23.47A.018

A. In an NC1, NC2 or NC3 zone, all manufacturing, fabricating, repairing, refuse compacting and recycling activities shall be conducted wholly within an enclosed structure. In a C1 or C2 zone, location within an enclosed structure is required only when the structure is located within 50 feet of a residential zone, except when required as a condition for permitting a major noise generator according to subsection 23.47A.018.B. Doors on such a structure that are further than 50 feet from the residential zone and that face away from the residential zone may remain open. B. Major Noise Generators. 1. The following uses are considered major noise generators: a. Light and general manufacturing; b. Major vessel repair; c. Aircraft repair shops; d. Major vehicle repair; e. Cargo terminals; f. Recycling; g. Other similar uses. 2. Exterior heat exchangers and other similar devices (e.g., ventilation, air-conditioning, refrigeration) are considered major noise generators. 3. When a major noise generator is proposed, or when an existing major noise generator is proposed to be expanded, a report from an acoustical consultant shall be required to describe the measures to be taken by the applicant in order to meet noise standards for the area. Such measures may include, for example, the provision of buffers, reduction in hours of operation, relocation of mechanical equipment, increased setbacks and use of specified construction techniques or building materials. Measures to be used shall be specified on the plans. After a permit has been issued, any measures that were required by the permit to limit noise shall be maintained. (Ord. 123046, § 32, 2009; Ord. 122311 , § 44, 2006.)