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k• <br /> During sampling, latex gloves will be worn to prevent cross- <br /> contamination with other samples. The disposable gloves will <br /> ` be discarded after collecting samples from each l8-inch <br /> sample drive. <br /> Soil samples will be collected at five foot intervals, at <br /> changes in lithology and intervals of obvious contamination <br /> in order to develop a complete profile of soil contamination. <br /> The soil samples shall not be composited. Soil borings will <br /> extend through the entire interval of contaminated soil and <br /> will terminate if saturated soil interval is encountered. <br /> VA <br /> i 2. Sample Collection During Tank Removal <br /> Soil samples will be collected as soon as possible after <br /> removal of the tank. Where feasible, all preparations for <br /> soil sampling will be made <br /> oil <br /> samples collected from a backhoe bucket or irectlyor to tank lfromsthe <br /> excavation floor will be collected in a thin-walled stainless <br /> steel or brass cylinder at least three inches long by one <br /> inch in diameter. From 3 to 24 inches of soil will be <br /> removed from the immediate surface area where the sample is <br /> ,. to be taken and the cylinder then pounded into the soil with <br /> a wooden mallet, bulk density driver, or other decontaminated <br /> driving device. No head space will be present in the <br /> cylinder once the sample is collected. Care will be taken to <br /> avoid contamination of both the inside and outside of the <br /> ¢ cylinder as well as its contents. During sampling, latex <br /> gloves will be worn to prevent cross contamination with other <br /> ! , samples. One pair of the disposable gloves will be dedicated <br /> to each sample collected, <br /> g>; Once the sample is collected; each end of the cylinder will <br /> be covered with aluminum foil and then capped with a <br /> polyethylene lid, taped, and labeled. The sample will then <br /> be individually sealed in a ziplock bag and immediately <br /> placed in an ice chest containing dry ice or frozen "blue <br /> ice" for delivery to a state certified laboratory. Sample <br /> identification, storage and transportation will be conducted <br /> ?;r as outlined in the previous section. <br /> 3. Sampling from Soil Piles <br /> Soil samples will be collected and transported from excavated <br /> material in the manner described in the previous section, <br /> F` however, a backhoe will not be utilized. If composite <br /> samples are collected, four brass cylinders will be collected <br /> for every 50 cubic yards of material to be sampled. The <br /> samples will be composited by the state certified analytical <br /> laboratory personnel prior to testing. <br /> i� <br /> �s <br />