Laserfiche WebLink
• May of 1988 did not appear to be related to mining activity as an elevated <br />concentration was not observed at TR-B (0.04 mg/1) which was immediately downstream <br />of the active mining area. Manganese values from 1999 through 1996 appear to be <br />developing a trend which may be directly related to flow within Trout Creek as are <br />the TDS concentrations. <br />Aluminum/Unionized Ammonia/Nitrite/Orthophosphate <br />Aluminum (Figure 19), unionized ammonia (Figure 15), nitrite (Figure 16) and <br />orthophosphate (Figure 17) were added to the monitoring program in 1988. All values <br />obtained for these parameters have been low with most being below detection limits <br />(Appendix A). The apparent elevated aluminum level shown in May 1995, was due to <br />the laboratory lower detection limit being set at 0.2 ppm instead of 0.05 ppm. <br />Orthophosphate showed some perturbation during the 1990 sampling period. <br />However, concentrations since then have been consistent with pre-1990 levels. <br />Chloride/Potassium/Iron <br />Chloride and potassium (Figure 18) were added to the monitoring program in <br />1993 while iron (Figure 19) was added in 1999. The concentrations of all of these <br />parameters in Trout Creek water are generally low. <br />• <br />• <br />20 <br />