TagJohn Williamson(3)

Previous air pollution modeling efforts and current facility expansion activities at Sea-Tac International Airport have raised concerns about elevated nitrogen dioxide (NO2) levels in the surrounding community. The goals for this project were to 1) assess compliance with the 100 micrograms per cubic meter annual national ambient air quality standard (NAAQS) for NO2, 2) quantify any local concentration gradients, and 3) evaluate the impact of aircraft operations on local NO2 levels. The scope of this project included annual NO2 measurements throughout the community; samplers were located in areas near the north and south ends of the airport where aircraft operations would most likely affect ambient concentrations. Three-week integrated NO2 measurements were continuously performed at 16 locations using Yanagisawa NO2 diffusion badges. Additionally, Washington State Department of Ecology (WDOE) performed continuous nitrogen oxides (NOX) measurements using Federal Reference Method chemiluminescent analyzers and collected meteorological data at two of the sampling locations. Annual average NO2 measurements at all sites were well below the NAAQS. Consistent spatial concentration gradients were observed throughout the study. NO2 levels decreased from east to west. NO2 levels generally decreased with distance from both the airport runways and local freeways. Hourly NOX and meteorological data from WDOE monitoring stations were used to identify local source impacts by comparing measured NOX levels by wind direction. Because NOX is primarily emitted as nitric oxide (NO), concentration of this species varied more with wind direction than NO2. Evidence of a small but discernable airport impact on NOX levels was observed near…

Spatial and Temporal Patterns of Airborne Toxic Species in Seattle, WA Neighborhoods Paper # 456 Hal Westberg, Brian Lamb and Doris Montacastro Laboratory for Atmospheric Research Washington State University Pullman, WA 99111 John Williamson Washington Department of Ecology 3190 160th Ave. SE Bellevue, WA 98008

Addressing Community Health Concerns Around SeaTac Airport Response to the question, “Is it possible to monitor jet engine exhaust emissions or to model their path using data on prevailing winds and takeoff patterns?” March 2000 Prepared by Washington State Department of Health Washington State Department of Ecology Puget Sound Clean Air Agency In consultation with Public Health – Seattle & King County SeaTac Airport Area Community Representatives United States Environmental Protection Agency University of Washington Washington State University For more information contact Juliet VanEenwyk Washington State Department of Health (360) 236-4250 juliet.vaneenwyk@doh.wa.gov Naydene Maykut Puget Sound Clean Air Agency (206) 689-4062 nmaykut@pscleanair.org John Williamson Washington State Department of Ecology (425) 649-7118 jwil461@ecy.wa.gov Additional copies of this report are available at: http://www.doh.wa.gov/EHSPHL/Epidemiology/NICE/default.htm CONTENTS Abbreviations.................................................................................................................................................. ii Executive Summary ........................................................................................................................................ 1 Preface ............................................................................................................................................................ 5 Background..................................................................................................................................................... 5 Conclusions Based On Previous Air Quality Studies...................................................................................... 6 Rationale For Further Study............................................................................................................................ 7 Health Issues............................................................................................................................................ 7 Environmental Justice.............................................................................................................................. 8 Recommendations........................................................................................................................................... 9 Goals of an Air Quality Study.................................................................................................................. 9 General Recommendations For an Air Quality Study.............................................................................. 9 Methods ........................................................................................................................................................ 10 Manual Methods .................................................................................................................................... 10 Automated Methods............................................................................................................................... 11 Quality Assurance Procedures ............................................................................................................... 11 Data Analysis And Interpretation.................................................................................................................. 12 Initial Data Analysis .............................................................................................................................. 12 Additional Data Analysis ....................................................................................................................... 14 Timeframe..................................................................................................................................................... 16 Estimated Costs as of March 2000................................................................................................................ 17 References..................................................................................................................................................... 18 Attachment 1: Committee Members ............................................................................................................. 19 Attachment 2: Summary of Recent Studies................................................................................................... 21 Attachment 3: Draft List of Recommended Pollutants For Air Monitoring.................................................. 25 Attachment 4: Compendium Method TO-11A.............................................................................................. 27 Attachment 5: Compendium Method TO-13A.............................................................................................. 29 Attachment 6: Compendium Method…