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TABLE 2 ANALYTICAL RESULTS OF GROUND WATER SAMPLES EPA Method 80151802018260 Modified Former Curtiss Pontiac Buick - 2450 Toste Road, Tracy, California (A911) ethyl methyl tertiary dl- tertiary tertiary- �,yl tertiary Well Sample Depth to Ethyl- isopropyl butyl TPH- TPH-d Benzene Toluene Xylenes butyl butyl methyl I D Date GW !S benzene ether ether ether ether alcohol (DIFF} ETBE MTBE TANTE (TI M W-1 A 02-27-98 490 4,300 1,400 200 41 2 9 1 560 <5 0 <5 0 <5 0 <5 0 <5 0 09-28-98 706 220 <50 15 3 7 4.5 1.7 <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 <l 0 <1 0 <1 0 <5 0 03-25-99 6 89 71 <50 0.81 0 93 1.2 0.82 <1 0 <10 <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 09-21-991 694 63 <50 5.7 1 3.9 <0 5 2.5 <1 0 <1 0 <1 0 <1 0 <5 0 MW-1B 02-27-98 525 5,000 1,200 480 140 8.9 600 <5 0 <5 0 <5 0 <5 0 <5 0 09-28-98 701 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 <1 0 30 <1 0 <5 0 MW-2A 02-27-98 5 55 <50 <50 <0 5 <0 5 <0 5 <0 5 <5 0 <5 0 <5 0 <5 0 <5 0 09-28-98 700 <50 <50 <0 5 <0 5 <0 5 <0 5 <1 0 <1 0 <1 0 <1 0 <5 0 12-17-98 704 <50 <50 <0 5 <0 5 <0 5 <0 5 <1 0 <1 0 <1 0 <1 0 <5 0 03-25-99 6 89 <50 <S0 <0 5 <0 5 <0 5 <0 5 <5 0 <1 0 <1 0 <1 0 <5 0 06-21-99 704 57 <50 1.5 6.4 14 7.5 <1 0 <1 0 <1 0 <1 0 <5 0 09-21-99 692 <50 <50 <0 5 1 <0 5 1 <0 5 1 <0 5 1 <1 0 1 <1 0 1 <1 0 1 <1 0 <5 0 Notes C Ground water depth measurements in feet 4%A mtctogtams pct lttet of parts per billion,ppb TPH-g Total petroleum hydrocarbons quantified as gasoline TPH-d Total petroleum hydrocarbons quantified as diesel *ground water sample collected from 2420 Grant Line Road Concentrations in Italics indicate suspected cross-contamination Advanced GeoEnvironmental lint