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HomeMy WebLinkAboutOrdinance 827LIE N;E. 788-9221 CITY OF COLUMBIA HEIGHTS ADMINISTRATIVE OFFICES EQUAL OPPORTUNITY EMPLOYER · COLUMBIA HEIGHTS, MINNESOTA 55421 ORDINANCE #827 BEING AN ORDINANCE AHEND1NG COLUHBIA HEIGHTS ZONING CODE, ORDINANCE NO. 818 SECTION 1. Section 17.9(1) of Columbia Heights Zoning Code, Ordinance No. 818, passed August 12, 1974 which reads as follows: Section 17.9 (1) Noise A. Refe ren ces: The following documents shall govern definitions, methods, and other matters relating to sound and noise. Said documents are incorporated herein by reference: l. American National Standards Institute ANSI S]. ] ANSI Sl.4 ANSI St.5 ANSI Sl.8 Acoustic terminology Specifications of general purpose sound level meters. Preferred frequencies for acoustical meas u remen ts. Reference quantities for acoustical levels. ANSI Sl.13 Methods for measurement of sound pressure levels. 2. Environmental Protection Agency EPA levels Document- Sound levels requisite to protect the public health and welfare in the env i ronment. 3. International Standards Organization ISO/R 1966 Acoustics - assessment of noise with respect to community response. Bo As a method of screening for probable non-compliance the following levels are established as primary levels, the exceeding of which shall be cited as in violation of this ordinance, and requiring abatement: During the hours of 7:00 A.M. and 10.'00 p.m. ZONE Res ident ial Comme rcl a 1 Industrial At all other times: ZONE Res i dent ial Commercial Industrial Average Sound Level 55dBA 65dBA 75dBA AVERAGE SOUND LEVEL 45dBA 50dBA 70dBA All measurements to be made at the lot line with an ANSI S1.4 Type 2 meter or better, set for slow damping and a-weighted response and used according to ANSI standard Sl.13 methods. If the sound measured is impulsive, staccato, or contains prominent pure tones, as defined and measured according to ANSI Standards, the levels of (B.) above shall be lowered in all cases by 5 decibels, a-weighted. is amended to read as follows: Section 17.9(1) Noise A. Maximum governing noise limitations measured at property 1 ine: OCTAVE BANDS CENTERED ON SOUND LEVELS IN DECIBELS Residential District Non-Residential 63 H ~ 59 70 125 H ~ 54 66 250 H ~ 50 62 5OO H ~ 45 59 1000 H ~ 40 55 2000 H ~ 36 5t 4000 H ~ 33 48 800O H ~ 33 48 B. References: Ce The following documents shall govern definitions, methods and other matters relating to sound and noise; said documents, copies of which are on~ file in the office of the City Clerk, are herein incorporated by reference and made a part hereof: 1. American National Standards Institute ANSi SI.I ANSI Sl.4 ANSI Sl.5 ANSI SI.8 Acoustic terminology Specifications of general purpose sound level meters. Preferred frequencies for acoustical measurements. Reference quantities for acoustical levels. ANSI Sl.13 Methods for measurement of sound pressure levels. 2. Environmental Protection Agency EPA Levels Document - Sound levels requisite to protect the public health and welfare in the environment. 3. International Standard Organization ISO/R 1999 - 1966 Acoustics - assessment of noise exposure during work for hearing conservation purposes. As a method of screening for probable non-compliance the following levels are established as primary levels, the exceeding of which shall be cited as in violation of this ordinance, and requiring abatement: During the hours of 7:00 A.M. and lO:O0 P.M. Zone Average Sound Level Res'i"de~tial 55 dBA Commercial 65 dBA Industrial 75dBA At all other times Zone Average Sound Level Residential 45 dBA Commercial 50 dBA Industrial 70 dBA SECTION 2. All measurements to be made at the lot line with an ANSI Sl.4 Type 2 meter or better, set for slow damping and a-weighted response and used according to ANSI standard Sl.13 methods. If the sound measured is impulsive, staccato, or contains prominent pure tones, as defined and measured according to ANSI Standards and the EPA levels document, the levels of (C) above shall be lowered in all cases by 5 decibels, a-weighted, and those of (A) above, by 5 decibels in each octave band. This ordinance shall be in full force and effect from and after thirty (30) days after its pass~ge. First reading: August 26, 1974 Second reading: September 24, 1974 Offered by: Norberg Seconded by: Land Roll call: All ayes Secretary to the Council Bruce G. Nawrocki, Mayor