PERMFILE101726

• Permit No: C1981014
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Section_Exhibit Name: EXHIBIT 04 OTHER PERMITS
• Media Type: D
• Archive: No

COLORADO DEPARTMENT OF HEALTH, Water Quality Control Dlvlslon
Rationale - Page 5. PERMIT NUMBER: COG-850000
l •
EFFLUENT LIMITATIONS: (Continued)
- ACTIVE MINING -
Table 1
(Applicable Regulations)
Parameter SES WQS
Flow (MGD)
pH (s.u.)
Oil and Grease (mg/1)
Total Suspended Solids (mg/1)
Total Iron Cmg/1)
Settleable Solids (ml/1)
Total Dissolved Solids (mg/1)
(Colo. River Basin)
Total Phosphorus, as P (mg/1)
BPT BAT NSPS
------------------Monitoring Only----------------
6.0 - 9.0 6.5 - 9.0 6.0 - 9.0 N/A 6.0 - 9.0
10 N/A N/A N/A N/A
30/45 N/A 35170 N/A 35170
N/A N/A 3.5/7.0 3.5/7.0 3.0/6.0
N/A N/A N/A 0.5 N/A
------Monitor per Colo. Salinity Regulations-------
------Monitoring Dillon Reservoir Basin Only------
Table 2
(Final Limitations)
Parameter Limitation Basis
~ • Flow (MGD) Report Monitoring Only
pH (s.u.) 6.5-9.0 WQS
011 aad Grease (mg/1) 10 SES
Total Suspended Solids (mg/1) 35/70 BPT
Total Iron (mg/1) (Ezisting Sources) 3.5/7.0 BAT
Total Iron (mg/1) (New Sources) 3.0/6.0 NSPS
Settleable Solids (ml/1) 0.5 BAT
Total Dissolved Solids (mg/1)
(Colo. River Basin) Report Monitoring Only
Total Phosphorus, as P (mg/1) Report Monitoring Only
(Dillon Reservoir basin only)
- POST-MINING -
Parameter
Flow (MGD)
pH (s.u.)
011 and Grease (mg/1)
Settleable Solids (ml/1)
Total Dissolved Solids (mg/1)
(Colo. River Basin)
• Total Phosphorus, as P (mg/1)
Table 3
(Applicable Regulations)
SES W(~S BPT BAT NSPS
----------------Monitoring Only------------------
6.0 - 9.0 6.5 - 9.0 6.0 - 9.0 N/A 6.0 - 9.0
10 N/A N/A N/A N/A
N/A N/A N/A 0.5 0.5
------Monitor per Colo. Salinity Regulations------
------Monitoring Dillon Reservoir Basin Only-------