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PART 1 Page iii Permit No. CO-0043645 PART I A. TERMS AND CONDITIONS Effluent Limitations Beginning no later than the effective date of this permit and lasting through Decattber 31, 1999, the permittee is authorized to operate under the terms and conditions of this permit. The following points have been specifically identified for monitoring purposes: OOlA Arequa Gulch at Station AG-1.5 (for use when no stormwater is present) - OO1B Arequa Gulch at Station AG-1.5 (for use when stormwater is present) 002A Pregnant Solution Storage Area Leak Collection and Recovery System (PSSA-LCRS) 003A Ore Storage Area Leak Detection System (OSA-LDS) 004A Springs forming Arequa Gulch within Arequa Gulch Rock Storage Area OOSA Non-Spring Seepage from Arequa Gulch Rock Storage Area (does not include stormwater), At Discharge Into Diversion Ditch Surrounding the Valley Leach Facility 006A Non-Spnng Seepage from Arequa Gulch Rock Storage Area, Mixed With Stormwater, At Discharge From Diversion Ditch to Arequa Gulch Below the Valley Leach Facility 007A Discharges From the Valley Leach Facility That Qualify for Annual Precipitation or Storm Exemptions In accordance with the Water Quality Control Commission Regulations for Effluent Limitations, Section 10.].3, and State Discharge Permit System Regulations, Section 6.9.2, 5 C.C.R. 1002-2, the permitted discharge shall not contain effluent parameter concentrations which exceed the following limitations specified below or exceed the specified flow limitation. a. "No Discharge" Linutation Except as allowed under the exemptions described in sections Part I.A.1.6. and c., the Cresson Mine cyanide heap leach operation, including all ancillary facilities located within the boundaries of the project area, may not result in a point source discharge of process water or combined process water/stotmwater to surface waters of the State. In addition to any immediate notifications required under the exemptions listed below or the spill provisions of the permit, and the submittal of monthly discharge monitoring reports (DMR's), the permittee shall submit an annual report each year, as described in detail ta Part I.E.3.c. of [his permit, and must demonstrate in that report that no discharge of process water has occurred. Such demonstration may incorporate the analysis of Flows, pollutant concentrations or pollutant loadings. Should the permi[tee be unable to provide such a demonstration, or the Water Quality Control Division determine that any discharge of process water has or ma}• have occurred, the permit may be reopened in order to modify its [erttis and conditions so as to further evaluate or to control the discharge. INDBP +rVF)