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<br />?CGWCompeny Seneca Coal Company <br />Page 2 <br />of this above-average snowpack in April was responsible for the high <br />discharges from Pond 012. <br />2 and 3. A sample collected by Seneca on April 29 had a total iron <br />concentration of 3280 ug/1 and a total recoverable iron concentration <br />of 3520 ug/1. The effluent limits are 3000 ug/1 and 1000 ug/1 (monthly <br />average), respectively, during periods of no precipitation or snowmelt. <br />However, this sample was collected during a snowmelt runoff event and <br />therefore, an alternate of the iron limits ("report") is allowed for in <br />Seneca's discharge permit (Part I.A.1.g., pg. 9). A second flow <br />recorder chart for that day, indicating that snowmelt was still <br />happening, has been attached. <br />Finally, on the `MNO 5' DMR (for Pond 005) a nickel value of 170 ug/1 <br />was reported. This value is suspect, based on previous values from this <br />outfall. A rerun of this sample has been requested, but was not ready <br />in time to submit the DMR in the regulated timeframe. A corrected DMR <br />will be submitted later if the value is significantly different than <br />the value reported now. <br />Please contact me at 970-276-5209 if you have any questions. <br />Sincerely, <br />?Dennis Jo s <br />Hydrologist I <br />CC: Mr. Dan Mathews <br />Division of Reclamation, <br />1313 Sherman Street, Room <br />Denver, CO 80203-2273 <br />Mining and Safety <br />215 <br />Division of Reclamation, Mining and Safety <br />101 South 3rd, Suite 301 <br />Grand Junction, CO 81501 <br />(w/o attachments) <br />Seneca Coal Company . P.O. Box 670 • Hayden, Colorado 81639 <br />Telephone (970) 276-5217 9 FAX (970) 276-5222