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15 May 2001 <br /> AGE-NC Project No 97-0333 <br /> ' Page 5 of 7 <br /> ' 3 2 1 Extracted Water Analytical Results <br /> The results of the laboratory analysis detected TPH-g at a concentration of 37,000 micrograms per <br /> ' liter (,ug/1) TPH-d was detected in the water sample at a concentration of 680 ,ug/l, however, the <br /> laboratory reported that the diesel chromatogram contained sigruficant lighter range gasoline <br /> compounds and a non-diesel pattern <br /> BTEX compounds were detected in the grab ground water sample at a concentrations as high as <br /> 3,900,ug/l (toluene),benzene was detected in the sample at a concentration of 1,500,ug/l <br /> MTBE was detected in the grab water sample at a concentration of 56,000µg1l (EPA 8260), TAME <br /> was detected at a concentration of 510 ,ug/l No other fuel oxygenated compounds were detected <br /> during the laboratory analysis The laboratory reports (McCampbell Analytical Inc Lab I D 65337 <br /> and Castle Analytical Laboratory Reference No 3664) and chain-of-custody forms are presented in <br /> Appendix J <br /> lie 3 3 PURGED GROUND WATER DISPOSAL <br /> On 25 April 2001, the ground water extracted during the pumping test was pumped from the <br /> ' aboveground storage Baker tank into a vacuum truck(supplied by American Valley Waste OiI), the <br /> purged water was transported off-site under hazardous waste manifest to Industrial Service Oil Co <br /> Inc , a waste treatment facility located in Los Angeles, California Documentation and uniform <br /> hazardous waste manifest for disposal of the pump test purged water is contained in Appendix K <br /> 4.0 SUMMARY AND CONCLUSIONS <br /> First Water Zone ground water was informally identified in Cone Penetrometer Testing Site <br /> ' Investigatin - Fourth Quarter 2000, dated 07 February 2001 as a potential hydrogeologic unit <br /> between 15 and 47 feet bsg <br /> 1 The implications from the April 2001 aquifer ground water pumping test are <br /> • Ground water draw-down of at least 2 27 feet was observed in extraction well EW-1 <br /> ' following 7 hours of continuous pumping operation (6 GPM), ground water draw-down was <br /> observed in well MW-6(located 8 feet to the north) at 0 53 feet, well MW-2 (located 18 feet <br /> toward the north) at 0 40 feet, well MW-3 (located 46 feet toward the north-northwest) at <br /> 0 19 feet and in well MW-1 (located 49 feet toward the south) at 0 21 feet (Appendices C, <br /> 4dvanced GeoEnrvonmenta1 Jnc <br /> I <br />