Radon Mitigation Systems in Granville, OH

Radon Mitigation Systems in Granville involves sub-slab depressurization with an inline radon fan, sealed slab penetrations, and an exterior discharge stack above the eave line, working on the slab-to-soil interface and any below-grade openings where soil gas enters the home. The service is the standard installation for any Columbus home testing above the EPA action level of 4.0 pCi/L on a 90-day or annual long-term average.

Granville's historic village core, much of it built in the early 1800s around Denison University, sits on stone and rubble-masonry foundations where soil gas typically enters through the porous wall itself rather than a single crack. Licking County is in EPA radon Zone 1, and the newer subdivisions built at the edges of the village since the 1980s sit on poured basements or slabs where a conventional sub-slab suction point is the more straightforward fix. Granville sits in the valley of Raccoon Creek and the South Fork Licking River, and the village's historic district limits exterior alteration on much of the pre-1950 core. Granville sits on geology that drives elevated regional radon exposure across the Columbus metro, including Licking County.

Licking County sits in EPA radon Zone 1 on till-plain soils over shale bedrock, and the install approach splits between the county's older poured-basement core and the newer subdivisions built at village edges since the 1980s, where a sump pit is already in place and the suction system integrates directly with it.

In Ohio, radon mitigation is licensed work under ORC Chapter 3723 (Ohio Department of Health Radon Licensing Program), done to the state rules in OAC 3701-69; the consensus standard for existing homes is ANSI/AARST SGM-SF-2023. The Ohio Department of Health Radon Licensing Program oversees radon program compliance for Granville, and Ohio licensure under ORC 3723.02 applies to any contractor performing mitigation work in the state.