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<br />' TABLE 4
<br /> ANALYTICAL RESULTS OF HISTORICAL GROUND WATER SAMPLES
<br />' EPA METHODS 8015M, 8020
<br /> Former Chase Chevrolet (Van Buren) Facility
<br />' 424 North Van Buren Street, Stockton, California
<br /> Sample
<br /> eSample Depth to TPH as Ethyl-Location Xylene
<br />' (Screen)
<br /> Date Water Gasoline MTBE Benzene Toluene benzene
<br /> MW-7 1-10-91 2681 3,000 --- 280 270 50 470
<br /> (20-7-45) 2-27-92 2808 21,000 --- 730 450 360 880
<br /> 5-28-92 2778 53,000 =__ 2,000 860 1,200 2,400
<br /> 9-16-92 2823 11,000 560 650 230 960
<br /> 11-5-92 2854 8,400 --- 580 580 240 840
<br /> 2-11-93 2822 19,000 --- 850 600 400 970
<br /> 2-8-94 2741 11,000 1,700 640 890 1,800
<br /> 5-4-94 2741 13,000 --- 1,300 1,100 670 2,500
<br /> 8-5-94 2709 2,700 --- 330 190 170 530
<br /> 12-20-94 27 66 13,000 1,200 900 600 2,400
<br /> 5-11-95 2436 23,000 --- 1,000 1,200 960 4,400
<br /> . 10-5-95 2329 20,000 -�� 370 370 790 3,200
<br /> 2-9-96 2295 27,000 910 800 1,100 5,400
<br /> 5-8-96 2101 15,000 20 250 97 660 2,700
<br /> 8-8-96 2084 24,000 <40 640 140 1,000 3,800
<br /> 11-6-96 2131 14,000 <10 290 87 510 1,900
<br /> 2-5-97 1625 6,700 <13 85 11 230 540
<br /> 5-7-97 1842 4,500 <5 0 130 25 190 450
<br /> 8-6-97 1861 1,800 6.3 95 9 0 140 140
<br /> 11-5-97 1936 2,300 <5 84 8 8 140 240
<br /> 2-5-98 1636 5,100 <12 56 3 8 230 170
<br /> 5-8-98 1408 1,500 <5 0 59 10 92 190
<br /> I 8-13-98 1468 2,400 <10 70 16 110 290
<br /> 11-4-98 1644 4,000 <10 160 56 270 650
<br /> 2-4-99 1583 1,400 <5 0 42 2 9 110 130
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<br /> Advanced GcoEnvironmental,Inc
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