8.12.090 Exemptions to noise regulations.

(A) Emergency Exemption. The provisions of this chapter shall not apply to:

(1) The emission of sound for the purpose of alerting persons to the existence of an emergency; or

(2) The emission of sound in the performance of emergency work.

(B) Warning Devices. Warning devices necessary for the protection of public safety, as for example police, fire and ambulance sirens, and train horns, shall be exempted from the provisions of this chapter.

(C) Outdoor Activities. The provisions of this chapter shall not apply to temporary events as defined in Chapters 5.05 and 12.04, provided such events are conducted pursuant to licenses issued pursuant to Chapters 5.05 and 12.04, respectively, of this code and then only as specifically required by such chapters or any manual of standards adopted by resolution of the city council for the purpose of implementing such chapters.

(D) Preexisting Noise Sources. Those commercial and industrial operations in existence prior to the date of adoption of the ordinance codified in this chapter, if it can be shown that compliance with the provisions in this chapter constitutes a hardship in terms of technical and economic feasibility, a variance may be granted until such time as compliance may be effected.