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4r TABLE 3 ANALYTICAL RESULTS OF HISTORICAL GROUND WATER SAMPLES Chase Chevrolet- Madison 423 North Madison Street, Stockton, California {�cgli} arra � , " h,— r ; — , — c e� �,,d •• eg—"' � r -. "`r .. x "r a — , 9 i ., � �€fir^` "� —� i�...... = Sample - Loca ion Sample 1 Depth to , TPH as TPH as TPH as g MTBE Benzene Toluene Ethyl- ° ` Xylenes (screen) Date Water Gasoline Diesel Motor Oil m - benzene MW-19A 8-12-98 1329 <50 780 460 --- <0 5 <0 5 <0 5 <0 5 (11-3I) 11-3-98 1481 <50 180 <250 <5 0 <0 5 <0 5 <0 5 <0 5 2-2-99 1428 <50 310 <250 <5 0 <0 5 <0 5 <0 5 <0 5 5-5-99 13 63 <50 140 <250 <5 0 <0 5 1.5 <0 5 19 MW-20A 8-12-98 14 75 <50 92 <250 --- <0 5 <0 5 <0 5 <0 5 (12-32) 11-3-98 1623 <50 200 <250 <5 0 <0 5 <0 5 <0 5 <0 5 2-2-99 1574 <50 170 <250 <5 0 <0 5 <0 5 <0 5 <0 5 5-5-99 1501 <50 130 <250 <5 0 <0 5 13 <0 5 1.8 MW-21A 8-12-98 13 18 9,000 7,800 320 --- 210 5.5 230 47 (12-32) 11-3-98 1476 3,200 18,000 1,200 <10 170 27 160 39 2-2-99 14 19 4,200 6,500 500 <10 240 <0 5 210 45 5-5-99 1353 5,200 8,900 <250 <5 0 170 3 0 140 31 MW-19B 8-12-98 1580 <50 360 790 --- <0 5 <0 5 <0 5 <0 5 (485-53 5) 11-3-98 1713 <50 100 <250 <5 0 <0 5 0 78 <0 5 072 2-2-99 16 59 <50 130 <250 <5 0 <0 5 <05 <05 <05 5-5-99 1559 <50 <50 <250 <5 0 12 4.6 15 6.8 MW-20B 8-12-98 1632 <50 710 520 --- <0 5 0 56 <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 <50 120 450 <5 0 <0 5 0 57 <0 5 <0 5 5-5-99 16 15 140 190 <250 <5 0 6 5 21 5 3 25 MW-2IB 8-12-98 1504 2,600 1,600 <250 --- 20 3.5 67 27 (48-53) 11-3-98 1644 2,200 1,600 320 <5 0 12 12 49 26 2-2-99 1587 1,300 1,200 <250 <5 0 80 <0 5 49 13 5-5-99 1 1566 1 1,300 1 700 1 <250 1 <5 0 1 8.6 L 17 29 28 µg1] micrograms per liter,equivalent to parts per billion,ppb Concentrations determined by EPA Methods 5030 8015m and 8020 Advanced GeoEnvironmental,Inc.