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During the drilling of soil boring MW-16, undisturbed soil samples were <br /> collected continuously as drilling progressed for llthologic and <br /> hydrogeologxc description The samples were collected by driving a split- <br /> barrel drive sampler lined with 2-inch diameter brass tubes ahead of the <br /> auger tip with successive blows from a 140-1b hammer dropped 30- <br /> inches The soil was described by the site geologist using the Unified Soil <br /> Classification System No soil samples were analyzed from this boring <br /> since it was drilled near boring MW-13, where soil samples were <br /> previously collected and analyzed <br /> Undisturbed soil samples were also collected continuously during the <br /> drilling of soil borings MW-19, MW-20, RW-1 and RW-3 These samples <br /> were collected by driving a Macrocore sampler ahead of the auger tip <br /> using direct push methods One tube from each sampling interval was <br /> immediately trimmed, sealed with Teflon tape, plastic end caps and duct <br /> tape, labeled, sealed in a plastic bag and stored on ice for transport to Kiff <br /> Analytical of Davis, California (FLAP 2236) under chain of custody Soil <br /> from the remaining tubes was described by the site geologist using the <br /> Unified Soil Classification System <br /> Since borings MW-17 and MW-1$ were drilled near boring CPT-16 for the <br /> installation of groundwater monitoring wells, and since the sandy <br /> sediments present beneath the site presented the possibility of heaving <br /> (flowing) sands during drilling, the bottom auger was plugged with a <br /> wooden block and no soil sampling was conducted in these borings In <br /> these borings, the drilling was halted at the total depth of the well to be <br /> constructed, and the wooden plug at the bottom of the augers was <br /> knocked out with a 140-1b hammer dropped through the augers prior to <br /> the construction of the monitoring wells <br /> 4.4, Decontamination and 1Disposal of Seam-C`1eaning_insate and Drill <br /> ung <br /> Drilling equipment was steam-cleaned prior to use, and sampling <br /> equipment was washed with a TSP solution between sampling intervals to <br /> prevent cross-contamination Rinsate was contained on-site in sealed a n d <br /> labeled 55-gallon steel drums Drill cuttings were contained in steel bins <br /> and were transported to Forward Landfill for disposal <br /> Franks One Stop Report — November 2000 <br /> -10- <br />