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Greenhouse Gas CEQA Significance Threshold Stakeholder Working Group #13

Greenhouse Gas CEQA Significance Threshold Stakeholder Working Group #13. August 26, 2009 SCAQMD Diamond Bar, California. Agenda Item #2 – Updated GHG Threshold Analysis for Residential/Commercial Development Projects. Summary of July 29th WG meeting presentation OPR database = 798 projects

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Greenhouse Gas CEQA Significance Threshold Stakeholder Working Group #13

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  1. Greenhouse Gas CEQA Significance Threshold Stakeholder Working Group #13 August 26, 2009 SCAQMD Diamond Bar, California

  2. Agenda Item #2 – Updated GHG Threshold Analysis for Residential/Commercial Development Projects • Summary of July 29th WG meeting presentation • OPR database = 798 projects • After removing GP/MP/SP projects, remaining projects = 738 • Analysis separated residential & commercial projects into separate databases • Mixed use projects separated into their component parts & added to the appropriate database • Did not include office projects

  3. Agenda Item #2 – Updated GHG Threshold Analysis for Residential/Commercial Development Projects (continued) • Analysis separated residential & commercial projects into separate databases (cont.) • 90% emissions capture rate for residential = 8,580 - 9,151 MTCO2e/yr • 90% capture rate for commercial = 2,427 – 3,041 MTCO2e/yr • Staff recommended & WG agreed the analysis should be based only on the OPR database

  4. Agenda Item #2 – Updated GHG Threshold Analysis for Residential/Commercial Development Projects (continued) • Feedback from WG members included: • Need to re-evaluate the largest projects as they might not represent individual projects • Should not separate mixed use projects into their component parts as this does not represent an actual project (economies of scale with mixed use projects – less VTs) • Combine all projects, including mixed use, into a single database • GHG ST threshold should encourage mixed use development

  5. Agenda Item #2 – Updated GHG Threshold Analysis for Residential/Commercial Development Projects (continued) • Additional analysis conducted based on WG comments • Further review of OPR database resulted in removing 27 additional GP/MP/SP projects, remaining projects = 711 • 1st scenario analysis consisted of combining all projects into a single database • Same assumptions as 1st analysis used, i.e., • Construction GHG emissions amortized over 30 years • Direct GHG emissions calculated using URBEMIS • Indirect electricity/water use GHG emissions calculated • Direct & indirect emissions summed & 90th percentile identified • 90th percentile ranged from 2,983 – 3,143 MTCO2e/yr

  6. Agenda Item #2 – Updated GHG Threshold Analysis for Residential/Commercial Development Projects (continued) • 2nd scenario analysis consisted of a residential only plus mixed use residential database • Same assumptions as 1st analysis used • Activated double counting & pass by functions • 90th percentile for residential ranged from 3,310 – 3,596 MTCO2e/yr • 3rd scenario analysis consisted of a commercial only plus mixed us commercial database • Same assumptions as 1st analysis used • Activated double counting & pass by functions • 90th percentile for commercial ranged from 1,390 – 1,481 MTCO2e/yr

  7. Agenda Item #2 – Updated GHG Threshold Analysis for Residential/Commercial Development Projects (continued) • Discussion/considerations for deriving GHG STs for residential, commercial & mixed use project • Develop a single GHG ST be developed based on the 90% capture rate from the combined database? • Develop separate thresholds for residential & commercial? • Develop separate residential & commercial GHG STs, which could be used to develop a weighted GHG ST for mixed use projects based on the GHG contributions from each project • Other recommendations?

  8. Agenda Item #3 – Discussion of Tier 4 Performance Standards Approach • WG members requested staff begin work on the Tier 4 performance standards (PFs) • Initial considerations for developing the Tier 4 – compliance option #1: uniform percent emission reduction target objective • Future projected emissions (construction amortized over 30 years + operational) • % GHG emission reductions

  9. Agenda Item #3 – Discussion of Tier 4 Performance • Future projected emissions • CEQA existing setting (baseline) definition does not change • Same assumptions as the most recently adopted AB32 Scoping Plan • Adopted regulations • Latest planning assumptions • Emission quantification methods

  10. Agenda Item #3 – Discussion of Tier 4 Performance Standards Approach • % GHG emission reduction target • The higher of the following 2 approaches: • Achieve project GHG emission reduction > overall goal of the most recently adopted AB 32 Scoping Plan (currently ~ 30%), Or • Aggregate % GHG reductions from all proposed measures applicable to the source category under evaluation • If GHG emission reduction less than either % reduction target derived from above, GHG impacts are significant • Other approaches? • Discussion

  11. Agenda Items #4, #5, & #6 • Other topics? • Closing remarks • Other business • Next working group meeting scheduled for 9/23/09, 10:00 a.m.

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