§ 10-304. Use district noise levels.

(a)

Maximum permissible sound levels. It shall be a violation of this article for any person to operate or permit to be operated any stationary source of sound which either:

(1)

Creates a sound level greater than 15dB(A) above the ambient sound level (L ₉₀ ) within any land use district during any measurement period; or

(2)

Creates a ninetieth percentile sound level (L ₉₀ ), a tenth percentile sound level (L ₁₀ ) or a first percentile sound level (L ₁ ) for any measurement period which exceeds the limits set forth for the following receiving land use districts when measured at the boundary or at any point within the property affected by the noise:

	L 90		L 10		L 1;
Use District	9pm— 7am	7am— 9pm	9pm— 7am	7am— 9pm	9pm— 7am	7am— 9pm
Residential	50dB(A)	55dB(A)	60dB(A)	65dB(A)	65dB(A)	70dB(A)
Commercial	55dB(A)	60dB(A)	65dB(A)	70dB(A)	70dB(A)	75dB(A)
Industrial	65dB(A)	70dB(A)	75dB(A)	80dB(A)	80dB(A)	85dB(A)

 

When a noise source can be identified and its noise measured in more than one land use category, the limits of the most restrictive use shall apply at the boundaries between different land use categories. For the purpose of enforcing these provisions a measurement period shall not be less than five (5) minutes nor more than fifteen (15) minutes.

(b)

Correction for character of sound.

(1)

For any stationary source of sound which emits a pure tone, cyclically varying sound or repetitive impulsive sound, the limits set forth in subsection (a) above shall be reduced by 5 dB(A).

(2)

Notwithstanding compliance with part (1) of this subsection, it shall be a violation of this ordinance for any person to operate or permit to be operated any stationary source of sound which emits a pure tone, cyclically varying or repetitive impulsive sound which creates a noise disturbance.

(Ord. No. 0-7778-9; Ord. No. 0-8081-5; Ord. No. 0-8283-110)