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HomeMy WebLinkAboutS2018-0026 - MiscDL Acoustics Keith Walker 15 Tiburon Bay Corona Del Mar, CA, 92625 52018-002s 151'tbvro0 83ay 14301 Middletown Lane Westminster, CA 92683 Voice/Fax 714.373.3050 dlubman@dlacoustics.com April 24, 2019 Report emailed to: kawalker34@yahoo.com Pool and or Spa Noise report for residence at 15 Tiburon Bay, Corona Del Mar, CA Dear Homeowner: At about 10:00 a.m. Wednesday, April 24, 20191 measured the pool and or spa equipment noise at your nearest neighbor's residence to test for compliance with the Newport Beach noise regulation (10.26.025). Newport Beach Residential Noise Standard For Noise Zone 1 (residential) the N. B. regulation's daytime noise level standard (maximum noise level from 10 p.m. to 7 a.m.) is 55 dBA— corrected for ambient noise. The nighttime noise standard (max noise level from 7 a.m. to 10 p.m.) is 50 dBA. The measurement is corrected for ambient noise and rounded to the nearest decibel as shown below. Measured pool and or spa apparatus noise meet the Newport Beach noise standard fordaytime use only. A timer must be installed on the pool apparatus to restrict use to from 7 a.m. to 10 p.m. Locations and values of daytime noise measurements Uncorrected pool and or spa noise + ambient noise measured at property line: 55.53 dBA Ambient noise level measured at this location: 47.80 dBA Pool and or spa equipment noise corrected for ambient noise: 54.73 dBA Pool and or spa equipment noise rounded to the nearest decibel: 55 dBA 55 dBA (Pass for daytime use only) The currently installed pool and or spa apparatus noise of 55 dBA meets the Newport Beach noise code for daytime" use only (7 a.m. to 10 p.m.) since the noise corrected for ambient exceeds 50 dBA. If you have any questions about this report, please do not hesitate to contact me at (714) 373- 3050 or by email at dlubman(a�dlacoustics.com Sincerely yours, .CJQN'ld L.iT'1AWYI. David Lubman, FASA, FINCE Acoustical Consultant Orange County Certification #200524 April 24, 2019 APPENDIX A: Measurement Instrumentation Equipment The acoustical equipment used in the performance of this test is in accordance with ASTM and ANSI (American National Standards Institute) requirements. Key elements are as follows: Critical sound measuring instruments (sound analyzer, calibrator, and microphone) are annual calibrated by an independent NAVLAP certified laboratory. The most recent calibration was on 08/01/18. All calibration documents are available for inspection upon request. Critical instruments employed were: Bruel & Kjaer— Type 2270 Type I Precision Sound Analyzer SN # 3002720 Bruel & Kjaer - Type 4189 microphone, SN # 2850866 Bruel & Kjaer—Type 4231 Field Sound Calibrator, SN # 2588671 DL Acoustics 14301 Middletown Lane Westminster, CA 92683 Res wchACa7sr%!e6) fr7AIca(661ts Voice/Fax 714.373.3050 dlubman@dlacoustics.com April 24, 2019 Receipt for $350 Payment in Full One Pool and or Spa Sound Test for homeowner at 15 Tiburon Bay, Corona Del Mar on 4/24/19 Check 2531 received from Keith A. Walker dated 4/24/19 David Lubman DL Acoustics EIN 33-0246903 Thanks for your business!