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TABLE 61 <br />KERR MINE AREA HYDROLOGIC MONITORING SCHEDULE <br />WATER QUALfTY -PART 1 <br />Constituent Surtace <br />Discharge <br />Points Alluvial and <br />Groundwater Wells Spoil Water Well <br />Tem erature field M M Q <br />H field M M Q <br />Elec. Cond. field M Q <br />Oil and Grease vis M <br />Settleable Solids M <br />Total Dissolved Solids Q Q <br />Iron Q Q <br />Manganese Q Q <br />Sulfate Q Q <br />Carbonate Q Q <br />Bicarbonate Q Q <br />Potassium Q Q <br />Calcium Q Q <br />Ma nesium O Q <br />Sodium O Q <br />S.AR. Q Q <br />Chloride Q Q <br />Nitrate-Nitro en Q Q <br />WATER QUANTITY -PART 2 <br />Monitoring Facility Measurement Accuracy Weekly/Monthly <br />Surface Discharge <br />Points Flow (Water Depth <br />in Wier or Flume O.D1 ft Weekly/Monthly <br />Sediment Ponds Sediment Level in <br />Pond 0.1 ft Quarterly <br />Alluvial Wells (mine <br />and loadout Water Level in Well 0.1 ft Monthly <br />Ground Water Wells <br />bedrock and coal Water Level in Well 0.1 ft Semi-annual <br />last 2 ears of bondin <br />Spoil Well Water Level in Well 0.1 ft Quarterly <br />Notes: <br />(1) Not monitored at Site 320 <br />• Monthly (M)-monitored monthly during March through October <br />• Quarterly (Q)-monitored quarterly during April through October <br />• Semi-annually-monitoredlwice per year <br />Surtace Discharge Points -Site 301, 302, 303, 304, 305, 321 and 322 (Mine) - 319 and 320 (Loadout) <br />Alluvial Wells- AO-2A (Mine) -AP-1 and AP-2 (Loadout) <br />Ground Water Wells - 79-1, 79-2, 79-3 and 79.61 (all at the mine) <br />Spoil Well - SP-01 (mine) <br />vis =visual check for oiUgrease <br />Note: As of the approval of TR-23, mondoring as scheduled in this table will cease for all wells and surtace water <br />discharge points associated with the mine. Those associated with the Loadout will continue as scheduled. <br /> <br />TR-23 Revised May 2007 <br />