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-15- <br />Stipulation No. 3 <br />CYCC IS MONITORING WATER QUALITY AT UPSTREAM SITE 18 ON MIDDLE CREEK <br />ACCORDING TO THE SCHEDULE IN TABLE B OF EXHIBIT 15. THE DIVISION DIRECTS <br />THAT THE PERMITTEE ALSO MONITOR WATER QUALITY ON FOIDEL CREEK UPSTREAM OF <br />THE MINE ACCORDING TO THE SAME SCHEDULE. THIS MONITORING SITE MUST BE <br />LOCATED UPSTREAM NEAR THE WESTERN PERMIT BOUNDARY AND MAP 4A MUST BE <br />REVISED WITHIN 30 DAYS OF PERMIT ISSUANCE TO SHOW THE LOCATION. THE <br />MONITORING INFORMATION FROM FOIDEL CREEK SHALL BE INCLUDED IN THE <br />PERMITTEE'S ANNUAL HYDROLOGIC MONITORING REPORT TO THE DIVISION. <br />The applicant also proposes to monitor downstream water quality in Middle <br />Creek at Site 29, which is located approximately one half mile downstream of <br />the confluence with Foidel Creek. The applicant does not propose to monitor <br />surface water flow at this site. Previous stream monitoring records from the <br />Energy Mine No. 3 as well as data from other mines in the area indicate that <br />the concentration of Total Dissolved Solids (TDS) in surface water generally <br />shows an inverse relationship to stream flow. TDS levels are lowest during <br />periods of snowmelt runoff from April through June, and are highest in late <br />summer through winter, roughly from July to March. The most critical time of <br />the year for surface water in relation to use is during the growing season <br />from June through October. Instantaneous flow measurements are needed along <br />with water quality data in order to calculate dissolved salt loading in the <br />stream during this .critical stream flaw period. The following stipulation <br />requires this. <br />Stipulation No. 4 <br />INSTANTANEOUS STREAMFLOW MEASUREMENTS SHALL BE OBTAINED AND RECORDED BY <br />THE PERMITTEE AT THE SAME TIME THAT WATER QUALITY SAMPLES ARE COLLECTED AT <br />SITE 29 ON MIDDLE CREEK AT A t4INIMUM DURING THE MONTHS FROM JUNE THROUGH <br />OCTOBER. THESE FLOW MEASUREMENTS SHALL BE INCLUDED IN THE PERMITTEE'S <br />ANNUAL HYDROLOGIC MONITORING REPORT. <br />The two effluent monitor sites to be included in the hydrologic monitoring <br />plan are Sites 24 and 76, located at the Middle Creek and Mine No. 3 Detention <br />Basins, respectively. Weekly monitoring records from these sites will be <br />reported in the applicant's annual hydrologic monitoring report to the <br />Division as well as NPDES discharge monitoring report which will be submitted <br />quarterly. <br />Surface water quantity and quality in the general area of the Energy Mine <br />No. 3 are subject to temporal variations over relatively short periods due to <br />runoff response to precipitation events, changes in mine discharge rates, <br />changes in air temperature affecting snowmelt runoff volumes, etc. For these <br />reasons it is imperative that water quality samples and water quantity <br />measurements be collected as close in time as is practical at all of CYCC's <br />surface water sampling sites in the Foidel and Middle Creek drainages. This <br />is necessary in order to better understand surface water quality and quantity <br />response in relation to mining in this area. Review of CYCC's surface water <br />monitoring records in this application and for Energy Mines 1, 2, and Eckman <br />