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.. ~. <br />E~~.4 <br />Coal Company <br />III IIIIIIIIIIIII III <br />Seneca Coal Compa <br />January 5, 1998 '`~ "-'~ <br />JAN 0 91998 <br />Colorado Department of Health <br />WQCD-PE-B2 <br />4300 Cherry Creek Drive South <br />Denver, CO 80222-1530 <br />^b,v~on of Mine~a~s & ~eo'~.:~:; <br />RE: Quarterly Discharge Monitoring Report for Permit CO-0000221 <br />Dear Sir or Madam: <br />Pursuant to the quarterly reporting requirements contained in <br />Colorado Discharge Permit CO-0000221 for the Seneca Mine Complex, <br />enclosed find the fourth quarter 1997 discharge monitoring <br />reports for Sites 002, 003, 004, 005, 006, 008, 009, and 010. <br />Construction of Site 011 was completed in October 1997. <br />Site 006 has experienced exceedences of the daily and monthly <br />effluent limits for total suspended solids (TSS) and total iron <br />due to high values of those parameters for a sample collected on <br />October 30. These exceedences are discussed in the attached <br />October 31 and November 14 letters. A sample collected on <br />November 12 indicates that the water quality from this site has <br />improved considerably (the TSS value was only 22 mg/1, see <br />attached lab report). The clean out of this pond was finished on <br />December 1. No discharges have occurred since then. <br />Please also note that the WET test DMR's for Sites 002, 003, and <br />006 have remarks on them pertaining to incorrect sampling <br />frequencies. The correct frequencies are found on Page 14 of the <br />Rationale section of our permit. These are the frequencies that <br />we historically complied with. The frequencies stated in Part I, <br />Page 14 (of the actual permit) are incorrect. I talked to Son <br />Kubic of your Division (he was the permit writer) today and he <br />agreed with me that the frequencies stated in the Rationale <br />section are the correct ones. He stated that he will be sending <br />out corrections shortly. <br />Please contact me if you have any questions. <br />Sincerely, "~`~ <br />~~•~~ <br />Dennis Jones <br />Hydrologist I <br />Seneca Coal Company • P.O. Drawer D • Hayden, Colorado 81639 <br />Telephone (970) 2763707 • FAX (970) 276-3014 <br />