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AMENDMENT NO. 2 <br />RATIONALE <br />MOUNTAIN COAL COMPANY <br />WEST ELK MINE <br />FACILITY NUMBER: CO-0038776, GUNNISON COUNTY <br />!I. <br />TYPE OF PERAfIT.• <br />Industrial -Amendment <br />///. <br />I V. <br />FACILITY INFORMATION.• <br />A. Facility Type <br />and Fee Category: <br />B. SIC Nos.: <br />C. Legal Contact: <br />D. Facility Contact: <br />E. Facility Location: <br />F. Discharge Points <br />and Facility Flows: <br />RECEIV/NC STREAM <br />PURPOSE OF AMENDMENT.• <br />Category 2, Subcategory 2 - Coa! Mining: <br />Mine Water and/or Preparation Plant Discharge -Current jee <br />3612Jyear per CRS 25-8-502. - <br />1211 -Bituminous Coal and lignite Mining <br />Gene E. DiClattdio, President <br />Mountain Coal Company -West Elk Mine <br />P.O. Box 591 <br />Somerset, CO 81434 <br />(303) + 929-5015 <br />Kathleen G. Welt, Environmental Supervisor <br />Henry A. Barbe, Environntenta! Coordinator <br />Same address and phone as above <br />SE 1 /4 of Sec. 9, T13S, R90W <br />77tere are nine discharge points jot this permit. <br />See pages 2 and 3 of the previous rationale (November 29, 1989) <br />for additional details on [here discharges. <br />Ident~carion, Class cation and Standards; and Receiving Water: <br />No change from previous renewal rationale; refer to the previous <br />rationale dated November 29, 1989. <br />This amendment addresses the use of cltenticals for treatment at the jaci[iry, a change in the legal and <br />local contacts for the rationale, madhcatians of two existing sediment ponds (including relocation of <br />one pond), and c[ar~ca[ion of chronic WET testing requirements. <br />V. DISCUSSION OF AMENDMENT.• <br />77tis amendment was requested in fetters sera to the Division from the permittee, signed by Henry <br />Barbe, which were doled Sep[ernber 2/, 1993 and Oc[ober I4, 1993, along with ndditionnljased <br />ntateria! received September 27, 1993. This infornuttion addressed the use ojchernical additives in the <br />sedimentntinn ponds at the facility to nsrist in suspended solids removal. <br />These chemicals include: Nalco (Enact} 7883 Liquid (w{tick contains aluminum hydraxyclrloride and <br />aluminum suljateJ, Nalco 7888 Clarification Aid (which contains aluminum hydroxychlorideJ, Nalco <br />8852 Coagulant (nn aqueous sobuiort of n polpquaterrmry amine), and United 657 Zyme-Flox• (nn <br />emvnte-based grease pre-digester, with undesignnted consritnenrs that were identhed as non- <br />haznrdousJ. MSDS sheers for these chenticnls were also submitted by dte permittee. <br />