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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-32 <br /> Groundwater Elevation <br /> 00 10 <br /> 00 <br /> o z 5 <br /> ra � <br /> a, 0 <br /> W <br /> L <br /> -5 <br /> m c <br /> 3 M <br /> -10 <br /> o c <br /> -15 <br /> Ln W r` oo rn O -1 N m � Ln W r\ oo am O r-1 N rn Ln W r` oo M O r-i r14 m � Ln <br /> Ql Ql Ol Ol Ol O O O O O O O O O O c-1 c-1 c-1 c-I c-I c-I c-I c-I c-I c-I N N N N N N <br /> Date <br /> MWR-32 MWR-32 <br /> Measuring Point NGVD 29 NAVD 88 Measuring Point NGVD 29 NAVD 88 <br /> MID 9.58 11.97 MID 9.58 11.97 <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 /> 8/31/2005 7.63 1.95 4.34 7/24/2012 9.1 0.5 2.8 <br /> 11/29/2005 9.10 0.48 2.87 10/9/2012 7.7 1.9 4.3 <br /> 2/8/2006 8.12 1.46 3.85 1/29/2013 8.8 0.8 3.2 <br /> 4/25/2006 6.6 3.0 5.4 4/2/2013 9.0 0.6 3.0 <br /> 7/19/2006 6.3 3.3 5.7 7/20/2013 7.4 2.1 4.5 <br /> 10/13/2006 9.0 0.6 3.0 11/18/2013 11.6 -2.0 0.4 <br /> 1/23/2007 9.6 0.0 2.4 1/28/2014 8.5 1.1 3.5 <br /> 4/24/2007 7.1 2.5 4.9 4/22/2014 8.4 1.2 3.6 <br /> 7/24/2007 7.7 1.9 4.3 7/31/2014 7.2 2.4 4.8 <br /> 10/30/2007 9.2 0.4 2.8 11/4/2014 8.5 1.1 3.5 <br /> 1/24/2008 8.6 1.0 3.4 1/29/2015 8.3 1.3 3.7 <br /> 4/15/2008 7.8 1.8 4.2 10/21/2015 9.38 0.20 2.59 <br /> 8/21/2008 7.0 2.6 5.0 10/27/2015 9.5 0.1 2.5 <br /> 10/8/2008 9.8 -0.2 2.2 4/25/2016 8.6 1.0 3.4 <br /> 2/9/2009 9.4 0.2 2.6 11/4/2016 8.4 1.2 3.6 <br /> 4/12/2009 9.1 0.5 2.9 12/6/2016 9.22 0.36 2.75 <br /> 8/4/2009 10.8 -1.2 1.2 5/8/2017 7.2 2.4 4.8 <br /> 10/1/2009 8.7 0.9 3.3 11/30/2017 9.40 0.18 2.57 <br /> 2/9/2010 8.4 1.2 3.6 5/4/2018 8.5 1.1 3.5 <br /> 4/11/2010 9.0 0.6 3.0 11/7/2018 9.20 0.38 2.77 <br /> 8/27/2010 8.0 1.6 4.0 5/3/2019 9.67 -0.09 2.30 <br /> 10/3/2010 8.2 1.4 3.8 10/29/2019 9.61 -0.03 2.36 <br /> 1/18/2011 8.8 0.8 3.2 4/16/2020 9.50 0.08 2.47 <br /> 4/10/2011 7.2 2.4 4.8 5/11/2020 10.45 -0.87 1.52 <br /> 8/15/2011 -- -- -- 11/3/2020 8.56 1.02 3.41 <br /> 10/10/2011 8.5 1.1 3.5 5/5/2021 8.9 0.68 3.07 <br /> 1/26/2012 10.3 -0.7 1.7 10/20/2021 14.27 -4.69 -2.30 <br /> 4/4/2012 9.0 0.6 3.0 5/3/2022 15.40 -5.82 -3.43 <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 /> (c)Open marker represents questionable water level, likely due to dewatering activities in the vicinity of MWR-32. <br /> EKI Environment&Water, Inc. <br /> July 2023 Page 139 of 145 EKI 1390088.03 <br />