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� i•■■ � s � .w l� TABLE 2 ANALYTICAL RESULTS OF GROUND WATER SAMPLES EPA Method 80151802018260 Modified Former Curtiss Pontiac-Buick- 2450 Toste Road, Tracy, California di- ethyl methyl tertiary Wellamyl tertiary butt' Sample Depth to Ethyl- isopropyl tertiary tertiary- amyl. TPH-d Benzene Toluene Xylenes methyl alcohol Screen Date GW benzene ether butyl ether butyl ether ether (TBA) (DIPE) (ETBE) (MTBE) TAME 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 09-28-98 706 220 <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 31 2 0 3 0 <1 0 <1 0 <10 <1 0 <5 0 03-25-99 6 89 71 <50 081 0 93 12 0.82 <1 0 <1 0 <10 <1 0 <5 0 06-21-99 7 09 200 68 16 21 4 4 21 <1 0 <1 0 <1 0 <1 0 <5 0 09-21-99 694 63 <50 57 3 9 <0 5 25 <1 0 <1 0 <1 0 <1 0 <5 0 12-07-99 697 <50 <50 2.1 0 83 <0 5 17 <1 0 <1 0 <1 0 <1 0 <5 0 03-17-00 678 <50 <50 <0 5 <0 5 <0 5 <0 5 <1 0 <1 0 <1 0 <1 0 <5 0 07-17-00 7 02 <50 <50 1.2 <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 0 56 0.85 2 4 <1 0 <1 0 <1 0 <1 0 <5 0 04-25-01 693 <50 <50 <0 5 <0 5 <0 5 <0 5 <1 0 <1 0 <1 0 <1 0 <5 0 07-27-01 699 <50 <50 <0 5 <0 5 <0 5 <0 5 <1 0 <1 0 <1 0 <1 0 <5 0 10-24-01 7 04 1 <50 1 <50 <0 5 1 <0 5 1 <0 5 1 <0 5 1 <1 0 <1 0 <1 0 1 <1 0 <5 0 Nates Ground water depth measurements in feet , go Tmcrogratns per bler or parts per billion,ppb TPII-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 Inc