(A) Maximum permissible continuous sound pressure levels.
(1) It shall be unlawful for any reason to operate or cause or permit to be operated any stationary source of noise which creates a sound pressure level that exceeds the limits set forth in the following table for more than 90% of any measurement period. This measurement shall not be less than ten minutes when measured at the property boundary or at any point within the property affected by the noise.
Use District | Day 7:00 a.m. – 9:00 a.m. | Night 9:00 p.m. – 7:00 a.m. |
Residential | 55 | 50 |
Commercial | 60 | 55 |
Industrial | 70 | 65 |
(2) Noise levels for any PUD shall conform with this table and shall be determined by the predominant land use as set forth in the PUD plan.
(B) District boundaries. When a noise source can be identified and its noise is measured in more than one use district, the sound pressure level limits of the most restrictive use district shall apply at that district boundary.
(C) Duration correction. It shall be unlawful for any person to operate or permit to be operated any stationary source of noise within any land use category which creates a fluctuating noise or is intermittent and creates a tenth percentile noise level which is more than 15 dB (A) greater than the ambient noise level, measured when the source is quiet, but in no case shall the tenth percentile level exceed 70 dB (A) in residential land use categories.
(D) Correction for character of sound. It shall be unlawful for any person to operate or cause or permit to be operated any stationary source of noise which emits a pure tone, cyclically varying noise or repetitively impulsive noise which exceeds 5 dB (A) less than the limits set in this section.
(E) Exemption for school bands. The performance of any senior high school or junior high school band shall be exempt from the sound pressure level standards of this chapter.
(Ord. D-166, passed 12-8-1998)