§ 41A-7. Exterior noise standards.

(a)

The following noise standards, unless otherwise specifically indicated in this chapter, shall apply to all noise sensitive exterior areas within Butte County.

	Daytime (7 a.m. to 7 p.m.)		Evening (7 p.m. to 10 p.m.)		Nighttime (10 p.m. to 7 a.m.)
	Designation
Noise Level Descriptor	Urban	Non-Urban	Urban	Non-Urban	Urban	Non-Urban
Hourly Average (L eq )	55	50	50	45	45	40
Maximum (L max )	70	60	60	55	55	50

 

(b)

It is unlawful for any person at any location within the County to create any noise which causes the noise levels on an affected property, when measured in the designated exterior location, to exceed the noise standards specified above.

(c)

Each of the noise limits specified in subdivision (a) of this section shall be reduced by five (5) dBA for recurring impulsive noise, simple or pure tone noise, or for noises consisting of speech or music.

(d)

Noise level standards, which are up to five (5) dBA less than those specified above, based upon determination of existing low ambient noise levels in the vicinity of the project site may be imposed.

(e)

In urban areas, the exterior noise level standard shall be applied to the property line of the receiving property. In non-urban areas, the exterior noise level standard shall be applied at a point one hundred (100) feet away from the residence or at the property line if the residence is closer than one hundred (100) feet. The above standards shall be measured only on property containing a noise sensitive land use.

(Ord. No. 4053, § 1, 3-26-13)