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WHIRLWIND MINE <br />2010 Radon Emission Calculation Sheet <br /> <br /> <br /> <br />onth/Year Air <br />Circulation <br />Rate <br />cfm <br />Hours of <br />Operation <br />hours <br />Ventilated Air <br />Volume <br />Liter <br />Average Radon <br />Concentration <br />Ci/L <br />Radon <br />Emission <br />Ci <br />January 2010 3,540 5.7 34,000,000 120.9 0.004 <br />February 2010 3,540 1.0 6,000,000 120.9 0.001 <br />March 2010 3,540 2.4 14,000,000 120.9 0.002 <br />April 2010 3,540 1.5 9,000,000 120.9 0.001 <br />May 2010 5,200 2.4 21,000,000 120.9 0.003 <br />June 2010 5,200 6.0 53,000,000 120.9 0.006 <br />July 2010 5,150 19.3 168, 900, 000 120.9 0.020 <br />August 2010 5,200 14.6 129,000,000 120.9 0.016 <br />September 2010 5,200 1.0 8,800,000 120.9 0.001 <br />October 2010 5,200 3.5 31,000,000 120.9 0.004 <br />November 2010 5,200 4.9 43,000,000 120.9 0.005 <br />December 2010 <br /> <br />5,200 <br />L <br /> <br />4.5 <br /> <br />40,000,000 <br /> <br />120.9 <br /> <br />0.005 <br />2010 Total 0.07