Laserfiche WebLink
• 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 current <br />permit 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 surface water. Acidity was therefore dropped <br />from List A because it did 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-0032115. In accordance with TR-48 "1989 Annual Report" approval, the following <br />surface 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 />• Zinc was added as a sample parameter to the A-3 list in Table 4.8-11 with PR-6. <br />By March 15 each year, an annual report will be provided to the Division detailing the results of the <br />surface 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 />• <br />4-241a <br />,evisiart Qe-c <br />Approved. -JJZ( _v2---