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`9 <br /> r_: _ t. <br /> d <br /> A Vills.^ <br /> -' iflQffsYY. <br /> September 16, 1991 <br /> ARCO Service Station No, 2076. Lodi, California <br /> Soil Sampling <br /> laced around <br /> le <br /> The sand or gravel backfill materthe tank caviial that was ty ginally stockpiled t <br /> he tanks to rill kpiled onsite. After the tanks are <br /> tank cavity will be removed from <br /> removed, additional materialT�llo native soil samples will beve �ollected within 2tf feet oftti e <br /> and sides of the tank cavity.(approximately 12 feet below grade) for laboratory analyses to <br /> bottom of each former tank (app into <br /> evaluate whether cont?nrs of the itanks alls of theexcavationvat onlwill beocollected native so ed <br /> Additional soil samples from the s <br /> discoloration or odor are d the ted mer productff glinesgatt20 foot inte. Soil lrvals, Soil ampl s will <br /> within 2 feet of bottom of <br /> be submitted to a State licensed laboratory and analyzed for appropriate compounds <br /> according to the SJCPHS GHD guidelines. <br /> theast of <br /> ARCO plans to install the new tanks inz sTtieanew tank te tank cavitytv cavill tserexca aeatlto <br /> station building. as depicted on Plate <br /> `' approximately 12 feet below gra Appropriate sail samples will Ue collected according to <br /> of the cavity to evaluate if hydrocarbons are <br /> the SJCPHS-EHD guidelines from the bottom <br /> present in the soil. <br /> Tank and Product-Line ':tstailation <br /> 0111 <br /> be <br /> Before the new tanks are installed. two Vertical 12-inch-diameter peet into the native lso 1 <br /> installed between each new tank extending from approximately <br /> to the ground surface. The casing will allow soil borings to be drilled between the new <br /> tanks to continue further investigation of soil conditions beneath the new tanks.if warranted. <br /> Results of laboratory <br /> analyses of soil samples collected from the former tank cavity. <br /> proposed tank cavity, and product-line trenches will be forwarded to the SICPHS-EIID. ng <br /> if <br /> laboratory' analyses indicate hydrocarbons ommendi'remedtile ial alternatives.il, at Atwarrantitl is time <br /> remediation, we will evaluate ears feasible <br /> 0 remediation by soil vapor extraction app <br /> New tanks and product lines will not be installed until authorization is mpoobtanentsed f that the <br /> will <br /> SJCPHS-EHD. We may also request authorization to install subgrade colines will be mp <br /> surrounded by clean pea <br /> later be used in the VES. h ie new tanks <br /> cted tan product <br /> uction standa ds <br /> gravel backfill which will P <br /> tv <br /> 30o08-3w <br />