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Administrative Draft Environmental Impact Report Gill Medical Center Project Source: Construction noise levels were calculated by ECORP Consulting using the FHWA Roadway Noise Construction Model(FHWA 2006).Refer to Draft EIR Appendix H for Model Data Outputs. Notes: Construction equipment used during construction derived from CaIEEMod 2016.3.2.The nearest residence is located approximately 330 feet from the center of the construction site. Leq=The equivalent energy noise level,is the average acoustic energy content of noise for a stated period of time.Thus,the Leq of a time- varying noise and that of a steady noise are the same if they deliver the same acoustic energy to the ear during exposure.For evaluating community impacts,this rating scale does not vary,regardless of whether the noise occurs during the day or the night. Project Operational Noise The operational noise sources associated with the various land use plans are discussed below. Operational noise sources associated with the Proposed Project include mobile and stationary (i.e., parking lot activity, helicopter takeoff and landing, sirens) sources. Operational Offsite Traffic Noise Future traffic noise levels throughout the Project vicinity (i.e.,vicinity roadway segments that traverse noise-sensitive land uses) for the Proposed Project were modeled based on the traffic volumes identified by KD Anderson &Associates (2020) to determine the noise levels along Project vicinity roadways.Table 4.15-11 shows the calculated offsite roadway noise levels under existing traffic levels compared to future buildout of the Project. The calculated noise levels as a result of the Project 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 appropriate.Where no jurisdiction is noted, the roadway segment lies within unincorporated San Joaquin County. In the case that the existing ambient noise levels already exceed the applicable numeric noise thresholds without the Project, the FICON thresholds of significance, described previously, are applied. Table 4.15-11.Proposed Project Predicted Traffic Noise Levels CNEL at 100 feet from Exceed Standard Centerline of Roadway Noise AND result in Standard Noise Levels Roadway Segment Surrounding Uses Existing+ Exceeding Existing Project Acceptable Conditions Conditions CNELEL) Exterior Noise Standards Eight Mile Road West of Interstate 5 Residential and 64.6 64.6 65 No Agricultural Between Interstate 5 and Residential and 63.3 63.4 65 No Davis Road Agricultural Between Davis Road and Residential and 61.9 62.4 65 No Lower Sacramento Road Agricultural Between West Lane and Residential and 59.3 59.4 65 No Ham Lane Agricultural Between Ham Lane and Residential and 60.7 61.0 65 No Leach Road Agricultural Noise 4.15-22 October 2021