As part of a large multi-year enhancement program at Reagan National Airport to improve passenger service and relieve congestion at the gates in Terminal B/C, HMMH provided the air quality and noise analysis related to construction activities to support the NEPA document. The Project involves demolition of existing structures and hauling debris off-site, relocating utilities, paving operations as well as construction of a new concourse. The Project will be completed in three phases and the construction schedule is expected to occur over a six year period. HMMH used the EPA MOVES model and EPA Exhaust and Emissions Standards to develop an inventory of criteria pollutant emissions resulting from demolition and construction activities for the Proposed Action. Emission sources considered included: diesel-powered trucks, diesel-powered construction equipment, construction employee vehicles (gasoline), land development, and asphalt paving operations.