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� v <br /> Tab Page 5 of 30 <br /> Groundwater Elevation and Analytical Data <br /> ARCO Service Station#2133 <br /> 2908 Benjamin Holt Dr,Stockton,CA <br /> Well Depth Product Groundwater Groundwater xylenes <br /> Well Date Elevation to Water Thickness Elevation Elevation TPHg Benzene Toluene Ethylbenzene (total) MtBE DO <br /> Number Sampled (ft,MSL) ft,TOC (ft ft,MSL) Change(ft) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (mg/L) <br /> 12/6/90 1882 -- -1649 016 -- -- - - -- <br /> 2/12/91 1848 -- -1615 0 34 3,200 750 9 73 270 <br /> 2/25/91 1843 -- -1610 005 -- -- -- -- <br /> 4123191 1762 -- -1529 0 81 - -- - <br /> 7/16/91 2030 — -1797 -268 -- <br /> 1018191 20 90 -- -1857 -060 -- <br /> 1/22/92 <br /> -1/22/92 1901 -- -1668 1 89 8,500 1,100 140 10 220 <br /> 4122192 1805 -- -1572 096 6,300 730 12 110 200 <br /> 7/29/92 1963 -1730 -158 7,700 1,000 14 130 310 <br /> 10/29/92 1999 -- .1766 -036 5,600 1,300 16 130 180 <br /> 1/27/93 1672 -- -1439 327 10,000 470 26 130 270 <br /> 4/29/93 1494 -1261 178 14,000 1,300 22 280 520 <br /> 8/5193 1663 -- -1430 -169 9,400 900 <20 160 240 <br /> 11/10/93 1692 -- -1459 -029 4,400 290 <20 67 130 <br /> 3/21/94 1639 -- -1406 053 5,400 340 24 110 220 <br /> 6/27/94 1614 - -1381 025 7,800 790 11 170 470 <br /> 9/29/94 1706 -- -1473 -092 1,600 130 <0 5 33 41 -- <br /> 1218/94 1665 -- -1432 0 41 5,200 940 88 170 380 <br /> 3/8/95 1419 -- -1186 246 7,900 490 5 6 130 190 <br /> 6/1/95 1274 -- -1041 1 45 15,000 1,000 10 360 380 <br /> 9/11/95 1496 -- -12 63 -222 10,000 1,000 <10 350 320 <br /> 12/5/95 1523 -- -1290 -027 -- -- __ -- <br /> 3/18/96 1010 -- -7 77 513 4,700 530 35 250 350 <br /> 6/18/96 1103 -- -870 -093 -- -- -- - -- <br /> 9/25/96 1347 -- -1114 -244 7,600 890 <10 380 190 <5 <br /> 12/4/96 1294 -- -1061 053 -- -- -- .. _ <br /> 3/19/97 NP 7 43 -- -510 5 51 1,600 120 8 4 38 <5 0 2 <br /> 6/5/97 1008 -- -7 75 -265 -- -. -- __ __ _ 0 1 <br /> 8/19/97 NP 1167 -- -924 -149 1,800 83 7 8 6 3 7 6 110 0 1 <br /> 11/25/97 P 1127 -- -894 030 -- -- -- _- .. _- - <br /> 3/19/98 NP 5 47 -- -314 5 80 110 3 6 <0 50 <0 50 <0 50 14 36 <br /> E-4 6/24/98 7 53 -- -520 -206 -- -- _ .. <br /> (cont) 9/10/98 NP 920 -- -687 -167 97 2 3 35 <0 50 <0 50 <0 50 815 <br /> 12/17/98 929 -- -696 -009 -- -- _ - _ <br /> 3110/99 NP 707 -- -474 2 22 <50 <0 50 <0 50 <0 50 <0 50 <5 0 3 0 <br /> 6/22199 902 -- -669 -195 -- -- -- 0 6 <br /> 9/13/99 NP 1077 -- -844 -175 107 <0 50 <0 50 0 738 <0 50 853 2 3 <br /> 12/15/99 1065 -- -832 0 12 -- -- -- - 1 1 <br /> 3/23100 NP 597 -• -364 468 <50 <0 50 <0 50 <0 50 <0 50 <2 50 1 7 <br />