PERMFILE116216

• Permit No: C1984062
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Doc Name: CHANGE IN PN COG-850013 FORMERLY CO-0036021 ROUTT CNTY
• From: CDOH
• To: CYPRUS MINERALS CO
• Section_Exhibit Name: EXHIBIT 4 ‎(Part 2)‎ NPDES CHANGE
• Media Type: D
• Archive: No

PART I
Page 7
Permit No. COG-850000
B. EPFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
2. Monitoring Requirements
In order to obtain an indication of the probable compliance or
noncompliance with the effluent limitations specified Sa Part I.B.1,
the permittee shall monitor all effluent parameters at the following
frequencies.
(a) Active Mining
Effluent Parameter Measurement Frequency d/ Sample Type e/
Flow, MGD
Total Suspended Solids, mg/1
Total Iron, mg/1
Settleable Solids, ml/1 h/
031 and Grease, mg/1
pH, s.u.
Total Dissolved Solids, mg/1 g/*
Total Phosphorus (as P), mg/1**
(b) Poet-Mining
Effluent Parameter
Flow, MGD
Settleable Solids, ml/1 h/
011 and Grease, mg/1
pH; a.u.
Total Dissolved Solids, mg/1 $/*
Total Phosphorus (as P), mg/1**
Weekly Instantaneous
or Continuous
Monthly Grab
Monthly Grab
Monthly Grab
Weekly Visual f/
Weekly Grab
Quarterly Grab
Quarterly Grab
Measurement Prequency d/ Sample Type e/
Monthly Instantaneous
or Continuous
Monthly Grab
Monthly Visual f/
Monthly Grab
Quarterly Grab
Quarterly Grab
* Total Dissolved Solids monitoring is required only fot 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,
all tributaries to the Dillon Reservoir). See specific facility
certification rationale to determine whether phosphorus monitoring is
required.
•
•
See Part I.B.3. for footnotes •