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NO Chevron <br /> RECE I E D <br /> FEB ` 9 2001 Chevron Environmental Management <br /> February 7, 2001 Company <br /> 6001 Bollinger Canyon Road <br /> ENVIRt NNIIENT HEALTH P.o.Box 6012 <br /> PERMIT/SERVICES San Ramon,CA 94583-0712 <br /> Ms. Wendy Cohen <br /> Robert D.Mihalovich <br /> California Regional Water Quality Control Board, <br /> Pipeline Program Manager <br /> Central Valley Region Phone:(925)842-1341 <br /> 3443 Routier Road, Suite A Facsimile:(925)842-0213 <br /> Sacramento, California 95827-3003 r <br /> Soil and Groundwater Investigation Reports <br /> Ridgeway (former Burns) Property (APN 232-170-05) <br /> 1881 Rustan Road <br /> Tracy, California <br /> Dear Ms. Cohen: <br /> Chevron Environmental Management Company(Chevron) has performed soil and groundwater <br /> investigation activities and a human health screening evaluation for the subject property. <br /> Enclosed are two documents which summarize these activities for your review. Based on the <br /> results of the investigations, delineation of petroleum-affected soil and groundwater has been <br /> completed and Chevron intends to submit a low risk site closure request to your office for the <br /> subject property. <br /> In its April 27, 2000 letter(enclosed), the Department of Toxic Substance Control concurred <br /> with the human health screening evaluation that the residual levels of petroleum-related <br /> hydrocarbons in the soils at the site are below levels that would constitute an unacceptable risk to <br /> human health and the environment. <br /> In order to facilitate your staff's review of the subject document, Chevron herein approves the <br /> use of the Bruns Property cost recovery account for your staff's review time for this site. <br /> Thank you for your consideration. If you have any questions or require additional information, <br /> please call Penny Fottrell at (925) 842-1343 or me at (925) 842-1341. <br /> Si ere <br /> Robert D. Mihalovich <br /> Pipeline Program Manager <br /> Enclosures January 2000 and December 2000 Geomatrix Consultants reports <br /> April 27, 2000 DTSC letter <br />