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Administrative Draft Environmental Impact Report Gill Medical Center Project 4.15.5 Cumulative Impacts 4.15.5.1 Cumulative Construction Noise Construction activities associated with the Proposed Project and other construction projects in the area may overlap, resulting in construction noise in the area. However, construction noise impacts primarily affect the areas immediately adjacent to the construction site. Construction noise for the Proposed Project was determined to be less than significant following compliance with NIOSH noise standards. Cumulative development in the vicinity of the Project site could result in elevated construction noise levels at sensitive receptors in the Project area. However, each project would be required to comply with the applicable noise limitations on construction. Therefore, the Project would not contribute to cumulative impacts during construction. 4.15.5.2 Cumulative Traffic Noise Cumulative traffic noise levels throughout the Project vicinity (i.e., vicinity roadway segments that traverse noise-sensitive land uses)were modeled based on the traffic volumes identified by KD Anderson & Associates (2020) to determine the noise levels along Project vicinity roadways.Table 4.15-16 shows the calculated offsite roadway noise levels under cumulative conditions without the Project (Cumulative No Project) compared to cumulative conditions plus future buildout of the Project (Cumulative Plus Project). The calculated noise levels as a result of Cumulative Plus Project conditions at affected sensitive land uses are compared to the noise standards promulgated in the San Joaquin County General Plan and Municipal Code as well as the City of Stockton Municipal Code.Where no jurisdiction is noted, the roadway segment lies within unincorporated San Joaquin County. In the case that Cumulative No Project conditions exceed the applicable numeric noise thresholds, the FICON thresholds of significance are applied. FICON's measure of substantial increase for transportation noise exposure is as follows: If the existing ambient noise levels at existing and future noise-sensitive land uses (e.g. residential, etc.) are less than 60 dBA CNEL and the Project creates a readily perceptible 5 dBA CNEL or greater noise level increase and the resulting noise level would exceed acceptable exterior noise standards; or If the existing noise levels range from 60 to 65 dBA CNEL and the Project creates a barely perceptible 3 dBA CNEL or greater noise level increase and the resulting noise level would exceed acceptable exterior noise standards; or If the existing noise levels already exceed 65 dBA CNEL, and the Project creates a community noise level increase of greater than 1.5 dBA CNEL As shown in Table 4.15-16, no roadway segment would exceed the applicable County or City noise standard or generate an increase of noise beyond the FICON significance standards in any scenario. Therefore, the Project would have a less than cumulatively considerable mobile-source impact. Noise 4.15-35 October 2021