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.)