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1 r <br /> Table 3 <br /> Historical Groundwater Gradient Data <br /> ARCO Service Station#2133 <br /> 2908 Benjamin Holt Or,Stockton California <br /> Approximate Approximate <br /> flow hydraulic <br /> Date direction gradient <br /> 8189 NE 0 003 <br /> 12189 NE 0 003 <br /> 4190 NE 0 002 <br /> 6190 --(a) —(a) <br /> 10190 NE 0 003 <br /> 2191 NE 0 002 <br /> 4191 NE 0 003 <br /> 7191 —(a) --(a) <br /> 10/8/1991 —(a) —(a) <br /> 1/2211992 --(a) --(a) <br /> 4122J1992 NE 0 001 <br /> 7/29/1992 --(a) —(a) <br /> 10/29/1992 —(a) —(a) <br /> 1/27/1993 NE 0 003 <br /> 4/29/1993 NE 0 003 <br /> 8/5/1993 NE 0 002 <br /> 11/5/1993 N E 0 003 <br /> 3/22/1994 —(a) --(a) <br /> 6/27/1994 --(a) --(a) <br /> 9/29/1994 N E 0 002 <br /> 1218/1994 N E 0 002 <br /> 3/8/1995 NE 0 005 <br /> 6/1/1995 NE 0 004-0 007 <br /> 9/11/1995 --(a) —(a) <br /> 12/5/1995 NE 0 0002-0 001 <br /> 3/18/1996 N-NE 0 007 <br /> 6/18/1996 NE to E 0 004 <br /> 9/25/1996 NE to E-SE 0 004 <br /> 12/4/1996 NE to E 0 003 <br /> 3/19/1997 NE to E 0 005 <br /> W1997 NNE to NE 0 0007 to 0 004 <br /> 8/19/1997 NNE to NE 0 0004 to 0 005 <br /> 3/19/1998 Radial 0 005 <br /> 6/24/1998 Radial 0 008 to 0 011 <br /> 9/10/1998 Radial 0 006 to 0 022 <br /> 1 211 711 998 Radial 0 002 <br /> 3/10/1999 Radial WNE 0 0007 <br /> 6/22/1999 NW 00009 <br /> 9/13/1999 WNE 0 001 <br /> 12/15/1999 Variable NA <br /> (a)Gradient and flow direction could not be <br /> calculated due to influence of remediation <br /> system <br /> • <br /> 077 41 727 0051Gradient Table <br />