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TABLES Page 1 of 1 <br /> VERTICAL GROUNDWATER GRADIENT DATA <br /> SHELL STOCKTON TERMINAL <br /> 3515 NAVY DRIVE,STOCKTON,CALIFORNIA <br /> Top of Screen Top of Screen Calculated <br /> Casing Midpoint Groundwater Casing Midpoint Groundwater Vertical <br /> Gauging Deeper Elevation Elevation Elevation Shallow Elevation Elevation Elevation Gradient <br /> Date Well (feet msl) (feet msl) (feet msl) Well (feet msl) (feet msl) (feet msl) (feet/foot)* <br /> 2/17/2005 DW-2 3.22 -54.08 -1.62 MW-26 3.61 -13.44 -0.49 -0.028 <br /> 5/12/2005 DW-2 3.22 -54.08 -2.58 MW-26 3.61 -13.44 -2.33 -0.006 <br /> 8/30/2005 DW-2 3.22 -54.08 -3.83 MW-26 3.61 -13.44 -3.84 0.000 <br /> 11/30/2005 DW-2 3.21 -54.09 -4.20 MW-26 3.58 -13.47 -4.26 0.001 <br /> 2/2/2006 DW-2 3.21 -54.09 -1.89 MW-26 3.58 -13.47 -1.56 -0.008 <br /> 5/30/2006 DW-2 3.21 -54.09 -2.18 MW-26 3.58 -13.47 -1.88 -0.007 <br /> 8/31/2006 DW-2 3.21 -54.09 -3.70 MW-26 3.58 -13.47 -3.56 -0.003 <br /> 11/16/2006 DW-2 3.21 -54.09 -4.70 MW-26 3.58 -13.47 -3.60 -0.027 <br /> 2/26/2007 DW-2 3.21 -54.09 -2.99 MW-26 3.58 -13.47 -2.83 -0.004 <br /> 5/29/2007 DW-2 3.21 -54.09 -3.60 MW-26 3.58 -13.47 -3.47 -0.003 <br /> 8/27/2007 DW-2 3.21 -54.09 -3.94 MW-26 3.58 -13.47 -3.57 -0.009 <br /> 11/29/2007 DW-2 3.21 -54.09 -3.83 MW-26 3.58 -13.47 -3.89 0.001 <br /> 2/22/2008 DW-2 3.21 -54.09 -2.24 MW-26 3.58 -13.47 -1.82 -0.010 <br /> 5/21/2008 DW-2 3.21 -54.09 -3.94 MW-26 3.58 -13.47 -3.72 -0.005 <br /> 8/28/2008 DW-2 3.21 -54.09 -3.95 MW-26 3.58 -13.47 -3.88 -0.002 <br /> 11/6/2008 DW-2 3.21 -54.09 -3.54 MW-26 3.58 -13.47 -3.42 -0.003 <br /> 2/10/2009 DW-2 3.21 -54.09 NA MW-26 3.58 -13.47 NA NA <br /> 5/7/2009 DW-2 3.21 -54.09 -3.09 MW-26 3.58 -13.47 -2.87 -0.005 <br /> 8/31/2009 DW-2 3.21 -54.09 -3.64 MW-26 3.58 -13.47 -3.77 0.003 <br /> 11/12/2009 DW-2 3.21 -54.09 -5.38 MW-26 3.58 -13.47 -3.56 -0.045 <br /> 2/3/2010 DW-2 3.21 -54.09 -3.49 MW-26 3.58 -13.47 -2.22 -0.031 <br /> 5/6/2010 DW-2 3.21 -54.09 -7.39 MW-26 3.58 -13.47 -2.12 -0.130 <br /> 8/30/2010 DW-2 3.21 -54.09 4.39 MW-26 3.58 -13.47 -3.77 -0.015 <br /> 12/3/2010 DW-2 3.21 -54.09 -3.54 MW-26 3.58 -13.47 -3.23 -0.008 <br /> Notes: <br /> Calculated vertical gradient consists of the difference between groundwater elevations divided by the difference between screen <br /> mid-point elevations. <br /> *Negative sign denotes downward vertical gradient <br /> msl=Relative to mean sea level <br /> CRA 241n9(u) <br />