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City of Ann Arbor SSWWEP - Citizens Advisory Committee Coordination — City of Ann Arbor

2.69 -C- FDD installations disturb the floor slab. What is the impact of this on radon in the home?

Posted by Lori Byron on 21 Dec, 2013
Category: Category 2 - about potential recommendations

Frank Burdick’s Log Number: 16
Submitted by: Burdick log
Category (1,2,3): 2
Status: Closed
Estimated date to address: N/A

Q. FDD installations disturb the floor slab. What is the impact of this on radon in the home? 

[CITY] A. During installation the a section of the floor slab is removed to provide access to the plumbing beneath the floor.  The new sump is installed in this space and completely sealed around the perimeter of the sump with new concrete.  This prevents the movement of gasses around the sides of the sump.  The sump itself, which is connected to the area below the basement floor, by the footing drains, includes a sealed and gasketed lid that will also prevent the movement of any gas from under the floor to the basement. Together, these two measures prevent gas from moving from the under floor area to the basement space.  

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