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Chevron <br /> Chevron <br /> Chevron Pipe Line Company <br /> May 27, 1997 4000 Executive Parkway,Suite 400 <br /> San Ramon,CA 94583 <br /> P.O.Box 6059 <br /> San Raman,CA 94583-0759 <br /> Stephen DiZio, Ph.D <br /> California Environmental Protection Agency <br /> Department of Toxic Substances Control <br /> 301 Capitol Mall,Third Floor <br /> Sacramento, CA 95812-0806 <br /> Supplemental Risk Evaluation <br /> Alden Park Area,Tracy,California <br /> Dear Dr. DiZio: <br /> Please find enclosed the Supplemental Risk Evaluation, dated May 21, 1997, for your review. <br /> This report was prepared at your request by Geomatrix Consultants, Inc. (Geomatrix) on behalf <br /> of Chevron Pipe Line Company (CPL). As described in the Supplemental Risk Evaluation, <br /> exposure to oily material present at the site should not result in excess health risks greater than <br /> those generally considered acceptable. However,CPL will continue to remove any oil that seeps <br /> to the surface to minimize exposure to the oily material. <br /> Please contact Elizabeth Lu (510/842-6855),Mr. Greg Brorby of Geomatrix (415/434-9400), or <br /> me (510/842-6877)if you have any questions or require additional information. <br /> Sincerely, <br /> 'Kai" k 1A 1 c� <br /> K.L. Hower <br /> Project Manager <br /> California Site Remediation <br /> TETL0347.DOC <br /> cc: Michael Inftuna- San Joaquin County Public Health Services <br /> Joel Weiss- Regional Water Quality Control Board- Central Valley Region <br /> Susan Thorpe- City of Tracy <br />