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PUBL C HEALTH SERVICES oP4u� .�o <br /> SAN JOAQUIN COUNTY <br /> JOGI KHANNA M.D.,M.P.H. <br /> Health Officer Pt P.O. Box 2009 0 (1601 East Hazelton Avenue) • 5tockton, CaliFomia 95201FO <br /> (209)468-3400 <br /> APR 2 3 1991 <br /> D � <br /> S J ROLLER <br /> SHELL OIL COMPANY <br /> P O BOX 4023 <br /> CONCORD CA 94524 <br /> RE Pershing Shell IN REPLY REFER TO SITE CODE: 1785 <br /> 4445 N. Pershing Ave. <br /> Stockton, CA <br /> Public Health Services, Environmental Health Division (PHS/EHD) has reviewed the "Monitoring Well <br /> Installation Results Report" and the first"Quarterly Monitoring Report" dated March 5, 1991, and has the <br /> following comments: <br /> ]. The work outlined in the monitoring well installation results report had been performed <br /> eight months prior to its receipt by PHS/EHD. Future submittals will need to be done more <br /> timely. <br /> 2. Based on the first quarterly monitoring report, determination of groundwater gradient <br /> indicates that the only downgradient well is in the sidewalk and is sampled and maintained <br /> by Exxon U.S.A. PHS/EHD recommends that Shell install a well downgradient from and <br /> closer to the old underground tank basin. i. <br /> I <br /> 3. Total coliform testing of MW#2 is not necessary,PHS/EHD only needs fecal coliform. All <br /> wells should be analyzed for total lead rather than organic lead, TPHg, and BTEX- <br /> if you have any questions contact Steven Schneider, REHS, of my staff at (209)468-3441. <br /> Jogi Khanna, M.D., M.P.H. <br /> Health Offic r i <br /> urie A. Cotulla, S, Program Manager <br /> Environmental Health Division <br /> LAC/SS:nr <br /> c: CVRWQCB <br /> c: Aegis Environmental, Inc. - Jacqueline Doub <br /> 801 Riverside Avenue, Ste. C, Riverside, CA 94578 <br /> A Division of San Joaquin County Health Care Services <br /> a <br />