PERMFILE116216

• Permit No: C1984062
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Doc Name: CHANGE IN PN COG-850013 FORMERLY CO-0036021 ROUTT CNTY
• From: CDOH
• To: CYPRUS MINERALS CO
• Section_Exhibit Name: EXHIBIT 4 ‎(Part 2)‎ NPDES CHANGE
• Media Type: D
• Archive: No

•
PART I
Page 4
Permit No. COG-850000
B. EFFLDENT LIMITATIONS AND MONITORING REQUIREMENTS
1. Effluent Limitations
(a) Active Mining
Effluent Parameter
Flow, MGD
Total Suspended Solids, mg/1
Total Iron, mg/1 (Eziatiag Sources)
Total Iron, mg/1 (New Sources) i/
Total Dissolved Solids, mg/1
(Colorado River Basin Only)
Total Phosphorus (as P), mg/1
(Dillon Reservoir Drainage Oaly)
Discharge Limitations
Hazimum Concentration
30-day avg. a/
N/A
35
3.5
3.0
N/A
Daily Maa. c/
N/A
Report
70
7.0
6.0
Report
Report
pH shall remain between 6.5 and 9.0 s.u. c/.
• Oil and grease shall not exceed 10 mg/1 c/ nor shall there be a visible sheen f/.
Any discharge or increase Sn the volume of a discharge caused by
precipitation within any 24-hour period less than or equal to the
10- ear, 24-hour reci itation event (or snowmelt of equivalent
volume ~ comply with the following limitations subject to burden
of proof requirements described in Part I.B.l.d).
Effluent Parameter Discharge Limitations
Mazimum Concentration
Daily Maximum c/
Flow, MGD Report ,
Settleable Solids, ml/1 h/ 0.5
Total Dissolved Solids, mg/1 Repott
(Colorado River Basin Only)
Total Phosphorus (as P), mg/1 Report
(Dillon Reservoir Drainage Only)
pH shall remain between 6.5 and 9.0 s.u. c/.
011 and grease shall not ezceed 10 mg/1 c/ nor shall there be a visible sheen f/
• See Part I.B.3. for Footnotes