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A <br /> T <br /> R h'CAI_TH <br /> Wo <br /> :3 OCT 2? PM 2: 06 <br /> Chevron U.S.A.Products Company <br /> 2410 Camino Ramon <br /> San Ramon, <br /> October 17, 1993 PO.Box 5004 A 94583 <br /> San Ramon,CA 94583-0804 <br /> Marketing Department <br /> Ms. Mary Meays Phone 510 842 9500 <br /> San Joaquin County Environmental Health <br /> P.O. Box 2009 <br /> Stockton, CA 95201 <br /> Re: Chevron Station#9-6171, 6633 Pacific Avenue, Stockton, CA <br /> Attached quarterly groundwater monitoring report(Sierra,8/2/93) <br /> Attached monitoring well installation report(Sierra,9/15/93) <br /> Dear Ms. Meays: <br /> Please find attached a report dated August 2, 1993, which was prepared by Chevron's consultant, <br /> Sierra Environmental Services (Sierra), to describe groundwater monitoring performed on June <br /> 28, 1993, at the site captioned above. <br /> The measured direction of groundwater flow during June was toward the southeast. The detected <br /> concentrations of dissolved hydrocarbons were consistent with those measured during previous <br /> groundwater monitoring events. <br /> Also attached, is a Sierra report dated September 15, 1993 which describes the installation of <br /> monitoring well MW-7. Soil analytical results included in this report indicate that TPHGas and <br /> BTEX constituents were not present at this location between the depths of 21.0 and 65.0 feet <br /> below grade. Sierra developed well MW-7 on August 27, 1993. Groundwater samples were <br /> collected from MW-7 on September 15, 1993. The measured depth to groundwater and sample <br /> analytical results from well MW-7 will be reported in Sierra's third quarter site monitoring report. <br /> If you have any questions or comments, I can be reached at(510) 842-8695. <br /> Sincerely, <br /> Brett L. Hunter <br /> Environmental Engineer <br /> Site Assessment and Remediation <br />