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Draft code adds decibel and vibration testing, commissioners seek measurable thermal standards
Summary
Proposed Section 749 would require baseline noise analyses, decibel limits at property lines, vibration studies within 2,000 feet of sensitive uses, and a six‑month post‑operation retest; commissioners asked staff to replace vague language like "perceptible resonance" and "thermal discomfort" with measurable standards.
The draft data‑center standards propose concrete noise and vibration requirements to improve enforceability.
Mrs. Stephanie Dunlap described Section 749.07, which would require a noise analysis establishing baseline levels and proposed mitigations and would set permitted daytime and nighttime decibel limits measured at property lines; the draft also requires a vibration study within 2,000 feet of sensitive uses and a six‑month post‑operation retest. Commissioners pressed staff on vague phrases: Mr. Sky Schelle asked whether the standards being cited were intended to measure "perceptible resonance," calling the phrase vague and urging its removal if an industry standard could not be identified.
Staff said third‑party consultants and the submitted analysis would certify compliance and that enforcement would occur through zoning complaint processes and possible notices of violation. Commissioners asked staff to explore adding measurable thermal metrics rather than wording like "condition of thermal discomfort."
