2008-12-04_PERMIT FILE - C1981033

• Permit No: C1981033
• IBM Index Class Name: Permit File
• Doc Date: 12/4/2008
• Section_Exhibit Name: EXHIBIT 04 PERMITS FOR MINING
• Media Type: D
• Archive: No

PART I
Page No. 4
Permit No. CO-0044377
• A. DEFINITION OF EFFLUEN'T' LIMITATIONS
I. Effluent Limitations (continued)
(b) Outfall 004 (continued)
Effluent Parameter
Discharee Limitations
30-Dar Ave Daily Max
Flow, MGD
Total Suspended Solids, mg/P
Total Iron, mg/P
Settleable Solids, mP/P
Oil and Greaze, mg/P
pH, s.u. (minimum-maximum)
Total Dissolved Solids, mg/P
N/A N/A
Report Report
Rcpon Report
NIA 0.5
N/A IO
N/A 6.5-9.0
Report Report
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 Pan I.A.3.
Effluent Parameter Discharee Limitations
30-Dav Are Daily Max
Flow, MGD N/A N/A
Total Suspended Solids, mg/P Report Report
•
Totallron, mg/P Report Report
Settleable Solids, mP/P N/A Report
Oil and Grease, mg/P N/A l0
pH, s.u. (minimum-maximum) N/A 6.5-9.0
Total Dissolved Solids, mg/P Report Report
2. Acute ~t'ET Testine-Outfall 001
(a) Testine and Rcoortine Reouircmcnts
Tests shall be done at the frequency listed in Part I.B.I. Test results shall be reported along with the Discharge
Monitoring Report (DMR) submitted for the reposing period during which the sample was taken. (i.e., WET testing
results for the first calendar quaver ending March 3l shall be reported with the DMR due April 28.) The results
shall be submitted on the Acute Toxicity Test report form, available from the Division. Copies of these reports are
to be submitted to both the Division and EPA along with the DMR.
The permittee shall conduct an acute 48-hour WET test using Ceriodaphnia sp., and an acute 96-hour WET test
using fathead minnows. Acute tests will be replacement static tests of a single effluent grab sample. The permittee
shall conduct each acute WET test in general accordance wi[h methods described in Methods for Measuring the
Acute Tozicitv of Effluents and Receivine Waters to Freshwater and Marine Oreanisms, EPA/600/4-90/027 or the
most current edition, except as modified by the most current Division guidance document entitled Guidelines for
Conductive Whole Effluent Tonicity Tests.
•
Sce Part I.C. for Definitions.
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