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<br /> 43 <br />r <br /> 1 as a cyanide gas from the facility. And for the <br /> 2 tailings, the sulfuric acid will lower the pH to <br />' 3 st results <br />7 <br />And bas <br />abo <br />t 7 <br />6 <br />7 <br />d <br />t <br />th <br /> . <br />, <br />u <br />. <br />, <br />. <br />e <br />on our <br />e <br />e <br />' 4 levels of cyanide in the tailings will be less than <br /> 5 3.8 parts per million free cyanide. <br /> 6 At that point the slurry is sent to the <br /> 7 tailings disposal area for disposal. I'm~ going to <br />' 8 give a brief discussion of the tailings disposal <br /> 9 area and then I'll let Rob Dorey, at the end of my <br /> <br /> l0 presentation, go into depth on that. <br />' 11 The point that I want to make is that <br /> 12 this is not a traditional tailings impoundment. <br />t 13 This is a unique design concept. There are no other <br /> 14 tailings impoundments, to my knowledge, like this in <br /> 15 the state of Colorado, although it is used quite <br /> 16 commonly in other parts of the U.S. and the world. <br /> 17 This tailings facility design is a <br />' 18 method called thin layer deposition. As l: said, Rob <br /> 19 will get into the design concepts, but I want to <br />' 20 explain to you the difference between tradiitional <br /> 21 tailings disposal and thin layer depositicn. <br />' <br /> 22 Traditional tailings disposal usually <br /> 23 occurs using one or two deposition points and the <br /> 24 stuff is just put out there in a pipe. In thin <br />' 25 layer deposition, you actually create a spigotting <br />' AGREN, BLANDO & BILLINGS <br /> <br /> <br />