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However, due to the proximity of the Delta, this volume of fresh water has a profound dilution <br />effect on the underlying groundwater. This was observed in studies conducted on the dairy <br />adjacent to the south of the subject property. <br />NLS§ 2.3, SSS§ 4.3, 4.4, 4.5. As referenced, the domestic water from the well that will serve <br />the residential structures is non-operational and could not be sampled for the typical constituents <br />of concern that are required by the EHD. <br />E. Climatic Data: Rainfall versus Evapotranspiration <br />NLS§ 3.2. The following Table illustrates rainfall and evapotranspiration for the Tracy area. <br />Precipitation data was obtained from the Soil Survey of San Joaquin County. The conservative "2 <br />years in 10" data was used and not the "average rainfall" data. Evapotranspiration data was <br />obtained from the California Irrigation Management Information System (CIMIS): <br />TABLE 3 <br />PRECIPITATION AND Eto <br />7 <br />DATA FOR TRACY, CA <br />Month 2 Years in 10 will have more <br />precipitation than: (in/mo) <br />Eto Average Potential Deep <br />Percolation (in/mo) <br />(in/mo) (in/day) <br />January 2.93 1.55 0.05 1.38 <br />February 2.21 2.24 0.08 -- <br />March 2.38 3.72 0.12 -- <br />April 1.51 5.10 0.17 -- <br />May 0.71 6.82 0.22 -- <br />June 2.09 7.80 0.26 -- <br />July 0.28 8.68 0.28 -- <br />August 1.05 7.75 0.25 -- <br />September 0.84 5.70 0.19 -- <br />October 1.06 4.03 0.13 -- <br />November 2.10 2.10 0.07 -- <br />December 2.38 1.55 0.05 0.83 <br />TOTALS (in.) 13.18 57.0 2.21 <br />Table 5 illustrates that evapotranspiration exceeds precipitation, even when using higher rainfall data that <br />exceeds normal rainfall data by 28% (10.33 in. vs. 13.18 in.). The Table also illustrates that during the <br />months of December and January and possibly November and February, deep percolation will occur. <br />5 <br />Chesney Consulting