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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-1 <br /> Groundwater Elevation Well <br /> � <br /> 20 abandoned <br /> 00 <br /> 0 <br /> o z 15 <br /> > 10 <br /> W <br /> d � <br /> 5 <br /> �a c <br /> 3 � <br /> a, <br /> 3 E 0 <br /> o e <br /> c7 � <br /> ++ <br /> -5 <br /> a� uO t.0 r� oo rn o r-i N m u'1 1.0 r� 00 rn o m � Ln � r*1 00 rn o r-i N m Ln <br /> d 01 41 01 01 01 0 0 0 0 0 0 0 0 0 0 r- r� r- r- r- r- r- r- r- r- N N N N N N <br /> co co co co co co co ro ca ra ra co ca ca co co co co co co co co co co co ro ca co ro ra co <br /> Date <br /> MWR-1 MWR-1 <br /> Measuring Point NGVD 29 NAVD 88 Measuring Point NGVD 29 NAVD 88 <br /> MID 17.01 19.40 MID 17.01 19.40 <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 13.49 3.52 5.91 8/27/2010 -- -- -- <br /> 3/2/1999 12.53 4.48 6.87 10/3/2010 13.5 3.5 5.9 <br /> 4/13/1999 12.65 4.36 6.75 1/18/2011 16.1 0.9 3.3 <br /> 3/15/2004 14.00 3.01 5.40 4/10/2011 15.4 1.6 4.0 <br /> 9/27/2004 14.47 2.54 4.93 8/15/2011 12.0 5.0 7.4 <br /> 11/15/2004 17.08 -0.07 2.32 10/10/2011 13.4 3.6 6.0 <br /> 2/24/2005 14.12 2.89 5.28 1/26/2012 -- -- -- <br /> 8/31/2005 9.24 7.77 10.16 4/4/2012 12.9 4.1 6.5 <br /> 11/30/2005 14.91 2.10 4.49 7/24/2012 13.1 3.9 6.3 <br /> 2/10/2006 13.05 3.96 6.35 10/9/2012 13.9 3.1 5.5 <br /> 4/25/2006 11.8 5.2 7.6 1/29/2013 13.2 3.8 6.2 <br /> 7/19/2006 12.8 4.2 6.6 4/2/2013 13.7 3.3 5.7 <br /> 10/13/2006 17.0 0.0 2.4 7/20/2013 13.7 3.3 5.7 <br /> 1/23/2007 17.4 -0.4 2.0 11/18/2013 15.1 2.0 4.35 <br /> 4/24/2007 15.8 1.2 3.6 1/28/2014 14.9 2.1 4.5 <br /> 7/24/2007 15.4 1.6 4.0 4/22/2014 14.5 2.5 4.9 <br /> 10/30/2007 15.8 1.2 3.6 7/31/2014 14.0 3.0 5.4 <br /> 1/24/2008 15.7 1.3 3.7 11/4/2014 14.6 2.4 4.8 <br /> 4/15/2008 15.4 1.6 4.0 <br /> 8/21/2008 15.4 1.6 4.0 <br /> 10/8/2008 15.9 1.1 3.5 <br /> 2/9/2009 16.1 0.9 3.3 <br /> 4/12/2009 16.2 0.8 3.2 <br /> 8/4/2009 15.3 1.7 4.1 <br /> 10/1/2009 15.9 1.1 3.5 <br /> 2/9/2010 16.1 0.9 3.3 <br /> 4/11/2010 15.9 1.1 3.5 <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 25 November 2014. <br /> EKI Environment &Water, Inc. <br /> July 2023 Page 103 of 145 EKI B90088.03 <br />