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TABLE 4 <br />HISTORICAL GROUNDWATER ELEVATION DATA <br />Waterloo Food Fuel <br />3032 East Waterloo Road <br />Stockton, California <br />Monitoring <br />Well <br />Date Reference <br />Elevation* <br />(feet) <br />Depth to <br />Groundwater <br />(feet) <br />Groundwater <br />Elevation <br />(feet) <br />Mid-Screened Wells <br />MW-5B 10/31/2001 24.6 60.30 -35.70 <br />3/5/2002 24.65 49.35 -24.75 <br />9/17/2002 61.46 -36.86 <br />5/27/2003 57.60 -33.00 <br />9/29/2003 62.15 -37.55 <br />3/23/2004 56.57 -31.97 <br />6/8/2004 60.08 -35.48 <br />9/16/2004 65.45 -40.85 <br />12/14/2004 63.71 -39.11 <br />3/12/2005 54.61 -30.01 <br />6/5/2005 54.36 -29.76 <br />11/10/2005 55.71 -31.11 <br />3/16/2006 45.84 -21.24 <br />6/6/2006 41.95 -17.35 <br />9/22/2006 50.08 -25.48 <br />12/12/2006 46.57 -21.97 <br />3/20/2007 48.08 -23.48 <br />6/22/2007 49.95 -25.35 <br />9/27/2007 54.02 -29.42 <br />2/12/2008 50.07 -25.47 <br />7/14/2008 56.00 -31.35 <br />10/16/2008 60.14 -35.49 <br />1/15/2009 61.11 -36.46 <br />9/18/2009 64.66 -40.01 <br />3/5/2010 56.94 -32.29 <br />9/9/2010 55.70 -31.05 <br />3/20/2011 45.78 -21.13 <br />9/1/2011 47.28 -22.63 <br />3/1/2012 48.30 -23.65 <br />12/17/2012 48.98 -24.33 <br />9/16/2013 54.70 -30.05 <br />4/24/2014 53.15 -28.50 <br />3/9/2015 59.15 -34.50 <br />8/18/2016 64.83 -40.18 <br />9/15/2016 65.80 -41.15 <br />3/7/2017 37.30 -12.65 <br />2/5/2018 38.43 -13.83 <br />9/19/2018 39.30 -14.65 <br />3/26/2020 --- --- <br />9/15/2020 - <br />3/23 & 3/24/2021 37.98 -13.33 <br />9/13 & 9/14/2021 44.54 -19.89 <br />APEX ENVIROTECH, INC. <br />SECOND SEMI-ANNUAL 2021 <br />Page 9 of 23 WFF02.001