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<br /> <br />Mr. Jim McArdle <br />November 18, 1981 <br />Page Two <br />Cotter Corporation <br />2. The average percent uranium content of sorter reject rock is about <br />0.015%, with a maximum of about 0.05%. Sorter reject rocF: is not <br />the only component of the waste dump. A significant portion of the <br />waste dump consists of barren mine development rock. <br />3. Please refer to the map in Appendix C of the permit application <br />for a description of the temporary waste dump. <br />4. No response required. <br />5. The final configuration of the temporary dump has not beer. deter- <br />mined. Stability problems have not been encountered to date. <br />6. Comments regarding site runoff will be addressed in a subsequent <br />letter. <br />7. The small earth moving operation at the north end of the permit <br />area is associated with the temporary dump. <br />Protection of Hydrologic System ~ / <br />~~....~~ z~P -~~-c~ *~.-may/" <br />1. _ 6 <br />2. <br />3. Comments regarding runoff control will be addressed in a sub- <br />sequent letter. <br />4. <br />5. <br />6. Cotter discharges Ra-226 from earthen pond #3 in accordance with <br />NPDES Permit No. CO-0001244. Average dissolved radium concentration <br />in the discharge ranges between 1.0 and 2.0 pCi/1. The dissolved <br />radium discharge limit for a monthly composite sample is 3.0 pCi/1. <br />Wildlife <br />Wildlife use of the settling ponds, especially waterfowl, rarely occurs. <br />Major Structures In and Adjacent to Permit Area <br />No response required. <br />Toosoil Handlin <br />No response required. <br />