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2.05.6(3) Protection of the !1 drologic Da lance <br />1. The application should contain a detailed description of the measures <br />to be taken to ensure the protection of the hydrologic balance. As stated <br />previously in Section 2.09.7, this begins with adequate baseline data. <br />Unless this information is available, one cannot identify discern or <br />attribute affects or impacts to the hydrologic system {page ZV-71). <br />(See the evaluation of the monitoring plan, presented as Attachment C to <br />this summary) <br />2. Although the applicant has supplied sections pertaining to control <br />and monitoring of tfie hydrologic regime, some items are missing and <br />there are some discrepancies. ' <br />a. The report on general water in forma tio;~, Appendix IIZ-2 is <br />incomplete; it ends in mid-sentence. <br />b. The rasps referenced in the report mentioned above, III-2, N89-0002A <br />and N81-00010, are missing. These maps should be included in the <br />application. <br />c. In addition, the water monitoring sites referenced on page ZV-81 <br />and 82, R1 through R4, TC1, TC2, TMI and ~fZ, are not located on <br />map IV-13. Also, locations of previous sampling sites, appendix ZZI-12, <br />must be located on a map as well. These items must be corrected. <br />d. The tables referenced on pages Iv-84 and 83 are assumed to be <br />Tables IV-6 and 7 not IV-4 and S. This discrepancy needs to be <br />clarified. <br />e. The NPDES permit in Appendix II-3 expired in 1979 and does not <br />include all of the sites Empire said it was monitoring, Map IV-13. <br />All current, accurate NPDES permits must be provided. <br />f. The monthly groundwater monitoring should include; temperature, <br />pH and conductivity. <br />3. The applicant has made statements that must be supported by scientific <br />data. <br />a. On page III-54 the applicant asserts that mine water cannot <br />migrate into underlying or overlying aquifers due to differential <br />pressures. Experimental proof must be supplied that water cannot <br />migrate down dip in mine workings. <br />b. Documentation must Le provided which states that .interburden <br />materials will flow and seal fractures that result from subsidence <br />(page III-58). <br />c. The accuracy of the statements that, "potential dewatering will <br />occur only in the coal seams and the upper 22 to 50 feet in caved areas" <br />and "only in areas of subsidence 'ZV-72"' will be determined by monitoring <br />of the aquifer. <br />-11- <br />