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and floating solids is performed in accordance with the terms and frequencies stipulated in NPDES Permit N0. CO-0000221. Flow at Sites NPDES 002 and 003 is monitored continuously through the year via H-flumes with Stevens Type F water level recorders; flow at Sites NPDES 004 and 008 is monitored continuously via Parshall flumes equipped with Stevens Type F water level recorders. The only time of [he year during which floe is not monitored continuously is during the winter months when the stilling wells are frozen. Stream Monitoring Sires SW-52-1, 2, 5, and 6 are monitored monthly for instantaneous flow and field parameters from March through October. Cres[ stage gages are Located at each of the stream sites. All crest stage gages are used to record peak flow stage heights. Peak flows are then calculated by incorporating these peak flow stage values and channel survey data (stream cross section and slope) into the Monolog's Equation. Appendix F of this AHR contains the most recent versions of rating curves developed for the crest stage gages. All of the NPDES and stream monitoring Sites 1, 2, 5, and 6 are sampled three times a year for water quality. The first sample of the year is collected prior to peak runoff (March); the second sample is collected after peak runoff (May or June); and the third sample is collected during base floe conditions (September). Samples collected at alt these sites were analyzed using the surface water long list, Table 14 (Appendix A). Four new surface water sites were added at Seneca II in 1987. Site SN-S2-10 is at the mouth of Cow Camp Creek, Site SN-S2.11 is on Fish Lreek upstream of the confluence with Cou Camp Creek, Site SW-52-12 is at the mouth of Bond Creek and Site SW-S2-13 is on Fish Creek downstream of the confluence with Bond Creek. They were monitored monthly May through September. However, as a result of Technical Revision 20 (approved October 2, 1990), when no floe is observed at the Lou Camp or Bond Creek sites (Sites 11 and 13 ), the two Fish Creek sites (Sites 10 and 12) are not monitored. This year, monitoring occurred at these four sites in May and June. At the Seneca [I Mine, there are four springs (native) that are sampled annually (in May): Springs #1, 2, 3, and 5. They are analyzed using the surface water long List, Per a request by Cathy Begej of the CML RD during the spring of 1990, the nine spoil springs, formerly monitored in September, were monitored in the spring season after the ground had dried from snoumelt. Monitoring consisted of field parameter and flow measurements. In addition, Spoils Spring #1 was monitored for the long list concurrently with Site SW-S2-6, and was monitored biweekly and concurrently with NPDES 004 for flow and field parameters from March to June. 11