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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 - MW-5 <br /> Groundwater Elevation <br /> 00 20 <br /> 00 <br /> o z 15 <br /> �a a, <br /> ai 10 <br /> W � <br /> "' <br /> o 5 c <br /> 3 � <br /> v <br /> 3 0 <br /> o c <br /> c7 0 <br /> 4 <br /> -5 <br /> 1 <br /> G/ Ln 1.0 r� W M O c I N M � M l0 r� W M O ri N M � Ln l0 r� W M O r-I N M � Ln <br /> GJ Ol Ol Ol Ol Ol 0 0 0 0 0 0 0 0 0 0 c-I c-I c-I c-I c-I c-I c-I c-I c-I c-I N N N N N N <br /> co co co co co co co co co co co co ro ro ro ro ro ro ro ra ca ca ca ca co co co ca ca ra ra <br /> Date <br /> MW-5 MW-5 <br /> Measuring Point NGVD 29 NAVD 88 Measuring Point NGVD 29 NAVD 88 <br /> MP 10.56 12.95 MID 10.56 12.95 <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 /> 5/27/1998 8.5 2.06 4.45 3/16/2000 9.6 0.96 3.35 <br /> 6/5/1998 8.8 1.76 4.15 5/3/2000 10.1 0.46 2.85 <br /> 6/12/1998 9.1 1.46 3.85 6/12/2000 11.4 -0.84 1.55 <br /> 6/17/1998 9.5 1.06 3.45 7/6/2000 11.8 -1.24 1.15 <br /> 6/24/1998 9.8 0.76 3.15 8/12/2000 12.3 -1.74 0.65 <br /> 7/1/1998 9.9 0.66 3.05 10/3/2000 12.3 -1.74 0.65 <br /> 7/8/1998 10.3 0.26 2.65 11/21/2000 11.3 -0.74 1.65 <br /> 7/22/1998 10.5 0.06 2.45 12/5/2000 10.9 -0.34 2.05 <br /> 8/5/1998 10.8 -0.24 2.15 1/3/2001 11.3 -0.74 1.65 <br /> 8/26/1998 11.4 -0.84 1.55 2/6/2001 10.7 -0.14 2.25 <br /> 9/10/1998 11.4 -0.84 1.55 3/6/2001 10.4 0.16 2.55 <br /> 9/22/1998 11.3 -0.74 1.65 4/3/2001 11.0 -0.44 1.95 <br /> 10/7/1998 11.2 -0.64 1.75 5/2/2001 11.2 -0.64 1.75 <br /> 10/21/1998 11.3 -0.74 1.65 6/7/2001 11.9 -1.34 1.05 <br /> 11/4/1998 10.9 -0.34 2.05 10/11/2002 12.0 -1.44 0.95 <br /> 11/19/1998 11.0 -0.44 1.95 1/24/2003 10.0 0.56 2.95 <br /> 12/2/1998 10.7 -0.14 2.25 4/16/2003 9.33 1.23 3.62 <br /> 12/16/1998 10.6 -0.04 2.35 9/24/2003 12.20 -1.64 0.75 <br /> 1/6/1999 10.5 0.06 2.45 2/19/2004 10.24 0.32 2.71 <br /> 2/3/1999 10.0 0.56 2.95 4/24/2004 11.31 -0.75 1.64 <br /> 3/17/1999 9.6 0.96 3.35 7/29/2004 12.75 -2.19 0.20 <br /> 3/31/1999 9.4 1.16 3.55 12/2/2004 13.09 -2.53 -0.14 <br /> 5/31/1999 10.3 0.26 2.65 4/21/2005 11.95 -1.39 1.00 <br /> 7/7/1999 11.3 -0.74 1.65 8/18/2005 13.20 -2.64 -0.25 <br /> 8/4/1999 12.0 -1.44 0.95 10/12/2005 12.40 -1.84 0.55 <br /> 9/15/1999 12.6 -2.04 0.35 1/26/2006 11.38 -0.82 1.57 <br /> 10/20/1999 12.0 -1.44 0.95 5/1/2006 10.43 0.13 2.52 <br /> 12/28/1999 11.1 -0.54 1.85 8/15/2006 11.10 -0.54 1.85 <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, February 2015. <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 91 of 145 EKI B90088.03 <br />