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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 - MBRMW-3 <br /> Groundwater Elevation <br /> 000 20 <br /> 0 <br /> o z 15 <br /> ai 10 <br /> W <br /> GJ � <br /> 5 <br /> 3 C <br /> v <br /> 0 <br /> o c <br /> c7 0 <br /> m -5 <br /> 41 u'f lD r` W Ql O r-I N M u'1 lD I� 00 Ql O -I N M � uO lD I� 00 Ql O c-I N M � u'f <br /> GJ 01 01 01 T T O O O O O O O O O O r- r- 1- 1- 1- 1- 1- 1- <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 /> MBRMW-3 MBRMW-3 <br /> Measuring Point NGVD 29 NAVD 88 Measuring Point NGVD 29 NAVD 88 <br /> MP 12.15 14.54 MP 12.15 14.54 <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 /> 5/26/2005 13.00 -0.85 1.54 4/25/2012 7.76 4.39 6.78 <br /> 6/28/2005 13.55 -1.40 0.99 7/31/2012 9.44 2.71 5.10 <br /> 10/12/2005 12.93 -0.78 1.61 11/8/2012 9.95 2.20 4.59 <br /> 1/31/2006 11.44 0.71 3.10 2/1/2013 8.29 3.86 6.25 <br /> 4/25/2006 10.02 2.13 4.52 5/3/2013 8.50 3.65 6.04 <br /> 7/19/2006 10.32 1.83 4.22 8/6/2013 9.91 2.24 4.63 <br /> 10/13/2006 10.49 1.66 4.05 11/22/2013 10.18 1.97 4.36 <br /> 1/23/2007 9.69 2.46 4.85 2/7/2014 10.12 2.03 4.42 <br /> 4/24/2007 9.61 2.54 4.93 4/25/2014 9.75 2.40 4.79 <br /> 7/24/2007 10.11 2.04 4.43 8/1/2014 10.52 1.63 4.02 <br /> 10/30/2007 10.89 1.26 3.65 11/5/2014 10.78 1.37 3.76 <br /> 1/24/2008 8.60 3.55 5.94 2/3/2015 9.26 2.89 5.28 <br /> 4/15/2008 8.84 3.31 5.70 4/27/2015 9.50 2.65 5.04 <br /> 8/22/2008 9.61 2.54 4.93 10/21/2015 10.77 1.38 3.77 <br /> 11/19/2008 9.38 2.77 5.16 10/28/2015 10.75 1.40 3.79 <br /> 2/9/2009 8.75 3.40 5.79 4/25/2016 9.31 2.84 5.23 <br /> 4/16/2009 8.70 3.45 5.84 8/5/2016 10.02 2.13 4.52 <br /> 7/27/2009 9.67 2.48 4.87 12/7/2016 10.02 2.13 4.52 <br /> 10/19/2009 9.50 2.65 5.04 5/9/2017 11.54 0.61 3.00 <br /> 1/25/2010 8.12 4.03 6.42 11/28/2017 10.50 1.65 4.04 <br /> 4/21/2010 7.24 4.91 7.30 4/25/2018 13.92 -1.77 0.62 <br /> 8/23/2010 9.00 3.15 5.54 5/3/2018 9.36 2.79 5.18 <br /> 10/27/2010 8.82 3.33 5.72 11/5/2018 10.89 1.26 3.65 <br /> 1/19/2011 7.01 5.14 7.53 5/1/2019 9.36 2.79 5.18 <br /> 4/19/2011 6.41 5.74 8.13 10/31/2019 9.38 2.77 5.16 <br /> 8/16/2011 8.02 4.13 6.52 5/8/2020 8.08 4.07 6.46 <br /> 11/1/2011 8.37 3.78 6.17 11/4/2020 9.63 2.52 4.91 <br /> 1/25/2012 7.78 4.37 6.76 5/7/2021 9.31 2.84 5.23 <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 67 of 145 EKI B90088.03 <br />