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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 - RMW-5 <br /> Groundwater Elevation <br /> 000 20 <br /> 0 <br /> o z 15 <br /> ai 10 <br /> W <br /> GJ � <br /> 5 <br /> 3 <br /> v <br /> 0 <br /> c7o c <br /> .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 N M � un 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- r- 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 co co co co co co co co co co co co co co co co co co co <br /> Date <br /> RMW-5 RMW-5 <br /> Measuring Point NGVD 29 NAVD 88 Measuring Point NGVD 29 NAVD 88 <br /> MP 20.87 23.26 MP 20.87 23.26 <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 /> 10/3/2005 19.75 1.12 3.51 7/24/2012 18.11 2.76 5.15 <br /> 1/3/2006 15.96 4.91 7.30 10/30/2012 18.37 2.50 4.89 <br /> 2/8/2006 14.60 6.27 8.66 2/5/2013 14.85 6.02 8.41 <br /> 5/5/2006 13.42 7.45 9.84 5/3/2013 16.01 4.86 7.25 <br /> 7/19/2006 17.54 3.33 5.72 8/6/2013 19.25 1.62 4.01 <br /> 10/13/2006 16.78 4.09 6.48 11/22/2013 18.55 2.32 4.71 <br /> 1/23/2007 14.57 6.30 8.69 2/7/2014 18.57 2.30 4.69 <br /> 4/24/2007 15.35 5.52 7.91 4/29/2014 18.47 2.40 4.79 <br /> 8/3/2007 18.88 1.99 4.38 8/1/2014 20.14 0.73 3.12 <br /> 10/30/2007 17.63 3.24 5.63 11/3/2014 18.79 2.08 4.47 <br /> 1/24/2008 15.57 5.30 7.69 1/30/2015 16.49 4.38 6.77 <br /> 4/21/2008 16.91 3.96 6.35 10/21/2015 20.27 0.60 2.99 <br /> 8/22/2008 20.57 0.30 2.69 10/28/2015 20.28 0.59 2.98 <br /> 11/19/2008 19.95 0.92 3.31 4/25/2016 17.65 3.22 5.61 <br /> 2/9/2009 15.95 4.92 7.31 10/31/2016 20.02 0.85 3.24 <br /> 4/16/2009 16.30 4.57 6.96 11/1/2016 19.82 1.05 3.44 <br /> 7/27/2009 19.96 0.91 3.30 12/7/2016 19.40 1.47 3.86 <br /> 10/19/2009 18.88 1.99 4.38 5/5/2017 14.47 6.40 8.79 <br /> 1/25/2010 16.25 4.62 7.01 11/28/2017 16.42 4.45 6.84 <br /> 5/6/2010 15.68 5.19 7.58 5/2/2018 16.07 4.80 7.19 <br /> 8/23/2010 19.91 0.96 3.35 11/5/2018 18.80 2.07 4.46 <br /> 10/20/2010 18.33 2.54 4.93 5/2/2019 13.75 7.12 9.51 <br /> 1/19/2011 14.75 6.12 8.51 10/31/2019 13.92 6.95 9.34 <br /> 4/25/2011 14.33 6.54 8.93 5/6/2020 13.44 7.43 9.82 <br /> 8/19/2011 17.37 3.50 5.89 11/4/2020 16.79 4.08 6.47 <br /> 10/25/2011 15.68 5.19 7.58 5/7/2021 20.00 0.87 3.26 <br /> 1/23/2012 14.84 6.03 8.42 10/19/2021 21.98 -1.11 1.28 <br /> 4/27/2012 15.02 5.85 8.24 4/29/2022 20.48 0.39 2.78 <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, October 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 101 of 145 EKI B90088.03 <br />