There might be a concern...
Quote:
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EPA disallowed ground level discharge of radon primarily because of the potential for re-entrainment of the gas into the house and because of the possibility of children being exposed to high radon levels. The concentration of radon gas at the discharge point can be tens of thousands of picocuries per minute.
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https://www.epa.gov/radon/why-must-r...-my-homes-roof