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E~.4 <br />s ~,~,~, c~ma,~y _ __ _ _ Seneca Coal Company <br />April 5, 2001 <br />Tarlla W3t5OI1 <br />Colorado Department of Health <br />WQCD-CMDM-P2 <br />4300 Cherry Creek Dri•/e Sou[h <br />Crenver, CO 80222-1533 <br />RE: DMR Mistakes for Permit CO-0000221 <br />Ms. Yla~ snn, <br />Tt.is letter serves to follow up an our phone conversation last <br />creek, r_oncerning the mistakes I found on the first quarter 2001 <br />CMR:: for Colorado Discharge Permit CO-0000221 for the Seneca Mzne <br />_-~mplex. F'or Faints 004, 005, 008, 009 and 011, the following <br />mistakes were found. Page 1: the monitoring per.tod for pII was for <br />March only (it should be for the entire quarter). Page 2 (TSS, <br />STS, iron and O/G (lab value)) is OK. Page 3: the monitoring <br />period for flow was for March only (again, it should cover the <br />entire quarter). Fage 4 (TDSI is OK. Page S: Oii/Grease (O/G) <br />visual, the monitoring period is for March only (again, it should <br />cover the entire quarter). Uata on these five pages would fit <br />into two pages iE the DMRs were correct. <br />All of the mistakes noted above were Eound only in the first <br />quarter, the remaining quarterly DMRa were found to be correct. <br />I suspect that these mistakes are a hold over from monitari.ng <br />frequencies that exietcd prior to our last amendment in 1999. <br />Frior to that amendment, the monitoring frequency for pH, O/G and <br />flow, for the points mentioned in the previous paragrapk:, was <br />monthly rn Januar,r and February and weekly in March. Since the <br />1599 amendment, the monitoring frequency is monthly year-round. I <br />also t:or_ed tyre same mistakes on the first quarter 2000 DMRe. <br />For Points 012, Ui3, 014, 016 and 017, t:.he correct monitoring <br />frequency for pH is weekly (not monthlyl. For those same points, <br />the WET test requirements are for both Ceriodaphnia and <br />Pzmephales, while only r_eriodaF,hnia .is listed on the Ph1RS. Both <br />these mzstakes (pH and WL:T tests) were found on DMRs for aii four <br />quarters, not lust thF• first quarter. <br />I have already .completed the fiz•st quarter DMRs, making <br />corrections to the mistakes [toted above. I currently have on <br />fzlr blank UMRs uo to the end ut the year. You may rerun ttlose <br />if yo~.r feel it is necessary, althc+ugh I have no problem with <br />nsir:y the remaining UMRG. Correcting those mzstaF:es is minor. <br />Seneca Coal Company • P.O. Drawer D • Hayden. Colorado 81839 <br />Telephone (970( 276.3707 FAX (970) 276.3014 <br />