HYDRO25740

• Permit No: C1981010
• IBM Index Class Name: Hydrology
• Doc Date: 2/7/1994
• Doc Name: RATIONALE FOR PUBLIC NOTICE
• Permit Index Doc Type: NPDES
• Media Type: D
• Archive: No

PART I
Page lb of 19
Permit No. CO-0032115
A. TERMS AND CONDITIONS
1. Effluent Limitations (continued)
(a) Outfalls 001. 003, 006, 008 and 010 (continued)
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) ma comply with the following limitations subject to burden of proof
requirements described in Part I.A.2.
Effluent Parameter
Discharee Limitations
30-Dav Ave Daily Max
Flow, MGD Report Report
Total Suspended Solids, mg/P Report Report
Total Iron, mg/2 Report Report
Settleable Solids, mC/¢ N/A Report
pH, s.u. (minimum-maximum) (003, 006, 008, 010) N/A 6.5-9.0
pH, s.u. (minimum-maximum) (001)
.Tune - September N/A 6.5-9.5
October - May N/A 6.5-9.0
Oil and Grease, mg/¢ N/A 10
(b) Outfalls 012 and 014
PRIMARY LIMITATIONS
Effluent Parameter
Flow, MGD
Total Suspended Solids, mg/A
Total Iron, mg/2
Settleable Solids, mP/R
pH, s.u. (minimum-maximum)
Oil and Grease, mg/P
Discharee Limitations
30-Dav Ave Daily Max
Report Report
35 70
3.0 6.0
N/A Report
N/A 6.5-9.0
N/A 10
ALTERNATE LIMITATIONS
Any discharge or increase in the volume of a discharge caused by precipitation within any
24-hour period less than or equal to the 10-vear 24-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
Flow, MGD
Total Suspended Solids, mg/p
Total Iron, mg/P
Settleable Solids, m2/X
pH, s.u. (minimum-maximum)
Oil and Grease, mg/P
Discharee Limitations
30-Dav Ave Daily Max
Report P,eport
Report Report
Report Report
N/A 0.5
N/A 6.5-9.0
N/A 10
Amendment 2 Issued Effective
See Part I.C. for Definitions.