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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-6 <br /> Groundwater Elevation Well <br /> � <br /> 20 abandoned <br /> 0 <br /> 0 <br /> o z 15 <br /> ai a>i 10 <br /> W � <br /> GJIL <br /> o c <br /> 5 <br /> 3 � <br /> v <br /> � E 0 <br /> o c <br /> c7 � <br /> m -5 <br /> +� <br /> 41 L(1 l0 I, 00 Ql O c-I N M It u'f lD r, W Ql O c-I N M � L!1 1.0 I, 00 Ql O M � L.f) <br /> - 01 01 01 T T 0 0 0 0 0 0 0 0 0 0 N N N N N N <br /> co ro co ra ra co co ca co co co co co co co co co co co ro ca ca ro ra ca co co co co co co <br /> Date <br /> MWR-6 MWR-6 <br /> Measuring Point NGVD 29 NAVD 88 Measuring Point NGVD 29 NAVD 88 <br /> MP 13.78 16.17 MID 13.78 16.17 <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 11.05 2.73 5.12 4/11/2010 11.1 2.7 5.1 <br /> 3/2/1999 9.50 4.28 6.67 8/27/2010 -- -- -- <br /> 4/12/1999 10.44 3.34 5.73 10/3/2010 11.6 2.2 4.6 <br /> 3/15/2004 10.64 3.14 5.53 1/18/2011 -- -- -- <br /> 9/27/2004 10.81 2.97 5.36 4/10/2011 8.6 5.2 7.6 <br /> 11/15/2004 10.97 2.81 5.20 8/15/2011 -- -- -- <br /> 2/24/2005 9.39 4.39 6.78 10/10/2011 11.1 2.7 5.1 <br /> 8/31/2005 9.27 4.51 6.90 1/26/2012 12.2 1.6 4.0 <br /> 11/30/2005 11.88 1.90 4.29 4/4/2012 11.2 2.6 5.0 <br /> 2/9/2006 10.22 3.56 5.95 7/24/2012 10.5 3.2 5.6 <br /> 4/25/2006 12.8 1.0 3.4 10/9/2012 11.6 2.2 4.6 <br /> 7/19/2006 8.8 5.0 7.4 1/29/2013 10.8 3.0 5.4 <br /> 10/13/2006 10.5 3.3 5.7 4/2/2013 10.0 3.7 6.1 <br /> 1/23/2007 10.8 3.0 5.4 7/20/2013 10.2 3.6 6.0 <br /> 4/24/2007 11.7 2.1 4.5 11/18/2013 11.8 2.0 4.42 <br /> 7/24/2007 9.8 4.0 6.4 1/28/2014 12.0 1.8 4.2 <br /> 10/30/2007 12.2 1.6 4.0 4/22/2014 11.5 2.3 4.7 <br /> 1/24/2008 11.7 2.1 4.5 7/31/2014 10.0 3.8 6.2 <br /> 4/15/2008 10.4 3.4 5.8 11/4/2014 11.5 2.3 4.7 <br /> 8/21/2008 11.6 2.2 4.6 1/29/2015 10.1 3.7 6.1 <br /> 10/8/2008 12.0 1.8 4.2 10/13/2015 12.35 1.43 3.82 <br /> 2/9/2009 12.1 1.7 4.1 10/27/2015 12.8 1.0 3.4 <br /> 4/12/2009 12.1 1.7 4.1 4/26/2016 12.0 1.8 4.2 <br /> 8/4/2009 9.5 4.3 6.7 <br /> 10/1/2009 10.3 3.5 5.9 <br /> 2/9/2010 -- -- -- <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 2 June 2016 per Regional Water Quality Control <br /> Board approval. <br /> EKI Environment&Water, Inc. <br /> July 2023 Page 111 of 145 EKI B90088.03 <br />