14
PRIORITY ISSUES ASSESSMENT PROTOCOLS
Minimum Actions Expanded Actions
For homes equipped with an active radon
mitigation system:
• Verify that the radon vent fan is operating.
• If a previously installed radon mitigation
system is not operating correctly OR if the
post-work tested radon level is ≥4 pCi/L,
advise the client to consult the state radon
office.
Relevant Guidance/Standards
ASTM C920.
ASTM E2121.
EPA Indoor airPLUS Specification 1.2.
EPA Radon Guidance: Citizen's Guide to Radon.
RADON (continued)
