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2) Table 2-1 outlines water quality parameters for surface <br />water and alluvial groundwater. Total metal analyses are <br />prescribed. However, the groundwater samples should be <br />sampled for dissolved metals rather than total. Please <br />make the appropriate correction. <br />3) On page 6 of the AHR, WFU notes that TDS concentrations <br />in Qal-5 appear to be on the decline. Does WFU have any <br />thoughts on why TDS levels are declining in the alluvium? <br />4) In Table 2-2, which is a statistical summary of water <br />depth in bedrock holes and Qal-5, some of the wells which <br />were required to be monitored quarterly had only 3 <br />readings. Please explain. <br />5) Pages 8 and 9 of the AHR describe drops in bedrock water <br />levels observed as a result of mining. The PHC section <br />of the PAP should be updated to include the observed <br />water level drops and predict future effects. <br />6) On page 8, mention is made of an observed water level <br />drop in well 2-7U, but no mention is made of the <br />magnitude of the drop. Please expand. <br />7) On the top of page 9, mention is made of a drillhole <br />being mined through in the vicinity of well 36-2U and of <br />the subsequent seepage into the mine of 0.25 gpm and <br />observed water level drops in 36-2U. Has WFU made any <br />attempt to seal off the drillhole? <br />8) In Table 2-4 of the AHR, it would be helpful to include <br />high and low concentrations observed during the water <br />year ..especially in discharge point 026 which has <br />historically had problems with elevated TDS levels. <br />9) Both the 1993 and 1994 AHRs mention that WQCD sent an <br />effluent sample and prior toxicity reports to the EPA <br />laboratory in Duluth to investigate the cause of toxicity <br />in some of the discharges at the Deserado Mine. In both <br />reports, WFU states that it believes WQCD has not heard <br />from the EPA regarding this matter. Is there any new <br />information in this regard since the AHR was written? <br />Has WFU checked with WQCD or EPA to find out the results <br />of their investigation? <br />Please respond to the above concerns. If you have any questions, <br />please call me at (303) 866-3567 X320. <br />Sincerely, <br />~~~-- <br /> <br />Barbara L. Pavlik <br />Environmental Protection Specialist <br />