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50 <br />• can be seen for the Argo Tunnel results in Table VI and in <br />Figure 10. The samples were taken over the Spring runoff <br />period to test for variations in concentration with flow. <br />Measurement of flow, conductivity and temperature every week <br />during the spring recharge is a good way to determine the <br />type of aquifer. <br />The reasons for knowing the type of aquifer are quite <br />important. For any diffuse aquifer, the flow will be con- <br />stant and the worry of overwhelming treatment facilities <br />will be minimal. For conduit aquifers, the danger of over- <br />whelming treatment equipment or having amine flood is quite <br />real. Conduit aquifer water is probably unnecessary since <br />diversion procedures could probably be used on the surface <br />above the mine to limit the amount of water entering the <br />aquifer. The flood of the Idorado Mine near Silverton, <br />Colorado in the Spring of 1978 is an example of damage by <br />a conduit aquifer which could possibly have been averted. <br />If the aquifer type is known, then more is known about the <br />earth around the mine. Such knowledge not only helps to <br />control water problems but adds to the knowledge needed for <br />where to open the next adit. <br />TESTS FOR COMPLIANCE TO REGULATIONS <br />The water discharge permit dictates how often discharge <br />water has to be analyzed and for what species analyses have <br />to be made. The important point to understand is that such <br />. a discharge permit is a flexible contract. If the operator