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May 8, 2007Sacramento

California’s 1990 GHG Emission Level and Estimates of Landfill

Emissions

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Statewide GHG Emissions Statewide GHG Emissions LevelLevel

AB32 requires the Air Resources Board to:

Determine 1990 statewide emissions level Consider all six Kyoto gases Establish 2020 limit equivalent to 1990

level Use best available data Present for ARB Board consideration by

January 1, 2008

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Improving Existing Estimate of Improving Existing Estimate of 1990 Statewide Emissions 1990 Statewide Emissions

LevelLevel Begin with existing state GHG inventory

from California Energy Commission (CEC)

Document existing data sources and emissions estimation methods

Acquire improved data for selected source categories, including landfills

Establish new 1990 statewide, aggregate GHG emissions level

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Landfills and Greenhouse Landfills and Greenhouse GasesGases

Over 3000 landfills in California Major source of methane from landfill gas

Methane 21 times the global warming impact of CO2

Can be captured and used in LFGTE systems California Energy Commission estimates

landfills produced two percent of the statewide greenhouse gas emissions in 1990

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Existing CEC Landfill EmissionsExisting CEC Landfill Emissions

Landfill gas formed from waste decomposition

Estimates based on methane from landfill gas not combusted or otherwise oxidized

Data provided by local air districts to ARB and CEC

Current 1990 estimate of landfill emissions: 8.13 Million Metric Tons of CO2 Equivalents (MMTCO2E)

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Improving Landfill Estimates Improving Landfill Estimates

ARB staff is proposing a single, consistent methodology for updating the landfill GHG inventory

In collaboration with CIWMB, ARB is currently conducting a survey of landfills in the state

Survey data used to calculate more accurate, California-specific landfill emissions

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ScheduleSchedule

Improved 1990 GHG estimate from landfills expected in early summer

Public Workshop to discuss draft improved estimates

Staff Report in October

Board Hearing late 2007

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Richard Bode – ChiefEmissions Inventory Branch rbode@arb.ca.gov(916) 323-8413

Doug Thompson – ManagerClimate Change Reporting Section dthompson@arb.ca.gov(916) 322-7062

Webster Tasat – ManagerEmissions Inventory Analysis Section wtasat@arb.ca.gov (916) 323-4950

Larry Hunsaker – Lead StaffGHG Landfill Emissions lhunsake@arb.ca.gov(916) 324-7168

ARB ContactsARB Contacts