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Table 1 Page 1 of 3 Pages
<br /> Groundwater Monitoring Data + .
<br /> ARCO Service Station 2168,411 Charter Way,Stockton,California
<br /> Well Elevation Static Elevation
<br /> Sample of Top Water of Total
<br /> Number Date of Casing Level Groundwater TPHG Benzene Toluene Ethylbenzene Xylenes Observations
<br /> MW-1
<br /> W-40-MW-1 05/11/92 10.45 40.27 -29.82 60,000 5,900 1,600 430 800 No FP, No S,Yes O
<br /> MW-1(54) 08/24/92 10.45 42.06 -31.61 14,000 4,100 330 310 490 No FP, No S,Yes O
<br /> MW-1(54) 12/17/92 10.45 42.79 -32.34 14,000 3,500 410 400 800 No FP, No S,Yes O
<br /> MW-1(54) 03/10/93 10.45 40.42 -29.97 28,000 6,500 340 580 1,700 No FP, No S,Yes O •
<br /> MW-1(54) 06/10/93 10.45 38.58 -28.13 23,000 5,600 640 470 1,400 No FP, No S,Yes O
<br /> MW-1(54) 09/02/93 10.45 39.50 -29.05 27,000 7,500 700 620 2,300 No FP, No S,Yes O
<br /> MW-1(54) 10/28/93 10.45 39.73 -29.28 31,000 8,900 1,200 830 2,300 No FP,No S,Yes O
<br /> MW-1(39) 03/23/93 10.45 39.23 -29.78 34,000 \ 8,300 630 740 2,400 No FP, No S.Yes O
<br /> MW-1(39) 06/29/94 10.45 39.02 -28.57 36,000 11,000 11,500 840 3,300 No FP, No S,O=NE
<br /> MW-1(41) 09/26/94 10.45 40.25 -29.80 34,000 6,000 490 550 1,400 No FP, No S,O=NE
<br /> MW-1(41) 12/01/94 10.45 40.41 -29.96 60,000 j' 7,100 1,000 290 710 No FP, No S,O=NE
<br /> MW-1(54) 02/16/95 10.45 37.11 -26.66 36,000 11,000 460 990 3,200 No FP, No S,O=NE
<br /> MW-2
<br /> W-40-MW-2 05/11/92 10.83 40.63 -29.80 14,000 2,100 160 <50 1,100 No FP, No S,Yes O
<br /> MW-2(53) 08/24/92 10.83 42.44 -31.61 12,000 2,400 1,100 110 600 No FP, No S,Yes O
<br /> MW-2(53) 12/17/92 10.83 43.18 -32.35 13,000 2,500 1,500 190 880 No FP, No S,Yes O
<br /> MW-2(53) 03/10/93 10.83 40.77 -29.94 16,000 3,300 1,500 210 100 No FP,No S,Yes O
<br /> MW-2(53) 06/10/93 10.83 38.94 -28.11 19,000 3,700 1,800 280 1,100 No FP, No S,Yes O
<br /> MW-2(53) 09/02/93 10.83 39.86 -29.03 18,000 3,300 1,800 260 1,200 No FP, No S,Yes O
<br /> MW-2(53) 10/28/93 10.83 40.09 -29.26 17,000 3,600 2,300 320 1,500 No FP,No S,Yes O
<br /> MW-2(39) 03/23/93 10.83 39.61 -28.78 29,000 4,100 2,800 410 1,600 No FP, No S,Yes O
<br /> MW-2(39) 06/29/94 10.83 39.40 -28.57 23,000 i 4,400 2,600 330 1,500 No FP,S=NE,O=NE
<br /> MW-2(41) 09/26/94 10.83 40.64 -29.81 22,000 2,300 1,200 <0.5 850 No FP,S=NE,O=NE
<br /> MW-2 12/01/94 10.83 40.83 -30.00 31,000 4,300 3,700 460 2,100 No FP,S=NE,O=NE
<br /> MW-2(53) 02/16/95 10.83 37.48 -26.65 36,000 6,300 4,600 610 2,700 No FP, No S,O=NE
<br /> MW-3
<br /> W-39-MW-3 05/11/92 9.58 39.05 -29.47 65,000 13,000 3,000 1,800 8,300 No FP,No S,No O
<br /> MW-3(54) 08/24/92 9.58 40.84 -31.26 77,000 15,000 9,400 2,300 2,300 No FP,No S, No O
<br /> MW-3(54) 12/17/92 9.58 41.69 -32.11 67,000 12,000 5,500 2,100 7,200 No FP,No S,No O
<br /> MW-3(54) 03/10/93 9.58 39.54 -29.96 51,000 16,000 1,300 1,800 4,900 No FP, No S,Yes O
<br /> MW-3(54) 06/10/93 9.58 37.42 -27.84 44,000 12,000 2,100 1,800 3,200 No FP, No S,Yes O
<br /> MW-3(54) 09/02/93 9.58 38.23 -28.65 49,000 13,000 2,200 2,100 4,500 No FP, No S,Yes O
<br /> MW-3(54) 10/28/93 9.58 38.46 -28.88 46,000 14,000 1,900 2,000 4,200 No FP,No S,Yes O
<br /> MW-3(36) 03/23/93 9.58 38.02 -28.44 42,000 12,000 2,300 1,900 3,300 No FP,No S,Yes O
<br /> MW-3(36) 06/29/94 9.58 37.83 -28.25 44,000 14,000 5,300 1,800 5,500 No FP, No S,O=NE
<br /> MW-3(40) 09/26/94 9.58 39.01 -29.43 45,000 9,200 2,500 11000 2,700 No FP,No S,O=NE
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