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.. ~ ,. <br />ATTACHMENT TO RIDER <br />1. NATIONAL KING COAL MUST MONITOR WATER LEVELS RND WATER QUALITY IN THE <br />RLLWIRL 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 />R) 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 RN 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 R QUARTERLY BASIS, <br />2. NATIONAL KING COAL MUST PREPARE R MASS BALANCE DEMONSTRATION TO CLARIFY <br />THE INDICATED SOURCES OF MATERIAL TO BE USED TO BACKFILL AND REGRADE <br />THE SURFACE FACILITIES RRER. SUCH DEMONSTRATION SHALL INCLUDE RN 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 RS SALVAGE OF EXISTING BENCHES, DEPOSITION OF UNDERGROUND DEVELOPMENT <br />WASTE AND ROOF FALL, DEPOSITION OF SEDIMENT £ROM SEDIMENT PONDS AND THE <br />DISPOSAL OF DEMOLISHED SURFACE FACILITY DEBRIS. THIS MASS BALANCE EXPLANATION <br />SHALL BE SUBMITTED TO THE DIVISION [dITHIN 60 DAYS FOLLOWING THE ISSUANCE <br />OF THE APPROVED PERMIT. <br />FURTHER, NATIONAL KING COAL MUST PREPARE RN APPROPRIATE GEOTECHNICAL AND <br />STABILITY ANALYSIS OF THE PROPOSED BRCKFILLED 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 CEOTECHNICAL 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 />