intercompany  advances.  FDESI has
never declared or paid dividends. FDESI will become a wholly owned subsidiary of
GTI following the Merger, and may from time to time declare and pay dividends to
GTI.  FDESI is not aware of any  restrictions  at present on its  ability to pay
dividends.

 HOLDERS

    All of the outstanding stock of FDESI is owned of record and beneficially by
Fluor. No other person,  including the directors and officers of FDESI,  own any
securities  of FDESI.  There have been no changes in control of FDESI  since the
beginning of the last fiscal year of FDESI.

                                       49
<PAGE>

                 UNAUDITED PRO FORMA FINANCIAL INFORMATION

    The following  tables  represent  summary  unaudited pro forma  consolidated
income statement  information of the Company ("Fluor Daniel GTI, Inc." after the
Transactions)  for the year  ended  April  29,  1995 and the nine  months  ended
January 27, 1996 and balance sheet information as of January 27, 1996 giving pro
forma effect to the (i) conversion of each share of Common Stock  outstanding at
each  period end into  $8.62 in cash and 0.5274 of a share of New Common  Stock,
(ii) the issuance  and sale of 4,400,000  shares of New Common Stock to Fluor in
exchange for all outstanding  shares of FDESI and $33.35 million in cash,  (iii)
the  issuance  and sale of the Option to Fluor for $1.65  million,  (iv) certain
costs  incurred  in  connection  with  the  Transactions,  (v)  amortization  of
goodwill,  and (vi)  discontinued  laboratory  operations.  The  Merger has been
accounted for as a reverse acquisition of GTI by FDESI.

    The summary unaudited pro forma consolidated  financial information does not
purport  to  represent  what the  Company's  financial  position  or  results of
operations  actually  would  have  been had the  transactions  described  in the
preceding  paragraph in fact  occurred on such date, or to project the Company's
financial position or results of operations for any future date or period.

    The unaudited pro forma consolidated financial information should be read in
conjunction  with the 1995  financial  statements of FDESI and the notes thereto
included in this Proxy  Statement/Prospectus,  the 1995  consolidated  financial
statements  of the Company and the notes  thereto  and the  unaudited  quarterly
consolidated financial information of the Company incorporated by reference into
this Proxy Statement/ Prospectus. See "INCORPORATION OF DOCUMENTS BY REFERENCE."

                                       50
<PAGE>

                            UNAUDITED PRO FORMA
                   CONSOLIDATED FINANCIAL INFORMATION OF
                          FLUOR DANIEL GTI, INC.
                 (IN THOUSANDS, EXCEPT PER SHARE AMOUNTS)

<TABLE>
<CAPTION>

                                                                                YEAR ENDED APRIL 29, 1995
                                                                                -------------------------
                                                                       GTI       FDESI     PRO FORMA     PRO FORMA
                                                                      ACTUAL    ACTUAL    ADJUSTMENTS   CONSOLIDATED
                                                                      ------    ------    -----------   ------------
<S>                                                                  <C>        <C>       <C>           <C>
INCOME STATEMENT DATA:
Gross revenue                                                        $178,280   $35,425     $  --         $213,705
Cost of subcontracted services                                         69,083     --          9,454         78,537
                                                                       ------   -------       -----         ------
Net revenue                                                           109,197    35,425      (9,454)       135,168
Cost of net revenues                                                   62,338    28,410      (9,454)        81,294
                                                                       ------    ------      ------         ------
Gross profit                                                           46,859     7,015       --            53,874
Selling, general and administrative expenses                          (39,647)   (5,939)       (204)       (45,790)
Licenses and other income                                                 683     --          --               683
                                                                       ------    ------      ------         ------
Operating income                                                        7,895     1,076        (204)         8,767
Investment and other income, net                                        1,138     --           (887)           251
                                                                       ------    ------      ------         ------
Income before taxes                                                     9,033     1,076      (1,091)         9,018
Income tax provision                                                    3,596       420       --             4,016
                                                                       ------    ------      ------         ------
Net income                                                           $  5,437   $   656     $(1,091)      $  5,002
                                                                     ========   =======     =======       ========
Earnings per share                                                   $   0.77                             $   0.62
                                                                     ========                             ========
Shares used to compute earnings per common share                        7,050                                8,118
                                                                        =====                                =====
</TABLE>



<TABLE>
<CAPTION>

                                                                           NINE MONTHS ENDED JANUARY 27, 1996
                                                                           ----------------------------------
                                                                       GTI       FDESI     PRO FORMA     PRO FORMA
                                                                      ACTUAL    ACTUAL    ADJUSTMENTS   CONSOLIDATED
                                                                      ------    ------    -----------   ------------
<S>                                                                  <C>        <C>       <C>           <C>
INCOME STATEMENT DATA:
Gross revenue                                                        $128,881   $26,319     $  --         $155,200
Cost of subcontracted services                                         49,277     --          9,679         58,956
                                                                       ------   -------       -----         ------
Net revenue                                                            79,604    26,319      (9,679)        96,244
Cost of net revenues                                                   48,433    20,554      (9,679)        59,308
                                                                       ------    ------      ------         ------
Gross profit                                                           31,171     5,765       --            36,936
Selling, general and administrative expenses                          (28,867)   (4,963)       (142)       (33,972)
Licenses and other income                                                 562     --          --               562
                                                                       ------    ------      ------         ------
Operating Income                                                        2,866       802        (142)         3,526
Investment and other income, net                                        1,038     --           (605)           433
                                                                       ------    ------      ------         ------
Income before taxes                                                     3,904       802        (747)         3,959
Income tax provision                                                    1,544       313       --             1,857
                                                                       ------    ------      ------         ------
Net income                                                           $  2,360   $   489     $  (747)      $  2,102
                                                                     ========   =======     =======       ========
Earnings per share                                                   $   0.34                             $   0.26
                                                                     ========                             ========
Shares used to compute earnings per common share                        7,042                                8,114
                                                                        =====                                =====
</TABLE>

                                       51
<PAGE>

                            UNAUDITED PRO FORMA
                   CONSOLIDATED FINANCIAL INFORMATION OF
                          FLUOR DANIEL GTI, INC.
                          (DOLLARS IN THOUSANDS)

<TABLE>
<CAPTION>

                                                                                    JANUARY 27, 1996
                                                                                    ----------------
                                                                       GTI      FDESI     PRO FORMA     PRO FORMA
                                                                      ACTUAL    ACTUAL   ADJUSTMENTS   CONSOLIDATED
                                                                      ------    ------   -----------   ------------
<S>                                                                  <C>        <C>      <C>           <C>
BALANCE SHEET DATA:

                                                      ASSETS

Current assets:
   Cash and cash equivalents                                         $  9,351   $  --     $ (3,186)      $  6,165
   Marketable securities                                               23,491     --       (23,491)         --
   Accounts receivable, less allowance                                 43,215    2,564       --            45,779
   Unbilled revenues                                                   16,327    2,889       --            19,216
   Other current assets                                                 9,649     --         --             9,649
                                                                        -----  -------      ------          -----
       Total current assets                                           102,033    5,453     (26,677)        80,809
Property, plant and equipment, net                                      8,643     --         --             8,643
Other assets, net                                                       8,958     --         5,662         14,620
                                                                        -----   ------       -----         ------
                                                                     $119,634   $5,453    $(21,015)      $104,072
                                                                     ========   ======    ========       ========

                                       LIABILITIES AND STOCKHOLDERS' EQUITY

Current liabilities:
   Accounts payable                                                  $  6,613   $  --     $  --          $  6,613
   Accrued salaries and benefits                                        3,508      --        --             3,508
   Other accrued liabilities                                            9,781      894       2,000         12,675
                                                                        -----      ---       -----         ------
       Total current liabilities                                       19,902      894       2,000         22,796
Stockholders' equity:
   Preferred stock                                                      --         --        --             --
   Common stock                                                            81        1         (74)             8
   Additional paid-in capital                                          55,965      335      24,799         81,099
   Treasury stock, at cost                                            (17,210)     --       17,210          --
   Parent company investment                                            --       4,054      (4,054)         --
   Cumulative currency translation adjustment                          (1,192)     --        1,192          --
   Retained earnings                                                   62,088      169     (62,088)           169
                                                                       ------      ---     -------            ---
       Total stockholders' equity                                      99,732    4,559     (23,015)        81,276
                                                                       ======    =====     =======         ======
       Total liabilities and stockholders' equity                    $119,634   $5,453    $(21,015)      $104,072
                                                                     ========   ======    ========       ========
</TABLE>

- --------

(1) Pro  forma   adjustments   have  been  made  to  reflect   FDESI's  cost  of
    subcontracted services in the Company's reporting presentation format.

(2) Pro forma  adjustments  to reflect the impact to interest  income that would
    have  occurred  had the  Transactions  taken place at the  beginning  of the
    periods have been  presented.  The average  interest rate earned on cash and
    cash equivalents and marketable securities was approximately 4.35% and 4.17%
    in fiscal 1995 and for the nine months ended January 27, 1996, respectively.
    The interest income earned was substantially all federal tax-free.

(3) As a result of the  Recapitalization,  each share of Common Stock (par value
    $.01) outstanding at the Effective Time will be converted into $8.62 in cash
    and 0.5274 of a share of newly issued New Common Stock (par value $.001).  A

                                       52
<PAGE>

    pro forma  adjustment  has been made to reflect the  conversion of 6,963,550
    shares of Common Stock outstanding at January 27, 1996 into 3,672,576 shares
    of New Common Stock.  In  connection  with the  Recapitalization,  pro forma
    adjustments  have been made to  additional  paid-in  capital to reflect  the
    distribution  to  the  Company's   stockholders   of  $60,025,801.   In  the
    Recapitalization,  all treasury shares, in the dollar amount of $17,210,000,
    will be eliminated.

(4) In the  Merger,  the  Company  will issue to Fluor  4,400,000  shares of New
    Common  Stock   (approximately  55%  of  the  New  Common  Stock  after  the
    Transactions)  in  exchange  for all of the  outstanding  shares of  Fluor's
    wholly-owned subsidiary FDESI and $33,350,000 in cash, and FDESI will become
    a wholly-owned  subsidiary of the Company. The Merger has been accounted for
    as a reverse  acquisition of GTI by FDESI. The pro forma adjustments include
    the  recognition  of  goodwill  in the amount of  $5,662,000,  which will be
    amortized over 30 years, and the elimination of (a) retained earnings of the
    Company of $62,088,000,  (b) currency translation  adjustment of the Company
    of $1,192,000 and (c) FDESI's parent investment of $4,054,000.

(5) Pro forma adjustments reflect transaction costs estimated to be
    $2,000,000.

(6) Pro forma weighted  average  shares used to compute  earnings per share have
    been calculated by multiplying  the weighted  average shares for the periods
    presented by the 0.5274  conversion  factor in the Recapi-  talization,  and
    then adding  4,400,000  shares of New Common  Stock to be issued to Fluor in
    the Merger.

(7) The allocation of the purchase price is not expected to significantly change
    from that shown on the pro forma balance sheet.

                                       53
<PAGE>

                                 LEGAL MATTERS

    The  legality of the shares of New Common  Stock to be issued in  connection
with the  Transactions  will be passed upon for the Company by Testa,  Hurwitz &
Thibeault, counsel for the Company.

                                     EXPERTS

    The  consolidated  financial  statements  of  Groundwater  Technology,  Inc.
incorporated by referenced in Groundwater Technology, Inc.'s Annual Report (Form
10-K) for the year ended April 29, 1995, have been audited by Ernst & Young LLP,
independent  auditors,  as set forth in their  report  thereon  incorporated  by
reference  therein  and  incorporated  herein by  reference.  Such  consolidated
financial  statements are incorporated herein by reference in reliance upon such
report  given  upon the  authority  of such firm as experts  in  accounting  and
auditing.

    The financial  statements of Fluor Daniel  Environmental  Services,  Inc. at
April 30, 1995,  and for the year ended April 30, 1995,  appearing in this Proxy
Statement/Prospectus  have  been  audited  by  Ernst  & Young  LLP,  independent
auditors,  as set forth in their report thereon appearing  elsewhere herein, and
are included in reliance  upon such report given upon the authority of such firm
as experts in accounting and auditing.

                              STOCKHOLDER PROPOSALS

    Proposals of  stockholders  intended for inclusion in the proxy statement to
be mailed to all stockholders entitled to vote at the next annual meeting of the
Company must be received at the Company's  principal executive offices not later
than April 12, 1996. In order to curtail  controversy  as to the date on which a
proposal was received by the Company,  it is suggested  that  proponents  submit
their proposals by Certified Mail -- Return Receipt Requested.

    In addition,  the Company's By-laws require the stockholders to give advance
notice and furnish certain  information to the Company in order to bring matters
of business  before an annual  meeting or to nominate a person for election as a
director at an annual  meeting or special  meeting at which  directors are to be
elected.  Any such  notice must be received  on or before  April 26,  1996,  for
purposes of the  Special  Meeting  (with  respect to the  election of  directors
only), and on or before August 25, 1996 for purposes of the next annual meeting.

                                       54
<PAGE>

                   FLUOR DANIEL ENVIRONMENTAL SERVICES, INC.

                           FINANCIAL STATEMENTS

                   YEARS ENDED APRIL 30, 1993, 1994, 1995 AND
                  NINE MONTHS ENDED JANUARY 31, 1995 AND 1996

                                 CONTENTS

<TABLE>
<S>                                                                            <C>
Report of Independent Auditors                                                 F-2
Financial Statements
   Statements of Earnings                                                      F-3
   Balance Sheets                                                              F-4
   Statements of Cash Flows                                                    F-5
   Statements of Parent Company Investment                                     F-6
   Notes to Financial Statements                                               F-7
</TABLE>

                                      F-1
<PAGE>

                         REPORT OF INDEPENDENT AUDITORS

The Board of Directors
 FLUOR DANIEL ENVIRONMENTAL SERVICES, INC.

    We have audited the accompanying balance sheet of Fluor Daniel Environmental
Services,  Inc. as of April 30, 1995,  and the related  statements  of earnings,
cash  flows  and  parent  company  investment  for the year  then  ended.  These
financial  statements are the  responsibility of the Company's  management.  Our
responsibility  is to express an opinion on these financial  statements based on
our audit.

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

    As more fully  described  in Notes 1 and 4, the  Company  is a wholly  owned
subsidiary  of Fluor  Daniel,  Inc.  and has  material  transactions  with Fluor
Daniel, Inc. and its affiliates.

    In our opinion,  the financial  statements referred to above present fairly,
in all material respects,  the financial position of Fluor Daniel  Environmental
Services,  Inc. at April 30, 1995 and the results of its operations and its cash
flows for the year then ended in conformity with generally  accepted  accounting
principles.

                                            /s/ ERNST & YOUNG LLP

Orange County, California
December 22, 1995

                                      F-2
<PAGE>

                   FLUOR DANIEL ENVIRONMENTAL SERVICES, INC.

                          STATEMENTS OF EARNINGS

                             ($ IN THOUSANDS)

<TABLE>
<CAPTION>

                                                                                               NINE MONTHS ENDED
                                                            YEAR ENDED APRIL 30,                  JANUARY 31,
                                                            --------------------                  -----------
                                                        1993          1994        1995        1995          1996
                                                        ----          ----        ----        ----          ----
                                                    (UNAUDITED)   (UNAUDITED)             (UNAUDITED)    (UNAUDITED)
<S>                                                 <C>           <C>           <C>       <C>            <C>
Revenues                                              $41,253       $52,755     $35,425     $24,889        $26,319
Direct project costs                                   35,463        47,408      28,410      19,950         20,554
Indirect expenses:
   Payroll and related costs                            4,034         2,924       4,229       2,417          3,265
   Other                                                1,243         1,305       1,710       1,060          1,698
                                                        -----         -----       -----       -----          -----
                                                       40,740        51,637      34,349      23,427         25,517
                                                       ------        ------      ------      ------         ------
Earnings before taxes                                     513         1,118       1,076       1,462            802
Income tax expense                                        197           436         420         570            313
                                                          ---           ---         ---         ---            ---
Net earnings                                          $   316       $   682     $   656     $   892        $   489
                                                      =======       =======     =======     =======        =======
</TABLE> 

                 See accompanying notes to financial statements.

                                      F-3
<PAGE>

                 FLUOR DANIEL ENVIRONMENTAL SERVICES, INC.

                              BALANCE SHEETS

                             ($ in thousands)

<TABLE>
<CAPTION>

                                                                          APRIL 30,
                                                                          ---------
                                                                                            JANUARY 31,
                                                                        1994        1995       1996
                                                                        ----        ----       ----
                                                                     (UNAUDITED)            (UNAUDITED)
<S>                                                                  <C>           <C>        <C>

                                                ASSETS

Current assets:
   Accounts receivable                                                 $  215      $2,617     $2,564
   Contract work in progress                                            1,260         405      2,889
                                                                        -----         ---      -----
          Total current assets                                         $1,475      $3,022     $5,453
                                                                       ======      ======     ======

                               LIABILITIES AND PARENT COMPANY INVESTMENT

Current liabilities:
   Advance billings on contracts                                       $  320      $  361     $  894
   Contingencies and commitments Parent company investment:
       Common stock -- $1 par value, $1,000 shares authorized, issued
        and outstanding                                                     1           1          1
       Additional capital                                                 335         335        335
       Retained earnings (defict)                                        (976)       (320)       169
       Advances (to) from parent                                        1,795       2,645      4,054
                                                                        -----       -----      -----
          Total parent company investment                               1,155       2,661      4,559
                                                                        -----       -----      -----
                                                                       $1,475      $3,022     $5,453
                                                                       ======      ======     ======
</TABLE>

                 See accompanying notes to financial statements.

                                      F-4
<PAGE>

                   FLUOR DANIEL ENVIRONMENTAL SERVICES, INC.

                            STATEMENTS OF CASH FLOWS

                                ($ IN THOUSANDS)

<TABLE>
<CAPTION>

                                                                                               NINE MONTHS ENDED
                                                            YEAR ENDED APRIL 30,                  JANUARY 31,
                                                            --------------------                  -----------
                                                        1993          1994        1995        1995          1996
                                                        ----          ----        ----        ----          ----
                                                    (UNAUDITED)   (UNAUDITED)             (UNAUDITED)    (UNAUDITED)
<S>                                                 <C>           <C>           <C>       <C>            <C>
OPERATING ACTIVITY:
Net earnings                                          $   316       $   682     $   656     $   892        $   489
Adjustments to reconcile net earnings to net cash 
  provided (utilized) by operating activities:
   Changes in operating assets and liabilities:
       Accounts receivable                                 40           999      (2,402)        (55)            53
       Contract work in progress                          569          (816)        855       1,208         (2,484)
       Advance billing on contracts                       143           177          41         784            533
       Advances (to) from parent                       (1,068)       (1,042)        850      (2,829)         1,049
                                                       ------        ------         ---      ------          -----
          Net cash provided (utilized) by
           operating activities                          --            --          --          --             --
Cash and cash equivalents at beginning of period         --            --          --          --             --
                                                      -------       -------     -------      ------        -------
Cash and cash equivalents at end of period            $  --         $  --       $  --       $  --          $  -- 
                                                      =======       =======     =======     =======        =======
</TABLE>

                 See accompanying notes to financial statements.

                                      F-5
<PAGE>

                   FLUOR DANIEL ENVIRONMENTAL SERVICES, INC.

                     STATEMENTS OF PARENT COMPANY INVESTMENT

                                ($ IN THOUSANDS)

<TABLE>
<CAPTION>

                                                                           RETAINED    ADVANCES      PARENT
                                                    COMMON   ADDITIONAL    EARNINGS   (TO) FROM     COMPANY
                                                     STOCK     CAPITAL    (DEFICIT)     PARENT     INVESTMENT
<S>                                                  <C>       <C>        <C>           <C>        <C>
Balance, April 30, 1992                               $1        $335       $(1,974)     $ 3,905     $ 2,267
   Net earnings                                       --         --            316        --            316
   Advances (to) from parent                          --         --          --          (1,068)     (1,068)
                                                      --        ----       -------      -------     -------
Balance, April 30, 1993                                1         335        (1,658)       2,837       1,515
   Net earnings                                       --         --            682        --            682
   Advances (to) from parent                          --         --          --          (1,042)     (1,042)
                                                      --        ----       -------      -------     -------
Balance, April 30, 1994                                1         335          (976)       1,795       1,155
   Net earnings                                       --         --            656        --            656
   Advances (to) from parent                          --         --          --             850         850
                                                      --        ----       -------      -------     -------
Balance, April 30, 1995                                1         335          (320)       2,645       2,661
   Net earnings                                       --         --            489        --            489
   Advances (to) from parent                          --         --          --           1,409       1,409
                                                      --        ----       -------      -------     -------
Balance, January 31, 1996                             $ 1       $ 335      $   169      $ 4,054     $  4,559
                                                      ===       =====      =======      =======     ========
</TABLE>

              See accompanying notes to financial statements.

                                      F-6
<PAGE>

                   FLUOR DANIEL ENVIRONMENTAL SERVICES, INC.

                          NOTES TO FINANCIAL STATEMENTS

1. SIGNIFICANT ACCOUNTING POLICIES

 ORGANIZATION AND BASIS OF PRESENTATION

    Fluor Daniel Environmental  Services,  Inc. (the Company), is a wholly-owned
subsidiary of Fluor Daniel, Inc. (Fluor Daniel), which through a holding company
is  indirectly a  wholly-owned  subsidiary  of Fluor  Corporation  (Fluor).  For
purposes of this presentation,  the Company's fiscal year has been designated as
the annual period ending on April 30, however, for tax purposes, the year end is
October 31. Pursuant to an Investment Agreement dated December 11, 1995, between
Groundwater Technology, Inc. (GTI) and Fluor Daniel, the Company will merge into
GTI as part of an overall  transaction  wherein  Fluor will acquire a 55 percent
ownership interest in GTI.

    The  accompanying  financial  statements  have been  adjusted to reflect the
"carved-out"  financial  position,  results of operations  and cash flows of the
Company as if the contracts  and personnel  that  constitute  the  environmental
remediation  business  of  Fluor  had  been  operating  as  a  separate  entity.
Operations  reflect all  environmental  remediation  contract work  performed by
Fluor personnel for all federally  funded  non-Department  of Energy  contracts,
remediation  projects  for other  government  agencies  and  environmental  risk
assessment, permitting and remediation for commercial clients. Additionally, the
Company provides certain  environmental  consulting  services to Fluor and other
affiliated entities. Revenues from these consulting services have been reflected
in the  accompanying  statements in accordance  with a Marketing  Agreement (the
Agreement),  signed in conjunction with the Investment Agreement between GTI and
Fluor Daniel. Under the terms of the Agreement, affiliates are charged for labor
cost plus established multipliers on base compensation.  Due to the variable and
often unpredictable  nature of the Company's work load,  consulting services are
provided to Fluor as conditions allow.

    The financial  statements do not include an allocation of corporate  general
and administrative  expenses by Fluor as management believes that no significant
general and administrative  expenses were incurred with respect to the Company's
operations beyond those reflected in the accompanying financial statements.

    The Balance Sheet at April 30, 1995 and  Statements of Earnings,  Cash Flows
and Parent  Company  Investment  for the year ended  April 30,  1995,  have been
audited whereas all other periods presented are unaudited.

 SERVICE CONTRACTS

    The  Company  recognizes  revenues on  long-term  service  contracts  on the
percentage-of-completion  method,  primarily based on contract costs incurred to
date compared with total estimated  contract  costs.  Changes to total estimated
contract  costs and losses,  if any, are  recognized in the period in which they
are determined.  Revenues  recognized in excess of amounts billed are classified
as current assets under contract work in progress.  Amounts billed to clients in
excess of revenues  recognized  to date are  classified  as current  liabilities
under advance billings on contracts.  The Company anticipates that substantially
all incurred costs associated with contract work in progress at January 31, 1996
will be billed and collected  within twelve months.  Accounts  receivable do not
contain any significant  amounts billed but not paid under retainage  provisions
or claims.

 INDIRECT EXPENSES

    Indirect expenses include  non-project  costs of all environmental  services
personnel  assigned  to the  environmental  operations  of Fluor  Daniel who are
available to provide  services to the  Company's  clients and other Fluor Daniel
clients.  Additionally,  other indirect expenses  primarily include charges from
Fluor Daniel for the fair value of rent for occupied  space,  computer usage and
other costs.

                                      F-7
<PAGE>

                   FLUOR DANIEL ENVIRONMENTAL SERVICES, INC.

                  NOTES TO FINANCIAL STATEMENTS -- (CONTINUED)

1. SIGNIFICANT ACCOUNTING POLICIES -- (CONTINUED)

 CONCENTRATIONS OF CREDIT RISK

    The majority of accounts  receivable  and contract work in progress are from
services  provided to various U.S.  government  agencies.  These  contracts  are
typically cost reimbursable government funded contracts that require payments as
projects  progress or in certain cases advance  payments.  The Company maintains
reserves for potential  credit losses and such losses,  which have been minimal,
have been within management's estimates.

 INTERIM FINANCIAL INFORMATION

    The interim unaudited financial statements presented include all adjustments
(consisting only of normal adjustments) that management  considers necessary for
a fair  presentation  of its financial  position at such dates and its operating
results and cash flows for those  periods.  Results for interim  periods are not
necessarily indicative of results for the entire year.

 EARNINGS PER SHARE

    Earnings per share  information  has been  omitted  since the Company has no
publicly traded equity securities.

2. INCOME TAXES

    The  operations  of the Company are  included  in the  consolidated  federal
income tax return of Fluor.  Under a tax  allocation  practice,  the  Company is
charged or credited by Fluor for federal  income  taxes,  generally  at the U.S.
statutory rate. The Company is also charged or credited for state income taxes.

    As a result of the tax allocation practice, tax benefits associated with pre
1993 losses were  recognized in the year the loss  occurred.  If the Company had
filed a separate return,  these tax benefits would have been recognized in later
years,  resulting  in the  elimination  of  substantially  all of the income tax
expense for the years 1993 through 1995.

    Deferred  taxes reflect the tax effects of  differences  between the amounts
recorded as assets and  liabilities  for  financial  reporting  purposes and the
amount recorded for income tax purposes.  The Company does not have any deferred
income taxes.

    The income tax expense  included in the  Statement of Earnings is as follows
($ in thousands):

<TABLE>
<CAPTION>

                                                                                      NINE MONTHS ENDED
                                                     YEAR ENDED APRIL 30,                JANUARY 31,
                                                     --------------------                -----------
                                                  1993          1994       1995       1995          1996
                                                  ----          ----       ----       ----          ----
                                               (UNAUDITED)   (UNAUDITED)          (UNAUDITED)   (UNAUDITED)
<S>                                            <C>           <C>           <C>    <C>           <C>
Federal                                           $174          $380       $366       $418          $273
State                                               23            56         54         62            40
                                                    --            --         --         --            --
   Total Income Expense                           $197          $436       $420       $480          $313
                                                  ====          ====       ====       ====          ====
</TABLE>

    State taxes are the only significant  difference between the Company's total
tax expense and the U.S. Statutory Federal income tax.

                                      F-8
<PAGE>

                   FLUOR DANIEL ENVIRONMENTAL SERVICES, INC.

                  NOTES TO FINANCIAL STATEMENTS -- (CONTINUED)

3. EMPLOYEE BENEFITS

    Employees  of  the  Company  who  meet  certain   eligibility   requirements
participate in the  non-contributory  defined  contribution  retirement  plan of
Fluor.  Contributions  to this  plan  are  based  on a  percentage  of the  par-
ticipants'  gross  salaries.  In  addition,  eligible  employees  are allowed to
contribute up to 10 percent of their salaries to a savings  investment plan with
Fluor providing a matching  contribution up to 4 percent of their salaries.  The
cost of these  plans is  included  in the  payroll  burden  rate  charged to the
Company by Fluor Daniel.

4. RELATED PARTY TRANSACTIONS

    The Company advances to and receives  non-interest  bearing funds from Fluor
Daniel.  The Company is  dependent  upon Fluor Daniel for  continued  financing,
including  funding required,  if any, for settlement of claims,  working capital
requirements and third party bid and performance guarantees made in the ordinary
course of business.

    All direct and indirect labor has been provided by employees of Fluor Daniel
and the  Company is charged for all related  labor and benefit  costs.  Employee
benefit costs are charged to the Company by application of a payroll burden rate
to total base compensation. Such costs remain the liability of Fluor Daniel.

    Intercompany  revenues were  $6,167,000,  $4,613,000  and $4,941,000 for the
years ended April 30, 1993,  1994 and 1995,  respectively,  and  $3,456,000  and
$3,498,000 for the nine months ended January 31, 1995 and 1996, respectively.

5. CONTINGENCIES AND COMMITMENTS

    The Company is not  currently  involved in any legal  proceedings,  although
from time to time, it could become involved in litigation in the ordinary course
of business.  The Company is contingently liable for commitments and performance
guarantees  arising in the  ordinary  course of  business.  Claims  arising from
service contracts have been made against the Company by clients, and the Company
has made  certain  claims  against  clients for costs  incurred in excess of the
current  contract  provisions.  The Company  does not expect that the  foregoing
matters will have a material adverse effect on its financial position or results
of operations.

6. INDUSTRY SEGMENT INFORMATION

    The  Company  provides a wide range of  environmental  services  to both the
private and government sectors including scientific and engineering applications
from  environmental  assessment,  permitting and remediation  through design and
construction to operations and maintenance services. These services are provided
to a variety of  different  industries  including  petroleum,  chemical,  power,
pharmaceutical and others.

    In the fiscal year ended 1993,  1994 and 1995 and for the nine month periods
ended  January 31, 1995 and 1996,  revenues from U.S.  Federal  agencies were as
follows ($ in thousands):

<TABLE>
<CAPTION>

                                                                                         NINE MONTHS ENDED
                                                      YEAR ENDED APRIL 30,                  JANUARY 31,
                                                      --------------------                  -----------
                                                  1993          1994        1995         1995          1996
                                                  ----          ----        ----         ----          ----
                                               (UNAUDITED)   (UNAUDITED)             (UNAUDITED)   (UNAUDITED)
<S>                                            <C>           <C>           <C>       <C>           <C>
Department of Defense                            $1,065        $2,256      $10,255      $7,127        $7,827
Percent of total revenues                           2.6%          4.3%        28.9%       28.6%         29.7%
Environmental Protection Agency                  $5,741        $4,518      $ 3,712      $2,451        $5,375
Percent of total revenues                          13.9%          8.6%        10.5%        9.8%         20.4%
</TABLE>

                                      F-9
 
<PAGE>

Registration Statement on Form S-4
Groundwater Technology, Inc.

Annex A - Investment Agreement, as amended
Intentionally Omitted
See Exhibits 2.1 and 2.2 to Registration Statement

<PAGE>
                                                                         ANNEX B
                          DONALDSON, LUFKIN & JENRETTE
               Donaldson, Lufkin & Jenrette Securities Corporation
           277 Park Avenue, New York, New York 10172 * (212) 892-3000

                                                                  March 27, 1996

Board of Directors
Groundwater Technology, Inc.
100 River Ridge Drive
Norwood, MA 02062

Dear Sirs:

    We  understand  that  Groundwater  Technology,   Inc.  (the  "Company"), GTI
Acquisition  Corporation ("Newco"),  Fluor Daniel, Inc. ("FDI") and Fluor Daniel
Environmental  Services,  Inc. ("FDESI") contemplate entering into an Investment
Agreement dated as of December 11, 1995 (the "Investment Agreement").  Under the
terms of the Investment  Agreement (i) FDI will acquire,  in the merger of Newco
with and into FDESI (the  "Merger"),  4,400,000  shares of a new class of common
stock of the Company (the "New Common Stock"),  at which time it will deposit in
an exchange fund for the benefit of the shareholders of the Company  $33,350,000
of the approximately  $60,000,000 in the aggregate payable by the Company to its
shareholders in the  Recapitalization  (as defined below), (ii) the Company will
implement,  in  conjunction  with the Merger,  a plan of  recapitalization  (the
"Recapitalization") pursuant to which all of the existing shares of common stock
of the Company (the "Old Common Stock") will be  reclassified  into the right to
receive $8.62 per share in cash and 0.5274 of a share of New Common Stock, (iii)
the  Company  will  issue to FDI for  $1,650,000  an option  (the  "Option")  to
purchase for $17.00 per share in cash up to 1,366,000 shares of New Common Stock
(subject to adjustment under certain circumstances), exercisable under the terms
and conditions set forth in the proposed  Option  Agreement  between the Company
and FDI dated as of December  11, 1995 (the  "Option  Agreement"),  and (iv) the
Company,  FDI and FDESI will enter into the proposed  Marketing and Intercompany
Services  Agreements (such  agreements,  together with the Investment and Option
Agreements hereafter  collectively referred to as the "Transaction  Agreements")
which  provide,  among  other  things,  for the  conduct of their  environmental
services  business and certain  arrangements  for mutual  support and assistance
(the Merger,  Recapatilization and other transactions  described above hereafter
collectively referred to as the "Transaction").

    We have been  requested  by the  Company  to render  our  opinion  as to the
fairness, from a financial point of view, to the Company and its shareholders of
the consideration to be received by the Company and its shareholders  other than
FDI pursuant to the Transaction.

    In arriving at our opinion, we have reviewed the Transaction  Agreements and
financial and other  information that was publicly  available or furnished to us
by the Company,  FDESI or FDI, including information provided during discussions
with their managements.  Included in the information provided during discussions
with  management  were  certain  financial  projections  of  the  Company  on  a
stand-alone  basis prepared by the management of the Company and projections for
the  Company  following  the  transaction,  prepared by the  managements  of the
Company and FDI. In addition,  we have compared certain financial and securities
data of the  Company  on a  stand-alone  basis  and in  combination  with  FDESI
pursuant to the Transaction  with various other  companies whose  securities are
traded in public  markets,  reviewed  the  historical  stock  prices and trading
volumes of the common

                                      B-1

<PAGE>

Board of Directors
Groundwater Technology, Inc.
Page 2                                                            March 27, 1996

stock of the Company,  reviewed  prices and premiums paid in other  transactions
involving  disposition  of  assets  and  securities  and  conducted  such  other
financial  studies,  analyses and  investigations  as we deemed  appropriate for
purposes of this  opinion.  We were not  requested  to, nor did we,  solicit the
interest of any other party in  acquiring  the  outstanding  common stock of the
Company or the Company or its constituent businesses.

    In  rendering  our  opinion,  we have relied upon and assumed the  accuracy,
without  independent  verification,  completeness  and  fairness  of  all of the
financial and other  information  that was available to us from public  sources,
and  that was  provided  to us by the  Company  and  FDI,  or  their  respective
representatives,  or that was  otherwise  reviewed  by us.  With  respect to the
financial  projections  supplied  to  us,  we have  assumed  that they have been
reasonably  prepared  on the  basis  reflecting  the  best  currently  available
estimates  and  judgments  of the  managements  of the Company and FDI as to the
future  operating  and  financial  performance  of  the  Company  following  the
Transaction.  We have not assumed any  responsibility for making any independent
evaluation of the Company's  assets or  liabilities or for making an independent
verification of any of the information  reviewed by us. We have relied as to all
legal matters on advice of counsel to the Company.

    Our opinion is necessarily  based on economic,  market,  financial and other
conditions as they exist on, and on the  information  made available to us as of
the date of this  letter.  It should be  understood  that,  although  subsequent
developments  may affect this opinion,  we do not have any obligation to update,
revise or reaffirm this opinion.  We are  expressing no opinion herein as to the
prices at which the  securities  of the Company may actually  trade at any time.
Our opinion does not constitute a  recommendation  to any  shareholder as to how
such shareholder should vote on the proposed Transaction.

    Donaldson,  Lufkin & Jenrette Securities Corporation ("DLJ"), as part of its
investment banking services, is regularly engaged in the valuation of businesses
and securities in connection with mergers,  acquisitions,  underwritings,  sales
and  distribution  of listed and unlisted  securities,  private  placements  and
valuation for estate, corporate and other purposes. DLJ has performed investment
banking and other services for the Company in the past and has been  compensated
for such services.  In the ordinary  course of business,  DLJ may actively trade
the equity  securities of the Company for its own account and for the account of
customers  and,  accordingly,  may  hold  a  long  or  short  position  in  such
securities.

    Based upon the foregoing and such other factors as we deem relevant,  we are
of the  opinion  that the  consideration  to be  received by the Company and its
shareholders,  pursuant to the Transaction, as a whole, is fair from a financial
point of view to the Company and its shareholders.

                                               Very truly yours,

                                               DONALDSON, LUFKIN & JENRETTE
                                               SECURITIES CORPORATION
                                      B-2
<PAGE>

                              

                          GROUNDWATER TECHNOLOGY, INC.

            PROXY FOR SPECIAL MEETING OF STOCKHOLDERS -- MAY 10, 1996

                  SOLICITED ON BEHALF OF THE BOARD OF DIRECTORS

    The undersigned  stockholder(s) of Groundwater Technology,  Inc., a Delaware
corporation,  revoking all prior proxies,  hereby  appoints Walter C. Barber and
Allan S. Bufferd and each of them, proxies,  with full power of substitution, to
vote all of the shares of common stock of Groundwater  Technology,  Inc.,  which
the  undersigned is entitled to vote at the Special  Meeting of  Stockholders of
Groundwater  Technology,  Inc. to be held at the Courtyard  Marriott,  300 River
Ridge Drive,  Norwood,  Massachusetts  on Friday,  May 10, 1996,  at 9:30 a.m.,
local time, and at any adjournment or adjournments  thereof, as set forth on the
reverse side and, in their discretion, upon any other business that may properly
come before the meeting.  Attendance  of the  undersigned  at the meeting or any
adjournment  session  thereof will not be deemed to revoke this proxy unless the
undersigned  shall  affirmatively  indicate the intention of the  undersigned to
vote said shares in person.
    
    IF NO DIRECTION IS GIVEN, THIS PROXY WILL BE VOTED FOR THE PROPOSAL.

    PLEASE VOTE,  DATE,  AND SIGN ON OTHER SIDE AND RETURN  PROMPTLY IN ENCLOSED
ENVELOPE.

    Please  sign this  proxy  exactly  as your name  appears on the books of the
Company.   Joint  owners  should  each  sign  personally.   Trustees  and  other
fiduciaries should indicate the capacity in which they sign, and where more than
one name appears, a majority must sign. If a corporation,  this signature should
be that of an authorized officer who should state his or her title.

HAS YOUR ADDRESS CHANGED?             DO YOU HAVE ANY COMMENTS? 
_______________________________       _________________________________

_______________________________       _________________________________

_______________________________       _________________________________
                                                           
DETACH CARD

<PAGE>

[X] PLEASE MARK VOTES
    AS IN THIS EXAMPLE 

    1.)  Proposal  to approve  and adopt the  transactions  contemplated  by the
Investment Agreement by and among Fluor Daniel, Inc., Fluor Daniel Environmental
Services,  Inc., Groundwater  Technology,  Inc. and GTI Acquisition  Corporation
dated as of December 11, 1995, as amended,  which shall constitute your approval
of the Amended and Restated  Certificate  of  Incorporation,  amendments  to the
By-Laws, the issuance of New Common Stock to Fluor Daniel, Inc., the election of
Directors and the treatment and  disposition  of  outstanding  stock options and
rights under, and certain amendments to, Groundwater Technology, Inc.'s existing
stock plans in connection with the transactions.

                               FOR   AGAINST   ABSTAIN
                               [ ]    [ ]       [ ]
RECORD DATE SHARES: 

    2.) To transact such other  business as may properly come before the meeting
and any adjournment thereof.



                                           
  

Please be sure to sign and date this Proxy.                         Date 

Stockholder sign here                      Co-owner sign here

 

    Mark box at right if comments  or address  change have been noted on reverse
side of this card.    [   ]

DETACH CARD                                                          DETACH CARD


                          GROUNDWATER TECHNOLOGY, INC.

Dear Stockholder:

Please take note of the important  information  enclosed with this Proxy Ballot.
There are a number of issues  related to the  management  and  operation of your
Company that require your immediate attention and approval.  These are discussed
in detail in the enclosed proxy materials.

Your vote counts, and you are strongly encouraged to exercise your right to vote
your shares.

Please  mark the boxes on the proxy card to indicate  how your  shares  shall be
voted.  Then sign the card, detach it and return your proxy vote in the enclosed
postage paid envelope.

Your vote must be received  prior to the Special  Meeting of  Stockholders,  May
10, 1996.

Thank you in advance for your prompt consideration of these matters.

Sincerely,


Groundwater Technology, Inc.



<PAGE>

PART II.  INFORMATION NOT REQUIRED IN THE PROXY STATEMENT/PROSPECTUS

ITEM 20.  INDEMNIFICATION OF DIRECTORS AND OFFICERS

         The Company's  Restated  Certificate  of  Incorporation  eliminates the
personal  liability  of directors  for monetary  damages for breach of fiduciary
duty as a director  other than  liability  for (i) any breach of the  director's
duty of loyalty to the Company,  (ii) for acts or omissions not in good faith or
which involve  intentional  misconduct or a knowing violation of law, (iii) acts
covered by Section  174 of the General  Corporation  Law of Delaware or (iv) for
any transaction from which such director derived an improper  personal  benefit.
In general,  under the Company's  By-Laws directors and officers are indemnified
for  liabilities  and expenses  they may incur with respect to actions  taken in
their  capacities  as a director or officer,  so long as such  actions are taken
good faith in a manner reasonably believed to be in, or not opposed to, the best
interests  of  the  Company,  and,  with  respect  to  any  criminal  action  or
proceeding,  actions that such  director or officer had no  reasonable  cause to
believe  were  unlawful.  The stated  intent of the  indemnification  provisions
contained in the By-Laws is to provide for indemnification to the fullest extent
permitted by Section 145 of the General Corporation Law of Delaware as in effect
from time to time. These provisions remain unchanged in the Amended and Restated
Certificate of  Incorporation  and the Amended By-Laws as described in the Proxy
Statement/Prospectus included in this Registration Statement on S-4.

         The Company has obtained  directors' and officers'  liability insurance
for the benefit of its officers and directors.

ITEM 21.  EXHIBITS AND FINANCIAL STATEMENT SCHEDULES

         (a)      Exhibits

         The  following  exhibits are filed  pursuant to Item 601 of  Regulation
S-K.

Exhibit No.        Description

2.1                Investment  Agreement by and among Fluor Daniel,  Inc., Fluor
                   Daniel Environmental Services,  Inc., Groundwater Technology,
                   Inc. and GTI Acquisition Corporation dated as of December 11,
                   1995. (Previously filed as Exhibit 2.1 to Quarterly Report on
                   Form  10-Q  for  the  quarter  ended  January  27,  1996  and
                   incorporated herein by reference.)

2.2                Agreement of Amendment by and among Fluor Daniel, Inc., Fluor
                   Daniel Environmental Services,  Inc., Groundwater Technology,
                   Inc. and GTI  Acquisition  Corporation  dated as of March 29,
                   1996.

5.1                Legal Opinion of Testa, Hurwitz & Thibeault.



                                      II-1
<PAGE>

23.1               Consent  of Ernst & Young,  LLP re  financial  statements  of
                   Groundwater Technology, Inc.

23.2               Consent  of Ernst & Young,  LLP re  financial  statements  of
                   Fluor Daniel Environmental Services, Inc.

23.3               Consent of Testa, Hurwitz & Thibeault (included in Exhibit 5)

24.1               Power of Attorney (see Page II-4)

ITEM 22.  UNDERTAKINGS

         (a) The undersigned Registrant hereby undertakes, that, for purposes of
determining  any liability  under the Securities Act of 1933, each filing of the
Registrant's  annual report pursuant to Section 13(a) or 15(d) of the Securities
Exchange Act of 1934 (and, where applicable,  each filing of an employee benefit
plan's annul report pursuant to Section 15(d) of the Securities  Exchange Act of
1934) that is incorporated by reference in the  Registration  Statement shall be
deemed to be a new  registration  statement  relating to the securities  offered
therein,  and the offering of such securities at that time shall be deemed to be
the initial bona fide offering thereof.

         (b) The undersigned Registrant hereby undertakes as follows: that prior
to any public reoffering of the securities registered hereunder through use of a
prospectus  which is a part of this  Registration  Statement,  by any  person or
party who is deemed to be an underwriter  within the meaning of Rule 145(c), the
issuer  undertakes that such reoffering  prospectus will contain the information
called for by the  applicable  registration  form with respect to reofferings by
persons who may be deemed  underwriters,  in addition to the information  called
for by the other items of the applicable form.

         (c) The Registrant  undertakes that every  prospectus (i) that is filed
pursuant to paragraph (c) immediately  preceding,  or (ii) that purports to meet
the  requirements of Section  10(a)(3) of the Securities Act of 1933 and is used
in connection with an offering of securities  subject to Rule 415, will be filed
as a part of an amendment  to the  Registration  Statement  and will not be used
until such amendment is effective,  and that,  for purposes of  determining  any
liability under the Securities Act of 1933, each such  post-effective  amendment
shall be deemed to be a new  registration  statement  relating to the securities
offered  therein,  and the  offering  of such  securities  at that time shall be
deemed to be the initial bona fide offering thereof.

         (d)  Insofar  as  indemnification  for  liabilities  arising  under the
Securities Act of 1933 may be permitted to directors,  officers and  controlling
persons of the Registrant  pursuant to the foregoing  provisions,  or otherwise,
the  Registrant  has been  advised  that in the  opinion of the  Securities  and
Exchange  Commission such  indemnification is against public policy as expressed
in the Securities  Act of 1933 and is,  therefore,  unenforceable.  In the event
that a claim of indemnification against such liabilities (other than the payment
by the  Registrant  of  expenses  incurred  or paid by a  director,  officer  or
controlling  person of the Registrant in the  successful  defense of any action,
suit or proceeding) is asserted by such director,  officer or controlling

                                      II-2

<PAGE>

person in connection with the securities being registered,  the Registrant will,
unless in the opinion of its counsel the matter has been settled by  controlling
precedent,  submit to a court of appropriate  jurisdiction  the question whether
such  indemnification by it is against public policy as expressed in the Act and
will be governed by the final adjudication of such issue.

         (e) The undersigned Registrant hereby undertakes to respond to requests
for   information   that  is   incorporated   by   reference   into  the   Proxy
Statement/Prospectus  pursuant to Items 4, 10(b), 11 or 13 of this form,  within
one  business  day of  receipt  of such  request,  and to send the  incorporated
documents  by first class mail or other  equally  prompt  means.  This  includes
information contained in documents filed subsequent to the effective date of the
Registration Statement through the date of responding to the request.

         (f) The undersigned  Registrant hereby undertakes to supply by means of
a  post-effective  amendment all information  concerning a transaction,  and the
company  being  acquired  involved  therein,  that  was not the  subject  of and
included in the Registration Statement when it became effective.

                                      II-3
<PAGE>



                                   SIGNATURES

         Pursuant  to the  requirements  of the  Securities  Act  of  1933,  the
Registrant  has duly  caused  this  registration  statement  to be signed on its
behalf by the undersigned,  thereunto duly authorized, in Norwood, Massachusetts
on April 4, 1996.


                                  GROUNDWATER TECHNOLOGY, INC.



                                  By: /s/ Walter C. Barber
                                     -----------------------------------
                                     Walter C. Barber
                                     Chairman of the Board of Directors,
                                     President and
                                     Chief Executive Officer


                        POWER OF ATTORNEY AND SIGNATURES

         We, the undersigned  officers and directors of Groundwater  Technology,
Inc.,  hereby  severally  constitute  and appoint  Walter C.  Barber,  Robert E.
Sliney, Jr. and Brian D. Goldstein,  Esq., and each of them singly, our true and
lawful  attorneys with full power to them, and each of them singly,  to sign for
us  and  in our  names  in the  capacities  indicated  below,  the  Registration
Statement  on  Form  S-4  filed  herewith  and any  and  all  pre-effective  and
post-effective  amendments to said Registration  Statement,  and generally to do
all such things in our names and on our behalf in our capacities as officers and
directors to enable Groundwater  Technology,  Inc. to comply with the provisions
of the  Securities  Act  of  1933,  as  amended,  and  all  requirements  of the
Securities  and  Exchange  Commission,   hereby  ratifying  and  confirming  our
signatures as they may be signed by our said attorneys,  or any of them, to said
Registration Statement and any and all amendments thereto.

         PURSUANT  TO THE  REQUIREMENTS  OF THE  SECURITIES  ACT OF  1933,  THIS
REGISTRATION  STATEMENT  HAS  BEEN  SIGNED  BY  THE  FOLLOWING  PERSONS  IN  THE
CAPACITIES AND ON THE DATES INDICATED.
<TABLE>
<CAPTION>
        SIGNATURE                                           TITLE(S)                               DATE
<S>                                         <C>                                               <C>    
/s/ Walter C. Barber                         Chairman of the Board of Directors and            April 4, 1996
- ---------------------------------            President and Chief Executive Officer
Walter C. Barber                             (Principal Executive Officer)

/s/ Robert E. Sliney, Jr.                    Vice President, Treasurer and Chief Financial     April 4, 1996
- ---------------------------------            Officer (Principal Financial and Accounting
Robert E. Sliney, Jr.                        Officer)

/s/ Allan S. Bufferd                         Director                                          April 4, 1996
- ---------------------------------
Allan S. Bufferd
</TABLE>


                                      II-4
<PAGE>

<TABLE>
<S>                                        <C>

/s/ Bayard Henry                             Director                                          April 4, 1996
- ---------------------------------
Bayard Henry


/s/ Robert P. Schechter                      Director                                          April 4, 1996
- ---------------------------------
Robert P. Schechter

</TABLE>


                                      II-5



                          AGREEMENT OF AMENDMENT

    AGREEMENT  OF  AMENDMENT  dated  March  29,  1996 by and  among  Groundwater
Technology,  Inc.,  a Delaware  corporation  (the  "Company"),  GTI  Acquisition
Corporation,  a  California  corporation  and a wholly owned  subsidiary  of the
Company ("Newco"),  Fluor Daniel, Inc., a California  corporation  ("Holdings"),
and Fluor Daniel Environmental  Services,  Inc., a California  corporation and a
wholly owned subsidiary of Holdings ("FDESI").

    WHEREAS,  the Company,  Newco,  Holdings and FDESI entered into that certain
Investment Agreement dated as of December 11, 1995 (the "Investment  Agreement")
pursuant  to  which,   among   other   things,   the   Company   will  effect  a
recapitalization of its capital stock, FDESI will be merged with and into Newco,
and Holdings will receive certain shares of capital stock of the Company; and

    WHEREAS,  the parties desire to amend the Investment  Agreement as set forth
below;

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

    1. That the fifth "whereas" clause be amended and restated to read in
its entirety as follows:

       "WHEREAS, to emphasize the close relationship of Holdings and the Company
       after  the  Merger at the  completion  of the  transactions  contemplated
       hereby,  upon consummation of such transactions,  the Company will change
       its name to 'Fluor Daniel GTI, Inc.' (the "Name Change");

    2. That  subclause (ii) of Section 1.1 be amended to read in its entirety as
follows:

       "(ii) the name of the Company will be changed to 'Fluor Daniel
       GTI, Inc.'"

    3. That clause (ii) of subsection (c) of Section 1.3 be amended and restated
to read in its entirety as follows:

       "(ii) the average of the closing price of the New Common Stock on
       the NASDAQ National Market for the five trading days immediately
       following the Closing Date."

    4. That the second sentence of Section 5.7 be amended and restated to
read in its entirety as follows:

       "Promptly after the Closing Date (but effective as of the Closing Date of
       the Merger),  each of the Employee  Stock Options  outstanding  under the
       Company's  1987 Stock  Plan and each of the  outstanding  Director  Stock
       Options  shall be canceled,  and the holder  thereof  shall  receive,  in
       exchange  therefore,  a  substitute  option  (an  "Adjusted  Option")  to
       purchase  a number of shares of New Common  Stock  equal to the number of
       shares of Old Common Stock subject to such canceled option  multiplied by
       the Adjustment Fraction (as defined below), at a per share exercise price
       equal to the per share exercise price of such canceled option  multiplied
       by a fraction equal to one divided by the Adjustment Fraction."

    5. That clause (iii) of the last paragraph of Section 6.3 be amended
and restated to read in its entirety as follows:

       "(iii) an officer, director, employee, principal stockholder,  consultant
       or partner of a person  that is a  competitor  of  Holdings or any of its
       Affiliates (unless agreed to in writing by Holdings) or of the Company or
       any of its Affiliates (unless agreed to in writing by the Company)."

    6. That the  references  to April 30, 1996  contained in  subsections  (ii),
(vi), (vii) and (viii) of Section 9.1 be amended to read May 31, 1996.

    Capitalized  terms not  otherwise  defined  herein  shall have the  meanings
ascribed to them in the Investment Agreement

    This Agreement of Amendment may be executed in  counterparts,  each of which
shall constitute an original, but all of which together shall constitute one and
the same instrument.

    Except as amended  herein,  the  Investment  Agreement  shall remain in full
force and effect.

                                      A-71
<PAGE>

    IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be duly
executed by their respective  authorized  officers as of the date and year first
above written.

                                            GROUNDWATER TECHNOLOGY, INC.

                                            By: /s/ WALTER C. BARBER
                                               --------------------------------
                                               Name: Walter C. Barber
                                               Title: President

                                            GTI ACQUISITION CORPORATION

                                            By: /s/ WALTER C. BARBER
                                               --------------------------------
                                               Name: Walter C. Barber
                                               Title: President

                                            FLUOR DANIEL, INC.

                                            By:    /s/ D.L. MYERS
                                               --------------------------------
                                               Name: D.L. Myers
                                               Title: President

                                            FLUOR DANIEL ENVIRONMENTAL
                                             SERVICES, INC.

                                            By:    /s/ D.L. MYERS
                                               --------------------------------
                                               Name: D.L. Myers
                                               Title: President

                   [LETTERHEAD OF TESTA, HURWITZ & THIBEAULT]

                                                                   April 4, 1996





Groundwater Technology, Inc.
100 River Ridge Drive
Norwood, MA  02062

         RE:      Groundwater Technology, Inc.
                  Registration Statement on Form S-4

Ladies and Gentlemen:

     We have represented  Groundwater  Technology,  Inc., a Delaware corporation
(the "Company"),  in connection with the preparation and filing of the Company's
Registration  Statement on Form S-4 (the "Registration  Statement") covering the
issuance of shares of Common Stock,  par value $.001 per share (the "Shares") of
the  Company to its  stockholders  in a  recapitalization  of the Company and to
Fluor Daniel, Inc., a California  corporation ("Fluor") in respect of the merger
of GTI  Acquisition  Corporation,  a  wholly  owned  subsidiary  of the  Company
("Newco")  with and into Fluor  Daniel  Environmental  Services,  Inc., a wholly
owned  subsidiary  of  Fluor  ("FDESI")  pursuant  to  that  certain  Investment
Agreement  dated  as of  December  11,  1995  by  and  among  the  Company,  GTI
Acquisition  Corporation,  Fluor  Daniel,  Inc. and Fluor  Daniel  Environmental
Services,  Inc., as amended by that certain  Agreement of Amendment  dated March
29, 1996 by and among the Company,  GTI Acquisition  Corporation,  Fluor Daniel,
Inc. and Fluor Daniel Environmental Services, Inc. (the "Investment Agreement"),
all as more fully described in the  Registration  Statement.  Unless the context
otherwise  requires,  all capitalized  terms used herein shall have the meanings
ascribed  to them in the  Proxy  Statement/Prospectus  constituting  part of the
Registration Statement (the "Proxy Statement/Prospectus").

     We have reviewed the corporate  proceedings taken by the Board of Directors
of the Company with respect to the  authorization and issuance of the Shares. We
have also examined and relied upon  originals or copies,  certified or otherwise
authenticated  to  our  satisfaction,   of  all  corporate  records,  documents,
agreements or other instruments of the Company and have made all  investigations
of law and have discussed with the Company's officers all questions of fact that
we have deemed necessary or appropriate.

     For purposes of each of the opinions  expressed  below, we have assumed (i)
the   effectiveness  of  the   Registration   Statement  and  the  issuance  and
distribution  of the  Shares as  contemplated  by the  Investment  Agreement  as
described  by  the  Proxy   Statement/Prospectus,


<PAGE>

(ii) the approval of the Transactions by the stockholders of the Company,  (iii)
the effective filing of the Amended and Restated Certificate of Incorporation of
the Company and (iv) the effective filing of a certificate of merger intended to
effect the merger of Newco with and into FDESI.

     Based upon and subject to the  foregoing,  we are of the  opinion  that the
Shares shall have been duly  authorized  and, when issued in accordance with the
Amended  and  Restated  Certificate  of  Incorporation  and  the  terms  of  the
Investment Agreement as described in the Registration Statement, will be validly
issued, fully paid and nonassessable.

     We hereby  consent  to the filing of this  opinion  as  Exhibit  5.1 to the
Registration   Statement  and  to  the  reference  to  our  firm  in  the  Proxy
Statement/Prospectus  contained in the Registration  Statement under the caption
"Legal Matters."

                                                  Very truly yours,


                                                  /s/ TESTA, HURWITZ & THIBEAULT

                                                  TESTA, HURWITZ & THIBEAULT






                               Exhibit 23.1

                      Consent of Independent Auditors

We consent to the  reference  to our firm under the  capition  "Experts"  in the
Proxy Statement/Prospectus of Groundwater Technology,  Inc. that is made part of
the Registration  Statement (Form S-4) of Groundwater  Technology,  Inc. for the
registration of 8,076,347 shares of its common stock and to the incorporation by
reference  therein  of our  report  dated  May 26,  1995,  with  respect  to the
consolidated financial statements of Groundwater Technology,Inc. incorporated by
reference in its Annual Report (Form 10-K) for the year ended April 29, 1995 and
the  related  financial  statement  schedule  included  therein,  filed with the
Securities and Exchange Commission.

                                      /s/ Ernst & Young LLP

                                          ERNST & YOUNG LLP 


Boston, Massachusetts
April 2, 1996






                                Exhibit 23.2

                      Consent of Independent Auditors

We consent to the reference to our firm under the  caption  "Experts" and to the
use of our report  dated  December  22,  1995,  with  respect  to the  financial
statements of Fluor Daniel  Environmental  Services,  Inc. included in the Proxy
Statement of Groundwater Technology,  Inc. that is made part of the Registration
Statement  (Form S-4) and  Prospectus of  Groundwater  Technology,  Inc. for the
registration of new shares of its common stock.

                                      /s/ Ernst & Young LLP

                                          ERNST & YOUNG LLP 
                                          

Orange County, California
April 1, 1996



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