PERMFILE120957

• Permit No: C1992081A
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Doc Name: NPDES Permit
• Section_Exhibit Name: TAB 13 APPENDIX 13-1
• Media Type: D
• Archive: Yes

PART I
Page 11
Permit No. COC-85000C
B. EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
3. Monitorine Requirements
In order to obtain an indication of the probable compliance or
noncompliance with the effluent limitations specified in Part I.B.1,
the permittee shall monitor all effluent parameters at the following
frequencies.
a) Active Mining Outfall(s)
Effluent Parameter Measurement Freouencv J Samole T~~e
Flow, MCD Weekly Instantaneous
or Continuous
pH, s.u. Weekly Grab
Oil and Grease, mg/1 Weekly Visual J
Total Suspended Solids, mg/1 Monthly Grab
Total Iron, mg/1 Monthly Grab
Settleable Solids, ml/1 g/ Monthly Crab
Total Dissolved Solids, mg/1 ~* Quarterly Grab
Total Phosphorus (as P), mg/1** Quarterly Crab
b) Post-Mining Outfall(s)
Effluent Parameter Measurement Freouencv ~ Samole Twe

Flow, MGD Monthly Instantaneous
or Continuous
Settleable Solids, ml/1 S/ Monthly Crab
Oil and Grease, mg/1 Monthly Visual J
pH, s.u. Monthly Grab
Total Dissolved Solids, mg/1 J* Quarterly Grab
Total Phosphorus (as P), mg/1** Quarterly Grab
* Total Dissolved Solids (TDS) monitoring is required only for discharges to
the Colorado River Basin. See specific facility certification rationale
to determine whether TDS monitoring is required.
** Total phosphorus monitoring is required only for discharges to the Dillon
Reservoir drainage area (i.e., Ten Mile Creek, Snake River, Blue River,
an:~ all other tributaries to the Dillon Reservoir) and for discharges to
the Upper Bear Creek drainage area. See specific facility certification
rationale to determine whether phosphorus monitoring is required.
See Part I.B.4, for footnotes
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