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i Many trace elements were consistently found to be below the detectable limits for both <br />springs for the 1996 water year. These same trace elements have historically been <br />found to be below detectable limits. They are aluminum, ammonia, arsenic, cadmium, <br />cazbonate, copper, iron, lead, mercury, molybdenum, nitrite, nitrate, nitrate/nitrite, <br />phosphate, selenium, and zinc. The other trace elements tested at a detectable level aze <br />for the most part consistent throughout the water year, with some characteristic <br />variations between the two springs. <br />RESULTS -MONITORING WELLS FOR 1997 WATER YEAR <br />Four wells were sampled during the 1997 water year. The wells sampled were <br />designated 10-B, 17-B, 94-1, and 95-I. Well 10-8 is located approximately 400' east <br />of the northeast rim of the south pit. Sampling of well 10-B was discontinued at the <br />end of calendaz yeaz 1996. Well 17-B is 600' west of the corner of the northwest <br />permit boundary within Cazbon Junction Canyon. Well 94-1 is located adjacent to the <br />east edge of the south pit. Well 95-1 is located approximately 850 feet south-southwest <br />of the future pit boundary. Well 17-B is located upgradient of any disturbance related <br />to mining. Well 94-1 is located within the area disturbed by mining, and well 95-1 is <br />located downgradient and outside the proposed mining disturbance. As such, these <br />wells would be expected to show any changes resulting from the mining disturbance. <br />With one exception, the depth to water for the wells has remained consistent in the <br />1997 water yeaz. During the last quarter of the water year, the depth to water <br />increased from 22 to 64 feet in well 94-1. Further monitoring data will need to be <br />collected to determine whether this is a long term impact or anomalous. The pH for all <br />wells changed from slightly basic during the end of Water Year 1996 to slightly acidic <br />at the beginning of Water Yeaz 1997. During the remainder of the current water year, <br />pH values in the wells elevated to neutral or slightly basic conditions. Well 95-1, <br />which had not been monitored prior to calendar yeaz 1997, showed a similar trend from <br />slightly acidic to slightly basic during the same time period as the other wells. The <br />temperature of the wells is slightly higher in the fourth, second, and third quarters, and <br />lower during the winter quarter. Phis temperature regime could be explained by <br />rechazge from snow melt during the winter months. <br />Many of the trace elements found to be below the detection limits for the springs <br />sampled were also found to be below detection limits for the wells sampled. These <br />trace elements aze assenic, cadmium, mercury, nitrite, nitrate, nitrate/nitrite, <br />phosphate, selenium, and zinc. Other trace elements found at detectable limits aze <br />consistent within each well at levels that do not indicate high or low fluctuations of <br />these elements. Overall, elements that are detectable and those that aze not have been <br />consistent throughout the well sampling program at the Cazbon Junction Mine. Well <br />95-1 illustrated fairly large changes in concentrations of ammonia, bicarbonate, <br />. calcium, chloride, magnesium, manganese, and sulfate between the third and fourth <br />-4- <br />