A. It is unlawful for any person at any location within the city to create any noise, or to allow the creation of any noise, on property owned, leased, occupied or otherwise controlled by such person which causes the exterior noise level, when measured at the property line of any affected noise sensitive land use, to exceed any of the categorical noise level standards as set forth in the following table:
NOISE LEVEL STANDARDS, dBA | |||
Category | Cumulative Number of minutes in any one-hour time period | Evening and Daytime 6 a.m. to 7 p.m. | Nighttime 7 p.m. to 6 a.m. |
1 | 30 | 50 | 45 |
2 | 15 | 55 | 50 |
3 | 5 | 60 | 55 |
4 | 1 | 65 | 60 |
5 | 0 | 70 | 65 |
B. In the event the measured ambient noise level without the alleged offensive source in operation exceeds an applicable noise level standard in any category above, the applicable standard or standards shall be adjusted so as to equal the ambient noise level.
C. Each of the noise level standards specified above shall be reduced by five dB for pure tone noises, noises consisting primarily of speech or music, or for recurring impulsive noises.
D. If the intruding noise source is continuous and cannot reasonably be discontinued or stopped for a time period whereby the ambient noise level without the source can be measured, the noise level measured while the source is in operation shall be compared directly to the noise level standards. (Prior code § 5090.4.1)