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Table 1 <br /> Groundwater Elevation and Analytical Data <br /> ARCO Service Station#2133 <br /> 2908 Benjamin Halt Drive <br /> Stockton, California <br /> Well Depth Product Groundwater Groundwater Ethyl- Xylenes <br /> Well Date Elevation to Water Thickness Elevation Elevation TPHg Benzene Toluene benzene (total) MtBE DO <br /> Number Sampled (ft,MSL) ft,TOC) ft) fit,MSL) Change(ft) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (mg/L) <br /> E-5 6/19/1990 1849 -- -1604 -092 2,150 30 200 780 <br /> (cont) 7/12/1990 1837 -1592 012 - <br /> 8/16/1990 1865 -- -1620 -028 <br /> 9/17/1990 1901 -- -1656 -036 - -- _ _ <br /> 9/18/1990 1901 -1656 000 30,000 7,400 210 860 8,300 <br /> 10/11/1990 1911 - -1666 -010 - - - <br /> 12/6/1990 1895 -- -1650 016 -- - - <br /> 2/14/1991 1862 -- -1617 033 18,000 6,300 120 560 4 300 <br /> 2/25/1991 1859 - -1614 003 -- - .- __ -- <br /> 4/23/1991 1787 -- -1542 072 10,000 8,400 <0 50 270 680 <br /> 7/15/1991 dry .. __ _ -- <br /> 10/8/1991 dry .. -- _ <br /> 1/22/1992 1923 -- -1678 - - _ <br /> 4/22/1992 1831 -- -1586 092 28,000 4,300 130 560 1,700 <br /> 7/29/1992 1960 - -1715 -129 -- - - <br /> 10/29/1992 dry __ __ - -- _ - <br /> 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 2200 <br /> 8/5/1993 1680 - -1435 -1 72 26,000 4,700 <50 560 560 <br /> 11/10/1993 1719 -- -1474 -039 19,000 2,500 <50 380 690 <br /> 3/21/1994 1660 - -1415 059 13,000 1,700 40 300 650 <br /> 6/27/1994 1627 - -1382 033 9,400 1,800 17 260 520 <br /> 9/29/1994 1723 - -1478 -096 7,900 1,200 <20 200 330 <br /> 12/8/1994 1683 -1438 040 6,800 1,300 30 220 410 <br /> 3/8/1995 1434 11 89 249 39,000 3,000 <50 460 1 400 <br /> 6/1/1995 1275 -- -1030 1 59 2,300 69 <25 11 53 <br /> 9/11/1995 1475 -- -1230 -200 1,200 <3 4 6 14 <br /> 12/5/1995 1541 - -1296 -066 -- -- - -- <br /> 3/18/1996 960 - -715 581 150 059 <0 5 <0 5 065 <br /> 6/18/1996 1120 -- .875 -160 - -_ -- _ <br /> 9/25/1996 1312 -- -1067 -1 92 <50 <0 5 <0 5 <0 5 <0 5 <5 <br /> 12/4/1996 1265 -1020 047 - -- -- <br /> 3/19/1997 <br /> _3/1911997 NP 844 -599 421 <50 <0 5 <0 5 <0 5 <0 5 7 8 <br /> 6/5/1997 P 1020 -775 1 76 -- -- - 97 <br /> Pro)ects/A RCO/21 33/Reports/Tables/gwtables2133 As 8 <br />