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Administrative Draft Environmental Impact Report Gill Medical Center Project Non-exempt Onsite Stationary Noise The main non-exempt stationary noise associated with the Proposed Project would be parking lot activity such as internal vehicle circulation, car doors opening and closing, people taking, and stereo music. Onsite Project operations have been calculated using the SouncIPLAN 3D noise model.The results of this model can be found in Draft EIR Appendix H. Previous noise measurements taken by ECORP Consulting, Inc., using a Larson Davis SounclExpert LxT precision sound level meter, within a visitors parking lot adjacent to a 298 bed medical center, emergency care, and Level II trauma center equip with FlightCare air ambulance service recorded a noise level of 53.8 dBA when no emergency activity was occurring. This sound power level was used as a reference measurement in the Sound PLAN noise model to predict the propagation of onsite noise produced by the Project.The solid seven-foot-tall CMU wall proposed to be constructed along the southern site boundary adjacent the existing residential property lines is accounted for in the noise prediction modeling. Table 4.15-12 shows the predicted Project noise levels at nearby sensitive receptors in the Project area and Figure 4.15-2. Project Onsite Non-Exempt Source Noise Generation depicts the predicted noise levels from Project operations at the site locations listed in Table 4.15-12. Table 4.15-12.Modeled Operational Noise Levels-Non-Exempt Noise Existing Modeled County Exceed Operational Exterior Op Site Baseline Noise Standard? Location Location Measurements Noise Standards (Day (Leq dBA) Attributable to (dBA) /Night) Project(Uq dBA) (Day/Night) 1 Northeast of Project site on Ham Lane N/A 31.4 50/45 No/No 2 Residential property northeast of Project site N/A 34.1 50/45 No I No 3 Residential property northeast of Project site N/A 35.5 50/45 No/No 4 Residential property east of Project site N/A 40.0 50/45 No/No 5 In front of residence on Ham Lane north of N/A 34.3 50/45 No/No Project site 6 Residential property south of Project site N/A 36.9 50/45 No/No 7 Residential property south of Project site N/A 40.9 50/45 No/No 8 Residential property south of Project site N/A 42.0 50/45 No/No 9 Adjacent to Eight Mile Road and proposed 75.2 36.3 50/45 No/No driveway 10 Residential property south of Project site N/A 40.8 50/45 No/No 11 Residential property south of Project site N/A 41.4 50/45 No I No Noise 4.15-26 October 2021