Potential emissions are different from actual emissions Generally potential emissions are the maximum emissions that would result from operating the facility at full capacity 24 hours a day 365 days a year taking into consideration federally enforce ID: 82695
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�� General Guidance for Air Construction Permits��Page of te: /201, Revision: Discussion of Potential to Emit Permit type is largely dependent on the potential emissions (or the potential to emit (PTE)) of the https://www.epa.gov/airemissions factorsandquantification/apcompilationairemissionfactors . The PTE calculation takes into account reductions achieved by the use of control devicesand �� General Guidance for Air Construction Permits��Page of te: /201, Revision: Example PTE Calculation Determining the PTE for nitrogen oxide (NO) emissionsfrom a 50 million Btu per hour (MMBtu/hr) natural gasfired boiler. Maximum hourly design rate (MHDR) = 50 MMBtu/hremission factor from AP42 = 100 pounds (lbs) of NOemitted per million cubic feet (MMft) of natural gas burned Heating value of natural gas = 1,050 Btu/ftof natural gasConvert MHDR units = (50 MMbtu/hr)/(1,050 Btu/ftof natural gas) = 47,619 ftof natural gas/hr Annual operating hours = (365 days/year)*(24 hours/day) = 8,760 hours/year (Note:Annual operating hours is always 8760 hours per year;it does not represent the actual or expected hours of operation.)Annual natural gas usage = (8760 hr/yr) * (47,619 ftof natural gas/hr) = 417.14 of natural gas/year Annual NOPTE = (417.14 MMftnatural gas/yr) * (100 lbs NO/yr) = (41,714 lbs of /yr)/(2,000 lbs/ton) = 20.86 tons NO/year