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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-3 <br /> Groundwater Elevation <br /> 00 20 <br /> 00 <br /> o z 15 <br /> ai 10 <br /> W � <br /> S <br /> o c <br /> 3 � <br /> v <br /> 3 0 <br /> o c <br /> c7 0 <br /> -5 <br /> G/ u'1 lD n 00 Ql O c-I N M � 111 l4 n W Ol O r-I N M � L!1 1.0 n 00 Ol O r-I N M � if 1 <br /> GJ 01 01 01 T T O O O O O O O O O O r- r- r- r- r- 1- r- r- r- r- N N N N N N <br /> co co co co co co co co co co co co ro ro ro ro ro ro ro ra co ca ca ca co co co ca ca ra ra <br /> Date <br /> MWM-3 MWM-3 <br /> Measuring Point NGVD 29 NAVD 88 Measuring Point NGVD 29 NAVD 88 <br /> MP 13.12 15.51 MP 13.12 15.51 <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 /> 7/5/2005 11.35 1.77 4.16 7/30/2012 11.96 1.16 3.55 <br /> 7/19/2005 11.84 1.28 3.67 10/25/2012 11.91 1.21 3.60 <br /> 10/12/2005 12.63 0.49 2.88 1/31/2013 11.41 1.71 4.10 <br /> 1/31/2006 11.56 1.56 3.95 5/2/2013 12.01 1.11 3.50 <br /> 4/25/2006 8.29 4.83 7.22 8/2/2013 12.34 0.78 3.17 <br /> 7/19/2006 14.78 -1.66 0.73 11/20/2013 13.36 -0.24 2.15 <br /> 10/13/2006 12.51 0.61 3.00 2/4/2014 12.74 0.38 2.77 <br /> 1/23/2007 12.32 0.80 3.19 4/24/2014 12.35 0.77 3.16 <br /> 4/24/2007 12.39 0.73 3.12 8/5/2014 12.44 0.68 3.07 <br /> 7/24/2007 12.85 0.27 2.66 10/30/2014 13.05 0.07 2.46 <br /> 10/30/2007 12.14 0.98 3.37 1/28/2015 12.51 0.61 3.00 <br /> 1/24/2008 11.75 1.37 3.76 10/22/2015 11.75 1.37 3.76 <br /> 4/15/2008 11.27 1.85 4.24 10/27/2015 11.75 1.37 3.76 <br /> 8/25/2008 11.12 2.00 4.39 4/22/2016 11.20 1.92 4.31 <br /> 11/24/2008 11.28 1.84 4.23 11/1/2016 12.35 0.77 3.16 <br /> 4/15/2009 10.73 2.39 4.78 12/7/2016 12.72 0.40 2.79 <br /> 7/29/2009 10.90 2.22 4.61 5/4/2017 8.60 4.52 6.91 <br /> 10/22/2009 11.35 1.77 4.16 11/27/2017 11.48 1.64 4.03 <br /> 2/1/2010 10.36 2.76 5.15 5/4/2018 11.55 1.57 3.96 <br /> 4/22/2010 10.02 3.10 5.49 11/6/2018 11.47 1.65 4.04 <br /> 8/26/2010 11.00 2.12 4.51 4/29/2019 10.20 2.92 5.31 <br /> 10/21/2010 10.13 2.99 5.38 10/29/2019 11.99 1.13 3.52 <br /> 1/25/2011 8.87 4.25 6.64 5/6/2020 12.38 0.74 3.13 <br /> 4/25/2011 7.79 5.33 7.72 11/3/2020 12.30 0.82 3.21 <br /> 8/18/2011 9.91 3.21 5.60 5/3/2021 12.70 0.42 2.81 <br /> 10/27/2011 10.41 2.71 5.10 10/20/2021 12.73 0.39 2.78 <br /> 1/24/2012 10.95 2.17 4.56 4/29/2022 12.28 0.84 3.23 <br /> 5/3/2012 10.36 2.76 5.15 11/8/2022 12.37 0.75 3.14 <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 22 of 145 EKI B90088.03 <br />