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r <br /> .j <br /> I i <br /> i <br /> SOIL SANPLING PROTOCOL <br /> DRILI. RIG <br /> I I� <br /> .I <br /> 1. The Environmental Health Division of the County Health Department <br /> will be, notified in advance of all activity. <br /> it <br /> 2. A utility clearance will be performed by Underground Services <br /> Alert and McLaren Engineering personnel prior to sampling. All <br /> underground utilities will be clearly marked. <br /> I. <br /> 3. Prior to arriving at the sample site and between samples, all <br /> sampling equipment will be washed in a solution of trisodium <br /> phosphate (TSP), dishwashing soap and water, and rinsed twice with <br /> tap water and once with deionized water. <br /> ij <br /> k 4. Soil samples will be obtained using a California modified split- <br /> spoon sampler containing three 6-inch long, 2 1/2-inch diameter <br /> brass tubes. The sampler is driven 18 inches ahead of the hollow <br /> stem auger with a 140-pound drop hammer. The sampler is then <br /> removedl'from the boring and opened to reveal the brass tubes. The <br /> bottom ;`tube will be capped with aluminum foil and plastic end <br /> caps, labeled and immediately placed into a cooler containing ice <br /> or "blue ice". This tube will be archived. From the middle <br /> sample ,tube three pre-tared 40ml EPA vials containing 10ml of <br /> methanol (methanol vials) will be filled approximately 3/4 full <br /> with soil and sealed with a teflon-lined screw cap. The methanol <br /> vials are then labeled and immediately placed in a cooler. A <br /> stainless steel scoop is used to collect soil from the brass tube <br /> and to 'insert the soil into the methanol vials. Methanol vial <br /> soil samples can be analyzed for total petroleum hydrocarbons <br /> (TPH) and benzene, toluene, and xylene (BTX). All remaining soil <br /> in the Middle brass tube will be extruded into a one gallon sized <br /> plastic (ziplock bag. A head space analysis will be performed with <br /> a photoionization detector (PID) on the soil in the plastic bag. <br /> The PID) may also be used to monitor soil cuttings around auger <br /> flightsduring drilling. Soil in the uppermost brass tube will be <br /> described for texture, color, moisture content and any other <br /> distinguishing characteristics. Soil properties will also be <br /> noted in: the middle brass tube and from the sample shoe which is <br /> located `in front of the lower sample tube. <br /> 5. Soil samples will be collected at five foot intervals, at a <br /> minimum, beginning at f ive feet in depth. The upper f ive feet of <br /> each bor;'ing will be probed with a hand auger, primarily to confirm <br /> the absence of underground utilities. Sampling will continue <br /> until a lj'specified depth is reached. Each boring will be filled <br /> with a mixture of Portland cement and 5 percent Bentonite powder <br /> from total depth to ground surface. The grout will be introduced <br /> through the auger flights to ensure an adequate seal. All auger ! <br /> r <br /> 6 7 <br />