Chapter 6.60 NOISE


Section 6.60.040 Exterior noise level standards.

    A.    It is unlawful for any person at any location within the unincorporated area of the county 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 any single- or multiple-family residential, school, hospital, church, public library or commercial properties situated in either the incorporated or unincorporated area to exceed the noise level standards as set forth in Table 6.60.040A or Table 6.60.040B following:



Table 6.60.040A
Receiving Land Use —  Single- or Multiple-Family Residential,
School, Hospital, Church or Public Library Properties
Noise Level Standards, dB(A)


Category
Cumulative Number of Minutes in any one hour time period
Daytime
7 a.m. to 10 p.m.
Nighttime
10 p.m. to 7 a.m.
1
30
50
45
2
15
55
50
3
5
60
55
4
1
65
60
5
0
70
65

Table 6.60.040B
Receiving Land Use —  Commercial Properties
Noise Level Standards, dB(A)


Category
Cumulative Number of Minutes in any one hour time period
Daytime
7 a.m. to 10 p.m.
Nighttime
10 p.m. to 7 a.m.
1
30
65
60
2
15
70
65
3
5
75
70
4
1
80
75
5
0
85
80


    B.    In the event the measured ambient noise level exceeds the applicable noise level standard in any category above, the applicable standard shall be adjusted so as to equal said ambient noise level.
    C.    Each of the noise level standards specified in Tables 6.60.040A and B shall be reduced by five dB(A) for simple 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 can be measured, the noise level measured while the source is in operation shall be compared directly to the applicable noise level standards in Table 6.60.040A and Table 6.60.040B.
    E.    Notwithstanding the noise level standards set forth in this section, the noise level standard applicable to the emission of sound from transformers, regulators, or associated equipment in electrical substations shall be 60 dB(A). (Prior gen. code §§ 3-107.401— 3-107.405)