HYDRO27950

• Permit No: C1981047
• IBM Index Class Name: Hydrology
• Doc Date: 3/8/1988
• Doc Name: CDPS GENERAL PERMIT FOR COAL MINING FACILITIES SURFACE RUNOFF ONLY AUTHORIZATION TO DISCHARGE UNDER
• Permit Index Doc Type: NPDES
• Media Type: D
• Archive: No

PART I
Page 4
Permit No. COG-850000
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1. Effluent Limitations
(a) Active Mining
•
B. EFFLDENT LIMITATIONS AND MONITORING REQDIREH$iTS
Effluent Parameter
Discharge Limitations
Mazimum Concentration
30-day avg. a/
Daily Maz. c/
Plow, MGD N/A
Total Suspended Solids, mg/1 35
Total Iron, mg/1 (Eziating Sources) 3.5
Total Iron, mg/1 (New Sources) i/ 3.0
Total Dissolved Solids, mg/1 N/A
(Colorado River Basin Only)
Total Phosphorus (as P), mg/1 N/A
(Dillon Reservoir Drainage Only)
pH shall remain between 6.5 and 9.0 s.u. c/.
Report
70
7.0
6.0
Report
Report
031 and grease shall not ezceed 10 mg/1 c/ nor shall there be a visible sheen f/.
Aay discharge or increase in the volume of a discharge caused by
precipitation within any 24-hour period less than or equal to the
10- ear 24-hour reci station event (or enowmelt of equivalent
volume ~ comply with the following limitations subject to burden
of proof requirements described in Part I.B.l.d).
Effluent Parameter
Daily Mazimum c/
Flow, HGD
Settleable Solids, ml/1 h/
Total Dissolved Solids, mg/1
(Colorado River Basin Only)
Total Phosphorus (ae P), mg/1
(Dillon Reservoir Drainage Only)
pH shall remain between 6.5 and 9.0 s.u. c/.
Discharge Limitations
Mazimum Concentration
Report
0.5
Report
Report
011 and grease shall not a=teed 10 mg/1 c/ nor shall there be a visible sheen f/
. See Part I.B.3. for Footnotes