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t ENViEiONNVIENTAL h'�`�LTH <br /> PEPH11 ��-]" IC-E <br /> AEGIS ENVIRONMEN9��Jhri P� V+ �C$ . <br /> 1050 Melody Lane, Suite 160,Roseville, CA 95678 ♦ 916.782-21101916.969-2110.1 FAX 916.786-7830 <br /> June 21, 1993 <br /> Ms Gail Clark <br /> Claims Supervisor <br /> Federated Insurance Company <br /> Post Office Box 586 <br /> Citrus Heights, California 95610 <br /> Subject Quarterly Monitoring Findings and Recommendations <br /> Frank's Exxon #4 (Moore Petroleum) <br /> 14800 West Frontage Road, Manteca, California <br /> Federated Claim No 83Z-159 <br /> Dear Ms Clark <br /> Aegis Environmental, Inc (Aegis), is pleased to provide Federated Insurance Company <br /> (Federated) this summary of findings and recommendations following review of the most <br /> recent data collected as a result of quarterly groundwater monitoring conducted on <br /> April 8, 1993, at the subject site The data is summarized in the enclosed "Quarterly <br /> Groundwater Monitoring Report" (OMR), dated May 21, 1993 <br /> SUMMARY <br /> • Groundwater levels have risen in all wells approximately 1 5 feet This was due to <br /> winter rainfall <br /> • The estimated direction of groundwater flow has remained unchanged (to the <br /> southwest) since last quarter <br /> • Laboratory analysis of a water sample collected from domestic well (DW-1) <br /> indicated a petroleum hydrocarbon concentration of 120 parts-per-billion in the <br /> diesel range. However, the laboratory reported the result is due to a hydrocarbon <br /> that does not appear to be diesel <br /> • On May 27, 1993, DW-1 was resampled and analyzed by EPA Method 625 and did <br /> not confirm the diesel anomaly <br /> 90-09700 LTR <br /> GEOLOGISTS • ENGINEERS • GROUNDWATER SCIENTISTS <br />