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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-S3 <br /> Groundwater Elevation Well <br /> abandoned <br /> 00 20 <br /> 00 <br /> o z 15 <br /> �a a, <br /> ai > 10 <br /> W � <br /> *1 S '04 <br /> c� c <br /> 3 � <br /> v <br /> 3 0 <br /> o c <br /> c7 0 <br /> -5 <br /> G/ u'1 lD I� W Ql O c-I N M Lff lD I� 00 Ql O �-I NM � u'1 lD I� 00 MO r-I NM :I- uO <br /> GJ 01 01 01 01 M 0 0 0 0 0 0 0 0 0 0 1-1 .� rH r-I 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 /> MW-S3 <br /> Measuring Point NGVD 29 NAVD 88 <br /> MP 15.61 18 <br /> Groundwater Groundwater <br /> Date Sampled DTW(ft) Elevation Elevation <br /> ft,NGVD 29 ft,NAVD 88 <br /> 1/6/2005 21.44 -5.83 -3.44 <br /> 5/3/2005 16.90 -1.29 1.10 <br /> 6/16/2005 16.78 -1.17 1.22 <br /> 7/29/2005 16.58 -0.97 1.42 <br /> 11/4/2005 17.88 -2.27 0.12 <br /> 2/16/2006 17.20 -1.59 0.80 <br /> 5/9/2006 12.31 3.30 5.69 <br /> 9/11/2006 12.18 3.43 5.82 <br /> 9/29/2015 13.78 1.83 4.22 <br /> 12/7/2016 13.72 1.89 4.28 <br /> 11/29/2017 11.79 3.82 6.21 <br /> 6/20/2018 10.50 5.11 7.50 <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 143 of 145 EKI B90088.03 <br />