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<br />TR-66 2.05 - 41 09/24 <br />The Operator will attempt to monitor quarterly. The samples <br />will be analyzed for pH, conductivity and total settleable solids. <br />Samples will be considered in compliance if they contain total <br />settable solids of 0.5ml/l or less and there is a pH greater than <br />6.5 and less than 9.0. <br /> <br />(iii) Probable Hydrologic Consequences. <br />The probable hydrologic consequences may be divided into <br />surface water and groundwater systems. The effects will be <br />organized as follows: <br /> <br />Effect to surface water from mine facilities. <br />Effect to ground water from mine facilities. <br /> <br /> <br />Surface Water effects - Mine Facilities. <br />Although the potential exists for increased sediment load due to <br />erosion and leaching from coal fines, Rule 4.05.2 requires all <br />surface flow to pass through properly designed sediment <br />control retention ponds. Prior to any discharge from the mine <br />site, effluent is required to meet NPDES standards. After <br />cessation of operations, all surface disturbances will be <br />reclaimed and revegetated. The sediment-control system will <br />remain in place until removal is approved by the DMG. As a <br />result, the increased sediment load from disturbed areas is not <br />expected to reach receiving streams. <br /> <br />Ground Water Effects - Mine Facilities. <br />The North Fork of the Gunnison alluvium as described in <br />Section 2.04.7 will not be impacted as the result of coal mining <br />activities because the permeability of the alluvial aquifer is <br />relatively low due to the high content of clay and silt particles. <br />This low permeability will restrict the downward migration of <br />“salts” that could be leached out of the coal stockpiles and coal <br />fines. Water level and quality data obtained from monitoring <br />wells MW-1 through MW-3, located at the train loadout area, <br />substantiates the prediction. <br />