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Of these wells, only MW4 has ever shown a significant amount of <br /> hydrocarbon contamination. The other wells provide an outer limit <br /> to the hydrocarbon contamination on the site. <br /> A ground water recovery system was placed into operation on May 13 , <br /> 1991. The system was set to pump water from MW4 . <br /> RAH drilled seven soil borings on November 28 , 1994 . Of the soil <br /> samples from the borings, only those from SB1 contained detectable <br /> amounts of hydrocarbons. No soil contamination was detected in <br /> samples analyzed in the installation of the prior soil borings at <br /> this site. The presence of hydrocarbon contamination in the sample <br /> from SBI most probably results from its close proximity to the old <br /> tank pit. Its location next to the fork lift shop precluded <br /> drilling a conformation boring further from the tank pit in that <br /> direction. <br /> Selection of Soil Boring Locations <br /> The three soil borings will be augured inside the forklift shop. <br /> These boring will serve two purposes: they will help determine if <br /> the shop will have to be removed prior to the next phase of <br /> remediation, and to further define the extent of the soil and <br /> ground water contamination. <br /> • Drilling and Soil Sample Collection <br /> The three soil borings will be hand augured using a 4 . 5" augur, <br /> under the supervision of a geologist, working under C-57 license <br /> #513857. The borings will be augured to a depth of 15 feet below <br /> surface or the top of ground water. Representative soil samples <br /> will be collected at five foot intervals, in 2"X6" brass sleeves, <br /> with the aid of a hand driven slide hammer. After ground water has <br /> been reached, the boring will be allowed to equilibrate and a new <br /> disposable bailer will be used to collect a water sample from the <br /> boring. <br /> The augers and the sampling equipment will be washed with a TSP <br /> solution between each sampling interval. <br /> During the operations, the geologist will maintain a log of the <br /> materials encountered. Soil samples will be field screened for the <br /> presence of total volatile organic (TVO) vapors using a handheld <br /> PID equipped with a 10 . 2 EV lamp. <br /> • 2 <br />