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C-1 c9~~z <br />~~ <br />ENEC.4 <br />coa,ccmpanr Seneca Coal Company <br />RECE9VED <br />July 21, 2005 <br />Colorado Department of Health JUL 2 8 2005 <br />wQCD-PE-B2 <br />4300 Cherry Creek Drive South OMaoncfrn~nerelsanEGeology <br />Denver, CO 80246-1530 <br />RE: Quarterly Discharge Monitoring Report for Permit CO-0000221 <br />Dear Sir or Madam: <br />Pursuant to the quarterly reporting requirements contained in Colorado <br />Discharge Permit CO-0000221 for the Seneca Mine Complex, enclosed find <br />the second quarter 2005 discharge monitoring reports for Points 002 to <br />006 and 008 to 017. In this quarter, no discharges occurred at Points <br />009 and 014. Intermittent discharges occurred at Point 011 and 013. <br />Construction of Pond 014 was completed in September 2001, no discharge <br />has occurred yet. <br />Due to winter snow, vehicle access to Points 004, 008, 009, 015, 016 <br />and 017 was closed until May. Monthly visits in April were performed <br />by all-terrain vehicle or on foot. <br />One excursion of effluent limits occurred this quarter. A sample <br />collected on April 7 at Point 004 had a total recoverable iron value of <br />1.47 mg/1. The effluent limit is 1.0 mg/1. This discharge point was <br />receiving snowmelt at the time. It is suspected that this high iron <br />value is related to the relatively high total suspended solids value, <br />26 mg/1. Total recoverable iron values at this site were 0.23 mg/1 in <br />May and 0.10 mg/1 is June, indicating that the excursion was transitory <br />and that the discharge point is now in compliance. <br />Please contact me at 970-276-5209 if you have any questions. <br />Sincerely, <br />h.J ~'^'~ <br />Dennis Jo es <br />Hydrologist I <br />cc: Division of Minerals and Geology <br />Attn. Mike Boulay <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203-2273 <br />~.. <br />Seneca Coal Company • P.O. Box 670 • Hayden, Colorado 81639 <br />Telephone (970) 276-3707 . FAX (970) 276-3014 <br />