420 ILCS 52/15
As used in this Act, unless the context requires otherwise:
"Active mitigation system", also known as "active soil depressurization" or "ASD", means a family of radon mitigation systems involving mechanically driven soil depressurization, including sub-slab depressurization (SSD), drain tile depressurization (DTD), block wall depressurization (BWD), and sub-membrane depressurization (SMD).
"Agency" means the Illinois Emergency Management Agency.
"New residential construction" means any original construction of a single-family home or a dwelling containing 2 or fewer apartments, condominiums, or town houses.
"Passive new construction pipe" means a pipe installed in new construction that relies solely on the convective flow of air upward for soil gas depressurization and may consist of multiple pipes routed through conditioned space from below the foundation to above the roof.
"Radon" means a gaseous radioactive decay product of uranium or thorium.
"Radon contractor" means a person licensed in accordance with the Radon Industry Licensing Act to perform radon or radon progeny mitigation or to perform measurements of radon or radon progeny in an indoor atmosphere.
"Radon resistant construction" means the installation of passive new construction pipe during new residential construction.
"Residential building code" means an ordinance, resolution, or law that establishes standards applicable to new residential construction.
"Residential building contractor" means any individual, corporation, or partnership that constructs new residential construction.
420 ILCS 52/15