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<br />not been degradated 6y contact with the polluted waters <br />• underlying the pond or which might also be seeping through <br />the pond lining. If this occurs, the interceptor drain would <br />no longer represent a diversion of noncontact water and <br />mitigation and permitting would be required. If the <br />interceptor drain flow were contained in a pipe throughout <br />the distance to the discharge point, sampling site no. 28 <br />could be eliminated as the potential for contamination by <br />ground and surface water sources between the present outfall <br />and the Animas River would have been eliminated. <br />Baseline data for the potential discharge from the decant <br />pond might seem to represent a "Catch 22" problem as there <br />would be no representative flows until start up of the mill <br />ne>;t spring. However, Zero Discharge permits are a special <br />case and effluent limitaions would 6e established from <br />e;;isting regulations. Thus the application can be submitted <br />once the sample data from the receiving stream has been <br />obtained. For this case the parameters should include the <br />those included in the standards for segment 3 of the Animas <br />River in the absence of standards for segment 2 (Bob <br />Shuckle, WQCC, verbal communication, 12/12/85). <br /> <br />Operational sampling consists of routine sampling after <br />operations commence. The recommended sites and frequencies <br />are given on Figure No. 13 and in Table No.8. The surface <br />water site no. 33 represents the overflow from the Phase IV <br />emergency pond which might result from abnormal <br />precipitation and is thus an intermittent requirement. Site <br />no. 24, the confluence of the main and east branches of the <br />Animas River probably would not be required by the WQCC; <br />however, the data would 6e helpful to Sultan Mountain Mine's <br />position in the event of a dispute. If an er,cursion to <br />ground water water were to occur, the site(s) should be <br />sampled on a weekly basis to ascertain the effectiveness of <br />the mitigation measures. Down gradient wells should be <br />monitored on a bimonthly basis during this period. If a dawn <br />gradient well does not er:ist, one should be drilled. <br />Table No. 7: Operational Monitoring Program <br />Frequency Surface Ground <br /> Water Water Subtotal Total <br />Monthly 4 1 5 5 <br />Quarterly 2 6 8 13 <br />Biannually 0 5 5 18 <br />Total 6 12 18 18 <br />• <br />-22- <br /> <br />