Any noise source which does not produce a noise level exceeding seventy dBA at a distance of twenty-five feet from the noise source under its most noisy condition of use shall be exempt from the provisions of Article 4 between the hours of eight a.m. and eight p.m. daily except Sundays and holidays, when the exemption herein shall apply between ten a.m. and six p.m.
(Ord. 275-86 § 1, 1986)
Aural warning devices which are required by law to protect the health, safety and welfare of the community shall not produce a noise level more than three dBA above the standard or minimum level stipulated by law.
(Ord. 275-86 § 1, 1986)
Notwithstanding any other provision of this chapter, between the hours of eight a.m. and eight p.m. daily except Saturday, when the exemption herein shall apply between nine a.m. and eight p.m. and Sundays and holidays, when the exemption herein shall apply between ten a.m. and six p.m., construction, alteration, or repair activities which are authorized by valid City permit shall be allowed if they meet at least one of the following noise limitations:
A. 
No individual piece of equipment shall produce a noise level exceeding eighty-three dBA at a distance of twenty-five feet. If the device is housed within a structure on the property, the measurement shall be made outside the structure at a distance as close to twenty-five feet from the equipment as possible.
B. 
The noise level at any point outside the property plane of the project shall not exceed eighty-six dBA.
(Ord. 275-86 § 1, 1986)