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<br />Stipulation No. 10
<br />AFTER A THOROUGH REVIEW 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 TO 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 TU BE MONITORED INCLUDE
<br />FLOW, FIELD pH, FIELD ELECTRO-CONDUCTIVITY, FIELD WATER
<br />TEMPERATURE, TURBIDITY, TOTAL SUSPENDED SOLIDS, TOTAL DISSOLVEO
<br />SOLIDS, TOTAL COMBUSTIBLE SOLIDS, TOTAL HARDNESS, TOTAL IRON, TOTAL
<br />MANGANESE, AND PARAMETERS REQUIRED UNDER THE PERMITTEE'S NPDES
<br />PERMIT.
<br />D) ANNUAL MONITORING (NOVEMBER) OF THE PURGATOIRE RIVER UPSTREAM OF
<br />THE MAXWELL MINE, THE PURGATOjRE RIVER BELOW THE CONFLUENCE WITH
<br />CIRUELA CANYON (OLD CHANNEL) AND THE MAXWELL MINE DISCHARGE. THE
<br />PARAMETERS TO BE MONITORED INCLUDE THE FIELD PARAMETERS IDENTIFIED
<br />ABOVE IN THIS STIPULATION, DISSOLVED OXYGEN, TURBIDITY, TOTAL
<br />SUSPENDED SOLIDS, TOTAL COMBUSTIBLE SOLIDS, TOTAL DISSOLVED SOLIDS,
<br />TOTAL HARDNESS, AND TOTAL RECOVERABLE MEASUREMENTS FOR THE IONS
<br />CARBONATE, BICARBONATE, CHLORIDE, SULFATE, AMMONIA,
<br />NITRATE/NITRITE, CALCIUM, MAGNESIUM, POTASSIUM, SODIUM, BORON,
<br />CADMIUM, COPPER, IRON, LEAD, MANGANESE, MERCURY, NICKEL, SELENIUM,
<br />ZINC, SILVER, AND A DETERMINATION OF BAR.
<br />E) ANNUAL MONITORING (NOVEMBER) OF THE PURGATOIRE RIVER ALLUVIAL WELLS
<br />ABOVE AND BELOW THE MAXWELL MINE AND THE CIRUELA CANYON ALLUVIAL
<br />WELL BELOW THE DISPOSAL PILE. THE PARAMETERS TO BE MONITORED
<br />INCLUDE GROUND WATER LEVELS, FIELD pH, FIELD ELECTRO-CONDUCTIVITY,
<br />FIELD WATER TEMPERATURE, TOTAL DISSOLVED SOLIDS AND DISSOLVED IONS
<br />MEASUREMENTS FOR CARBONATE, BICARBONATE, CHLORIDE, SULFATE,
<br />SULFIDE, AMMONIA, NITRATE/NITRITE, CALCIUM, MAGNESIUM, POTASSIUM,
<br />SODIUM, BORON, CADMIUM, COPPER, IRON, LEAD, MANGANESE, MERCURY,
<br />NICKEL, SELENIUM, ZINC, SILVER, AND A DETERMINATION OF BAR.
<br />F) SUBMIT ALL SURFACE AND GROUND WATER MONITORING DATA QUARTERLY.
<br />G) MONITORING REQUIREMENTS MAY BE REDUCED BY THE DIVISION UPON THE
<br />SUBMITTAL OF ADDITIONAL DATA AND A FORMAL REDUCTION REQUEST.
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