Aspen-Pitkin County Airport Greenhouse Gas Emissions Inventory ...

III.1 PITKIN COUNTY OWNED/CONTROLLED EMISSIONSAs noted in Table III-1, Pitkin County Airport Section-related emissions represent 339 metrictons of CO 2 in 2006. Figure III-1 shows the proportion of emissions associated with the PitkinCounty Airport Section.FIGURE III-1Pitkin County Airport Section Owned/ControlledCO2 Emissions (339 tons)Rental Cars0.3%Airport EmployeeCommute (all rds)23.8%Facilities/StationarySources23.7%Hotel shuttles2.0%Passenger vehicles4.4%Ground SupportEquipment45.9%Ground access vehicles - unless noted, only reflects on-airport roadAs this chart notes, the largest portion of greenhouse gas emissions that the County owns andcontrols is associated with energy necessary to power airport support vehicles (ground supportvehicles), ground access vehicles traveling on airport roads, and power associated with airportfacilities.III.2 AIRLINE/TENANT/AIRCRAFT OPERATOR OWNED/CONTROLLED EMISSIONSAirline/tenant/aircraft operator-owned and controlled emissions represent 97.4% of total airportrelatedemissions or 54,931 metric tons of CO 2 in 2006. As would be expected, aircraft representthe single largest source of CO 2 emissions for this category of source ownership at 89% (48,982metric tons of CO 2 ) as shown in Figure III-2. GSE represent the second largest source ofairline/tenant emissions at 10.8% of the airline/tenant/aircraft operator emissions. No tenantinformation was pursued concerning facility of stationary source emissions and no data wasavailable concerning tenant ground access travel with the exception of a limited response fortenant employee data. It is likely that some facility-based power is expended by tenants, andtenant maintenance and industrial activities are conducted with some leaseholds which are notreflected in this inventory. Thus, emissions for the airline/tenant/aircraft operator owned andcontrolled sources are likely to be slightly underestimated.- III-2 - 4/3/2008