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All drill cuttings will be contained onsite on plastic sheets during drilling and then covered, until the analytical results are available. The soil piles will be labeled with the borehole number, owner's name, and date. The drill cuttings will be disposed of at proper facilities on the basis of soil sample analysis. Drill cuttings free of contamination will be disposed �. of on the site. 4 . 2 SOIL SAMPLING i.e. Soil samples will be collected at 5-foot intervals, and at any substantial changes of soil type, beginning at 5 feet below the ground surface, with a 2-inch-diameter, 18-inch split-spoon drive sampler. The sampler and its three 6-inch brass tube liners will be steam cleaned before use in each hole and scrubbed in deionized water and trisodium phosphate and rinsed with deionized water after every sample. Soil samples will be collected to the F total depth of the borehole unless heaving sand is encountered. Every attempt will be made to collect a soil sample at the water table (expected at about 45 to 50 feet below ground surface) . <.� The sampler, lined with three clean 2-inch by 6-inch brass tubes, will be driven 18 inches ahead of the drill augers into undis- turbed soil. The lowermost liner will be retrieved, and the ends of the tube covered with aluminum foil and sealed with plastic caps. The soil samples will be labeled with the sample date, depth, sampler anc! borehole number, placed in zip lock bags, and stored in a cooler containing ice. Soil samples will be delivered, under chain of custody, to - laboratory certified by the California Department of Health Services WHS) . The samples will be analyzed for total petroleum hydrocarbons by DHS-modified FPA Method 8015 and for benzene, toluene, xylenes, and ethylbenzene (BTXE) by EPA Method 8020 - w c5t /97780/6-90/tx 7