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1 <br />1 <br />1 <br />1 <br />1 <br />i <br />1 <br />1 <br />1 <br />'1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />a1 <br />1 leach tanks will be enclosed in steel structures <br />2 that will contain all the slurry and solution. <br />3 The solution will then be leached with a <br />4 dilute cyanide solution, and I want to point out <br />5 that the concentrations in this process are <br />6 approximately half the strength of the concentrations <br />7 required in the heap leach process, and that's due <br />8 in part to the finer particle size that you are <br />9 leaching in the carbon in leach. <br />10 UNIDENTIFIED PERSON: What is that <br />11 concentration? <br />12 MS. BALDRIGE: 125 parts per million <br />13 total cyanide and estimated 60 parts per million <br />14 free cyanide. <br />15 UNIDENTIFIED PERSON: Thanks. <br />16 UNIDENTIFIED PERSON: Will the vats be <br />17 totally buried or totally on the surface? <br />18 MS. BALDRIGE: They sit on a c;oncrete <br />19 pad with curbing. Several of them are within the <br />20 mill building and others are outside the mill <br />21 building, but they sit on a concrete pad with <br />22 curbing. <br />23 The slurry that's put into the leach <br />24 tanks is agitated and air is added and after <br />25 approximately 40 hours the solution can be removed <br />AGREN, BLANDO fi BILLINGS <br />