Skip to content
  • STNI
  • Statistics
    • Ops and Passengers
      • King County International Airport (Boeing Field) Annual Operations
    • Financials
    • Aviation fuel uplift in the State of Washington 2018 – 2025
      • Aviation Fuel Tax Revenue in the State of Washington 1983-2025
      • Aviation Fuel Uplift at Sea-Tac Airport
    • Air Quality Monitoring
    • Flight Tracking
      • Flow and Flight Tracks
      • Five Year Comparison
      • Busiest Hours and Days
    • SEL Noise Reports & Graphs
      • About The Permanent Noise Monitors
      • Minutes of Quiet by Noise Monitor
      • Noise Events mapped
      • Noise Events (SEL)
    • Runways
    • Employees
    • Real Estate
      • Port Properties and Trees mapped
    • Parking
  • Events
  • Protest
    • Regular Events
    • Legislation 2026
    • Complain about a particular flight
    • Advocacy Organizations
    • Media Outlets
    • People
    • The Port of Seattle
      • Commission Meetings
      • Public Records Requests
      • StART
      • Highline Forum
    • Contact Your Electeds
  • Resources
    • FAQs
      • FAA Occurrences/Accidents/Indents
    • The SAMP
      • SAMP Public Comment Template
        • Two versions of Appendix K: NEPA/SEPA 2018 vs 2023
      • SAMP NTP: 31 projects by the numbers
      • SEPA Draft EIS (2026)
      • SAMP Record of Decision/FONSI (2025)
      • SAMP Draft EA (October 2024)
      • 2018 Scoping
    • Port Packages
      • Port Package Property Costs
      • Port Packages mapped
      • The Port Package Explainer
      • So you want a (first-time) Port Package? Start here
      • Port Package Looker Upper
      • How do I determine if I have a Port Package or Avigation Easement?
      • Progress on Port Package Update legislation
      • Having a Port Package Problem?
      • Port Package Site Visit Follow-Up
    • Document Library
    • Explainers
      • The Airport Law Cheat Sheet
      • The Grant Explainer
    • External Articles
    • History
      • Timeline
      • The Sea-Tac Communities Plan
        • Sea-Tac Communities Plan – Planning Maps
      • PSRC Third Runway Decision Process
    • Studies
    • Videos
  • Stories
  • Mission
  • Subscribe
  • Contact
Scroll down to content

Get InformedStay Informedx

I understand that you will never share my information with anyone, you will only use it to keep me updated on relevant events and that I may unsubscribe at any time.

STNI

STNISea-Tac Noise.Info

  • Solve for Sea-Tac. Solve for every airport.
  • Since 2016, working to obtain justice for everyone living under the flight path.
  • Less Noise. Cleaner Air. Better Public Health. Compensation.
  • Everything you think you know about the airport is wrong.

TagScientific Measurement(4)

Advanced Search Options

  • Dates
  • Media
    • External Articles
    • Images
    • PDFs
    • Video
    • Audio
  • Order By
  • FAA SPL V2 HR Trim

    SEL Sound Exposure Level and Energy Metrics

    An educational diagram illustrating acoustic measurement concepts including Sound Exposure Level (SEL), Lmax, LEQ, and energy, plotted as sound level (dB) over time (seconds). The graphic shows how SEL compresses a noise event's total energy into a normalized 1-second value, with Lmax appearing approximately 10dB above the LEQ reference line.
    TagsFAA, Noise 101, Scientific MeasurementFolderNoise
  • MOV-UP report vehicle — UCAR atmospheric monitoring Prius

    A white Toyota Prius Hybrid bearing the UCAR (University Corporation for Atmospheric Research) logo on its door, equipped with roof-mounted scientific instrumentation including sensors and probes. The vehicle is numbered 144 and appears to be configured for atmospheric or environmental data collection fieldwork.
    TagsAir Quality Monitors, Atmospheric Science, MOV-UP, Scientific Measurement, UWDEOHSFolderUWDEOHS
  • 2001-12-19

    EXH AR017502: Guidance for the Use of Tables — Practical Quantitation Limits (PQLs), Method Detection Limits (MDLs), and PQL Comparisons to Method B Cleanup Levels

    Ecology guidance document (AR017502, Part II of IV) explaining how to use PQL and MDL tables under the Model Toxics Control Act (MTCA). Covers Practical Quantitation Limits (PQLs), Method Detection Limits (MDLs), and comparisons to MTCA Method B cleanup levels for water and soil. Describes analytical methods from US EPA SW-846 (3000, 7000, 8000-8100, 8310,
    TagsACC, Ecology, Model Toxics Control Act, MTCA, Pollution Control Hearings Board, Scientific Measurement, WACFolderBox 08
  • 1975-01-01

    Selection of airport noise analysis method and exposure limits

    This 1975 working paper from the Maryland State Aviation Administration examines methods for measuring and analyzing airport noise exposure, focusing on the Day-Night Average Sound Level (Ldn) as the recommended metric for assessing community noise impact. It reviews how sound characteristics such as magnitude, frequency, and time distribution affect human response, and evaluates criteria for acceptable noise limits based on effects including hearing loss, speech interference, sleep disturbance, and annoyance. The document also compares international noise exposure standards and proposes guidelines for land-use compatibility around airports.
    TagsHUD, Noise, Scientific MeasurementFolderStudies
Sidebar On/Off

Upcoming Events

  • Stay Grounded Event: Night trains, not night planes!
    Add to CalendarMSunday Sep 13: 12:00am
    Ntnnp social media3

    For the past two years, more than 220 initiatives from 15 countries have declared September 13th as the International day for the ban of night flights at airports. In parallel, activists across Europe have been gathering for pyjama parties for night trains – coordinated in 2024 and 2025 by Back on Track and Stay Grounded.

    [...]
  • Burien Airport Committee Meeting September 15, 2026
    Add to CalendarMTuesday Sep 15: 6:00pm
    400 SW 152nd St, Burien, WA 98166
    Burien airport committee 15 sep 2026 agenda pdf pdf

    a) Part 150 Noise Study (Emily Inlow-Hood) — 15 minutes
    b) SAMP Update and Next Steps (Brian Davis and Sarah Moore) — 15 minutes
    c) Legislative Updates — 10 minutes
       • SCA (Sarah Moore)
       • Work with Sen. Orwall (Brian Davis)
    d) StART Reorganization (Jeff Harbaugh and Karen Veloria) — 10 minutes

    [...]

[See all...]


Help study childhood asthma. Get free HEPA filter!

read more...

Issues

Sea-Tac Airport is currently undergoing the largest and longest expansion in its history, collectively known as the Sustainable Airport Master Plan (SAMP). Some of it you can already hear, but you’re probably not aware of what it all means. Here’s what you need to know.
read more...

Read This!

As the source for federal transportation grants, the Puget Sound Regional Council was charged with developing a system to meet the growing need for commercial aviation. When the search for a second airport failed, they authorized the Port of Seattle to build the Third Runway, with a mandate to develop a noise abatement and mitigation program. In their effort to stop the Third Runway, the ACC argued over every detail of the Port's efforts--including property buyouts and sound insulation. The dispute was meant to be settled by a three member Expert Arbitration Panel. This is their final report. It finds 2-1, that the Port's program was insufficient in several respects. Despite that, funding for the Third Runway was approved by the PSRC, and the 'Port Package' program, proceeded largely unchanged. Expert Arbitration Panel's final decision finding that the Port of Seattle had not shown sufficient reduction in real on-the-ground noise impacts to satisfy noise reduction conditions required for approval of a third runway at Sea-Tac International Airport. The majority decision concluded the Port's noise abatement programs were insufficient despite being impressive in scope.
continue...

The Podcast!

Subscribe to the only podcast devoted to policies, politics, history, impacts for people living under the flight path everywhere. It’s definitely not just about noise!
  • Sea-Tac Noise.Info
  • Connect with STNI

    • Subscribe
    • Port Package Problem?
    • Donate
    • Podcast
    • Socials
      • Facebook
      • X (Twitter)
      • Bluesky
      • Instagram

    "Aerial View of Sea-Tac Airport Looking North Toward Puget Sound" — , 2001

  • Learn

    • Frequently Asked Questions
    • Explainers
    • Youtube
    • Research Requests
    • Make a complaint
  • Goals

    Fulfill the promises of 1976:
    • Compensation
    • Reduced noise
    • Improved air quality
    • Environmental remediation
Login/Register
©2026•Data Privacy

Message

We use cookies to provide basic functionality. We also provide access to search engines in order to provide site analytics. We do not sell or share your data.
V V