§ 17.28.090. Noise.

A.

Applicability. These standards apply to continuous and intermittent noise from machinery or equipment, noise emitted by speaker boxes, pick-up and delivery trucks, and any other commercial or industrial activities which are under the control of the occupant of a lot or a parcel legally recorded at the time of adoption of the ordinance codified in this title. The following provisions shall not apply to airport, heliport, railroad station, rail yard or mineral extraction land uses.

B.

Method of Measurement. Noise shall be measured with a sound level meter (Type 1 or Type 2) which meets the standards of the American National Standards Institute (ANSI) Section S 1.4-1979, or as superseded. Noise levels shall be measured using an A-weighted sound pressure level scale. Impact noises, produced when two or more objects strike each other, shall be measured using the fast response of the sound level meter, and other noises using the slow response. For purposes of this title, impact noises shall be considered to be those noises whose peak values are more than three decibels higher than the values indicated on the sound level meter.

C.

Maximum Permitted Sound Levels. The maximum permitted sound pressure levels in decibels across lot lines or district boundaries shall be in accordance with following table. This table shall be used to determine the maximum noise level, measured in A-weighted decibels, which shall be permitted at the property line of the closest use in each of the following categories.

Table 17.28.090
MAXIMUM SOUND LEVELS (dBA)

Adjacent Land Use	Sound Level Limit (dBA)
	7:00 a.m. to 7:00 p.m.	7:00 p.m. to 7:00 a.m.
Industrial and agricultural	75	75
All others	65	60

 

(Ord. 96-555 § 7.2(C), 1997)