Agenda - 11-24-1980 - Laserfiche WebLink

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6,14.2 Noise a) within any LC-1, 01 and 1-1 district, no Permitted Principle Use, Special Use or Accessory Use shall generate noise that tends to have an annoying or disruptive effect upon uses located outside the immediate space occupied by that use. b) Table A below establishes the maximum permissible noise levels for permitted uses in the NC-2, CC-3, GC-4, 1-2 and 1-3 districts. Measurements shall be taken at the boundary lines of the zoning lot in the case of NC--2 and 1-2 districts and at the districts boundary lines for CC 3, GC-4, 1-3 and AS districts on which the use is located, and, as indicated the maximum permissible noise levels vary according to the zoning of the lot adjacent to the lot on which the use is located_ I Table A Maximum permitted Sound Levels dB(A). (re: 0,0002 Microbar) Zoning of Lot Zoning of Adjacent Lot Where use located Residential or PD Commercial. Industrial 7:00 am 7:00 pm 7:00 pm 7:00 am NC-2, 1-2 50 45 55 60 65 CC-3, GC-4, 1-3, AS 50 45 60 65 70 NOTE A: A decibel is a measure of a unit of sound pressure. Sound waves having the same decibel level "sound" laud or softer to the human ear depending upon the frequency of the sound wave in cycles per second (i.e., whether the pitch of the sound is high or low). Thus, an A-weighted filter, constructed in accordance with the specifications of the American National Standards Institute, which automatically takes account of the varying effect on the human ear of different pitches shall be used on any sound level measure- ments required by this section. Accordingly, all measure- ments are expressed in dB(A) to reflect the use of this A-- weighted filter. NOTE B: The standards established in Table A in terms of the Equi- valent sound Level (leg) which must be calculated by taking 100 instantaneous A-weighted sound levels at ten second intervals and computing the Leg in accordance with standard ANSI procedures. 6-16