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In an effort to unflerstand what is happening to the iron values, I've compiled selected <br />parameters for the last five years from our Annual Hydrology Reports for three <br />sample sites. The sites are NPDES 007, SW N108 (Calamity Draw upstream of the <br />NPDES 007 outfalQ, and SW N104 (the CCC ditch upstream of our permit area). The <br />CCC ditch is the principal source of water for the Nucla area, which includes our <br />permit. The parameters are Temp (C), Conductivity, Flow (cfs), pH, and Fe (tot). A <br />copy of the compilation is attached to this cover letter. <br />It appears that our water sources have average total iron values higher than our <br />discharge requirements. So, I'm not sure how we managed to stay in compliance for <br />so long. I would like to give you a week or [wo to review the data and then call to <br />discuss monitoring options to determine the problem <br />The quarterly WET test of Ponds 007 and 008 passed. <br />Slrieerely. <br />._i <br />I <br />Tom <br />Mine Engineer <br />cc: Tom Kaldenback, DMG (w/ enclosure) <br />Murari Shrestha, WFA (w/o enclosure) <br />file <br />