For Detailed
Architectural Drawing Click here. |
Passive or skeletal new
construction systems are not acknowledged mitigation systems and
may or may not reduce radon concentrations in homes to below the
USEPA'S Action level,4.0 picocuries per liter of air (4pCi/L).
IDNS encourages homeowners to test their home to determine the
actual radon levels. With test results of 4 pCi/L or more,
passive and skeletal new construction systems should be
converted to active soil depressurization systems by mitigation
professionals licensed by IDNS. IDNS recommends that
post-mitigation measurements be performed by measurement
professionals licensed by IDNS in order to ensure defensibility
and reliability of test results.
Passive System
"rough-in"
Some builders perform only the
sub-slab preparation and stub the vent pipe above the slab. A vent
pipe can be connected and routed through the home and roof later
if radon levels are high. This is not the recommended approach. It
is much more cost effective to run the vent pipe through the house
during construction rather than after the walls have been closed
up. However, if you elect to "rough in" a radon
reduction system, it is important to be clear with the home buyer
that the home is not equipped with a functioning system. Be sure
to seal off the riser stub so that radon is not being vented into
the living space. Also, label the stub so it is not used as a
plumbing waste line. |
