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*1100 California *ional Water Quality Cont Board <br /> Central Valley Region <br /> Karl E.Longley,ScD,PE,Chair 0 <br /> Linda S.Adams Fresno Branch Office Arnold <br /> Secretary for 1685 E Street,Fresno,California 93706 Schwarzenegger <br /> Environmental Governor <br /> Prosection (559)445-5116 •Fax(559)445-5910 <br /> httpalwwty.waterboards,ca.gov/centralvalley <br /> 14 March 2007 MED <br /> M. Scott Mansholt L11 D <br /> Chevron Environmental Management Company Mti 1 187 <br /> 6001 Ballinger Canyon Road, Room K2066 ENVfRCNj,,,f. <br /> !San Ramon, CA 94583-2324 HEALiH <br /> REQUEST FOR EXTENSION TO SUBMIT ADDITIONAL CHARACTERIZATION REPORT, <br /> MOUNTAIN HOUSE SITE #3 PROPERTY, TRACY, SAN JOAQUIN COUNTY <br /> Regional Water Board staff has reviewed the referenced document for the Mountain House <br /> Site #3 property, on West Byron Road, dated 12 March 2007 for the Chevron Old Valley <br /> Pipeline (OVP) project, northwest of Tracy, CA. The request letter was prepared on behalf of <br /> Chevron by Science Applications International Corporation (SAIC). <br /> Previously, in a 23 October 2006 request letter to Chevron, Regional Water Board directed the <br /> company to complete an investigation to address additional soil and groundwater delineation <br /> needs at the site. According to the document, the work was to be completed and the <br /> summary report submitted by 30 March 2007. <br /> Currently, the site is primarily undeveloped agricultural land and gaining access to multiple <br /> properties has been time consuming. Thus, until complete access can be obtained, Chevron <br /> has asked for an extension to submit the summary report of findings for the additional <br /> characterization work. <br /> Regional Water Board staff concurs that the additional time is necessary to complete the <br /> characterization and investigation. <br /> By 15 October 2047 provide a report containing the results of the additional characterization. <br /> Please notify Regional Water Board staff at least 48 hours prior to commencement of field <br /> activities. <br /> If you have any questions or comments, please contact Dean Hubbard at (559) 445-5179. <br /> /) <br /> - , , 4'Djc') <br /> SHELTON R. GRAY ,u <br /> '�R' C. DEAN HUBBARD <br /> Senior Engineering Geologist Engineering Geologist <br /> P.G. No. 6357 <br /> cc: Mike Infurna, San Joaquin County EHD, Stockton <br /> Mike Jenkins, SAIC, Sacramento <br /> Caryl Weekley, SAIC, San Ramon <br /> California Environmental Protection Agency <br /> QiRecycled Paper <br />