§ 10.29.02 NOISE SOURCE REQUIREMENTS.

   These standards describe the limiting levels of sound established on the basis of present knowledge for the preservation of public health and welfare. These standards are consistent with speech, sleep, annoyance, and hearing conservation requirements for receivers within areas grouped according to land activities by the Noise Area Classification system established in subpart (b). However, these standards do not, by themselves, identify the limiting levels of impulsive noise needed for the preservation of public health and welfare. Noise standards in subpart (a) apply to all sources.

   (a)   Noise standards.

 

Noise Area Classification	Daytime		Nighttime
	L50	L10	L50	L10
1	60	65	50	55
2	65	70	65	70
3	75	80	75	80

 

   (b)   Noise Area Classification. The Noise Area Classification and the activities in each classification are listed below:

Noise Area Classification	Land Use Activities
1	Household Units (includes farm houses)
	Hotels, motels, or other overnight lodging
	Mobile home parks or courts
	Other residential units
	Motion picture production
	Medical and other health services
	Correctional institutions
	Educational services
	Religious activities
	Cultural activities and nature exhibitions
	Entertainment assembly
	Camping and picnicking areas (designated)
	Resorts and group camps
	Other cultural, entertainment, and recreational activities.
2	Railroad terminals (passenger and freight)
	Rapid rail transit and street railway passenger terminals
	Bus passenger terminals (intercity and local)
	Other motor vehicle transportation
	Airport and flying field terminals (passenger and freight)
	Marine terminals (passenger and freight)
	Automobile parking
	Transportation services and arrangements
	Wholesale trade
	Retail trade, including restaurants and bars
	Finance, insurance, and real estate services
	Personal services
	Business, legal, or other professional services
	Repair services
	Contract construction services
	Governmental services (except correctional institutions)
	Miscellaneous services (except religious activities)
	Public assembly (except entertainment assembly and race tracks)
	Amusements (except fairgrounds and amusement parks)
	Recreational activities (except designated camping and picnicking areas)
	Parks
3	Manufacturing
	Transportation (except passenger terminals)
	Highway and street right-of-way
	Communication
	Utilities
	Race tracks
	Fairgrounds and amusement parks
	Agricultural and related activities
	Forestry activities and related services (including commercial forest land, timber production, and other related activities)
	Fishing activities and related services
	Mining activities and related services
	Other resource production and extraction
	All other activities not otherwise listed.
4	Undeveloped and unused land area
	Noncommercial forest development
	Water areas
	Vacant floor area
	Under construction

 

   (c)   Measurement. Measurement of sound must be made at or within the applicable Noise Area Classification at the point of human activity which is nearest to the noise source. All measurements shall be made outdoors.

   (d)   Exceptions. The Noise Area Classification for a land use may be changed in the following ways if the applicable conditions are met.

      (1)   The daytime standards for Noise Area Classification 1 shall be applied to Noise Area Classification 1 during the nighttime if the land use activity does not include overnight lodging.

      (2)   The standards for a building in a Noise Area Classification 2 shall be applied to a building in a Noise Area Classification 1 if the following conditions are met:

         (i)   the building is constructed in such a way that the exterior to interior sound level attenuation is at least 30 dBA ;

         (ii)   the building has year-round climate control; and

         (iii)   the building has no areas or accommodations that are intended for outdoor activities.

      (3)   The standards for a building in a Noise Area Classification 3 shall be applied to a building in a Noise Area Classification 1 if the following conditions are met:

         (i)    the building is constructed in such a way that the exterior to interior sound level attenuation is at least 40 dBA ;

         (ii)    the building has year-round climate control; and

         (iii)    the building has no areas or accommodations that are intended for outdoor activities.

      (4)   The standards for a building in a Noise Area Classification 3 shall be applied to a building in a Noise Area Classification 2 if the following conditions are met:

         (i)   the building is constructed in such a way that the exterior to interior sound level attenuation is at least 30 dBA ;

         (ii)    the building has year-round climate control; and

         (iii)    the building has no areas or accommodations that are intended for outdoor activities.

(1958 Code, § 166.03) (Ord. 168, passed 1-8-1952; Ord. 75-49, passed 9-22-1975; Ord. 2006-49, passed 11-20-2006; Ord. 2009-2, passed 2-2-2009; Ord. 2009-36, passed 11-16-2009; Ord. 2012-2, passed 1-23-2012; Ord. 2015-6, passed 1-26-2015; Ord. 2021-33, passed 10-11-2021)