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RIDER TO MINING PERMIT <br />Permit Date: June 29, 1990 <br />Permit No: C-84-063 <br />The following additional stipulations form an integral part of the foregoing <br />permit: <br />Stipulation No. 1 <br />THE PERMITTEE WILL PERFORM THE MONITORING OUTLINED BELOW AND SUBMIT A <br />HYDROLOGIC MONITORING REPORT ANNUALLY IN JANUARY TO THE DIVISION <br />INCORPORATING THE FOLLOWING MONITORING DATA. <br />SURFACE WATER <br />1. MONTHLY MONITORING OF THE HARVEY GAP RESERVOIR OUTLET AND THE <br />SAMPLE SITE DESIGNATED AS HARVEY GAP BELOW THE MINE (ON MAP HGP-18 ). <br />THIS MONTHLY MONITORING MUST INCLUDE FLOW AND FIELD PARAMETERS. <br />SEMI-ANNUAL SAMPLES ARE TO BE TAKEN FOR THE FULL SUITE CHEMICAL <br />PARAMETERS AS DESIGNATED LATER IN THIS SECTION. <br />2. SEMI-ANNUAL MONITORING OF THE HARVEY GAP RESERVOIR SEEP INCLUDING <br />FLOW AND FIELD PARAMETERS. <br />3. COMPILATION OF ALL DATA SUBMITTED TO THE COLORADO DEPARTMENT OF <br />HEALTH FOR COMPLIANCE WITH THE NP DES PERMIT SAMPLING REQUIREMENTS, <br />INCLUDING SALINITY. <br />GROUND WATER <br />1. CONTINUATION OF INFLOW STUDY AT THE MINE WITH THE SOURCES OF SEEPS <br />MAPPED ONCE YEARLY. FLOWS AND FIELD PARAMETERS SHALL BE SAMPLED AS <br />PRACTICABLE. A HEAVY INFLOW MONTH SUCH AS JULY WILL BE CHOSEN FOR <br />INFLOW MAPPING. ANY NEWLY DEVELOPED SOURCES OF INFLOW THAT HAVE FLOW <br />OF 0.5 GPM OR GREATER WILL BE TESTED ONE-TIME FOR THE FULL SUITE OF <br />CHEMICAL PARAMETERS. <br />2. PUMPAGE RATES FROM THE MINE TO THE SEDIMENT PONDS WILL BE RECORDED <br />WITH THE MINE WATER TESTED QUARTERLY FOR FIELD PARAMETERS AND ONCE <br />YEARLY FOR THE FULL SUITE OF CHEMICAL PARAMETERS. <br />