Abstracts: ISEE 20th Annual Conference, Pasadena, California, October 12–16, 2008: Contributed Abstracts
Using a Mobile Monitoring Platform to Characterize Pollution Concentrations On and Near Heavily-Traveled Roadways in Communities Adjacent to the Ports of Los Angeles and Long Beach
The communities adjacent to the Ports of Los Angeles (POLA) and Long Beach (POLB) are heavily impacted by containerized goods movement, particularly heavy-duty diesel truck (HDDT) traffic. The POLA and POLB combined handle 43% of the container traffic entering the United States and container volumes at these ports are expected to triple in the next decade. Thus, existing and future poor air quality in the area and the resulting adverse health impacts are of great concern. HDDTs traveling through these communities create localized high pollution concentrations missed by conventional fixed-site monitoring, and these concentrations are critical for accurate exposure assessment.
To quantify these impacts, a mobile monitoring platform equipped with real-time instrumentation was driven along fixed routes in these communities to collect spatially- and temporally-resolved data including black carbon, nitrogen oxide, particle bound-polycyclic aromatic hydrocarbons, and ultrafine particle (UFP) number concentration.
Concentrations of these pollutants were frequently found to be several times higher in 150 meter buffer zones immediately downwind of roadways compared with upwind buffer and “non-buffer” zones. Impacts were usually higher during morning times of stagnant wind conditions. High concentrations were also observed when driving on roads heavily trafficked by HDDT, or when driving behind high-emitting or hard-accelerating gasoline vehicles, e.g., UFP number concentrations exceeding one million particles per cubic centimeter.
Overall, near-roadway exposures were significantly elevated for persons living, working or attending school in locations close to heavily diesel trafficked roadways in these port communities.© 2008 Lippincott Williams & Wilkins, Inc.