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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-5 <br /> Groundwater Elevation Well <br /> abandoned <br /> 00 20 <br /> 00 <br /> o z 15 <br /> �a a, <br /> ai ai 10 <br /> W � <br /> S <br /> o c <br /> 3 � <br /> v <br /> c E 0 <br /> `Ln 0 <br /> V <br /> +� <br /> -5 <br /> a� Ln �O r` oo rn o -1 N m � Ln � r` oo rn o N m � Ln �O r` oo rn o N m � Ln <br /> co co co co co co co co co co co co co ro ca ca ra ca ca ca ca co co co co co co co co co co <br /> Date <br /> MWR-5 MWR-5 <br /> Measuring Point NGVD 29 NAVD 88 Measuring Point NGVD 29 NAVD 88 <br /> MP 15.77 18.16 MP 15.77 18.16 <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 /> 1/26/1999 13.65 2.12 4.51 8/27/2010 11.5 4.3 6.7 <br /> 3/2/1999 12.31 3.46 5.85 10/3/2010 12.4 3.4 5.8 <br /> 4/13/1999 13.58 2.19 4.58 1/18/2011 12.5 3.3 5.7 <br /> 3/15/2004 14.66 1.11 3.50 4/10/2011 9.9 5.9 8.3 <br /> 9/27/2004 12.35 3.42 5.81 8/15/2011 10.4 5.4 7.8 <br /> 11/15/2004 15.05 0.72 3.11 10/10/2011 11.9 3.9 6.3 <br /> 2/24/2005 12.36 3.41 5.80 1/26/2012 13.6 2.2 4.6 <br /> 8/31/2005 12.77 3.00 5.39 4/4/2012 12.0 3.8 6.2 <br /> 11/29/2005 14.05 1.72 4.11 7/24/2012 11.2 4.6 7.0 <br /> 2/9/2006 13.10 2.67 5.06 10/9/2012 12.9 2.8 5.2 <br /> 4/25/2006 8.8 7.0 9.4 1/29/2013 -- -- -- <br /> 7/19/2006 10.5 5.3 7.7 4/2/2013 12.4 3.4 5.8 <br /> 10/13/2006 10.0 5.8 8.2 7/20/2013 10.6 5.2 7.5 <br /> 1/23/2007 12.7 3.1 5.5 11/18/2013 13.90 1.87 4.26 <br /> 4/24/2007 13.6 2.2 4.6 1/28/2014 14.1 1.7 4.1 <br /> 7/24/2007 11.6 4.2 6.6 4/22/2014 13.9 1.9 4.3 <br /> 10/30/2007 13.4 2.4 4.8 7/31/2014 11.3 4.5 6.9 <br /> 1/24/2008 13.7 2.1 4.5 11/4/2014 13.3 2.5 4.9 <br /> 4/15/2008 -- -- -- 1/29/2015 12.7 3.1 5.5 <br /> 8/21/2008 -- -- -- 10/8/2015 13.36 2.41 4.80 <br /> 10/8/2008 -- -- -- 10/27/2015 13.9 1.9 4.3 <br /> 2/9/2009 13.7 2.1 4.5 4/25/2016 13.5 2.3 4.7 <br /> 4/12/2009 13.6 2.2 4.6 11/4/2016 13.8 2.0 4.4 <br /> 8/4/2009 11.6 4.2 6.6 12/6/2016 14.58 1.19 3.58 <br /> 10/1/2009 12.8 3.0 5.4 5/8/2017 9.3 6.5 8.9 <br /> 2/9/2010 12.8 3.0 5.4 11/30/2017 14.60 1.17 3.56 <br /> 4/11/2010 12.9 2.9 5.3 5/4/2018 14.3 1.5 3.9 <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 in April/May 2004. <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)Well destruction was coordinated by ENGEO, Inc.Well was abandoned on 6 September 2018,and replaced by well MWR-5R. <br /> EKI Environment &Water, Inc. <br /> July 2023 Page 109 of 145 EKI B90088.03 <br />