1. Greenhouse Gas Inventory and Reporting at SLAC National Accelerator Laboratory Kirk Stoddard Air Quality Program Manager June 3, 2009

2. Overview Multi-purpose laboratory –Two-mile linear accelerator –Research in astrophysics, photon science, accelerator and particle physics High demand for electricity –Historical peak is ~50 MW –No onsite generation

3. Summary of Mandatory Reporting Mandatory Reporting Programs –2006: CA Global Warming Solutions Act Five-year implementation schedule: 2007-2012 –2009: California (CARB) SLAC placed in Electrical Sector –2009: Proposed Federal (EPA) Reporting to begin as soon as 2010

4. SLAC Involvement in GHG Inventory & Reporting California Climate Action Registry formed in 2002 –2003-2004: SLAC compiled internal GHG inventory –2008: SLAC joined The Climate Registry Reported data for 2007 (baseline year) Certified baseline to compare future reductions

5. Kyoto GHGs (1997): Global Warming Potentials Carbon Dioxide Methane Nitrous Oxide Hydrofluorocarbons Perfluorocarbons Sulfur Hexafluoride ------------------------------ ?Nitrogen Trifluoride CO 2 = 1 CH 4 = 23 NO 2 = 310 HFC = 140 to 11,700 PFC = 6,500 to 9,200 SF 6 = 23,900 ----------------------------- NF 3 = 17,200

6. Calculating and Classifying Emissions Emissions data are collected for: –Direct Emissions (emitted onsite): Stationary combustion; mobile combustion; other –Indirect Emissions (emitted offsite): Purchased electricity –Voluntary Reporting: Commuter travel, air travel Non-Kyoto GHGs, ODSs, et al.

7. Direct Emissions from GHG Sources Fuel Combustion: CO 2, CH 4, NO 2 –Cars, trucks, heavy equipment –Boilers, generators Electrical Insulation: SF 6, HFC, PFC –Circuit breakers, switchgear –Particle detectors Refrigeration: HFC –Chillers

8. Data Entry and Data Validation Conversion Factors Emission Factors Levels of Detail –Fleet vehicles Defaults available Use actual data, if you can! Third-party verification (TPV)

9. SLAC GHGs: CY07 Breakdown Electricity (indirect) HFC / PFC Natural Gas SF 6 Purchased Fuel Purchased CO 2 Biodiesel 2007 TOTAL: 136,918 11,591 3,124 976 370 5 <1 152,984 MTCO 2 e* * Metric tons of carbon dioxide equivalents

10. SLAC GHG Emissions for 2007 (MTCO 2 e)

11. Practical Tips Utilize all data sources –Take advantage of all available utility meters to facilitate mass-balance calculations for energy usage –Use purchasing records and chemical management system as leading indicators of GHG use, if feasible –Consider portable scale to track gas use

12. Practical Tips, continued Note trade-offs between ODS and GWP Be aware of ‘new’ GHGs (e.g., NF 3 ) Identify emissions reduction measures that are easy, quick, and/or cheap –Survey for SF 6 leaks –Recover and re-use SF 6