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r I r r r r IF r IF r IF IF r r r r r r r <br /> Riechers Spence Associates Job #: 21 02 049.0 <br /> Consulting Civil Engineers ELHERS FAMILY ESTATE WINERY Date: 10/23/2002 <br /> Rainfall and Evaporation Rates <br /> Month Mean Rainfall 10-Year Rainfall Pond Rainfall Pan Evaporation Pond Evaporation <br /> (inches) (inches) (gallons) (inches) (gallons) <br /> September 0.40 0.560 2,689 6.710 4,012 <br /> October 0.90 1 .260 6,050 4.120 3,078 <br /> November 2.70 3.780 18,151 1.860 2,282 <br /> December 2.70 3.780 18,151 1 .060 1,859 <br /> January 3.20 4.480 21,512 1.190 2,551 <br /> February 2.60 3.640 17,479 1.940 4,769 <br /> March 2.70 3.780 18,151 3.830 10,364 <br /> April 1.30 1 .820 8,739 6.030 11,554 <br /> May 0.30 0.420 2,017 8.570 5,124 <br /> June 0.10 0.140 672 9.910 5,926 <br /> July 0.10 0.140 672 10.640 _ 6,362 <br /> August 0.10 0.140 6721 9.120 5,453 <br /> Total 17.100 23.940 114,955 64.98 63,334 <br /> Area to capture rainfall (pond watershed): 118.5' * 65' = 7702.5 5f I. <br /> NOTES: <br /> (1) Mean Rainfall: Based on World Climate publication (enclosed) <br /> (2) 10-Year Rainfall: Mean Rainfall x 1.4 <br /> (3) Pond Rainfall: 10-Year Rainfall * Area to capture rainfall <br /> (4) Pan Evaporation: Based on "Evaporation Table for the Western States" published by the <br /> Western Regional Climate Center/ Desert Research Institute (enclosed) <br /> (5) Pond Evaporation: Pan Evaporation * 0.8 * Area subject to Evaporation <br /> per"Hydrology & Hydraulic Systems", Gupta, 1989 <br />