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how to verify radon contractor

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To verify a radon contractor, start by checking their state or tribal certification, as most require professionals to hold a valid license. Look for membership in national programs like the National Radon Proficiency Program (NRPP) or the National Radon Safety Board (NRSB). Ask for references from recent jobs and verify with past clients. A trustworthy contractor will conduct both initial testing and mitigation, follow EPA protocols, and provide a written report detailing radon levels and the w…