From: "Dube, Mike (JUS)" <Mike.J.Dube**At_Symbol_Here**ONTARIO.CA>
Subject: Re: [DCHAS-L] Radon Removal
Date: May 17, 2012 2:48:35 PM EDT
Reply-To: DCHAS-L <DCHAS-L**At_Symbol_Here**MED.CORNELL.EDU>
Message-ID: <DB902496-C270-4F7C-8EC3-7CE9A9026A74**At_Symbol_Here**>

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
Program Specialist

Emergency Preparedness and Response Unit (EPRU)

Office of the Fire Marshal of Ontario (OFM)
Ministry of Community Safety and Correctional Services (MCSCS)
Office: (705)687-9696
Cell: (705) 715-4768
Pager: (705) 735-5935
Fax: (705) 687-8636

From: 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.


Rob Toreki



Safety Emporium - Lab & Safety Supplies featuring brand names

you know and trust.  Visit us at

esales**At_Symbol_Here**  or toll-free: (866) 326-5412

Fax: (856) 553-6154, PO Box 1003, Blackwood, NJ 08012


On May 17, 2012, at 9:31 AM, Butler, David H. wrote:

Good Morning,


We have a small room in our laboratory where radon gas buildup is an issue that interferes with our alpha detection equipment.


Anyone know of air filtration devices or any other solution that might help us eliminate this problem?


Thanks for your time and help.


David H. Butler

Lab Quality/Safety Mgr., MBA, CSSBB, CMQ/OE, CHO

9/80 Group A



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