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GSI Field Methods and Procedures <br /> alternately surging the well with a vented surge block, then purging the well with a pump <br /> or bailer to remove accumulated sediments and draw groundwater into the well. <br /> Development continues until the groundwater parameters (temperature, pH, and <br /> conductivity) have stabilized Well development is performed by Gettler-Ryan Inc. of <br /> Dublin, California Wells are monitored and sampled on a quarterly basks by Unocal <br /> Corporation's monitoring and sampling contractor. <br /> Storing and Sampling of Drill Cuttings <br /> Drill cuttings are stockpiled on and covered with plastic sheeting Stockpile samples are <br /> collected and analyzed for disposal classification on the basis of one composite sample per <br /> 100 cubic yards of soil. Stockpile samples are composed of four discrete soil samples, <br /> each collected from an arbitrary location on the stockpile The four discrete samples are <br /> then composited in the Iaboratory prior to analysis <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 <br /> • hand, mallet, or drive sampler The sample tubes are then covered on both ends with <br /> teflon sheeting or aluminum 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 /> A-3 <br />