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~. <br /> <br />the establishment of vegetative cover will preclude the aener~tion <br />of leachate as evapotranspiration exceeds precipitation. <br />Probable Leachate Characteristics <br />Because no waste rock from the C-JD-8 Mine is yet available r <br />testing, the actual characteristics of any leachates which mi ht be <br />generated are unknown. The characteristics of the leachate ill be <br />dependent on the characteristics of the waste rock and the p ecip- <br />itation percolating through the rock. Attached are chemical analyses <br />from a waste rock leachate for materials from the Uravan Min ral Belt. <br />This analysis is from an EPA Draft document, "Evaluation of anagement <br />Practices for Mine Solid Waste Storage, Disposal and Treatme t". <br />Volume of Leachate Genera tee <br />As discussed above, the maximum volume of leachate generated <br />unreclaimed waste rock pile would be 50~ of annual precipitate <br />6 inches. (Due to implementation of the drainage protection <br />described below, no surface runoff will intercept the waste <br />~~les, the only infiltrating waters will bP due to direct pr <br />itation.) At their maximum extent, the waste rock piles on <br />and the C-JD-B tract will totai seven acres. The average von <br />leachate which might be generated annually would be: <br />from the <br />ion, or <br />plan <br />ock <br />cip- <br />he Doagy #2 <br />ume of <br />~ 43560 ft2 ~` orecin'ta*.ion __ ~,.~ _ <br />sc: ~s x -acre x ~ year - '` "' :r.. , .r;.,,:on <br />152,500 ft3 = 3.5 acre-feet. <br />This water will percolate into the ground. The fate of the leachate <br />will be a slow percolation through the underlying soil and ock. As <br />