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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 - MWM-26 <br /> Groundwater Elevation Well <br /> 0 <br /> 20 abandoned <br /> 0 <br /> o z 15 <br /> ai a>i 10 <br /> W <br /> GJ � <br /> 3 5� <br /> v <br /> 0 <br /> o c <br /> c7 0 <br /> +� <br /> -5 <br /> 41 i11 l0 r, W Ql O -I N M u'1 lD I� 00 Ql O c-I N M � un lD I, 00 Ql O r-I N M � <br /> - 01 01 01 41 T O O O O O O O O O O <br /> co ra co co co ro co co co ca co co co ca co co co ro co co co co ra co co co ro co co co <br /> Date <br /> MWM-26 MWM-26 <br /> Measuring Point NGVD 29 NAVD 88 Measuring Point NGVD 29 NAVD 88 <br /> MP 9.04 11.43 MP 9.04 11.43 <br /> Groundwater Groundwater Groundwater Groundwater <br /> Date Sampled DTW(ft) Elevation Elevation Date Sampled DTW(ft) Elevation Elevation <br /> ft,NGVD 29 ft,NAVD 88 ft,NGVD 29 ft,NAVD 88 <br /> 5/24/2005 5.60 3.44 5.83 10/26/2011 7.17 1.87 4.26 <br /> 6/28/2005 5.23 3.81 6.20 1/25/2012 7.20 1.84 4.23 <br /> 10/12/2005 5.37 3.67 6.06 5/1/2012 7.35 1.69 4.08 <br /> 1/31/2006 6.00 3.04 5.43 7/26/2012 7.21 1.83 4.22 <br /> 4/25/2006 4.69 4.35 6.74 10/24/2012 7.70 1.34 3.73 <br /> 7/19/2006 5.41 3.63 6.02 1/30/2013 6.32 2.72 5.11 <br /> 10/13/2006 8.33 0.71 3.10 4/29/2013 6.58 2.46 4.85 <br /> 1/23/2007 11.45 -2.41 -0.02 7/31/2013 6.89 2.15 4.54 <br /> 4/24/2007 9.59 -0.55 1.84 11/20/2013 7.89 1.15 3.54 <br /> 7/24/2007 9.27 -0.23 2.16 2/3/2014 8.18 0.86 3.25 <br /> 10/30/2007 8.95 0.09 2.48 4/23/2014 7.72 1.32 3.71 <br /> 1/24/2008 8.47 0.57 2.96 8/4/2014 7.66 1.38 3.77 <br /> 4/15/2008 7.70 1.34 3.73 10/29/2014 8.00 1.04 3.43 <br /> 8/18/2008 8.52 0.52 2.91 1/29/2015 7.15 1.89 4.28 <br /> 11/25/2008 8.59 0.45 2.84 10/13/2015 8.26 0.78 3.17 <br /> 2/11/2009 8.25 0.79 3.18 <br /> 4/13/2009 7.80 1.24 3.63 <br /> 7/28/2009 8.47 0.57 2.96 <br /> 10/20/2009 8.87 0.17 2.56 <br /> 1/26/2010 8.51 0.53 2.92 <br /> 5/4/2010 7.88 1.16 3.55 <br /> 8/24/2010 7.99 1.05 3.44 <br /> 10/27/2010 7.75 1.29 3.68 <br /> 1/26/2011 7.02 2.02 4.41 <br /> 4/21/2011 6.12 2.92 5.31 <br /> 8/17/2011 6.63 2.41 4.80 <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 surveyed by MacKay&Somps,July 2005. <br /> (b)Surveyed 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 HydroFocus, Inc.Well was abandoned on 18 October 2016 per Regional Water Quality <br /> Control Board approval. <br /> EKI Environment &Water, Inc. <br /> July 2023 Page 61 of 145 EKI B90088.03 <br />