Laserfiche WebLink
• Currently, no major undisturbed drainage exists within the permH bountlary. The Pyeatt drainage was <br />disturbed during the 1988-1992 permit term and the Flume Gulch drainage was impacted with pond <br />construction in Grouse, Sage and Oak Gulches tluring the 1993.1997 pernil term. Site S-1 will continue <br />to be used to gather baseline Total Suspended Solids (TSS) and Settleable Solids (SS) data over the <br />nerd several years wRhin the main Flume Gulch drainage. The addil'wnal baseline data collection will <br />ensure sampling represents the full range of baseline values. For example, the surface water monitoring <br />in No-Name (S-5) Gulch observed higher TSS values prior to mining disturbance in this drainage than <br />during mining activity (1981-present). Also, no other baseline SS data exists for any of the drainages to <br />be affected by mining. <br />Several changes have occured to the surface water mon8oring 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. The frequency of monitoring of the Flume site was changed from quarterly <br />to semFannually. This frequency has enabled definition of non-seasonal changes with time. <br />In accordance with TR-48 "1989 Annual Report" approval, the following surface water sampling changes <br />• 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 />speed in permit Table 4.8-12. <br />By March 15 each year, an annual report will be provided to the Division concerning the results of the <br />surface water sampling at Trapper for the previous year. The report will inGude the NPDES discharge <br />sites and data from Flume drainage. Appendix W will be updated to contain each annual report. <br />• <br />4-241a _ PQ-~ ___.._ <br />::.~~~ 1 s'i99a- <br />