511.10  MANUFACTURING ZONING DISTRICT REGULATIONS.
   In Manufacturing Zoning Districts, inclusive, at no point on the boundary of a Residence, Retail or Commercial Zoning District shall the sound pressure level of any individual operation or plant, or the combined operations of any person, firm or corporation, exceed the decibel levels in the designated octave bands shown below for the Zoning Districts indicated as measured under the test procedures established by Section 511.13
Octave Band Center Frequency (Hz)

Maximum Sound Pressure Levels (dB)
 

Residence
Retail and Commercial
 
DAYTIME
31.5
77
84
63
76
83
125
70
77
250
62
69
500
56
63
1000
50
57
2000
44
51
4000
39
46
8000
37
44
A-scale levels (for monitoring purposes )
60 dB(A)
67 dB(A)
 
NIGHTTIME
31.5
67
74
63
66
73
125
60
67
250
52
59
500
46
53
1000
40
47
2000
34
41
4000
29
36
8000
27
34
A-scale levels (for monitoring purposes)

50 dB(A)

57 dB(A)
   In Retail and Commercial Zoning Districts, all activities involving the production, processing, cleaning, servicing, testing, repair of materials, goods or products, or any property use shall conform with the performance standards stated above, provided that performance standards shall in every case be applied at the boundaries of the lot on which any such activities take place.
   In Residential Zoning Districts, any property use shall conform with the performance standards stated above for Residence District boundaries, provided that performance standards shall in every case be applied at the boundaries of the lot on which such use is established.
   The maximum sound pressure levels established in this section to be applied to the boundaries of a lot shall not apply to construction sites.  Construction sites noise levels shall be regulated by Sections 511.07(a)(1) and 511.05.
(Ord. 103-82.  Passed 9-7-82.)