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I <br /> Y %j KLEINFELDER <br /> standard for relative comparison of the held readings. The PID provides a qualitative <br /> indication of contamination. If high PID readings were encountered, aeration was <br /> continued and the soil resurveyed after additional aeration. <br /> ' Once low or no ionizable compounds were recorded from the soil, a confirmation soil <br /> sample was collected from the location with the highest P,D reading. If no PID readings <br /> -1were recorded, a random confirmation soil sample was collected. Three additional <br /> confirmation samples were collected and analyzed from the onsite aerated soil (Table 1) <br /> after its removal from the site,but prior to disposal in the landfill. <br /> V� <br /> Each confirmation soil sample was submitted under chain-of-custody to Chemwest <br /> and analyzed for total petroleum hydrocarbons <br /> Analytical Laboratories, in Sacramento <br /> +. <br /> extractable by GC-FID. Two confirmation samples from the 50 cubic yards of <br /> contaminated soil removed from the original tank excavation were additicnalIy analyzed i <br /> for benzene,toluene,ethyl benzene, and xylene by EPA Method 8020. <br /> Table 1 presents the field and analytical results of the soil aeration. <br /> j 3.3 SOIL DISPOSAL <br /> Samples 'analyzed from each aeration section of soil confirmed that. the TPH <br /> concentrations remaining in the soil were at or below the acceptable limit of 100 mg/kg. <br /> a <br /> This material was disposed of at Forward Landfill in Stockton,California and used as daily <br /> or intermediate cover as specified by the Regional Water Quality Control Board. <br /> , e <br /> 64 <br /> i <br /> - -. .. _ - <br /> - 122-88-1163 4 <br /> J . <br /> fel <br />