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a, reference to map showing the small area exemption; <br />b. details of control measures used; <br />c. acreage figures, not to exceed about 2 acres for each area; <br />d. a description of the activities to be conducted within the exempted <br />area; <br />e. a discussion of why it is not feasible to pass the runoff through a <br />sedimentation pond; <br />f. a demonstration that applicable water quality standards are met; and <br />g. a demonstration that the i0-year, 24-hour precipitation event will <br />be contained. <br />Small area exemptions are granted under Rule 4,05.2(3) and must comply <br />with effluent limitations of Rule 4.05.2 and the applicable State and <br />Federal water quality requirements for downstream receiving waters. <br />23. Rill and Gully Plan <br />Section 4.14,6 of the permit application, page 4.14-2, describes a rill <br />and gully plan. The plan does not indicate that all gullies will be <br />filled and regraded, Bear Coal must commii to filling and regrading of <br />any gullies in compliance with Rule 4.14,6, <br />24. Stock pond Location <br />Are there any stock ponds overlying the mine in Section 17? Drawing <br />2.04.7(2)(a)-1 was adapted from a figure in the ARCO permit document. It <br />is not obvious whether ARCO looked for stock ponds outside their permit <br />area. Please revise the drawing if appropriate (Rule 2.04.7(4)(d)). <br />Groundwater Hydrology <br />25. Groundwater Monitoring <br />Bear Coal asserts that there is no groundwater of any yield within their <br />permit area as evidenced by the lack of seeps, the xeric nature of their <br />mining in the C and B-seams and the dry, non-draining condition of the <br />Edwards Mine, a historical mining operation in the vicinity of the Mine <br />No. 3 portals, in which mining of the B and C seam occurred. While this <br />evidence is qualitatively persuasive, it does not allow the Division to <br />make quantitative projections on impacts from mining. <br />The presentation of groundwater baseline water quality in a permit <br />application is regulated by 2,04.3(1) and 2.04,7(1). These rules require <br />a description of physical and chemical characteristics of all aquifers <br />within the overburden down to and including the aquifer below the coal <br />seam. In addition, the Division has prepared guidelines for baseline <br />data collection which recommend twelve monthly water level readings as <br />well as semi-annual water quality evaluations. <br />-8- <br />