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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 - MBRMW-2 <br /> Groundwater Elevation <br /> 00 20 <br /> 00 <br /> o z 15 <br /> �a a, <br /> ai ai 10 <br /> W � <br /> *1 5 <br /> c� c <br /> 3 � <br /> v <br /> 3 0 <br /> o c <br /> c7 0 <br /> 4 <br /> -5 <br /> 1 <br /> G/ Ln 1.0 r� W M O c I N M � M l0 r� W M O ri N M � Ln 1.0 r� W M O r-I N M � Ln <br /> GJ Ol Ol Ol T T 0 0 0 0 0 0 0 0 0 0 1- 1- r- r- r- r- 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 ca ca ca ca co co co ca ca ra ra <br /> Date <br /> MBRMW-2 MBRMW-2 <br /> Measuring Point NGVD 29 NAVD 88 Measuring Point NGVD 29 NAVD 88 <br /> MP 17.65 20.04 MP 17.65 20.04 <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 /> 5/26/2005 17.10 0.55 2.94 4/25/2012 12.90 4.75 7.14 <br /> 6/28/2005 17.64 0.01 2.40 7/31/2012 14.01 3.64 6.03 <br /> 10/12/2005 17.87 -0.22 2.17 11/26/2012 14.84 2.81 5.20 <br /> 1/31/2006 17.25 0.40 2.79 2/1/2013 13.24 4.41 6.80 <br /> 4/25/2006 16.49 1.16 3.55 5/3/2013 13.49 4.16 6.55 <br /> 7/19/2006 15.82 1.83 4.22 8/6/2013 15.00 2.65 5.04 <br /> 10/13/2006 15.84 1.81 4.20 11/22/2013 15.42 2.23 4.62 <br /> 1/23/2007 15.30 2.35 4.74 2/7/2014 15.41 2.24 4.63 <br /> 4/24/2007 14.89 2.76 5.15 4/25/2014 14.86 2.79 5.18 <br /> 7/24/2007 15.10 2.55 4.94 8/1/2014 15.56 2.09 4.48 <br /> 10/30/2007 15.33 2.32 4.71 11/5/2014 15.76 1.89 4.28 <br /> 1/24/2008 14.76 2.89 5.28 2/3/2015 14.44 3.21 5.60 <br /> 4/15/2008 14.13 3.52 5.91 4/27/2015 14.30 3.35 5.74 <br /> 8/22/2008 15.01 2.64 5.03 10/21/2015 15.61 2.04 4.43 <br /> 11/19/2008 14.82 2.83 5.22 10/28/2015 15.66 1.99 4.38 <br /> 2/9/2009 14.45 3.20 5.59 4/25/2016 14.00 3.65 6.04 <br /> 4/16/2009 14.00 3.65 6.04 8/5/2016 14.90 2.75 5.14 <br /> 7/27/2009 14.79 2.86 5.25 12/7/2016 15.74 1.91 4.30 <br /> 10/19/2009 15.28 2.37 4.76 5/9/2017 12.90 4.75 7.14 <br /> 1/25/2010 14.63 3.02 5.41 11/28/2017 14.47 3.18 5.57 <br /> 4/21/2010 12.92 4.73 7.12 11/28/2017 14.43 3.22 5.61 <br /> 8/23/2010 13.92 3.73 6.12 5/3/2018 13.50 4.15 6.54 <br /> 10/27/2010 14.18 3.47 5.86 11/5/2018 15.11 2.54 4.93 <br /> 1/19/2011 12.65 5.00 7.39 5/1/2019 13.78 3.87 6.26 <br /> 4/19/2011 11.00 6.65 9.04 10/31/2019 14.64 3.01 5.40 <br /> 8/16/2011 12.75 4.90 7.29 5/8/2020 13.66 3.99 6.38 <br /> 11/1/2011 13.37 4.28 6.67 11/4/2020 14.49 3.16 5.55 <br /> 1/25/2012 13.22 4.43 6.82 5/7/2021 14.58 3.07 5.46 <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.html) <br /> EKI Environment &Water, Inc. <br /> July 2023 Page 65 of 145 EKI B90088.03 <br />