Environmental

Colorado's 'radon in schools' program requires:

AA. Radon testing only in new school construction
BB. Testing all Colorado public school buildings for radon and mitigating schools where levels exceed the EPA action level of 4 pCi/L✓ Correct
CC. Annual radon testing in all residential properties
DD. Radon disclosure only when selling commercial properties

Explanation

Colorado has one of the highest radon concentrations in the nation. Colorado's radon program requires public school buildings to be tested and mitigated when levels exceed the EPA action level of 4 picocuries per liter (pCi/L). Colorado also strongly encourages residential radon testing.

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