Exhibit 23.3

               CONSENT OF ERNST & YOUNG LLP, INDEPENDENT AUDITORS

We consent to the reference to our firm under the caption "Experts" in Amendment
No. 1 to the Registration Statement (Form S-3 No. 333-74528) and related
Prospectus of TRC Companies, Inc. for the registration of 1,327,975 shares of
its common stock and to the incorporation by reference therein of our report
dated March 9, 2001 (except Note 9, as to which the date is October 15, 2001)
with respect to the combined financial statements of Site-Blauvelt Engineers
Group for the year ended December 31, 2000, included in TRC Companies, Inc.'s
Current Report on Form 8-K/A filed with the Securities and Exchange Commission
on December 26, 2001 and as further amended by Amendment No. 2 to the Form 8-K
filed with the Securities and Exchange Commission on March 15, 2002.

                                                       /s/ Ernst & Young LLP

Philadelphia, PA
April 19, 2002