heavy construction  equipment, on-road vehicles  and off-road vehicles)  and PM$_{2}$.$_{5}$, SO$_{2}$,  GHGs (i.e., CO$_{2}$,  CH$_{4}$, N$_{2}$O)  exhaust  from  the  construction equipment (e.g., bulldozers,  graders,  etc.),  -road  vehicles (e.g., cars, pick -up trucks, vans, etc.) and off -road vehicles (e.g., cemen trucks, dump trucks, etc.). Emissions are based on construction activity schedul number of vehicles/pieces of equipment,  the types of equipment, type of fuel used,  and vehicle/equipment utilization rates.  Non-combustion sources  associated with construction  Evaporative  emissions  resulting  from  activities and operations  asphalt paving operations and (e.g., construction materials  PM$_{10}$, PM$_{2.5 }$and VOC  dust emissions are from staging, demolition, and  materials staging, demolition, earthworks activities, and  and earthworks activities.  asphalt paving operations)  Electrical  Usage 3  The onsite generation of  electricity using coal, oil, or  natural gas.  GHGs (i.e., CO$_{2}$,  CH$_{4}$, N$_{2}$O)  Emissions associated with the  onsite  generation of electricity using coal, oil, or  natural gas.  Refrigerants 3  Compounds used for  refrigeration and air  conditioning.  GHGs (i.e., HFCs,  PFCs and SF$_{6}$)  A range of chemicals  comprised substances  possessing  high  global  warming  characteristics  (e.g.,  F chloroflorocarbons, etc.).  Waste  Management 3  Solid waste generated and  the recycling/waste disposal  practices employed by the  airport.  GHGs (i.e., CO$_{2}$,  CH$_{4}$, N$_{2}$O)  Emissions  associated  with recycling/waste  disp osal  pract i employed by the airport.  $^{1 }$Contributions of CH$_{4 }$ emissions from commercial aircraft are reported as zero. Years of scientific measurement  campaigns conducted at the exhaust exit plane of commercial aircraft gas turbine engines have indicated that CH$_{4 }$emissions are consumed over the full emission flight envelope [Reference:  Aircraft Emissions  of Methane and Nitrous Oxide during the A lternative Aviation Fuel Experiment , Santoni et al., Environ. Sc Technol., July 2011, Volume 45, pp. 7075-7082]. As a result, the EPA published that: “…m ethane is no longer  considered to be an emission from aircraft gas turbine engines burning Jet A at higher power settings and is, in  fact, consumed in net at these higher powers.”  [Reference: EPA,  Recommended Best Practice for Quantifying  Speciated Organic Gas Emissions from Aircraft Equipped with Turbofan, Turbojet, and Turboprop Engines , May  27, 2009 [EPA -420-R-09-901], http://www.epa.gov/otaq/aviation.htm]. In accordance with the statements in the  2006 IPCC Guidelines  (IPCC 2006), the FAA does not calculate CH $_{4 }$emissions for either the  domestic or international bunker commercial aircraft jet fuel emissions inventories. “ Methane (CH$_{4}$) may be emitted by gas turbines during idle and by older technology engines, but recent data suggest that little or no CH 4  is emitted by modern engines.” “Current scientific understanding does not allow other gases (e.g., N$_{2}$O and CH$_{4}$)  to be included in calculation of cruise emissions .” (IPCC 1999).  $^{2 }$Not all HAPs are emitted by these sources. To identify the type of HAP emitted by this source category refer to  the FAA/EPA documents:  Recommended Best Practice for Quantifying Speciated Organic Gas Emissions from  Aircraft Equipped with Turbofan, Turbojet, and Turboprop Engines (Version 1.0), May 2009 [EPA -420-R-09- 901], http://www.epa.gov/nonroad/aviation/420r09901.pdf;  and  Guidance for Quantifying Speciated Organi Gas Emissions from Airport Sources,  Version 1, September 2, 2009,  http://www.faa.gov/regulations_policies/policy_guidance/envir_policy/media/Guidance%20for%20Quantifying%  20Speciated%20Organic%20Gas%20Emissions%20from%20Airport%20Sources.pdf. 3  GHG emissions from these sour ces are strictly related to the “activities” of these sources, and thus considered under the stationary/area source category.  17$_{ }$ Aviation Emissions and Air Quality Handbook 