Gas-phase and particle-phase organic compounds emitted from motor vehicle traffic in a Los Angeles roadway tunnel
- California Inst. of Tech., Pasadena, CA (United States). Environmental Engineering Science Dept.
- Oregon State Univ., Corvallis, OR (United States). Coll. of Oceanic and Atmospheric Sciences
The emission rates for 221 vapor-phase, semivolatile, and particle-phase organic compounds from motor vehicles plus fine particulate matter mass and some inorganic particle-phase species are calculated based on measurements made inside and outside a Los Angeles roadway tunnel in 1993. These emission rates are calculated based on tunnel dilution rates or air circulation. The results show carbon monoxide emissions rates of 130 g L{sup {minus}1} of gasoline-equivalent fuel burned and volatile organic compound (VOC) emissions of 9.1 g L{sup {minus}1}. These values are higher than predicted by the baseline version of California`s EMFAC 7G emissions inventory program but are within the coemission rate range of 108 {+-} 25 g L{sup {minus}1} reported by roadside remote sensing studies in Los angeles. When the VOC emissions composition in the tunnel is compared to that of tailpipe emissions source test data and to the composition of additional unburned whole gasoline, the tunnel atmosphere is found to be consistent with a linear combination of these major contributors over a fairly broad range of about 74--97% vehicle exhaust depending on the tailpipe profiles used.
- OSTI ID:
- 655416
- Journal Information:
- Environmental Science and Technology, Journal Name: Environmental Science and Technology Journal Issue: 14 Vol. 32; ISSN ESTHAG; ISSN 0013-936X
- Country of Publication:
- United States
- Language:
- English
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