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TAA
<br /> HISTORICAL GROUNDWATER ANALYTICAL DATA
<br /> Cohn Property
<br /> Stockton,California
<br /> Sample [late of TPH as Aromatic Volatile Or anics Seven Fuel O enates
<br /> IU Sampling Gasoline Benzene Toluene Ethyl- Total DIPE ETRE MTBE TAME TBA Ethanol Methanol
<br /> Benzene Xylenes
<br /> !L !L !L !L !L !L L 1L 1L !L (Vg/I-) L
<br /> PZ-1a(d) 9126101 310,000 46,000 47 000 3 400 17,000 <250 <250 <250 <250 <2,500
<br /> 12111!01 270,000 37 000 33 000 2 300 13 000 <400 <400 <400 <400 <4,000
<br /> 12/17101 320,000 52,000 45000 3,300 19000 <1000 <1,000 <1,000 <1,000 <10,000
<br /> 12127!01 290,000 51,000 42 000 3,400 19 000 <1,000 <1 000 <1,000 <1 000 <10 000
<br /> 113102 290,000 45,000 36 000 3,000 17,000 <1 000 <1,000 <1 000 <1 000 <10,000
<br /> 1214102 400,000 45 000 53 000 4 400 23 000 <1 000 <1,000 <1,000 <1,000 <10,000
<br /> 313103 440 000 50 000 48 000 3 100 22 000 <500 <500 <500 <500 <5 000 -- --
<br /> PZ-1b(D) 9126101 310 000 35 000 47 000 3 400 18,000 <250 <250 <250 <250 <2 500
<br /> 12!11101 310 000 36 000 46,000 3,100 17 000 <400 <400 <400 <400 <4 000
<br /> 12117/01 290,000 37 000 51 000 3 300 18,000 <1,000 <1,000 <1,000 <1,000 <10 000
<br /> 12127/01 300 000 43 000 53 000 3,800 21,000 <1 000 <1,000 <1 000 <1 000 <10 000
<br /> 113102 300,000 36,000 46 000 3 100 17 000 <1 000 <1 000 <1,000 <1 000 <10 000
<br /> 1214102 360 000 36 000 53 000 4 100 23 000 <1 000 <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 - Not Analyzed
<br /> DIPE-Di-isopropyl Ether 1 CC(Effluent)-sample collected between the first and second carbon vessels fiftenng the faahtys water
<br /> ETBE Ethyl Tertiary Butyl Ether 2CC(Effluent)-sample collected after both carbon vessles fiftenng the facilitys water
<br /> MTBE Methyl Tertiary Butyl Ether pg1L-micro-grams per niter
<br /> TAME-Tertiary Amyl Methyl Ether
<br /> TBA-Terhary Butyl Ether
<br /> APEX ENVIROTECH INC
<br /> SECOND QUARTER 2005
<br /> Page 9 of 9 COH01 001
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