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Committee clarifies noise measurement point for data centers; staff cites busy-road ambient readings
Summary
Planners said noise for data centers will be measured at the facility's property line where it abuts residential zoning; staff provided ambient readings from Tiffin Avenue to explain context for the proposed 55 dB day / 45 dB night limits.
The committee and staff clarified how the draft code measures noise for data centers: officials said noise should be measured at the data center's own property line where it abuts residential zoning. "So the measurement is being taken at the data center's property," staff explained while answering a committee member's question.
Staff offered ambient-noise examples to illustrate how the limits compare to existing conditions: "Tiffin Avenue's ambient noise level at 03:00 in the afternoon is 75 to 85 [decibels]," the Planner said, and cited that a point 100 feet from Tiffin Avenue measured 70 to 80 dB. Staff noted the draft sets a 55 dB daytime limit and 45 dB at night and that the measurement point and required preconstruction acoustic study will inform permit decisions.
