ARCHIVED REPORTS_1993_1 - Laserfiche WebLink

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Measurement Location 2 -370 Feet Northeast of the Transfer Building: Noise levels at this location were similar to Measurement Location 1. The average level during the measurements was 57 dBA. Measurement Location 3 - 190 Feet East of Transfer Building. The east facade o the transfer building is a solid wall with louvers, and no doors. Noise levels at this location are substantially lower because of the noise reduction provided by the building. During a 10-minute period of heavy activity inside, the measured noise level was an average of 50 dBA. Measurement Location 4 -250 Feet South of "Landfill" Side of Transfer Building: This monitoring site also faced open doors at the other side of the building. The average noise levels measured in two consecutive 5-minute intervals were 51 dBA (very little activity inside) and 59 dBA (front loader and other activities). Noise radiation from the two sides of the building with the open doors is therefore about equal. The hours of operation of the Lovelace Transfer Station are from 6:00 a.m. to 5:00 p.m. In order to make a worst case assessment of potential noise impacts, it is assumed that noise levels radiated from the proposed facility would be similar to the North County Facility during periods of heavy operation, and this could potentially occur over the entire time period that the facility is open. The Ldn can then be calculated at the sensitive receptor locations for comparison to existing noise levels and County guidelines. The nearest resident would be the mobile home located northwest of the existing facility and due north of the proposed facility (Noise Monitoring Location 2). The future Ldn at this residence would-be about 59 dBA, a 2 to 4 dBA increase over existing Ldn noise levels. This would not be substantial increase and noise levels would continue to remain below those considered normally acceptable by the San Joaquin County Noise Element of the General Plan (65L ). The design for the proposed facility incorporates a solid wall facing north and transfer tunnel, rather than then rolling doors facing directly out of the building at the North County Facility. This design feature results in lower noise levels at the nearest residence. Other onsite noise sources in the future would included the circulation of trucks and cars around the perimeter of the facility. The noise generated by these intermittent vehicles is typically about 75 dBA at the nearest residence to the north. The contribution of the onsite vehicle circulation to the total 24-hour day/night average noise level (Ldn) generated by the facility is insignificant. Noise levels for onsite activities at other sensitive receptors identified in the Setting Section would be less than existing noise levels generated by the existing facility. The redesign would move activities further away from the resident located across Lovelace Road from the existing transfer facility (Noise Monitoring Location 3). Because of the building design and orientation, noise radiation from the transfer building to the Cohelo road residents to the north would be less than noise generated from the existing facility. The total Ldn noise levels would not change in the future as a result of the proposed project at any other residences. The other potential operational noise impact could result from increased traffic on Lovelace Road. Based on a comparison of traffic volumes with and without the proposed project, it is calculated that noise levels will differ by.less than 1 dBA as a result of project-generated traffic. This is a insignificant change in the traffic noise levels along Lovelace Road. The noise impact to residents living along Lovelace Road would not be significant. 11-4