REV13940

• Permit No: M1977342
• IBM Index Class Name: Revision
• Doc Date: 8/4/1995
• Doc Name: RATIONALE FOR PUBLIC NOTICE
• Type & Sequence: AM2
• Media Type: D
• Archive: No

• "PART I µ
Page lc(iv) of 20
Permit No. CO-0041467
A. TERMS AND CONDITIONS
2. Effluent Limitations Discharee Points 002 and 003 (continued)
Beginning July 9, 1996 and lasting until September 30, 1997 the permittee is authorized to discharge from
outfall(s) serial number(s): 002 the combined flows from the Upper tailings pond underdrain, and 003 the
combined flows from the Lower tailings pond underdrain.
Table VI-1 -- Effluent Limits
Parameter
30 Dav Ave a/ Limitation
7 Dav Ave b/
Dailv Max c/
Flow, MGD
October -May Report NA Report
June -July Report NA Report
August -September Report NA Report
TSS, mg/I 30 45 NA
Potentially Dissolved Aluminum, mg/1 1/
Report NA Report
Potentially Dissolved Arsenic, mg/1
October -May 0.40 NA 0.97
June -July 0.98 NA 1.16
August -September 0.50 NA 0.62
Potentially Dissolved Cadmium, mg/l..l/
October -May 0.003 NA 0.010
June -July 0.003 NA 0.007
August -September 0.002 NA 0.006
Potentially Dissolved Chromium VI, mg/1
October -May 0.030 NA 0.043
June -July 0.072 NA 0.105
August -September 0.037 NA 0.054
Potentially Dissolved Copper, mg/1 1/
October -May 0.030 NA 0.042
June -July 0.026 NA 0.033
August -September 0.023 NA 0.029
Total Recoverable Iron, mg/I
October -May 2.5 NA Report
June -July 5.9 NA Report
August -September 3.1 NA Report
Potentially Dissolved Lead, mg/1 1/
October -May 0.012 NA 0.294
June -July 0.005 NA 0.105
August -September 0.006 NA 0.132
amended 05/28/93 effective 07/Ol/93
amended effective