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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-7 <br /> Groundwater Elevation Well <br /> � <br /> 20 abandoned <br /> 0 <br /> 0 <br /> o z 15 <br /> ai (U 10 <br /> W <br /> GJ � <br /> 3 5� <br /> v <br /> 0 <br /> o c <br /> c7 0 <br /> M -S <br /> +� <br /> 41 111 1.0 I-1 00 Ql O c-I N M � u'f l0 I� W Ql O c-I N M � L!1 l0 I*1 00 Ql O L.f) <br /> W. 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-7 MWR-7 <br /> Measuring Point NGVD 29 NAVD 88 Measuring Point NGVD 29 NAVD 88 <br /> MP 14.59 16.98 MP 14.59 16.98 <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 12.17 2.42 4.81 8/15/2011 10.4 4.2 6.6 <br /> 3/2/1999 10.75 3.84 6.23 10/10/2011 11.5 3.1 5.5 <br /> 4/12/1999 11.85 2.74 5.13 1/26/2012 -- -- -- <br /> 11/30/2005 13.39 1.20 3.59 4/4/2012 11.9 2.7 5.1 <br /> 2/10/2006 11.61 2.98 5.37 7/24/2012 10.2 4.4 6.8 <br /> 4/25/2006 6.0 8.6 11.0 10/9/2012 11.9 2.7 5.1 <br /> 7/19/2006 9.9 4.7 7.1 1/29/2013 11.6 3.0 5.4 <br /> 10/13/2006 11.8 2.8 5.2 4/2/2013 11.5 3.1 5.5 <br /> 1/23/2007 12.3 2.3 4.7 7/20/2013 9.2 5.4 7.8 <br /> 4/24/2007 12.5 2.1 4.5 11/18/2013 12.80 1.79 4.18 <br /> 7/24/2007 9.5 5.1 7.5 1/28/2014 13.0 1.6 4.0 <br /> 10/30/2007 13.0 1.6 4.0 4/22/2014 12.4 2.2 4.6 <br /> 1/24/2008 12.3 2.3 4.7 7/31/2014 10.1 4.5 6.9 <br /> 4/15/2008 8.6 6.0 8.4 11/4/2014 12.6 2.0 4.4 <br /> 8/21/2008 11.1 3.5 5.9 1/29/2015 11.5 3.1 5.5 <br /> 10/8/2008 12.0 2.6 5.0 10/8/2015 12.82 1.77 4.16 <br /> 2/9/2009 12.9 1.7 4.1 10/27/2015 13.3 1.3 3.7 <br /> 4/12/2009 12.8 1.8 4.2 4/26/2016 12.6 2.0 4.4 <br /> 8/4/2009 9.6 5.0 7.4 <br /> 10/1/2009 11.3 3.3 5.7 <br /> 2/9/2010 11.5 3.1 5.5 <br /> 4/11/2010 11.7 2.9 5.3 <br /> 8/27/2010 11.4 3.2 5.6 <br /> 10/3/2010 11.8 2.8 5.2 <br /> 1/18/2011 11.3 3.3 5.7 <br /> 4/10/2011 10.2 4.4 6.8 <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 112 of 145 EKI B90088.03 <br />