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Lt O001 SWWJ <br />V <br />washed with an Alconox solution, rinsed with tap water, and rinsed with distilled water prior to <br />each use. An ETIC geologist will supervise drilling and sampling activities. Technical <br />guidance for the program will be provided by a California Professional Geologist. <br />Soil samples will be examined for lithologic identification and visible signs of contamination <br />and the observations will be recorded in the field log. A field meter will be used to monitor for <br />organic vapors. Measurements of headspace vapors from soil samples will be recorded. If any <br />�n , <br />,r unusual stains or odors are evident in the soil, additional samples may be collected for <br />laboratory analysis. 'sCd as <br />Borings H1 through H6 will be drilled to 25 feet bgs. Borings 1­171through H15 will be drilled <br />y r% � <br />to 55 feet bgs. 'Soil samples from borings Hl through H9 and H11 through H13 will be <br />collected at approximate 5 foot intervals starting at 5 feet bgs. Due to the presence of gravel fill <br />`+ in the former 6,000 -gallon gasoline UST excavation area, samples at boring H10 will be <br />jSoil <br />b�m3 <br />collected every 5 feet starting at a depth of 30 feet bgs. samples from boring locations H14=r� <br />c <br />�v <br />and H15 will be collected at 5, 15 and 25 feet bgs only. Soil samples will also be collected at <br />sdi <br />changes in lithology and the soil/groundwater interface. The samples will be collected in clean <br />liners. The liners will be sealed, labeled, stored on ice in a cooler, and transported under chain - <br />of -custody protocol to a state -certified analytical laboratory. <br />The soil samples will be analyzed for TPH-g, BTEX, five fuel oxygenates (DIPE, ETBE, <br />MTBE, TAME, and TBA), and 1,2 -DCA by EPA Method 8260B and TPH-d and TPH-motor <br />oil (TPH-mo) by EPA Method 8015M with a silica gel cleanup. - enud i ref vrl' <br />S. 1; c,s <br />3.2 GROUNDWATER SAMPLING AND LABORATORY ANALYSIS <br />�.. Grab groundwater samples will be collected from the boring drilled beneath the former fuel <br />dispenser island (H7), in the vicinity of the former gasoline USTs (H8 through H12), cross - <br />gradient of the two former 6,000 -gallon gasoline USTs (H13), and downgradient borings H14 <br />and H15. -Samples will be collected using a clean, stainless steel or disposable bailer or <br />peristaltic pump equipped with clean, disposable tubing. The samples will be collected in clean <br />bottles supplied by the analytical laboratory. The sample containers will be sealed, labeled, <br />V <br />stored on ice in a cooler, and transported under chain -of -custody protocol to a state -certified <br />analytical laboratory. The groundwater samples will be analyzed for TPH-g, BTEX, five fuel <br />oxygenates (DIPE, ETBE, MTBE, TAME, and TBA), and 1,2 -DCA by EPA Method 8260B <br />and TPH-d and TPH-mo by EPA Method 8015M with a silica gel cleanup. — f ef , rf tai ; q t d I `�, <br />^,1 ii = l <br />All reusable groundwater sampling equipment will be washed with an Alconox solution, rinsed <br />with tap water, and rinsed with distilled water prior to each use. The completed borings will be <br />filled and sealed with a mixture of grout consisting of neat cement. Each filled boring will be <br />covered with an asphalt patch or concrete to match the surrounding pavement. <br />V <br />10 <br />v <br />