The following uses and activities shall be exempt from noise level regulations:
A. Noise of safety signals, warning devices and emergency pressure relief valves;
B. Noise resulting from any authorized emergency vehicle when responding to an emergency call or acting in time of emergency;
C. Noise resulting from emergency work, as determined by the director of the Salt Lake Valley board of health or such director's designee;
D. Noise resulting from lawful fireworks and noisemakers used for celebration of an official holiday;
E. Any noise resulting from activities of temporary duration permitted by law for which a license or permit has been approved by the director of the Salt Lake Valley health department in accordance with section 9.28.070 of this chapter, or its successor section. (Ord. 1-06 § 30, 2006: prior code § 18-33-6)