Thousand Oaks controls data-center noise through its Municipal Code Chapter 21 nuisance ordinance, not a decibel table. Section 5-21.03 bars loud, unnecessary, and unusual noise, judged at the property line by intensity, ambient level, and proximity to homes. Numeric limits come from the General Plan and permit conditions.
Thousand Oaks Municipal Code Chapter 21 (Sec. 5-21.01 to 5-21.05) is a qualitative noise ordinance with no fixed dBA table. Section 5-21.03 makes it unlawful to make 'loud, unnecessary, and unusual noise' that disturbs a neighborhood; the standards weigh the noise level at the property line, the ambient background, proximity to residential sleeping areas, time of day, and duration. Section 5-21.02 also bars powered equipment audible in residential zones from 9 p.m. to 7 a.m. Numeric guidance lives in the General Plan Noise Element, which sets 60 dBA CNEL as the exterior compatibility threshold for homes. A data center's cooling and generators are held to these standards through CEQA and permit conditions.
Noise that disturbs neighbors or exceeds the property-line and time-of-day limits in Chapter 21 is a code violation, enforced by the City through citations, and, for a permitted data center, breach of its permit's noise conditions.
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