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High radon levels in a Minnesota (USA) basement with a passive under slab vent pipe system can be seen in the left half of the graph. After installation of a radon fan (ASD), a permanent reduction in radon levels to approximately 0.6 pCi/L can be seen in the right half of the graph. The most common approach is active soil depressurization (ASD).
Installing a radon sump system in the basement; Sealing floors and walls (not a stand-alone solution); and; Installing a positive pressurization or positive supply ventilation system. The half-life for radon is 3.8 days, indicating that once the source is removed, the hazard will be greatly reduced within approximately one month (seven half-lives).
Radon concentrations can vary daily, and accurate radon exposure estimates require long-term average radon measurements in the spaces where an individual spends a significant amount of time. [ 173 ] Radon levels fluctuate naturally, due to factors like transient weather conditions, so an initial test might not be an accurate assessment of a ...
Liebert Corporation, headquartered in Westerville, Ohio, produced electric power systems, precision cooling equipment, server racks and integrated cabinets, and related infrastructure management and services. In 1987, it was acquired by Emerson Electric. In 2000, it was folded into Emerson Network Power, which became Vertiv in 2016.
Advanced Drainage Systems, Inc. (ADS) is a company that designs, manufactures and markets polypropylene and polyethylene pipes, plastic leach field chambers and systems, septic tanks and accessories, storm retention/detention and septic chambers, polyvinyl chloride drainage structures, fittings, and water filters and water separators. [1]
The Solid Waste Authority of Central Ohio (SWACO) was established by the Ohio General Assembly in 1989 as part of Ohio House Bill 592, which created Ohio’s current solid waste management planning and regulatory programs.
In 2024, we reduced our purchased transportation cost by 32%, driven by a reduction of more than 600 basis points in linehaul miles outsourced to third parties.
Crawl spaces can be actively or passively vented, or closed. An advantage of a vented crawl space is that harmful gases such as radon or carbon monoxide (e.g. from gas furnaces or water heaters) can escape or be diluted before they can enter the living space. [5]