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i ii i ini iii iiii i ii i <br /> 999 <br />. /~~~ \ <br />S~ oE~ Seneca Coal Company <br />October 26, 1999 <br />RECEIVED <br />Colorado Department of Health <br />WQCD-PE-B2 <br />4300 Cherry Creek Drive South <br />Denver CO 80222-1530 <br />NOV U1 1999 <br />pNision of Minerals 8 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 third quarter 1999 discharge monitoring reports <br />for Sites 002 to 008 and 009 to 017. In this quarter, discharges <br />were continuous at Points 002, 003, 004, 008 and 010; discharges <br />were intermittent at Points 005, 006, and 009; and no discharges <br />were noted at Points 011, 012, and 015. Points 012 and 015 are <br />new sites that were constructed this quarter. Points 013, 014, <br />016, and 017 have not been constructed yet. <br />A NPDES permit amendment went into effect on September 1. This <br />amendment authorized six new discharge points (012 to 017). It <br />also authorized a reduction in monitoring frequencies (from <br />weekly to monthly) for flow, pH, and visual oil/grease at the <br />previously existing sites (except 003). As a result, several <br />mistakes were noted on the DMRs. I have corrected those DMRs as <br />I saw necessary. Please contact me at 970-276-5109 if you have <br />any questions. <br />Sincerely, <br />~~ ~A~~ <br />Dennis Jones <br />Hydrologist I <br />cc: Division of Minerals and Geology <br />/ Attn. Mike Boulay <br />(,/J 1313 Sherman Street, Room 215 <br />Denver, CO 80203-2273 <br />6~X G7o <br />Seneca Coal Company P:O.-Btawer-B~ ' Hayden, Colorado 61639 <br />Telephone (970) 276-3707 FAX (970) 276-3014 <br />