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TABLE 2 ANALYTICAL RESULTS OF GROUND WATER SAMPLES EPA Method 84151802018260 Modified Fortner Curtiss Pontiac-Buick - 2450 Toste Road, Tracy, California Welldi-isopropyl ethyl methyl ertiary amyl r 1 D Sample Depth to TPH-g TPH-d Benzene Toluene Ethyl- Xylenes ether tertiaty tertiary- ethyl ether tertiary butyl Scre.en Date GW benzene B,E butyl ether butyl ether alcohol(TBA) } ETBE MTBE(TAME) MW-6 02-27-98 09- 605 <50 <50 <0 5 <0 5 <0 5 <0 5 <5 0 <5 0 <5 0 <5 0 <5 0 5-15 28-98 768 <50 <50 <0 5 <0 5 <0 5 <0 5 <1 0 <1 0 <1 0 <1 0 <5 0 12-17-98 764 <50 <50 <0 5 <0 5 <0 5 <0 5 <1 0 <1 0 <1 0 <1 0 <5 0 03-25-99 753 <50 <50 <0 5 <0 5 <0 5 <0 5 <5 0 <1 0 <1 0 <1 0 <5 0 06-21-99 765 <50 <50 12 40 069 37 <1 0 <1 0 <1 0 <1 0 <5 0 69-21-99 754 <50 <50 <0 5 <0 5 <0 5 <0 5 <1 0 <1 0 <1 0 <1 0 <5 0 12-07-99 768 <50 <50 <0 5 <0 5 <0 5 <0 5 <1 0 <1 0 <1 0 <1 0 <5 0 03-17-00 724 <50 <50 <0 5 <0 5 <0 5 <0 5 <1 0 <1 0 <1 0 <1 0 <5 0 07-17-00 758 <50 <50 <0 5 <0 5 <0 5 <0 5 <1 0 <1 0 <1 0 <1 0 <5 0 10-17-00 728 <50 <50 058 16 093 50 <1 0 <1 0 <1 0 <1 0 <5 0 01-30-01 767 <50 <50 <0 5 <0 5 <0 5 <0 5 <1 0 <1 0 <1 0 <1 0 <5 0 04-25-01 751 <50 <50 1 <0 5 <0 5 <0 5 <0 5 1 <1 0 <1 0 <1 0 <1 0 <5 0 MW-7 12-07-99 1070 6,900 2,800 310 180 130 70 <100 <100 <100 <100 1,200 37-42 03-17-00 908 1,100 1,100 46 12 86 77 <1 0 <1 0 21 <1 0 <5 0 07-17-00 23 15 260 290 091 33 <0 5 <0 5 _._ 10-17-00 962 250 230 11 92 61 25 <1 0 <1 0 <1 0 <1 0 <5 0 01-30-01 1686 150 220 26 46 35 90 <1 0 <1 0 <1 0 <1 0 <5 0 04-25-01 721 <50 130 <0 5 066 <0 5 <0 5 <1 0 <1 0 <1 0 <1 0 <5 0 GLMW 01-30-98 — <50 <50 <0 5 <0 5 <0 5 <0 5 -- — — -- -3* 09-28-98 864 <50 <50 27 16 <0 5 <0 5 <1 0 <1 0 <1 0 <1 0 <5 0 10-20 12-17-98 873 <50 <50 <0 5 <0 5 <0 5 <0 5 <1 0 <1 0 <1 0 <1 0 <5 0 03-25-99 8 61 <50 <50 <0 5 <0 5 <0 5 <0 5 <1 0 <1 0 <1 0 <1 0 <5 0 06-21-99 880 <50 <50 <0 5 <0 5 <0 5 <0 5 <1 0 <1 0 <1 0 <1 0 <5 0 09-21-99 946 <50 <50 <0 5 <0 5 <0 5 <0 5 <1 0 <1 0 21 <1 0 <5 0 12-21-99 886 <50 <50 <03 <0 5 <0 5 <0 5 <1 0 <1 0 <1 0 <1 0 <1 0 03-17-00 839 <50 <50 <0 5 <0 5 <0 5 <0 5 <1 0 <1 0 <1 0 <1 0 <5 0 07-17-00 865 <50 <50 <0 5 <0 5 <0 5 <0 5 <1 0 <1 0 <1 0 <1 0 <5 0 10-17-00 833 160 130 79 91 66 27 <1 0 <1 0 <1 0 <1 0 <5 0 12-19-00 866 <50 <50 <0 5 <0 5 <0 5 <0 5 <1 0 <1 0 <1 0 <1 0 <5 0 01-30-01 865 <50 <50 <0 5 <0 5 <0 5 <0 5 <1 0 <1 0 <1 0 <1 0 <5 0 03-23-01 8 61 1 <50 <50 I <0 5 1 <0 5 1 <0 5 1 <0 5 1 <1 0 1 <1 0 1 <1 0 1 <1 0 1 <5 0 Notes " ground water sample collected from monitoring wail GLMW-3 at 2420 Grant Line Road TPH-g total petroleum hydrocarbons quantified as gasoline,uglk micrograms per liter or parts per billion,ppb TPH-d total petroleum hydrocarbons quantified as diesel Concentrations in italics indicate suspected cross-contaminations Advanced CeoEnvironmental Inc