Highline Forum 200722 UW MOV UP Ultra fine particulate update

• Study the implications of air traffic at Sea-Tac • Assess the concentrations of ultrafine particulate matter (UFP) in areas surrounding and directly impacted by air traffic • Distinguish between and compare concentrations of aircraft- related and other sources of UFP • Coordinate with local governments, and share results and solicit feedback from community Ultrafine Particles (UFPs) Ultrafine Particles unregulated but potentially important Health Effects more uncertain compared to PM2.5 ,but a growing body of evidence Diesel Engines emit ultrafine particles resulting in elevated levels near major roadways (within 200 meters downwind) Jet aircraft directly emit “ultra” ultrafine particles (< 30 nanometers) below flight paths Study Region: Mobile Transects and Fixed Monitoring Site Locations SEATAC (2018) ❖8th busiest U.S. airport ❖> 49.8 million passengers ❖>432,315 metric tons of air cargo Mobile Monitoring Platform Parameter Instrument Mobile and Fixed sampling: Particle number concentration (35 nm – 1 µm) P-Trak 8525, w/ diffusion screens Particle number concentration (20 nm – 1 µm) P-Trak 8525 Particle number concentration (10 nm – 1 µm) Condensation Particle Counter 3007 Black Carbon PM Micro-Aethalometer AE51 CO2 LI-850 Gas Analyzer Temperature & Humidity Hobo T, RH datalogger Position & Time tracking GPS Receiver DG-500 Fixed Location sampling: Particle size distribution, 13 bins NanoScan 3910 .5 n m D ia m et er n m D ia m et er Probability (%) Conditional Probability Plot These plots show the probability that a given wind direction and wind speed is associated with a high concentration of a) 11.5 nm…

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PSCAA Advisory Council Meeting Agenda
Add to CalendarMWednesday Mar 11, 9:00am - 11:35am
1904 3rd Avenue, Suite 105, Seattle, WA 98101
Call to order – Roll Call – Quorum Established – Land Acknowledgement We would like to acknowledge that our Agency operates in four present-day counties, which are the traditional lands of the Coast Salish people, past and present. This acknowledgement does not take the place of authentic relationships with indigenous communities in our jurisdiction and [...]