COMPLIANCE INFO_FINAL INITIAL STUDY/MITIGATED NEGATIVE DECLARATION 5/25

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North County Recycling Center and Sanitary Landfill Permit Revision Project Final Initial Study/Mitigated Negative Declaration · San Joaquin County | May 2025 54 4.2.13 Noise Would the project result in: Potentially Significant Impact Less-than- Significant Impact with Mitigation Incorporated Less-than- Significant Impact No Impact 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? b) Generation of excessive groundborne vibration or groundborne noise levels? c) For a project located within the vicinity of a private airstrip or an airport land use plan or, where such a plan has not been adopted, within two miles of a public airport or public use airport, would the project expose people residing or working in the project area to excessive noise levels? A Noise and Vibration Technical Study was conducted for the project by Baseline Environmental Consulting. The results of the study were documented in a Noise and Vibration Technical Study prepared in February 2025 (Appendix B). The information in this section is based on and adapted from the findings of the Noise and Vibration Technical Study. ENVIRONMENTAL SETTING The project site is located in a rural area and the primary source of noise in the immediate vicinity is vehicle traffic on East Harney Lane. Surrounding land uses are primarily agricultural; however, there are scattered single-family residences within 2,000 feet of the project site. However, while no construction activities are proposed, to accommodate an increase in waste acceptance and additional equipment on the project site, there will be an increase in vehicular traffic along the main project haul routes will generate noise and vibration compared to existing conditions. REGULATORY SETTING Federal Transit Administration The Federal Transit Administration (FTA) has developed vibration thresholds to prevent disturbances to building occupants based on the frequency of a vibration event. The FTA thresholds of 80 vibration decibels (VdB) and 83 VdB for infrequent events were used in the Noise Study to evaluate disturbance to residences and buildings where people normally sleep and to institutional land uses with primarily daytime use (such as schools and library). Furthermore, the FTA has developed vibration thresholds based on PPV values to evaluate the potential impact of construction vibration on structures. The FTA threshold of 0.2 in/sec peak particle velocity (PPV)