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TABLE 3 ANALYTICAL RESULTS OF HISTORICAL GROUND WATER SAMPLES Chase Chevrolet - Madison 423 North Madison Street, Stockton, California Sample Sample , Depth to TPH as TPH as TPH as " ~ Location _ - R MTBE Benzene_ i Toluene, y Xylenes Date Water_ Gasollne Diesel Motor Oil _benzene 1_,w-,,� screen - MW-21A 8-12-98 1318 9,000 7,800 320 - --- 210 55 230 47 (12-32) 11-3-98 1476 3,200 18,000 1,200 <10 170 2 7 160 39 2-2-99 1419 4,200 6,500 500 <10 240 <0 5 210 45 5-5-99 13 53 5,200 8,900 <250 <5 0 170 3 0 140 31 8-11-99 1390 2,900 8,600 <250 <10 190 4 7 120 27 11-9-99 15 13 <50 110 <250 <5 0 <0 5 <0 5 <0 5 <0 5 2-8-00 1458 1 3,800 3,100 810 <18 1,500 38 1,200 66 MW-19B 8-12-98 1580 <50 360 790 --- <0 5 <0 5 <0 5 <0 5 (485-53 5) 11-3-98 17 13 <50 100 <250 <5 0 <0 5 078 <0 5 072 2-2-99 1659 <50 130 <250 <5 0 <0 5 <0 5 <0 5 <0 5 5-5-99 15 59 <50 <50 <250 <5 0 1 2 4 6 1 5 68 8-11-99 1636 <50 <50 <250 <5 0 068 2 2 13 51 11-9-99 1741 <50 <50 <250 <5 0 <0 5 <0 5 <0 5 <0 5 2-8-00 1690 <50 53 <250 <5 0 <0 5 --05 <0 5 <0 5 MW-20B 8-12-98 1632 <50 710 520 --- <0 5 056 <0 5 <0 5 (50-55) 11-3-98 1762 <50 140 <250 <5 0 <0 5 <0 5 <0 5 <0 5 2-2-99 17 11 <50 120 <250 <5 0 <0 5 057 <0 5 <0 5 5-5-99 16 15 140 190 <250 <5 0 6 5 _ 21 5 3 25 8-11-99 1680 54 <50 <250 <5 0 0 61 1 7 069 2 7 11-9-99 1790 490 290 330 <5 0 0 63 _<0 5 2 7 2 6 2-8-00 1743 <50 210 <250 <5 0 <0 5 <0 5 <0 5 <0 5 MW-21B 8-12-98 1504 2,60€1 1,600 <250 --- 20 3 5 67 27 (48-53) 11-3-98 1644 2,200 1,600 320 <5 0 12 1 2 49 26 2-2-99 15 87 1,300 1,200 <250 <5 0 8 0 <0 5 49 13 5-5-99 15 66 1,300 700 <250 <5 0 8 6 17 29 28 8-11-99 1582 1,400 700 <250 <5 0 <1 1 5 16 8 6 11-9-99 1670 <50 <50 <250 <5 0 <0 5 <0 5 <0 5 <0 5 2-8-00 1 1567 1 800 460 1 330 1 6 0 1 24 <0 5 1 41 1 16 µgA micrograms per leer equivalent to parts per billion ppb Concentrations determined by LPA Methods 5030 8015m and 8020 Advanced CeoEm rronmental,Inc