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Red Canyon Mine - 1996 AHR Page 2 <br />`~`~~ ~'` ~`~'-~"' - ""' Total Dissolved Solids m Sodium Adso lion Ratio <br /> <br />~-~''*<=~~%-~<'?<<~i;:;;:,~ Measured Predicted Measured Predicted <br />U/S Wazd 9/94 60 214 0.67 0.90 <br />U/S Ward 9/95 66 214 0.67 0.90 <br />U/S Wazd 10/96 78 214 0.69 0.90 <br />D/S Ward 9/94 105 214 1.02 0.90 <br />D/S Ward 9/95 90 214 0.69 0.90 <br />D/S Ward 10/96 112 214 0.72 0.90 <br />This sampling confirms that the Red Canyon Mine has not had an adverse impact on the quality <br />of water in Ward Creek. <br />The hydrologic monitoring pmgram requires the sampling of springs SP-1 and SP-3 for flow, pH <br />and conductivity twice each year. This monitoring is done to determine if the quality of the <br />springs is impacted by water which could seep into the alluvium from the possibly flooded mine <br />workings. in May and September the conductivity of SP-1 was 830 and 780 uhmos/cm <br />respectively. Both values are higher than the historical average of 734 uhmos/cm but lower than <br />the historic high of 990 uhmos/cm. Tn May the conductivity of SP-3 was 620 uhmos/cm which <br />is higher than its historical average but less than the historical high of 666 uhmos/cm. in <br />September the wnductivity of SP-3 was 580 uhmos/cm which is less than its historical average <br />of 591 uhmos/cm and much less than the historic high of 666 uhmos/cm. The pH of the spring <br />water, both SP-1 and SP-3, is within an acceptable range. <br />The enclosed graph shows that the conductivity of spring SP-1 has consistently been below its <br />historic maximum during the period 1989 through 1995. For Spring SP-3, the enclosed graph <br />shows that its conductivity has consistently been above its historic average and below its historic <br />maximum except during 1993 when the measured conductivity of SP-3 was about 12% greater <br />than it historic maximum. <br />The hydrologic monitoring program provides for monitoring to determine if run-off from the <br />mine site has any impact on the water quality in the Carbon Ditch. SP-D is the upstream <br />monitoring point and SP-DA is the downstream monitoring point on the Carbon Ditch. SP-D is <br />located on the Carbon Ditch at a point that would not be impacted by surface run-off from the <br />mine site. SP-DA is located downstream on the Carbon Ditch at a point that could be impacted <br />• by surface run-off from the mine site. Both points are monitored during May and September for <br />field parameters and total suspended solids, (TSS). Tn May the TSS for SP-D and SP-DA was <br />