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• Surface Nater <br />Table 73 lists pertinent information on all NPDES, stream, end spring monitoring sites aC <br />the Seneca II Mine. A complete description of the surface water monitoring program may be <br />found on Pages 7-161 to 7-169 of the Seneca II Permit Application Peckege. NPDES <br />Discharge Points 002, 003, 004, and 008 are monitored weekly. Stream Monitoring Sites <br />SW•52-1, 2, 5, end b ere monitored monthly from March through October. All of the NPDES <br />and Stream Monitoring Sites 1, 2, 5, and 6 are setup led three times a year for water <br />quality. The first sample of the year is collected prior to peak runoff (March); the <br />second sample is collected after peak runoff (May or June); and the third sample is <br />collected during base flow conditions (September). Samples collected at all these sites <br />were analyzed using the surface water long list, Table 14 (Appendix A). The two stream <br />monitors on Fish Creek (Sites 11 and 13) and the two on Fish Creek tributaries (Sites 10 <br />and 12), are monitored monthly from May through September, Yhen no flow is observed aC <br />the Cow Camp or Bond Creek sites (Sites 11 and 13 ), the two Fish Creek sites (Sites 10 and <br />12) are not monitored. This year, monitoring occurred at these four sites in May and <br />June. <br />• At the Seneca II Mine, there are four springs (native) that are sampled annually (in May). <br />Ten spoil springs are monitored in the spring season each year after the ground had dried <br />from snowmel t. In addition, Spoils Spring #1 was monitored for the long list concurrently <br />with Site Sw-S2-b, and was monitored biweekly and concurrently with NPDES 004 for flow and <br />field parameters from March to June. <br />Surface water quality data ere presented in Appendix E. Date for each site begins with a <br />flow hydrograph of ell historic date (plus an annual hyd rograph for NPDES sites), followed <br />by a statistical summary of water quality data for the current water year, and then a <br />listing of individual water quality and quantity data for the current water year. Percent <br />milliequivalent values (used to determine water quality type) are presented in Tables 15 <br />through 18. Crest stage gage rating curves are presented in Appendix F. NPDES discharge <br />monitoring reports (OMRS) are presented in Appendix G. Lab samples are handled <br />identically to procedurec discussed previously in the ground water section. For the sake <br />of brevity, the Sw-S2- prefix that precedes all surface water site names will often be <br /> dropped throughout the following text. As an example, Site SW-S2-5 will be referred to as <br /> site 5. <br />9 <br />