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Appendix B- Historical Water Levels City of Lathrop <br /> Consolidated Treatment Facility <br /> Monitoring and Reporting Program R5-2016-0028-03 Rev 3 <br /> W-2 W-2 <br /> Measuring Point NGVD 29 NAVD 88 Measuring Point NGVD 29 NAVD 88 <br /> MID 13.83 16.22 MP 13.83 16.22 <br /> Groundwater Groundwater Groundwater Groundwater <br /> Date Sampled DTW(ft) Elevation Elevation Date Sampled DTW(ft) Elevation Elevation <br /> ft NGVD 29 ft NAVD 88 ft NGVD 29 ft,NAVD 88 <br /> Feb-00 10.67 3.16 5.55 1/23/2012 9.76 4.07 6.46 <br /> Mar-00 10.00 3.83 6.22 4/26/2012 10.65 3.18 5.57 <br /> Apr-00 13.30 0.53 2.92 8/1/2012 11.62 2.21 4.60 <br /> May-00 13.50 0.33 2.72 10/29/2012 11.65 2.18 4.57 <br /> Jun-00 13.30 0.53 2.92 2/4/2013 10.00 3.83 6.22 <br /> Jul-00 13.30 0.53 2.92 5/6/2013 10.83 3.00 5.39 <br /> Sep-00 13.30 0.53 2.92 8/5/2013 12.20 1.63 4.02 <br /> Oct-00 13.60 0.23 2.62 11/19/2013 11.91 1.92 4.31 <br /> Nov-00 12.8 1.03 3.42 2/6/2014 11.8 2.03 4.42 <br /> Dec-00 17.08 -3.25 -0.86 4/28/2014 11.73 2.10 4.49 <br /> Jan-01 17.08 -3.25 -0.86 8/6/2014 12.88 0.95 3.34 <br /> Feb-01 10.50 3.33 5.72 11/4/2014 12.44 1.39 3.78 <br /> Mar-01 11.80 2.03 4.42 2/2/2015 10.96 2.87 5.26 <br /> Apr-01 11.67 2.16 4.55 4/27/2015 11.51 2.32 4.71 <br /> 10/11/2002 13.00 0.83 3.22 7/27/2015 12.50 1.33 3.72 <br /> 1/24/2003 15.00 -1.17 1.22 8/31/2015 12.71 1.12 3.51 <br /> 4/16/2003 11.50 2.33 4.72 10/29/2015 12.58 1.25 3.64 <br /> 9/24/2003 14.70 -0.87 1.52 2/4/2016 10.65 3.18 5.57 <br /> 2/19/2004 13.40 0.43 2.82 4/21/2016 9.75 4.08 6.47 <br /> 4/20/2004 13.58 0.25 2.64 8/8/2016 12.10 1.73 4.12 <br /> 7/28/2004 15.53 -1.70 0.69 12/7/2016 11.92 1.91 4.30 <br /> 12/1/2004 16.56 -2.73 -0.34 11/28/2017 10.73 3.10 5.49 <br /> 4/21/2005 14.72 -0.89 1.50 11/5/2018 12.25 1.58 3.97 <br /> 8/18/2005 16.86 -3.03 -0.64 10/31/2019 11.00 2.83 5.22 <br /> 10/12/2005 15.25 -1.42 0.97 11/4/2020 11.45 2.38 4.77 <br /> 1/26/2006 13.82 0.01 2.40 10/19/2021 12.28 1.55 3.94 <br /> 5/1/2006 11.84 1.99 4.38 11/8/2022 11.94 1.89 4.28 <br /> 8/15/2006 12.80 1.03 3.42 <br /> 10/23/2006 12.29 1.54 3.93 <br /> 1/30/2007 11.15 2.68 5.07 <br /> 4/30/2007 11.73 2.10 4.49 <br /> 8/2/2007 12.74 1.09 3.48 <br /> 12/3/2007 11.80 2.03 4.42 <br /> 2/18/2008 10.25 3.58 5.97 <br /> 4/16/2008 11.10 2.73 5.12 <br /> 7/15/2008 12.15 1.68 4.07 <br /> 10/20/2008 11.80 2.03 4.42 <br /> 1/12/2009 11.17 2.66 5.05 <br /> 4/20/2009 11.03 2.80 5.19 <br /> 7/27/2009 12.00 1.83 4.22 <br /> 10/26/2009 11.32 2.51 4.90 <br /> 2/5/2010 9.86 3.97 6.36 <br /> 5/3/2010 9.39 4.44 6.83 <br /> 8/3/2010 10.90 2.93 5.32 <br /> 10/14/2010 11.90 1.93 4.32 <br /> 3/3/2011 8.15 5.68 8.07 <br /> 4/20/2011 8.31 5.52 7.91 <br /> 8/22/2011 9.91 3.92 6.31 <br /> 10/31/2011 9.81 4.02 6.41 <br /> Abbreviations: <br /> DTW=depth to water <br /> ft=feet <br /> MP=measuring point <br /> NAVD 88= North American Vertical Datum of 1988 <br /> NGVD 29=National Geodetic Vertical Datum of 1929 <br /> Notes: <br /> (a) MP elevation surveyed by MacKay&Somps, February 2015. <br /> (b)Surveyed elevations referenced to NGVD 29 and converted to NAVD 88 by adding 2.39 ft. Datum conversion factor determined <br /> from National Geodetic Survey Vertcon website and is an average for the area. (www.ngs.noaa.gov/TOOLS/Vertcon/vertcon.htmi) <br /> EKI Environment &Water, Inc. <br /> July 2023 Page 90 of 145 EKI 1390088.03 <br />