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1 <br /> PUBLICHEALTH <br /> SERYICES RgUIN <br /> SAN JOAQUIN COUNTY <br /> ENVIRONMENTAL HEALTH DIVISION. <br /> Ernest M. Fujimoto, M.D., M.P.H., Acting Health:Officer <br /> 445 N. San Joaquin Street • P.O. Box 388 • Stocktoni. CA 95201-0388 �4t1FSR`'`P <br /> (209) 468-3420 <br /> f <br /> I DAN KIRK <br /> SHELL OIL COMPANY <br /> P O BOX 5278 FCB 0 g 19941 <br /> CONCORD CA 94520 <br /> RE: Shellrv' <br /> Se Ice Station SITE CODE: 1906 <br /> 420 W. Kettleman Lane <br /> Lodi CA <br /> San Joaquin County Public Health Services, Environmental Health Division (PHS/EHD) has reviewed <br /> the "Quarterly Groundwater Monitoring Report" dated January 12, 1994 and the January 27, 1994 <br /> letter prepared by Aegis Environmental, Inc. for the above referenced site. <br /> Results of the groundwater samples collected from the three monitoring wells have not evidenced <br /> contamination since October 1992, prior to that low concentrations were evidenced twice in MW1 and <br /> once in MW3. <br /> The groundwater gradient for this site varies from southeast to southwest so both MW1 and MW2 are <br /> upgradient of the underground storage tanks (UST's) and their piping: The location of MW3 is 120 <br /> feet southwest of the UST's. There are no monitoring wells close to and downgradient of the UST's <br /> or boring 8 (drilled in 1989 near the thief port) where soil contamination was evidenced at 10 feet <br /> below grade. <br /> Further investigation to define the extent of the soil/groundwater�contamination is warranted. Annual <br /> sampling and monitoring is acceptable until this further investigation ii conducted. <br /> If you have any questions contact Margaret Lagorio, Senior REHi S, at (209) 468-3449. <br /> Ernest M. Fujimoto, M.D., M.P.H. <br /> Acting Health Off er <br /> W, <br /> Diane M. Hinson, Supervising R.E.H.S. <br /> Environmental Health Division <br /> DMH/ml <br /> c: CVRWQCB - Beth Thayer <br /> c: Aegis <br /> A Division of San Joaquin County Health Care Services <br />