2022-05-25 CC Packet - Laserfiche WebLink

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May 25, 2022 Centerville City Council Page 9 of 18 RE: Banjo Distribution Center, PUD, Preliminary & Final Plat PLANNING COMMISSION REQUESTS FOR FURTHER INFORMATION Embedded within the recommendations from the Planning and Zoning Commission were a number of issues on which they were requesting additional information or research be presented to the City Council, prior to final approval. Below, is information on those issues, based on the reports and figures provided by the applicant. Noise Concerns were raised at the Planning & Zoning Commission hearing about noise from the new facility that might impact nearby residential areas, mainly from the trucks and vans and their associated loading activities. The Commission recommended that a noise study be prepared by the applicants and potential noise mitigation studied. Kimley Horn prepared a technical noise memorandum for the applicant dated 5-17-22 which concluded that noise levels generated on the project site would likely add very little perceived increase in noise to the neighborhood and that mitigation (wall, fence, berm) would have very little effect and is not recommended. Estimated noise contours in the area from the memo are on the next page. I spoke with the memo’s author, Tad Hardy of Kimley-Horn Charlotte NC office, who offered the following: The memo estimates existing ambient noise as 45-50 dB(A). This is an estimate based on experience with similar suburban settings and did not involve actual measurements or noise monitoring on site. This existing ambient noise will be measured as a condition of approval to determine a baseline before construction begins. The memo estimates noise from the various sources at the Banjo project site as 44-48 dB(A). Not directly stated in the memo is the additive effect of the existing noise plus the project noise. Mr. Hardy said that adding the existing 45-50 dB(A) to the new 44-48 dB(A) amounts to an additional 1-3 dB(A) – the cumulative noise that would be experienced once the project is operational would likely be 46-53 dB(A), still below the city and state noise standards. Within the dB(A) noise measurement is the understanding that there will be occasional louder noises for very short periods of time. Background neighborhood noise levels will likely increase over time regardless of development on the Banjo site. Taken together, we conclude the following on the noise issue: 1)Existing noise levels in the neighborhood are modest. 2)New noise from various sources on the Banjo site would also be modest. 3)The combination of existing and new noise levels would be an additional 1-3 dB(A), a small increase.