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. 0 a 101`3 Table 2 Groundwater Elevation and Analytical Data ARCO Service Station#595 6100 N Highway 99,Stockton,CA Well Depth Groundwater Groundwater Ethyl- Xylenes MtBE MtBE Well Date Elevation to Water Elevation Elevation TPHg Benzene Toluene benzene (total) (EPA 8020) (EPA 8260) DO Number Sampled (ft,MSL) (ft,TOC) (ft,MSL) Change(ft) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (mglL) MW-1 6116100 NP 3555 5765 -2210 - 1,340 734 669 945 164 <125 <2 0 -- 9/19/00 NP 6068 -25 13 -303 2,990 189 182 676 115 <50 0 242 03 11/2100 P 6074 -2519 -006 3,000 258 46 7 105 196 <25 0 25 2 9 315/01 P 6090 -2535 -016 4,250 479 68 6 208 386 203 128 5 2 518/01 P 6140 2585 -050 2,130 179 109 590 914 771 459 043 811101 P 6317 2762 -177 120 25 <0 50 <0 50 <0 50 2 8 12 153 10/23/01 P 6453 -2898 -136 770* <5 0 <5 0 <5 0 <50 39 37 030 2/1/02 P 6394 -2839 059 520" 15 1 1 14 <0 50 29 31 053 4/11/02 P 6385 -2830 009 2,100* 94 20 45 68 90 1 9 0 55 7116,17/02 P 6512 -2957 -127 1,000 42 10 18 32 36 26 2 4 MW-2 6116/00 NP 32 94 5572 -2278 -- 655 28 0 882 258 194 179 116 -- 9/19/00 NP 5843 -2549 -271 495 364 <0 50 <0 50 1 45 760 936 06 1112/00 P 5942 -2648 -0 99 428 126 <0 50 177 204 80 8 71 2 8 315101 P 5839 -2545 103 476 287 108 837 277 740 601 49 5/8101 P 5905 -2611 -066 315 135 0 638 2 85 148 778 998 046 811101 P 6098 -2804 -193 630 59 61 11 16 60 76 136 10/23/01 P 62 34 -2940 136 590' 57 2 8 7 0 4 7 88 65 0 26 2/1/02 P 6233 -2939 0 01 280 14 1 7 2 6 3 9 79 66 030 4/11/02 P 61 36 -2842 0 97 170' 1 5 <0 50 <0 50 <0 50 68 64 048 7116,17102 P 6280 -29 86 -144 120* 23 18 <0 50 16 84 69 23 MW-3 6/16100 NP 3361 5635 -2274 -- 226 289 <0 50 2 84 102 929 869 -- 9/19/00 NP 5901 -2540 -266 217 0 582 <0 50 <0 50 <0 50 <2 5 <2 0 0 5 1112100 P 5911 -25 50 -010 162 <0 50 <0 50 <0 50 <0 50 120 11 13 3/5/01 P 5902 -2541 009 178 <0 500 <0 500 <0 500 0 732 443 735 5 6 5/8/01 P 5975 -2614 -073 166 0 515 <0 500 <0 500 0 711 2 96 3 93 060 8/1/01 P 61 56 -2795 -181 220 073 <0 50 <0 50 <0 50 <2 5 <2 0 1 05 10/23/01 P 6291 -2930 -135 130* <0 50 <0 50 <0 50 <0 50 15 11 1 15 211102 P 6223 -28 62 0 68 92* 1 1 <0 50 1 1 0 51 6 6 43 074 4/11/02 P 6202 -2841 0 21 120 0 52 <0 50 <0 50 <0 50 9 8 4 8 043 7116,17/02 P 6343 -29 82 -141 110* 0 53 3 9 0 86 5 0 13 94 -- MW-4 6/16/00 NP 3377 5656 -2279 -- 8,910 2,310 <0 50 839 1,520 3,680 3,200 -- 9/19100 NP 5924 -25 47 -2 68 18,900 2,240 <20 0 693 2,230 2,240 2,510 0 4 1112100 P 5859 -2482 065 9,230 1,740 <50 0 154 951 1,990 2,200 1 7 ProjectslARCO15951ReportslTableslgwtables595