Attached files

file filename
10-K - FORM 10-K - TETRA TECH INCa2195448z10-k.htm
EX-21 - EXHIBIT 21 - TETRA TECH INCa2195448zex-21.htm
EX-32.1 - EXHIBIT 32.1 - TETRA TECH INCa2195448zex-32_1.htm
EX-31.2 - EXHIBIT 31.2 - TETRA TECH INCa2195448zex-31_2.htm
EX-32.2 - EXHIBIT 32.2 - TETRA TECH INCa2195448zex-32_2.htm
EX-31.1 - EXHIBIT 31.1. - TETRA TECH INCa2195448zex-31_1.htm
EX-10.18 - EXHIBIT 10.18 - TETRA TECH INCa2195448zex-10_18.htm

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EXHIBIT 23

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

        We hereby consent to the incorporation by reference in the Registration Statements on Form S-8 (Nos. 333-148712, 033-94706, 333-11757, 333-53036, 333-85558, 333-145201 and 333-145199) of Tetra Tech, Inc. of our report dated November 13, 2009 relating to the financial statements, financial statement schedule and the effectiveness of internal control over financial reporting, which appears in this Form 10-K.

/s/ PRICEWATERHOUSECOOPERS LLP

Los Angeles, California
November 13, 2009




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CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM