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TABLE 3 Page 16 of 66 HISTORICAL GROUNDWATER DATA SHELL STOCRTON TERMINAL 3515 NAVY DANE,STOCRTON,CALIFORNIA MTBE MTBE Depth to GW SPH Well ID Date TPHd TPH9 B T E X 8020 8260 TBA DIPE ETBE TAME Ethanol Methanol Lead TOC Water Elea. Thickness DO (P8/L) (P$� fYS2) (P8�) (P822) (P&L) wu (v8U OOV (P82) fugal (P&L) (P82) (PF/L) (mo) VtMSL) (ft TO C) (ft MSL) (ft) (mo) 1127 12.25 -0.98 - MW-9 03/24/3994 - - - - - - - - - - - MW-9 06/27/1994 150 d ND ND NO ND ND - - - - - - - - - 11.27 12.88 -1.61 - - MW-9 09/27/1994 - - _ _ - - - _ - - - _ - - - 11.27 - - _ MW-9 12/28/1994 ND ND ND ND ND ND - - - - - - - _ = 111 -7 13.30 -2.03 - MW-9 03/13/1995 - - - - - - - - - - - - - 11.27 11.32 -0.05 - - MW-9 06/15/1995 95 260 20 1.4 ND 17 - - - - - - - - _" 11.27 11.30 -0.03 - - MW-9 09/12/1995 - - - - - - - 112 - 7 12.66 -1.39 - - - - - - _ - - MW-9 11/13/1995 150 260 18 40 5.3 46 - - - - - - 1127 13.29 -2.02 MW-9 03/20/1996 - - - - - - - _ _ _ - 11.27 9.08 2.19 - _ - - - MW-9 05/15/1996 170 ND NO ND ND ND - - - - - - - 1127 10.55 0.72- - 11.27 1217 -0.90 MW-9 08/12/1996 - - - - - - - - - - _ - _ 11.27 13.48 -221 - - MW-9 10/28/1996 220 ND ND ND ND ND - - - - - - - - - - - MW-9 03/03/1997 58 ND ND ND ND ND - - - - - - 11.27 9.90 1.37 - MW-9 05/05/1997 - - - - - - - - - - - - - - - 11.27 10.98 0.29 - - MW-9 18/ 08 1997 75 <50 <0.50 <050 <0.50 <0.50 - _ _ _ _ _ 11.27 13.12 -1.85 - - / - - - - 1127 1243 -1.16 MW-9 11/18/1997 - - - - - - - - - - - , MW-9 03/24/1998 73 <50 3.1 <0.50 <0.50 <0.50 - - - - - - - _ = 11.27 7.78 3.49 - - MW-9 06/02/1998 - - - - - - _ _ _ _ _ 11.27 9.10 2.17 - - - - - 11.27 10.89 0.38 MW-9 09/02/1998 82 c50 c0.50 <0.50 <0.50 <0.50 - - - - - - - - - - MW-9 11/09/1998 - - - - - - - - - - - - - - - 1127 1206 -0.79 - - MW-9 03/29/1999 <50 <50 <0.50 <0.50 <0.50 <0,50 - - - - - - - 11.27 11.34 -0.07 MW-9 06/15/1999 - - - - - - - - - - - - - - - 112 - 7 11.71 -0.44 - 11.27 11.89 -0.62 - MW-9 09/14/1999 - - - - - - - - - - - - - MW-9 12/20/1999 - - 11.27 13.34 -2.07 - - MW-9 02/24/2000 <50 <50.0 <0.500 <0.500 <0.500 <0.500 <250 - - - - - - - - 11.27 11.19 0.08 - - MW-9 04/27/2000 - - - - - - - - - - - - - 1117 1095 0.32 - - MW-9 08/10/2000 Well inaaessible - - - - - - 11.27 - - - - MW-9 08/25/7000 Well inaccessible - - - - - - - - 11.27 1253 -1.26 - - MW-9 08/28/2000 122 <50.0 <0.500 <0.500 <0.500 <0.500 <2.50 - - - 11.27 12.53 -1.26 - - MW-9 11/02/2000 - - - - - - - - - - - - - - MW-9 01/25/2001 91.6 <50.0 <0.500 <0.500 <0.500 <0.500 <250 - - - - _ _ _ - 11.27 12.73 -1.46 - - MW-9 05/31/2001 - - - - - - - _ _ _ 11.30 12.19 -0.89 - - / - - - - 11.30 12.81 -1.51 MW-9 08/06/2001 - - - - - - - - - - - - - MW-9 11/20/2001 - - - - - - - - - 1130 1294 -1.11 - - MW-9 02/21/2002 <50 <50 <0.50 <0.50 <0.50 <0.50 - 0.91 <5 <0.5 <p.5 <0.5 <5 G50 - 11.30 11.46 -0.16 - - MW-9 05/22/2002 - - - - - - _ _ _ _ _ 11.30 12.89 -1.59 - - - - - - 11.30 1260 -1.30 MW-9 08/19/7002 - - - - - - - - - - - - - - - 11.30 12.79 -1.49 - - MW-9 11/20/2002 - - - - - - - - - - - _ - MW-9 02/20/2003 76 <50 <0.50 <0.50 <0.50 <2.0 - 1.1 - - - - - _ - 11.30 11.67 -0.37 - - - - 11.30 1202 -0.72 MW-9 05/30/2003 - - - - - - - - - - - - - - - 11.30 12.65 -135 - - MW-9 08/13/2003 - - - - - - - - - - - - - - - 11.30 13.20 -1.90 - - MW-9 11/06/2003 - - - - - - - - - - - - - - MW-9 02/10/2004 210 <50 <0.50 <0.50 <0.50 <1.0 - 0.94 - - - - - - 1130 11.86 -0.56 MW-9 05/20/2004 - - - - - - - 11.30 11.77 -0.47 = - / - - - - 11.30 11.85 -0.55 4.3 MW-9 08/16/2004 - - - - - - - - - - - OU 241MM