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• <br />Red Canyon Mine - 1997 AHR Page 2 <br /> Total Dissolved Solids (mg/I) Sodium Adsorption Ratio <br /> Measured Predicted Measured Predicted <br />U/S Ward 9/94 60 214 0.67 0.90 <br />UIS Ward 9195 66 214 0.67 0.90 <br />U/S Ward 10/96 78 214 0.69 0.90 <br />U/S Ward 9/97 72 214 0.73 0.90 <br />D/S Ward 9/94 105 214 1.02 0.90 <br />D/S Ward 9195 90 214 0.69 0.90 <br />D/S Ward 10/96 112 214 0.72 0.90 <br />D/S Ward 9/97 112 214 0.96 0.90 <br />This sampling confirms that the Red Canyon Mine has not had an adverse impact on the <br />quality of water in Ward Creek. <br />• The hydrologic monitoring program requires the sampling of springs SP-1 and SP-3 for <br />flow, pH and conductivity twice each year. This monitoring is done to determine if the <br />quality of the springs is impacted by water which could seep into the alluvium from the <br />possibly flooded mine workings. In May and September the field conductivity of SP-1 was <br />790 and 810 uhmos/cm respectively. Both values are higher than the historical average <br />of 734 uhmos/cm but lower than the historic high of 990 uhmos/cm. In May the <br />conductivity of SP-3 was 550 uhmos/cm which is less than its historical average of 591 <br />umhos/cm. In September the conductivity of SP-3 was 640 uhmos/cm which is greater <br />than its historical average of 591 uhmos/cm and less than the historic high of 666 <br />uhmos/cm. The pH of the spring water, both SP-1 and SP-3, is within an acceptable <br />range. <br />The enclosed graph shows that the conductivity of spring SP-1 has consistently been <br />below its historic maximum during the period 1989 through 1996. For Spring SP-3, the <br />enclosed graph shows that its conductivity has generally been above its historic average <br />and below its historic maximum except during 1993 when the measured conductivity of SP- <br />3was about 12% greater 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 upslream <br />monitoring point and SP-DA is the downstream monitoring point on the Carbon Ditch. SP- <br />D is located on the Carbon Ditch at a point that would not be impacted by surface run-off <br />from the mine site. SP-DA is located downstream on the Carbon Ditch at a point that could <br />