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• i • TABLE 2 ANALYTICAL RESULTS OF GROUND WATER SAMPLES EPA Method 80151802018260 Modified Former Curtiss Pontiac-Buick - 2450 Toste Road, Tracy, California (Ug/1) Well Sarn le Depth to i_Isopr6pyl ethyl methyl erhary amyl I D P p TPII- TPH cl Benzene Toluene Ethyl Xylenes ether tertiary terttary- tertiary butyl [date GW g benzene y butyl ether butyl ether ethyl et)er alcohol(TBA) Screen DIl'1s MTBE MTBB (TANS MW-lA 02-27-98 490 4,300 1,400 200 41 2 9 560 <5 0 <5 0 <5 0 <5 0 <5 0 23-28 09-28-98 7 06 220 <50 15 3 7 4 5 17 <1 0 <1 0 <1 0 <1 0 <5 0 12-17-98 6 86 58 <50 4 2 3 1 2 0 3 0 <1 0 <1 0 <1 0 <1 0 <5 0 03-25-99 6 89 71 <50 081 093 1 2 0 82 <1 0 <1 0 <1 0 <1 0 <5 0 06-21-99 709 200 68 16 21 4 4 21 <1 0 <1 0 <1 0 <1 0 <5 0 09-21-99 694 63 <50 5 7 39 <0 5 2 5 <l 0 <1 0 <1 0 <1 0 <S 0 12-07-99 697 <50 <50 2 1 0 83 <0 S 17 <1 0 <1 0 <1 0 <1 0 <5 0 03-17-00 6 78 <50 <50 <0 5 <0 5 <0 5 <0 5 <1 0 <1 0 <1 0 <1 0 <5 0 07-17-00 702 <50 <50 12 <0 5 <0 5 <0 5 --- --- --- --- 10-17-00 6 65 <50 <50 3 1 4 3 088 4 7 <1 0 <1 0 <1 0 <1 0 <5 0 01-30-01 673 <50 52 12 056 0 85 2 4 <1 0 <1 0 <1 0 <1 0 <5 0 04-2S-01 693 <50 <SO <0 5 <0 5 <0 5 <0 5 1 <1 0 <1 0 <1 0 <1 0 <5 0 MWAB 02-27-98 525 5,000 1,200 480 140 8 9 600 <S 0 <5 0 <5 0 <5 0 <5 0 5-15 09-28-98 7 01 2,000 160 530 260 55 130 <1 0 <1 0 9 9 <1 0 <5 0 12-17-98 702 560 93 270 36 13 22 <1 0 <1 0 14 <1 0 <5 0 03-25-99 688 3,600 290 1,300 120 110 88 <5 0 <1 0 23 <1 0 <5 0 06-21-99 700 3,400 130 740 400 59 220 <1 0 <1 0 13 <1 0 <5 0 09-21-99 690 2,400 210 540 200 58 120 <1 0 <1 0 30 <1 0 <5 0 12-07-99 705 1,300 84 390 79 31 55 <1 0 <1 0 8 9 <1 0 <5 0 03-17-00 6 62 190 <50 78 19 3 0 21 <1 0 <1 0 8 3 <1 0 <5 0 07-17-00 6 92 610 66 110 49 17 44 --- - --- --- --- 10-17-00 669 120 <50 29 12 21 5 2 <1 0 <1 0 5 0 <1 0 <5 0 01-30-01 702 1,800 140 710 39 48 16 <1 0 <1 0 20 <1 0 <5 0 04-25-01 6 87 1,300 84 1 400 27 43 22 <1 0 <1 0 12 <1 0 1 <5 0 i Advanced GeoEnvnronmental Inc