Radon questions well answered 2023/2024

Radon EPA recommends mitigation of radon at what level - correct answer Greater than or equal to 4 pci/l EPA Home Buyer and Sellers Guide specifically deals with - correct answer home purchases and sales, and the potential for radon device interference EPA recommends testing radon in - correct answer the lowest level that could be used regularly What percentage of homes in the US have elevated radon levels - correct answer 1 in 15 According to EPA - If you decide to finish or renovate an unfinished area of the home in the future, a radon test should be done - correct answer before starting the project and after the project is finished. According to EPA, what are 5 radon resistant features - correct answer 1. Gas-permeable Layer 2. Plastic Sheeting 3. Sealing and Caulking 4. Vent Pipe 5. Junction Boxes Gas‑Permeable Layer - correct answer This layer is placed beneath the slab or flooring system to allow the soil gas to move freely underneath the house. In many cases, the material used is a 4-inch layer of clean gravel. This gas-permeable layer is used only in homes with basement and slab-on-grade foundations; it is not used in homes with crawlspace foundations. Plastic Sheeting - correct answer Plastic sheeting is placed on top of the gas-permeable layer and under the slab to help prevent the soil gas from entering the home. In crawl spaces, the sheeting (with seams sealed) is placed directly over the crawlspace floor.