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• a � <br /> Table 1 <br /> Groundwater Elevation and Analytical Data <br /> ARCO Service Station #2133 <br /> 2908 Benjamin Holt 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 /> Dumber Sampled (ft,MSL) (ft,TOc) ft ft,MSL) Change(ft) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (mg/L) <br /> Ell 6/19/1990 1920 - -1578 -073 - 135 166 20 111 <br /> (cont) 7/12/1990 1930 - -1588 -010 - - <br /> 8/16/1990 1965 -1623 -035 - <br /> 9/17/1990 1994 - -1652 -029 - - -- _- - <br /> 9/19/1990 1994 - -1652 000 680 90 8 2 14 110 <br /> 10/11/1990 2003 -- -1661 -009 - -- - -- - <br /> 12/6/1990 1897 -- -1555 106 - -- - _ _ <br /> 2/12/1991 1953 -1611 -056 1,400 120 13 21 300 <br /> 2/25//1991 1940 _- -1598 013 - -- - -- - <br /> 4/23/1991 1856 -- -1514 084 400 22 <0 5 1 7 11 <br /> 7/16/91 2219 - -1877 -363 4,100 420 35 40 360 <br /> 10/8/1991 21 73 - -1831 046 5,700 410 19 62 380 <br /> 1/22/1992 2000 -1658 1 73 6,200 220 64 <14 120 <br /> 4/22/1992 1908 - -1566 092 14,000 570 57 150 510 <br /> 7/29/1992 2064 -- -1722 156 21,000 790 36 280 830 <br /> 10/29/1992 2100 -1758 -036 6,600 390 <20 68 150 <br /> 1/27/1993 1768 -1426 332 51,000 830 180 390 950 <br /> 4/29/1993 1591 -- -1249 177 28,000 530 <100 156 730 <br /> 8/5/1993 1753 -1411 -162 54,000 540 <130 200 550 <br /> 11/10/1993 1756 - -1414 -003 30,000 290 120 95 280 <br /> 3/21/1994 1720 - -1378 036 4,900 220 16 39 170 <br /> 6/27/1994 1704 -- -1362 016 3,400 210 7 9 22 120 <br /> 9/29/1994 1812 -- -1470 -108 2,200 180 13 24 65 <br /> 12/8/1994 1773 -- -1431 039 1,800 150 7 9 25 28 <br /> 3/8/1995 1525 - -11 83 248 8,600 85 <17 35 32 <br /> 6/1/1995 1375 -- -1033 1 50 8,900 180 <17 50 71 <br /> 9/11/1995 1596 -- -1254 -221 7,500 38 <20 32 49 <br /> 12/5/1995 1634 -1292 -038 1,100 13 <8 6 5 <br /> 3/18/1996 1100 -758 534 2,000 24 <0 5 43 65 - <br /> 6/18/1996 1205 -- -863 -105 620 11 9 32 32 <5 <br /> 9/25/1996 1445 -1103 -240 400 4 <05 1 5 33 <5 <br /> 12/4/1996 1393 - -1051 052 280 35 <0 5 1 4 2 <5 <br /> 3/1911997 NP 950 - -608 443 <50 <0 5 <05 <0 5 <0 5 - 1 1 <br /> 6/5/1997 NP 11 17 - -775 -167 <50 <0 5 <0 5 <0 5 <0 5 <5 1 5 <br /> Prolects(ARCO/2133/Reports/Tables/gwtables2133 As 21 <br />