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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-22 <br /> Groundwater Elevation <br /> 00 20 <br /> 00 <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 /> a� Ln �.O r, oo rn 0 -1 N m v Ln 110 r, oo rn or-1 N m :t Ln �O r, oo rn 0 -1 N mIt Ln <br /> ca co co co co ca ca ca ca co co co co ca ca ca ca co co co co co co co co co co co co co co <br /> Date <br /> MWM-22 MWM-22 <br /> Measuring Point NGVD 29 NAVD 88 Measuring Point NGVD 29 NAVD 88 <br /> MID 10.77 13.16 MID 10.77 13.16 <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 /> 1/25/2001 8.96 1.81 4.20 2/2/2004 8.37 2.40 4.79 <br /> 2/27/2001 8.12 2.65 5.04 3/2/2004 7.13 3.64 6.03 <br /> 5/31/2001 6.91 3.86 6.25 3/29/2004 7.51 3.26 5.65 <br /> 6/13/2001 6.24 4.53 6.92 3/30/2004 7.50 3.27 5.66 <br /> 10/24/2001 8.21 2.56 4.95 4/1/2004 11.59 -0.82 1.57 <br /> 11/7/2001 8.44 2.33 4.72 5/27/2004 9.29 1.48 3.87 <br /> 1/16/2002 7.38 3.39 5.78 6/30/2004 14.80 -4.03 -1.64 <br /> 1/31/2002 8.04 2.73 5.12 7/30/2004 14.17 -3.40 -1.01 <br /> 2/28/2002 8.23 2.54 4.93 8/20/2004 10.82 -0.05 2.34 <br /> 3/22/2002 8.60 2.17 4.56 9/27/2004 10.97 -0.20 2.19 <br /> 4/16/2002 7.82 2.95 5.34 10/22/2004 10.19 0.58 2.97 <br /> 4/25/2002 7.06 3.71 6.10 11/11/2004 10.43 0.34 2.73 <br /> 5/24/2002 5.94 4.83 7.22 5/25/2005 5.37 5.40 7.79 <br /> 6/28/2002 6.22 4.55 6.94 6/28/2005 6.89 3.88 6.27 <br /> 7/25/2002 7.05 3.72 6.11 10/12/2005 9.13 1.64 4.03 <br /> 8/27/2002 8.20 2.57 4.96 1/31/2006 7.25 3.52 5.91 <br /> 10/7/2002 8.68 2.09 4.48 4/25/2006 4.02 6.75 9.14 <br /> 10/29/2002 8.50 2.27 4.66 7/19/2006 6.38 4.39 6.78 <br /> 12/10/2002 9.04 1.73 4.12 10/13/2006 7.72 3.05 5.44 <br /> 1/15/2003 8.19 2.58 4.97 1/23/2007 9.69 1.08 3.47 <br /> 2/13/2003 8.48 2.29 4.68 4/24/2007 9.03 1.74 4.13 <br /> 3/18/2003 8.44 2.33 4.72 7/24/2007 8.68 2.09 4.48 <br /> 5/7/2003 7.42 3.35 5.74 10/30/2007 8.74 2.03 4.42 <br /> 6/4/2003 8.67 2.10 4.49 1/24/2008 8.78 1.99 4.38 <br /> 7/28/2003 6.81 3.96 6.35 4/15/2008 9.58 1.19 3.58 <br /> 9/8/2003 8.59 2.18 4.57 8/18/2008 9.39 1.38 3.77 <br /> 12/16/2003 9.07 1.70 4.09 11/25/2008 8.68 2.09 4.48 <br /> 1/12/2004 8.11 2.66 5.05 2/11/2009 9.12 1.65 4.04 <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 /> EKI Environment &Water, Inc. <br /> July 2023 Page 53 of 145 EKI B90088.03 <br />