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Processing of through the Coal Prep Plant shall not exceed 20,000 tons per day <br />and 4,500,000 ton per year. <br />Hours of operation for maintenance activities on the three main stockpiles limited <br />to 60 hours/day <br />Hours of operation for maintenance activities on the silo stockpiles limited to 40 <br />hours/day <br />Hours of operation for maintenance activities on the refuse piles limited to 75 <br />hours/day <br />After the inspection, the source provided facility records to demonstrate <br />compliance with this Condition (see attached). Records were reviewed for the time <br />period from the previous inspection (Aug 2009) through August 2012. The <br />following includes a summary of those production records as compiled by the <br />inspector, with associated analysis for each permit limit as listed above: <br />Total material handled- The facility did not exceed the daily material handling limit <br />of 59,400 tpd, with the highest recorded values being 51,223 tons (5/2/2011), 52,490 <br />tons (6/12/2011), and 52,257 tons (8/4/2012). Since the last inspection, yearly <br />production has steadily increased, with the highest rolling 12 -month total <br />production of 6,649,431 tons produced from Sept 2011 -Aug 2012. This is below the <br />8,500,000 tpy limit listed above. <br />Total quantity of refuse material- The facility has not exceeded the daily refuse <br />material production limits of 5,000 tpd, with the highest coal prep plant refuse <br />material daily throughput of 3,587 tpd on 11/24/2011. Since the last inspection, the <br />highest 12 -month rolling total of refuse material throughput at this point was 362,722 <br />tpy from Feb 2009 -Jan 2010. This value is below the 1,000,000 tpy limit listed above. <br />Raw material stockpiles have not exceeded 5.1 acres. This is the maximum area of <br />the stockpiles, which are landlocked between the mountainside and an access road. <br />Processed material stockpiles have not exceeded 4.8 acres. This is the maximum <br />area of the stockpiles, which are landlocked between the mountainside and an <br />access road. <br />Processing through the Coal Prep Plant- The facility has not exceeded the CPP <br />processing limits of 20,000 tpd or 4,500,000 tpy. The highest daily processing rate <br />of 17,903 tpd occurred on 5/21/2012. The source records processing on a rolling <br />12 -month total, with the highest throughput of 2,502,641 tpy occurring from July <br />2011 -June 2012. <br />Maintenance activities on three main stockpiles - The source uses a Division - <br />approved method of calculating dozer hours of operation based on historical <br />hours per coal production (see August 2011 O&M Plan Version 02). The highest <br />daily hours of operation on the ROM stockpiles was 50 hours, occurring on several <br />days during the reporting period reviewed. This value is below the 60 hours/day <br />limit. <br />Maintenance activities on silo stockpiles - The source uses a Division -approved <br />method of calculating dozer hours of operation based on historical hours per coal <br />production (see August 2011 O&M Plan - Version 02). The highest daily 'hours of <br />operation' for the silo stockpiles was 9 hours, occurring on 1/31/2011. This value <br />is below the 40 hours/day limit. <br />2012 Air Pollution Inspection <br />0510015-INSP-2012.docx Page 14 of 30 <br />