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~- ~ iiiiiiiiiiiiimiii <br />999 <br />~,~ <br />sE~vE P~4 Seneca Coal Company <br />July 23, 2001 <br />Colorado Department of Health F'~vEIVED <br />WQCD-PE-B2 <br />4300 Cherry Creek Drive South OGT 2 ~ 20011 <br />Denver, CO 80222-1530 <br />~i°' ~1 of "'ir.' a!s 8 Ge lom• <br />RE: Quarterly Discharge Monitoring t~epor~ 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 2001 discharge monitoring <br />reports for Sites 002 to 006 and 008 to 017, In this quarter, <br />intermittent discharges occurred at Points 005 and 006; no <br />discharges occurred at Point 009. Weekly vehicle access to <br />Points 015 and 016 were closed in April due to deep snow, monthly <br />visits in April were conducted with a snowmobile. Points 013, <br />014 and 017 have not been constructed yet. <br />In a letter dated June 1, the Division was notified of a <br />Ceriodaphnia WET test failure on a sample collected May 22 at <br />Point 016. Accelerated tests were conducted on samples collected <br />May 30 and June 4. Both of those tests passed, and the Division <br />was again notified in a letter dated June 13 that the toxicity <br />episode lead ended. Both of these letters have been attached. <br />The cause of the initial failure is unknown. No other effluent <br />limits were exceeded this quarter. Please contact me at 970-276- <br />5109 if you have any questions. <br />Sincerely, <br />~~ C.~'~---~ <br />Dennis Jones <br />Hydrologist I <br />cc:~ Division of Minerals and Geology <br />,V// Attn. Mi~:e 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 />