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• 05 <br /> HISTORICAL GROUNDWATER ANALYTICAL DATA <br /> Cohn Property <br /> Stockton,Calrfomla <br /> Sample Date of 7P-as Aromatic Volatile Organlcs Seven Fuel Oxygenates <br /> ID Sampling Gasoline Benzene Toluene Ethyl Total DIPS ETBE I MTBE TAME I TBA Methanol Ethanol <br /> Benzene Xylenes <br /> (pWL) !L L L !L L !L tL L <br /> PZ is(d) 9!26101 310 000 46 000 47 000 3 400 17,000 <250 <250 <250 <250 <2 500 — <br /> 12/11/01 270 000 37 000 33 000 2 300 13 000 <400 <400 000 <400 <4 000 — — <br /> 12117/01 320 000 52 000 45 D00 3 300 19 000 <1 000 <1 000 <1 000 <1 ODD <10 000 — <br /> 12/27/01 290 000 51 000 42 000 3 400 111001 <1 000 <1 ODD <1 000 <1 000 <10 OM <br /> 1/3102 290 000 45 000 36 000 3 000 17 000 <1 000 <1 D00 <1 000 <1 000 <10000 — — <br /> 124102 400 000 45 000 53 000 4 400 23 000 <1 000 <1 ODD 0 000 <1 000 <1113000 — <br /> 313103 440 000 50 OOD 48 000 3 100 22 000 <500 <5DO <50o <500 <5 000 — — <br /> PZ 1b(D) 9/26101 310000 35 000 47 000 3 400 18 DOD <250 <250 <250 <250 <2 500 — <br /> 12111/01 310 000 36 000 46 000 3 100 17,000 <400 <400 <4DO <400 <4 DOD — <br /> 12117/01 290 000 37 ODD 51 ODD 3 300 18 000 <1 000 <1 000 <1 000 <1 000 <10 000 — <br /> 12127101 300 000 43 000 53 000 3 800 21 000 <1 000 <1 000 <1 000 <1 000 <10 000 — — <br /> 113102 3130 DOO 36 000 46 000 3 100 17 000 <1 DOO <1 000 <1 000 <1 000 <10 000 — <br /> 1214l02 360 000 36 000 53 ODO 4 100 23 000 <1 DOO <1 000 <1 000 <1 000 <10 000 — <br /> 313103 430 000 39 000 57 000 3 400 24 000 <500 <500 <500 <500 <5 000 — — <br /> Notes <br /> TPH Total Petroleum Hydrocarbon --- blot Analyzed <br /> DIPE-Dr-Isopropyl Ether 1CC(Effluent) sample collected between the first and second carbon vessels fillenng the facrli ys water <br /> ETBE Ethyl Tertiary"Ether 2CC(Effluent) sample collected after both carbon vessles filtering the facility's water <br /> MTBE Methyl Ternary Butyl Ether pg1L mcrograrns per liter <br /> TAME Tertiary Amyl Methyl Ether <br /> TBA Tertiary Butyl Ether <br /> 1 2 DCA 12 Dichloroethane <br /> EDB Ethyl Dlbromde <br /> APEXENVIROTECH INC <br /> Page 10 or 10 SECOND QUARTER 2006 <br /> C0H58 001 <br />