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,_ , r <br />III IIIIII~IIIIIIIII <br />ti~~~ <br />s~ aE~ Seneca Coal Company <br />July 27, zooo RECEIVED <br />Colorado Department of Health JUL 31 2000 <br />WQCD-PE-62 <br />4300 Cherry Creek Drive South <br />Denver, CO 80222-1530 Division of Minerals&Geology <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 second quarter 2000 discharge monitoring <br />reports for Sites 002 to 006 and 008 to 017. In this quarter, <br />discharges were observed every month at all points except Point <br />005 (no flow in June); no discharges were noted at Points 009 and <br />011. Points 013, 014, 016, and 017 have not been constructed <br />yet. No effluent limits were exceeded this quarter. Normal <br />vehicle access to Point 015 (over one mile of dirt road) was <br />restricted until May 22 due to snowpack and/or mud, weekly <br />monitoring was not performed prior to May 22, however, monthly <br />monitoring (via snowmobile or all-terrain vehicle) was performed <br />prior to May 22. <br />Due to an error at the laboratory, total suspended solids (TSS) <br />values were not measured on samples collected on May 15 at Points <br />004, 008, and 012. This error was not noted until June 6. The <br />cause of this error has been corrected. TSS values in April and <br />June at these three sites were in compliance. Total settable <br />solids values for these three sites on May 15 were all less than <br />0.4 ml/1. Please contact me at 970-276-5109 if you have any <br />questions. <br />Sincerely, <br />~ ~~~ <br />Dennis Jones <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 />Seneca Coal Company P.O. Drawer D Hayden, Colorado 81639 <br />Telephone (970) 276-3707 FAX (970) 276-3014 <br />