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 Environmental
Each year, Massport estimates Logan Airport air emissions through a computer modeling process. In accordance with FAA guidelines for conducting airport air quality analyses, the most recent version of the FAAb s Emissions and Dispersion Modeling System (EDMS) is used to model aircraft emissions. EDMS is the U.S. EPA-preferred, and the FAA-required model for conducting airport air quality analyses. The FAA continually improves the performance, precision and adaptability of the EDMS, and the model is subject to regular updates and revisions. Estimates of ground service equipment (GSE) emissions are based on EDMS emission factors and continue to reflect more accurately Massportb s Alternative Fuels Program, and the conversion of Massport and tenant GSE and fleet vehicles to compressed natural gas (CNG), liquefied petroleum gas (LPG), or electricity. Other model input data are based on an Alternative Fuels Vehicles (AFV) Survey conducted by Massport, and the EPA GSE Emission Factor Model. Motor vehicle emission factor data are obtained from the most recent version of EPAb s MOBILE model combined with Department of Environmental Protection (DEP)- recommended motor vehicle fleet mix data, operating conditions and other Massachusetts-specific input parameters. MOBILE is preferred by the DEP and used throughout the Commonwealth to develop motor vehicle emissions budgets. Emissions associated with the fuel storage and handling facilities, the Central Heating and Cooling Plant, and other stationary sources at Logan Airport are based on annual fuel throughput records, by emission source and fuel type. Appropriate emission factors obtained from the EPA TANKS model are used to determine evaporative fuel emissions. The EPA publication entitled Compilation of Air Pollution Emission Factors (AP-42) and facility-specific data from the individual operating permits are the basis of the stationary source emission factors. The approach used to compute annual air emissions at the airport is based on Federal Aviation Administration (FAA)-, Environmental Protection Agency (EPA)- and DEP-accepted models and the most current versions available. The following sections provide a summary of annual emissions inventory results for Logan Airport activities for volatile organic compounds (VOCs), carbon monoxide (CO) and oxides of nitrogen (NOx) and compares them to the previous annual results since 1999. The emissions inventory is developed using detailed flight activity and actual aircraft fleet mix at Logan. Monitoring data for NO2 are also presented. Additional information on these parameters are provided in the Air Quality Glossary and FAQs. The tables and documents, listed below, are available in PDF format and can be viewed using Adobe Acrobat Reader. If you do not have Adobe Acrobat Reader, see the PDF Help page. VOC Modelled levels of VOC emissions at Logan Airport since 1999 are presented in the chart below. Detailed tabulations of individual VOC emission sources since 1999 are also included. 
CO Estimates of CO emissions at Logan since 1999 are presented in the chart below. Detailed tabulations of individual CO emission sources since 1999 are also included. 
NOX Modeled levels of annual NOX emissions at Logan since 1999 are presented in the chart below. Detailed tabulations of individual NOX emission sources since 1999 are also included. 
NO2 Monitoring Results Massport collects ambient (i.e. b outdoorb ) NO2 concentration data using diffusion tubes at numerous locations on Logan Airport and in neighboring residential communities. The purpose of this monitoring program, which began in 1982, is to track ambient NO2 levels on the airport and to compare the levels to those in the nearby communities and to the National Ambient Air Quality Standards (NAAQS). The results since 1999 are shown in this tabulation. NO2 Monitors Map The locations of the 28 sites currently in the Massport/Logan Airport NO2 monitoring network are shown in this document. |
Introduction
Emissions|
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