radon retest after mitigation 2

https://mypadepradonstandardsfocus.fairmontdigest.com/posts/understanding-pa-dep-radon-standards-for-york-county-homeowners

After installing a radon mitigation system, it's crucial to retest the air to confirm it's working. You'll want to wait at least 48 hours, then run a short-term test in the lowest lived-in level. This retest verifies levels have dropped below the EPA action guideline of 4 pCi/L, ensuring your family's exposure is minimized.