R307-431-2. Definitions

"Boiler" means the same as defined in Section R307-316-3. "Confined Blasting" means the same as defined in Section R307-306-2. "Controlled Landfill" means the same as defined in 40 CFR 62.16730. "Emergency Engine" means emergency stationary reciprocating internal combustion engine (RICE) as defined in 40 CFR 63.6675. "Hydroblasting" means the same as defined in Section R307-306-2. "Major Source" means the same as defined in Section R307-101-2. "Municipal Solid Waste Landfill" means the same as defined in 40 CFR 62.16730. "Process Heater" means the same as defined in Section R307-316-3. "Unconfined Blasting" means the same as defined in Section R307-306-2. "Wet Abrasive Blasting" means the same as defined in Section R307-306-2. "Vapor Mitigation System," or VMS, is a sub-slab system whose primary purpose is mitigating vapor intrusion into an occupied, or occupiable, structure and is not intended or designed for the remediation of contaminated soil or groundwater. This definition includes both active and passive systems. Passive systems consist of a vapor barrier either below or above the slab of a structure and a venting system installed under a structure to divert vapor from beneath the structure to the sides or roofline of a structure. Active systems are similar to passive systems but incorporate a blower or fan to actively extract air from beneath the structure.