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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-1 <br /> Groundwater Elevation <br /> 00 20 <br /> 00 <br /> o z 15 <br /> ai 10 <br /> W � <br /> 41 5 <br /> c� c <br /> 3 � <br /> v <br /> 3 0 <br /> o c <br /> c7 M <br /> m -5 <br /> 41 <br /> G/ Ln 1.0 n W M O ri N M I Ln 1.0 n W M O ri N M I Ln 1.0 n W M O r-I N M I Ln <br /> GJ Ol Ol Ol T T 0 0 0 0 0 0 0 0 0 0 1- 1- 1- 1- 1- 1- 1- 1- 1- 1- 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 /> MBRMW-1 MBRMW-1 <br /> Measuring Point NGVD 29 NAVD 88 Measuring Point NGVD 29 NAVD 88 <br /> MP 17.53 19.92 MP 17.53 19.92 <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 17.38 0.15 2.54 4/25/2012 12.95 4.58 6.97 <br /> 6/28/2005 17.85 -0.32 2.07 8/2/2012 13.95 3.58 5.97 <br /> 10/12/2005 17.02 0.51 2.90 11/8/2012 14.84 2.69 5.08 <br /> 1/31/2006 16.25 1.28 3.67 2/1/2013 13.47 4.06 6.45 <br /> 4/25/2006 15.54 1.99 4.38 5/3/2013 13.71 3.82 6.21 <br /> 7/19/2006 15.46 2.07 4.46 8/6/2013 14.89 2.64 5.03 <br /> 10/13/2006 15.33 2.20 4.59 11/22/2013 15.28 2.25 4.64 <br /> 1/23/2007 14.30 3.23 5.62 2/7/2014 15.37 2.16 4.55 <br /> 4/24/2007 14.24 3.29 5.68 4/25/2014 14.86 2.67 5.06 <br /> 7/24/2007 14.53 3.00 5.39 8/1/2014 14.91 2.62 5.01 <br /> 10/30/2007 14.61 2.92 5.31 11/5/2014 16.38 1.15 3.54 <br /> 1/24/2008 14.34 3.19 5.58 2/3/2015 13.93 3.60 5.99 <br /> 4/15/2008 13.92 3.61 6.00 4/27/2015 13.91 3.62 6.01 <br /> 8/22/2008 14.59 2.94 5.33 10/21/2015 15.12 2.41 4.80 <br /> 11/19/2008 14.15 3.38 5.77 10/28/2015 15.18 2.35 4.74 <br /> 2/9/2009 13.66 3.87 6.26 4/25/2016 13.80 3.73 6.12 <br /> 4/16/2009 13.50 4.03 6.42 8/5/2016 14.60 2.93 5.32 <br /> 7/27/2009 14.39 3.14 5.53 12/7/2016 15.93 1.60 3.99 <br /> 10/19/2009 15.01 2.52 4.91 5/9/2017 14.20 3.33 5.72 <br /> 1/25/2010 14.00 3.53 5.92 11/28/2017 14.50 3.03 5.42 <br /> 4/21/2010 12.44 5.09 7.48 5/3/2018 13.64 3.89 6.28 <br /> 8/23/2010 13.55 3.98 6.37 11/5/2018 15.10 2.43 4.82 <br /> 10/27/2010 13.94 3.59 5.98 5/1/2019 14.38 3.15 5.54 <br /> 1/19/2011 12.39 5.14 7.53 5/2/2019 15.38 2.15 4.54 <br /> 4/19/2011 11.38 6.15 8.54 10/31/2019 14.52 3.01 5.40 <br /> 8/16/2011 12.74 4.79 7.18 5/8/2020 12.81 4.72 7.11 <br /> 11/1/2011 13.41 4.12 6.51 11/4/2020 14.28 3.25 5.64 <br /> 1/25/2012 13.31 4.22 6.61 5/7/2021 13.98 3.55 5.94 <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 63 of 145 EKI B90088.03 <br />