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C C <br />-3- <br />• <br />Stipulation No. 9 <br />PRIOR TO THE DISPOSAL OF ANY WASTE MATERIAL (i.e. DEVELOPMENT WASTES, <br />COAL PROCESSING WASTES, REFUSE, ETC.) ON THE ALLUVIUM OF CIRUELA CANYON, <br />THE PERMITTEE'SHALL: <br />A) INSTALL A DOWNGRADIENT MONITORING WELL IN THE ALLUVIUM OF CIRUELA <br />CANYON WHICH IS COMPLETED INTO BEDROCK; <br />B) CONDUCT A PUMPING TEST ON THE ALLUVIUM TO DETERMINE THE <br />PERMEABILITY, TRANSMISSIVITY, AND SPECIFIC YIELD OF THE CIRUELA <br />CANYON ALLUVIUM, UR PROVIDE EXTRAPOLATED INFORMATION FROM SIMILAR <br />ALLUVIAL AQUIFERS; <br />C) COLLECT BASELINE GROUND WATER QUALITY AND GROUND WATER LEVEL DATA <br />ON THE CIRUELA CANYON ALLUVIAL WELL; <br />D) ASSESS THE HYDROLOGIC IMPACTS OF THE DISPOSAL PILE AND DEMONSTRATE <br />THAT THE PROPOSED PILE DESIGN WILL MINIMIZE THE IMPACTS TO THE <br />QUALITY AND QUANTITY OF ALLUVIAL GROUND WATER IN CIRUELA CANYON AND <br />IN THE PICKETWIRE VALLEY. <br />E) SUBMIT THE ASSESSMENT AND DESIGN TO THE DIVISION FOR APPROVAL AS A <br />REVISION. <br />• Stipulation No. 10 <br />AFTER A THOROUGH REUIEW OF THE BASELINE WATER QUALITY DATA, THE <br />OVERBURDEN CHEMISTRY DATA SUBMITTED BY CF&I, AND THE RECEIVING STREAM <br />STANDARDS, THE DIVISION REQUIRES MONITORING TO INCLUDE THE FOLLOWING: <br />A) MONTHLY MONITORING OF THE PURGATOIRE RIVER UPSTREAM OF THE MAXWELL <br />MINE, THE PURGATOIRE RIVER BELOW THE CONFLUENCE WITH CIRUELA CANYON <br />(OLD CHANNEL), AND THE MAXWELL MINE DISCHARGE. THE PARAMETERS TO <br />BE MONITORED INCLUDE FLOW, FIELD pH, FIELD ELECTRO-CONDUCTIVITY AND <br />FIELD WATER TEMPERATURE. <br />B) MONTHLY MONITORING OF THE PURGATOIRE RIVER ALLUVIAL WELLS UPSTREAM <br />AND DOWNSTREAM OF THE MAXWELL MINE, AND MONTHLY MONITORING OF THE <br />ALLUVIAL WELL IN CIRUELA CANYON. THE PARAMETERS 70 BE MONITORED <br />INCLUDE GROUND WATER LEVELS, FIELD pH, FIELD ELECTRO-CONDUCTIVITY <br />AND FIELD WATER TEMPERATURE. <br />C) QUARTERLY MONITORING, (FEBRUARY, MAY, AUGUST, AND NOVEMBER) OF <br />MAXWELL MINE DISCHARGE. THE PARAMETERS TO BE MONITORED INCLUDE <br />FLOW, FIELD pH, FIELD ELECTRO-CONDUCTIVITY, FIELD WATER <br />TEMPERATURE, TURBIDITY, TOTAL SUSPENDED SOLIDS, TOTAL DISSOLVED <br />SOLIDS, TOTAL COMBUSTIBLE SOLIDS, TOTAL HARDNESS, TOTAL IRON, TOTAL <br />MANGANESE, AND PARAMETERS REQUI~tED UIJOER THE PERMITTEE'S NPDES <br />• PERMIT. <br />