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• CDPH6E - 5 - February 9, 1996 Fugitive emissions caused by hauling from the temporary gob pile to the permanent gob pile were estimated using emission factors from Table 6.24-2. The number of wheels, w, is 10, and the road surface silt loading is 40.8 g/m', the geometric mean found in Table 8.24-3. Uncontrolled emission factors are estimated to be 35.335 lblVMT and 11.583 lblVMT for TSP and PM10, respectively. These result in uncontrolled emissions of 650.17 tons/year TSP and 213.13 tons/year PM10. With a control efficiency of 508 for graveled roads, estimated controlled emissions are 325.08 tons/year TSP and 106.56 tons/year PM10. Uncontrolled emissions estimates for on-site final transport of coal, using emission factors of 260.70 lb/VMT TSP and 90.55 lb/VMY PM10, are 1594 tons/year TSP and 553.75 tons/year PM10. Estimates of controlled emissions are 797.1 tons/year TSP and 276.8 tons/year PM10. Estimated uncontrolled emission factors for employee traffic and service and delivery traffic are also found from Table 8.24-2, light/medium duty traffic, with material moisture content, M, equal to the geometric mean of 1.28 from Table 8.24-3. Uncontrolled emission factors are 2.7922 lb/VMT TSP and 1.234 lb/VMT PM10. The uncontrolled emissions are calculated to be 155.29 tons/year TSP and 68.63 tons/year PM10. For a control efficiency of 508 for graveled roads, the controlled emissions • are 77.64 tons/year TSP and 34.31 tons/year PM10. Total estimated uncontrolled fugitive emissions are 3,021 tons/year TSP and 1,033 tons/year PM10. Controlled fugitive emissions are estimated to be 1,553 tons/year TSP and 521 tons/year PM10. Processing Unit Permit Applications Also enclosed are six APENs and applications for permits for three screens, a rotary breaker, a double roll crusher, and a loadout silo. The throughput rate of the first screen is 1,950,000 tons/year. The uncontrolled emission factors used are 0.10 lb/ton for TSP and 0.028 lb/ton for PM10, as given on page 15 of the July 2, 1984, Tistinic memorandum. A control efficiency of 94.4$ for water spray bars was recommended by R. K. Hancock, III, Public Health Engineer of Colorado Department of Public Health and Environment, in his December 7, 1995, fax letter to our office. Estimated uncontrolled emissions are 195.0 tons/year TSP and 54.6 tons/year PM10, with controlled emissions estimated at 10.92 tons/year TSP and 3.058 tons/year PM10. The same emission factors and control efficiency apply to the remaining two screens. The screen with a throughput rate of • 1,925,000 tons/year has estimated uncontrolled emissions of 192.5 tons/year TSP and 53.9 tons/year PM10. Controlled emissions are estimated to be 10.78 tons/year TSP and 3.018 tons/year PM10.