04 ADDITIONAL DEVELOPMENT STANDARDS
Table 1 – Maximum Allowed Noise Levels, dB (Ldn) | ||||
|---|---|---|---|---|
Land Use | Interior | Normally Acceptable1 | Conditionally Acceptable2 | Normally Unacceptable3 |
Residential | ||||
Low Density | 45 | <60 | 55 – 70 | 70 – 75 |
Medium/High Density | <65 | 60 – 70 | 70 – 75 | |
Commercial | ||||
Motel | 50 | <65 | 60 – 70 | 70 – 80 |
Office | 55 | <70 | 67 – 77 | >75 |
Restaurant/Retail | 60 | <70 | 67 – 77 | >75 |
Industrial | 55 | <75 | 70 – 80 | >75 |
Public/Quasi-Public | ||||
School, Library | 45 | <70 | 60 – 70 | 70 – 80 |
Church, Theater | 45 | <70 | ||
Open Space | ||||
Playgrounds/Parks | NA | <70 | NA | >65 – 75 |
Golf Courses | <75 | 70 – 80 | ||
Cemeteries | ||||
Notes: | |
|---|---|
1. | Normally acceptable noise levels are those which pose no threat to the specified use. Standard construction would reduce external noise so that the interior noise level would not disrupt activities. |
2. | Conditionally acceptable noise levels are those in which standard building construction would not be adequate to protect the use. However, standard mitigation measures such as noise barriers, site design, architectural design to protect noise-sensitive activities, or acoustical insulation could be easily employed to achieve acceptable sound levels. Based on the noise levels along Highway 156 projected by Caltrans, some of the properties with highway frontage would fall into this category. The City will require mitigation for new projects proposed in these areas to ensure that noise levels are reduced to acceptable standards. |
3. | Normally unacceptable noise levels are those for which simple mitigation measures would not be adequate. The specified land uses would not be appropriate in these areas unless major noise attenuation measures have been designed into the projects by a professional who is competent in sound reduction and unless a detailed noise study has been conducted to assure the performance of the design. Construction of the specified use should be strongly discouraged in areas with these levels. |