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Table 2 <br />French Pit <br />90 Day Liner Leak Test Evaporation Worksheet <br />Yearly Evaporation = 40 in/yrl <br />Average Water Surface Area = <br />(September '08 to January '09) 26,250 ft2 <br />Average Water Surface Area = <br />(September '08 to January '09) 0.60 Acres <br /> <br /> <br />Month <br />Days of <br />Month <br />Monthly <br />Distribution <br />(%) <br />Monthly <br />Evaporation <br />(inches) Monthly <br />Evaporation <br />Volume <br />(gal) Monthly <br />Evaporation <br />Rate <br />(gpm) <br /> <br />Comments <br />January 31 3.0 1.20 19,636 0.44 End of Test, January 8 <br />February 28 3.5 1.40 - - <br />March 31 5.5 2.20 - - <br />April 30 9.0 3.60 - - <br />May 31 12.0 4.80 - - <br />June 30 14.5 5.80 - - <br />July 31 15.0 6.00 - - <br />August 31 13.5 5.40 - - <br />September 30 10.0 4.00 65,455 1.52 Start of Test, September 29 <br />October 31 7.0 2.80 45,818 1.03 <br />November 30 4.0 1.60 26,182 0.61 <br />December 31 3.0 1.20 19636.4 0.44 <br />Test Period Average 0.70 (gpm) <br />Notes: <br />1) Approximated from NOAA Technical Report NWS 33: Evaporation Atlas for the Contiguous <br />48 United States June 1982 <br />2) From "General Guidelines for Substitute Water Supply Plans For Sand and Gravel Pits Submitted to <br />the State Engineer Pursuant to SB 89-120 & SB 93-260" <br />3) Based on proportioned monthly evaporation rate times average exposed water surface area.