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• <br /> ATTACHMENT B <br /> FIELD AND LABORATORY PROCEDURES <br /> Depth-discrete soil samples were not submitted for laboratory analysis during this investigation <br /> Soil Sampling of Stockpiled Soil <br /> Soil samples were collected by filling four 2-inch diameter brass sample liners with a composite of soil from <br /> each of the 55-gallon drums One composite sample was collected per approximately 100 cubic yards of soil <br /> Soil samples were then labeled, and capped with Teflon sheets and plastic end caps The samples were then <br /> sealed in zip-lock bags, placed on ice, and transported to the laboratory accompanied by the appropriate <br /> chain-of-custody documentation <br /> Laboratory Analysis for Soil Stockpile Sample <br /> Analyses for TPHg and volatile organic compounds including benzene, toluene, ethylbenzene, xylenes <br /> (BTEX compounds) and fuel oxygenates were analyzed by EPA Method 8260B Analysis for lead was <br /> performed by EPA Method 6010 <br /> Groundwater Sampling Procedures <br /> The sampling procedure for each well consisted of first of measuring the water level and then checking for the <br /> presence of separate-phase hydrocarbons (SPH), using either an electronic indicator and a clear TeflonO <br /> bailer or an oil-water interface probe Wells not containing SPH that did not have submerged screens were <br /> then sampled without purging Wells were purged of approximately three casing volumes of water (or to <br /> dryness) using a centrifugal pump, gas displacement pump, or bailer Equipment and purging methods used <br /> for the current sampling event is noted on the attached field data sheets During purging, temperature, pH, <br /> and electrical conductivity were monitored in order to document that these parameters were stable prior to <br /> collecting samples After purging, water levels were allowed to partially recover Groundwater samples <br /> (purged and not purged) were collected using a Teflon bailer, placed into appropriate EPA-approved <br /> containers, labeled, logged onto chain-of-custody documents, and transported on ice to a California State- <br /> certified laboratory Field data sheets are presented as Attachment D <br /> Laboratory Analysis for Groundwater Samples <br /> Analyses for TPHg, BTEX compounds and MtBE were performed by EPA Methods 801513/8021B MtBE <br /> was verified by EPA Method 8260B <br /> Page B - 1 <br />