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area were RESNA detected pesticides. The drilling, excavation and sampling procedures are <br /> described in the following section. <br /> 3.0 PROCEDURES <br /> 1) Notify San Joaquin EHD at least 48 hours prior to field work. <br /> 2) Drill one boring to an approximate depth of 35 feet below grade using a hollow-stern auger <br /> drilling ri or until <br /> _ 8 g, groundwater is encountered, 't <br /> 3) Collect discrete soil samples at 5-foot intervals, using a California modified split-spoon sampler <br /> loaded with three 6" brass sample sleeves. Obtain grab sample:of water using a disposable bailer. <br /> 4) Preserve the bottom sleeve by covering the ends with aluminum foil or teflon sheets, capping, <br /> and sealing with duct tape. Water sample will be placed in sterilized sealed bottles. Place samples <br /> in a cooled ice chest. <br /> 5) Extrude the middle and upper sleeves and record the sample Aescriptions on the boring log in <br /> accordance with the Unified Soil Classification System. <br /> 6) Decontaminate the sampling equipment between samples. <br /> 7) Place auger returns on visquine. <br /> 8) Transmit the soil and water samples to Sequoia Analytical and analyze for Organochlorine <br /> pesticides (EPA method 8080). <br /> 9) Backfill borings with a bentonite-cement slurry. <br /> 10) Store decontamination water in 55-gallon DOT drums for later disposal. <br /> 11) Submit a written report describing the investigation and presenting the results to EHD. The <br /> report will be signed by a registered California geologist. <br /> a <br /> i <br /> 1 <br /> i <br />