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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 - North of CLSP MW-N4 <br /> Groundwater Elevation <br /> 000 20 <br /> 0 <br /> o z 15 <br /> ai iv 10 <br /> W <br /> GJ � <br /> 5 <br /> 3 <br /> v <br /> 0 <br /> c7o c <br /> u0 <br /> m -5 <br /> 41 u'f lD r� W Ql O -I N M �t u'1 lD r, 00 Ql O -I N M � u) lD I� 00 Ql O c-I N M � u'f <br /> GJ 01 01 01 T T O O O O O O O O O O r- r- 1- 1- 1- 1- 1- 1- <br /> co co co co co co co co co co co co co co co co co co co co co co co co co co co co co co co <br /> Date <br /> MW-N4 <br /> Measuring Point NGVD 29 NAVD 88 <br /> MP 12.06 14.45 <br /> Groundwater Groundwater <br /> Date Sampled DTW(ft) Elevation Elevation <br /> ft,NGVD 29 ft,NAVD 88 <br /> 1/11/2005 10.72 1.34 3.73 <br /> 5/4/2005 8.53 3.53 5.92 <br /> 6/16/2005 8.66 3.40 5.79 <br /> 8/2/2005 8.98 3.08 5.47 <br /> 11/4/2005 10.49 1.57 3.96 <br /> 2/16/2006 9.06 3.00 5.39 <br /> 5/9/2006 5.58 6.48 8.87 <br /> 9/11/2006 10.95 1.11 3.50 <br /> 9/30/2015 10.58 1.48 3.87 <br /> 12/7/2016 10.80 1.26 3.65 <br /> 11/29/2017 10.63 1.43 3.82 <br /> Abbreviations: <br /> CLSP=Central Lathrop Specific Plan <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 /> EKI Environment &Water, Inc. <br /> July 2023 Page 4 of 145 EKI B90088.03 <br />