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A-2 <br /> with water following each sample collection. Soil cuttings generated during drilling operations will be <br /> placed on and covered with visquene on site until laboratory results are obtained and proper methods of <br /> disposal have been approved. <br /> 3.0 SOIL SAIVIPLE SCREENII�TG <br /> After the soil samples in plastic bags have warmed to ambient temperature, the organic vapors within the <br /> headspace will be screened with a PID equipped with a 10.2 eV lamp calibrated to hexane. The sample <br /> bag will be opened and the detector probe immediately placed within the headspace of the bag. The <br /> highest observed reading will be recorded. This number provides a relative comparison of the petroleum <br /> hydrocarbon concentration with the soil samples but is not quantitative. The PID readings will be <br /> recorded on the boring logs. <br /> 4.0 WELL INSTALLATION <br /> Well construction details are illustrated in Enclosure B. Flush-threaded Schedule 40 PVC blank casing, <br /> and 0.020-inch slotted casing will be used to construct the wells. Following the placement of the well <br /> casing and screen, a sand filter pack extending from the bottom of the screen to 3 feet above the top of <br /> the screen will be placed in the annular space. A Moot thick bentonite pellet plug will be placed above <br /> the sand filter pack and hydrated. Cement and bentonite slurry will be placed above the bentonite plug <br /> and extend to the ground surface. Each well will be fitted with a waterproof locking cap (with lock) and <br /> covered by a water-tight protective steel well cover. <br /> LRFIMSJS <br />