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- _�_ o <br /> Mal <br /> Work Plan September S, 1990 <br /> Arco Service Station 2076,Lodi, California AGS 3000g-1W <br /> samples collected at 5-foot intervals produce PID readings of less than 50 ppmv. A boring <br /> will not be drilled on the opposite end from the fill port. <br /> Two additional soil borings will be drilledto approximately 24 feet below grade in the area <br /> where the new tank cavity may be excavated to evaluate the sail for hydrocarbons. The <br /> proposed tank cavity area is shown on Plate P-2. The new tanks will be installed in the <br /> proposed tank cavity with the approval of the SJPHS. If the laboratory analyses of soil <br /> I samples from these two soil borings indicate gasoline hydrocarbon levels above acceptable <br /> levels,conductor casing may be installed from the tank bottom to the surface,between the <br /> ' new underground tanks if warranted. The conductor casing will allow soil borings to be. <br /> �F drilled between the new tanks to continue further investigation of soil conditions beneath`. <br /> ' the tanks: Vapor-recovery wells could be installed in these borings if.remediation of soil <br /> is warranted. <br /> t - <br /> Collecting Soil Sarnales <br /> I k . <br /> IP tf: <br /> During drilling,soil samples will be collected at S-foot or other appropriate intervals using <br /> r <br /> a California-modified,split-spoon sample-equipped with clean brass sleeves. SL nples will <br /> be collected by drilling the boring to a point just above the sampling depth and then driving <br /> the ram ler into the soil through the hollow center of the auger. The sampler will be driven <br /> p - - --- -- -- ---- - - — --- - --- - - - - -- -- - <br /> r:,a — <br /> a s <br /> F� <br /> ARR1/0d 000s/stems <br />