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L SOP 1 - DRILLING AND SOIL SAMPLING <br /> Prior to drilling, drilling and well construction permits will be obtained from the SJLHD. An <br /> L. engineer or geologist (under the supervision of a California-Licensed Engineer or Geologist) <br /> will be present during drilling and/or sampling to collect, or assist in the collection of <br /> relatively undisturbed samples of the subsurface materials, maintain logs of borings, and make <br /> observations of the site conditions. Drilling will be performed by a truck-mounted drill rig, a <br /> limited access drill rig utilizing a hollow-stem auger method, or with hand-auger equipment, <br /> as appropriate. Prior to drilling each boring, augers and sampling equipment will be <br /> decontaminated. Procedures for decontamination are presented in Equipment <br /> Decontamination. At the conclusion of drilling, borings will be backfilled with a neat-cement <br /> grout. Grout will be placed using a tremie. <br /> w <br /> Sample Locations and Depths <br /> Soil sampling will be attempted in the borings at five-foot intervals, commencing at an <br /> approximate depth of five feet below the existing grade. Soil samples will be subjectively <br /> evaluated for the presence of petroleum hydrocarbons. Subjective analyses will include <br /> observation of color changes, odor and field screening using a Photo-ionization Detector. <br /> Soil Sampling Apparatus and Sample Shipment <br /> Soil samples will be collected with a California split-barrel sampler, lined with brass or <br /> stainless steel tubes. The sampler will be driven or pushed below the open bottom of the <br /> hollow-stem auger. Relatively undisturbed samples will be retained for chemical analysis. <br /> Sample tubes collected in the split-barrel sampler will be retained (assuming 100% recovery), <br /> logged and/or chemically analyzed. If utilizing hand-auger equipment, brass or stainless steel <br /> tubes will be contained in a drive-sampler, and driven with a slide hammer. Subsequent to <br /> collection, the ends of the sample tubes will be covered with Teflon film or aluminum foil <br /> and sealed with a plastic cap. <br /> Soil samples will be stored on-site in an ice chest and kept cool with "Blue-ice". The <br /> temperature inside of the cooler will be maintained at 4 degrees Celsius, plus or minus 2 <br /> degrees. Samples will be shipped under appropriate Chain-of-Custody (COC) protocol to the <br /> California Licensed Analytical Laboratory for chemical analyses. Chain-of-Custody protocols <br /> i. are further described in Sample Chain-of-Custody. <br /> Soil Cutting Storage <br /> Auger cuttings will be stored in DOT approved drums at an on-site location specified by the <br /> property owner. Results of chemical analyses will be used to assist the owner in appropriate <br /> +• disposal of the cuttings. <br /> WorW.n Sop,_0740OWS_Revised hue ins SOP 1 -1 <br /> &Associates <br />