crawl space radon mitigation 3

https://wiki-square.win/index.php/Why_PA_DEP_Certified_Radon_Testing_Matters_for_Homeowners

When we bought our fixer-upper, the crawl space radon mitigation ended up being simpler than we feared. Our contractor sealed the dirt floor with thick plastic sheeting, taped the seams, and installed a vent pipe running the gas up and out through the roof. Now the test readings went from 10 pCi/L down to well under 2, making the basement safe to finish. We just run a small fan continuously, and the meter’s been green ever since.