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r <br /> Petroleum Hydrocarbons as diesel (TPHd), Total Petroleum Hydrocarbons as gasoline <br /> (TPHg), Benzene, Toluene, Ethyl benzene and Xylene (BTEX), Lead scavengers (1,2- <br /> DCA and EDB), and Oxygenates Including Ethanol and Methanol Samples were <br /> analyzed by Kiff Analytical of Davis, California, a Department of Health Services <br /> (DHS)-certified laboratory <br /> 3.0 LABORATORY ANALYTICAL RESULTS <br /> i <br /> The highest detection of MTBE encountered was 730 ppb found in MW-2, located <br /> northeast of the former tank pit on the northern boundary of the subject property The <br /> second highest detection of MTBE was 110 ppb found in groundwater monitoring well <br /> MW-3 located east of the former tank pit on the northern boundary of the subject <br /> i property TAME was also detected in wells MW-2 and MW-3 The following table <br /> shows the detections in this monitoring event and the previous monitoring events <br /> TPH as diesel was detected in MW-1, at a level of 110 ppb and in MW-4, at a level of <br /> 150 ppb <br /> 1 TABLE I <br /> SUMMARY OF GROUNDWATER ANALYTICAL RESULTS <br /> TOTAL PETROLEUM HYDROCARBONS BTEX and MTBE <br /> ALL RESULTS ARE IN ug/L j <br /> . (Bold designates most recent measurements) <br /> 1 <br /> Monitalns Date TOTAL PETROLEUM AR(3MATICY0JlAT1U ORGANIC AND OXYGENATES <br /> welt colteaed "YMOCADONS <br /> CA50UNE DIESER BENZENE TOLUENE ETN1'E %YLENE TAMF TeAavu wl I+sM t 3 OGa <br /> BENZENt; FthanoE xnd Etl6 <br /> Melhanet <br /> MW-1 2/12100 440 120 31 NO 05T 110 16 170 240 MTBE NO <br /> 1 4128/00 NO NO NO NO NO ND 25 610 3,800 MTBE NO <br /> 9/20/00 NO NO NO NO NO ND 10 16 160 MTBE ND <br /> 12/27/00 NO NO NO NO ND NO 063 NO 150 MTBE ND <br /> 7/30101 NO 100 NO NO NO NO ND NO 40 MTBE NO <br /> 1 1115101 ND 110 ND ND ND ND ND ND 38 MTBE ND <br /> MW-2 2/12/00 ND NO NO ND NO NO 150 130 1,800 MTBE ND <br /> 4128/00 NO 64 ND ND NO NO 16 84 290 MTBE NO <br /> 9/20/00 NO ND NO NO NO NO 73 28 980MT8E NO <br /> 1 <br /> 12/27/00 NO NO ND NO NO NO 44 NO 720 MTBE NO <br /> 7130101 NO NO ND NO ND NO 11 ND 340 MTBE ND <br /> 1115/01 ND:::d ND ND ND ND ND 20 ND 730 MTBE ND <br /> MW-3 2/12/00 1 ND ND NO NO ND NO NO NO 1 6 MTBE NO <br /> 1 <br /> • Avalon Environmental Consultants <br /> Protect#9627-001-8 <br /> Joe's Truck Plaza <br /> 15600 South Harlan Road <br /> December 5, 2001 2 Lathrop, California <br /> 1 <br />