Laserfiche WebLink
Appendix B- Historical Water Levels City of Lathrop <br /> Consolidated Treatment Facility <br /> Monitoring and Reporting Program R5-2016-0028-03 Rev 3 <br /> KMW-6 <br /> Measuring Point NGVD 29 NAVD 88 <br /> MP 19.56 21.95 <br /> Groundwater Groundwater <br /> Date Sampled DTW(ft) Elevation Elevation <br /> ft,NGVD 29 ft NAVD 88 <br /> 5/8/2017 14.80 4.76 7.15 <br /> 11/28/2017 16.45 3.11 5.50 <br /> 4/25/2017 16.00 3.56 5.95 <br /> 5/2/2018 16.00 3.56 5.95 <br /> 5/31/2018 16.23 3.33 5.72 <br /> 11/5/2018 17.40 2.16 4.55 <br /> 5/1/2019 13.25 6.31 8.70 <br /> 10/31/2019 15.32 4.24 6.63 <br /> 5/12/2020 7.75 11.81 14.20 <br /> 11/4/2020 11.95 7.61 10.00 <br /> 5/3/2021 14.05 5.51 7.90 <br /> 10/19/2021 12.59 6.97 9.36 <br /> 5/2/2022 14.05 5.51 7.90 <br /> 11/8/2022 16.48 3.08 5.47 <br /> 4/3/2023 5.75 13.81 16.20 <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 79 of 145 EKI B9O088.03 <br />