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3 <br /> Historical Groundwater Gradient Data <br /> Chevron Service Station#9.4275 <br /> 2905 Benjamin Halt Drive <br /> and <br /> ARCD Service Station 112133 <br /> 2908 Benjamin Holt Drive <br /> Stockton,California <br /> Approximate Approximate <br /> Date flow hydraulic <br /> Sampled direction gradient <br /> 812212001 N to NE 0.002-0.004 <br /> 1215/2001 NE to NW 0.003 <br /> 3/11/2002 NE to NW 0.002-0.004 <br /> 6/612002 NE to NW 0.007-0.004 <br /> 972412002 N to NE 0007-0.003 <br /> 12/1772002 N 0.009 <br /> 3/1812003 N 0.002 <br /> 6/1772003 N OM2 <br /> 972412003 S 0.003 <br /> 1211812003 N 0,003 <br /> 3/17/2003 N 0.003 <br /> 6121-6129104 N-NE 0.06-0.006 <br /> 912112004 N-NE 0.001-0.004 <br /> Notes: <br /> a=flow direction and gradient could not be <br /> calculated due to influence of remediation system <br /> —=not applicable <br /> I:7Projects/ARCO/2133/Reports7Tables7gwtables2133.xis 2 of 2 <br />