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The sampling locations are depicted on Figures 3 and 4. <br /> ECC Initial Sampling ECC Final Sampling DLA Sampling <br /> March 1997 August 1997 June 1998 <br /> (prior to cleanup application) <br /> Sample# TPH Leachate TPH TPH Leachate TPH <br /> Hydraulic oil Hydraulic oil Hydraulic oil Diesel Hydraulic oil Hydraulic oil <br /> (mg/kg) (mg/1) (mg/kg) (mg/kg) (mg/1) (mg/kg) <br /> 2 feet bgs 4 feet bgs <br /> 1 29.3 NA NS NS NS NS NS <br /> 2 34.5 NA NS NS NS NS NS <br /> 3 25.6 NA NS NS NS NS NS <br /> 4 46.2 NA 1080 265 1.6 227 <50 <br /> 5 139 1.01 65.8 <10 <1.2 NS NS <br /> 6 16.1 NA NS NS NS NS NS <br /> 7 <10 NA NS NS NS NS NS <br /> 8 871 6.3 333 104 2.3 192 <50 <br /> 9 274 0.77 32.5 11.2 <1.2 NS NS <br /> 10 10.2 NA NS NS NS NS NS <br /> 11 NS NA 15.2 <10 3.4 NS NS <br /> 12 NS NA 11.9 <10 <1.2 NS NS <br /> 13 NS NS NS NS NS <50 * <50 <br /> 14 NS NS NS NS NS 387 <50 <br /> 15 NS NS NS NS NS 221 NS <br /> 16 NS NS NS NS NS <50 * NS <br /> Reporting <br /> limit 10 0.6 10 10 1.2 50 50 <br /> NS=Not Sampled <br /> NA=Not Analyzed <br /> * Sample taken at 1.5 feet bgs <br /> Rough&Ready Island 9 Tetra Tech,Inc. <br /> Revised Draft Work Plan November 18, 1998 <br />