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`i I <br /> PUBLIC HEALTH SERVICES <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 9520 OR <br /> 209/468-3420 <br /> ILE CO <br /> KAREN PETRYNA <br /> SHELL C/O EQUILON JUL 2 2 1999 <br /> P O BOX 6249 <br /> CARSON CA 90749-6249 <br /> RE: TOKAY SHELL Site Code: 19061 <br /> 420 W KETTLEMAN LANE <br /> LODI CA 95240 <br /> San Joaquin County Public Health Services, Environmental Health Division (PHD/EHD) is the lead <br /> agency providing the oversight of the investigation and cleanup of releases from underground storage <br /> tanks (UST)within San Joaquin County. PHSIEHD has a contract with California State Water <br /> Resources Control Board to conduct an underground storage tank corrective action program. The <br /> above referenced site was placed in the PHSIEHD Local Oversight Program (LOP) in March 1999 due <br /> to an unauthorized release that was discovered during UST and piping removal. <br /> One 10,000-gallon, one 8,000-gallon, and one 5,000-gallon steel gasoline USTs were removed along <br /> with associated piping and dispensers on January 19, 1999- Soil samples were collected and <br /> contamination was documented. The tank area, dispensers, and piping with contamination were <br /> overexcavated and resampled during PHSIEHD inspection. <br /> PHSIEHD has completed review of the"Underground Storage Tank Removal Report' prepared by <br /> Cambria Environmental Technology, Inc. dated June 11, 1999. The report contains analytical results <br /> for soil samples collected at the site. The areas beneath Dispenser 1 and 2 were excavated to the <br /> limits of the backhoe. The soil beneath Dispenser 1 (DS-1) has Benzene and MTBE concentrations of <br /> .00808 ppm and 3.50 ppm respectively. The soil beneath Dispenser 2 (DS-6) contains TPH-gas, <br /> Benzene and MTBE concentrations of 706 ppm, 0.962 ppm, and 60.4 ppm respectively. The soil <br /> beneath Dispenser 3 (DS-5) had concentrations of 1.91 ppm MTBE. Piping sample (PL-9) at 2.5 feet <br /> evidenced contamination and was resampled (PL-10) at 3.5 feet with a residual concentration of 1.95 <br /> ppm MTBE. <br /> Based on the soil analytical results contained in the report, PHSIEHD directs you to further investigate <br /> the areas of Dispenser 1, 2, 3, and the product line near sample PL-9. <br /> Please submit a work plan, a well permit application and an $89 permit fee by September 30, 1999 to <br /> further characterize these areas of concern. <br /> If you have any further question 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�Lagorio, REHS <br /> Site Mitigation Unit Supervisor <br /> cc: RWQCB, Central Valley Region — Mark List tokayshell <br /> Cambria <br /> Division of San Joaquin Couni, ' eaith Care Services <br />