A. 
Purpose. All land uses, activities, and processes shall be operated and maintained to not be injurious to public health, safety, or welfare, and to comply with the standards in this Chapter.
B. 
Applicability. In addition to the City noise regulations established in Chapter 9.15 (Noise), the following performance standards shall apply to all activities and land uses in all zoning districts. The standards of this Chapter are assessed at the time of a new project development.
(Ord. 978, 11/17/2025)
A. 
Noise Measurement Criteria. Exterior noise levels shall be measured in decibels (dB) at the property line of the noise source. Noise shall be measured with a sound level meter which meets the standards of the American National Standards Institute (ANSI) Section S1.4-1979, Type 1 or Type 2. The unit of measure shall be designated as dB. A calibration check shall be made of the instrument at the time any noise measurement is made. Where noise is measured at the property line of abutting zoning districts, the noise standard for the more restrictive district shall apply.
B. 
Maximum Noise Levels. No use, activity, or process shall exceed the ambient noise levels established in Table 18.85-A.
Table 18.85-A: Maximum Noise Standards by Zoning District
Zoning District
Maximum Noise Level Ldn or CNEL, dB
Residential and Neighborhood Business Districts (R, NB)
50
Commercial and Retail Business Districts (RB, C)
60
Office District (PAO)
65
Industrial District (LI)
70
Planned Development/Precise Plan District (PUD, PPD)
Study Required
C. 
Duration and Timing. The maximum noise standards established in Table 18.85-A may be modified as follows to account for the effects of time and duration on the impact of noise levels:
1. 
In residential zones, the maximum noise level shall be five dB lower between 10:00 p.m. and 7:00 a.m.
2. 
Noise that is produced for no more than a cumulative period of five minutes in any hour may exceed the maximum noise level by five dB.
3. 
Noise that is produced for no more than a cumulative period of one minute in any hour may exceed the maximum noise level by 10 dB.
D. 
Acoustic Study. The Zoning Administrator may require an acoustic study for any proposed project which could have or create a noise exposure greater than that deemed acceptable for public health and safety.
E. 
Noise Attenuation Measures. The Zoning Administrator may require a project to include noise attenuation measures if deemed necessary to ensure that the noise standards established in this Section are not exceeded.
(Ord. 978, 11/17/2025)
No use, activity, or process shall produce vibrations that are perceptible without instruments by a reasonable person at the property lines of a site.
(Ord. 978, 11/17/2025)
No use, activity, or process shall produce objectionable odors that are perceptible without instruments by a reasonable person at the property lines of a site.
(Ord. 978, 11/17/2025)
The use, handling, storage, and transportation of hazardous and extremely hazardous materials shall comply with the provisions of the California Hazardous Materials Regulations and any other applicable laws.
(Ord. 978, 11/17/2025)
No use, activity, or process shall produce any unreasonable, disturbing, or unnecessary emissions of heat or humidity, at the property line of the site on which they are situated, that cause significant distress, discomfort, or injury to a reasonable person.
(Ord. 978, 11/17/2025)
No use, activity, or process shall cause electromagnetic interference with normal radio or television reception in residential zoning districts, or with the function of other electronic equipment beyond the property line of the site on which they are situated.
(Ord. 978, 11/17/2025)