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TABLE 5 <br /> VERTICAL HYDRAULIC GROUNDWATER GRADIENTS <br /> 26700 South Banta Road <br /> Tracy,California <br /> Top of Current Vertical Hydraulic Gradient(ft/ft) Previous Vertical Hydraulic Gradient(ft/ft) <br /> Screen Bottom of <br /> Elevation Screen Groundwater <br /> Monitoring (feet- Elevation Elevation (feet <br /> Well Horizon datum) (feet-datum) datum) March 2023 March 2021 March 2019 September 2017 <br /> MW-9 Upper 60.31 45.31 47.84 3/17/2023 <br /> down 0.014 down 0.019 down 0.028 down 0.037 <br /> MW-10 Middle 27.25 17.25 47.42 3/17/2023 <br /> MW-11 Upper 51.63 36.63 44.98 3/17/2023 <br /> up 0.006 down 0.008 down 0.006 up 0.004 <br /> MW-12 Middle 24.08 14.08 45.13 3/17/2023 <br /> MW-13 Upper 39.91 29.91 46.97 3/17/2023 down 0.224 up 0.004 down 0.006 up 0.008 <br /> MW-14 Middle 15.01 5.01 41.39 3/17/2023 <br /> down 0.032 up 0.011 down 0.002 up 0.002 <br /> MW-15 Lower -5 -15 40.74 3/17/2023 <br /> Abbreviations <br /> Feet-datum=feet relative to site datum(NAVD88 datum) <br /> NAVD88=North American Vertical Datum 1988 <br /> https://woodplc,sharepoint.com/teams/olintracy/shared documents/general/03.0 docctrl/2021 biennial report/01_text/tcy 2021 biennial_text_rev.docx Pagel of 1 <br />