MAH_2019

MAH 2019 Companion Guidance Section A General Inspection of Mitigation Systems 2 GENERAL INSPECTION — EXISTING RADON MITIGATION SYSTEMS SAFETY REVIEW Advisory—This list is intended for use by homeowners and inspection personnel. It is not intended to verify compliance with local regulations or any published radon standard. Radon Testing If No, recommended action ❏ Was the most recent test within the last 2 years? ❏ Test for radon ❏ Are recent test reports available? ❏ Is there radon system piping and a radon fan? ❏ Test for radon. If readings are low, test again in the heating season Fan and Exhaust Location ❏ Is the fan outside of occupiable space and not beneath an occupiable space (e.g., not in a basement, crawl space or attached garage that is under occupiable space)? ❏ Relocate the fan to meet compliance with current standards ❏ Does fan electrical wiring appear safe? ❏ Correct unsafe electrical wiring. ❏ Is the system exhaust at least 10 feet above grade? ❏ Take action to bring the exhaust location into compliance with current standards ❏ Is the system exhaust at least 2 feet above or 10 feet to the side of operable openings in all windows, doors or other ventilation openings between outdoor air and indoor air? Radon Pipe Routing ❏ Are building exits for fire and safety clear of obstructions? ❏ Take action to correct hazards ❏ Does pipe routing retain fire protection and safe distances from electrical panels or meters for gas or liquid fuel? Radon Fan Monitor ❏ Is there a viewable fan monitor? ❏ Install a viewable fan monitor ❏ Does the radon fan appear to be running? ❏ Activate or replace the fan Openings to soil ❏ Do all sump pits have rigid sealed lids? ❏ Seal or install a durable sump lid ❏ Are sump lid materials durable and safe if stepped on? ❏ Are accessible openings to soil closed or sealed except those that might compromise water drainage? ❏ As appropriate, seal openings in slabs and crawl space membranes Non-habitable air spaces ❏ For less common systems that draw air from behind a wall, under a floor or from a crawl space , are openings closed or sealed between the non-habitable air space and both indoor and outdoor air surrounding the non-habitable air space? ❏ Take action to establish sufficient closure to prevent energy penalties or flue gas spillage from atmospherically vented combustion appliances ❏ If radon testing indicates open foundation or crawl space vents are an important mitigation component, are permanently open vents installed? ❏ Take action to install non-closable vents or install a system that is effective during all seasons