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C A M B R I A <br /> June 21, 2002 <br /> Harlin Knoll <br /> San Joaquin County Public Health Services <br /> 304 East Weber Avenue,Third Floor <br /> Stockton, California 95202 <br /> RE Second Quarter 2002 Groundwater Monitoring Report <br /> BP Oil Site No 11191 <br /> 1469 East Hammer Lane <br /> Stockton, California <br /> Cambria Project No 852-1709 <br /> Dear Mr Knoll <br /> On behalf of BP Oil Company, Cambria Environmental Technology, Inc has prepared this <br /> Second Quarter 2002 Groundwater Monitoring Report for the above referenced site This report <br /> summarizes chemical data collected since January 2002, including analytical results associated <br /> .� with samples recently collected on April 11, 2002 <br /> Water level and analytical results for this monitoring event are summarized in Figure 1 and on <br /> Table 1 in Appendix A Based on the contoured elevations, water generally flowed toward the <br /> west During this monitoring event, no benzene was reported in the analyzed samples More <br /> than 10,000 micrograms per liter (}tg/L) of methyl tert butyl ether (MTBE) was reported in <br /> wells MW-3 and MW-4, with a maximum concentration of 18,000 µg/L reported in well MW-3 <br /> We appreciate the opportunity to work with you on this project If you have any questions or <br /> comments, please don't hesitate to call me at(510)450-1985 <br /> 1 <br /> Sincerely, '� <br /> Cambria Environmental Technology, Inc. Cts <br /> gQlAMlg. hl <br /> oak land CA I` <br /> CERT <br /> San Ramon CA GIS <br /> Sonoma, CA d3 <br /> Khaled Rahman, R G , C H G <br /> Cambna Associate Geologist <br /> Environmental F <br /> Technology, Inc <br /> 065th Street <br /> Suite B <br /> Oakland CA 94608 <br /> Tel(510)420-0700 <br /> Fax(510)420-9170 <br />