Diesel engine exhaust


On-Road Sampling Of Diesel Engine Emissions Of Polychlorinated Dibenzo-P-Dioxin And Polychlorinated Dibenzofuran

On this page:


The first known program to sample mobile heavy duty diesel engine emissions for polychlorinated dibenzo-p-dioxin and polychlorinated dibenzofuran ("PCDD/F") during highway and in-city driving routes was conducted. The post-muffler stacks of two diesel tractors hauling loaded trailers were sampled with a modified EPA Method 23 train. Extensive care was taken to ensure high data quality including sampling large volumes, repeat measurements, and high resolution mass spectroscopy. Analytical results from five tests showed significant yields of PCDD/F. The average emission factor obtained from this work was 0.029 nanograms (ng) international toxic equivalency (I-TEQ)/km. The upper limit of the 95% confidence interval provides an estimated emission factor of 0.106 ng I-TEQ/km. Based on these values and 1993 diesel truck travel estimates, the projected U.S. annual emissions from on-road diesel vehicles are 4.4 g I-TEQ/yr with a 95% confidence upper bound of 16.1 g I-TEQ/yr.


Gullett, B. AND J. Ryan. On-Road Sampling Of Diesel Engine Emissions Of Polychlorinated Dibenzo-P-Dioxin And Polychlorinated Dibenzofuran. Ecoinforma Press, Bayreuth, GERMANY, 1997.

Top of Page

Additional Information

The full paper is available in the Downloads section. Posting of short paper approved by Ecoinforma Press, Jean-Paul-Str. 30, D-95444 Bayreuth. Fax: 49-021-54626. E-Mail:

Top of Page


This document has been reviewed in accordance with U.S. Environmental Protection Agency policy and approved for publication. Mention of trade names or commercial products does not constitute endorsement or recommendation for use.

If you have a disability and the format of any material on our web pages interferes with your ability to access the information, please reach out to us using the Contact Us about IRIS form for assistance. To enable us to respond in a manner most helpful to you, please indicate the nature of the accessibility problem, the web address of the requested material, your preferred format in which you want to receive the material (electronic format (ASCII, etc.), standard print, large print, etc.), and your contact information.

Top of Page