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LUCCA WINERY <br /> SOIL SUITABILITY & NITRATE LOADING STUDY <br /> MAY 2013 <br /> the "average rainfall' data. Evapotranspiration data was obtained from the California <br /> Irrigation Management Information System (CIMIS): <br /> Table 4 Precipitation and Evapotranspiration Data <br /> Precipitation and ETO Data <br /> Month 2 years in 10 will have more ETO Average Potential Deep Percolation <br /> precipitation than: (in/mo) (in/mo) y) ( ) <br /> January 442 ( ) (i 0.0 (in/mo) <br /> 1.05 0.03 3.37 <br /> February 3.2 1.87 0.06 <br /> .33 <br /> March 3.43 1-- <br /> 3.55 0.11 <br /> April 1.92 5.08 0.17 <br /> May 0.5 6.8 0.22 <br /> June 0.25 7.76 0.26 <br /> July 0.23 7.96 0.26 <br /> August 0.4 6.88 0.22 <br /> September0.76 5.13 0.17 <br /> October 1.39 3.39 0.11 -- <br /> November 3.31 1.72 0.06 1.59 <br /> December 3.67 1.03 0.03 2.64 <br /> Totals (in) 23.48 52.22 8.93 <br /> Note: 1. Precipitation data is derived from the San Joaquin County Soil Survey, developed by the NRCS <br /> 2. ETD data is derived from the average daily evaporation data from CIMIS Station #71, Modesto. <br /> Date range for the data source is from July 1987 to February 2013. <br /> This chart illustrates that evapotranspiration far exceeds precipitation, even when using <br /> higher rainfall data that exceeds normal rainfall data by 56%. Only in the months of <br /> January, February, November and December would deep percolation potentially occur. <br /> _ This data illustrates a relatively high potential for there to be significant <br /> evapotranspiration (or bare soil surface evaporation) from a wastewater disposal <br /> system design that may take advantage of evapotranspiration during favorable months <br /> - of the year. <br /> "' Page 17 <br />