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For the project Site, the local percolation and evapotranspiration rates are <br /> presented in Table 4. Based on the calculation shown, the estimated rate of <br /> recharge from percolating waters for the Escalon, California area would be 2.48 <br /> inches per year by this method. <br /> Table 4. Estimate of Deep Percolation of Rainfall for Escalon, CA. <br /> Average Rain- Average Potential Annual Potential <br /> Month Fall (inches) Evapotranspiration Deep Percolation of <br /> (inches) Rain (inches) <br /> January 2.50 1.24 1.26 <br /> February 1.94 1.96 None <br /> March 1.89 3.41 None <br /> April 1.12 5.10 None <br /> May 0.36 6.82 None <br /> June 0.11 7.80 None <br /> July 0.04 8.06 None <br /> August 0.07 7.13 None <br /> September 0.16 5.40 None <br /> October 0.64 3.72 None <br /> November 1.48 1.80 None <br /> December 2.15 0.93 1.22 <br /> Totals 12.46 53.37 2.48 <br /> Notes: CIMIS evapotranspiration information at wwwcimis.water.ca.gov/cimis/for ETo Zone 12. <br /> Rainfall averaged from stations Manteca, Oakdale Woodward Dam, and Modesto City County <br /> Airport. Closest available stations to Site were selected, then averaged. <br /> • Reduced Rainfall: For this method, rainfall levels from the closest rain station(s) <br /> are multiplied by a percentage based on a reasonable assumption from the <br /> literature. Because the Hantzsche and Finnemore model utilized a value of <br /> approximately 75 percent rainfall as the rate of recharge from percolating waters <br /> in the Chico area, that value is applied to local rainfall in the project area. The <br /> San Joaquin County Environmental Health Department recommended this <br /> approach in 2017, with the understanding that it would better characterize <br /> recharge within the County (personal communication with Rodney Estrada, Lead <br /> REHS, January 6, 2017). <br /> LOGE 1907 Page 12 <br />