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CONSOLIDATION COAL COMPANY PROPOSED BUCHANAN NO. 1 MINE WATER DISCHARGE

Comments/Questions. Comments? Go to the Art Room, where you may submit comments for the record on the proposed application.Questions? Go to the two information stations to ask any questions that you might have or to review maps.Written comments accepted until June 7. . Proposal Overview

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CONSOLIDATION COAL COMPANY PROPOSED BUCHANAN NO. 1 MINE WATER DISCHARGE

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    1. CONSOLIDATION COAL COMPANY PROPOSED BUCHANAN NO. 1 MINE WATER DISCHARGE PRESENTATION FOR THE INFORMAL PERMIT CONFERENCE ON APPLICATION NO. 1002883 PERMIT NO. 1400047

    2. Comments/Questions Comments? – Go to the Art Room, where you may submit comments for the record on the proposed application. Questions? – Go to the two information stations to ask any questions that you might have or to review maps. Written comments accepted until June 7.

    3. Proposal Overview Buchanan mine water proposed discharge ranges from 384 GPM - 10,000 GPM over next 17 years This discharge rate represents a 1.5% to 2.8 % increase in the flow rate of the Levisa. During low flow periods (estimated to occur 26% of the time annually), no discharge will occur Parameter of concern is chloride (Avg 6,907 mg/l)

    4. Proposal Overview Cont’d Plan to fill VP-8 and VP-3 and use a controlled discharge to Levisa Fork using a complete mixing zone related to chlorides Discharge location downstream of Grundy (Poetown) Mixing zone modeled using Cornell Mixing Zone Expert System (CORMIX) Version 4.3

    5. Proposal Overview Cont’d CORMIX is a software system for the analysis, prediction, and design of pollutant discharges into diverse water bodies. It was developed under cooperative funding agreements between U.S. EPA and Cornell University. It is a recommended analysis tool in key guidance documents on the permitting of industrial, municipal, thermal, and other point municipal discharges to receiving waters

    6. Other Alternatives Considered Treatment using reverse osmosis (RO) or electrodialysis: The efficiency is such that 25 to 30 percent of the mine water volume would remain and have elevated total dissolved solids (approximately 45,000 to 50,000 mg/l). This waste water would then need to be sent to an evaporator for further concentration of the total dissolved solids into a range of 200,000 to 250,000 mg/l. The effluent from the evaporator would be sent to a crystallizer to create a solid waste. The pretreatment waste (reduced to semi-dry sludge using a belt press) and crystallizer wastes would require disposal in a permitted solid waste facility. These wastes would be hauled by trucks to a suitable waste disposal facility.

    7. Other Alternatives Considered Cont’d Deep well injection: Due to the high volume of Buchanan mine water, based on brine water injection wells a large number of low yield deep wells would be required along with an extensive network of pumps and water lines resulting in substantial surface disturbance Recirculation through slurry impoundment and prep plant: In comparison to the volume of the Buchanan mine water, evaporation at the slurry impoundment would do little to reduce the quantity of water. Similarly, routing the mine water through the prep plant would reduce the volume of water by only 20% with adverse effects on the life of the prep plant

    8. Levisa Fork in the segment near Grundy, VA has been determined by DMME and the Virginia Department of Environmental Quality (DEQ) to meet the requirements for a Tier 1 stream. Tier 1 specifies that existing in-stream water uses and the level of water quality to protect the existing uses shall be maintained and protected. This means that as a minimum, all waters should meet adopted water quality standards. Tier 1 streams are allowed to have mixing zones

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