AgdaPkt 2015-09-21 Joint Special SAF PAF

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Red Morton Community Park Sports Lighting Initial Study City of Redwood City 54 June 2015 4.12.1.2 Existing Noise Environment The noise environment at the site and in the surrounding area results primarily from vehicular traffic along Madison Avenue, Valota Road, Roosevelt Avenue, King Street, and Myrtle Street, in addition to Jefferson Avenue. The occasional overhead aircraft associated with the San Carlos Airport may also affect the noise environment sporadically. An ambient noise monitoring survey was completed in the project area on Thursday, March 12th through Tuesday, March 17th, 2015. The noise survey included two long-term and two short-term noise measurements, as shown on Figure 4.12-1. Long-term noise measurement LT-1 was located across from 634 Hawes Street, which is a single family residence. The measurement was positioned north of Madison Avenue and Mitchell Field by approximately 110 and 330 feet, respectively. LT-1 was approximately 20 feet from the centerline of Hawes Street and approximately 240 feet from the centerline of Jefferson Avenue. Hourly average noise levels at this location typically ranged from 49 to 65 dBA Leq during the day, and from 43 to 58 dBA Leq at night. The community noise equivalent level ranged from 56 to 60 dBA CNEL, with an average of 57 dBA CNEL. Long-term noise measurement LT-2 was located northeast of Mitchell Field in the front of 715 Myrtle Street. LT-2 was positioned approximately 66 feet east of the nearest baseball field (Kiwanis Field), approximately 20 feet east of the centerline of Myrtle Street, and approximately 130 feet south of the centerline of Madison Avenue. Hourly average noise levels at this location ranged from 47 to 68 dBA Leq during the day and from 36 to 56 dBA Leq at night. The community noise equivalent level ranged from 56 to 60 dBA CNEL for the duration of the testing period, with an average noise level of 58 dBA CNEL. Short-term noise measurements, ST-1 and ST-2, were conducted on Thursday March 12th, 2015 in ten-minute intervals starting at 1:20 PM. The ST-1 measurement was made near the senior center, approximately 150 feet east of the centerline of Valota Road. ST-1 was approximately 35 feet south of the parking lot for the senior center and approximately 95 feet southeast of single-family residences. The ten-minute Leq(10) measured at ST-1 was 49 dBA Leq(10), and the estimated community noise equivalent level was 51 dBA CNEL. The ST-2 measurement was made near the playground located by the tennis courts in the southeastern corner of the park. ST-2 was approximately 80 feet southeast of the tennis courts and approximately 200 feet north of the centerline of Roosevelt Avenue, with shielding from the roadway provided by single-family residences. The ten-minute Leq(10) measured at ST-2 was 56 dBA Leq(10), and the estimated community noise equivalent level was 60 dBA CNEL. 8.A. - Page 71