Notes
Grant proposal by Puget Sound Clean Air Agency (PSCAA) contact Erik Saganic requesting $419,252.64 (total project cost $580,017.71) to study highway air toxics impacts in Seattle’s Chinatown-International District and Yesler Terrace neighborhoods adjacent to Interstate-5 (I-5) at the I-90 junction. Project covers fixed-site air toxics sampling (VOC, aldehyde, PAH, PM10 metals), community-directed sampling, and mobile monitoring using total VOC sensors over 33 months (July 2015–March 2018). Key pollutants include benzene, 1,3-butadiene, formaldehyde, acetaldehyde, and diesel particulate matter (DPM). References 2005 National-Scale Air Toxics Assessment (NATA) ranking the area as highest-risk census tract in Washington State, with estimated cancer risk of 1,500 per million using California OEHHA unit risk factor. Monitoring site located at 10th and Weller, approximately 20 meters east of I-5. Community characterized by 40% limited English proficiency, median income ~$15K/year, 40% below federal poverty level, up to 92% minority race. Builds on fall 2014 pilot study and University of Washington 2010 black carbon mobile monitoring campaign.