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874 Lewelling Blvd. <br />Noise Study <br />9 July 2018 <br />Page 3 of 8 <br /> <br /> <br /> <br />Figure 1 – Noise Survey Measurement Positions <br /> <br />Existing Noise Exposure <br />To capture 24-hour noise exposure, a Larson Davis model 820 sound level meter was secured <br />to a tree on the median of Lewelling Blvd. west of the project site (see Figure 1). The meter <br />monitored for several days between Monday, June 18th and Friday, June 22nd, 2018 and <br />recorded the average (Leq), maximum, minimum, and statistical noise metrics in 15-minute <br />intervals. Complete measured data is shown graphically in Appendix B. <br />Measured data was subsequently used to calculate the Community Noise Equivalent Level <br />(CNEL) at the unattended position for each full day as shown in Table 1 below. <br />TABLE 1 – Measured CNEL at LT-1 <br />Date CNEL (dBA) <br />Tuesday, June 19, 2018 77.9 <br />Wednesday, June 20, 2018 78.2 <br />Thursday, June 21, 2018 78.2 <br />AVERAGE 78.1 <br />Noise exposure at the future building facades would be lower than what was measured at the <br />unattended position due to additional distance from the road and this adjustment was <br />estimated using a short-term measurement at the project setback (ST-1) taken simultaneously <br />with the unattended meter. Two additional simultaneous measurements (ST-2 and ST-3) were <br />taken to document noise levels further away from the street. However, these positions were <br />acoustically shielded by the existing wood fence (approximately 6 feet high) and not <br />60