HYDRO27562

• Permit No: C1982056
• IBM Index Class Name: Hydrology
• Doc Date: 3/31/1998
• Doc Name: AUTHORIZATION TO DISCHARGE UNDER COLO DISCHARGE PERMIT SYSTEM
• Permit Index Doc Type: NPDES
• Media Type: D
• Archive: No

PART I
Page ld of 14
Permit No. CO-0027154
A. TERMS AND CONDITIONS
1. Effluent Limitations
b) Effluent Limitations For Outfalls 005 and 007 (continued)
i) Outfall 005 (continued)
ALTERNATE LIMITATIONS (continued)
Any discharge or increase Ln volume of a discharge caused by precipitation within any
24-hour period greater than the 10-veer. 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. -
Effluent Parameter Discharge Limitation
30-Dav Ave. ~ Daily Hax.
?low, MGD Report Report
Total Recoverable Iron, mg/1 1.0 Report
Iotal Recoverable Manganese, mg/1 Report Report
?otentially Dissolved Copper, mg/1 J 0.073 0.130
?otentially Dissolved Silver, mg/1 n/ Report Report
~M, standard units (minimum-maximum) N/A 6.5-9.0
)il and Crease, mg/1 (No visible sheen) N/A 10
?lectrical Conductivity, umho/cm 5340 Report
IET, Chronic Lethality
Through March 31, 1996 N/A Report
Beginning April 1, 1996 N/A See Part I.A.l.f)
ii) Outfall 007
Effluent Parameter Qischarge Limitation
30-Day Ave. ~ Daily Max. ~
'low, MGD Report Report
'oral Suspended Solids, mg/1 35 70
oral Recoverable Iron, mg/1 1.0 Report
oral Recoverable Manganese, mg/1 Report oil°' Report
otentially Dissolved Copper, mg/1 pJ 0.073 0.130
otentially Dissolved Silver, mg/1 D/ Report Report
H, standard units (minimum-maximum) N/A 6.5-9.0
it and Grease, mg/1 (No visible sheen) N/A 10
lectrical Conductivity, umho/cm 5150 Report
ET, Chronic Lethality
Through March 31, 1996 N/A Report
Beginning April 1, 1996 N/A See Part I.A.l.f)
ee Part I.D. for Footnotes
Amendment No. 2 Issued 07./f•f y~ Effective 09.0/ I f/