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the permit application describe the chemical characteristics of soil, <br /> overburden, and the Wadge coal seam. The chemical data indicate no acid- <br /> forming or toxic-forming materials. <br /> E. Surface and Ground Water Monitoring <br /> The applicant will conduct monitoring of ground water in a manner approved <br /> by the Division. The ground water monitoring plan is listed in Table 2.04.7- <br /> T9 (4.05.13(1)): <br /> The applicant will conduct monitoring of surface water in a manner approved <br /> by the Division. The monitoring plan is listed in Table 2.04.7-T-10 <br /> (4.05.13(2)): <br /> F. Probable Hydrologic Consequences <br /> Probable hydrologic consequences of the proposed PSCM mining operation <br /> are discussed in Section 2.05.6(3)(b)(iii) of the permit application. Of the <br /> various probable hydrologic consequences predicted for the PSCM, loading of <br /> streams with salts (mainly calcium sulfate) is considered to be the most <br /> substantial impact. This loading is the continuation of on-going salt-loading <br /> of Little Grassy Creek at Pond 002 from coal spoil leachate that has flowed <br /> into the pond from reclaimed Seneca II Mine surface pits since the pond was <br /> constructed. <br /> Underground activities approved at the PSCM are not predicted to add to the <br /> currently on-going salt loading of surface water, as all water that seeps into <br /> the underground mine workings is either expected to be consumed by dust <br /> control in the workings or is predicted to dilute the water in Pond 002. If all <br /> underground mine water is not consumed in the workings, then the water will <br /> be pumped from the portal area sumps to Pond 002. Table 2.05.6(3) of the <br /> permit application contains a mass-balance mixing calculation of the pumped <br /> underground mine water and the water in Pond 002. The underground mine <br /> water is expected to have a much lower TDS content(approximately 1,050 <br /> mg/1) compared to the TDS content of Pond 002 water(approximately 4,000 <br /> mg/1) because the pillars will not be removed during the proposed mining, <br /> resulting in minimal creation of waste rock(gob) in the workings. The mixing <br /> calculation indicates that, compared to the current water quality of Pond 002, <br /> the pumped mine water will improve the quality of water in the pond and its <br /> discharges to Little Grassy and ultimately Grassy Creek. <br /> Discharges of spoil leachate from the backfilled and reclaimed Seneca 11 <br /> Mine pits are expected to continue indefinitely, with the dissolved solids <br /> content of the spoil leachate declining over a long period of time (possibly <br /> centuries) as the chief source of dissolved solids in the spoil (pyrite) is <br /> exhausted. After underground mining is complete, the workings of the PSCM <br /> 15 <br />