Except for extraction uses to which this section shall not apply and for which the City Council may establish conditions, any use established in a commercial, office or industrial district after the effective date of this chapter shall be so operated as to comply with the performance standards established hereinafter. No use lawfully established on the effective date of this chapter shall be so modified or altered as to conflict with the performance standards established herein.
   (A)   Noise.  The volume of sound inherently and recurrently generated shall be controlled so as not to become a nuisance to adjacent uses. Noises shall not exceed 60 dBA at or beyond the adjacent lot line, as measured with a sound level meter and impact noise analyzer meeting the applicable standards of the American National Standards Institute (ANSIS 1.4-1971 and ANSIS 1.11-1966). The instrument shall be set to the A-weighted response scale, and the meter to the slow response. For impact noise levels, the value indicated above may be increased by 20 dB.
   (B)   Vibration.  An operation that creates intense, earthshaking vibrations, such as, heavy drop forges or heavy hydraulic surges, shall not be discernible beyond the property lines of the industry. The maximum peak particle velocities permitted at the lot line shall not exceed 0.05 inches per second. Ground-transmitted vibrations shall be measured with a seismograph or complement of instruments capable of recording vibration displacement, particle velocity, or acceleration and frequency simultaneously in three mutually perpendicular directions.
   (C)   Particulate matter.  No solid or liquid particles shall be emitted in such quantity as to be readily detectable any point along lot lines, or to produce a public nuisance or hazard beyond lot lines.
   (D)   Toxic or noxious matter.  No toxic or noxious matter shall be permitted to be discharged beyond lot lines in such quantity as to be detrimental to or endanger the public health, safety, comfort or welfare, or to cause injury or damage to property of business.
   (E)   Odorous matter. The emission of odorous matter from all sources on a lot shall not exceed four odor units per cubic foot across lot lines. Odor intensities shall be measured in accordance with ASTH Test Method D 1391-57 or in an equivalent manner.
   (F)   Glare. No direct or reflected glare shall be detectable from any residential zone boundaries.
(Ord. 21-016, passed 8-18-21)