Health & Safety Regulations in Radon Mitigation Flashcards

Under ANSI/AARST SGM-SF-2017, which building component must never be used as the sole pathway for a sub-slab depressurization system?

Answer: Block wall interior cavities when they communicate with living space

Block wall cavities that open into living areas cannot serve as the sole depressurization pathway because pulling air through them may draw radon into living spaces rather than exhausting it.

What is the primary health risk associated with radon exposure, according to the US Surgeon General and EPA?

Answer: Lung cancer

The US Surgeon General and EPA identify lung cancer as the primary health risk from radon exposure, making it the second leading cause of lung cancer in the United States after smoking.

Which action is required when a radon mitigation fan is installed in conditioned (heated/cooled) living space?

Answer: The fan housing and all piping must be sealed to prevent radon leakage into the living area

When fan placement inside conditioned space is necessary, all joints, connections, and the fan housing must be airtight to prevent radon-laden air from leaking into the living environment.

A radon contractor is asked to provide a written estimate for a mitigation system. According to professional ethics and ANSI/AARST standards, the estimate should include:

Answer: Scope of work, system components to be installed, warranty terms, and post-mitigation testing provisions

Professional standards and consumer protection principles require that written estimates include scope of work, materials, warranties, and provisions for post-mitigation testing so clients understand what is being provided.

OSHA's fall protection requirements become mandatory for a radon contractor working on an exterior roof penetration at what height above a lower level?

Answer: 6 feet

OSHA's general industry and construction fall protection standards require protection when workers are exposed to a fall of 6 feet or more to a lower level.

Which statement correctly describes the relationship between a state radon program and EPA voluntary guidelines?

Answer: States may set stricter standards than EPA guidelines, but EPA guidelines serve as a national baseline reference

EPA radon guidelines are voluntary and advisory at the federal level; states are free to adopt stricter regulatory standards while using EPA guidelines as a minimum reference baseline.

A homeowner's crawl space radon mitigation system uses a ground cover membrane. According to ANSI/AARST standards, what minimum overlap is required at membrane seams?

Answer: 12 inches

ANSI/AARST standards require ground cover membrane seams in crawl space systems to overlap by at least 12 inches to ensure an effective soil gas barrier.