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<br /> <br />Free CN- <br />(Calculation Method Demonstrated by ASCI) <br />* Calculation assumes 50 ppm Cu in both the collection pond and the <br />lower pond. <br />Date Sampled 5f28/42 <br /> WAD Cu* WAD Cu Free CN <br /> as Cu(CN)2 (calculated) <br /> _ .825 x Cu , <br />Upper Pond 69 50 41 28 <br />Lower Pond 100 50 41 59 <br />Collection Pond 75 50 41 34 <br />