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PUBLIC Ht ALTH SERVIC*ESU�?loN <br /> SAN JOAQUIN COUNTY <br /> ENVIRONMENTAL HEALTH DIVISION <br /> Karen Furst, M.D., M.P.H., Health Officer <br /> 304 East Weber Avenue, Third Floor • Stockton, CA 95202 <ii=oR <br /> 2091468-3420 <br /> SCOTT HOOTON JUN 18 2001 <br /> MIDWEST ENVIRONMENTAL SERVICES <br /> BP OIL COMPANY <br /> 2.95 SW 41s' STREET <br /> BLDG. 13, SUITE N <br /> RENTON WA 98055 <br /> RE: FORMER BP OIL SITE NO. 11191 SITE CODE: 1126 <br /> 1469 HAMMER LANE <br /> STOCKTON CA <br /> San Joaquin County Public Health Services, Environmental Health Division (PHSIEHD) is the <br /> lead agency providing the oversight of the investigation and cleanup of releases from <br /> underground storage tanks (USTs)within San Joaquin County. PHSIEHD has a contract with the <br /> California State Water Resources Control Board to conduct a UST corrective action program. <br /> The above referenced site was placed in the PHSIEHD Local Oversight Program (LOP) in June <br /> 1993. <br /> In February 1998, four USTs were removed at this site and new USTs were installed. Soil <br /> analytical results for samples collected in the former tank location and the piping trenches <br /> evidenced gasoline, diesel, TBA, and MTBE contamination. Some contaminated soil was <br /> excavated from the UST and piping areas. Soil samples were collected for analyses and <br /> contaminant concentrations remaining in place are as high as the following: TPH-G 1800 ppm, <br /> TPH-D 12 ppm, TBA 12 ppm, xylene 99 ppm, ethylbenzene 10 ppm, and MTBE 4.9 ppm. Due to <br /> the high concentration of residual contamination, additional work will be required at this site. <br /> Please submit a work plan by July 30, 2001, to further investigate soil and groundwater <br /> contamination. Based upon your findings, a feasibility study shall be conducted and remedial <br /> action implemented. <br /> Be advised that the City of Stockton has recently installed a public water well near your site <br /> approximately 2000 feet to the south at 7400 West Lane Frontage. The well is 600 feet in total <br /> depth, has a 24-inch diameter casing, and will most likely be put in use soon. <br /> If you have any further questions regarding this matter, contact Harlin Knoll at(209)468-3442. <br /> Donna Heran, REHS, Director <br /> Environmental Health Division <br /> Harlin Knoll, Senior REHS Margare agorio, REHS <br /> LOP/Site Mitigation Unit IV Supervisor <br /> cc: CVRWQCB—Marty Hartzell <br /> A Division of San Joaquin County Health Care Services <br />