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f � <br /> QUARTERLY SUMMARY REPORT <br /> 2nd QUARTER- 2000 <br /> (Apr. -Jun.) r, <br /> TOSCO 76 BRANDED FACILITY No, 11195 71 <br /> 16500 South Interstate 5 <br /> Lathrop, CA ' <br /> COUNTY: San Joaquin <br /> RWQCB OFFICE: Central Valley Region, Sacramento Office <br /> BACKGROUND: The site contains an operation 76 service station. Five groundwater monitoring wells were installed in <br /> December 1992. Two additional monitoring wells were installed in September 1993. In July 1998,one waste oil underground <br /> storage tank(UST) and the associated remote fill were removed from the site. Approximately 10 cubic yards of soil were <br /> removed from the site and disposed of at an approved landfill. An abandoned domestic well was sampled and properly <br /> destroyed in July 1998. In September 1998,one monitoring well was destroyed and five monitoring wells were installed in <br /> the vicinity of the site. Sensitive receptor and water well surveys have been performed for the site. In December 1998 and <br /> January 1999,three fuel USTs were removed from the site during UST replacement activities. Approximately 1017.96 tons <br /> of soil and backfill materials were removed from the site and disposed of in an approved landfill. A slotted temporary <br /> conductor was installed in the former UST pit to facilitate removal of hydrocarbon-impacted groundwater. In May 1999 <br /> Tosco Marketing Company assumed responsibility for investigative and remedial activities at the site from British Petroleum <br /> (BP). Submitted RemedialAction Plan in July 1999. The eleven monitoring wells are currently sampled on a quarterly basis. <br /> ECENT QUARTER ACTIVITIES: Monitored and sampled the existing wells. Purged 4,000 to 5,000 gallons from the <br /> onductor casing CC-1 and monitoring well MW-5 on 10 events. <br /> NEXT QUARTER ACTIVITIES: Monitor and sample groundwater monitoring wells. Purge 5,000 gallons of groundwater <br /> per week per the Remedial Action Plan. Prepare and submit Remedial Status Report. <br /> CHARACTERIZATIONIREMEDIAL STATUS: <br /> Soil contamination delineated? yes <br /> Dissolved ground water delineated? yes <br /> Free product delineated? none <br /> Amount of gw contaminant recovered this quarter? 49,000 ,(gal) <br /> Amount of gw contaminant recovered historically? 222,760 __(gal) <br /> Soil remediation in progress? no <br /> =?nticipated start? N/A <br /> completion? Janua 1999 <br /> Dissolvee product remediation <br /> in progress? Yes <br /> -anticipated start? February 1999 <br /> -anticipated completion', unknown <br /> CONSULTANT/CONTRACTOR: Gettler-Ryan Inc. <br /> 140193.01 <br /> U 1195gsr.g2 <br />