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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-S2 <br /> Groundwater Elevation Well <br /> � <br /> 20 abandoned <br /> 00 <br /> 0 <br /> o z 15 <br /> > 10 <br /> W <br /> d � <br /> 5 <br /> a c <br /> 3 � <br /> a, <br /> 3 0 <br /> o e <br /> c7 0 <br /> ++ <br /> -5 <br /> a� uO � r, oo rn o -1 N m � Ln �o r, 00 m o r-i N m It u'1 k.0 r, 00 rn o -1 N m � Ln <br /> - 01 01 01 T T 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-S2 <br /> Measuring Point NGVD 29 NAVD 88 <br /> MP 14.75 17.14 <br /> Groundwater Groundwater <br /> Date Sampled DTW(ft) Elevation Elevation <br /> ft,NGVD 29 ft,NAVD 88 <br /> 1/6/2005 18.82 -4.07 -1.68 <br /> 5/3/2005 18.25 -3.50 -1.11 <br /> 6/16/2005 17.00 -2.25 0.14 <br /> 7/29/2005 15.50 -0.75 1.64 <br /> 11/4/2005 16.74 -1.99 0.40 <br /> 2/16/2006 16.55 -1.80 0.59 <br /> 5/9/2006 13.82 0.93 3.32 <br /> 9/11/2006 12.82 1.93 4.32 <br /> 9/29/2015 14.52 0.23 2.62 <br /> 12/7/2016 13.07 1.68 4.07 <br /> 11/29/2017 11.53 3.22 5.61 <br /> 6/20/2018 8.25 6.50 8.89 <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 142 of 145 EKI B90088.03 <br />