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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 /> City of Lathrop- MWM-15 <br /> Groundwater Elevation <br /> 00 20 <br /> 00 <br /> o z 15 <br /> > 10 <br /> W <br /> d � <br /> 5 <br /> a c <br /> 3 � <br /> a, <br /> 3 0 <br /> o e <br /> C7 0 <br /> -5 <br /> a� Ln 1.0 r-. oo rn or-i N m v Ln �.O r� oo rn 0 -1 N m :t Ln �O r� oo rn o m � Ln <br /> ca co co co co ca ca ca ca co co co co ca ca ca ca co co co co co co co co co co co co co co <br /> Date <br /> MWM-15 MWM-15 <br /> Measuring Point NGVD 29 NAVD 88 Measuring Point NGVD 29 NAVD 88 <br /> MID 10.87 13.26 MID 10.87 13.26 <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 /> 5/24/2005 10.48 0.39 2.78 5/1/2012 10.00 0.87 3.26 <br /> 6/28/2005 10.25 0.62 3.01 7/27/2012 10.10 0.77 3.16 <br /> 10/12/2005 -- -- -- 10/24/2012 9.98 0.89 3.28 <br /> 1/31/2006 10.22 0.65 3.04 1/30/2013 10.37 0.50 2.89 <br /> 4/25/2006 9.19 1.68 4.07 5/1/2013 9.22 1.65 4.04 <br /> 7/19/2006 9.84 1.03 3.42 8/1/2013 9.93 0.94 3.33 <br /> 10/13/2006 10.70 0.17 2.56 11/21/2013 10.25 0.62 3.01 <br /> 1/23/2007 11.24 -0.37 2.02 2/4/2014 10.89 -0.02 2.37 <br /> 4/24/2007 11.1 -0.23 2.16 4/23/2014 10.64 0.23 2.62 <br /> 7/24/2007 10.67 0.20 2.59 8/7/2014 11.18 -0.31 2.08 <br /> 10/30/2007 10.82 0.05 2.44 10/30/2014 10.65 0.22 2.61 <br /> 1/24/2008 10.34 0.53 2.92 1/29/2015 10.48 0.39 2.78 <br /> 4/15/2008 11.05 -0.18 2.21 10/27/2015 10.82 0.05 2.44 <br /> 8/19/2008 11.05 -0.18 2.21 4/22/2016 10.03 0.84 3.23 <br /> 11/25/2008 12.65 -1.78 0.61 11/1/2016 10.28 0.59 2.98 <br /> 2/11/2009 10.98 -0.11 2.28 12/9/2016 10.32 0.55 2.94 <br /> 4/14/2009 10.80 0.07 2.46 5/4/2017 8.58 2.29 4.68 <br /> 7/30/2009 8.90 1.97 4.36 11/27/2017 9.44 1.43 3.82 <br /> 10/21/2009 9.77 1.10 3.49 5/4/2018 9.29 1.58 3.97 <br /> 1/27/2010 10.94 -0.07 2.32 11/6/2018 10.24 0.63 3.02 <br /> 5/6/2010 9.95 0.92 3.31 4/29/2019 9.10 1.77 4.16 <br /> 8/25/2010 10.60 0.27 2.66 11/1/2019 10.05 0.82 3.21 <br /> 10/27/2010 10.12 0.75 3.14 5/6/2020 9.86 1.01 3.40 <br /> 1/27/2011 9.31 1.56 3.95 11/5/2020 10.27 0.60 2.99 <br /> 4/26/2011 9.08 1.79 4.18 5/3/2021 9.30 1.57 3.96 <br /> 8/19/2011 9.65 1.22 3.61 10/18/2021 9.48 1.39 3.78 <br /> 10/26/2011 10.04 0.83 3.22 4/29/2022 10.05 0.82 3.21 <br /> 1/24/2012 10.52 0.35 2.74 <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,July 2005. <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.html) <br /> EKI Environment &Water, Inc. <br /> July 2023 Page 41 of 145 EKI B90088.03 <br />