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--------------- <br /> Unocal Station No. 5325 <br /> August 29, 1994 <br /> Well Development and Sampling <br /> Each wells is alternately surged with a bailer, then purged to remove accumulated sediments. <br /> Development continues until the water in each well runs clear and well parameters <br /> (temperature, pH, and conductivity) have stabalized. After development the wells are <br /> sampled by Unocal's monitoring and sampling contractor (MPDS Services, Incorporated). <br /> St.orinz and Sampling or Drill Cuttings <br /> Drill cuttings are stockpiled on plastic sheeting. Stockpile samples are collected on the basis <br /> of one composite sample per 50 cubic yards of soil. Each composite stockpile sample is <br /> composed of 4 discrete sample tubes, composited. in the laboratory prior to analysis. <br /> Locations of each discrete stockpile sample are chosen arbitrarily. <br /> Each discrete stockpile sample is collected by removing the upper 3 to 6 inches of soil, and <br /> them driving the stainless steel or brass sample tube into the stockpiled material with a hand, <br /> mallet, or drive sampler. The sample tubes are then covered on both ends with teflon <br /> sheeting or alllminuM foil, capped, labeled, and placed in a cooler with blue ice for <br /> preservation. A chain-of-custody form is initiated in the field and accompanies the selected <br /> soil samples to the analytical laboratory. Stockpiled soils are covered with plastic sheeting <br /> after completion of sampling. <br /> 3 <br /> 48[4702-18 <br /> GeoStrategies Inc. <br />