Radon Facts - Panasonic PT-DZ12000U Operating Instructions Manual

1 working level
1 working level-month = 1 pCi / L in air thru evaporation
EPA ACTION LEVELS FOR RADON GAS IN HOMES
Concentration (pCi / L)
EPA Recommends Mitigation at > 4 pCi / L
4 pCi / L in living area = 1.03 working level-month = 1 rem
Maximum Contaminant Level (MCL) is 300 pCi / L of radon in
water of community water systems (CWS).
Alternative Maximum Contaminant Level (AMCL) is 4,000 pCi
/ L of radon in water of community water systems.
To comply with the AMCL limit the state or the CWS
(Community Water System) must implement a Multi-Media
Mitigation plan to address the radon in the air of residences.
The proposed rule would not apply to CWSs that use solely
surface water.
The proposed rule requires monitoring for radon in drinking
water. The monitoring frequency varies from once per quarter
to once in 9 years based on radon concentrations.

RADON FACTS

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0 - 4
4 -20
20 -200
> 200
PROPOSED EPA ACTION LEVELS
FOR RADON IN DRINKING WATER
222
3 DAC Rn
1.3E5 MeV / liter of air
100 pCi / liter (1E-7 uCi / mL)
20.8 uJoules / M
Sampling Frequency
initial and no follow up
one year and follow up
3 months and follow up
Implement radon reduction methods
(including progeny)
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energy
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