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• • Pagel6 of 28 Table 1 Groundwater Elevation and Analytical Data ARCO Service Station#2133 2908 Benjamin Holt Or,Stockton,California Well Depth Product Groundwater Groundwater Total Date Elevation to Water thickness, Elevation Elevation change TPH-G Benzene Toluene Ethylbenzene Xylenes MTBE Sampled (feet,MSL) (feet,TOC) In feet (feet,MSL) (feet) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) E-11 211190 18 19 -- -1477 020 - - (cont) 2115190 1816 - -1474 003 2/22190 1893 -- -1551 -0 77 - - - - - 3/8/90 1791 - -1449 102 - 801 31 3 756 242 -- 415190 1817 - .1475 -0 26 -- -- - ` - -- 4119190 1825 -- -1483 -008 - - - -- -' 5/10/90 1855 - -1513 -0 30 - - - - 5124190 1850 - -1508 005 - - 6/5190 1847 - -1505 003 -- -- - - - -- 6119/90 19 20 -- -1578 -073 -- 135 166 20 7/12190 1930 - -1588 -010 -- - -- -- - 8/16190 1965 - -16 23 -035 - - - - - .- 9117/90 1994 - -1652 -029 - - - - 9119190 1994 - -1652 0 DO 680 90 8 2 14 110 -- 10/11/90 2003 - -1661 -0 D9 -- - -- -- - -" 12090 1897 - -1555 106 - -- -- -- -- 2112/91 1953 - -1611 -0 56 1,400 120 13 21 300 -- Z-eA1 1940 - -1598 013 - - -- - _ 4123/91 1856 - -1514 0 84 400 22 <0 5 17 11 - 7/16191 2219 -- -18 77 -0 63 4,100 420 35 40 360 - 10/8191 2173 -- -1831 0 46 5,700 410 19 62 380 - 1122/92 2000 - -1658 173 6,200 220 64 <14 120 - 4r2192 1908 - -1566 092 14,000 570 57 150 510 - 7129/92 20 64 -- -17 22 -156 21,000 790 36 280 830 - 10/29192 2100 - -1758 -0 36 6,600 390 <20 68 150 -- 1127193 1768 - -1426 332 51,000 B30 180 390 950 -- 4/29193 1591 - -1249 177 28,000 530 <100 156 730 - 815/93 1753 - -1411 -162 54,000 540 <130 200 550 - 11/10193 1756 -- -1414 -003 30 000 290 120 95 280 -- 3121194 1720 - -1378 036 4,900 220 16 39 170 - 6127194 1704 - -1362 016 3 400 210 7 9 22 120 - 9129194 1812 - -1470 -1 08 2,200 180 13 24 65 - 1218194 17 73 - -1431 039 1.13M 150 79 25 28 - 318195 1525 -- -1183 2 48 8,600 85 <17 35 32 - 7G600-019-01/GW Tables