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Ms. Christine Johnston <br />Mountain Coal Company <br />Page 5 <br />August 23, 1996 <br />Please provide an explanation why these required data were not collected or <br />if they are available provide them in a revised report page. <br />15. On page 6 (first paragraph under Groundwater Monitoring) is states that well <br />GP-1 was sampled seven times rather than the minimum scheduled three <br />times per year. This conflicts with Table 4 and the data set contained in <br />Appendix H. If additional analytical data are available for well GP-1 please <br />provide these in a revised report page for Appendix H. <br />16. Table E-4 and Table E-5 in Appendix E are not discussed in text. These <br />tables provide groundwater monitoring data for previous water years. Why <br />is previous water year data provided for only two wells and not the entire <br />monitoring well network. As a suggestion, these tables can be omitted. <br />17. Please explain how samples collected from MB-1 discharge water can be used <br />to characterize the quality of mine inflow water. MB-1 is used to treat <br />surface water runoff, thus, there is substantial mixing of mine water discharge <br />with other surface waters. Mine water quality should be analyzed prior.to <br />discharge to a sedimentation pond. Please refer to the last paragraph on page <br />15 where the report states, "any discharge from ponds would normally be <br />dominated by water quality characteristics of disturbed area runoff'. <br />18. On page 8, the first paragraph under Water Balance states that there <br />appeared to be no groundwater inflow from the "B" or "F" seams that was <br />discharged from the mine. Yet the previous two paragraphs discuss inflows <br />from both the "F" and "B" seams and on the following page it states that <br />"During WY 1993, mine water was discharged into the MB-1". Please revise <br />page 8 to be consistent and correctly account for all mine inflows encountered <br />during WY 1993. <br />19. On page 9 under Mine Water Quality, the text incorrectly references Table <br />4 (this should be Table 5). Please submit a revised report page. <br />20. On page 10, footnote 1 is missing from Table 7. Tf TSS data are available <br />please add them to table 7 and submit a revised report page. <br />21. The estimated sustained mine inflows are missing from the report. On page <br />11, the report states that mine inflows are shown on Table 5. `Table 5 on <br />page 8 shows water quality. Please correct the table and text and submit <br />revised report pages. <br />