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B. EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS <br />1. Effluent Limitations <br />a. Active Mining Ontfalls <br />•Total Suspended Solids, mg/1 35 70 <br />Total Iroa, mg/l <br />Existing Sotttces 3.5 7.0 <br />New Sources 3.0 6.0 <br />Total Manganese, mg/1 2.0 4.0 <br />•Settleable Solids, mUl Report Report <br />pH, s.u. N/A 6.5-9.0 <br />Oi] and Grease, mg/1 N/A ]0 <br />Total Dissolved Solids, mg/1•• Report Report <br />Total Phosphoms (as P), mg/1••• Report Report <br />PARTI <br />Page No.4 <br />Permit No. COG-850000 <br /> <br />ACTIVE MINING ALTERNATE LIMITATIONS <br />Any discharge or increase in the volume of a dischazge caused by precipitation within any 24hottr period less than or equal [o the <br />10-veaz. 24hotu nrecioitation event (or snowmelt of equivalent volume) >~ comply with the following limitations -- subject to <br />burden of proof requirements described in Part I.B.I.d). <br />Flow, MGD Report Report <br />•Total Suspended Solids, iragll Report Report <br />Tota] Iron, mg/1 <br />Diuhazges from mountaintop removal, and steep slope areas. Report 7A" <br />Al other discharges covered under this penmt. Report Report <br />Total Manganese, mg/[ Report Report <br />•Settleable Solids, inl/1 Report 0.5 <br />pH, s,u. N/A 6.5-9.0 <br />Oil and Grease, mg/1 N/A 10 <br />Total Dissolved Solids, mg/1•• Report Report <br />Total Phosphoms {as P), mg/I«• Report Report <br />hcsc aloernative limitations pertain to storm evrnu less than a 24-hour period, less than or equal [o a two-yeaz, 24-ho[a precipitation evrnt (or snowmen of <br />equivalent volume) only. <br />•Total Suspended Solids, mg/I <br />Total Iron, mg/1 <br />Total Manganese, mg/I <br />Report Report <br />Report Report <br />Report Report <br />•Settleable Solids, ml/1 Report Report <br />pH, s.u. N/A 6.5-9.0 <br />Oi] and Grease, mg/1 N/A 10 <br />Total Dissolved Solids, mg/1+' Report Report <br />Total Phosphorus (as P), mg/1••• Report Report <br />Hf discharge is to land, TSS and senlcabie solids moni[oring is waived.••Applies only to drainages within the Colorado River Basin <br />•"'Applies only to dramages directly above Chatfield Reservoir, Cherry Creek Reservoir, Dillon Reservoir, or Upper Bear Creek <br />ACTIVE MINING PRIMARY LIMITATIONS <br />Any discharge or increase in the volume of a discharge caused by precipitation within any 24-hour period Beater than the 10-veaz, <br />24-hour orecipitation event (or snowmelt of equivalent volume) may comply with the following limitations - subject to burden of <br />proof requirements described in Part I,B. t.d). <br />