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URS <br /> DECODED eA�P-'-'A' s r <br /> S"'.0" <br /> AUG 0 8 2002 <br /> August 6,2002 <br /> ENVIRONMENT HEALI H <br /> Mr.Harlin Knoll PERMIT/SERVICES O434.01.a4 <br /> San Joaquin County Environmental Health Department 0760.0l.a4 <br /> 304 East Weber Avenue <br /> Stockton,California 95202 <br /> Re: Work Plan for Soil Excavation following UST Removal <br /> ARCO Service Stations 434 and 760 <br /> 501 W.Kettleman Lane and 225 Cherokee Lane <br /> Lodi,California <br /> Dear Mr. Knoll: <br /> URS Corporation Americas (URS), on behalf of Atlantic Richfield Company (ARCO), is pleased to present <br /> this work plan to overexcavate petroleum-impacted soils encountered following the removal of the <br /> underground storage tasks (USTs), should it become necessary, at the above-referenced sites. As part of <br /> divestment activities, ARCO is having the USTs, dispensers, and associated piping removed from the sites. <br /> As part of the removal activities, it may become necessary to excavate soils that have been impacted with <br /> petroleum hydrocarbons. <br /> Overexcavation of Petroleum-Impacted Soils <br /> Following the removal of the USTs, dispensers, and associated piping, the subsurface soils will be screened <br /> for the presence of petroleum hydrocarbons using a photoionization detector(PID) and visual observations. <br /> Petroleum-impacted soils will be excavated and stockpiled on plastic sheeting. Overexcavation will be <br /> performed using a backhoe or excavator. The soil stockpile will be covered with plastic following <br /> overexcavation activities. <br /> Confirmation Sampling <br /> At the completion of the overexcavation activities, confirmation soil samples will be collected to assess the <br /> concentrations of petroleum hydrocarbons that remain in the soils. Samples will be collected from the <br /> excavation sidewalls and from the base of the excavation, as necessary, to assess the results of the <br /> overexcavation activities. Sample locations will be selected in the field by URS. <br /> Waste Characterization and Disposal <br /> Following the completion of overexcavation activities, the petroleum-impacted soil stockpiles will be <br /> characterized and transported off site for disposal. The soil stockpiles will be characterized by collecting one <br /> sample for every 50 cubic yards of soil.Following the receipt of the analytical results,the soil stockpiles will <br /> be transported by Dillard Trucking to either Forward Landfill in Manteca or Altamont Landfill in Livermore. <br /> The appropriate landfill will be selected based on disposal costs, which will be calculated and assessed <br /> following the receipt of the stockpile analytical results. <br /> URS Corporation <br /> Crown Corporate Center <br /> 2870 Gateway Oaks Drive,Suite 300 <br /> Sacramento,CA 95833 <br /> Tel:916.679.2000 <br /> Fax:916.679.2900 KAJ5 BP ARCO\00434\UST Removal\WorkPlan.doc <br />