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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 - South of Mossdale MW-S4 <br /> Groundwater Elevation Well <br /> 00 <br /> 20 abandoned <br /> 0 <br /> o z 15 <br /> ai 10 <br /> W � <br /> o c <br /> 3 � <br /> v <br /> 3 0 <br /> o c <br /> c7 M <br /> m -5 <br /> 41 <br /> G/ Ln lD r� 00 Ql O r-I fV M �t Ln 1.0 I" 00 Ql O r-I N M � Ln lD r� 00 M O r-I N M �t Ln <br /> GJ Ol Ol Ol Ol T 0 0 0 0 0 0 0 0 0 0 rI cI cI cI cI cI cI cI cI cI N N N N N N <br /> co co co co co ro ra ca co co co co ca ra ca co co co co co ca co co co co co ca co co co co <br /> Date <br /> M W-S4 <br /> Measuring Point NGVD 29 NAVD 88 <br /> M P 15.98 18.37 <br /> Groundwater Groundwater <br /> Date Sampled DTW(ft) Elevation Elevation <br /> ft,NGVD 29 ft,NAVD 88 <br /> 1/6/2005 19.34 -3.36 -0.97 <br /> 5/3/2005 19.98 -4.00 -1.61 <br /> 6/16/2005 18.84 -2.86 -0.47 <br /> 7/29/2005 20.74 -4.76 -2.37 <br /> 11/4/2005 20.38 -4.40 -2.01 <br /> 2/16/2006 17.82 -1.84 0.55 <br /> 5/9/2006 7.91 8.07 10.46 <br /> 9/11/2006 12.85 3.13 5.52 <br /> 9/29/2015 13.78 2.20 4.59 <br /> 12/7/2016 14.60 1.38 3.77 <br /> 11/29/2017 12.94 3.04 5.43 <br /> 6/20/2018 9.80 6.18 8.57 <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 reported by ENGEO, Inc.,January 2005. <br /> (b) Reported 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 /> (c)Well destruction was coordinated by ENGEO, Inc.Well was abandoned on 20 June 2018. <br /> EKI Environment &Water, Inc. <br /> July 2023 Page 144 of 145 EKI B90088.03 <br />