- Thesearchextendstoatticsandbasementsacrossthenation.Worksonanyfloor,evencarpets,toinsulatelivingareas,garagesandbasements.Radonlevelsareusuallyhigherinbasements,cellarsorotherstructuralareasincontactwithsoil.Museumbasementsarestackedfullofobjectswhic...
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