HYDRO25386

• Permit No: C1992081
• IBM Index Class Name: Hydrology
• Doc Date: 6/22/1992
• Doc Name: FINAL PERMIT COLORADO WASTEWATER DISCHARGE PERMIT SYSTEM CO-G-850008 H-G COAL CO
• From: CDOH
• To: RICHARD G ATKINSON
• Permit Index Doc Type: OTHER SURFACE WATER
• Media Type: D
• Archive: No

PART I
Page 11
Permit No
B. EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
3. Monitoring_Reauirements
COG-850000
In order to obtain an indication of the probable compliance or
noncompliance with the effluent Limitations specified in Part I.B. 1,
[he permittee shall monitor all effluent parameters at the following
frequencies.
a) Active Mining Outfall(s)
Effluent Parameter Measurement Freauencv ~ Samole Tvoe

FLow, MGD Weekly Instantaneous
or Continuous
pH, :;.u. Weekly Grab
Oil :ind Grease, mg/1 Weekly Visual
Tota:L Suspended Solids, mg/1 Monthly Grab
Total Iron, mg/1 Monthly Grab
Sett:eable Solids, ml/1 g/ Monthly Grab
Total Dissolved Solids, mg/1 J* Quarterly Grab
Total Phosphorus (as P), mg/1** Quarterly Grab
b) Post-l:fining Outfall(s)
Effluent Parameter Measurement Freouencx ~ Samole Tvoe

Flow, MGD Monthly Instantaneous
or Continuous
Settleable Solids, ml/1 g/ Monthly Grab
Oil and Grease, mg/1 Monthly Visual J
pH, s.u. Monthly Grab
Total Dissolved Solids, mg/1 ~* 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,
and all ocher tributaries co 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.
u
See Part I.B.4. for footnotes
•