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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-2 <br /> Groundwater Elevation <br /> 00 20 <br /> 00 <br /> o z 15 <br /> 10 <br /> W <br /> d � <br /> 5 <br /> a c <br /> 3 � <br /> a, <br /> 3 0 <br /> o e <br /> c7 0 <br /> -5 <br /> a� Ln �.O r, oo rn or-i N m v Ln 110 r, oo rn or-1 N m :t Ln �O r, oo rn 0 -1 N mIt Ln <br /> d 01 01 01 T T O O O <br /> ca co co co co ca ca ca ca co co co co ca ca ca ca co co co co co co co co co co co co co co <br /> Date <br /> KMW-2 KMW-2 <br /> Measuring Point NGVD 29 NAVD 88 Measuring Point NGVD 29 NAVD 88 <br /> MP 13.86 16.25 MP 13.86 16.25 <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 /> 1/30/2001 12.43 1.43 3.82 2/5/2010 10.95 2.91 5.30 <br /> 10/11/2002 14.25 -0.39 2.00 5/3/2010 10.38 3.48 5.87 <br /> 1/24/2003 17.25 -3.39 -1.00 8/3/2010 11.21 2.65 5.04 <br /> 4/16/2003 13.50 0.36 2.75 10/14/2010 12.05 1.81 4.20 <br /> 9/24/2003 15.20 -1.34 1.05 3/3/2011 9.90 3.96 6.35 <br /> 2/19/2004 13.48 0.38 2.77 4/20/2011 10.09 3.77 6.16 <br /> 4/19/2004 13.92 -0.06 2.33 8/22/2011 10.76 3.10 5.49 <br /> 7/21/2004 15.20 -1.34 1.05 10/31/2011 10.87 2.99 5.38 <br /> 12/2/2004 15.33 -1.47 0.92 1/23/2012 10.31 3.55 5.94 <br /> 4/21/2005 13.78 0.08 2.47 4/26/2012 10.26 3.60 5.99 <br /> 8/18/2005 15.74 -1.88 0.51 8/1/2012 12.02 1.84 4.23 <br /> 10/12/2005 14.85 -0.99 1.40 10/29/2012 12.50 1.36 3.75 <br /> 1/26/2006 13.35 0.51 2.90 2/4/2013 11.20 2.66 5.05 <br /> 5/1/2006 11.92 1.94 4.33 5/6/2013 11.49 2.37 4.76 <br /> 8/15/2006 13.15 0.71 3.10 8/5/2013 12.49 1.37 3.76 <br /> 10/23/2006 12.93 0.93 3.32 11/19/2013 12.96 0.90 3.29 <br /> 1/30/2007 11.86 2.00 4.39 2/6/2014 12.87 0.99 3.38 <br /> 4/30/2007 12.24 1.62 4.01 4/28/2014 12.29 1.57 3.96 <br /> 8/2/2007 13.50 0.36 2.75 8/6/2014 13.43 0.43 2.82 <br /> 12/3/2007 12.90 0.96 3.35 11/4/2014 12.51 1.35 3.74 <br /> 2/18/2008 11.38 2.48 4.87 2/2/2015 12.21 1.65 4.04 <br /> 4/16/2008 11.82 2.04 4.43 4/27/2015 12.45 1.41 3.80 <br /> 7/15/2008 12.55 1.31 3.70 7/27/2015 13.25 0.61 3.00 <br /> 10/20/2008 12.75 1.11 3.50 8/31/2015 13.55 0.31 2.70 <br /> 1/12/2009 12.23 1.63 4.02 10/29/2015 13.65 0.21 2.60 <br /> 4/20/2009 11.84 2.02 4.41 2/4/2016 12.05 1.81 4.20 <br /> 7/27/2009 12.30 1.56 3.95 4/21/2016 11.85 2.01 4.40 <br /> 10/26/2009 12.00 1.86 4.25 8/8/2016 13.35 0.51 2.90 <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 72 of 145 EKI B90088.03 <br />