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04/22/2013 <br /> electricity (in megawatt-hours or MWh) delivered to end users. This factor varies year over year <br /> because PG&E's electricity sources change. For instance, the utility specific emissions factor for <br /> PG&E in 2006 was 455.81 Ibs/MWh whereas in 2008 it was 641.35 Ibs/MWh. For PG&E, the <br /> variance is typically dependent on the availability of hydroelectric resources. During low <br /> precipitation years, there is less water available to generate emissions free hydropower. <br /> Because of this, PG&E must compensate by supplying more electricity generated from natural <br /> gas or coal. <br /> For the 2005 baseline inventory, the 2005 emissions factor was used. For future inventories, a <br /> three-year average emissions factor could be used to address the large variance that may occur <br /> from year to year. <br /> Emissions from natural gas usage are calculated using the emissions factors from the Local <br /> Government Operations Protocol (version 1.0), Tables G.1 and G.3. <br /> 2.2 Transportation Emissions <br /> In 2005, transportation emissions accounted for 49 percent of Redwood City's total emissions. <br /> Travel on local roads accounted for 17 percent (114,370 MTCO2e), travel on state highways <br /> within city limits accounted for 26 percent (175,367 MTCO2e), and emissions from off-road <br /> equipment, such as lawn and garden equipment and construction and industrial equipment, <br /> accounted for 6 percent (39,554 MTCOZe). For off-road equipment, residential lawn and garden <br /> equipment emitted 1,539 MTCO2e, and construction, industrial, and light commercial equipment <br /> emitted 38,015 MTCO2e. Agricultural equipment emissions were not included in this sector. <br /> On-road transportation emissions are based on figures for total VMT for the City of Redwood <br /> City provided by the Metropolitan Transportation Commission (MTC) and calculated from 2005 <br /> California Public Road Data, Highway Performance Monitoring System, State of California, <br /> Department of Transportation and Caltrans GIS data of state highway road segments divided <br /> into jurisdictional segments. Off-road equipment emissions data is calculated from the Bay Area <br /> Air Quality Management District, using EMFAC 2007 as a proxy for unavailable 2005 data. <br /> 35 <br /> RESO.#15258 <br /> MUFF#205 <br />