If, during a periodic surveillance check, a custodian finds damaged thermal system insulation, what must be done under the Asbestos Hazard Emergency Response Act (AHERA)?

40 CFR part 763.90(b) states that “[i]f damaged or significantly damaged thermal system insulation ACM is present in a building, the local education agency shall:

• At least repair the damaged area;
• Remove the damaged material if it is not feasible, due to technological factors, to repair the damage; and
• Maintain all thermal system insulation ACM and its covering in an intact state and undamaged condition.”