THERMO TERRATECH INC

Certification of termination of registration of a class of securities (Section 12(b))

General form for quarterly reports under Section 13 or 15(d)

Annual report pursuant to Section 13 or 15(d) (amendment)

Annual report pursuant to Section 13 or 15(d)

2,7

No description available

No description available

2,7

2,7

General form for quarterly reports under Section 13 or 15(d)

2,7

Beneficial ownership report for a passive holder of more than 5% (Schedule 13G) (amendment)

Beneficial ownership report for a holder of more than 5% (Schedule 13D) (amendment)

General form for quarterly reports under Section 13 or 15(d)

5,7

Beneficial ownership report for a holder of more than 5% (Schedule 13D) (amendment)

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Post-effective amendment to a registration statement

General form for quarterly reports under Section 13 or 15(d)

Annual report pursuant to Section 13 or 15(d) (amendment)

5,7

ITEM INFORMATION:

Beneficial ownership report for a holder of more than 5% (Schedule 13D) (amendment)

Beneficial ownership report for a passive holder of more than 5% (Schedule 13G) (amendment)

Beneficial ownership report for a passive holder of more than 5% (Schedule 13G)

General form for quarterly reports under Section 13 or 15(d)

General form for quarterly reports under Section 13 or 15(d)

5

5,7

Beneficial ownership report for a holder of more than 5% (Schedule 13D) (amendment)

General form for quarterly reports under Section 13 or 15(d)

Definitive Proxy Statement

Beneficial ownership report for a holder of more than 5% (Schedule 13D) (amendment)

Annual report pursuant to Section 13 or 15(d)

General form for quarterly reports under Section 13 or 15(d)

General form for quarterly reports under Section 13 or 15(d)

2,7

2,7

Beneficial ownership report for a holder of more than 5% (Schedule 13D) (amendment)

Beneficial ownership report for a holder of more than 5% (Schedule 13D) (amendment)

Definitive Proxy Statement

Beneficial ownership report for a holder of more than 5% (Schedule 13D) (amendment)

General form for quarterly reports under Section 13 or 15(d)

Annual report pursuant to Section 13 or 15(d) (amendment)

Beneficial ownership report for a holder of more than 5% (Schedule 13D) (amendment)

Annual report pursuant to Section 13 or 15(d)

Beneficial ownership report for a holder of more than 5% (Schedule 13D) (amendment)

Beneficial ownership report for a holder of more than 5% (Schedule 13D) (amendment)

General form for quarterly reports under Section 13 or 15(d)

General form for quarterly reports under Section 13 or 15(d)

Annual report pursuant to Section 13 or 15(d) (amendment)

Definitive Proxy Statement

General form for quarterly reports under Section 13 or 15(d)

Preliminary Proxy Statement

Post-effective amendment to a registration statement

Post-effective amendment to a registration statement

Registration statement under Securities Act of 1933

Current report pursuant to Section 13 or 15(d)

Withdrawal of a registration statement

No description available

Current report pursuant to Section 13 or 15(d)

No description available

Registration statement under Securities Act of 1933

No description available

Beneficial ownership report for a holder of more than 5% (Schedule 13D) (amendment)

2,7

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

5,7

2,7

2,7

Definitive Proxy Statement

No description available

Current report pursuant to Section 13 or 15(d) (amendment)

Current report pursuant to Section 13 or 15(d) (amendment)

Current report pursuant to Section 13 or 15(d)

Beneficial ownership report for a passive holder of more than 5% (Schedule 13G) (amendment)