Skip to main content
NC DEQ logo NC DEQ

Topical Navigation

  • Home
  • Divisions
    Divisions
    • Air Quality
    • Coastal Management
    • Energy, Mineral, and Land Resources
    • Environmental Assistance and Customer Service
    • Environmental Education and Public Affairs
    • Marine Fisheries
    • Mitigation Services
    • Waste Management
    • Water Infrastructure
    • Water Resources
  • Permits & Rules
    Permits & Rules
    • Permit Directory
    • State Environmental Policy Act (SEPA)
    • Express Permitting
    • DEQ Forms
    • Permit Assistance and Guidance
    • Rules & Regulations
    • Enforcement
    • NC DEQ ePayments
    • DEQ Permitting Transformation Program
    • Environmental Application Tracker
    • Pre-Regulatory Landfills Map
    • Title VI Compliance
    • Risk-Based Remediation
  • Outreach & Education
    Outreach & Education
    • N.C. Environmental Education
    • Distance Learning - Environmental Education
    • Environmental Justice
    • Educator Resources
    • Recognition Programs
    • Public Involvement Programs
    • Training
    • Recreation
    • Research
    • Grants
    • Conservation
    • Recycling
  • Energy & Climate
    Energy & Climate
    • Energy Group
    • Climate Change
    • Community Solar
    • Energy Assurance
    • Energy Efficiency and Weatherization
    • Energy Resilience
    • Transportation
    • Workforce Development
    • Offshore Wind Development
  • News
    News
    • Press Releases
    • Public Information Contacts
    • Environmentally Speaking Blog
    • Public Notices & Hearings
    • Events
    • Key Issues
    • DEQ Dashboard
    • Legislative Reports
    • Requesting Public Records
  • About
    About
    • Our Mission
    • Leadership
    • Boards and Commissions
    • Divisions
    • Green Square
    • Contact
    • Work at DEQ
  • NC.GOV
  • AGENCIES
  • JOBS
  • SERVICES
NC DEQ »   About »   Divisions »   Air Quality »   Air Quality Monitoring »   Special Studies »   Data Proposed For Exclusion From NAAQS Compliance Determinations

Data Proposed For Exclusion From NAAQS Compliance Determinations

"Exceptional Events Documentation Packages"
Data impacted by an exceptional event may be excluded from use in determining compliance with the National Ambient Air Quality Standards (NAAQS) when they meet certain criteria defined in 40 CFR § 50.14 - "Treatment of air quality monitoring data influenced by exceptional events". Exceptional events are defined as events that occur and impact air quality that cannot be controlled by human intervention and that are not expected to reoccur, such as wildfires. To exclude data impacted by an exceptional event the agency must demonstrate to the Environmental Protection Agency that the event occurred, the event impacted the monitor, the value measured was not what would have been expected for that location and season (i.e., it was atypical), and that the NAAQS would not have been exceeded if that event had not occurred. The following fine particle exceptional events documentation packages have been prepared and submitted to EPA:

  • Local Fires, February 2008, creating higher readings in McDowell County
     
  • Edna Buck Road Fire, Wildfire, March 2008, affecting one exceedance in New Hanover County
     
  • Evans Road Fire, Wildfire, June 2008, affecting about seven scattered exceedances

Special Studies

  • Data Proposed For Exclusion From NAAQS Compliance Determinations
  • Duplin County Air Monitoring Study Data Releases
  • Data Proposed For Exclusion From NAAQS Compliance Determinations
  • Data Proposed For Exclusion From NAAQS Compliance Determinations

Share this page:

  • Facebook
  • Twitter
  • Email

How can we make this page better for you?

Back to top

Contact Us

Physical Address
North Carolina Department of Environmental Quality
217 West Jones Street
Raleigh, NC 27603 Map It
877-623-6748

Mailing Addresses

Work for Us

  • Job Opportunities at DEQ
  • For State Employees
  • DEQ Intranet

Twitter Feed

Tweets by NC DEQ

Follow Us

  • Facebook
  • Twitter
  • Instagram
  • YouTube
  • LinkedIn
  • DEQ Employee Directory
  • Translation Disclaimer
  • Accessibility
  • Terms of Use
  • Privacy Policy
  • Open Budget
NC DEQ
https://deq.nc.gov/about/divisions/air-quality/air-quality-monitoring/special-studies/data-proposed-exclusion-naaqs-compliance-determinations-0