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_ µ1 RECMV;4 (IJ/0 SECOR www.secor.com INTERNATIONAL 3017 Kilgore Road,Suite 100 C O R INCORPORATED Rancho Cordova,CA 95670 916-861-0400 reg APR 2 6 2006 916-861-0430 FAx ENVIRONMENT HEALTK April 25, 2006 PERMIT,iSERVICES LD REC'E Mr. Michael J. Infurna Jr., P.G., SREHS V ED San Joaquin County Environmental Health Department APR 2 Site Mitigation Unit 6 2006 304 E. Weber Avenue, 3rd Floor E VIRO�M'EIV Stockton, California 95202-2708 RMITjSERVT yE HEA TH RE: Work Plan for Second Limited Phase II Investigation PG&E - French Camp - General Construction Yard 401 French Camp Road French Camp, California, 95231 SECOR Project No.: 770T.43801.00.0001 Dear Mr. Infurna: On behalf of Pacific Gas and Electric Company (PG&E), SECOR International Incorporated (SECOR) is pleased to submit to San Joaquin County Environmental Health Department (SJCEHD) this work plan to perform a second limited Phase II Investigation of the above- referenced location (Site) (Figure 1). Included are a completed Well Permit Application form and a check for $89.00 in boring permit fees. Prior to the first Phase II investigation, PG&E submitted the required Master File Record Information form and the $279.00 Site Mitigation Fee. Per our E-mail communications, you indicated the Site Mitigation Fee did not need to be paid again. Also included is a site-specific Health and Safety Plan. BACKGROUND In June 2005, SECOR performed a Phase I Investigation of the above-referenced Site and submitted to PG&E on September 12, 2005 a report entitled Phase I Environmental Site Assessment Report, Pacific Gas and Electric Company, 401 French Camp Road, French Camp, California. The Site has been used by PG&E (lessee) as a general construction yard for pipeline crews in the area since the late 1950s and was purchased by PG&E in 1991. The Phase I revealed that in 1995, PG&E removed one concrete aboveground storage tank (AST) (con-vault) with a diesel and a gasoline side from the location shown in Figure 2. The con-vault reportedly replaced steel diesel and gasoline ASTs in the same location. On December 20, 2005 SECOR conducted an investigation to evaluate soil conditions at the con-vault location in accordance with the December 9, 2005 Work Plan for Limited Phase 11 Investigation, PG&E - French Camp - General Construction Yard, 401 French Camp Road, French Camp, California. The investigation was summarized in the February 14, 2006 document entitled Results of Limited Phase 11 Investigation, PG&E - French Camp - General Construction Yard, 401 French Camp Road, French Camp, California. During the investigation, additional information suggested that the former steel ASTs (replaced by the con-vault) may actually have been located elsewhere onsite at the location of the current heavy equipment storage shed. The purpose of this investigation is to evaluate soil conditions for potential petroleum hydrocarbon impacts at the heavy I:\PG&E\PM\work plan 2nd PZ Il.doc I i