Laserfiche WebLink
PARTI <br />Page No. 6 <br />Permit No. COG-850000 <br />- -- - - limitations' Monitoring Sample <br />parameter 30-Day 7-Day Daily Rationale Frequency ` Type <br /> Avg Ave. Max. <br /> Federal Effluent Limitation Guidelines Weekly <br />Y Grab <br />Total Suspended Solids, mg/l Report NA Report Federal ELG <br />' Total Iron, mg/1 <br />Existing Sources (before Report NA Report Federal ELG Weekly Grab <br />5/4/84) Report NA Report <br />' New Sources (after 5/4/84) <br /> <br />__Report <br />NA <br />R ort <br />Federal ELG Weekl "Grab <br />Settleable Solids, ml/1 <br />3. Effluent Limitations - Western Alkaline Coal Mining <br />a. Applicability <br />In addition to the requirements under Part I.B.1 above, western alkaline coal mines are subject to 40 CFR Part 434 <br />Subpart H. This subpart applies to alkaline mine drainage at western coal mining operations from reclamation areas, <br />brushing and grubbing areas, topsoil stockpiling areas, and regraded areas, where the discharge, before any treatment <br />has a pH equal to or greater than 6.0; has a dissolved iron concentration less than 10 mg/L; and has a net alkalinity <br />that is greater than zero. The effluent limitations in this subpart apply until the appropriate SMCRA authority has <br />authorized bond release. <br />1. Brushins; and arubbinQ area means the area where woody plant materials that would interfere with soil salvage <br />operations have been removed or incorporated into the soil that is being salvaged. <br />2. Regraded area means the surface area of a coal mine that has been returned to required contour. <br />3. Topsoil stocl ilinQ area means the area outside the mined-out area where topsoil is temporarily stored for use in <br />reclamation, including containment berms. <br />4. Reclamation area means an area that was previously disturbed as a part of the coal mining operation that is being <br />' reclaimed. <br />b. Sediment Control Plan <br />The following items apply to those facilities, and specifically those areas, outlined under Part I.B.2.a above. <br />1. The operator must submit a site-specific Sediment Control Plan to the permitting authority that is designed to <br />prevent an increase in the average annual sediment yield from pre-mined, undisturbed conditions. The Sediment <br />Control Plan must be approved by the permitting authority and be incorporated into the permit as an effluent <br />limitation. The Sediment Control Plan must identify best management practices (BMPs) and also must describe <br />design specifications, construction specifications, maintenance schedules, criteria for inspection, as well as <br />expected performance and longevity of the best management practices. <br />2. Using watershed models, the operator must demonstrate that implementation of the Sediment Control Plan will <br />result in average annual sediment yields that will not be greater than the sediment yield levels from pre-mined, <br />undisturbed conditions. The operator must use the same watershed model that was, or will be, used to acquire the <br />SMCRA permit. <br />3. The operator must design, implement, and maintain BUTs in the manner specified in the Sediment Control Plan. <br />a. Sediment means undissolved organic and inorganic material transported or deposited by water. <br />b. Sediment yield means the sum of the soil losses from a surface minus deposition in macro-topographic <br />depressions, at the toe of the hillslope, along field boundaries, or in terraces and channels sculpted into the <br />hillslope.