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Tab* Page*540 <br /> Groundwater Elevation and Analytical Data <br /> ARCO Service Station 42133 <br /> 2908 Benjamin Halt 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/f <br /> 7/29/1992 1960 -- -1715 1 29 <br /> E 5 10/29/1992 Dry -- -- - - - <br /> (cont) 1/27/1993 1690 -1445 -- 26,000 4,000 110 470 800 <br /> 4/29/1993 1508 -- -1263 1 82 41,000 6,300 110 920 2,200 <br /> 8/5/1993 1680 -- -1435 -1 72 26,000 4,700 <50 560 560 <br /> 11/10/1993 1719 -1474 -0 39 19,000 2,500 <50 380 690 <br /> 3/21/1994 1660 -- -1415 0 59 13,000 1,700 40 300 650 <br /> 6/27/1994 1627 -1382 0 33 9,400 1,800 17 260 520 <br /> 9/29/1994 1723 - 1478 0 96 7,900 1,200 <20 200 330 <br /> 12/8/1994 1683 -- 1438 0 40 6,800 1,300 30 220 410 <br /> 3/8/1995 1434 .1189 2 49 39,000 3 000 <50 460 1 400 <br /> 6/1/1995 1275 -1030 1 59 2,300 69 <2 5 11 53 <br /> 9/11/1995 1475 - 1230 200 1,200 <3 4 6 14 <br /> 12/5/1995 1541 -- -1296 0 66 -- - <br /> 3/18/1996 9 60 -- -715 5 81 150 0 59 <0 5 <0 5 065 <br /> 6/18/1996 11 20 -875 -1 60 -- - - <br /> 9/25/1996 1312 -1067 -1 92 <50 <0 5 <0 5 <0 5 <0 5 <5 <br /> 12/4/1996 1265 -- 1020 0 47 - -- - <br /> 3/19/1997 NP 844 - -5 99 4 21 <50 <0 5 <0 5 <0 5 <0 5 7 8 <br /> 6/5/1997 P 1020 - -7 75 176 - 9 7 <br /> 8/19/1997 NP 11 72 -- -927 152 <50 <0 5 <0 5 <0 5 <0 5 <5 73 <br /> 11/2511997 P 11 93 - -948 021 -- - <br /> 3/20/1998 NP 5 61 - -316 6 32 1,200 5 7 2 6 1 4 1 3 <5 140 <br /> 6/24/1998 766 -521 205 - - <br /> 9/10/1998 NP 940 - -695 174 <50 <0 5 <0 5 <0 5 <0 5 <5 <br /> 12/17/1998 945 700 -005 - - - <br /> 3/10/1999 NP 727 4 82 2 18 <50 <05 <0 5 <0 5 <0 5 <5 41 <br /> 6/22/1999 - 922 677 -1 95 - 3 1 <br /> 9/13/1999 NP 1093 848 -1 71 <50 <0 5 <0 5 <0 5 <0 5 <5 5 6 <br /> 12/15/1999 - 1082 8 37 0 11 - 95 <br /> 3/23/2000 NP 612 3 67 4 70 <50 <0 5 <0 5 <0 5 <0 5 <2 50 4 7 <br /> 6/21/2000 - 837 5 92 2 25 - -- - - 048 <br /> 9/13/2000 NP 1017 -- 772 1 80 <50 <0 5 <0 5 <0 5 <0 5 <2 50 309 <br /> 12/15/2000 -- 962 — -717 055 -- -- - - 1 10 <br /> E 6 8/26/1988 301 -- -- - - - <br /> 11/28/1988 -- - -- <br />