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GR Field Methods and Procedures <br /> Storing and Sampling of Drill Cuttings <br /> Drill cuttings are stockpiled on plastic sheeting or stored in drums depending on site conditions and <br /> regulatory requirements. Stockpile samples are collected and analyzed on the basis of one <br /> composite sample per SD cubic yards of soil. Stockpile samples are composed of four discrete soil <br /> samples, each collected from an arbitrary location on the stockpile. The four discrete samples are <br /> then composited in the laboratory prior to analysis. <br /> Each discrete stockpile sample is collected by removing the upper 3 to 6 inches of soil, and then <br /> driving the stainless or brass sample tube into the stockpiled material with a hand, mallet, or drive <br /> sampler. The sample tubes are then covered on both ends with Teflon sheeting, capped, labeled, <br /> and placed in a cooler with blue ice for preservation. A chain-of-custody form is initiated in the <br /> field and accompanies the selected soil samples to the analytical laboratory. Stockpiled soils are <br /> covered with plastic sheeting after completion of sampling. <br /> Wellhead Survey <br /> The top of the newly-installed well casing is surveyed by a California-licensed Land Surveyor to <br /> mean sea level (MSL). <br /> Well Develo ment <br /> The purpose of well development is to improve hydraulic communication between the well and <br /> surrounding aquifer. Prior to development, each well is monitored for the presence of separate- <br /> phase hydrocarbons and the depth-to-water is recorded. Wells are then developed by alternately <br /> surging the well with the bailer, then purging the well with a pump to remove accumulated <br /> sediments and draw groundwater into the well. Development continues until the groundwater <br /> parameters (temperature,pH, and conductivity)have stabilized. <br /> Groundwater Monitoring and Sampling <br /> Decontamination Procedures <br /> All physical parameter measuring and sampling equipment are decontaminated prior to sample <br /> collection using Alconox or equivalent detergent followed by steam cleaning with deionized water. <br /> During field sampling, equipment placed in a well are decontaminated before purging or sampling <br /> the next well by cleaning with Alconox or equivalent detergent followed by steam cleaning with <br /> deionized water. <br /> A-3 <br />