(1) Noise originating from aircraft in flight;

(2) Noise created by safety and protective devices, such as relief values where noise suppression would defeat the safety release intent of the device;

(3) Noise created by fire alarms;

(4) Noise created by emergency equipment, including, but not limited to, emergency standby or backup equipment, and emergency work necessary in the interests of law enforcement or of the health, safety or welfare of the community; and including, but not limited to, any emergency work necessary to replace or repair essential utility services;

(5) Noise created by auxiliary equipment on motor vehicles used for highway maintenance;

(6) Noise originating from officially sanctioned parades, sporting events, and other public events;

(7) Noise created by warning devices not operated continuously for more than 30 minutes per incident;

(8) Noise originating from existing natural gas transmission facilities, subject to any requirements that may be established by appropriate state or federal agencies;

(9) Noise created by existing stationary equipment used in the conveyance of water by a utility and noise created by existing electrical substations;

(10) Noise created by the operation of equipment or facilities by a railroad in interstate commerce;

(11) Noise emanating from temporary construction sites except between the hours of 10:00 p.m. and 7:00 a.m., on weekdays, and except between the hours of 6:00 p.m. and 8:00 a.m. on Saturdays, Sundays, and state recognized holidays;

(12) Noise emanating from marine-oriented construction sites except between the hours of 10:00 p.m. and 7:00 a.m. on weekdays and weekends;

(13) Noise created by aircraft-engine testing and maintenance not related to flight operations, except between the hours of 10:00 p.m. and 7:00 a.m.;

(14) Noise created by existing stationary equipment used in the conveyance of water by a utility and noise created by existing electrical substations. (Ord. 1523 § 1 (Att. A), 2023).