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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- MWR-8 <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 /> -5 <br /> 47 Lfl lD r� 00 Ql O c-I N M lf1 1.0 r� 00 Ql O -I N M L.P) lD I" 00 Ql O r-I N M Lf1 <br /> d 01 41 01 01 01 0 0 0 0 0 0 0 0 0 0 .� .� .� .� .� .� r I r I r I r I N N N N N N <br /> I I I I I I 1 I <br /> �-- C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C <br /> co co co co co co co ro ca ra ra co ca ca co co co co co co co co co co co ro ca co ro ra co <br /> Date <br /> MWR-8 MWR-8 <br /> Measuring Point NGVD 29 NAVD 88 Measuring Point NGVD 29 NAVD 88 <br /> MID 12.40 14.79 MP 12.40 14.79 <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 /> 1/26/1999 10.00 2.40 4.79 10/3/2010 8.4 4.0 6.4 <br /> 3/2/1999 8.32 4.08 6.47 1/18/2011 7.2 5.2 7.6 <br /> 4/12/1999 9.77 2.63 5.02 4/10/2011 5.9 6.5 8.9 <br /> 3/15/2004 8.82 3.58 5.97 8/15/2011 5.3 7.1 9.5 <br /> 11/15/2004 9.32 3.08 5.47 10/10/2011 7.1 5.3 7.7 <br /> 8/31/2005 6.89 5.5 7.90 1/26/2012 9.4 3.0 5.4 <br /> 11/30/2005 11.18 1.2 3.61 4/4/2012 8.5 3.9 6.3 <br /> 2/10/2006 9.27 3.13 5.52 7/24/2012 -- -- -- <br /> 4/25/2006 6.6 5.8 8.2 10/9/2012 10.06 2.34 4.73 <br /> 7/19/2006 8.5 3.9 6.3 1/29/2013 9.7 2.7 5.1 <br /> 10/13/2006 8.3 4.1 6.5 4/2/2013 10.5 1.9 4.3 <br /> 1/23/2007 9.5 2.9 5.3 7/20/2013 -- -- -- <br /> 4/24/2007 8.3 4.1 6.5 11/18/2013 11.0 1.5 3.8 <br /> 7/24/2007 8.1 4.3 6.7 1/28/2014 10.9 1.5 3.9 <br /> 10/30/2007 9.3 3.1 5.5 4/22/2014 10.3 2.1 4.5 <br /> 1/24/2008 8.2 4.2 6.6 7/31/2014 7.0 5.4 7.8 <br /> 4/15/2008 6.9 5.5 7.9 11/4/2014 10.6 1.8 4.2 <br /> 8/21/2008 6.0 6.4 8.8 1/29/2015 10.0 2.4 4.8 <br /> 10/8/2008 7.9 4.5 6.9 10/8/2015 10.45 1.95 4.34 <br /> 2/9/2009 8.7 3.7 6.1 10/27/2015 10.8 1.6 4.0 <br /> 4/12/2009 8.7 3.7 6.1 4/25/2016 10.0 2.4 4.8 <br /> 8/4/2009 5.4 7.0 9.4 11/4/2016 13.8 -1.4 1.0 <br /> 10/1/2009 8.4 4.0 6.4 12/6/2016 14.18 -1.78 0.61 <br /> 2/9/2010 7.9 4.5 6.9 5/8/2017 6.6 5.8 8.2 <br /> 4/11/2010 8.1 4.3 6.7 <br /> 8/27/2010 7.9 4.5 6.9 <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 in April/May 2004. <br /> (b)Surveyed elevations referenced to NAVD 88 and converted to NGVD 29 by subtracting 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.htmi) <br /> (c)Well destruction was coordinated by ENGEO, Inc.Well was abandoned on 20 July 2017 per Regional Water Quality Control <br /> Board approval. <br /> EKI Environment &Water, Inc. <br /> July 2023 Page 113 of 145 EKI B90088.03 <br />