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i <br /> l I <br /> Appendix A <br /> Drilling and Sampling Procedures <br /> r The procedures that will be used for drilling the borings, collecting soil samples, and collecting <br /> L groundwater grab samples are presented below. <br /> • An encroachment permit for the field investigation will be obtained from the California <br /> Department of Transportation prior to the fieldwork. <br /> • A drilling permit will be obtained from the San Joaquin County Environmental Management <br /> Department. <br /> Drilling and Soil Sample Collection <br /> • One soil boring will be advanced to depths of up to app9roximately 30.0 meters (100 feet) <br /> below the ground surface (BGS)using CPT Geoprobe , direct-push, sampling equipment. <br /> • The drilling equipment will be washed prior to drilling. <br /> • Soil samples will be collected using an approximately 2.5-centimeter (1-inch) diameter <br /> sampler lined with a previously unused (new) acetate sample tube. Soil samples-retained for <br /> hazardous materials testing shall be 5 to 8 .inches in length. <br /> • The samplers will be washed between sample intervals using a bristle brush with Alconox <br /> solution followed by two tap water rinses and a deionized water rinse. The samplers will be <br /> dried by air or with paper towels prior to sampling. <br /> r • Following retrieval of the sampler, an approximately 0.15-meter (0.5-foot) section of the <br /> t� sample tube from the desired depth will be retained, the ends covered with Teflon film, and <br /> capped with polyvinyl chloride (PVC) end caps. Each sample will be labeled with the <br /> sample number, date, project number, and sampler's initials. <br /> • Samples retained for laboratory analysis will be placed in ziplock bags and stored on ice in an <br /> insulated chest cooled to a temperature of approximately 4 degrees Celsius. <br /> • Chain of custody procedures, including the use of chain of custody forms, will be used to . <br /> document sample handling and transport from collection to delivery to the laboratory for <br /> analysis. <br /> • Soil that is not retained for laboratory analysis will be placed into 208-liter (55-gallon) drums <br /> and stored at the site. <br /> L <br /> SnrDP-N.,\rrsuefplVrnjecrs\8M35278�wY4)ln&hsIAW CPT_wkp.doc <br /> 214102 <br />