NR 440.688(2)(p)(p) “Nonmetallic mineral processing plant” means any combination of equipment that is used to crush or grind any nonmetallic mineral wherever located including lime plants, power plants, steel mills, asphalt concrete plants, portland cement plants, or any other facility processing nonmetallic minerals except as provided in sub. (1) (b) and (c). NR 440.688(2)(q)(q) “Portable plant” means any nonmetallic mineral processing plant that is mounted on any chassis or skids and may be moved by the application of a lifting or pulling force. In addition, there may be no cable, chain, turnbuckle, bolt or other means (except electrical connections) by which any piece of equipment is attached or clamped to any anchor, slab, or structure, including bedrock, that must be removed prior to the application of a lifting or pulling force for the purpose of transporting the unit. NR 440.688(2)(r)(r) “Production line” means all affected facilities (crushers, grinding mills, screening operations, bucket elevators, belt conveyors, bagging operations, storage bins, and enclosed truck and railcar loading stations) which are directly connected or are connected together by a conveying system. NR 440.688(2)(s)(s) “Screening operation” means a device for separating material according to size by passing undersize material through one or more mesh surfaces (screens) in series, and retaining oversize material on the mesh surfaces (screens). NR 440.688(2)(t)(t) “Size” means the rated capacity in tons per hour of a crusher, grinding mill, bucket elevator, bagging operation, or enclosed truck or railcar loading station; the total surface area of the top screen of a screening operation; the width of a conveyor belt; and the rated capacity in tons of a storage bin. NR 440.688(2)(u)(u) “Stack emissions” means the particulate matter that is released to the atmosphere from a capture system. NR 440.688(2)(v)(v) “Storage bin” means a facility for storage, including surge bins, for nonmetallic minerals prior to further processing or loading. NR 440.688(2)(w)(w) “Transfer point” means a point in a conveying operation where the nonmetallic mineral is transferred to or from a belt conveyor except where the nonmetallic mineral is being transferred to a stockpile. NR 440.688(2)(x)(x) “Truck dumping” means the unloading of nonmetallic minerals from movable vehicles designed to transport nonmetallic minerals from one location to another. Movable vehicles include but are not limited to: trucks, front end loaders, skip hoists, and railcars. NR 440.688(2)(y)(y) “Vent” means an opening through which there is mechanically induced air flow for the purpose of exhausting from a building air carrying particulate matter emissions from one or more affected facilities. NR 440.688(2)(ym)(ym) “Wet mining operation” means a mining or dredging operation designed and operated to extract any nonmetallic mineral regulated under this section from deposits existing at or below the water table, where the nonmetallic mineral is saturated with water. NR 440.688(2)(z)(z) “Wet screening operation” means a screening operation at a nonmetallic mineral processing plant that removes unwanted material or that separates marketable fines from the product by a washing process which is designed and operated at all times such that the product is saturated with water. NR 440.688(3)(a)(a) On and after the date on which the performance test required to be conducted by s. NR 440.08 is completed, no owner or operator subject to the provisions of this section may cause to be discharged into the atmosphere from any transfer point on belt conveyors or from any other affected facility any stack emissions which meet both of the following criteria: NR 440.688(3)(a)2.2. Exhibit greater than 7% opacity, unless the stack emissions are discharged from an affected facility using a wet scrubbing control device. Facilities using a wet scrubber shall comply with the reporting provisions of sub. (7) (c) to (e). NR 440.688(3)(b)(b) On and after the sixtieth day after achieving the maximum production rate at which the affected facility will be operated, but not later than 180 days after initial startup as required under s. NR 440.11, no owner or operator subject to the provisions of this section may cause to be discharged into the atmosphere from any transfer point on belt conveyors or from any other affected facility any fugitive emissions which exhibit greater than 10% opacity except as provided in pars. (c) to (e). NR 440.688(3)(c)(c) On and after the sixtieth day after achieving the maximum production rate at which the affected facility will be operated, but not later than 180 days after initial startup as required under s. NR 440.11, no owner or operator may cause to be discharged into the atmosphere from any crusher, at which a capture system is not used, fugitive emissions which exhibit greater than 15% opacity.