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Glendora California Environmental Impact Report (EIR)
RBF CONSULTING
14725 Alton Parkway
Irvine, California 92618-2069
Contact: Mr. Glenn Lajoie, AICP
949.472.3505
October 2003
Table 5.3-1
Sound Levels and Human Response
Glendora Zoning
Law of
Nuisance
Law on Noise
|
Noise Source |
dBA Noise Level |
Response |
|
|
|
|
|
Carrier Jet Operation |
140 |
Harmfully Loud |
|
*Whistles **Sporting Event |
130 127 |
Pain Threshold
|
|
Jet Take
off (200 feet) |
120 |
|
|
Unmuffled
Motorcycle |
110 |
Maximum Speaking Vocal Effort Physical Discomfort Listen to what the residents hear, requires speakers |
|
Loud Power
Mower |
100 |
Very Annoying Hearing Damage (Steady 8 -Hour Exposure) |
|
Heavy
Truck (50 feet) |
90 |
Moderately Annoying |
|
Alarm
Clock |
80 |
Annoying |
|
Freeway Traffic (50 feet.) |
70 |
Telephone Use Difficult |
|
Dishwashers |
60 |
Intrusive |
|
Light Auto Traffic (100 feet) |
50 |
Quite - See Glendora Zoning code |
|
Living
Room |
40 |
|
|
Library
|
30 |
Very Quite |
|
Broadcasting Studio |
20 |
|
|
|
10 |
Just Audible |
|
|
0 |
Threshold of Hearing |
|
Source: Melville C. Branch and R. Dale
Beland , Outdoor Noise in the Metropolitan Environment, 1970, page 2 .
|
||
|
Code of Federal Regulations TITLE 24--HOUSING AND URBAN DEVELOPMENT GUIDELINES |
||
| Normally Acceptable | Conditionally Acceptable | Unacceptable |
| Not Exceeding 65 dB | 65 - Not Exceeding 75 dB | Above 75 dB |
|
Source: PART 51--ENVIRONMENTAL CRITERIA AND
STANDARDS - Subpart B--Noise
Abatement and Control
Federal Regulations Sec. 51.101 General policy - Section (8) Exterior noise goals. It is a HUD goal that exterior noise levels do not exceed a day-night average sound level of 55 decibels. This level is recommended by the Environmental Protection Agency as a goal for outdoors in residential areas. |
||
|
California Land Use Compatibility Noise
Guidelines LAND USE CATEGORY -- Residential - Low Density, Single-Family, Duplex , Mobile Homes |
|||
| Normally Acceptable | Conditionally Acceptable | Normally Unacceptable | Clearly Unacceptable |
| 50-60 dBA | 55-70 dBA | 70-75 dBA | 75-85 dBA |
| Source: California Land Use Compatibility Noise Guidelines - Community Noise Equivalent Level (CNEL) | |||
|
Los Angeles County Exterior
Noise Standards LAND USE CATEGORY -- Exterior Noise Standards -- Zoned Residential Unincorporated County |
|||
| 7:00 am 10:pm | 50 dBA | ||
| 10:pm 7:00 am | 45 dBA | ||
| Source: Title 12 ENVIRONMENTAL PROTECTION Chapter 12.08.390 | |||
Glendora Single-Family Residential - Noise Regulations |
|||
| 7:00 am 7:00 pm | 55 dBA | ||
| 7:00 pm 10:00 pm | 50 dBA | ||
| 10:00 pm 7:00 am | 45 dBA | ||
| Source: City of Glendora Municipal Code, Chapter 9.44, Noise Regulation. | |||
| Table 5.3-9 Maximum Noise Levels Generated by Parking Lots | |
| Noise Source- Parking lot or Street | Maximum Noise Levels @ 50 feet from Source |
| Car door slamming | 63 dBA |
| Car starting | 60 dBA |
| Car accelerating | 55 dBA |
| People shouting, laughing | 65 dBA |
| Car idling | 61 dBA |
| *Whistles | 130 dBA 260 percent of authorized level by Glendora code |
| **Sports Crowd | 127 dBA 254 percent of authorized level by Glendora code |
| Source: Wieland Associates, 2002. - Handbook of Noise Control, Cyril M. Harris, 1979. | |
| **LEAGUE FOR THE HARD OF HEARING Founded 1910 | |
Glendora California Environmental Impact Report (EIR) by: RBF CONSULTING: Parking lot noise levels at the property line could exceed the Citys 55 dBA noise (day-time) standard. This impact is considered potentially significant unless mitigated. Mitigation has been recommended requiring that subsequent noise analyses be prepared for future uses, as determined necessary by the City of Glendora, which demonstrate that all feasible sound attenuation has been incorporated into the site plans (i.e., landscaping and brushed driving surfaces), so that noise is minimized to the greatest extent practicable. |
An overview on the Law of Nuisance - Glendora Code on Noise - City of Glendora Law of Nuisance Code Glendora Code on Zoning - Glendora Environmental Impact Report
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| * Whistle Generates 130 dBA Sound Level
* Nova Scotia Hearing and Speech Clinic |
