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{ <br /> i <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 /> r 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 prior to tank removal. Soil, <br /> samples collected from a backhoe bucket or directly from the <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 /> j 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 disposable gloves will be dedicated <br /> to each sample collected. <br /> Once the sample is collected, each and of the cylinder will <br /> be covered with aluminum foil or teflon tape and then capped <br /> with a polyethylene lid, taped, and labeled. The sample will <br /> E then be individually sealed in a ziplock bag and immediately <br /> j 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 /> as outlined in the previous section. <br /> 3. Sampling from Soil Piles or Shallow Soil. Pits <br /> Soil samples will be collected and transported from excav-ted <br /> material in the manner described in the previous section, <br /> 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 unless <br /> otherwise specified by the lead regulatory agency. The <br /> I; samples will be composited by the state certified analytical <br /> laboratory personnel prior to testing. <br /> i <br />