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• compazable trend with the 1995-2001 range being 1100-1480 mg/L and the recent values ranging from 1700 to 2200 mg/L. This water year Spring 3 values averaged 1850 mg/L, reduced from the higher levels of the prior two water years. Likewise, Spring 4 concentrations this year were 1500 mg/L, signiflcantly lower than the prior two water years. Trace Elements Many trace elements were consistently found to be neaz or below the detectable limits for all springs for the 2005 water year. These same trace elements have historically been found to be at or below detectable limits. They aze ammonia, arsenic, cadmium, iron (dissolved}, mercury, nitrite, nitrate, nitrate/nitrite, phosphate, selenium, and zinc. RESULTS - MONTTORING WELLS FOR WATER YEAR 2005 Two groundwater monitoring wells were sampled during the 2005 water year. The wells sampled aze designated 17-B and 95-1. Well 17-8 is 600 feet west of the corner of the northwest permit boundary within Carbon Junction Canyon. Well 95-1 is located approximately 850 feet south-southwest of the future pit boundary. Well 17-B is located upgradient of any disturbance related to mining. Well 95-1 is located downgradient and outside the proposed coal mining disturbance. As such, well 95-1 would be expected to show any changes resulting from mining disturbance. Well 95-1 may also reveal changes • to groundwater due to adjacent sand and gravel mining and reclamation activities on Ewing Mesa. Wells 17-B and 95-1 were sampled once in the second water yeaz quarter (April 14, 2005). Field parameters were obtained for Well 17-B in December 2005, but CDS personnel could not Locate Weil 95-1 at that time. Summaries of sampling data from the groundwater wells for the 2005 water yeaz are contained in Tables 4, and 5. Depth to Water After slight to significant water level increases in all wells during the winter of 2000-2001, depth to water levels have returned to prior historic ranges. Water Temperature Water temperature in the wells fluctuates regulazly with the seasons. Water temperatures are generally lowest during the winter months and highest during the summer months, though the temperatures respond to ambient weather conditions during the season. Temperature generally fluctuates most in the shallowest well (17-B) and least in the deepest well (95-1). Temperature ranges for the 2005 water yeaz remained within those observed previously for the wells. • Carbon Junction Mine Page B Mnual Hydrologic Report far Water Year 2Wti