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' S E C 0 R • <br /> r, <br /> i <br /> k <br /> i <br /> The wells will be developed after completion The development procedure for each well will consist <br /> of surging the well, then pumping or bailing water from the well until the water is visibly clear, the well <br /> goes dry, or until a maximum of ten casing volumes have been removed , <br /> The newly installed wells will be surveyed by a California State Licensed Surveyor The well casings <br /> will be surveyed to the nearest 0 01 feet in elevation to a known benchmark <br /> . Groundwater Sampling Procedures <br /> Sampling equipment will be thoroughly cleaned prior to each sample The sampling procedure for <br /> each well includes of measuring the water level and checking for the presence of separate-phase <br /> hydrocarbons (SPH), using either an electronic indicator and a clear Teflon® bailer or an oil-water <br /> interface probe The well will then be purged of approximately three casing volumes of water (or to <br /> dryness) using a centrifugal pump, gas displacement pump, or bailer The equipment and purging <br /> method used for the sampling event will be noted on the field data sheets During purging, <br /> temperature, pH, and electrical conductivity will be monitored in order to document that these <br /> parameters are stable prior to collecting samples After purging, water levels will be allowed to <br /> partially recover Groundwater samples will be collected using a Teflon bailer, placed into <br /> appropriate EPA-approved containers, labeled, logged onto chain-of-custody documents, and <br /> transported on ice to a California State-certified laboratory <br /> Laboratory Procedures <br /> Selected soil samples collected will be analyzed for the presence of total petroleum hydrocarbons <br /> . calculated as gasoline, benzene, toluene, ethylbenzene, and xylenes, and fuel oxygenates using <br /> EPA Method 8260 <br /> Soil Cuttings and Rinsate Water <br /> Soil cuttings generated during drilling operations will be temporarily stored onsite in DOT-approved 4� <br /> 55-gallon drums Soil cuttings will be removed by ConocoPhillips disposal contractor to an <br /> appropriate disposal facility Water generated during steam cleaning will be temporarily stored in <br /> DOT-approved 55-gallon drums pending transport by ConocPhillips disposal contractor to an <br /> appropriate disposal or treatment facility <br /> t <br /> a <br /> a <br />