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. Pa*f 35 Table 1 Groundwater Elevation and Analytical Data ARCO Service Station#2133 2908 Benjamin Holt Dr,Stockton,CA Well Depth Product Groundwater Groundwater Xylenes Well Date Elevation to Water Thickness Elevation Elevation TPHg Benzene Toluene Ethylbenzene (total) MtBE DO Number Sampled (ft,MSL) (ft,TOC) (ft) (ft,MSL) Change(ft) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (mg/L) E-6 2/15190 1778 -1477 004 -- -- _ (cont) 2122190 1858 -- -1557 -080 - -- -- -- -- .. -- 3/8/90 1765 -1464 093 - 3,600 740 340 980 4/5/90 1767 -- -1466 -002 - -- -- - -- _ 4/19190 1773 -- -1472 -006 5110190 1811 - -1510 -038 -- -- -- 5/24/90 1813 - -1512 -002 -- - _ 6/5/90 1812 - -1511 0 01 6119/90 1880 -1579 -068 7112190 1872 -1571 008 8116/90 dry -- -- -- - -- -- 9/17/90 dry -- 10/11/90 dry - -- - -- -- - -- -- 12/6/90 dry -- -- -- -- -- -- - 2/12191 1886 - -1585 -- 2/25/91 2/25/91 18 84 - -15 83 002 -- -- -- -- - - -- 4/23/91 1814 -- -1513 070 7115191 dry - -- - 10/8/91 dry - - - - - -- 1/22192 dry - -- 4122/92 1855 -1554 - -- - 7/29/92 dry - -- - - - 10/29/92 dry -- -- .. .. __ __ - 1127/93 1728 -- -1427 - 26,000 3,300 310 1,000 1,600 - 4/29/93 15 47 -1246 181 33,000 3,200 270 1,400 2,300 815/93 1711 -- -1410 -164 16,000 2,500 57 1,100 1,000 11/10/93 1734 - -1433 -023 27,000 2,500 73 1,200 1,800 -- 3/21/94 16 84 -- -1383 050 21,000 2,000 150 1,200 2,100 - -- 6/27/94 1658 -1357 026 17,000 2,000 47 1,300 1,600 9129/94 -- -- -- -- 29,400 3,100 <100 1,800 2,900 -- 12/8/94 1588 -1287 -- 18,000 2,100 240 1,800 2,600 - - 3/8/95 2 82 1334 -1033 254 47,000 880 170 870 2,900 -- 6/1195 -. ._ - 9/11/95 1410 -- -1109 -- 15,000 3220 X20 400 130 - 12/5/95 1 41 1455 -1314 -205 -- -- -- -- __ 3116196 938 - -797 517 1,200 14 <5 24 27 , Projects/ARCO/2133/Reports/Tables/gwtables2133 As