California Energy Commission Letterhead

Staff Meeting on
Improved Greenhouse Gases Inventory Methods for
California Landfills

The California Energy Commission staff, in coordination with staff from CalRecycle and the California Air Resources Board, will sponsor a meeting to report on the results of a research project designed to develop a new model to estimate methane emissions from California landfills.

Tuesday, May 18, 2010
1 p.m. to 4 p.m.

1516 Ninth Street
First Floor, Hearing Room A
Sacramento, California
(Wheelchair Accessible)

Remote Attendance

Internet Webcast - Presentations and audio from the meeting will be broadcast via our WebEx web meeting service. For details on how to participate via WebEx, please see the Remote Attendance section toward the end of this notice.


Staff at the Energy Commission, CalRecycle, Air Resources Board, and stakeholders will meet with the project's principal investigators, Dr. Jean Bogner of Landfills+, Inc. and Dr. Kurt Spokas from the U.S. Department of Agriculture, to discuss the results of a research project funded by the Energy Commission's Public Interest Energy Research (PIER) Program. This project developed a user-friendly model for annual methane emissions inclusive of seasonal soil moisture, temperature, and methane oxidation rates in daily, intermediate, and final cover materials. The investigators measured seasonal methane emissions from daily, intermediate, and final cover materials at landfills in California and completed complementary laboratory studies to assist with the development and field validation of the model. The freely-available California Landfill Methane Inventory Model (CALMIM) is currently being Beta-tested by a number of California users. Options for full implementation of the model after the completion of the Beta testing will be explored.


Accurate estimates of greenhouse gas emissions are an integral part of fulfilling the mandates of the California Global Warming Solutions Act of 2006 (Assembly Bill 32). Existing emission inventory methodologies for several source categories, including landfills, are currently being improved. Landfills are one of the major sources of methane emissions in California. Methane is a potent greenhouse gas with 25 times the global warming potential of carbon dioxide on a 100-year timeframe. To accurately quantify landfill emissions, consideration must be given to key variables such as site-specific cover materials and methane oxidation in daily, intermediate, and final cover materials, which is related to seasonal temperature and moisture variations. Improving the methane emission inventory for California landfills is an important step towards achieving a more accurate overall greenhouse gas inventory for the state.

Public Participation

The Energy Commission's Public Adviser's Office provides the public assistance in participating in Energy Commission activities. If you want information on how to participate in this forum, please contact the Public Adviser's Office at (916) 654-4489 or toll free at (800) 822-6228, by FAX at (916) 654-4493, or by e-mail at [ ]. If you have a disability and require assistance to participate, please contact Lou Quiroz at (916) 654-5146 at least five days in advance.

Please direct all news media inquiries to the Media and Public Communications Office at (916) 654-4989, or by e-mail at [ ].

If you have questions on the technical subject matter of this meeting, please contact Guido Franco, Senior Engineer, at (916) 654-3940 or by e-mail @ [ ].

Remote Attendance

You can participate in this meeting through WebEx, the Energy Commission's online meeting service. Presentations will appear on your computer screen, and you listen to the audio via your telephone. Please be aware that the meeting's WebEx audio and on-screen activity may be recorded.

Computer Log-on with Telephone Audio:

  1. Please go to and enter the unique meeting number: 926 916 830
  2. When prompted, enter your name other information as directed and the meeting password: meeting@1pm
  3. After you log-in, a prompt will ask for your phone number. If you wish to have WebEx call you back, enter your phone number. This will put add your name on the WebEx log so that we know who is connected and have a record of your participating by WebEx.

    If you do not wish to do that, click cancel, and go to step 4. Or, if your company uses an older switchboard-type of phone system where your line is an extension, click cancel and go to step 4.
  4. If you didn't want WebEx to call you back, then call 1-866-469-3239 (toll-free in the U.S. and Canada). When prompted, enter the meeting number above and your unique Attendee ID number, which is listed in the top left area of your screen after you login via computer. International callers can dial in using the "Show all global call-in numbers" link (also in the top left area).

Telephone Only (No Computer Access):

  1. Call 1-866-469-3239 (toll-free in the U.S. and Canada) and when prompted enter the unique meeting number above. International callers can select their number from

If you have difficulty joining the meeting, please call the WebEx Technical Support number at 1-866-229-3239.

Date: May 10, 2010

Mail Lists: research; climatechange; ghgimpacts; local-government