Skip to main content
U.S. flag

An official website of the United States government

Here’s how you know

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

HTTPS

Secure .gov websites use HTTPS
A lock (LockA locked padlock) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

    • Environmental Topics
    • Air
    • Bed Bugs
    • Cancer
    • Chemicals, Toxics, and Pesticide
    • Emergency Response
    • Environmental Information by Location
    • Health
    • Land, Waste, and Cleanup
    • Lead
    • Mold
    • Radon
    • Research
    • Science Topics
    • Water Topics
    • A-Z Topic Index
    • Laws & Regulations
    • By Business Sector
    • By Topic
    • Compliance
    • Enforcement
    • Laws and Executive Orders
    • Regulations
    • Report a Violation
    • Environmental Violations
    • Fraud, Waste or Abuse
    • About EPA
    • Our Mission and What We Do
    • Headquarters Offices
    • Regional Offices
    • Labs and Research Centers
    • Planning, Budget, and Results
    • Organization Chart
    • EPA History

Breadcrumb

  1. Home
  2. Asbestos

What should a school do if it finds thermal system insulation (TSI) in a ceiling space, pursuant to the Asbestos Hazard Emergency Response Act (AHERA)?

If the space in which the TSI is discovered has never been inspected in accordance with the Asbestos Hazard Emergency Response Act (AHERA) inspection requirements, then such an inspection must be undertaken and should focus on all such previously unexpected space above a drop ceiling in which TSI is present. Any areas of a school building where friable asbestos-containing building material (ACBM), damaged or significantly damaged TSI ACM, or friable suspected ACBM assumed to be ACM are present shall be cleaned at least once after the inspection is complete. See 40 CFR part 763.91(c). If any of the TSI encountered is damaged, AHERA requires that the local education agency repair the damaged material and/or “remove the damaged material if it is not feasible, due to technological factors, to repair the damage.”

Other Frequent Questions about Asbestos

Learn About Asbestos
Asbestos and School Buildings
Information for Owners and Managers of Buildings that Contain Asbestos

Protect Your Family from Exposures to Asbestos
Asbestos Contaminated Vermiculite Insulation

Asbestos

  • Learn About Asbestos
  • Protect Your Family
  • Recent EPA Actions to Prevent Asbestos Exposure
  • EPA Asbestos Risk Evaluation
  • School Buildings
  • Building Owners and Managers
  • State Contacts
Contact Us about Asbestos
Contact Us to ask a question, provide feedback, or report a problem.
Last updated on April 1, 2025
  • Assistance
  • Spanish
  • Arabic
  • Chinese (simplified)
  • Chinese (traditional)
  • French
  • Haitian Creole
  • Korean
  • Portuguese
  • Russian
  • Tagalog
  • Vietnamese
United States Environmental Protection Agency

Discover.

  • Accessibility Statement
  • Budget & Performance
  • Contracting
  • EPA www Web Snapshot
  • Grants
  • No FEAR Act Data
  • Plain Writing
  • Privacy
  • Privacy and Security Notice

Connect.

  • Data
  • Inspector General
  • Jobs
  • Newsroom
  • Regulations.gov
  • Subscribe
  • USA.gov
  • White House

Ask.

  • Contact EPA
  • EPA Disclaimers
  • Hotlines
  • FOIA Requests
  • Frequent Questions
  • Site Feedback

Follow.