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ATTACHMENT TO RIDER <br /> 1. NATIONAL KING COAL MUST MONITOR WATER LEVELS AND WATER QUALITY IN THE <br /> ALLUVIAL AQUIFER OF HAY GULCH ON A QUARTERLY BASIS. THE EXISTING MONI- <br /> TORING WELL WILL BE ADEQUATE FOR THESE PURPOSES ONCE THE FOLLOWING <br /> ITEMS ARE SATISFIED: <br /> A) THE TOP OF THE WELL MUST BE SEALED TO PREVENT SURFACE WATER AND OTHER <br /> DEBRIS FROM ENTERING THE WELL CASING: <br /> B) MONITORING SHOULD ONLY OCCUR ON MONDAY MORNINGS AFTER THE WELL HAS <br /> SET IDLE FOR AN ENTIRE WEEKEND. NATIONAL KING COAL MUST MONITOR FOR THE <br /> FOLLOWING WATER QUALITY PARAMETERS: <br /> PH MAGNESIUM <br /> CONDUCTIVITY SULFATE <br /> TEMPERATURE IRON <br /> TOTAL DISSOLVED SOLIDS MANGANESE <br /> CALCIUM <br /> C) THE RESULTS OF THIS WATER LEVEL AND WATER QUALITY MONITORING SHALL <br /> BE SUBMITTED TO THE DIVISION ON A QUARTERLY BASIS. <br /> 2. NATIONAL KING COAL MUST PREPARE A MASS BALANCE DEMONSTRATION TO CLARIFY <br /> THE INDICATED SOURCES OF MATERIAL TO BE USED TO BACKFILL AND REGRADE <br /> THE SURFACE FACILITIES AREA. SUCH DEMONSTRATION SHALL INCLUDE AN AMENDED <br /> DESCRIPTION OF MATERIAL SOURCES AND TECHNIQUES OF MATERIAL PLACEMENT TO <br /> BE UTILIZED. VOLUME CALCULATIONS SHALL BE COMPLETED DETAILING THE VOLUME <br /> OF FILL REQUIRED AND THE VOLUME OF MATERIAL TO BE OBTAINED FROM EACH SOURCE, <br /> SUCH AS SALVAGE OF EXISTING BENCHES, DEPOSITION OF UNDERGROUND DEVELOPMENT <br /> WASTE AND ROOF FALL, DEPOSITION OF SEDIMENT FROM SEDIMENT PONDS AND THE <br /> DISPOSAL OF DEMOLISHED SURFACE FACILITY DEBRIS. THIS MASS BALANCE EXPLANATION <br /> SHALL BE SUBMITTED TO THE DIVISION WITHIN 60 DAYS FOLLOWING THE ISSUANCE <br /> OF THE APPROVED PERMIT. <br /> FURTHER, NATIONAL KING COAL MUST PREPARE AN APPROPRIATE GEOTECHNICAL AND <br /> STABILITY ANALYSIS OF THE PROPOSED BACKFILLED CONFIGURATIONS FOR THE PORTAL <br /> BENCH AREAS AT THE KING COAL MINE. THESE ANALYSES SHALL UTILIZE ACCEPTED <br /> SLOPE STABILITY MATHEMATICAL ANALYSIS TECHNIQUES, MATERIAL STRENGTH <br /> DETERMINATIONS AND APPROPRIATELY DETAILED GEOTECHNICAL KNOWLEDGE OF THE SITE, <br /> IN ORDER TO COMPLETE THE REQUIRED STABILITY DEMONSTRATION. A REPORT OF THIS <br /> REQUIRED STABILITY ANALYSIS AND THE APPROPRIATE GEOTECHNICAL INVESTIGATIONS <br /> OR OTHER INFORMATION ACCEPTABLE TO THE DIVISION DEMONSTRATING STABILITY, <br /> SHALL BE SUBMITTED TO THE DIVISION FOR APPROVAL WITHIN 120 DAYS FOLLOWING <br /> ISSUANCE OF THE APPROVED PERMIT. <br />