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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-S1 <br /> Groundwater Elevation Well <br /> abandoned <br /> 00 20 <br /> 00 <br /> o z 15 <br /> a>i iv 10 <br /> W � <br /> d � <br /> a c <br /> 3 � <br /> a, <br /> 3 0 <br /> L.o e <br /> c7 -0 <br /> -5 <br /> a) uO ko r� oo rn o r-4 N m � Ln Qo r� 00 m o -1 N m � u'1 k.0 r� 00 rn o r-1 N m � Ln <br /> d 01 01 01 01 01 0 0 0 0 0 0 0 0 0 0 <br /> co co co co ca co co co co co co co co co co co co ra ca co co co co ro ro co co co co co ro <br /> Date <br /> MW-Si <br /> Measuring Point NGVD 29 NAVD 88 <br /> MP 18.65 21.04 <br /> Groundwater Groundwater <br /> Date Sampled DTW(ft) Elevation Elevation <br /> ft,NGVD 29 ft,NAVD 88 <br /> 1/7/2005 18.44 0.21 2.60 <br /> 5/3/2005 16.25 2.40 4.79 <br /> 6/16/2005 14.99 3.66 6.05 <br /> 7/29/2005 17.18 1.47 3.86 <br /> 11/4/2005 17.48 1.17 3.56 <br /> 2/16/2006 15.35 3.30 5.69 <br /> 5/9/2006 8.09 10.56 12.95 <br /> 9/11/2006 15.31 3.34 5.73 <br /> 9/29/2015 16.52 2.13 4.52 <br /> 12/7/2016 16.99 1.66 4.05 <br /> 11/29/2017 15.56 3.09 5.48 <br /> 6/20/2018 9.70 8.95 11.34 <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 141 of 145 EKI B90088.03 <br />