PERMFILE132928

• Permit No: C1984065
• IBM Index Class Name: Permit File
• Doc Date: 1/10/2003
• Doc Name: CDPES permit
• Section_Exhibit Name: Appendix 4.7-7 CDPS Industrial General Permit COG-850005
• Media Type: D
• Archive: No

PARTI
Page No. 4
Permit No. COG-850000
EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
1. Efl]uent Limitations
• a. Active Minin¢ Outfalls
ACTIVE MINING PRIMARY LIMITATION'S
Flow, MGD Report
'Total Suspended Solids, mg/1 35
Total Iron, mg/1
Existing Sources 3.5
New Sources 3.0
Total Manganese, mgll 2.0
'Settleable Solids, mVl Report
pH,s.u. N/A
Oil and Grease, mg/I N/A
Total Dissolved Solids, rng/1•• Report
Total Phosphorus (as P), mg/1••• Report
Report
70
7.0
6.0
4.0
Report
6.5-9.0
10
Report
Report
ACTIVE MINING ALTERNATE LIMITATIONS
Any discharge or increase in the volume of a dischazge caused by precipitation within any 24-hoar period less than or equal to the
0-veaz. 24-hour nrecinitation event (or snowmelt of equivalent volume) >??~ comply with the following limitations -- subject to
burden of proof requirements described in Part I.B.l.d).
~" :.m~ it's'?-.`'0i'y~, ~.8r~r~TP`IrPS1.,w'~;~ .L ,.:~.A'.~':! ..~. ~_.: ~ JC:_•, C31. y .al-+~~''a}+~-YO.
•
Flow, MGD Report Report
'Total Suspended Solids, mg/1 Report Report
Total Iron, mg/1
Discharges from mountainwp removal, and steep slope areas. Report 7.0 "•
All other discharges covered under this permit. Report Report
Total Manganese, mg/1 Report Report
'Settleable Solids, mUl Report 0.5
pH, s.u. NIA 6.5-9.0
Oil and Grease, mg/1 N/A 10
Total Dissolved Solids, mg/1•• Report Repoli
Total Phosphorus (as P), mg/1••• Report Report
These alternative limitarions pertain to storm evrnts less than a 24fiour period, less then or equal to a two-ytaz, 24-hour precipitation turn[ (or snowmclt of
tquivslmt volurtse) only.
'Total Suspended Solids, mg/1 Report Report -
Total Iron, mgJl Report Report
Total Manganese, mg/1 Report Report
'Settleable Solids, ml/I Report Report
pH, s.u. N/A 6.5-9.0
Oi! and Grease, mg/l N/A 10
Total Dissolved Solids, mg/1•• Report Report
Total Phosphorus (as P), mg/1••• Report Report
•If discharge is to land, TSS and settleable solids monitoring is waived.••Applies only to drainages within the Colorado River Basin
•"Applies only to drainages directly above Chatfield Reservoir, Cherry Creek Reservoir, Dillon Reservoir, or Upper Bear Creek
Any discharge or increase in the volume of a dischazge caused by precipitation within any 24-hour period treater than [he ] 0 veaz.
24-hour precipitation event (or snowmelt df equivalent volume) ~ comply with the foAowing limitations -- subject to burden of
proof requirements described in Part LB.l.d).