SECURITIES AND EXCHANGE COMMISSION
                              WASHINGTON, DC 20549

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

                                    FORM 10-K
   (mark one)
   [ X ] Annual Report Pursuant to Section 13 or 15(d) of the Securities
         Exchange Act of 1934 for the fiscal year ended March 30, 1996

   [   ] Transition Report Pursuant to Section 13 or 15(d) of the Securities
         Exchange Act of 1934

                          Commission file number 1-9549

                              THERMO TERRATECH INC.
             (Exact name of Registrant as specified in its charter)

   Delaware                                                         04-2925807
   (State or other jurisdiction of                            (I.R.S. Employer
   incorporation or organization)                          Identification No.)

   81 Wyman Street, P.O. Box 9046
   Waltham, Massachusetts                                           02254-9046
   (Address of principal executive offices)                         (Zip Code)
       Registrant's telephone number, including area code: (617) 622-1000

           Securities registered pursuant to Section 12(b) of the Act:

                                                   Name of each exchange 
            Title of each class                     on which registered
        ----------------------------              -----------------------
        Common Stock, $.10 par value              American Stock Exchange

           Securities registered pursuant to Section 12(g) of the Act:
                                      None

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

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

   The aggregate market value of the voting stock held by nonaffiliates of the
   Registrant as of May 24, 1996, was approximately $41,619,000.

   As of May 24, 1996, the Registrant had 17,647,504 shares of Common Stock
   outstanding.

                       DOCUMENTS INCORPORATED BY REFERENCE

   Portions of the Registrant's Fiscal 1996 Annual Report to Shareholders for
   the year ended March 30, 1996, are incorporated by reference into Parts I
   and II.

   Portions of the Registrant's definitive Proxy Statement for the Annual
   Meeting of Shareholders to be held on September 25, 1996, are incorporated
   by reference into Part III.
PAGE

                                      PART I

  Item 1. Business

   (a) General Development of Business.

       Thermo TerraTech Inc. (the Company or the Registrant, formerly
  Thermo Process Systems Inc.) is a provider of environmental services and
  infrastructure planning and design services, encompassing a range of
  specializations within the consulting and design, remediation and
  recycling, and laboratory-testing industries. The Company also provides
  metal-treating services and thermal-processing systems used to treat
  primary metals and metal parts.

       The Company offers engineering, consulting, and design services in
  the areas of municipal and industrial water quality management; bridge
  and highway construction and reconstruction; and natural resource
  management. While each of its consulting and design subsidiaries
  separately offers its services to public- and private-sector clients,
  they are also able to combine their strengths to provide clients with
  joint solutions to their engineering, consulting, and design problems.

       The Company is a leading national provider of contaminated
  soil-remediation services and a leading regional supplier of fluids-
  remediation services. The Company also provides consulting and
  environmental management services, and is a major supplier of nuclear-
  remediation and safety services at radioactively contaminated sites. The
  Company's majority-owned, publicly held Thermo Remediation Inc. (Thermo
  Remediation) subsidiary, a national leader in the design and operation of
  nonhazardous soil-remediation facilities, operates a network of such
  facilities serving customers in more than a dozen states along the East
  and West Coasts. In December 1995, Thermo Remediation acquired
  Remediation Technologies, Inc. (ReTec), a provider of consulting,
  engineering, and on-site services to help clients manage problems
  associated with environmental compliance, waste management, and the
  remediation of industrial sites contaminated with organic wastes and
  residues. The purchase price for ReTec of $29.7 million consisted of
  $18.5 million in cash, shares of Thermo Remediation common stock and
  warrants valued at $3.7 million, and approximately $7.5 million
  attributable to the conversion of outstanding ReTec stock options into
  Thermo Remediation stock options of equivalent intrinsic value at the
  date of the acquisition. Thermo Remediation's Thermo Nutech division also
  provides services to remove radioactive contaminants from sand, gravel,
  and soil, as well as health physics services, radiochemistry laboratory,
  and dosimetry services. Thermo Remediation's Thermo Fluids subsidiary
  collects, tests, processes, and recycles used motor oil and other
  industrial oils. As of March 30, 1996, the Company owned 65.9% of Thermo
  Remediation's common stock and holds a $2,650,000 principal amount 3 7/8%
  subordinated convertible note due 2000 issued by Thermo Remediation,
  convertible into shares of Thermo Remediation common stock at a
  conversion price of $9.83 per share.

       The Company's majority-owned Thermo EuroTech N.V. (formerly
  Beheersmaatschappij J. Amerika N.V.) subsidiary is a provider of
  fluids-recycling and other environmental services in the Netherlands. As
  of March 30, 1996, the Company owned 62% of the outstanding common stock
  of Thermo EuroTech.
                                        2PAGE

       The Company's Thermo Analytical subsidiary operates a network of
  analytical laboratories that provide comprehensive laboratory-based
  environmental testing, analysis, and related services to detect and
  measure organic contaminants in samples of soil, water, air, industrial
  wastes, mixed wastes, and biological materials. In May 1995, the Company
  acquired substantially all of the assets of Lancaster Laboratories, Inc.
  and its affiliate Clewmark Holdings (collectively Lancaster Laboratories)
  for $25.3 million in cash, which included the repayment of $5.3 million
  of debt. Lancaster Laboratories, based in Lancaster, Pennsylvania, is a
  provider of high-quality analytical services to the environmental, food,
  and pharmaceutical industries.

       The Company performs metallurgical processing services using
  thermal-treatment equipment at locations in California and Minnesota. The
  Company also designs, manufactures, and installs computer-controlled,
  custom-engineered, thermal-processing systems used to treat primary metal
  and metal parts.

       Effective April 2, 1995, the Company and Thermo Instrument Systems
  Inc. (Thermo Instrument) agreed to dissolve their environmental services
  joint venture (the joint venture). The Company purchased the businesses
  formerly operated by the joint venture from Thermo Instrument for $34.3
  million in cash. To finance this transaction, the Company issued to
  Thermo Electron Corporation (Thermo Electron) a $35.0 million promissory
  note that bears interest at the 90-day Commercial Paper Composite Rate
  plus 25 basis points, set at the beginning of each quarter, and is due
  May 13, 1997. In June 1995, the Company transferred three businesses
  formerly operated by the joint venture, collectively known as Thermo
  Nutech, to Thermo Remediation in exchange for 1,583,360 shares of Thermo
  Remediation common stock.

       The Company was incorporated on May 30, 1986, as an indirect, wholly
  owned subsidiary of Thermo Electron. Prior to its incorporation, the
  Company's operations were conducted by two wholly owned subsidiaries of
  Thermo Electron. As of March 30, 1996, Thermo Electron owned 14,501,958
  shares of the common stock of the Company, representing 83% of such stock
  then outstanding. Thermo Electron is a world leader in environmental
  monitoring and analysis instruments and a manufacturer of biomedical
  products including heart-assist systems and mammography systems;
  papermaking and recycling equipment; alternative-energy systems;
  industrial process equipment; and other specialized products. Thermo
  Electron also conducts advanced technology research and development.

       Thermo Electron has announced that it may repurchase shares of the
  Company's common stock from time to time in the open market or in
  negotiated transactions. During fiscal 19961, Thermo Electron purchased
  576,700 shares of the Company's common stock in the open market for a
  total price of $7,419,000.



  1 References to fiscal 1996, 1995, and 1994 herein are for the fiscal
    years ended March 30, 1996, April 1, 1995, and April 2, 1994,
    respectively.
                                        3PAGE

  (b)  Financial Information About Industry Segments.

       The Company conducts business in one segment, environmental
  services. Within this segment, the principal products and services are:
  consulting and design, remediation and recycling services and 
  laboratory-based testing. The Company also provides specialized 
  metal-treating services including the design, manufacture, and 
  installation of advanced custom-engineered thermal-processing systems.

  (c)  Description of Business.

       (i) Principal Services and Products

  Consulting and Design Services

       The Company provides a wide range of environmental consulting
  services to private- and public-sector clients. These services include
  the design and inspection of water supply and wastewater treatment
  facilities; investigations of different methods to clean up hazardous
  waste sites; assistance in obtaining government permits;
  transportation-related and similar types of infrastructure engineering,
  survey, and land-use planning; and support services which include
  mechanical, electrical, and structural engineering. In addition, the
  Company provides natural resource management services including
  environmental impact studies.

       The Company is a leading provider of comprehensive environmental
  consulting and professional engineering services in selected areas of the
  United States. Through the February 1995 acquisition of Elson T. Killam
  Associates (Killam Associates), the Company is a leader in the design,
  planning, and construction supervision of municipal and privately owned
  water treatment plants, waste treatment plants, and hazardous wastewater
  facilities. The Company specializes in full-service contract operations
  to plant owners in the public and private sectors. These services
  facilitate regulatory compliance; optimize day-to-day plant operations;
  reduce costs; provide competent, experienced personnel; and promote good
  community relations.

       The Company provides a broad range of bridge and highway engineering
  services through its Bettigole Andrews & Clark subsidiary.

       The Company's Normandeau Associates subsidiary's environmental
  impact assessments and mitigation/restoration studies help determine
  water quality, promote the safety of wildlife, and assist clients in
  meeting environmental permitting and licensing requirements. Normandeau
  Associates is a leading provider of aquatic biology expertise and
  ecological risk assessment to electric utility plants throughout the
  country.

       The market for the Company's environmental analysis and field
  services consists primarily of customers who need to comply with federal,
  state, and local regulations that relate to environmental protection, the
  management and treatment of hazardous wastes, and the need to upgrade and
  expand infrastructure in response to economic development. These
  customers typically rely on independent laboratories and environmental
  science and engineering consultants, such as the Company's, for ongoing
  analysis and monitoring of such wastes and direction for compliance with
  various environmental regulations.
                                        4PAGE

       A substantial portion of the Company's consulting and design
  services sales are made to existing customers on a repeat basis.
  Consulting and design services are often performed as multi-year studies.
  In addition to federal, state, and local governments, customers include
  public utilities, consulting and construction engineers, waste management
  companies, oil refineries, mining companies, chemical manufacturers,
  architectural and engineering firms, and a variety of service companies
  involved with real estate transactions.

       During fiscal 1996, 1995, and 1994, the Company derived revenues of
  $74.0 million, $40.3 million, and $29.7 million, respectively, from
  consulting and design services.

  Remediation and Recycling Services

       The Company is a leading national provider of contaminated
  soil-remediation services and a leading regional supplier of
  fluids-remediation services. The Company also provides consulting and
  environmental management services, and is a major supplier of nuclear
  remediation and safety services at radioactively contaminated sites.

       The Company's Thermo Remediation subsidiary, a national leader in
  the design and operation of nonhazardous soil-remediation facilities,
  operates a network of such facilities serving customers in more than a
  dozen states along the East and West coasts. Headquartered in Florida,
  Thermo Remediation operates fully permitted, environmentally secure
  soil-remediation centers in California, Florida, Maryland, New York,
  Oregon, South Carolina, Virginia, and Washington. Thermo Remediation
  thermally treats soil to remove and destroy hydrocarbon contamination
  caused by leaking underground storage tanks, aboveground storage tanks,
  spills accumulated at manufactured-gas plants and refineries, and other
  sources. The Company's strategy is to compete by providing its customers
  with protection from environmental liabilities under federal, state, and
  local law and superior service at competitive prices. Customers,
  particularly large national accounts, choose Thermo Remediation's
  services rather than those of other remediation companies and landfills
  because of Thermo Remediation's stringent pre-screening and documentation
  procedures, state-of-the-art facilities, thorough processing technology,
  post-treatment certification, and affiliation with Thermo Electron.
  Accordingly, the majority of Thermo Remediation's revenues are derived
  from larger liability-conscious companies, including the major oil
  companies and their affiliated service stations, public utilities, large
  industrial companies, and car rental companies, as well as the federal
  government, the military, and certain municipal governments and agencies.

       The Company and Thermo Electron entered into a development agreement
  under which Thermo Electron funded $4.0 million of the direct and
  indirect costs of the Company's development of soil-remediation centers.
  In exchange for this funding, the Company granted Thermo Electron a
  royalty equal to approximately 3% of net revenues from soil-remediation
  services performed at the centers developed under the agreement. The
  Company recorded contract revenues of $776,000 under the agreement for
  development costs expended in fiscal 1994. As of October 2, 1993, funding
  under the agreement was complete. The Company paid royalties of $332,000,
  $432,000, and $351,000 in fiscal 1996, 1995, and, 1994, respectively, to
  Thermo Electron.
                                        5PAGE

       In December 1995, Thermo Remediation acquired ReTec, a provider of
  consulting, engineering, and on-site services to help clients manage
  problems associated with environmental compliance, waste management, and
  the remediation of industrial sites contaminated with organic wastes and
  residues. ReTec provides particular expertise in managing wastes from
  manufactured-gas plants, refineries, and railroad properties. As a leader
  in the application of bioremediation technologies, with 17 offices
  located in 16 states, ReTec was the first firm to successfully employ
  bioremediation as the principal technology to clean up a Superfund site.
  In addition, ReTec offers a broad array of remedial solutions, all of
  which are applied from a risk management perspective. ReTec concentrates
  on providing its clients with low-cost and innovative solutions to
  complex problems. For example, ReTec has led successful brownfield
  redevelopment projects that have helped transform contaminated properties
  into productive assets.

       Thermo Remediation's Thermo Nutech division also provides services
  to remove radioactive contaminants from sand, gravel, and soil, as well
  as health physics services, radiochemistry laboratory, and dosimetry
  services. Over the past 30 years, Thermo Nutech's health physics group
  has conducted hundreds of radiological surveys of soil contaminated with
  low levels of radioactivity. To reduce the high cost of cleanup and
  disposal, Thermo Nutech is developing a range of automated, technology-
  based services for radioactive soil remediation, some of which are based
  on proprietary technologies. For example, the Company's segmented-gate
  system automatically assays and separates radioactively contaminated soil
  from uncontaminated soil. This technology has been used to remediate more
  than 100,000 tons of plutonium-contaminiated soil on Johnston Atoll under
  an ongoing contract with the Nuclear Defense Agency, as well as to
  process soils at the DOE's Savannah River site. Thermo Nutech also
  provides health physics and industrial hygiene services in support of
  environmental investigation and remediation projects, including site
  surveys for radioactive materials and on-site sampling and analysis in
  support of radiological decontamination programs, and operates
  radiochemistry laboratories that provide a range of analytical laboratory
  services to the nuclear utility and environmental industries. The
  Company's Thermo Nutech division has been negatively affected by reduced
  federal spending on remediation of nuclear sites.

       The Company, through its Thermo Fluids subsidiary, collects, tests,
  processes, and recycles used motor oil and other industrial oils. In
  addition, the Company collects and recycles oily water and oil filters.
  Thermo Fluids has collection facilities located in Phoenix and Tucson,
  Arizona, and Las Vegas, Nevada. From these sites, Thermo Fluids operates
  a fleet of oil and water collection trucks to pick up waste oils and oily
  water.

       The Company's majority-owned Thermo EuroTech subsidiary, located in
  the Netherlands, provides wastewater treatment services as well as
  services to test, remove, and install underground storage tanks. In March
  1995, Thermo EuroTech acquired Refining and Trading B.V. Conducting
  business under the name "North Refinery," the Company specializes in
  processing "off-spec" mixtures of oil that contain water, ash, and
  sediment into commercially tradable end products used in blending.
  Although a large percentage of North Refinery's oil feedstock has
  historically come from the former Soviet Union, the volume of oil
  received from that nation has dropped significantly as a result of
  political and economic changes that make transportation of waste oil
                                        6PAGE

  difficult. To overcome this loss of supply, North Refinery has taken
  steps to diversify its feedstock suppliers. However, no assurance can be
  given that it will not experience future disruptions in deliveries. The
  recent grant of a chemical-waste permit for the processing of a special
  classification of oil-contaminated liquids has also allowed North
  Refinery to begin processing chemical-waste streams. The end products of
  this process are commercial grade oils that can be blended to make diesel
  fuels and marine fuels or be used as a feed material. The Company's
  strategy is to use Thermo EuroTech as a platform from which to eventually
  provide a broad range of environmental remediation services throughout
  Western Europe.

       During fiscal 1996, 1995, and 1994, the Company derived revenues, of
  $77.0 million, $58.2 million, and $48.7 million, respectively, from its
  remediation and recycling services.

  Laboratory-testing Services

       Through a network of facilities in the United States, the Company
  provides comprehensive laboratory-based services for the environmental,
  pharmaceutical, and food industries. These laboratories also provide
  analysis and related services to detect and measure hazardous wastes and
  radioactive materials. Each of the laboratories in the Company's network
  has developed specializations, and samples obtained by one laboratory can
  be shipped to the specialists in the network for analysis, enabling the
  network to provide a full complement of analytical and testing services.

       Analytical laboratory services consist of a comprehensive range of
  analytical tests to detect and measure organic contaminants, inorganic
  contaminants, and radioactive materials in samples of soil, water, air,
  industrial wastes, and biological materials. The Company has established
  detailed procedures and strict operating standards to ensure consistent
  performance and to allow it to participate in the Environmental
  Protection Agency's (EPA's) Contract Laboratory Program (CLP). The EPA,
  through the CLP, solicits bids on a competitive basis from commercial
  laboratories to perform testing and analysis. The Company's environmental
  laboratory business has been negatively affected by reduced federal
  spending on environmental testing.

       Through the May 1995 acquisition of Lancaster Laboratories, the
  Company is a high-quality provider of analytical services to the
  environmental, food, and pharmaceutical industries. The Company believes
  that Lancaster Laboratories is the largest single-site commercial
  analytical laboratory in the country. Due to its size and national
  reputation for quality, Lancaster Laboratories has benefited from the
  growing trend of pharmaceutical and food manufactures to outsource their
  analytical laboratory functions to single-source providers.

       During fiscal 1996, 1995, and 1994, the Company derived revenues of
  $34.6 million, $8.6 million, and $6.0 million, respectively, from its
  laboratory-testing services.


                                        7PAGE

  Metal-treating Services and Process Systems

       The Company performs metallurgical processing services using
  thermal-treatment equipment at locations in California and Minnesota.
  Through its equipment division located in Michigan, the Company also
  designs, manufactures, and installs computer-controlled, custom-
  engineered, thermal-processing systems used to treat primary metals and
  metal parts.

       During fiscal 1996, 1995, and 1994, the Company derived revenues of
  $31.8 million, $26.7 million, and $25.7 million, respectively, from its
  metal-treating services.

       (ii) New Products

       The Company has made no commitments to new products that would
  require the investment of a material amount of the Company's assets.

       (iii) Raw Materials

       A large percentage of North Refinery's oil feedstock has
  historically come from the former Soviet Union. The volume of oil
  received from that nation has dropped significantly as a result of
  political and economic changes that make transportation of waste oil
  difficult. To overcome this loss of supply, North Refinery has taken
  steps to diversify its feedstock suppliers. However, no assurance can be
  given that it will not experience future disruptions in deliveries.

       The principal materials used by the Company in its manufacturing
  operations are fabricated steel, alloy castings, and ceramic and
  insulating refractory materials. To date, the Company has not experienced
  any difficulty in obtaining any of the materials or components used in
  its operations and does not foresee any such difficulty in the future.
  The Company has multiple sources for all of its significant raw material
  needs.

       (iv) Patents, Licenses, and Trademarks

       The Company currently owns or has rights under licenses to a number
  of U.S. patents. Although the Company believes that patent protection
  provides it with competitive advantages with respect to certain portions
  of its business and will continue to seek patent protection when
  appropriate, the Company also believes that its business depends
  primarily upon trade secrets and the technical and marketing expertise of
  its personnel.

       (v) Seasonal Influences

       While the Company conducts significant operations year-round, the
  majority of its businesses experience seasonal fluctuations due to
  adverse weather during winter months. Such seasonal influences may have a
  material effect on the Company's revenues. The Company experienced
  significant adverse weather during the fourth quarter of fiscal 1996.
                                        8PAGE

       (vi) Working Capital Requirements

       In general, there are no special inventory requirements or credit
  terms extended to customers that would have a material adverse effect on
  the Company's working capital.

       (vii) Dependency on a Single Customer

       The Company derived 10%, 6%, and 16% of its total revenues in fiscal
  1996, 1995, and 1994, respectively, from contracts or subcontracts with
  the federal government.

       (viii) Backlog

       The Company's backlog of firm orders was $95,419,000 and $70,589,000
  as of March 30, 1996 and April 1, 1995, respectively. These amounts
  include the backlog of the Company's ReTec subsidiary and backlog from
  consulting and design services, laboratory testing services, and process-
  systems products. Soil-recycling and metallurgical services are provided
  on a current basis pursuant to purchase orders. Accordingly, there is no
  backlog for these services. The process-systems backlog includes the
  incomplete portion of equipment contracts that are accounted for using
  the percentage-of-completion method. Of the fiscal 1996 backlog amount,
  substantially all orders are expected to be filled within the current
  fiscal year.

       (ix) Government Contracts

       Approximately 10%, 6%, and 16% of the Company's revenues in fiscal
  1996, 1995, and 1994, respectively, were derived from contracts or
  subcontracts with the federal government that are subject to
  renegotiation of profits or termination. The Company does not have any
  knowledge of threatened or pending renegotiation or termination of any
  material contract or subcontract.

       (x) Competition

  Consulting and Design Services

       The Company's consulting and design businesses are engaged in highly
  competitive markets in all of its service areas. These markets tend to be
  regional. In its geographic service area, competition consists of small
  one- to three-person firms offering a limited scope of services, as well
  as much larger firms that may be regional, national, or international in
  the scope of services they offer. The principal competitive factors for
  the Company are: reputation; experience; breadth and quality of services
  offered; and technical, managerial, and business proficiency.

  Remediation and Recycling Services

       The Company's competition for soil-remediation services is primarily
  from other fixed-site thermal treatment facilities and from landfills.
  The Company is aware of two other companies that operate fixed-site,
  thermal-treatment facilities for soil remediation in multiple states.
  However, several large waste management companies are analyzing this
  market and may compete with the Company in the future. The market for
  petroleum-contaminated, soil-processing services is highly fragmented and
  limited to geographic area within several hundred miles of a site. The
                                        9PAGE

  Company also competes with operators of mobile thermal-treatment
  facilities, bioremediation and vapor-extraction technologies and, in
  certain states, with asphalt plants and brick kilns that use the
  contaminated soil in their production processes. The Company competes
  primarily based on its ability to offer its customers superior protection
  from environmental liabilities. Many of the Company's largest customers,
  such as the major oil companies, are extremely sensitive to environmental
  liability and therefore conduct thorough environmental audits of
  soil-treatment facilities before qualifying them as approved facilities.
  These approvals constitute an important barrier to entry into this
  segment of the soil-remediation market. Although the Company typically
  prices its services at a premium over landfills and other treatment
  technologies, competitive conditions limit the prices charged by the
  Company in each local market. Pricing is therefore a major competitive
  factor for the Company.

       Each of ReTec's offices is engaged in highly competitive, regional
  markets. ReTec's competition consists of numerous small firms offering
  limited services, as well as much larger firms that offer an array of
  services. The principal competitive factors for ReTec are: reputation;
  experience; breadth and quality of services offered; and technical,
  managerial and business proficiency.

       Thermo Nutech faces competition from many large national
  competitors, and competes primarily on the basis of its proprietary
  technology and price.

       Thermo Fluids operates the largest fleet of collection vehicles in
  Arizona and Nevada. Thermo Fluids competes with numerous smaller and
  several larger national companies in its current markets.

       Thermo EuroTech faces competition for oil from other oil processors
  and blenders and from a company with a similar distillation technology in
  Italy. The market for blending oils is very large and oils such as Thermo
  EuroTech's end products represent a very small percentage of the total
  market.

  Laboratory-testing Services

       Hundreds of independent analytical testing laboratories and
  consulting firms compete for environmental services business nationwide.
  Many of these firms use equipment and processes similar to those of the
  Company. Competition is based not only on price, but also on reputation
  for accuracy, quality, and the ability to respond rapidly to customer
  requirements. In addition, many industrial companies have their own
  in-house analytical testing capabilities. The Company believes that its
  competitive strength lies in the quality and expertise of its services.

  Metal-treating Services and Process Systems

       The market for metal-treating services is typically regional and
  very competitive. Both regions in which the Company has facilities
  contain numerous competitors. In addition, in-house heat-treating
  facilities provide a major source of competition. The Company competes in
  this segment on the basis of services provided, turnaround time, and
  price.
                                       10PAGE

       The market for thermal-processing systems is subject to intense
  competition worldwide. The Company is aware of at least eight companies
  that market a number of products comparable to the Company's, but
  competition for particular projects is typically limited to fewer
  companies. The Company competes on the basis of several factors,
  including technical performance, product quality and reliability, timely
  delivery, and often price. Certain products sold by the Company's
  competitors are less expensive than comparable products sold by the
  Company.

       (xi) Environmental Protection Regulations

       The Company believes that compliance by the Company with federal,
  state, and local environmental protection regulations will not have a
  material adverse effect on its capital expenditures, earnings, or
  competitive position.

       (xii) Number of Employees

       At March 30, 1996, the Company employed 2,367 persons.

  (d)  Financial Information About Exports by Domestic Operations and About
       Foreign Operations.

       The Company's exports by domestic operations and foreign operations
  are currently insignificant.

  (e)  Executive Officers of the Registrant.

                               Present Title
  Name                    Age  (Year First Became Executive Officer)
  ----------------------  ---  --------------------------------------------

  Dr. John P. Appleton    61   President and Chief Executive Officer (1993)
  John N. Hatsopoulos     61   Vice President and Chief Financial Officer
                                 (1988)
  Jeffrey L. Powell       37   Vice President (1994)
  Bruce J. Taunt          45   Vice President, Finance and Administration 
                                 (1994)
  Paul F. Kelleher        53   Chief Accounting Officer (1986)
  Emil C. Herkert         58   Vice President (May 1996)

       Each executive officer serves until his successor is chosen or
  appointed by the Board of Directors and qualified or until earlier
  resignation, death, or removal. All executive officers except Dr.
  Appleton, Mr. Powell, Mr. Taunt, and Mr. Herkert have held comparable
  positions for at least five years, either with the Company or with its
  parent company, Thermo Electron. Dr. Appleton has served as a Vice
  President of Thermo Electron since 1975 in various managerial capacities.
  Mr. Powell has been President of Thermo Remediation since January 1991.
  From March 1989 until January 1991, Mr. Powell was Vice President, Sales
  and Marketing, of Thermo Remediation. He has also served as Chief
  Operating Officer since December 1993. Mr. Taunt has been Vice President
  of Finance and Administration at the Company since 1992. Prior to joining
  the Company, Mr. Taunt was Vice President and Controller of the Cross
                                       11PAGE

  Company (an international manufacturer of specialized machine tools), a
  subsidiary of Cross and Trecker. Mr. Herkert has served as President of
  the Company's Killam Associates subsidiary since 1977. Messrs.
  Hatsopoulos and Kelleher are full-time employees of Thermo Electron, but
  devote such time to the affairs of the Company as the Company's needs
  reasonably require.


  Item 2. Properties

       The location and general character of the Company's principal
  properties as of March 30, 1996, are as follows:

       The Company owns approximately 324,000 square feet of office,
  engineering, laboratory, production, and manufacturing space, principally
  in Massachusetts, Minnesota, New Jersey, New Mexico, California, and
  Pennsylvania, and leases approximately 805,000 square feet of office,
  engineering, laboratory, production, and manufacturing space, pursuant to
  leases expiring in fiscal 1997 through 2008, principally in California,
  Michigan, Massachusetts, Connecticut, South Carolina, Florida, Texas,
  Montana, North Carolina, Colorado, Louisiana, Washington, Minnesota,
  Indiana, Kansas, Ohio, Tennessee, New Jersey, New Mexico, New York,
  Pennsylvania, New Hampshire, Maine, and Vermont.

       The Company also owns approximately 96 acres primarily in
  California, Florida, Oregon, South Carolina, and Maryland, from which it
  provides soil-remediation services. The Company occupies approximately 22
  acres principally in South Carolina, Virginia, Washington, California,
  and New York, pursuant to leases expiring in fiscal 1998 through 2005,
  from which it provides soil-remediation services.

       The Company occupies approximately eight acres on two sites in
  Arizona and one site in Nevada, pursuant to leases expiring in fiscal
  1997 and 1998, consisting of office space, fluids-recycling and
  maintenance facilities, and sites from fluids storage tanks.

       The Company occupies approximately 15 acres in Delfzijl, Holland,
  pursuant to leases expiring in 1998 through 2059, consisting of office
  space, distillation facilities, and oil storage tanks.

       The Company believes that these facilities are in good condition and
  are adequate for its present operations and that other suitable space is
  readily available if any of such leases are not extended.








                                       12PAGE

  Item 3. Legal Proceedings

       In February 1996, the Company settled its previously disclosed
  litigation with Recycling Sciences International, Inc. on terms that were
  not material to the Company's results of operations or financial
  condition.

       The Company has been notified that the EPA has determined that a
  release or a substantial threat of a release of a hazardous substance, as
  defined in the Comprehensive Environmental Response Compensation and
  Liability Act of 1980 (CERCLA) occurred at several sites to which
  chemical or other wastes generated by the manufacturing operations of the
  Company were sent. These notifications allege that the Company may be a
  potentially responsible party with respect to the remedial actions needed
  to control or clean up any such releases. Under CERCLA, responsible
  parties can include current and previous owners of the site, generators
  of hazardous substances disposed of at the site, and transporters of
  hazardous substances to the site. Each responsible party can be jointly
  and severally liable, without regard to fault or negligence, for all
  costs associated with the remediation of the site. In each instance the
  Company believes that it is only one of several companies which received
  such notification and who may likewise be held liable for any such
  remedial costs.

       The Company evaluates its potential liability as a responsible party
  for this environmental matter on an ongoing basis based upon factors such
  as the estimated remediation costs, the nature and duration of the
  Company's involvement with the site, the financial strength of other
  potentially responsible parties, and the availability of indemnification
  from previous owners of acquired businesses. Estimated liabilities are
  accrued in accordance with Statement of Financial Accounting Standards
  No. 5, "Accounting for Contingencies." To date, the Company has not
  incurred any significant liability with respect to this site and the
  Company anticipates that future liabilities related to any site with
  which the Company is currently involved will not have a materially
  adverse effect on the Company's business, results of operations, or
  financial condition.


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

       Not applicable.









                                       13PAGE

                                   PART II


  Item 5. Market for Registrant's Common Equity and Related Shareholder
          Matters

       Information concerning the market and market price for the
  Registrant's Common Stock, $.10 par value, and dividend policy is
  included under the sections labeled "Common Stock Market Information" and
  "Dividend Policy" in the Registrant's Fiscal 1996 Annual Report to
  Shareholders and is incorporated herein by reference.


  Item 6. Selected Financial Data

       The information required under this item is included under the
  sections "Selected Financial Information" and "Dividend Policy" in the
  Registrant's Fiscal 1996 Annual Report to Shareholders and is
  incorporated herein by reference.


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

       The information required under this item is included under the
  heading "Management's Discussion and Analysis of Financial Condition and
  Results of Operations" in the Registrant's Fiscal 1996 Annual Report to
  Shareholders and is incorporated herein by reference.


  Item 8. Financial Statements and Supplementary Data

       The Registrant's Consolidated Financial Statements as of March 30,
  1996, are included in the Registrant's Fiscal 1996 Annual Report to
  Shareholders and are incorporated herein by reference.


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

       Not applicable.








                                       14PAGE

                                   PART III


  Item 10. Directors and Executive Officers of the Registrant

       The information concerning Directors required under this item is
  incorporated herein by reference from the material contained under the
  caption "Election of Directors" in the Registrant's definitive proxy
  statement to be filed with the Securities and Exchange Commission
  pursuant to Regulation 14A, not later than 120 days after the close of
  the fiscal year. The information concerning delinquent filers pursuant to
  Item 405 of Regulation S-K is incorporated herein by reference from the
  material contained under the heading "Disclosure of Certain Late Filings"
  under the caption "Stock Ownership" in the Registrant's definitive proxy
  statement to be filed with the Securities and Exchange Commission
  pursuant to Regulation 14A, not later than 120 days after the close of
  the fiscal year.


  Item 11. Executive Compensation

       The information required under this item is incorporated herein by
  reference from the material contained under the caption "Executive
  Compensation" in the Registrant's definitive proxy statement to be filed
  with the Securities and Exchange Commission pursuant to Regulation 14A,
  not later than 120 days after the close of the fiscal year.


  Item 12. Security Ownership of Certain Beneficial Owners and Management

       The information required under this item is incorporated herein by
  reference from the material contained under the caption "Stock Ownership"
  in the Registrant's definitive proxy statement to be filed with the
  Securities and Exchange Commission pursuant to Regulation 14A, not later
  than 120 days after the close of the fiscal year.


  Item 13. Certain Relationships and Related Transactions

       The information required under this item is incorporated herein by
  reference from the material contained under the caption "Relationship
  with Affiliates" in the Registrant's definitive proxy statement to be
  filed with the Securities and Exchange Commission pursuant to Regulation
  14A, not later than 120 days after the close of the fiscal year.








                                       15PAGE

                                   PART IV


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

  (a,d)    Financial Statements and Schedules.

           (1) The consolidated financial statements set forth in the list
               below are filed as part of this Report.

           (2) The consolidated financial statement schedule set forth in
               the list below is filed as part of this Report.

           (3) Exhibits filed herewith or incorporated herein by reference
               are set forth in Item 14(c) below.


           List of Financial Statements and Schedules Referenced in this
           Item 14.

           Information incorporated by reference from Exhibit 13 filed
           herewith:

             Consolidated Statement of Income
             Consolidated Balance Sheet
             Consolidated Statement of Cash Flows
             Consolidated Statement of Shareholders' Investment
             Notes to Consolidated Financial Statements
             Report of Independent Public Accountants

           Certain Financial Statement Schedules filed herewith:

            Schedule II: Valuation and Qualifying Accounts

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

  (b)      Reports on Form 8-K.

           None.

  (c)      Exhibits.

           See Exhibit Index on the page immediately preceding exhibits.







                                       16PAGE

                                  SIGNATURES


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

  Date: May 31, 1996                   THERMO TERRATECH INC.


                                       By: John P. Appleton
                                           --------------------
                                           John P. Appleton
                                           President and
                                           Chief Executive Officer

       Pursuant to the requirements of the Securities Exchange Act of 1934,
  this report has been signed below by the following persons on behalf of
  the Registrant and in the capacities indicated, as of May 31, 1996.

  Signature                        Title
  ---------                        -----


  By: John P. Appleton             President, Chief Executive Officer,
      ----------------------         and Director
      John P. Appleton             


  By: John N. Hatsopoulos          Vice President, Chief Financial Officer,
      ----------------------         and Director
      John N. Hatsopoulos          


  By: Paul F. Kelleher             Chief Accounting Officer
      ----------------------
      Paul F. Kelleher


  By: William A. Rainville         Chairman of the Board and Director
      ----------------------
      William A. Rainville


  By: Donald E. Noble              Director
      ----------------------
      Donald E. Noble


  By: Paul E. Tsongas              Director
      ----------------------
      Paul E. Tsongas


  By: Polyvios C. Vintiadis        Director
      ----------------------
      Polyvios C. Vintiadis
                                       17PAGE

                   Report of Independent Public Accountants


  To the Shareholders and Board of Directors of Thermo TerraTech Inc.:

       We have audited in accordance with generally accepted auditing
  standards, the consolidated financial statements included in Thermo
  TerraTech Inc.'s Annual Report to Shareholders incorporated by reference
  in this Form 10-K, and have issued our report thereon dated May 7, 1996
  (except with respect to the matters discussed in Note 16 as to which the
  date is May 8, 1996). Our audits were made for the purpose of forming an
  opinion on those statements taken as a whole. The schedule listed in Item
  14 on page 16 is the responsibility of the Company's management and is
  presented for purposes of complying with the Securities and Exchange
  Commission's rules and is not part of the basic consolidated financial
  statements. This schedule has been subjected to the auditing procedures
  applied in the audits of the basic consolidated financial statements and,
  in our opinion, fairly states in all material respects the consolidated
  financial data required to be set forth therein in relation to the basic
  consolidated financial statements taken as a whole.



                                          Arthur Andersen LLP



  Boston, Massachusetts
  May 7, 1996


















                                       18PAGE

   SCHEDULE II


                              THERMO TERRATECH INC.

                        VALUATION AND QUALIFYING ACCOUNTS

                                 (In thousands)


                     Balance   Charged
   Allowance              at  to Costs             Accounts            Balance
   for Doubtful    Beginning       and   Accounts  Written-             at End
   Accounts          of Year  Expenses  Recovered       off   Other(a) of Year
   --------------  ---------  --------  --------- ---------  --------- -------

   Year Ended:

   March 30, 1996    $ 3,560   $    73  $    84     $(1,628)  $   748  $ 2,837

   April 1, 1995     $ 3,260   $   162  $  (579)    $    88   $   629  $ 3,560

   April 2, 1994     $ 3,073   $   424  $  (381)    $    79   $    65  $ 3,260


   (a) Includes allowances of businesses acquired during the year as
       described in Note 3 to Consolidated Financial Statements in the
       Registrant's fiscal 1996 Annual Report to Shareholders and the effect
       of foreign currency translation.
























                                     19PAGE

                                  EXHIBIT INDEX
   Exhibit
   Number    Reference                                                   Page
   --------------------------------------------------------------------------
     3.1     Restated Certificate of Incorporation, as amended (filed as
             Exhibit 99 to the Registrant's Registration Statement on
             Form S-2 [Registration No. 333-02269] and incorporated
             herein by reference).

     3.2     Bylaws of the Registrant (filed as Exhibit 3(b) to the
             Registrant's Annual Report on Form 10-K for the fiscal year
             ended April 2, 1988 [File No. 1-9549] and incorporated
             herein by reference).

     4.1     Fiscal Agency Agreement dated August 4, 1989, among the
             Registrant, Thermo Electron Corporation, and Chemical Bank,
             as fiscal agent (filed as Exhibit B to the Registrant's
             Current Report on Form 8-K relating to the events occurring
             on August 4, 1989 [File No. 1-9549] and incorporated herein
             by reference).

     4.2     Fiscal Agency Agreement dated as of May 2, 1996, among the
             Registrant, Thermo Electron Corporation, and Chemical Bank,
             as Fiscal Agent.

             The Registrant hereby agrees, pursuant to Item
             601(b)(4)(iii)(A) of Regulation S-K, to furnish to the
             Commission upon request, a copy of each other instrument
             with respect to other long-term debt of the Company or its
             subsidiaries.

    10.1     Thermo Electron Corporate Charter as amended and restated
             effective January 3, 1993 (filed as Exhibit 10(a) to the
             Registrant's Annual Report on Form 10-K for the fiscal year
             ended April 3, 1993 [File No. 1-9549] and incorporated
             herein by reference).

    10.2     Amended and Restated Corporate Services Agreement dated
             January 3, 1993, between Thermo Electron Corporation and
             the Registrant (filed as Exhibit 10(b) to the Registrant's
             Annual Report on Form 10-K for the fiscal year ended April
             3, 1993 [File No. 1-9549] and incorporated herein by
             reference).

    10.3     Agreement of Lease dated December 31, 1985, between
             Claridge Properties Ltd. and Thermo Electron Corporation
             (filed as Exhibit 10(c) to the Registrant's Registration
             Statement on Form S-1 [Reg. No. 33-6763] and incorporated
             herein by reference).

    10.4     Assignment of Lease dated December 31, 1985, between Thermo
             Electron Corporation and TMO, Inc. (filed as Exhibit 10(d)
             to the Registrant's Registration Statement on Form S-1
             [Reg. No. 33-6763] and incorporated herein by reference).

    10.5     Sublease dated March 30, 1986, between TMO, Inc. and
             Holcroft/Loftus, Inc. (filed as Exhibit 10(e) to the
             Registrant's Registration Statement on Form S-1 [Reg. No.
             33-6763] and incorporated herein by reference).
                                       20PAGE

                                  EXHIBIT INDEX
   Exhibit
   Number    Reference                                                   Page
   --------------------------------------------------------------------------
    10.6     Lease Amending Agreement dated January 1, 1995, between
             Claridge Properties Ltd., Thermo Electron Corporation and
             TMO, Inc. (filed as Exhibit 10.6 to the Registrant's Annual
             Report on Form 10-K [File No. 1-9549] and incorporated by
             reference). 

    10.7     Exclusive License and Marketing Agreement dated March 22,
             1990, among TPS Technologies Inc., Holcroft Inc., and
             Thermo Soil Recyclers Inc. (filed as Exhibit 10(q) to the
             Registrant's Annual Report on Form 10-K for the fiscal year
             ended March 30, 1990 [File No. 1-9549] and incorporated
             herein by reference).

    10.8     Form of Indemnification Agreement with Directors and
             Officers (filed as Exhibit 10(k) to the Registrant's Annual
             Report on Form 10-K for the fiscal year ended March 30,
             1991 [File No. 1-9549] and incorporated herein by
             reference).

    10.9     Development Agreement dated September 15, 1991, between
             Thermo Electron Corporation and the Registrant (filed as
             Exhibit 10(l) to the Registrant's Quarterly Report on Form
             10-Q for the fiscal quarter ended September 28, 1991 [File
             No. 1-9549] and incorporated herein by reference).

    10.10    Amended and Restated Development Agreement dated January 2,
             1992, between Thermo Electron Corporation and the
             Registrant (filed as Exhibit 10(m) to the Registrant's
             Annual Report on Form 10-K for the fiscal year ended March
             28, 1992 [File No. 1-9549] and incorporated herein by
             reference).

    10.11    Asset Transfer Agreement dated as of October 1, 1993 among
             the Registrant, TPS Technologies Inc. and Thermo
             Remediation Inc. (filed as Exhibit 2.3 to Thermo
             Remediation's Registration Statement on Form S-1 [Reg. No.
             33-70544] and incorporated herein by reference).

    10.12    Exclusive License Agreement dated as of October 1, 1993
             among the Registrant, TPS Technologies Inc. and Thermo
             Remediation Inc. (filed as Exhibit 2.4 to Thermo 
             Remediation's Registration Statement on Form S-1 [Reg. No.
             33-70544] and incorporated herein by reference).

    10.13    Non-Competition and Non-Disclosure Agreement dated as of
             October 1, 1993 among the Registrant, TPS Technologies Inc.
             and Thermo Remediation Inc. (filed as Exhibit 2.5 to Thermo
             Remediation's Registration Statement on Form S-1 [Reg. No.
             33-70544] and incorporated herein by reference).

    10.14    Tax Allocation Agreement dated as of June 1, 1992 between
             the Registrant and Thermo Remediation Inc. (filed as
             Exhibit 10.3 to Thermo Remediation's Registration Statement
             on Form S-1 [Reg. No. 33-70544] and incorporated herein by
             reference).
                                       21PAGE

                                  EXHIBIT INDEX
   Exhibit
   Number    Reference                                                   Page
   --------------------------------------------------------------------------
    10.15    Agreement of Partnership dated May 16, 1994 among Terra
             Tech Labs Inc. (a wholly owned subsidiary of the
             Registrant) and Eberline Analytical Corporation, Skinner &
             Sherman, Inc., TMA/NORCAL Inc., Normandeau Associates Inc.,
             Bettigole Andrews & Clark Inc., Fellows, Read & Associates
             Inc. and Thermo Consulting Engineers Inc. (each a wholly
             owned subsidiary of Thermo Instrument Systems Inc.) (filed
             as Exhibit 1 to the Registrant's Current Report on Form 8-K
             relating to the events occurring on May 16, 1994 [File No.
             1-9549] and incorporated herein by reference).

    10.16    Promissory Note dated May 16, 1994 issued by the Registrant
             to Thermo Electron Corporation (filed as Exhibit 2 to the
             Registrant's Current Report on Form 8-K relating to the
             events occurring on May 16, 1994 [File No. 1-9549] and
             incorporated herein by reference).

    10.17    Agreement of Dissolution of Partnership dated May 9, 1995
             among Thermo Terra Tech (the Partnership), Terra Tech Labs,
             Inc. (a wholly owned subsidiary of the Registrant) and
             Eberline Analytical Corporation, Skinner & Sherman, Inc.,
             TMA/NORCAL Inc., Normandeau Associates Inc., Bettigole
             Andrews & Clark Inc., Fellows, Read & Associates Inc. and
             Thermo Consulting Engineers Inc. (each a wholly owned
             subsidiary of Thermo Instrument Systems Inc.) (filed as
             Exhibit 2.1 to the Registrant's Current Report on Form 8-K
             relating to the events occurring on May 9, 1995 [File No.
             1-9549] and incorporated herein by reference).

    10.18    Stock Purchase Agreement dated May 9, 1995 between the
             Registrant and Thermo Instrument Systems Inc. (filed as
             Exhibit 2.2 to the Registrant's Current Report on Form 8-K
             relating to the events occurring on May 9, 1995 [File No.
             1-9549] and incorporated herein by reference).

    10.19    Note dated May 17, 1995 from the Registrant to Thermo
             Electron Corporation (filed as Exhibit 2.3 to the
             Registrant's Current Report on Form 8-K relating to the
             events occurring on May 9, 1995 [File No. 1-9549] and
             incorporated herein by reference).

    10.20    Stock Purchase and Note Issuance Agreement dated as of
             November 22, 1993, between the Registrant and Thermo
             Remediation Inc. (filed as Exhibit 10.11 to Thermo
             Remediation's Registration Statement on Form S-1 [Reg. No.
             33-70544] and incorporated herein by reference).

    10.21    $2,650,000 principal amount Subordinated Convertible Note
             dated as of November 22, 1993, made by Thermo Remediation
             Inc., issued to the Registrant (filed as Exhibit 10.12 to
             Thermo Remediation's Registration Statement on Form S-1
             [Reg. No. 33-70544] and incorporated herein by reference).

                                       22PAGE

                                  EXHIBIT INDEX
   Exhibit
   Number    Reference                                                   Page
   --------------------------------------------------------------------------
    10.22    Asset Purchase Agreement dated as of November 19, 1993 by
             and among All Western Oil, Inc. and certain affiliates
             thereof and Thermo Fluids Inc. (filed as Exhibit 10.13 to
             Thermo Remediation's Registration Statement on Form S-1
             [Reg. No. 33-70544] and incorporated herein by reference).

    10.23    First Addendum to Asset Purchase Agreement dated as of
             August 7, 1994 among All Western Oil, Inc. et al. and
             Thermo Fluids Inc. (filed as Exhibit 10.1 to Thermo
             Remediation's Quarterly Report on Form 10-Q for the fiscal
             quarter ended October 1, 1994 [File No. 1-12636] and
             incorporated herein by reference).

    10.24    Promissory Note in the principal amount of $700,000, dated
             August 7, 1994 (filed as Exhibit 10.2 to Thermo
             Remediation's Quarterly Report on Form 10-Q for the fiscal
             quarter ended October 1, 1994 [File No. 1-12636] and
             incorporated herein by reference).

    10.25    Security Agreement dated as of August 7, 1994 among All
             Western Oil, Inc. et al. and Thermo Fluids Inc. (filed as
             Exhibit 10.3 to Thermo Remediation's Quarterly Report on
             Form 10-Q for the fiscal quarter ended October 1, 1994
             [File No. 1-12636] and incorporated herein by reference).

    10.26    Stock Purchase and Sale Agreement made and entered into on
             February 6, 1995, to be effective as of January 29, 1995,
             by and between Nord Est S.A., the Registrant, and Emil C.
             Herkert, Kenneth L. Zippler, Franklin O. Williamson, Jr.,
             Fletcher N. Platt, Jr., Eugene J. Destefano, Meint Olthof
             and Stanley P. Kaltnecker, Jr. (filed as Exhibit 1 to the
             Registrant's Current Report on Form 8-K relating to the
             events occurring on February 6, 1995 [File No. 1-9549] and
             incorporated herein by reference).

    10.27    Agreement and Plan of Merger dated as of June 28, 1995, by
             and among the Registrant, Eberline Acquisition Inc., Thermo
             Remediation Inc. and Eberline Holdings Inc. (filed as
             Appendix B to Thermo Remediation's Proxy Statement for the
             Annual Meeting held on December 13, 1995 [File No. 1-12636]
             and incorporated herein by reference).

    10.28    $28,000,000 Secured Promissory Note dated as of January 29,
             1995 issued by the Registrant to Nord Est S.A. (filed as
             Exhibit 2 to the Registrant's Current Report on Form 8-K
             relating to the events occurring on February 6, 1995 [File
             No. 1-9549] and incorporated herein by reference).

    10.29    $38,000,000 Promissory Note dated as of February 21, 1995
             issued by the Registrant to Thermo Electron Corporation
             (filed as Exhibit 3 to the Registrant's Current Report on
             Form 8-K relating to the events occurring on February 6,
             1995 [File No. 1-9549] and incorporated herein by
             reference).
                                       23PAGE

                                  EXHIBIT INDEX
   Exhibit
   Number    Reference                                                   Page
   --------------------------------------------------------------------------
    10.30    Asset Purchase Agreement by and among Thermo Analytical
             Inc. (as Buyer); Lancaster Laboratories, Inc. and Clewmark
             Holdings (as Sellers); and Earl H. Hess, Anita F. Hess,
             Kenneth E. Hess, J. Wilson Hershey and Carol D. Hess (as
             the principal owners of Sellers) (filed as Exhibit 1 to the
             Registrant's Current Report on Form 8-K relating to the
             events occurring on May 10, 1995 [File No. 1-9549] and
             incorporated herein by reference).

    10.31    Agreement and Plan of Merger dated as of the first day of
             December, 1995, by and among Thermo Remediation Inc., TRI
             Acquisition Inc. and Remediation Technologies, Inc. (filed
             as Exhibit 2(a) to the Registrant's Current Report on Form
             8-K relating to the events occurring on December 8, 1995
             [File No. 1-9549] and incorporated herein by reference).

    10.32    Purchase and Sale Agreement dated as of December 20, 1994
             by and among TPS Technologies Inc., TPST Soil Recyclers of
             Maryland Inc., Rafich Corporation, Harry Ratrie, John C.
             Cyphers and J. Thomas Hood (filed as Exhibit 1 to Thermo
             Remediation's Current Report on Form 8-K for the events
             occurring on December 21, 1994 [File No. 1-12636] and
             incorporated herein by reference).

    10.33    Stock Purchase Agreement entered into on March 29, 1995, by
             and among Stalt Holding, B.V., Beheersmaatschappij J.
             Amerika N.V., A.J. Van Es, J.B. Van Es and D.A. Slager, and
             the Registrant (filed as Exhibit 1 to the Registrant's
             Current Report on Form 8-K relating to the events occurring
             on March 29, 1995 [File No. 1-9549] and incorporated herein
             by reference).

    10.34    Master Repurchase Agreement dated January 1, 1994 between
             the Registrant and Thermo Electron Corporation (filed as
             Exhibit 10.21 to the Registrant's Annual Report on Form
             10-K for the fiscal year ended April 2, 1994 [File No.
             1-9549] and incorporated herein by reference).

    10.35    Master Reimbursement Agreement dated January 1, 1994
             between the Registrant, Thermo Electron Corporation, and
             Thermo Remediation Inc. (filed as Exhibit 10.22 to the
             Registrant's Annual Report on Form 10-K for the fiscal year
             ended April 2, 1994 [File No. 1-9549] and incorporated
             herein by reference).

    10.36    Incentive Stock Option Plan of the Registrant (filed as
             Exhibit 10(h) to the Registrant's Registration Statement on
             Form S-1 [Reg. No. 33-6763] and incorporated herein by
             reference). (Maximum number of shares issuable in the
             aggregate under this plan and the Registrant's Nonqualified
             Stock Option Plan is 1,850,000 shares, after adjustment to
             reflect share increases approved in 1987, 1989 and 1992,
             6-for-5 stock splits effected in July 1988 and March 1989,
             and 3-for-2 stock split effected in September 1989).
                                       24PAGE

                                  EXHIBIT INDEX
   Exhibit
   Number    Reference                                                   Page
   --------------------------------------------------------------------------
    10.37    Nonqualified Stock Option Plan of the Registrant (filed as
             Exhibit 10(i) to the Registrant's Registration Statement on
             Form S-1 [Reg. No. 33-6763] and incorporated herein by
             reference). (Maximum number of shares issuable in the
             aggregate under this plan and the Registrant's Incentive
             Stock Option Plan is 1,850,000 shares, after adjustment to
             reflect share increases approved in 1987, 1989 and 1992,
             6-for-5 stock splits effected in July 1988 and March 1989,
             and 3-for-2 stock split effected in September 1989).

    10.38    Deferred Compensation Plan for Directors of the Registrant
             (filed as Exhibit 10(k) to the Registrant's Registration
             Statement on Form S-1 [Reg. No. 33-6763] and incorporated
             herein by reference).

    10.39    Equity Incentive Plan (filed as Exhibit 10.63 to Thermedics
             Inc.'s Annual Report on Form 10-K for the fiscal year ended
             January 1, 1994 [File No. 1-9567] and incorporated herein
             by reference) (Maximum number of shares issuable is
             1,750,000 shares, after adjustment to reflect share
             increase approved in 1994).

    10.40    Directors Stock Option Plan, as amended and restated
             effective January 1, 1995 (filed as Exhibit 10.39 to the
             Registrant's Annual Report on Form 10-K for the fiscal year
             ended April 1, 1995 [File No. 1-9549] and incorporated
             herein by reference).

    10.41    Severance Agreement with Thomas P. Plunkett dated August
             31, 1993 (filed as Exhibit 10(aa) to the Registrant's
             Quarterly Report on Form 10-Q for the fiscal quarter ended
             October 2, 1993 [File No. 1-9549] and incorporated herein
             by reference).

    10.42    Thermo TerraTech Inc. (formerly Thermo Process Systems
             Inc.)- Thermo Remediation Inc. Nonqualified Stock Option
             Plan (filed as Exhibit 10(l) to the Registrant's Quarterly
             Report on Form 10-Q for the fiscal quarter ended January 1,
             1994 [File No. 1-9549] and incorporated herein by
             reference).

    10.43    Thermo Remediation Inc. Equity Incentive Plan (filed as
             Exhibit 10.7 to Thermo Remediation's Registration Statement
             on Form S-1 [Reg. No. 33-70544] and incorporated herein by
             reference).

    11       Computation re: Earnings per share.

    13       Annual Report to Shareholders for the fiscal year ended
             March 30, 1996 (only those portions incorporated herein by
             reference).

    21       Subsidiaries of the Registrant.

    23       Consent of Arthur Andersen LLP.
                                       25PAGE

                                  EXHIBIT INDEX
   Exhibit
   Number    Reference                                                   Page
   --------------------------------------------------------------------------
    27        Financial Data Schedule.