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Quality Assurance/Quality Control Plan Page 10 <br />Soil samples will be collected at five foot intervals, at significant changes in lithology and <br />intervals of obvious contamination in order to develop a complete profile of soil contamination. <br />11.2 SAMPLE COLLECTION DURING TANK REMOVAL <br />Soil samples will be collected as soon as possible after removal of the tank. Where feasible, all <br />preparations for soil sampling will be made prior to tank removal. Soil samples collected from <br />a backhoe bucket or directly from the excavation floor will be collected in a thin-walled stainless <br />steel or brass cylinder at least three inches long by one inch in diameter. From 3 to 24 inches <br />of soil will be removed from the immediate surface area where the sample is to be taken and the <br />cylinder then pounded into the soil with a wooden mallet, bulk density driver, or other <br />decontaminated driving device. No head space will be present in the cylinder once the sample <br />is collected. Care will be taken to avoid contamination of both the inside and outside of the <br />cylinder as well as its contents. During sampling, latex gloves will be worn to prevent cross <br />contamination with other samples. One pair of disposable gloves will be dedicated to each <br />sample collected. <br />One the sample is collected, each end of the cylinder will be sealed with aluminum foil or teflon <br />tape and then capped with a polyethylene lid, taped, and labeled. The sample will then be <br />individually sealed in a ziplock bag and immediately placed in an ice chest containing dry ice <br />or frozen chemical ice for delivery to a state certified laboratory. Sample identification, storage <br />and transportation will be conducted as outlined in the previous section. <br />11.3 SAMPLING FROM SOIL PILES OR SHALLOW SOIL PITS <br />Soil samples will be collected and transported from excavated material in the manner described <br />in the previous section, however, a backhoe will not be utilized. If composite samples are <br />collected, four brass cylinders will be collected for every 50 cubic yards of material to be <br />sampled unless otherwise specified by the lead regulatory agency. The samples will be <br />composited by the state certified analytical laboratory personnel prior to testing. <br />