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i i r Table 2 Groundwater Elevation and Analytical Data(ARCO) ARCO Sennce Station#2133 2908 Benjamin Holt Dnve Stockton California Well Depth Product Groundwater Groundwater Ethyl- Xylenes Well Date Elevation to Water Thickness Elevation Elevation TPHg Benzene Toluene benzene (total) MtBE DO Number Sampled (ft,MSL) (ti TOC) (ft) (k,MSL) Change(ft) NO) NO) (u (ugA) (ugA) (ugA) (mgfL) 7129192 1793 1735 154 8 100 260 21 600 510 BHD 1 10129/92 1835 1777 -042 1 800 80 <25 110 17 (cant) 1127193 1527 1469 308 6 700 270 19 790 300 4129193 1336 1278 1 91 7 000 340 <20 610 460 815+93 14 85 1427 1 49 10 000 280 31 930 950 11!10193 1523 1465 0 38 10 000 220 11 570 420 321194 1436 1378 087 8 600 83 14 480 360 627194 1430 1372 006 9 600 110 32 490 420 929194 1546 1488 1 16 7200 170 12 460 340 — 1218194 1499 1441 047 8200 160 14 560 640 318195 1281 1223 218 6 000 84 62 300 97 611195 1729 1071 152 7100 97 <5 370 250 9111195 1321 1263 192 5 600 110 6 340 270 1215195 1370 1312 049 9200 74 <10 470 410 3/18196 938 880 432 4200 99 28 360 320 6118/96 950 892 012 5 500 82 <10 430 300 <100 925/96 1180 1122 230 4 600 75 55 280 160 <50 1214196 1150 1092 0 30 4 500 83 11 350 220 <50 3119/97 P 7 02 644 448 2 300 54 <10 190 100 01 615/97 NP 838 7 BO 1 36 3 500 39 3 76 12 170 0 2 8119/97 NP 998 940 160 440 7 9 0 94 <0 5 <0 5 360 0 2 1125/97 NP 1042 9 B4 -044 1 300 2 8 085 7 9 2 8 220 — 320/98 P 445 387 5 97 490 34 3 37 24 210 5 4 6124/98 P 592 534 147 5 500 37 <10 170 46 580 3 0 9/10198 NP 812 7 54 220 349 319 <0 500 0 542 <0 SM 567 12/17/98 P 770 712 042 1 000 252 <1 0 tag 368 627 3110!99 P 6 55 597 1 15 432 102 <0 500 159 173 263 2 3 6/22199 NP 813 755 158 162 <0 5 <05 <05 <0 5 728 0 8 9113199 NP 928 870 1 15 420 <0 5 <05 0 956 <0 5 1 410 12 12/16/99 Well box inaccessible 3123100 P 4 65 -407 659 <0 5 <05 137 0 627 <2 5 09 6/21/00 P 642 5 84 1 77 895 1 33 <05 <0 5 <05 175 0 1 9/13100 NP 837 779 195 176 498 0 806 110 1 17 1 010 2 0 12/15/00 P 7 93 — 735 0 44 <500 <0 500 <0 500 <0 500 <0 500 505 0 73 a/ 01 WBII inaccessible 5110101P 5 83 525 — 101 0 788 <0 500 133 1 25 639 14 822101 P 8 63 805 280 <500 <50 <50 <50 <50 850 1215101 P 808 7 50 055 <500 <50 <50 <5 0 <50 470 184 3112102 P 605 547 203 <500 <5 0 <50 <5 0 <50 430 093 616102 P 703 645 098 95 <0 50 <0 50 <0 50 <0 50 170 022 924102 P 892 8 34 1 89 500 37 089 64 090 290 029 12/17/02 P 7 86 728 106 72 <0 50 <0 50 <0 50 <0 50 78 -- 3118/03 P 708650— 0 78 69 <0 50 <0 50 <0 50 <0 50 97 102 6/17/03 P 7 33 75 0 2 Ogg <7 <10 51 0 <1 0 250 060 8HD-2 826!68 073 — -- I Projects/ARCO21331fable5/gwlables2133)ds 23029