The ASU Research Park, a research partnership complex, does not house any residential, academic, university operations or student involved research activities. The majority of the buildings are owned and operated by entities external to the university.

The CA-CP Campus Carbon Calculator was recommended in the ACUPCC reporting system instructions. The CA-CP tool was also used because of its ease of use by interested parties and it was the tool used for our fy' 06 baseline study.

CA-CP Campus Carbon Calculator's default emissions coefficients.

Inventory data was collected from a wide variety of campus sources for seven primary categories of greenhouse gas emission activities:

• Energy production and use (including purchased and site-generated utilities)
• Commuter transportation (including automobile, bus and shuttle use)
• ASU vehicle fleet usage – fuel purchases
• University Business Travel
• Municipal solid waste production and disposal
• Usage of nitrogen-containing agricultural fertilizers
• Fugitive emissions of halogenated refrigerants

Data collection for each of these categories is discussed in greater detail below.

• Energy production and use

The primary source of ASU’s GHG emissions is the production and use of energy on ASU's Tempe campus, West Campus, Polytechnic Campus and the Downtown Phoenix Campus. These emissions are produced by the combustion of natural gas at Central Plant (CP) and the Combined Heat and Power (CHP) Facility for electricity, steam, and chilled water production, as well as, from the combustion of fossil fuels by Arizona Public Service Company (APS) the utility company providing purchased electricity to that campus. APS or Salt River Project (SRP) power plants supply purchased electricity for all four ASU campuses using coal, nuclear, and natural gas as their primary generation sources. Data collected for this category included the total purchased kWh of electricity from APS or SRP and the total purchased therm of natural gas for use in campus boilers or other stationary sources.

• Commuter transportation

Data collected to determine miles traveled from commuter transportation included total decals sold at each campus and commuter driving patterns and average miles traveled. For the most part, the data was only available for FY2006 and FY2007 projections. Where possible, estimates were either extrapolated from or based directly on 2006 data, when no other data were available. Bus ridership data was available for FY 2006 and 2007. Bus ridership data included total boarding's by city, month, and route, which was used to calculate an average distance traveled by commuters.

• ASU vehicle fleet usage

Data on the ASU vehicle fleet was collected in the form of total usage of gasoline or diesel fuel used in these vehicles.

• University Business Travel

Flight mileage for International Travel was calculated using actual destination data provided by the ASU Travel Office. Specific destinations for regional and out of state travel were unavailable, therefore these areas of travel were calculated by averaging the mileage for the destinations most representative of ASU travel, multiplied by the total number of trips taken. International and National travel includes estimated flight mileage only (omitting ground travel), in-state travel was assumed as ground travel only. This should be considered a place holder only and the information provided will be updated with more complete data in subsequent years.

• Municipal solid waste production and disposal

Municipal solid waste data was collected from monthly municipal solid waste billing records.

• Usage of nitrogen-containing agricultural fertilizers

Fertilizer usage data included type of fertilizer, nitrogen content, and total amount used.

• Fugitive emissions of halogenated refrigerants

Halogenated refrigerants, such as HFCs and HCFCs, are used in chiller operations in the Central Plant and can be released due to leaks or equipment repairs. Data on specific refrigerants and their respective fugitive emissions were provided by ASU Facilities Management and ASU Environmental Health and Safety.

No information provided

Results of this initial inventory are highly contingent on the availability and quality of the data on which emissions calculations are based. In many cases data were not available to provide a complete historical perspective without assumptions or extrapolation. Where multiple years of data were available, they were extrapolated forward or backward where possible.

Business travel data was available on the number and destination of international trips, which could be manually assessed to estimate miles flown. In addition, for regional and national travel, the only information available is number and cost of trips, from which estimated miles were determined.

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A small number of REC’s have been purchased related to new buildings LEED assignments. Any credit related to these purchases has been omitted due to their minimal influence on our overall footprint.

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