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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- MWR-26 <br /> Groundwater Elevation <br /> 00 20 <br /> 00 <br /> o z 15 <br /> 10 <br /> tX <br /> W � <br /> d � <br /> 5 <br /> a c <br /> 3 � <br /> a, <br /> 3 0 <br /> L.o e <br /> (9 0 <br /> ++ <br /> tu -5 <br /> a) Ln 1.0 r-. oo rn or-i N m v Ln �.o r� oo rn o N m � Ln r*1 oo rn o m � Ln <br /> d 01 01 01 T T O O O O O O O O O O <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 /> MWR-26 MWR-26 <br /> Measuring Point NGVD 29 NAVD 88 Measuring Point NGVD 29 NAVD 88 <br /> MP 12.36 14.75 MP 12.36 14.75 <br /> Groundwater Groundwater Groundwater <br /> Groundwater Elevation <br /> Date Sampled DTW(ft) Elevation Elevation Date Sampled DTW(ft) Elevation <br /> ft, NGVD 29 ft,NAVD 88 ft, NGVD 29 (ft,NAVD 88) <br /> 8/31/2005 8.55 3.81 6.20 7/24/2012 9.5 2.9 5.2 <br /> 11/28/2005 9.70 2.66 5.05 10/9/2012 9.7 2.6 5.0 <br /> 2/8/2006 8.82 3.54 5.93 1/29/2013 8.7 3.7 6.1 <br /> 4/25/2006 5.7 6.7 9.1 4/2/2013 9.5 2.9 5.3 <br /> 7/19/2006 8.2 4.2 6.6 7/29/2013 8.99 3.37 5.76 <br /> 10/13/2006 8.5 3.9 6.3 11/18/2013 10.0 2.3 4.7 <br /> 1/23/2007 10.4 2.0 4.4 1/28/2014 10.0 2.4 4.8 <br /> 4/24/2007 10.4 2.0 4.4 4/22/2014 9.9 2.5 4.9 <br /> 7/24/2007 10.3 2.1 4.5 7/31/2014 9.3 3.1 5.5 <br /> 10/30/2007 10.4 2.0 4.4 11/4/2014 9.3 3.1 5.5 <br /> 1/24/2008 10.1 2.3 4.7 1/29/2015 8.1 4.3 6.7 <br /> 4/15/2008 10.1 2.3 4.7 10/8/2015 14.72 -2.36 0.03 <br /> 8/21/2008 9.8 2.6 5.0 10/27/2015 14.4 -2.0 0.4 <br /> 10/8/2008 10.0 2.4 4.8 4/25/2016 9.3 3.1 5.5 <br /> 2/9/2009 10.1 2.3 4.7 11/4/2016 8.6 3.8 6.2 <br /> 4/12/2009 11.3 1.1 3.5 12/6/2016 8.50 3.86 6.25 <br /> 8/4/2009 9.7 2.7 5.1 5/8/2017 5.7 6.7 9.1 <br /> 10/1/2009 10.1 2.3 4.7 11/30/2017 9.41 2.95 5.34 <br /> 2/9/2010 9.7 2.7 5.1 5/4/2018 8.9 3.5 5.9 <br /> 4/11/2010 9.6 2.8 5.2 11/7/2018 9.05 3.31 5.70 <br /> 8/27/2010 9.4 3.0 5.4 5/3/2019 7.95 4.41 6.80 <br /> 10/3/2010 9.8 2.6 5.0 10/29/2019 8.83 3.53 5.92 <br /> 1/18/2011 9.5 2.9 5.3 4/16/2020 9.90 2.46 4.85 <br /> 4/10/2011 9.1 3.3 5.7 11/3/2020 9.8 2.54 4.93 <br /> 8/15/2011 7.4 5.0 7.4 5/5/2021 9.89 2.47 4.86 <br /> 10/10/2011 8.1 4.3 6.7 10/20/2021 9.69 2.67 5.06 <br /> 1/26/2012 9.5 2.9 5.3 5/10/2022 9.56 2.80 5.19 <br /> 4/4/2012 8.5 3.9 6.3 11/7/2022 9.50 2.86 5.25 <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 Carlson, Barbee,&Gibson, October 2005. <br /> (b)Surveyed elevations referenced to NAVD 88 and converted to NGVD 29 by subtracting 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 127 of 145 EKI 1390088.03 <br />