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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-5 <br /> Groundwater Elevation <br /> 20 <br /> 00 <br /> 0 z 15 <br /> ai a>i 10 <br /> W � <br /> (U <br /> 5 <br /> 3 <br /> v <br /> 0 <br /> 0 c <br /> c7 0 <br /> m -5 <br /> 41 u'f lD r� W Ql O -I N M �t u'1 lD r, 00 Ql O -I (,AM :I- uO lD I� 00 Ql O c-I N M � u'f <br /> GJ 01 01 01 01 01 O O O O O O O O O O r-I r-I r-I .� .� .� .� .� .� .� N N N N N N <br /> co co co co co co co co co co co co co co co co co co co co co co co co co co co co co co co <br /> Date <br /> MWM-5 MWM-5 <br /> Measuring Point NGVD 29 NAVD 88 Measuring Point NGVD 29 NAVD 88 <br /> MP 11.96 14.35 MP 11.96 14.35 <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 /> 5/20/2005 11.70 0.26 2.65 5/3/2012 8.50 3.46 5.85 <br /> 6/28/2005 12.36 -0.40 1.99 8/1/2012 11.05 0.91 3.30 <br /> 10/12/2005 12.80 -0.84 1.55 10/25/2012 11.08 0.88 3.27 <br /> 1/31/2006 11.87 0.09 2.48 1/31/2013 10.53 1.43 3.82 <br /> 4/25/2006 9.24 2.72 5.11 5/2/2013 11.19 0.77 3.16 <br /> 7/19/2006 12.38 -0.42 1.97 8/2/2013 11.48 0.48 2.87 <br /> 10/13/2006 12.04 -0.08 2.31 11/21/2013 11.09 0.87 3.26 <br /> 1/23/2007 11.40 0.56 2.95 2/4/2014 11.94 0.02 2.41 <br /> 4/24/2007 11.73 0.23 2.62 4/24/2014 11.72 0.24 2.63 <br /> 7/24/2007 12.14 -0.18 2.21 8/5/2014 11.72 0.24 2.63 <br /> 10/30/2007 11.43 0.53 2.92 10/30/2014 11.51 0.45 2.84 <br /> 1/24/2008 11.07 0.89 3.28 1/28/2015 12.48 -0.52 1.87 <br /> 4/15/2008 10.94 1.02 3.41 10/22/2015 11.09 0.87 3.26 <br /> 8/25/2008 10.32 1.64 4.03 10/27/2015 11.08 0.88 3.27 <br /> 11/24/2008 10.22 1.74 4.13 4/22/2016 10.48 1.48 3.87 <br /> 2/17/2009 9.08 2.88 5.27 11/1/2016 11.80 0.16 2.55 <br /> 4/15/2009 9.72 2.24 4.63 12/7/2016 11.95 0.01 2.40 <br /> 7/29/2009 9.98 1.98 4.37 5/5/2017 8.95 3.01 5.40 <br /> 10/22/2009 10.63 1.33 3.72 11/27/2017 10.78 1.18 3.57 <br /> 2/1/2010 9.53 2.43 4.82 11/27/2017 10.52 1.44 3.83 <br /> 4/22/2010 9.23 2.73 5.12 5/4/2018 11.04 0.92 3.31 <br /> 8/26/2010 10.00 1.96 4.35 11/7/2018 10.72 1.24 3.63 <br /> 10/21/2010 10.81 1.15 3.54 4/29/2019 10.01 1.95 4.34 <br /> 1/24/2011 8.64 3.32 5.71 10/29/2019 11.36 0.60 2.99 <br /> 4/25/2011 8.67 3.29 5.68 5/8/2020 11.64 0.32 2.71 <br /> 8/18/2011 9.29 2.67 5.06 11/3/2020 11.68 0.28 2.67 <br /> 10/27/2011 9.80 2.16 4.55 5/4/2021 11.90 0.06 2.45 <br /> 1/24/2012 9.99 1.97 4.36 10/20/2021 12.03 -0.07 2.32 <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 26 of 145 EKI B90088.03 <br />