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e!" UJ U~ Cr a ~EiV~C,4 Coal Company Seneca Coal Co Eli/ED Colorado Department of Health WQCD-PE-B2 4300 Cherry Creek Drive South Denver, CO 80246-1530 Division of Minerals and Geola®Y RE: Quarterly Discharge Monitoring Report for Permit CO-0000221 Dear Sir or Madam: Pursuant to the quarterly reporting requirements contained in Colorado Discharge Permit CO-0000221 for the Seneca Mine Complex, enclosed find the first quarter 2004 discharge monitoring reports for Sites 002 to 006 and 008 to 017. In this quarter, no discharges occurred at Points 009, 013, and 014. Intermittent flows were observed at Points 005, 011, 012 and 017. Construction of Pond 013 was completed in December 2003, no discharge has occurred yet. Construction of Pond 014 was completed in September 2001, no discharge has occurred yet. Vehicle access to Points 004, 005, 008, 009, 010, 015, 016 and 017 was closed starting in November due to snow. Monthly visits were performed by snowmobile or snowshoe. One excursion of effluent limits occurred this quarter. At Point Oll, a sample collected on March 22 had a total iron value of 5.22 mg/l, which is above the 30-day average limit (3.0 mg/1) but is below the daily maximum limit (6.0 mg/1) Only one total iron sample was .collected in March. It is suspected that the high iron value was caused by suspended solids (28 mg/1). The sample was collected during snowmelt runoff, and therefore, Seneca requests a variance of the total iron limit as allowed for in our permit {part I.A.2) Attachment A is from a 11/23/03 Colorado Division of Minerals and Geology (CDMG) inspection. The highlighted portion indicates "that Pond 011 has been successfully cleaned out and that the required capacity ... has been restored." Attachment B is from a 2/25/04 CDMG inspection. The highlighted portion indicates that the Yoast Mine (where Pond Oll exists) was "heavily covered in snow." Attachment C is data from the Colorado Climate Center's website for March 2004 at NOAA's Hayden, Colorado station, which exists about nine miles away from Pond 011. The Tmax column indicates that the maximum temperatures for the days preceding March 22 were in the 70's, which indicates temperatures high enough to induce saowpack melting. Finally, a sample collected from Pond Oll on April 12, 2004 1-ead a total suspended solids value of 12 mg/1 and a total iron value of 0.35 mg/1 (verbal communication with ACZ Lab, no April 20, 2004 APR 2 9 2004 Seneca Coal Company • P.O. Drawer D • Hayden, Colorado 81639 Telephone (970) 278-3707 • FAX (970) 276-3014