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f TABLE 2 ANALYTICAL RESULTS OF GROUND WATER SAMPLES ANALYZED BY EPA METHODS 8015 AND 8020 STOCKTON PLATING 632 South E1 Dorado, Stockton, California (µg11) Sample I D! TPH as gasoline MTBE Benzene Toluene Ethyl benzene Xylenes j Date ' MW 1110-24-94 <50 NA <0 3 <0 3 <0 3 <0 3 MW 1105-23-95 320 NA 64 0 52 <0 5 066 M W 1/09-29-95 130 NA 16 13 <0 5 <0 5 ' MW1/12-21-95 51 NA <0 5 <0 5 <0 5 <0 5 MW2/10-24-94 <50 NA 0 72 <0 3 0 54 081 MW2/05-23-95 260 NA 0 71 <0 5 1 1 085 ' MW2/09-29-95 120 NA <0 5 <0 5 <0 5 <0 5 MW3/10-24-94 12,000 NA 8,800 1,300 820 450 MW3/05-23-95 13,000 NA 5,300 160 640 220 ' MW3/09-29-95 3,200 NA 1,100 18 270 30 MW3/12-21-95 3,200 NA 800 15 190 17 MW3/03-08-96 1,300 35 330 15 99 29 MW3/09-18-96 700 21 140 0 86 39 22 ' MW3/03-12-97 100 71 4 5 080 16 13 MW3/06-27-97 110 93 10 <0 5 <0 5 <0 5 MW3/09-08-97 110 14 1 1 0 82 067 096 MW3/06-19-98 110 <20 <0 5 067 <0 5 <0 5 Ile MW3/09-22-98 220 <40 2 4 14 3 8 16 MW3/12-11-98 390 <20 53 47 12 54 MW3/03-24-99 460 <20 94 39 12 56 ' MW4112-06-94 320 NA 1 1 <0 3 0 4 <0 3 MW4/05-23-95 <200 NA <1 0 <1 0 <1 0 <1 0 MW4/09-29-95 <50 NA <0 5 <0 5 <0 5 <0 5 MW4112-21-95 71 NA <0 5 <0 5 <0 5 <0 5 ' MW4/03-08-96 54 <5 0 <0 5 <0 5 <0 5 <0 5 MW4/06-03-96 <50 6 7 <0 5 <0 5 <0 5 <0 5 MW4/09-18-96 60 <5 0 <0 5 <0 5 <0 5 <0 5 ' MW4/12-16-96 <50 <5 0 <0 5 <0 5 <0 5 <0 5 MW4/03-12-97 58 6 4 <0 5 <0 5 <0 5 <0 5 MW4/06-27-97 87 85 <0 51 <0 5 <0 5 <0 5 MW4/09-08-97 <50 <5 0 0 78 32 <0 5 3 8 MW4/12-12-97 78 <5 0 <0 5 066 <0 5 12 1 MW4/03-19-98 <50 <5 0 <0 5 <0 5 <0 5 <0 5 MW4l06-19-98 - <50 <20 <0 5 <0 5 <0 5 <0 5 MW4/09-22-98 150 <30 41 4 7 4 7 21 MW4/12-11-98 450 <20 15 95 17 78 1 MW4/03-24-99 730 1 <20 t 29 1 100 1 25 1 120 Notes µg/l micrograms per Iiter,approximately equivalent to parts per billion,ppb 1 MTBE methyl tertiary butyl ether by EPA method 8020 NA Not analyzed -- not measured • Ground Hater depth measurements are in feet 1 i 1 _ Advanced GeoEnvironmental,Inc. 1