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COLOR.4D0 DEPARTMENT OF PUBLIC HEALTH AND ENVIRONMENT, Water Qunlin• Co,rrrol Division <br />Rnnunnle -Page 4, Perndr No. CO-0038776 <br />B. Wastewater Treatment Description <br />The following changes ro the wastewater treatment system have occurred: <br />Sediment ponds MB-1, MB-2R and MB-3 have been lined with geoterrile clay liners. Sediment ponds MB-2R arul <br />MB-3 have been enlarged. As anticipated in an earlier faciliry discussion, pond MB-6 (oulfall 010J has been tnkerr <br />our ojservice and replaced by additional volume in pond MB-2R (ourfall 004J. Outfnl1010 will be elinrirrnrerl irr <br />this renewal. <br />/~ should be noted that n 1992 permit nme»dnrent addressed the rerouting of the e, jJluent front the donresric <br />wastewater treatment jnciliry (W4YTFJ from direct discharge to the North Fark ojthe Gun,risorr River to Porrrl MB- <br />2R, which discharges through oulfall004 to the North Fork ojrhe Gunnison River. This promprs.sorrre chnrrgec to <br />e~luenr limitations for outfal! 007, as described in section Vl. <br />Pursuant to the nuthoriry of Article 9, Title 25, Regulations jot the Certif+carion of Water Treatment Plnrrr nrrd <br />Wastewater Treatment Plant Operators, this faciliry will require a certified operator. <br />PERFORMANCE H/STORY <br />A. Monitoring Data <br />Discharge Monitorine Reoorts: Tables V-1, V-2, V-3, V-4, V-S and V-6 summarize the eJJlue+u data reponerl on <br />the quarterly Discharge Monitoring Reports IOMR'sJ jot outjalCr 002, 004, 005, 006, 007 nrrd 009, respectively, for <br />the Mountain Coal Company facility from October, 1993, through September, 1994. Ourfnlls 008, 010, 0l1 nrrrl <br />012 reponed 'rro discharge' jot all reporting periods during the period reviewed. <br />Table V-/ -- Sefj Monitoring Results jot Outfall 002 <br />No. of Reported Previous No. of <br />Reposing Concentrations Perini[ Lirttitation <br />Parameter Periods Avg/Min/Mar Limitation Erettrsions <br />Flo+v, MGD <br />30-r/m' rrvernge 4 0.08/0.003/0.24 none <br />r/oily mruimum 4 0.13/0.07/0.26 none <br />TSS, nrg/P <br />30-rlny rrvernge 4 23.7/15/33.6 35 <br />rlnily mruimum 4 33.5/15/52 70 <br />Tornl lrorr, mg/P <br />30-rlnv rrvernge 4 0.45/0.29/0.88 3.5 <br />rlnilvnr¢rinrum 4 0.90/0.41/1.35 70 <br />Oil cfr Grease, mg/P 4 NV/NV/NV 10 <br />pH, .~.n. 4 -/8.!/8.8 6.5-9.0 <br />Tnud Di.csolverl Solids, mg/P 4 1926/1430/2370 ,rove <br />0 <br />0 <br />Wlinle Effluent Toriciry, Acute 2 -/Pass/Pass See Permit 0 <br />NV vmnna none viaib(r <br />