PERMFILE52560

• Permit No: C1981047A
• IBM Index Class Name: Permit File
• Doc Date: 8/15/2002
• Section_Exhibit Name: Exhibit J Other Licenses and Permits
• Media Type: D
• Archive: Yes

PART 1
Page No. 4
Permit No. COG-850000
B. EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
1. Effluent Limitations •
a. Active Mining Outfalls
ACTIVE MINING PRIMARY LIMITATIONS
Flow, MGD Report Report
'Total Suspended Solids, mg/1 35 70
Total Iron, mg/1
Existing Sotuces 3.5 7.0
New Sottrces 3.0 6.0
Total Manganese, mg/1 2.0 4.0
'Settleable Solids, mVl Report Report
pH, s.u. N/A 6.5-9.0
Oil and Grease, mg/I N/A ]0
Total Dissolved Solids, mg/1•• Report Report
Total Phosphoms (as P), mg/1••• Report Report
ACTIVE MINING ALTERNATE LIMITATIONS
'Total Suspended Solids, mgll Report Report
Total Iron, mg/1
Dischargcs from mountaintop removal, and steep slope areas. Report 7.0 "`
All other dischazges covered under this permit. Report Report
Total Manganese, mg/1 Report Report
'Settleable Solids, mUl Report 0.5
pH, s.u. N/A 6.5-9.0
Oil and Grease, mg/1 N/A 10
Total Dissolved Solids, mg/1•• Report Report
Total Phosphorus (as P), mg/1••• Report Report
These alternative limitations pertain to storm evrnts less than a 24-hour period, less than or equal to a two-year, 24-hour precipitation evrn[ (or snowmelt of
equivalrnt volume) only.
Any tiischazge or increase in the volume of a discharge caused by precipitation within any 24-hour period Qreater than the 10-veaz.
24-hour precipitation event (or snowmelt of equivalent vollune) may comply with the following limitations -- subject to burden of
proof requirements descnbed in Part I.B.l.d).
Flow, MGD Report Report
'Total Suspended Solids, mg/1 Report Report
Total Iron, mg/1 Report Report
Total Manganese, mg/1 Report Report
'Settleable Solids, ml/1 Report Report
pH, s.u. N/A 6.5-9.0
Oil and Grease, mg/I N/A ] 0
Total Dissolved Solids, mg/I•• Report Report
Total Phosphorus (as P), mgR••• Report Report
•IC dischargc is to land, TSS and scttleable solids monitoring is waived.••Applies only to drainages within the Colorado River Basin
•"Applies only to drainages dirtttly above Chatfield Reservoir, Cherry Creek Reservov, Dillon Reservoir, a Upper Bear Creck.
Any discharge or increase in the volume of a discharge caused by precipitation within any 24-hour period less than or eg_ual to the
]0-veaz. 24-hour nrecipitation event (or snowmelt of equivalent volume) n~ comply with the following limitations - subject to
burden of proof requirements described in Part I.B.I.d).