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TabOl Pag0of 30 <br /> Groundwater Elevatlon 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 /> 12/17/1998 P 770 -- -712 0 42 1,000 25 2 <1 0 109 36 8 627 <br /> 3/10/1999 P 655 - -597 1 15 432 102 <0 500 1 59 173 263 2 3 <br /> BHD 1 6/22/1999 NP 813 - -755 -1 58 162 <0 5 <0 5 <0 5 <0 5 728 0 8 <br /> (cont) 9/13/1999 NP 928 - -870 -1 15 420 <0 5 <0 5 0 956 <0 5 1 410 1 2 <br /> 12/16/1999 -- Well Box Inaccessable - - -- - - - <br /> 3/23/2000 P 465 -4 07 - 559 <0 5 <0 5 1 37 0 627 <2 5 0 9 <br /> 6/21/2000 P 642 -584 -1 77 895 1 33 <0 5 <0 5 <0 5 175 01 <br /> 9/13/2000 NP 837 - 7 79 -1 95 176 4 98 0 806 1 10 1 17 1,010 2 0 <br /> 12/15/2000 P 7 93 — -735 0 44 <50 0 <0 500 <0 500 <0 500 <0 500 505 073 <br /> BHD 2 8/26/1988 073 -- - -- - - - <br /> 11/28/1988 - - <br /> 2/27/1989 -- <br /> 5/30/1989 - - - <br /> 8/22/1989 -- <0 5 <0 5 <0 5 <0 5 <br /> 12/4/1989 -- -- - <br /> 1/411990 1622 1549 <br /> 2/1/1990 - -- -- <br /> 2/15/1990 -- -- <br /> 2/22/1990 -- - - <br /> 3/8/1990 1578 -- -1505 - <0 5 <0 5 <0 5 <0 5 <br /> 4/5/1990 15 85 -- 1512 007 <br /> 4/19/1990 1592 - -1519 -007 <br /> 5/10/1990 1657 - -1584 -065 <br /> 5/24/1990 1654 -15 81 003 <br /> 6/5/1990 -- <br /> 6/18/1990 16 63 -1590 - <br /> I <br /> 7/12/1990 1703 - 1630 040 - <br /> 8/16/1990 1721 -- -1648 018 <br /> 9/17/1990 1770 -1697 0 49 <0 5 <0 5 <0 5 <0 5 <br /> 10/11/1990 1778 -1705 -008 <br /> 12/6/1990 17 63 1690 015 - <br /> 2/11/1991 1737 -1664 026 <50 <0 5 <0 5 <0 5 <0 5 <br /> 2/25/1991 1735 - -1662 002 - - - <br /> 4/23/1991 1636 -- -15 63 0 99 - - <br /> 7/16/91 1799 - -1726 -1 63 <50 <0 5 <0 5 <0 5 <0 5 j <br /> 10/8/1991 1864 -1791 -065 - - <br />