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Article 6: Development Standarg <br /> Section 6.4: Performance Standards <br /> 6.4.3 Noise <br /> (A) General Standards <br /> (1) Sound levels shall be measured with an A-weighted filter, constructed in <br /> accordance with the specifications of the American National Standards Institute, <br /> which automatically takes account of the varying effect on the human ear of <br /> different pitches. <br /> (2) All measurements shall be expressed in dB(A)to reflect the use of this A- <br /> weighted filter. <br /> (3) Impact Noises <br /> (a) Impact noises are sounds that occur intermittently rather than <br /> continuously. <br /> (b) Impact noises generated by sources that do not operate more than one <br /> minute in any one hour period are permissible up to a level of 10dbA in <br /> excess of the figures listed in Table 6.4.3.B. This exception shall not <br /> apply from 7:00 pm to 7:00 am when the adjacent lot is used or zoned for <br /> residential purposes. <br /> (c) The impact noise shall be measured using the fast response of the <br /> sound level meter. <br /> (4) Noise levels resulting from temporary construction or other temporary activity that <br /> occurs between 7:00 am and 7:00 pm shall be exempt from the requirements of <br /> this subsection. <br /> (5) Noise levels for the extraction of earth products and landfills shall be as set forth <br /> in Sections 5.11 and 5.12. <br /> (B) Commercial, Industrial, and Conditional Zoning Districts <br /> (1) Within the LC-1, G- 0/RM, El, or I-1 district, no permitted Principal Use, Special <br /> Use or Accessory Use shall generate noise that tends to have an annoying or <br /> disruptive effect upon uses located outside the immediate space occupied by that <br /> use. <br /> (2) The following table establishes the maximum permissible noise levels for <br /> permitted uses, special uses, conditional uses and accessory uses in the NC-2, <br /> CC-3, GC-4, EC-5, AS, 1-2, 1-3, and CZ districts: <br /> -ILTABLE 6.4.3.B: COMMERCIAL, INDUSTRIAL,AND CONDITIONAL ZONING DISTRICTS <br /> MAXIMUM PERMITTED SOUND LEVELS <br /> ZONING OF ADJACENT NOISE LEVEL LIMITS[DBA]FOR GENERATING LAND <br /> LOT OR TYPE OF USE ZONING OF DEVELOPMENT SITE USE <br /> IF CONDITIONAL OR <br /> "OTHER"DISTRICT 7:00 PM TO 7:00 AM 7:00 AM TO 7:00 PM <br /> NC-2, 1-2 1 50 60 <br /> Residential CC-3, GC-4, EC-5, 50 60 <br /> 1-3,AS, CZ Districts 2 <br /> NC-2, 1-2 1 60 65 <br /> Commercial CC-3, GC-4, EC-5, 65 70 <br /> 1-3,AS, CZ Districts 2 <br /> NC-2, 1-2 1 65 70 <br /> Industrial CC-3, GC-4, EC-5, 70 75 <br /> 1-3,AS, CZ Districts 2 <br /> NOTES: <br /> [1] Measurements shall be taken at the boundary line of the zoning lot. <br /> 2 Measurements shall be taken at the boundar line of the zonin• district. <br /> Orange County, North Carolina—Unified Development Ordinance Page 6-10 <br />