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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-4 <br /> Groundwater Elevation <br /> 00 20 <br /> 00 <br /> o z 15 <br /> > 10 <br /> W <br /> d � <br /> 5 <br /> a c <br /> 3 � <br /> a, <br /> eE <br /> 0 <br /> 0 <br /> V <br /> ++ <br /> -5 <br /> a� Ln 1.0 r-. oo rn o c14 m v Ln �0 r� oo rn o N m � Ln �.o r-1 oo rn o m � Ln <br /> d M M M M M O O O O O O O O O O N N N N N N <br /> ca co co co co ca ca ca ca co co co co ca ca ca ca co co co co co co co co co co co co co co <br /> Date <br /> RMW-4 RMW-4 <br /> Measuring Point NGVD 29 NAVD 88 Measuring Point NGVD 29 NAVD 88 <br /> MID 21.61 24.00 MID 21.61 24.00 <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 20.76 0.85 3.24 7/24/2012 18.30 3.31 5.70 <br /> 1/3/2006 17.47 4.14 6.53 10/30/2012 18.04 3.57 5.96 <br /> 2/8/2006 16.22 5.39 7.78 2/5/2013 16.22 5.39 7.78 <br /> 5/5/2006 15.69 5.92 8.31 5/3/2013 17.05 4.56 6.95 <br /> 7/19/2006 18.21 3.40 5.79 8/6/2013 19.61 2.00 4.39 <br /> 10/13/2006 18.25 3.36 5.75 11/22/2013 18.91 2.70 5.09 <br /> 1/23/2007 16.43 5.18 7.57 2/7/2014 18.62 2.99 5.38 <br /> 4/24/2007 17.17 4.44 6.83 4/29/2014 20.29 1.32 3.71 <br /> 8/3/2007 21.05 0.56 2.95 8/1/2014 21.8 -0.19 2.20 <br /> 10/30/2007 19.05 2.56 4.95 11/3/2014 20.80 0.81 3.20 <br /> 1/24/2008 17.17 4.44 6.83 1/30/2015 18.15 3.46 5.85 <br /> 4/21/2008 18.57 3.04 5.43 10/21/2015 21.88 -0.27 2.12 <br /> 8/22/2008 22.23 -0.62 1.77 10/28/2015 22.21 -0.60 1.79 <br /> 11/19/2008 19.95 1.66 4.05 4/25/2016 17.80 3.81 6.20 <br /> 2/9/2009 17.31 4.30 6.69 10/31/2016 20.69 0.92 3.31 <br /> 4/16/2009 17.90 3.71 6.10 11/1/2016 20.37 1.24 3.63 <br /> 7/27/2009 22.10 -0.49 1.90 12/7/2016 19.29 2.32 4.71 <br /> 10/19/2009 19.65 1.96 4.35 5/5/2017 16.02 5.59 7.98 <br /> 1/25/2010 17.71 3.90 6.29 11/28/2017 16.55 5.06 7.45 <br /> 5/6/2010 17.60 4.01 6.40 5/2/2018 17.51 4.10 6.49 <br /> 8/23/2010 20.94 0.67 3.06 11/5/2018 19.55 2.06 4.45 <br /> 11/1/2010 18.13 3.48 5.87 5/2/2019 15.76 5.85 8.24 <br /> 1/19/2011 15.74 5.87 8.26 10/31/2019 14.46 7.15 9.54 <br /> 4/25/2011 16.19 5.42 7.81 5/6/2020 15.00 6.61 9.00 <br /> 8/19/2011 17.78 3.83 6.22 11/4/2020 16.54 5.07 7.46 <br /> 10/25/2011 16.73 4.88 7.27 5/7/2021 21.72 -0.11 2.28 <br /> 1/23/2012 15.90 5.71 8.10 10/19/2021 22.27 -0.66 1.73 <br /> 4/27/2012 16.43 5.18 7.57 4/29/2022 21.20 0.41 2.80 <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 99 of 145 EKI B90088.03 <br />