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Because Colowyo's ponds are flow-through treatment ponds and not containment ponds, it is not <br />possible to impound waters for an extended period of time once discharge levels have been <br />reached. These ponds were designed to treat stolmwater inflow for settleable solids to a level of <br />0.0 ml/1 during a 10-year 24-hour storm event. <br />It is Colowyo's belief that due diligence, good faith efforts and in-house procedures and practices <br />were followed prior to, during, and after the exceedence of TSS and Total Recoverable Iron <br />limitations reported from February 13, 2007 sampling and humbly request the grant of a waiver <br />from said limitations as allowed by our CDPS Permit at your discretion. <br />Thank you for your consideration. Please feel free to contact me if you have any questions or <br />concerns. I can be reached at (970) 824-1532. <br />Sincerely, <br />~A. rTeruiyson <br />Environmental Engineer <br />Encls. <br />Copy: Jim Stark (CDMG) <br />NPDES Reports Binder w/encl <br />C.F. 21.1.2 w/encl <br />Colowyo Mine • 5731 State Highway 13 • Meeker, Colorado 81641 <br />T +1 970 S24 1500 • F +I 970 824 1504 • www.nea.com <br />