HYDRO29694

• Permit No: C1981047
• IBM Index Class Name: Hydrology
• Doc Date: 6/25/1992
• Doc Name: FINAL PERMIT COLO WASTEWATER DISCHARGE PERMIT SYSTEM CO-G-850009 FORMERLY CO-0033553 MINREC INC
• From: COLO DEPT OF HEALTH
• To: JAMES STOVER
• Permit Index Doc Type: NPDES
• Media Type: D
• Archive: No

PART I
Page 11
Permit No. COG-850000
B. EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
3. Monitorine Requirements
In order to obtain an indication of [he probable comaLiance or
noncompliance with the effluent limitations specified in Part i.3..,
the oermittee shall monitor all effluent parameters ac the following
frequencies.
a) Active Mining Oucfall(s)
Effluent Parameter Measurement Freauencv ~ Samnle T~me di
Flow, MGD Weekly Instantaneous
or Continuous
pH, s.u. Weekly Grab
Oil and Grease, mg/I Weekly Visual
To cal Suspended Solids, mg/1 Monthly Grab
Total Iron, mg/1 Monthly Grab
Settleable Solids, m1/1 g/ ,*fonthly Grab
Total Dissolved Solids, mg/1 J* Quarterly Grab
Total Phosphorus (as P), mg/1** Quarterly Grab
b) Post-Paining Oucfall(s)
Effluent Parameter Measurement Freauencv ~ Samole Twe 3/
Flow, MGD Monthly Instantaneous
or Continuous
Settleable Solids, ml/1 g/ Monthly Crab
Oil and Grease, mg/1 Monthly Visual e/
pH, s.u. Monthly Grab
Total Dissolved Solids, mg/1 ~* Ouarterly Grab
To cal 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.
** Toca1 phosphorus monitoring is required only for discharges co the Di1'_on
Reservoir drainage area (i.e.. Ten Mile Greek, Snake River, Blue River,
and all other tributaries to the Dillon Reservoir; ana for discharges to
the Upper Bear Creek drainage area. See specific Facility cercificacion
rationale co determine whether phosphorus aonitoring is required.
See Part I.B.4. for footnotes