EXHIBIT 21
THERMO TERRATECH INC.
SUBSIDIARIES OF THE REGISTRANT
At May 24, 1996, Thermo TerraTech Inc. owned the following companies:
State or Registrant's
Jurisdiction % of
Name Incorporation Ownership
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Holcroft (Canada) Limited Canada 100%
Holcroft Corporation Delaware 100%
Holcroft GmbH Germany 100%
Metallurgical, Inc. Minnesota 100%
Cal-Doran Metallurgical Services, Inc. California 100%
Normandeau Associates, Inc. New Hampshire 100%
Thermo Analytical Inc. Delaware 100%
Skinner & Sherman, Inc. Massachusetts 100%
Thermo Consulting & Design Inc. Delaware 100%
Engineering Technology and Knowledge
Corporation Delaware 100%
Elson T. Killam Associates, Inc. New Jersey 100%
Bettigole Andrews Clark & Killam
Associates Inc. New York 100%
N.H. Bettigole Co., Inc. Delaware 100%
N.H. Bettigole, P.A. New Jersey 100%
N.H. Bettigole, P.C. New York 100%
Duncan, Lagnese and Associates,
Incorporated Pennsylvania 100%
E3-Killam, Inc. New York 100%
Killam Associates, Inc. Ohio 100%
Killam Management and Operational
Services, Inc. New Jersey 100%
Fellows, Read & Associates, Inc. New Jersey 100%
Killam Associates, New England Inc. Delaware 100%
George A. Schock & Associates, Inc. New Jersey 100%
Jennison Engineering, Inc. Vermont 100%
Thermo EuroTech N.V. Netherlands 62.27%
Amerika Tankinstallaties B.V. Netherlands 100%
Grond-& Watersaneringstechniek
Nederland B.V. Netherlands 100%
High-Tech Trouble-Shooters B.V. Netherlands 100%
Jac. Amerika en Zonen B.V. Netherlands 100%
Refining & Trading Holland B.V. Netherlands 100%
Thermo Remediation Inc. Delaware 65.85%
Eberline Holdings Inc. Delaware 100%
Eberline Analytical Corporation New Mexico 100%
Thermo Hanford Inc. Delaware 100%
TMA/NORCAL Inc. California 100%
Remediation Technologies, Inc. Delaware 100%
RETEC Thermal, Inc. Delaware 100%
ReTec/Tetra L.C. Texas 50%*
Thermo Fluids Inc. Delaware 100%
TPS Technologies Inc. Florida 100%
TPST Soil Recyclers of California Inc. California 100%
California Hydrocarbon, Inc. Nevada 100%
TPST Soil Recyclers of Maryland Inc. Maryland 100%
Todds Lane Limited Partnership Maryland 100%*
PAGE
EXHIBIT 21
THERMO TERRATECH INC.
SUBSIDIARIES OF THE REGISTRANT
State or Registrant's
Jurisdiction % of
Name Incorporation Ownership
---------------------------------------------------------------------------
TPST Soil Recyclers of New York Inc. New York 100%
TPST Soil Recyclers of Oregon Inc. Oregon 100%
TPST Soil Recyclers of South
Carolina Inc. Delaware 100%
TPST Soil Recyclers of Virginia Inc. Delaware 100%
TPST Soil Recyclers of Washington Inc. Washington 100%
TMA/Hanford, Inc. Washington 100%
* Joint Venture/Partnership