Active Soil Depressurization
The
primary method of reducing radon or Volatile Organic Compounds
(VOC's) is active soil depressurization. A fan and piping system is
used to draw enough air from the soil beneath a home or building and
exhaust it safely above the roof. This causes the air pressure in the
soil to be negative in comparison to the inside of the structure. This
negative pressure prevents soil gas from entering into the home or
building. Active soil depressurization systems can be used to reduce
radon in buildings built on slabs, crawl spaces or basements.
Crawlspace Membrane Depressurization System
This remediation system is used when the home or commercial building has a crawlspace. The crawlspace is encapsulated with a radon retarder membrane is used to cover the dirt in the entire crawlspace. The membrane runs up the walls and piers and is mechanically fastened and sealed with mastic to make the entire membrane gas tight. A PVC pipe that connects to an exterior blower and exhaust pipe is then installed under the gas tight membrane to reduce the radon level below the action level set by the US EPA.
