ARB Research Seminar

This page updated May 18, 2016

Emissions of Potent Greenhouse Gases from Appliance and Building Waste in Landfills

Photo of Nazli Yesiller

Nazli Yesiller

Photo of James Hanson

James Hanson

Photo of Jean Bogner

Jean Bogner

Nazli Yesiller, Ph.D., Global Waste Research Institute and James Hanson, Ph.D., Civil & Environmental Engineering, College of Engineering, California Polytechnic University at San Luis Obispo; Jean E. Bogner, Ph.D., Department of Earth and Sciences, University of Illinois, Chicago

May 20, 2016
Cal EPA Headquarters, 1001 "I" Street, Sacramento, CA

Research Project


Waste insulating foam from appliances and buildings contains fluorinated gases (F-gases) with very high global warming potentials up to 4,000 times more warming than carbon dioxide. The waste foam has been identified as a potentially significant source of greenhouse gas emissions from landfills. However, actual F-gas emissions measurements at landfills have been few and inconclusive. A typical landfill in California, Potrero Hills Landfill in Suisun City, was selected for sampling emissions of F-gases from the surface of the landfill over a year in the dry season and the wet season. Results showed that surface emissions of F-gases were negligible. Results also indicated that while F-gases were present in the intake piping of the methane collection system, more than 99% of the F-gases were destroyed by the very high temperatures in the methane combustion/destruction systems. Therefore, it was concluded that F-gas emissions estimates from landfills with active methane collection and destruction systems were approximately 90% lower than originally estimated.

Speaker Biography

Nazli Yesiller, Ph.D., is currently is the Director of the Global Waste Research Institute at the California Polytechnic University at San Luis Obispo (Cal Poly). Dr. Yesiller's background and expertise are in geoenvironmental engineering with a special emphasis on containment and reuse applications. She has conducted research related to various aspects of landfill systems since 1990.

James Hanson, Ph.D., is a Professor of Civil & Environmental Engineering, College of Engineering, Cal Poly. Dr. Hanson's interests include geotechnical engineering and geoenvironmental engineering, thermal analysis of landfills, characterization of geomaterials, ground improvement, and large-scale testing and field monitoring.

Jean E. Bogner, Ph.D., is a Research Professor Emerita at the University of Illinois at Chicago, Department of Earth and Environmental Sciences. Recent research has focused on the development and international field validation of a new science-based GHG inventory model (CALMIM) for landfill CH4 emissions inclusive of climate-driven CH4 transport and oxidation. Previously Dr. Bogner has worked more than 20 years at Argonne National Laboratory (ANL), beginning in the mid-1970's with the 1st commercial landfill gas (LFG) recovery and utilization projects for the US Department of Energy, as well as other basic and applied waste research (mining, hazardous, radioactive).

For a complete listing of the ARB Research Seminars and the related documentation
for the seminars please view the Main Seminars web page