Radon gas is a common problem in homes built anywhere on the Canadian Shield; blasting granite to put in a home foundation faces this issue as well. Our solution – install a ventilation fan in the foundation wall, drawing air out of the closed space. This ventilation flow reduces the problem to negligible amounts. For your lab room – increase ventilation flows by adjusting HVAC damper settings; or install a ventilation fan to the outside and pressurize the room with fresh air, blowing out into the lab, where building HVAC will remove it. A simple small furnace filter on the fresh air fan will take care of outdoor particulates. This process is minimally invasive.
Michael J. Dube
Emergency Preparedness and Response Unit (EPRU)
Office of the Fire Marshal of Ontario (OFM)
Ministry of Community Safety and Correctional Services (MCSCS)
Cell: (705) 715-4768
Pager: (705) 735-5935
Fax: (705) 687-8636
DCHAS-L Discussion List [mailto:dchas-l**At_Symbol_Here**MED.CORNELL.EDU] On Behalf Of ILPI
Sent: May 17, 2012 1:15 PM
Subject: Re: [DCHAS-L] Radon Removal
Presumably, the radon is coming from the soil beneath the building in which case the usual remediation method is sub-slab depressurization. Basically, you drill a 4" hole through the slab into the soil beneath, run a plastic pipe up to the roof where an exhaust fan sucks out the radon-contaminated atmosphere beneath the slab. This stops the radon before it can enter the building itself. Google the term "sub-slab depressurization" and you'll get lots of drawings, diagrams and descriptions.
Any competent radon remediation expert (guess the Yellow Pages are still useful!) can handle this. For a home, it might run $1,000 or so, installed.
On May 17, 2012, at 9:31 AM, Butler, David H. wrote:
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