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Monitoring <br />Well <br />Date Reference <br />Elevation* <br />(feet) <br />Depth to <br />Groundwater <br />(feet) <br />Groundwater <br />Elevation <br />(feet) <br />MW-10 9/28/2007 24.53 54.27 -29.74 <br />2/12/2008 50.80 -26.27 <br />7/14/2008 56.46 -31.93 <br />10/16/2008 60.38 -35.85 <br />1/15/2009 61.19 -36.66 <br />9/18/2009 64.70 -40.17 <br />3/5/2010 57.22 -32.69 <br />9/9/2010 55.89 -31.36 <br />3/20/2011 46.95 -22.42 <br />9/1/2011 48.58 -24.05 <br />3/1/2012 48.67 -24.14 <br />9/16/2013 - - <br />4/24/2014 - - <br />3/9/2015 59.29 -34.76 <br />9/15/2016 65.94 -41.41 <br />3/17/2017 38.77 -14.24 <br />2/21/2018 39.85 -15.32 <br />3/26/2020 <br />9/15/2020 -- - <br />3/23 & 3/24/2021 38.50 -13.97 <br />9/13 & 9/14/2021 44.88 -20.35 <br />Well Extraction Wells <br />EW-1 3/26/2020 - 33.50 - <br />9/15/2020 37.90 - <br />3/23 & 3/24/2021 Product (37.52) -- <br />9/13 & 9/14/2021 Product (44.62) <br />EW-2 3/26/2020 - 33.89 - <br />' 9/15/2020 38.18 - <br />3/23 & 3/24/2021 38.07 - <br />9/13 & 9/14/2021 44.93 <br />EW-3 3/26/2020 - 33.67 -- <br />9/15/2020 37.84 - <br />3/23 & 3/24/2021 37.69 - <br />9/13 & 9/14/2021 44.85 - <br />EW-4 9/15/2020 -- -- <br />3/23 & 3/24/2021 38.03 -- <br />9/13 & 9/14/2021 44.84 - <br />EW-5 9/15/2020 - -- <br />3/23 & 3/24/2021 37.77 <br />9/13 & 9/14/2021 44.50 - <br />EW-6 9/15/2020 -- - <br />3/23 & 3/24/2021 37.65 <br />9/13 & 9/14/2021 43.46 --- <br />EW-7 9/15/2020 -- <br />3/23 & 3/24/2021 38.23 <br />9/13 & 9/14/2021 44.94 <br />EW-8 9/15/2020 --- - <br />3/23 & 3/24/2021 37.64 --- <br />9/13 & 9/14/2021 44.45 --- <br />EW-9 9/15/2020 --- <br />3/23 & 3/24/2021 37.58 <br />9/13 & 9/14/2021 44.41 <br />Notes: <br />TABLE 4 <br />HISTORICAL GROUNDWATER ELEVATION DATA <br />Waterloo Food Fuel <br />3032 East Waterloo Road <br />Stockton, California <br />Data before December 17, 2019 accumulated by <br />Advanced Geo Environmental <br />- Not calculated <br />NS - Not surveyed <br />- Top of casing surveyed to mean sea level <br />** - Destroyed <br />- Obstructed <br />Page 23 of 23 <br />APEX ENVIROTECH, INC. <br />SECOND SEMI-ANNUAL 2021 <br />WFF02.001