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• Currently, no major undisturbed drainage exists within the permit boundary. The Pyeatt drainage was <br />disturbed during the 1988-1992 permit term. The Flume Gulch drainage was impacted with pond <br />construction in Grouse, Sage and Oak Gulches during the 1993-1997 permit term. Mining activities <br />commenced in the Flume drainage during the 1998-2002 term and will continue through the 2003-2007 <br />term. <br />Several changes have occurred to the surface water monitoring program over the years. For instance, <br />acidity was a parameter in our original monitoring scheme, but was determined not to be a meaningful <br />parameter due to the normally alkaline pH values of the surtace water. Acidity was therefore dropped <br />from List A because it dicl not yield useful monitoring information. <br />The frequency of sampling at each site (Table 4.8-11) has been revised to be compatible with Trapper's <br />NPDES permit, C-0032'115. In accordance with TR-48 "1989 Annual Report" approval, the following <br />surtace water sampling changes became effective: <br />1) Vanadium was dropped as a sample parameter in the A-1 list. <br />2) Radium 226 sampling was dropped from the A-1 list. <br />3) Trapper agreed to analyze surface water parameters for "Dissolved" and "Total Recoverable" as <br />specified in permit Table 4.8-12. <br />By March 15 each year, an annual report will be provided to the Division detailing the results of the surface <br />• water sampling at Trapper for the previous year. The report will include data from all the NPDES <br />discharge sites and the ongoing spring monitoring program in effect. Appendix W will be updated to <br />contain each annual report. <br />r1 <br />4-241a <br />Rev'ssicr!. PR-S <br />