COMPLIANCE INFO_FINAL INITIAL STUDY/MITIGATED NEGATIVE DECLARATION 5/25

Home Browse Search

North County Recycling Center and Sanitary Landfill Permit Revision Project Final Initial Study/Mitigated Negative Declaration · San Joaquin County | May 2025 55 for non-engineered timber and masonry buildings is used to represent the building types near the project site and along the haul route. San Joaquin Noise Ordinance Chapter 9-404.040 establishes standards for noise from transportation sources and stationary sources. For transportation sources, the maximum allowable noise exposure in outdoor areas is 65 dBA. The maximum allowable noise exposure from stationary sources in outdoor activity areas of noise sensitive land uses is 75 dBA during the daytime (7 a.m. to 10 p.m.) and 65 dBA during the nighttime (10 p.m. to 7 a.m.). San Joquin County General Plan The Noise Element in the County’s 2035 General Plan states that the County shall require construction projects anticipated to generate a significant amount of vibration to ensure acceptable interior vibration levels at nearby vibration-sensitive uses based on FTA criteria. DISCUSSION OF IMPACTS a) Generation of a substantial temporary or permanent increase in ambient noise levels in the vicinity of the project in excess of standards established in the local general plan or noise ordinance, or applicable standards of other agencies? Less-than-Significant Impact The project does not propose any new construction, thus the primary source of noise during project operation would be generated by the increase of equipment on the project site and project-generated vehicle trips. According to the Transportation Impact Analysis prepared for the project, the project will generate an average of 461 new trips per day, including 359 visitor and worker commute trips and 102 haul truck trips. Traffic noise levels along the haul route would increase with the additional vehicle trips contributed by project operations. The project would generate a total of 9 truck trips and 31 visitor/worker commute trips during the AM peak hours and 8 visitor/worker commute trips during the PM peak hours. The project-generated traffic noise levels were calculated during the AM peak hour to represent the highest traffic noise increase during project operation. Based on the estimates contained within the Noise Analysis prepared for the project , project related traffic noise would increase by up to 2.0 dBA along the haul route, which is below the County’s threshold. Where the project noise levels exceed the County’s noise standard, existing and cumulative noise levels have already exceeded the 65-dBA Ldn threshold. Therefore, impacts related to traffic noise increase along the haul route compared to current conditions would be less than significant. b) Generation of excessive groundborne vibration or groundborne noise levels? Less-than-Significant Impact The off-road equipment currently used at North County Landfill will continue to be used with the implementation of the project. Landfill operation would not involve equipment or activities that would generate excessive groundborne vibration or groundborne noise levels. While the project