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2. City of Pleasanton 2005 Greenhouse Gas Emissions Inventory 2.1. Methods ICLGI assists local governments in systematically tracking energy and waste related activities within their jurisdiction, and in calculating the relative quantities of greenhouse gases produced by each activity and sector. 'the greenhouse gas inventory protocol involves performing two assessments: I) a comntttnity- wide assessment, and 2) a separate inventory of municipal facilities and activities. The municipal inventory is a subset of the cotnmuttity inventory. Once completed, these inventories provide the basis for policy development, the quantilcation of emissions reductions associated with proposed measures, the creation of an emissions forecast, and the establishment of an informed emissions reduction target. 2.1.1. CPCPSoftveare I'o facilitate community efforts to reduce greenhouse gas emissions, ICLEI developed the Clean Air and Climate Protection (CACP) software package in partnership with the State and "territorial Air Pollution Program Administrators (STAPPA), the Association of Local Air Pollution Control Officials (ALAPCO)~, and "torrie Smith Associates. 'this software calculates emissions resulting fi~om energy consumption and waste generation. The CACP software detet'tnines emissions using specific factors (or coefficients) according to the type of fuel used. CACP aggregates and reports the three main greenhouse gas emissions (COz, CI Ia, and N,O) in terms of equivalent carbon dioxide units, or COze. Converting all emissions to equivalent carbon dioxide units allows for the consideration of different greenhouse gases in comparable terms. Por example, methane (CHa) is twenty-one times more powerful than carbon dioxide on a per weight basis in its capacity to trap heat; so the CACP software converts one metric ton of methane emissions to 2l metric tons of carbon dioxide equivalents. The CACP software is also capable of reporting input and output data in several formats, including detailed, aggregate, source-based and time-series reports. The emissions cocfficicnts and quantification method employed by the CACP software are consistent with national and international inventory standards established by the Intergovernmental Panel on Climate Change (1996 Revised IPCC Guidelines for the Preparation of National Inventories) and the U.S. Voluntary Greenhouse Gas Reporting Guidelines (F,IA form 1605). The CACP software has been and continues to be used by over 400 U.S. cities, towns and counties to reduce their greenhouse gas emissions. However, it is worth noting that, although the software provides Pleasanton with a sophisticated and useful tool, calculating emissions from energy use with precision is difficult The model depends upon numerous assumptions, and it is limited by the quantity and quality of available data. With this in mind, it is useful to think of airy specific number generated by the model as an approximation, rather than an exact value. It should also be understood by policy makers, staff; and the public that the final total may change as new data, emissions coefficient sets, and better estimation methods become available. 2.1.2.O~eatingthe In~entay The greenhouse gas emissions inventory consists of two distinct components: one for the whole community of Pleasanton as defined by its geographic borders, and the second for emissions resulting from the City of Pleasanton's municipal operations. "the municipal inventory is effectively a subset of the community-scale inventory. "Phis allows the municipal government, to track its individual facilities and ~ Now the National Association of Clean Air Agencies (NACAA) ~'I~he potency of a given gas in heating the atmosphere is defined as its Global Warming Potential, or GWP. Iror more information on GWP sec: IPCC fourth Assessmem Report, Working Group 1, Chapter 2, Section 2.10. 2005 Qeenhotse (~s 6rissions Irnentay, Qtyot Flt~a~tat 5