1. Measuring Progress Towards GHG Reductions Presented by: Stefan Unnasch
TOWN OF PORTOLA VALLEY
Green Building Forum
5 April 2008
Corte Madera School
Portola Valley, CA

2. (c) 2008 Town of Portola Valley
Outline
Goals and Objectives
Climate Action Initiatives and Targets
Measuring GHG reductions
Potential GHG reduction measures
12/2/2018
(c) 2008 Town of Portola Valley

3. (c) 2008 Town of Portola Valley
Goals and Objectives
Develop 1990 baseline
Calculate emissions for 2005 and beyond
Estimate GHG reductions
Examine emission reduction measures
12/2/2018
(c) 2008 Town of Portola Valley

4. Climate Action Initiatives
Impact
Targets
Kyoto Protocol
International GHG Trading
1990 base year
7% reduction by 2012
CA AB32 1
CA GHG Cap and Trade program
1990 levels by 2020
80% reduction by 2050
106 solar homes
Displaces grid power
106 rooftops by 20xx
CA AB1493
CA Vehicle GHG emission standard
20% reduction (per mile) by 2012 from 2008 baseline
CA Low Carbon Fuel Standard
CA transportation fuel carbon intensity
2004 base year
10% by 2020, 80% by 2050
CA AB1007
California fuels plan
Full fuel cycle analysis
No net material increase in emissions
CA Renewable Portfolio Standard
New renewables for electric power
33% by 2020 for IOUs
1Exec Order S-3-05: CA returns to 2000 levels by 2010, 1990 levels by 2020, 80% below 1990 by 2050.
2050 target adopted by Portola Valley Town Council 
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(c) 2008 Town of Portola Valley

5. (c) 2008 Town of Portola Valley
Data Collection
Building Stock (Utility Data)
Vehicle Fuel Use
Other environmental impacts have less GHG impact
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(c) 2008 Town of Portola Valley

6. (c) 2008 Town of Portola Valley
Data Collection
PG&E Data
Additional data and analysis is needed for Town government and schools
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(c) 2008 Town of Portola Valley

7. PV Baseline GHG Inventory
See detailed report for assumptions and emission factors
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(c) 2008 Town of Portola Valley

8. Major Residential Building Activity
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(c) 2008 Town of Portola Valley

9. GHG emissions over time
What about state measures?
Additional local efforts?
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(c) 2008 Town of Portola Valley

10. Town and Resident Measures
Vehicles and Fuels
Buy carbon efficient vehicle
Drive less
Efficient hauling
Homes
Lighting, weather stripping, always on devices
Greenups – windows, appliances, controls, insulation
Solar PV and water
Green building standards
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(c) 2008 Town of Portola Valley

11. Potential GHG Reduction Measures
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(c) 2008 Town of Portola Valley

12. (c) 2008 Town of Portola Valley
Energy Tune Ups
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(c) 2008 Town of Portola Valley

13. GHG emissions over time
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(c) 2008 Town of Portola Valley

14. Working on Existing Homes
Performing voluntary audit of 5 homes in representative neighborhoods
Survey and engineering analysis
Existing equipment and structure
Possible modifications
Windows, insulation, weather stripping
Zone heating, AC
Light controls
CFLs, Power strips
Clothes drying?
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(c) 2008 Town of Portola Valley

15. (c) 2008 Town of Portola Valley
Conclusions
Achieving GHG targets is challenging
Need at least 5000 tonne/yr reduction by 2020
State measures affect gasoline, electric power, vehicle fuel economy
Local action is essential to deal with home heating
Rebuild/remodel of housing stock is slow therefore greenups are essential
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(c) 2008 Town of Portola Valley

16. (c) 2008 Town of Portola Valley
Meeting GHG goals
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(c) 2008 Town of Portola Valley