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7.0 RECOMMENDED GROUND-WATER MONITORING FRE9UENCY <br />Some of the ground-water levels in the Trapper mine aquifers <br />vary significantly during the year. Quarterly monitoring of water <br />levels is needed and recommended to define these changes in the' <br />aquifers. <br />Water quality in the Trapper mine aquifers does not change <br />very fast due to the small rates of ground-water movement. <br />Therefore only the late Spring and early Fall samplings for water <br />quality are recommended. This data should be adequate to define <br />the water quality changes in the aquifers at the Trapper mine. The <br />ash and GLUX-1 wells will continue to be sampled quarterly due to <br />a perceived insufficient time frame in which sampling data has been <br />collected. Contined consistency in data sampling could initiate a <br />• request on Trappers part to decrease sampling frequencies <br />associated with ash monitoring and GLUX-1 well. <br /> <br />7-1 <br />