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pa bDepartment of Po Air Pollution Control Division <br />Health&Environment Field Inspection Report <br />COUNTY NUMBER: 051 SOURCE NUMBER: 0015 <br />DATE OF INSPECTION: 4/29/2015 <br />COUNTY: Gunnison <br />DATE REPORT SUBMITTED: 4/19/2016 <br />Revised Report Submitted 7/1/2016 <br />INSPECTOR: Ben Cappa <br />COMPANY: Mountain Coal Company LLC — West Elk Mine <br />SITE LOCATION: 5174 Highway 133, Somerset, CO 81434 <br />MAILING ADDRESS: PO Boz 591, Somerset, CO 81434 <br />CONTACT PERSON: Kathy Welt — Env Engineer TIME: 8:30 am <br />TELEPHONE NO.: 970-929-2238 EMAIL: KWelt@archcoal.com <br />PERMIT NO.: 09GU1382,13GU1462,13GU1463, 10GU1130,93GU886.XA <br />SOURCE CLASS: <br />INSPECTION TYPE: <br />HOURS: Travel & Prep: 8 <br />COMPLIANCE STATUS: <br />INTRODUCTION <br />Major ❑ SM -80 <br />Full Compliance Evaluation <br />Partial Compliance Evaluation ❑ <br />Investigation ❑ <br />Inspection: 4 <br />IN COMPLIANCE ❑ <br />Syn Minor ❑ Minor ❑ <br />Onsite Evaluation <br />Offsite Evaluation ❑ <br />Report: 25 Total: 37 <br />OUT OF COMPLIANCE <br />On April 29, 2015, Mr. Ben Cappa, inspector with the CDPHE - Air Pollution Control Division (Division), <br />conducted an announced inspection of the Mountain Coal Company LLC — West Elk Mine (MCC), located in <br />Somerset, CO. Ms. Kathy Welt, Environmental Engineer, escorted Cappa during the inspection and provided <br />facility operational information. Ms. Welt also provided all requested facility records following the inspection. <br />Summary of operations: The facility consists of an underground coal mine, coal storage, handling, crushing, <br />screening, a coal wash plant, coal refuse pile, and a railcar loadout facility. The facility is currently mining the B <br />seam, which is connected to unsealed portions of the previously mined E seam. The source is also rehabbing <br />portions of the F seam as needed. Coal from this mine is considered higher value as it is low sulfur, low ash, low <br />mercury, and high Btu (11,500-11,900 Btu/lb). Much of the facility's coal is shipped via railcar to nearby states <br />for blending with lower quality coal, thus creating a more compliant fuel to be used in electric utility plants. The <br />mine opened in 1982, with approximately 10-15 years of future coal currently leased/permitted. The source <br />reported that there have not been significant facility modifications since the previous inspection in 2012. One <br />modification noted was the replacement of a prep plant screen. Because this is a wet process, this screen <br />replacement does not warrant a permit modification. <br />Longwall mining began at this facility in 1991 (replaced room and pillar mining). The longwall panels that are <br />currently being worked are approximately 1,000' wide and 14,000' long. The current seam being mined is <br />2015 Inspection h <br />051001 S-INSP-2015 Page 1 of 37 <br />