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Table 1 Page 17 of 30 <br /> Groundwater Elevation and Analytical Data <br /> ARCO Service Station#2133 <br /> 2908 Benjamin Holt Dr,Stockton,California <br /> Well Depth Product Groundwater Groundwater Total <br /> Date Elevation to Water thickness, Elevation Elevation change TPH-G Benzene Toluene Ethylbenzene Xylenes MTBE DO <br /> Sampled (feet,MSL) (feet,TOC) in feet (feet,MSL) (feet) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) mg/l <br /> 2!1211991 1813 -- -1716 -- 1,300 110 15 17 65 <br /> E 8 2/25/1991 1805 -- -1708 008 - - - - <br /> (cont) 4/23/1991 1639 -1542 1 66 310 9 3 <0 5 <0 5 0 87 <br /> 7116191 1869 -1792 250 200 18 <05 07 25 <br /> i 0/8/1991 1946 - -1849 0 57 <50 7 8 <0 5 <0 5 0 61 <br /> 1/22/1992 1769 -- -1672 1 77 250 2 8 0 6 21 <0 5 <br /> 4/22/1992 1671 -- -1574 0 98 1,200 93 <2 5 37 5 3 <br /> 7/29/1992 1821 -- -1724 -1 50 690 81 1 3 5 7 6 <br /> 10/29/1992 1862 -- -1765 -041 620 87 <0 7 71 6 7 <br /> 1/27/1993 1542 -1445 320 960 31 <1 1 9 1 8 <br /> 4/29/1993 1356 -- 1259 1 86 360 20 <4 2 2 2 1 7 <br /> 8/5/1993 1528 -- -1431 172 320 12 <0 5 2 3 1 6 <br /> 11/10/1993 15 62 -1465 0 34 310 12 2 4 1 7 1 4 <br /> 3/21/1994 15 00 1403 062 220 0 9 1 1 1 0 1 3 <br /> 6/27/1994 1479 -1382 0 21 400 24 24 4 6 2 0 <br /> 9/29/1994 1576 1479 097 670 46 <0 5 8 9 <0 5 <br /> 12/8/1994 1537 -- 1440 0 39 190 3 5 1 1 1 24 <br /> 3/8/1995 1293 -- 1196 244 200 13 <0 5 2 9 <0 5 <br /> 6/1/1995 1146 1049 1 47 650 26 1 8 5 1 5 <br /> 9/11/1995 1366 -1269 220 370 74 <0 5 21 <0 5 <br /> 12/5/1995 1400 -- -1303 0 34 150 2 8 <0 5 1 1 <0 5 <br /> 3/18/1996 905 -808 4 95 2,000 19 <0 5 9 3 13 <br /> 6/18/1996 9 80 -8 83 -075 2,300 41 47 18 4 9 <5 <br /> 9/25/1996 1228 - 11 31 -248 2,000 31 <1 14 1 4 <10 <br /> 12/4/1996 11 73 - -1076 055 1,800 29 <5 15 <5 <50 <br /> 3/19/1997 NP 714 -617 459 840 19 1 1 9 4 0 82 01 <br /> 6/5/1997 NP 8 82 785 1 68 900 13 1 4 4 7 1 3 <5 0 2 <br /> 8/19/1997 NP 1027 930 1 45 1,000 13 4 2 4 0 84 <5 0 2 <br /> 11/25/1997 N P 1047 -950 -020 140 <0 5 <0 5 <0 5 <0 5 <5 <br /> 3/19/1998 NP 419 -322 628 <50 <0 5 <0 5 <0 5 <0 5 <5 2 4 <br /> 6/24/1998 NP 622 -525 -203 <50 <0 5 <0 5 <0 5 <0 5 5 7 1 5 <br /> 9/10/1998 NP 804 - -707 -1 82 548 <0 5 <0 5 <0 5 <0 5 <5 <br /> 12/17/199B IVP 804 - -707 0 00 <50 <0 5 <0 5 <0 5 <0 5 205 <br /> 3/10/1999 NP 583 -- -486 221 <50 <0 5 <0 5 <0 5 <0 5 <5 <br /> 612 211 99 9 NP 776 - -679 -193 <50 0 519 <0 5 <0 5 <0 5 <5 27 <br /> 9/13/1999 NP 9 51 -854 -175 <50 <0 5 <0 5 <0 5 <0 5 <5 2 1 <br /> 12/16/1999 NP 940 -- 843 Oil <50 <0 5 <0 5 <0 5 <0 5 307 1 8 <br /> 3/23/2000 NP 473 - 376 467 <50 <0 5 <0 5 <0 5 <0 5 15 4 1 2 <br />