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. Table 2 <br /> Historical Groundwater Gradient Data <br /> ARCO Service Station#2093 <br /> 3425 Tracy Blvd Tracy California <br /> Approximate Approximate <br /> flow hydraulic <br /> Date direction gradient <br /> 6/23/1988 N 0 002 <br /> 9/29/1988 N 0 002 <br /> 2/22/1989 NE 0 002 <br /> 6/21/1989 NE 0 002 <br /> 9/18/1989 N 0 002 <br /> 12/27/1989 E 0 002 <br /> 4/18/1990 NE 0 001 <br /> 1/10/1991 NE 0 002 <br /> 4/10/1991 NE 0 003 <br /> 7/10/1991 N E 0 002 <br /> 9/24/1991 N 0 002 <br /> 1/23/1992 N 0 002 <br /> 4/20/1992 NE 0003 <br /> 7/8/1992 N-NE 0002 <br /> 10/7/1992 NNE 0 002 <br /> 1/18/1993 ESE(a) 0 004 <br /> 4/14/1993 N 0 003 <br /> 8/30/1993 N 0 003 <br /> 10/27/1993 N-NE 0 003 <br /> • 2/17/1994 NE 0 002 <br /> 5/20/1994 NE 0 001 <br /> 10/7/1994 NE 0 003 <br /> 1 211 6/1 994 NE 0 002 <br /> 2/28/1995 NE 0 002 <br /> 4/26/1995 NE 0 003 <br /> 7/27/1995 N and NE 0 006 <br /> 10/26/1995 NE 0 004 <br /> 2/12/1996 E 0 002 <br /> 4/18/1996 NE 0 004 <br /> 7/18/1996 NE 0 002 <br /> 11/15/1996 NE 0 002 <br /> 3/14/1997 E 0 003 <br /> 6/4/1997 N E 0 002 <br /> 8/11/1997 N E 0 002 <br /> 11117/1997 N E 0 002 <br /> 3130/1998 NE 00026 <br /> 6/25/1998 NW 0 001 <br /> 9/11/1998 NE 0 003 <br /> 1 211 5/1 998 NE 0 003 <br /> 3/17/1999 N E 0 006 <br /> 5/14/1999 E-NE 0 009 <br /> 9/16/1999 NE 0 004 <br /> (a)incorrectly reported as WNW in <br /> 1st quarter 1993 report (April 26 1993) <br /> 077 41 728 005/Gradient Table <br />