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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-6 <br /> Groundwater Elevation <br /> 000 20 <br /> 0 <br /> o z 15 <br /> ai iv 10 <br /> W � <br /> GJdL <br /> 3 M 5 <br /> � <br /> v <br /> 0 <br /> o c <br /> c7 0 <br /> m -5 <br /> 41 u'f lD r` W Ql O -I N M u'1 lD I� 00 Ql O -I N M � u) lD I� 00 Ql O c-I N M u'f <br /> - 01 01 01 01 01 O O O O O O O O O O <br /> co co co co co co co co co co co co co co co co co co co co co co co co co co co co co co co <br /> Date <br /> KMW-6 KMW-6 <br /> Measuring Point NGVD 29 NAVD 88 Measuring Point NGVD 29 NAVD 88 <br /> MP 19.56 21.95 MP 19.56 21.95 <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 16.67 2.89 5.28 5/3/2010 14.20 5.36 7.75 <br /> 1/24/2003 12.00 7.56 9.95 8/3/2010 13.94 5.62 8.01 <br /> 4/16/2003 16.50 3.06 5.45 10/14/2010 14.22 5.34 7.73 <br /> 9/24/2003 16.95 2.61 5.00 3/3/2011 14.32 5.24 7.63 <br /> 2/23/2004 16.52 3.04 5.43 4/20/2011 13.77 5.79 8.18 <br /> 4/19/2004 16.20 3.36 5.75 8/22/2011 12.75 6.81 9.20 <br /> 7/21/2004 14.30 5.26 7.65 10/31/2011 13.01 6.55 8.94 <br /> 12/1/2004 16.68 2.88 5.27 1/23/2012 14.97 4.59 6.98 <br /> 4/21/2005 16.52 3.04 5.43 4/26/2012 13.55 6.01 8.40 <br /> 8/18/2005 15.32 4.24 6.63 8/1/2012 14.79 4.77 7.16 <br /> 10/12/2005 15.46 4.10 6.49 10/29/2012 16.29 3.27 5.66 <br /> 1/26/2006 15.93 3.63 6.02 2/4/2013 15.99 3.57 5.96 <br /> 5/1/2006 15.43 4.13 6.52 5/6/2013 11.88 7.68 10.07 <br /> 8/15/2006 13.25 6.31 8.70 8/5/2013 15.09 4.47 6.86 <br /> 10/23/2006 13.65 5.91 8.30 11/19/2013 17.10 2.46 4.85 <br /> 1/30/2007 14.52 5.04 7.43 2/6/2014 17.32 2.24 4.63 <br /> 4/30/2007 14.46 5.10 7.49 4/28/2014 16.76 2.80 5.19 <br /> 8/2/2007 14.48 5.08 7.47 8/6/2014 16.54 3.02 5.41 <br /> 12/3/2007 15.20 4.36 6.75 11/4/2014 17.90 1.66 4.05 <br /> 2/18/2008 14.81 4.75 7.14 2/2/2015 16.71 2.85 5.24 <br /> 4/16/2008 14.37 5.19 7.58 4/27/2015 16.64 2.92 5.31 <br /> 7/15/2008 14.43 5.13 7.52 7/27/2015 15.94 3.62 6.01 <br /> 10/20/2008 15.14 4.42 6.81 8/31/2015 16.57 2.99 5.38 <br /> 1/12/2009 15.62 3.94 6.33 10/29/2015 16.46 3.10 5.49 <br /> 4/20/2009 15.86 3.70 6.09 2/4/2016 17.00 2.56 4.95 <br /> 7/27/2009 15.30 4.26 6.65 4/21/2016 15.65 3.91 6.30 <br /> 10/26/2009 14.89 4.67 7.06 8/8/2016 17.81 1.75 4.14 <br /> 2/4/2010 15.30 4.26 6.65 12/7/2016 18.29 1.27 3.66 <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 by MacKay&Somps, February 2015. <br /> (b)Surveyed 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.html) <br /> EKI Environment &Water, Inc. <br /> July 2023 Page 78 of 145 EKI B90088.03 <br />