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LOGE 1714: Delicato SS/NLS Addendum Page 3 <br /> July 18, 2017 <br /> Table 1: Rainfall Data Cited by Hantzsche and Finnemore, 1992 <br /> Bolinas Mesa Area Chico Area Baywood/Los Osos <br /> Average rainfall 30.9 22.5 20.0 <br /> (in/yr) <br /> Estimated rainfall 14.4 16.8 12.0 <br /> recharge (in/yr) <br /> Rainfall recharge as 46.6% 74.7% 60.0% <br /> percentage of <br /> average rainfall* <br /> *Calculated by Live Oak <br /> In these locations, the rainfall recharge is calculated to be 46.6, 60.0, and 74.7 percent of <br /> average rainfall. For the purpose of this report, Live Oak has averaged those values and <br /> selected 60 percent of rainfall to represent the estimated rainfall recharge for San Joaquin <br /> County. The San Joaquin County Environmental Health Department has confirmed that this <br /> approach should accurately characterize rainfall recharge within the County (personal <br /> communication, January 6, 2017). <br /> Rainfall data for the north Manteca area was obtained from the Western Regional Climate <br /> Center. The Stockton Metro Airport station (048558) reports the average total annual <br /> precipitation from October of 1948 through June of 2016 to be 13.76 inches. By assuming 60 <br /> percent of this precipitation percolates to the aquifer, the value of 8.26 inches average <br /> recharge of rainfall is obtained. <br /> The nitrate concentration of rainfall was estimated to be 1 mg/L-N (Hantzsche and Finnemore). <br /> Acreaa <br /> As discussed above, this analysis includes only those parcels on which the physical structure of <br /> the existing/proposed facility will be located. The following table indicates the parcels to be <br /> considered for the analysis: <br />