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