Energy Savings Plus Health | INDOOR AIR QUALITY GUIDELINES FOR MULTIFAMILY BUILDING UPGRADES 27
Table 2: Radon Testing Options and Reduction Strategies
1
Pre-Work
Test Result and
Precautionary Measures
Post-Work
Test Result
Minimum Actions Expanded Actions
< 2 pCi/L
Consider precautionary
radon-reduction actions as
part of building upgrade
work, especially covering
exposed earth, air sealing
open sumps, and ensuring
floor drains have traps and
that the traps are not dry.
< 2 pCi/L No further minimum action.
> 2 and
< 4 pCi/L
Complete foundation air sealing
strategies.
For post-work radon levels between 2 and
4 pCi/L, refer the building owner/property
manager to EPA's A Citizen's Guide to
Radon and Consumer's Guide to Radon
Reduction and/or mitigate in accordance
with AARST Radon Mitigation Standards
for Multifamily Buildings, RMS-MF 2014.
> 4 pCi/L Mitigate in accordance with AARST
Radon Mitigation Standards for
Multifamily Buildings, RMS-MF 2014.
> 2 and < 4 pCi/L
Take precautionary
radon-reduction actions:
complete foundation air
sealing strategies as part of
building upgrade work.
< 4 pCi/L
and NOT
higher than
pre-work
level.
No further minimum action. For post-work radon levels between 2 and
4 pCi/L, refer building owner/property
manager to EPA's A Citizen's Guide to
Radon and Consumer's Guide to Radon
Reduction and/or mitigate in accordance
with AARST Radon Mitigation Standards
for Multifamily Buildings, RMS-MF 2014.
< 4 pCi/L
AND higher
than pre-
work level.
Verify that foundation air sealing
strategies were completed appropriately
and correct deficiencies.
For post-work radon levels between 2 and
4 pCi/L, refer building owner/property
manager to EPA's A Citizen's Guide to
Radon and Consumer's Guide to Radon
Reduction and/or mitigate in accordance
with AARST Radon Mitigation Standards
for Multifamily Buildings, RMS-MF 2014.
> 4 pCi/L Mitigate in accordance with AARST
Radon Mitigation Standards for
Multifamily Buildings, RMS-MF 2014.
> 4 pCi/L
Complete all foundation air
sealing strategies as part of
building upgrade work.
< 4 pCi/L No further minimum action. For post-work radon levels between 2 and
4 pCi/L, refer building owner/property
manager to EPA's A Citizen's Guide to
Radon and Consumer's Guide to Radon
Reduction and/or mitigate in accordance
with AARST Radon Mitigation Standards
for Multifamily Buildings, RMS-MF 2014.
> 4 pCi/L Refer building owner to EPA's
A Citizen's Guide to Radon and
recommend radon mitigation in
accordance with AARST Radon
Mitigation Standards for Multifamily
Buildings, RMS-MF 2014.
Mitigate in accordance with AARST Radon
Mitigation Standards for Multifamily
Buildings, RMS-MF 2014.
No Pre-Work Test
Consider precautionary
radon-reduction actions as
part of building upgrade
work, especially covering
exposed earth, air sealing
open sumps, and ensuring
floor drains have traps and
that the traps are not dry.
< 4 pCi/L No further minimum action. For post-work radon levels between 2 and
4 pCi/L, refer building owner/property
manager to EPA's A Citizen's Guide to
Radon and Consumer's Guide to Radon
Reduction and/or mitigate in accordance
with AARST Radon Mitigation Standards
for Multifamily Buildings, RMS-MF 2014.
> 4 pCi/L Mitigate in accordance with AARST
Radon Mitigation Standards for
Multifamily Buildings, RMS-MF 2014.
References for Priority Issue 5.0 Radon:
AARST: Protocol for Conducting Radon and Radon Decay Product Measurements in Multifamily Buildings, ANSI/AARST MAMF-2012
AARST: Radon Mitigation Standards for Multifamily Buildings, RMS-MF 2014
ASTM: C920-14a Standard Specification for Elastomeric Joint Sealants
EPA: A Citizen's Guide to Radon
EPA: Consumer's Guide to Radon Reduction
EPA: Indoor airPLUS Construction Specifications
EPA: Map of Radon Zones Including State Radon Information and Contacts
EPA: Where Can I Get a Radon Test Kit?
1. Note: If the building upgrade involves installation of insulation that moves the thermal boundary to the roof, making the attic a conditioned space, take
precautions to ensure that any active radon mitigation system does not result in radon levels that are equal to or greater than 4 pCi/L in the attic.
