T.F. Green Airport Improvement Program - FEIS Chapters - PVD

T.F. Green Airport Improvement ProgramEnvironmental Impact Statement and Final Section 4(f) EvaluationHAPs Emissions InventoryThe HAPs emissions inventory is presented in Table 5-78. For simplification, total Airport-related amounts areshown for each species of HAPs and include emissions from aircraft, GSE/APU, stationary/fueling sources,and motor vehicles.Formaldehyde is expected to occur in the greatest amounts followed by acetaldehyde, acrolein, 1,3-butadiene,and methyl alcohol. This trend is consistent with other findings by the EPA on a nationwide basis. 384 Thesecompounds are emitted in the exhaust of aircraft, GSE/APUs, and motor vehicle engines and, to a lesser extent,from boilers, fuel facilities, and other stationary sources on the Airport.The differences in emission totals between 2015, 2020, and 2025 are attributable to the forecasted increases inAirport operations, changes in ground-based aircraft taxi times, and changes in on- and off-site surface trafficvolumes. However, some increases are offset by the expected reductions in HAPs emissions factors in motorvehicle engine exhaust.Table 5-78No-Action Alternative: Operational Emissions of HAPs (tpy)Compound 2015 2020 2025 Compound 2015 2020 2025Formaldehyde 7.02 7.63 7.99 Toluene 0.68 0.68 0.70Methyl alcohol 0.93 1.02 1.08 Phenol 0.37 0.41 0.44Benzene 2.85 2.73 2.70 N-hexane 0.13 0.11 0.111,1,1-trichloroethane