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<br />3.2 Air Effluent <br />The potential sources of emission into the atmosphere due t~~ the <br />operation of the ore sorter are: Radon 222 and particulate from orE> crushing <br />operations; fugitive dust due to wind erosion of the ore piles adjacent to <br />the ore sorter; fugitive dust emission at the ore shipment pad due 1:o wind <br />erosion. Control of dust and Radon 222 emissions will be discussed in the <br />context of each individual source, and in terms of compliance with 40 CFR 190. <br />Estimation of Rn-222 released during crushing operation: <br />~~ A. Assumptions: <br />1. Rn-222 in secular equilibrium with uraniu m. (See Appendix C, <br />Environmental Report for Cotter mill regarding Schwartzwalder <br />ore) <br />2. Nominal production capacity: 600 tons per day. <br />3. Average U30g content in ore: 0.35%. <br />4. Fraction of Rn-222 released: 20% - 80% (EPA, 1973) <br />' • 5. 0.85 gram U-238 per gram U30g <br />6. 0.333 uCi per gram U <br />7. 907 K9 per ton <br />Q = 600 tons ore x 907 K~jc x 1000 g x .0.0035 g U~Og 0.85 ~) U-238 <br />day ton Kg g ore g U30g <br />x 0.33 uCi x 0.8 <br />g U-238 <br />= 4.99 uCi <br />Sec <br />B. Controls: <br />1. The emission of Rn-222 is not vented directly to the atmosphere. <br />Rn-222 can also be expected to diffuse in the building environ- <br />ment and be dispersed to the atmosphere through open doors, <br />conveyor passages and roof vents. <br />2. It should be noted that Cotter Corporation, the U. S. Bureau of <br />Mines, and others conduct regularly scheduled Radon monitoring <br />within the building environment of the ore sorter. The observed <br />values of Radon within the ore sorter building have been can- <br />. sistently be]ow 0.3 work level and are not anticipated to exceed <br />this level. (See Table 3.2-1) <br />Referring to Section 5.0, a personnel and work station (general) <br />air sampling program for particulate and radon monitoring is <br />being implemented by Cotter. <br />