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PUBLIC HEALTH SERVICES <br /> SAN JOAQUIN COUNTY <br /> ENVIRONMENTAL HEALTH DIVISION <br /> Karen Furst, M.D., M.P.H., Health Officer C (D ' <br /> 304 East Weber Avenue, Third Floor - Stockton, CA 95202 <br /> 209/468-3420 AUG 0 5 1998 <br /> TOSCO MARKETING COMPANY BP OIL COMPANY <br /> DAVID J CAMILLE SCOTT T HOOTON <br /> 2000 CROW CANYON PL STE 400 295 SW 41ST SUITE N <br /> SAN RAMON CA 94583 RENTON WA 98005-4931 <br /> RE: TOSCO / BP#11195 SITE CODE: 1554 <br /> 16500 S. Interstate Five <br /> Lathrop, CA., 35330 <br /> San Joaquin County Public Health Services, Environmental Health Division (PHS-EHD) <br /> has reviewed the Alisto Engineering Group's July 23, 1998 "Groundwater Monitoring <br /> and Sampling Report" received on July 31, 1998 and has the following comments. <br /> Groundwater MTBE concentrations in MW-2 have been recorded at 110,000 ug/I for the <br /> sampling event conducted on May 7, 1998. The TPH-G concentration is also the <br /> highest recorded for this monitoring well at 67,000 ug/l. Groundwater from MW-2 <br /> recorded "non-detect" concentrations of MTBE and TPH-G on September 5, 1996. <br /> Since that time the groundwater sample results from this monitoring well has shown <br /> increasing contamination and PHS-EHD considers this to be a new release and has filed <br /> an "Unauthorized Release Report". <br /> You are hereby directed to take immediate steps to investigate, abate, and report <br /> to PHS-EHD the conditions and details of this new release investigation. <br /> Continuing to use (store, pump, fill,) the underground storage tank (UST) system without <br /> identifying, repairing/replacing the leaking parts, and abating the release, may be <br /> considered negligent and in violation of California Health & Safety Code (Chapter 6.7, <br /> Sections 25292.1 and 25295). <br /> Please contact Doug Wilson, Supervising RENS, immediately at (209) 468-3446 to <br /> schedule an inspection of the UST system. <br /> Donna Heran, REHS, Director <br /> Environmental Health Divisio <br /> Michael J. Infuma Jr., Senior REHS Margaret Lagorio, REHS <br /> LOP / Site Mitigation Unit IV Supervisor <br /> MI/ <br /> c: David Irey - San Joaquin County Environmental Prosecutions Unit <br /> C, Mark List - CVRWQCB <br /> Doug Wilson - PHS-EHD, Unit III <br /> A Division of San Joaquin Counry Health Care Services <br />