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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 - KMW-7 <br /> Groundwater Elevation Well <br /> � <br /> 20 abandoned <br /> 00 <br /> 0 <br /> o z 15 <br /> 10 <br /> W <br /> d � <br /> a c <br /> 3 � <br /> a, <br /> 3 0 <br /> C7o e <br /> -0 <br /> -5 <br /> 47 Lfl lD r� 00 Ql O c-I N M lf1 1.0 r� 00 Ql O -I N M L.P) lD I" 00 Ql O r-I N M Lf1 <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 /> KMW-7 KMW-7 <br /> Measuring Point NGVD 29 NAVD 88 Measuring Point NGVD 29 NAVD 88 <br /> M P 19.06 21.45 M P 19.06 21.45 <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 /> 10/11/2002 16.42 2.64 5.03 7/27/2009 13.87 5.19 7.58 <br /> 1/24/2003 12.00 7.06 9.45 10/26/2009 13.94 5.12 7.51 <br /> 4/16/2003 15.75 3.31 5.70 2/5/2010 13.10 5.96 8.35 <br /> 9/24/2003 17.21 1.85 4.24 5/3/2010 12.92 6.14 8.53 <br /> 2/17/2004 16.00 3.06 5.45 8/3/2010 12.78 6.28 8.67 <br /> 4/19/2004 15.90 3.16 5.55 10/14/2010 13.96 5.10 7.49 <br /> 7/21/2004 17.12 1.94 4.33 3/3/2011 12.36 6.70 9.09 <br /> 12/2/2004 17.58 1.48 3.87 4/20/2011 12.26 6.80 9.19 <br /> 4/21/2005 15.9 3.16 5.55 8/22/2011 12.79 6.27 8.66 <br /> 8/18/2005 7.55 11.51 13.90 10/31/2011 13.21 5.85 8.24 <br /> 10/12/2005 17.20 1.86 4.25 1/23/2012 12.91 6.15 8.54 <br /> 1/26/2006 15.95 3.11 5.50 4/26/2012 12.84 6.22 8.61 <br /> 5/1/2006 14.68 4.38 6.77 8/6/2012 14.26 4.80 7.19 <br /> 8/15/2006 15.19 3.87 6.26 10/29/2012 14.70 4.36 6.75 <br /> 10/23/2006 15.20 3.86 6.25 2/4/2013 12.76 6.30 8.69 <br /> 1/30/2007 14.17 4.89 7.28 5/6/2013 13.15 5.91 8.30 <br /> 5/29/2007 13.35 5.71 8.10 8/5/2013 14.07 4.99 7.38 <br /> 8/2/2007 14.20 4.86 7.25 11/19/2013 14.95 4.11 6.50 <br /> 12/3/2007 14.57 4.49 6.88 2/6/2014 14.97 4.09 6.48 <br /> 2/18/2008 12.96 6.10 8.49 4/28/2014 13.42 5.64 8.03 <br /> 4/16/2008 13.30 5.76 8.15 8/6/2014 14.59 4.47 6.86 <br /> 7/15/2008 13.89 5.17 7.56 <br /> 10/20/2008 14.22 4.84 7.23 <br /> 1/12/2009 13.84 5.22 7.61 <br /> 4/20/2009 13.66 5.40 7.79 <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)The reported MP elevation is thought to be incorrect,and may reference the wrong datum.The reported MP elevation could not <br /> be verified prior to well abandonment. <br /> (b) Reported MP elevations referenced to NGVD 29 and converted to NAVD 88 by adding 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.htmi) <br /> (c)Well destruction was coordinated by HydroFocus, Inc.Well was abandoned on 24 October 2014 per Regional Water Quality <br /> Control Board approval. <br /> EKI Environment &Water, Inc. <br /> July 2023 Page 81 of 145 EKI B90088.03 <br />