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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 - MWM-17 <br /> Groundwater Elevation <br /> 00 20 <br /> 00 <br /> o z 15 <br /> �a a, <br /> ai ai 10 <br /> W � <br /> 4J � <br /> "' <br /> o 5 c <br /> 3 � <br /> v <br /> 3 0 <br /> o c <br /> c7 0 <br /> 4 <br /> -5 <br /> 1 <br /> G/ Ln 1.0 r� 00 M O r-I N M � M l0 r� W M O r-I N M � Ln l0 r� W M O r-I N M � Ln <br /> OJ 01 Ol Ol T T 0 0 0 0 0 0 0 0 0 0 1- 1- 1- 1- 1- 1- 1- 1- 1- 1- N N N N N N <br /> co co co co co co co co co co co co ro ro ro ro ro ro ro ra ca ca ca ca co co co ca ca ra ra <br /> Date <br /> MWM-17 MWM-17 <br /> Measuring Point NGVD 29 NAVD 88 Measuring Point NGVD 29 NAVD 88 <br /> MP 9.88 12.27 MID 9.88 12.27 <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 /> 5/24/2005 8.89 0.99 3.38 5/1/2012 7.45 2.43 4.82 <br /> 6/28/2005 8.50 1.38 3.77 7/27/2012 7.63 2.25 4.64 <br /> 10/12/2005 8.40 1.48 3.87 10/24/2012 7.70 2.18 4.57 <br /> 1/31/2006 7.67 2.21 4.60 1/30/2013 7.37 2.51 4.90 <br /> 4/25/2006 6.48 3.40 5.79 4/29/2013 7.48 2.40 4.79 <br /> 7/19/2006 6.64 3.24 5.63 8/1/2013 6.89 2.99 5.38 <br /> 10/13/2006 8.58 1.30 3.69 11/20/2013 8.18 1.70 4.09 <br /> 1/23/2007 8.58 1.30 3.69 2/3/2014 8.35 1.53 3.92 <br /> 4/24/2007 8.04 1.84 4.23 4/23/2014 7.95 1.93 4.32 <br /> 7/24/2007 7.54 2.34 4.73 8/4/2014 8.36 1.52 3.91 <br /> 10/30/2007 8.15 1.73 4.12 10/29/2014 8.60 1.28 3.67 <br /> 1/24/2008 7.05 2.83 5.22 1/29/2015 7.70 2.18 4.57 <br /> 4/15/2008 7.80 2.08 4.47 10/22/2015 9.27 0.61 3.00 <br /> 8/19/2008 8.04 1.84 4.23 10/27/2015 9.30 0.58 2.97 <br /> 11/20/2008 8.22 1.66 4.05 4/22/2016 7.48 2.40 4.79 <br /> 2/17/2009 7.19 2.69 5.08 11/1/2016 8.35 1.53 3.92 <br /> 4/14/2009 7.71 2.17 4.56 12/9/2016 8.31 1.57 3.96 <br /> 7/30/2009 7.89 1.99 4.38 5/4/2017 6.55 3.33 5.72 <br /> 10/21/2009 7.80 2.08 4.47 11/27/2017 7.60 2.28 4.67 <br /> 1/27/2010 7.34 2.54 4.93 5/4/2018 7.55 2.33 4.72 <br /> 5/6/2010 7.34 2.54 4.93 11/6/2018 9.12 0.76 3.15 <br /> 8/25/2010 7.94 1.94 4.33 4/29/2019 7.16 2.72 5.11 <br /> 10/28/2010 7.35 2.53 4.92 11/1/2019 8.34 1.54 3.93 <br /> 1/27/2011 7.12 2.76 5.15 5/6/2020 8.06 1.82 4.21 <br /> 4/26/2011 6.79 3.09 5.48 11/5/2020 8.87 1.01 3.40 <br /> 8/19/2011 7.18 2.70 5.09 5/3/2021 8.35 1.53 3.92 <br /> 10/26/2011 7.31 2.57 4.96 10/18/2021 9.18 0.70 3.09 <br /> 1/24/2012 7.52 2.36 4.75 4/29/2022 8.88 1.00 3.39 <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,July 2005. <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 44 of 145 EKI B90088.03 <br />