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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
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
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
slide3
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
slide4
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
slide5
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
slide6
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
slide7
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?
agenda item 3 discussion of tier 4 performance standards approach
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
agenda item 3 discussion of tier 4 performance
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
agenda item 3 discussion of tier 4 performance standards approach10
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
agenda items 4 5 6
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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