1987-12-01_PERMIT FILE - C1981017 ‎(188)‎

• Permit No: C1981017
• IBM Index Class Name: PERMIT FILE
• Doc Date: 12/1/1987
• Doc Name: Wastewater Discharge Permits
• Section_Exhibit Name: Chapter IV Appendix IV-C-1
• Media Type: d
• Archive: No

PART I
Page 4b of 20
Permit No.: CO-0000396
A. TERMS AND CONDITIONS (Continued)
(d) Outfall 016 (Continued)
Any discharge or increase in volume of a discharge caused by
precipitation within any 24-hour period less than or equal to the 10-
year, 2-4-hour precipitation event (or snowmelt of equivalent volume)
may comply with the following limitations subject to burden of proof
requirements described in Part I.A.2..
Effluent Parameter Discharge Limitations
Maximum Concentration
30-Day Avg. a/ Daily Max. c/
Flow (MGD) N/A N/A
Total Recoverable Iron (mg/1) 1.0 2.0
Settleable Solids (ml/1) j/ N/A 0.5
Salinity N/A N/A
pH - (Standard Units) shall remain between 6.5 and 9.0 c/.
Oil and grease shall not exceed 10 mg/l c/ in any grab sample nor shall there
be a visible sheen.
Any discharge or increase in volume of a discharge caused by
precipitation within any 24-hour period greater than the 10 year,
24-hour event (or series of storms or snowmelt of equivalent volume)
may comply with the following limitations subject to burden of proof
requirements described in Part I.A.2.
Flow (MGD) - monitoring only per Part I.A.4.a.2)
Salinity - monitoring only per Part I.A.4.a.2)
pH - (Standard Units) shall remain between 6.5 and 9.0 c/.
Oil and grease shall not exceed 10 mg/l c/ in any grab sample nor shall
there be a visible sheen.
Additional conditions - effective at all times:
There shall be no discharge of floating solids or visible foam in other
than trace amounts. The discharge shall not contain any sanitary
sewage or other pollutants not associated with active mining operations.
Amended 2/25/86 njf
Amended 11/17/86 cw
Amended =Vi2i�.L1