Brentwood City Hall


Our home pageContact UsPrevious Page

Central Park Gazebo

CITY COUNCIL AGENDA ITEM NO. 16

Meeting Date: January 22, 2002

Subject/Title: Public Hearing to repeal Chapter 9.32 (Unnecessary Noise) and adopted a new Chapter 9.32 (Noise Regulations).

Submitted by: Community Development Department (Oshinsky/Zilm)

Approved by: John Stevenson, City Manager


RECOMMENDATION

The Planning Commission and staff recommends that the Council introduce and waive the first reading of Ordinance No. ____ repealing Chapter 9.32 (Unnecessary Noise) and adopting a new Chapter 9.32 (Noise Regulations).

PREVIOUS ACTION

Item was continued to the January 22, 2002 meeting.

BACKGROUND

At the January 8th City Council meeting Council Member Petrovich had a question concerning the definition of an “A” weighting network and had asked that staff return to the 22nd Council meeting with a definition. The following is that definition:

An “A” weighted decibel (dB(A)) is a standard single-number rating representing the overall sound energy of a given source. The “A” weighting network in a sound level meter filters sound in a manner similar to the human ear by downgrading low frequencies.

This same terminology is being used in all (18) of the Noise Ordinances that staff reviewed from other cities as well as the State of California’s Model Community Noise Control Ordinance that has been in existence for 35 years. Brentwood’s Noise Ordinance has been reviewed by acoustical expert, James T. Nelson of Wilson, Ihrig & Associates, Inc. and the City Attorney, and is found to be in compliance with California’s Model Noise Ordinance. 

Following the January 8th meeting, Council Member Gomes asked to see a list showing the relationship of different sound levels. The following is a list showing that relationship:

Sound Level (dBA) Subjective Evaluations Outdoor Indoor Comments
140 Deafening Near jet aircraft and artillery fire 
130 Threshold of pain 
120 Threshold of feeling Elevated train Hard rock band 
110 Jet flyover @ 1000 ft. Inside propeller plane 
100 Very loud Power mower, motorcycle @ 25 ft. and horn @ 10 ft. 
90 Propeller plane flyover @ 1000 ft., noisy urban street Full symphony or band, food blender, noisy factor Continuous exposure above 90 dBA is likely to degrade the hearing of most people
80 Moderately loud Diesel truck @ 40 mph @ 50 ft. Inside auto @ high speed, garbage disposal, dishwasher 
70 Loud Vacuum cleaner, electric typewriter 
60 Moderate Air conditioning condenser @ 15 ft., near freeway auto traffic General office 
50 Quiet Large transformer @ 100 ft. 
40 Birdcalls Private office, soft radio music in an apartment Range of speech is between 40 and 70 dBA
30 Very quiet Quiet residential neighborhood Bedroom, average residence without stereo 
20 Rustling leaves Quiet theater, whisper 
10 Just audible 
0 Threshold of hearing 

FISCAL IMPACT

None.

In conclusion, it is recommended that the City Council:

· Approve the Negative Declaration and direct staff to file a Notice of Determination with the County Clerk; and
· Approve this Municipal Code Amendment.

The same exhibits that were attached to the staff report for the 8th Council meeting are once again included for your review. 

Exhibits

1. Staff report from January 8, 2002 City Council meeting
2. Initial Study and Negative Declaration
3. Ordinance No. ____ and the amended Noise Ordinance Chapter 9.32
4. Existing Noise Ordinance Chapter 9.32 


EXHIBIT 1
CITY COUNCIL AGENDA ITEM NO. _____

Meeting Date: January 8, 2002

Subject/Title: Public Hearing to repeal Chapter 9.32 (Unnecessary Noise) and adopted a new Chapter 9.32 (Noise Regulations).

Submitted by: Community Development Department (Oshinsky/Zilm)

Approved by: John Stevenson, City Manager

____________________________________________________________________

RECOMMENDATION

The Planning Commission and staff recommends that the Council introduce and waive the first reading of Ordinance No. ____ repealing Chapter 9.32 (Unnecessary Noise) and adopting a new Chapter 9.32 (Noise Regulations).

PREVIOUS ACTION

None

BACKGROUND

The existing City of Brentwood Municipal Code Chapter 9.32 establishes guidelines for the protection of the health, safety, welfare, peace and comfort of the inhabitants of the City of Brentwood, so that such activities may be conducted in harmony with other uses of land within the City.

The City Council, in recognition that our existing noise guidelines in the General Plan may unduly restrict commercial and industrial development, has directed that Municipal Code Chapter 9.32 be amended to further define and amend our noise standards.

The result of the amendment of Chapter 9.32 will be to expand the Chapter and provide noise safeguards necessary for protection of the environment, health, safety and welfare in the City of Brentwood.

AMENDMENT

The proposed zoning ordinance amendment is contained in Exhibit A to the attached City Council Resolution. The Exhibit contains both the existing text and the new text.

In preparing the new text, staff reviewed noise ordinances from eighteen cities (Agoura Hills, Costa Mesa, Cypress, El Centro, Fremont, Fresno, Gilroy, Hemet, Irvine, Los Gatos, Mission Viejo, Oceanside, San Buenaventura, San Fernando, Santa Ana, Villa Park, West Covina, and Yorba Linda). 

The goal of the amendment was to respond to the Council direction mentioned above, and to update our standards in line with other cities and counties, provide standards for noise limits and enforcement procedures, if necessary. At the same time, we do not want to be so restrictive as to inhibit activities, which may be conducted in harmony with other uses of land within the City. With that in mind, the major areas of new text are for:

· Designated Noise Zones
· Exterior noise levels
· Interior noise levels
· Prohibited special noise sources
· Exemptions

POLICY CONSISTENCY

The General Plan Environmental Impact Report states that land use compatibility with noise is an important consideration in the planning and design process. Some land uses are more susceptible to noise intrusion than others, depending on the nature of activities expected with the land use. For instance, interference with sleep may occur at 45dBA, so residential land use standards must reflect this noise level.

Some land uses are more tolerant of noise than others. These uses typically include activities that generate loud noise levels or those that do not require verbal interaction, concentration or sleep. Commercial and industrial facilities require very little speech communication and therefore are generally allowed in noisier environments. 

This amendment, which would help to expound the noise chapter and make it more realistically in tune with ambient noise conditions related to traffic and will help us with enforcement and is consistent with City policies.

On December 18, 2001, the Planning Commission held a public hearing and voted to recommend City Council approval of this action.

ENVIRONMENTAL REVIEW

As discussed above, because the amendment expounds upon the noise aspects of the existing ordinance, and because these provisions are necessary for protection of the health, safety and welfare of the residents of the City, an Initial Study and Negative Declaration (attached) have been prepared pursuant to CEQA, which conclude that the amendment could not have a significant effect on the environment. 

FISCAL IMPACT

None.

In conclusion, it is recommended that the City Council:

· Approve the Negative Declaration and direct staff to file a Notice of Determination with the County Clerk; and
· Approve this Municipal Code Amendment.

Exhibits: 

1. Ordinance No. ___ and the Amended Noise Ordinance Chapter 9.32
2. Existing Noise Ordinance Chapter 9.32
3. Initial Study and Negative Declaration

EXHIBIT 2

INITIAL STUDY/NEGATIVE DECLARATION


I. BACKGROUND

1. Project Title: Municipal Code Chapter 9.32 (Unnecessary Noise) Amendment


2. Lead Agency Name and Address: Community Development Department
104 Oak Street
Brentwood, CA 94513

3. Contact Person and Phone Number: Jeff Zilm
925.516.5405

4. Project Location: Citywide


5. Project Sponsor’s Name and Address: City of Brentwood 
150 City Park Way
Brentwood, CA 94513
925-516-5405

6. General Plan Designation: Citywide

7. Zoning: Citywide

8. Project Description Summary:

Existing City of Brentwood Municipal Code Chapter 9.32 was passed and adopted in the exercise of the City police power for the protection of the welfare, peace and comfort of the inhabitants of the City of Brentwood. This amendment to Chapter 9.32 would help to strengthen the chapter to provide proactive noise safeguards to protect the environment, health, safety, and welfare of the City of Brentwood.

This project constitutes appositive environmental impact and mitigation is not required. 

II. SOURCES

The following documents are referenced information sources utilized by this analysis:

1. City of Brentwood Municipal Code.
2. City of Brentwood General Plan, approved June 8, 1993 

III. ENVIRONMENTAL FACTORS POTENTIALLY AFFECTED

The environmental factors checked below would be potentially affected by this project, involving at least one impact that is a Potentially Significant Impact as indicated by the checklist on the following pages.

o Aesthetics o Agriculture o Air Quality
o Biological Resources o Cultural Resources o Geology/Soils
o Hazards & Hazardous Materials o Hydrology/Water Quality o Land Use & Planning
o Energy & Mineral Resources o Noise o Population & Housing
o Public Services o Recreation o Transportation/Circulation
o Utilities/Service Systems o Mandatory Findings of Significance

IV. DETERMINATION

On the basis of this initial study:

n I find that the Proposed Project COULD NOT have a significant effect on the environment, and a NEGATIVE DECLARATION will be prepared.

o I find that although the Proposed Project could have a significant effect on the environment, there will not be a significant effect in this case because revisions in the project have been made by or agreed to by the applicant. A MITIGATED NEGATIVE DECLARATION will be prepared.

o I find that the Proposed Project MAY have a significant effect on the environment, and an ENVIRONMENTAL IMPACT REPORT is required.

o I find that the proposed project MAY have a Apotentially significant impact@ or Apotentially significant unless mitigated" on the environment, but at least one effect 1) has been adequately analyzed in an earlier document pursuant to applicable legal standards, and 2) has been addressed by mitigation measures based on the earlier analysis as described on attached sheets. An ENVIRONMENTAL IMPACT REPORT is required, but it must analyze only the effects that remain to be addressed.

o I find that although the proposed project could have a significant effect on the environment, because all potentially significant effects (a) have been analyzed adequately in an earlier EIR pursuant to applicable standards, and (b) have been avoided or mitigated pursuant to that earlier EIR, including revisions or mitigation measures that are imposed upon the proposed project, nothing further is required.

Signature Date


Printed Name For

V. PROJECT DESCRIPTION

Amend the existing Municipal Code Chapter 9.32 (Unnecessary Noise) so that activities may be conducted in harmony with other uses of land within the City of Brentwood, thus protecting the Public’s health, safety and welfare.

VI. ENVIRONMENTAL CHECKLIST

Introduction

The following Checklist contains the environmental checklist form presented in Appendix G of the CEQA Guidelines. The checklist form is used to describe the impacts of the proposed project. A discussion follows each environmental issue identified in the checklist. Included in each discussion are project-specific mitigation measures recommended as appropriate as part of the Proposed Project.

For this checklist, the following designations are used:

Potentially Significant Impact: An impact that could be significant, and for which no mitigation has been identified. If any potentially significant impacts are identified, an EIR must be prepared.

Potentially Significant With Mitigation Incorporated: An impact that requires mitigation to reduce the impact to a less-than significant level.

Less-Than-Significant Impact: Any impact that would not be considered significant under CEQA relative to existing standards.

No Impact: The project would not have any impact.

Issues Potentially Significant Impact Potentially Significant With Mitigation Incorporated Less-Than-Significant Impact No Impact
I. AESTHETICS.Would the project: 
a. Have a substantial adverse effect on a scenic vista? 
b. Substantially damage scenic resources, including, but not limited to, trees, rock outcroppings, and historic buildings within a State scenic highway? 
c. Substantially degrade the existing visual character or quality of the site and its surroundings? 
d. Create a new source of substantial light or glare which would adversely affect day or nighttime views in the area? 

Discussion

The proposed noise ordinance amendment is consistent with the City of Brentwood General Plan and is not in conflict with any policy concerning scenic vistas, scenic resources or scenic highways. Therefore, no impact would occur. 

Issues Potentially Significant Impact Potentially Significant With Mitigation Incorporated Less-Than-Significant Impact No Impact
II. AGRICULTURE RESOURCES.In determining whether impacts to agricultural resources are significant environmental effects, lead agencies may refer to the California Agricultural Land Evaluation and Site Assessment Model (1977) prepared by the California Dept. of Conservation as an optional model to use in assessing impacts on agriculture and farmland. Would the project: 
a. Convert Prime Farmland, Unique Farmland, or Farmland of Statewide Importance (Farmland), as shown on the maps prepared pursuant to the Farmland Mapping Program of the California Resources Agency, to non-agricultural use? 
b. Conflict with existing zoning for agricultural use, or a Williamson Act contract? 
c. Involve other changes in the existing environment which, due to their location or nature, could individually or cumulatively result in loss of Farmland to non-agricultural use? 

Discussion

The proposed noise ordinance amendment is consistent with the City of Brentwood General Plan and is not in conflict with a policy to preserve Prime Farmland. Therefore, no impact would occur. 

Issues Potentially Significant Impact Potentially Significant With Mitigation Incorporated Less-Than-Significant Impact No Impact
III. AIR QUALITY.Where available, the significance criteria established by the applicable air quality management or air pollution control district may be relied upon to make the following determinations. Would the project: 
a. Conflict with or obstruct implementation of the applicable air quality plan? 
b. Violate any air quality standard or contribute substantially to an existing or projected air quality violation? 
c. Result in a cumulatively considerable net increase of any criteria pollutant for which the project region is non-attainment under an applicable federal or state ambient air quality standard (including releasing emissions which exceed quantitative thresholds for ozone precursors)? 
d. Expose sensitive receptors to substantial pollutant concentrations? 
e. Create objectionable odors affecting a substantial number of people? 
Discussion

The proposed noise ordinance amendment is consistent with the City of Brentwood General Plan and is not in conflict with a policy to preserve the air quality. Therefore, no impact would occur. 

Issues Potentially Significant Impact Potentially Significant With Mitigation Incorporated Less-Than-Significant Impact No Impact
IV. BIOLOGICAL RESOURCES.Would the project: 
a. Have a substantial adverse effect, either directly or through habitat modifications, on any species identified as a candidate, sensitive, or special status species in local or regional plans, policies, or regulations, or by the California Department of Fish and Game or U.S. Fish and Wildlife Service? o o o n
b. Have a substantial adverse effect on any riparian habitat or other sensitive natural community identified in local or regional plans, policies, regulations or by the California Department of Fish and Game or US Fish and Wildlife Service? 
c. Have a substantial adverse effect on federally protected wetlands as defined by Section 404 of the Clean Water Act (including, but not limited to, marsh, vernal pool, coastal, etc.) through direct removal, filling, hydrological interruption, or other means? 
d Interfere substantially with the movement of any resident or migratory fish or wildlife species or with established resident or migratory wildlife corridors, or impede the use of wildlife nursery sites? 
e. Conflict with any local policies or ordinances protecting biological resources, such as a tree preservation policy or ordinance? 
f. Conflict with the provisions of an adopted Habitat Conservation Plan, Natural Conservation Community Plan, or other approved local, regional, or state habitat conservation plan? 

Discussion

The proposed noise ordinance amendment is consistent with the City of Brentwood General Plan and is not in conflict with a policy to preserve the biological resources. Therefore, no impact would occur. 
Issues Potentially Significant Impact Potentially Significant With Mitigation Incorporated Less-Than-Significant Impact No Impact
V. CULTURAL RESOURCES.Would the project: 
a. Cause a substantial adverse change in the significance of a historical resource as defined in Section 15064.5? 
b. Cause a substantial adverse change in the significance of a unique archaeological resource pursuant to Section 15064.5? 
c. Directly or indirectly destroy a unique paleontological resource on site or unique geologic features? 
d. Disturb any human remains, including those interred outside of formal cemeteries.  

Discussion

The proposed noise ordinance amendment is consistent with the City of Brentwood General Plan and is not in conflict with a policy to preserve cultural resources. Therefore, no impact would occur. 

Issues Potentially Significant Impact Potentially Significant With Mitigation Incorporated Less-Than-Significant Impact No Impact
VI. GEOLOGY AND SOILS Would the project: 
a. Expose people or structures to potential substantial adverse effects, including the risk of loss, injury, or death involving: 
i. Rupture of a known earthquake fault, as delineated on the most recent Alquist - Priolo Earthquake Fault Zoning Map issued by the State Geologist for the area based on other substantial evidence of a known fault? 
ii. Strong seismic ground shaking? 
iii. Seismic-related ground failure, including liquefaction? 
iv. Landslides? 
b. Result in substantial soil erosion or the loss of topsoil? 
c. Be located on a geologic unit or soil that is unstable, or that would become unstable as a result of the project, and potentially result in on- or off-site landslide, lateral spreading, subsidence, liquefaction or collapse? 
d. Be located on expansive soil, as defined in Table 18-1B of the Uniform Building Code?  o o n
e. Have soils incapable of adequately supporting the use of septic tanks or alternative waste water disposal systems where sewers are not available for the disposal of waste water? o o o n
Discussion

The proposed noise ordinance amendment is consistent with the City of Brentwood General Plan and is not in conflict with a policy to preserve the geology and soils. Therefore, no impact would occur. 

Issues Potentially Significant Impact Potentially Significant With Mitigation Incorporated Less-Than-Significant Impact No Impact
VII. HAZARDS AND HAZARDOUS MATERIALSWould the project: 
a. Create a significant hazard to the public or the environment through the routine transport, use, or disposal of hazardous materials? 
b. Create a significant hazard to the public or the environment through reasonably foreseeable upset and accident conditions involving the likely release of hazardous materials into the environment? 
c. Emit hazardous emissions or handle hazardous or acutely hazardous materials, substances, or waste within one-quarter mile of an existing or proposed school? 
d. Be located on a site which is included on a list of hazardous materials sites compiled pursuant to Government Code Section 65962.5 and, as a result, would it create a significant hazard to the public or the environment? 
e. For a project located within an airport land use plan or, where such a plan has not been adopted, within two miles of a public airport or public use airport, would the project result in a safety hazard for people residing or working in the project area? 
f. For a project within the vicinity of a private airstrip, would the project result in a safety hazard for people residing or working in the project area? 
g. Impair implementation of or physically interfere with an adopted emergency response plan or emergency evacuation plan? 
h. Expose people or structures to the risk of loss, injury or death involving wildland fires, including where wildlands are adjacent to urbanized areas or where residences are intermixed with wildlands? 
Discussion

The proposed noise ordinance amendment is consistent with the City of Brentwood General Plan and is not in conflict with a policy that would create a hazard or hazardous material. Therefore, no impact would occur. 

Issues Potentially Significant Impact Potentially Significant With Mitigation Incorporated Less-Than-Significant Impact No Impact
VIII. HYDROLOGY AND WATER QUALITYWould the project: 
Violate any water quality standards or waste discharge requirements? o o o n
Substantially deplete groundwater supplies or interfere substantially with groundwater recharge such that there would be a net deficit in aquifer volume or a lowering of the local groundwater table level (i.e., the production rate of pre-existing nearby wells would drop to a level which would not support existing land uses or planned uses for which permits have been granted)? 
c. Substantially alter the existing drainage pattern of the site or area, including through the alteration of the course of a stream or river, in a manner which would result in substantial erosion or siltation on- or off-site? 
d. Substantially alter the existing drainage pattern of the site or area, including through the alteration of the course of a stream or river, or substantially increase the rate or amount of surface runoff in a manner which would result in flooding on- or off-site? 
e. Create or contribute runoff water which would exceed the capacity of existing or planned stormwater drainage systems or provide substantial additional sources of polluted runoff? 
f. Place housing within a 100-year floodplain, as mapped on a federal Flood Hazard Boundary or Flood Insurance Rate Map or other flood hazard delineation map? 
g. Place within a 100-year floodplain structures which would impede or redirect flood flows? 
h. Expose people or structures to a significant risk of loss, injury or death involving flooding, including flooding as a result of the failure of a levee or dam. 
i. Inundation by seiche, tsunami, or mudflow? 

Discussion

The proposed noise ordinance is consistent with the City of Brentwood General Plan and is not in conflict with a policy to preserve hydrology and water quality. Therefore, no impact would occur. 

Issues Potentially Significant Impact Potentially Significant With Mitigation Incorporated Less-Than-Significant Impact No Impact
IX. LAND USE AND PLANNING.Would the project: 
a. Physically divide an established community? 
b. Conflict with any applicable land use plans, policies, or regulations of an agency with jurisdiction over the project (including, but not limited to the general plan, specific plan, local coastal program, or zoning ordinance) adopted for the purpose of avoiding or mitigating on environmental effect? 
c. Conflict with any applicable habitat conservation plan or natural communities conservation plan? 

Discussion

The proposed project is consistent with the City of Brentwood General Plan land use designation and is not in conflict with a policy to preserve the environment. Therefore, no impact would occur. 

Issues Potentially Significant Impact Potentially Significant With Mitigation Incorporated Less-Than-Significant Impact No Impact
X. MINERAL RESOURCES.Would the project: 
a. Result in the loss of availability of a known mineral resource that would be of value to the region and the residents of the state? 
b. Result in the loss of availability of a locally-important mineral resource recovery site delineated on a local general plan, specific plan or other land use plan? 

Discussion

The proposed noise ordinance amendment is consistent with the City of Brentwood General Plan and is not in conflict with a policy to preserve mineral resources. Therefore, no impact would occur. 


Issues Potentially Significant Impact Potentially Significant With Mitigation Incorporated Less-Than-Significant Impact No Impact
XI. NOISE.Would the project result in: 
a. Exposure of persons to or generation of noise levels in excess of standards established in the local general plan or noise ordinance, or applicable standards of other agencies? o o o n
b. Exposure of persons to or generation of excessive groundborne vibration or groundborne noise levels? o o o n
c. A substantial permanent increase in ambient noise levels in the project vicinity above levels existing without the project? o o o n
d. A substantial temporary or periodic increase in ambient noise levels in the project vicinity above levels existing without the project? o o o n
e. For a project located within an airport land use plan or, where such a plan has not been adopted, within two miles of a public airport or public use airport, would the project expose people residing or working in the project area to excessive noise levels? o o o n
f. For a project within the vicinity of a private airstrip, would the project expose people residing or working in the project area to excessive noise levels? o o o n

Discussion

The proposed noise ordinance amendment is consistent with the City of Brentwood General Plan. The amendment expounds upon the noise aspects of the existing ordinance because these provisions are necessary for protection of the health, safety, and welfare of the residents of the City. Therefore, no impact would occur. 

Issues Potentially Significant Impact Potentially Significant With Mitigation Incorporated Less-Than-Significant Impact No Impact
XII. POPULATION AND HOUSING.Would the project: 
a. Induce substantial population growth in an area, either directly (for example, by proposing new homes and businesses) or indirectly (e.g., through projects in an undeveloped area or extension of major infrastructure)? o o o n
b. Displace substantial numbers of existing housing, necessitating the construction of replacement housing elsewhere? o o o n
c. Displace substantial numbers of people, necessitating the construction of replacement housing elsewhere? o o o n

Discussion

Housing is not part of the project proposal and no housing will be removed from the site thereby no impact would occur.

Issues Potentially Significant Impact Potentially Significant With Mitigation Incorporated Less-Than-Significant Impact No Impact
XIII. PUBLIC SERVICES.Would the project result in substantial adverse physical impacts associated with the provision of new or physically altered governmental facilities, need for new or physically altered governmental facilities, the construction of which could cause significant environmental impacts, in order to maintain acceptable service ratios, response times or other performance objectives for any of the public services: 
a. Fire protection? o o o n
b. Police protection? o o o n
c. Schools? o o o n
d. Parks? o o o n

Discussion

The nature of the noise ordinance amendment would not result in substantial adverse physical impacts in order to maintain acceptable service ratios, response times or other performance objectives for any of the public services. Therefore, no impact would occur. 

Issues Potentially Significant Impact Potentially Significant With Mitigation Incorporated Less-Than-Significant Impact No Impact
XIV. RECREATION.Would the project: 
a. Would the project increase the use of existing neighborhood and regional parks or other recreational facilities such that substantial physical deterioration of the facility would occur or be accelerated? o o o n
b. Does the project include recreational facilities or require the construction or expansion of recreational facilities which might have an adverse physical effect on the environment? o o o n

Discussion

The nature of the proposed project will not generate a need for recreational facilities and therefore, no impact would occur.

Issues Potentially Significant Impact Potentially Significant With Mitigation Incorporated Less-Than-Significant Impact No Impact
XV. TRANSPORTATION/CIRCULATION.Would the project: 
a. Cause an increase in traffic which is substantial in relation to the existing traffic load and capacity of the street system (i.e., result in a substantial increase in either the number of vehicle trips, the volume to capacity ratio on roads, or congestion at intersections)? o o o n
b. Exceed, either individually or cumulatively, a level of service standard established by the county congestion management agency for designated roads or highways? o o o n
c. Result in a change in air traffic patterns, including either an increase in traffic levels or a change in location that results in substantial safety risks? o o o n
d. Substantially increase hazards due to a design features (e.g., sharp curves or dangerous intersections) or incompatible uses (e.g., farm equipment)? o o o n
e. Result in inadequate emergency access? o o o n
f. Result in inadequate parking capacity? o o o n
g. Conflicts with adopted policies supporting alternative transportation (e.g., bus turnouts, bicycle racks)? o o o n

Discussion

The proposed noise ordinance amendment is consistent with the City of Brentwood General Plan and is not in conflict with a policy concerning transportation and circulation. Therefore, no impact would occur. 

Issues Potentially Significant Impact Potentially Significant With Mitigation Incorporated Less-Than-Significant Impact No Impact
XVI. UTILITIES AND SERVICE SYSTEMS.Would the project: 
a. Exceed wastewater treatment requirements of the applicable Regional Water Quality Control Board? o o o n
b. Require or result in the construction of new water or wastewater treatment facilities or expansion of existing facilities, the construction of which could cause significant environmental effects? o o o n
c. Require or result in the construction of new storm water drainage facilities or expansion of existing facilities, the construction of which could cause significant environmental effects? o o o n
d. Have sufficient water supplies available to serve the project from existing entitlements and resources, or are new or expanded entitlements needed? o o o n
e. Result in a determination by the wastewater treatment provider which serves or may serve the project that it has adequate capacity to serve the project’s projected demand in addition to the provider’s existing commitments? o o o n
f. Be served by a landfill with sufficient permitted capacity to accommodate the project’s solid waste disposal needs? o o o n
g. Comply with federal, state, and local statutes and regulations related to solid waste? o o o n

Discussion

The proposed noise ordinance amendment is consistent with the City of Brentwood General Plan and is not in conflict with a policy concerning utility and service systems. Therefore, no impact would occur.

Issues Potentially Significant Impact Potentially Significant With Mitigation Incorporated Less-Than-Significant Impact No Impact
XVII. MANDATORY FINDINGS OF SIGNIFICANCE. 
a. Does the project have the potential to degrade the quality of the environment, substantially reduce the habitat of a fish or wildlife species, cause a fish or wildlife population to drop below self﷓sustaining levels, threaten to eliminate a plant or animal community, reduce the number or restrict the range of a rare or endangered plant or animal or eliminate important examples of the major periods of California history or prehistory? o o o n

b. Does the project have impacts that are individually limited, but cumulatively considerable? ("Cumulatively considerable" means that the incremental effects of a project are considerable when viewed in connection with the effects of past projects, the effects of other current projects, and the effects of probable future projects)? o o o n
c. Does the project have environmental effects which will cause substantial adverse effects on human beings, either directly or indirectly? o o o n

Discussion

This proposed noise ordinance amendment would not create conditions that would substantial adverse effects on the residents of the City of Brentwood. 

EXHIBIT 3

ORDINANCE NO.____


AN ORDINANCE OF THE CITY COUNCIL OF THE CITY OF BRENTWOOD REPEALING CHAPTER 9.32, UNNECCESARY NOISE, AND ADOPTING A NEW CHAPTER 9.32, NOISE REGULATIONS 

WHEREAS, the City Council approved Ordinance No. 74 in 1954 to regulate disturbing noise;

WHEREAS, the current Chapter 9.32, Unnecessary Noise, is outdated and needs to be consistent with the City’s General Plan and the modern needs of a growing mixed land use community with potential conflicting noise issues and to meet the expectations of its citizens;

WHEREAS, the City’s Ordinance No. 74 and its amendments should be repealed in its entirety and new noise regulations adopted.

WHEREAS, a duly noticed public hearing on this project, including the Negative Declaration, was advertised in the Ledger-Dispatch; and

WHEREAS, the environmental effects of this proposed action have been considered in an Initial Study and Negative Declaration subject to the California Environmental Quality Act, which showed that there is no substantial evidence that the project may have a significant effect on the environment and the Planning Commission has considered the proposed Negative Declaration before making a recommendation on this project to the City Council; and 

WHEREAS, the Planning Commission held a public hearing on the proposed Municipal Code Amendment for the purpose of reviewing the Negative Declaration, staff report, which includes an analysis of the consistency of the proposed project with all goals and policies of the General Plan, considering all comments made by public testimony with the respect to this project amendment and all other pertinent documents; and

NOW, THEREFORE BE IT RESOLVED the City Council of the City of Brentwood does ordain as follows:

Section 1. Chapter 9.32. of the Brentwood Municipal Code is repealed.

Section 2. A new Chapter 9.32, Noise Regulations, is added to the Brentwood Municipal Code to read as follows:

Chapter 9.32 – Noise Regulations

Sections:

9.32.010 – Intent of Provisions
9.32.020 – Definitions
9.32.030 – Designated Noise Zones
9.32.040 – Sound Level Measurement
9.32.050 – Prohibited Special Noise Sources
9.32.060 – General Noise Regulations
9.32.070 – Exemptions
9.32.080 – Temporary Use Permits Required for Certain Activities
9.32.090 – Penalty
9.32.100 - Enforcement

9.32.010 – Intent of Provisions

A. Declaration of Policy:

1. The City Council enacts this legislation for the sole purpose of securing and promoting the public health, comfort, safety and welfare of its residents.

2. In order to control unnecessary, excessive and annoying noises in the City of Brentwood, it is declared to be the policy of the City to prohibit noise, which is detrimental to the health and welfare of its residents.

3. It shall be the policy of the City of Brentwood to maintain and preserve the quiet atmosphere of the City, and to implement programs and enact legislation consistent with the objectives and goals set forth in the noise element of the General Plan and aimed at retaining noise levels throughout the City acceptable values established in the General Plan.

9.32.020 – Definitions

A. The following words, phrases and terms, as used in this article, shall have the meanings as indicated:

Ambient noise means the composite of all noise from sources near and far, excluding the alleged intrusive noise source. The ambient noise level (or ambient level) is the normal or existing level of environmental noise at a given location.

A weighted sound level means the sound level as measured on a sound level meter using the “A” weighting network. The level so read is designated in units of dBA. 

Construction means any site preparation, assembly, erection, substantial repair, alteration, or similar action, for or of public or private right-of-way, structures, utilities or similar property.

Decibel means a unit for measuring the amplitude of a sound, equal to 20 times the logarithm to the base of ten of the ratio of the pressure of the sound measured to the reference pressure, which is 20 micropascals.

Designated noise zone means a zone consisting of real property corresponding to the City of Brentwood’s official zoning map and the noise element of the City’s General Plan, as it may be amended from time to time.

Emergency work means work made necessary to protect, provide or restore safe conditions in the community or for the citizenry, or work required to protect persons or property from an imminent exposure to danger, or work by private or public utilities when restoring utility service.

Fixed noise source means a stationary device, which creates sounds while in a fixed or stationary position, including but not limited to industrial and commercial machinery and equipment, pumps, fan compressors, generators, air-conditioners and refrigeration equipment.

Impulsive noise means a sound of short duration, and lasting less than one second with an abrupt onset and rapid delay.

Intrusive noise means that alleged offensive noise, which intrudes over and above the ambient noise for the receiving property.

Leq is the energy equivalent level, defined as the average sound level on the basis of sound energy ( or sound pressure squared). The Leq is a dosage type measured and I the basis for the descriptors used in current standards, such as the 24-hour CNEL used by the State of California.

Mobile noise source means ay noise source other than a fixed noise source.

Noise level (sound level) means the “A” weighted sound level.

Noise level limit means the maximum noise level acceptable under this article for the stated time period.

Noise sensitive property shall mean any property, regardless of zone, so designated in the noise element of the City’s General Plan. Noise sensitive properties include schools, hospitals, convalescent care, boarding and rest homes.

Person means any individual, firm, association, partnership, joint venture or corporation.

Public right-of-way means that area dedicated or subject to an easement for public use for vehicles and/or pedestrian travel including, but not limited to, streets, alleyways and sidewalks.

Pure tone shall mean any sound, which can be judged as audible as a single frequency or set of single frequencies. For the purpose of this chapter, a pure tone shall exist if the one-third octave band sound pressure level in the band with the tone exceeds the arithmetic average of the sound pressure levels of the two contiguous one-third octave band as follows: by five (5) dB for band frequencies between 160 and 400 Hz; or by 15 dB for band frequencies less than or equal to 125 Hz.

Receiving property means the property for which the intrusive noise is alleged to be offensive.

Sound amplifying equipment means any machine or device for the amplification of the human voice, music or other sound regardless of location. “Sound amplifying equipment” as used in this article, shall not include warning devices on authorized emergency vehicle or horns or other warning devices on any vehicles used only for traffic safety purposes.

Sound level meter means an instrument, including a microphone, an amplifier, an output meter, and frequency weighting networks for measurement of sound levels, which satisfies the requirements pertinent for sound level meters in American National Standard Institute specifications for sound level meters, section 1.4-1971, or the most recent revision therefore, for type S-2A sound meters.

Supplementary definition of technical terms. Definitions of technical terms not defined herein shall be obtained from American Standard Acoustical Terminology, section 1-1-1971 or the most recent revision thereof.

9.32.030 – Designated Noise Zones

A. Assignment of noise zones. Receiving properties are assigned to designated noise zones as follows:

1. Designated noise Zone I – Residential properties

2. Designated noise Zone II – Commercial properties

3. Designated noise Zone III – Industrial properties

B. Exterior noise levels.

1. Noise zone exterior noise levels. The following exterior noise levels, unless otherwise specifically indicated, shall apply to all receiving properties within a designated noise zone for the purpose of establishing noise level limits in Subsection B-2 below:

Zones #’s Designated Zone Time Interval Exterior Noise Levels
Zone I Residential 7 am – 10 pm 60
10 pm – 7 am 45
Zone II Commercial 7 am – 10 pm 60
10 pm – 7 am 45
Zone III Industrial 7 am – 10 pm 65
10 pm – 7 am 60

2. Noise level limits. Unless otherwise provided in this article, no person shall operate or cause to be operated any source of sound at any location within the city, or allow the creation of any noise on property owned, leased, occupied or otherwise controlled by such person which causes the noise level when measured on any receiving property to exceed the following noise level limits:

( a ) The exterior noise levels for that land use, as specified in Subsection B-1 above, for a total of more than 30 minutes in any consecutive 60 minutes;

( b ) The exterior noise levels plus 5 dB for a total period of more than 15 minutes in any consecutive 60 minutes;

( c ) The exterior noise levels plus 10 dB for a total period of more than 5 minutes in any consecutive 60 minutes; or

( d ) The exterior noise levels plus 15 dB for a total period of more than 1 minute in any consecutive 60 minutes; or

( e ) The exterior noise levels plus 20 dB for any time.

3. Ambient noise level in excess of noise level limits. If the ambient noise level exceeds that permissible for any of the noise level limits in Subsection 2 (a), (b), (c), and (d) above, the noise level limit shall be increased in 5 dB increments as appropriate to encompass or reflect said ambient noise level. In the event the ambient noise level exceeds the noise level limit in Subsection 2 (e) above, this limit shall be increased to the maximum ambient noise level.

4. Boundary between different zones. If the measurement location is on a boundary between two different designated noise zones, the lower noise level limit applicable to the two zones shall apply.

5. Content of intrusive noise. In the event the intrusive noise is judged by the enforcing officer to contain a steady, audible, pure tone such as a whine, screech or hum, or is an impulsive noise, or is a repetitive noise exceeding one second in duration or contains music or speech, the noise level limits set forth in Subsection 2 above, shall be reduced by 5 dB.

C. Interior noise levels.

1. Noise zone interior noise levels. The following interior noise levels, unless otherwise specifically indicated, shall apply within all receiving multi-family residential units within Noise Zone I and II for the purpose of establishing noise level limits in Subsection 2 below:

Time Interval Interior Noise
Multi-family residential 10:00 pm to 7:00am 40
7:00 am to 10:00 pm 45

2. Residential unit, interior noise level limits. No person shall operate or cause to be operated within a multi-family residential unit, any source of sound or allow the creation of any noise which causes the noise level when measured inside a neighboring receiving residential unit whether adjacent or not, to exceed the following noise level limits:

( a ) The interior noise levels as specified in Subsection 1 above for a total period of more than 5 minutes in any consecutive 60 minutes;

( b ) The interior noise levels, plus 5 dB for a total period of more than 1 minute in any consecutive 60 minutes; or

(c ) The interior noise levels, plus 10 dB for any period of time.

3. Ambient noise level in excess of noise level limits. If the ambient noise level exceeds that permissible for noise level limits in Subsection 2 (a) or (b) above, the limit shall be increased in 5 dB increments as appropriate to reflect said ambient noise level. In the event the ambient noise level exceeds the noise level limit in Subsection 2 (c) above, this limit shall be increased to the maximum ambient noise level.

4. Content of intrusive noise. In the event the intrusive noise is judged by the enforcing officer to contain a steady, audible, pure tone such as a whine, screech or hum, or is an impulsive noise or a repetitive noise exceeding one second in duration, or contains music or human voices, the noise level limits set forth in Subsection 2 above, shall be reduced by 5 dB.

9.32.040 Sound level measurement.

A. Use of "A" weighted sound level. Any sound levels measured pursuant to the provisions of this article shall be "A" weighted sound levels, measured with a sound level meter using the "A" weighting and slow response, except for impulsive noise, for which the fast response shall be used. The microphone should whenever possible be located four to five feet above the ground and ten feet or more from the nearest reflective surface.

B. Exterior noise measurement. The microphone shall not be less than 5 feet above ground, at least 5 feet distance from walls or other large reflecting surfaces, and shall be protected from the effects of wind noise by the appropriate windscreens. In cases when the microphone must be located within 10 feet of walls or similar large reflecting surfaces, the actual measured distance and orientation of sources, microphone and reflecting surfaces shall be noted and recorded. In no case shall a noise measurement be taken at 5 feet of the noise source. 

C. Interior noise measurement. Interior noise measurements shall be made within the affected residential unit. The measurements should whenever possible be made at a point at least four feet from the wall, ceiling or floor nearest the noise source with windows opened or closed at the discretion of the resident.

D. Calibration prior to measurement. Calibration of the measurement equipment, utilizing an acoustic calibrator, shall be performed prior to making any noise measurements.

E. Ambient noise level measurement. When ambient noise levels are measured, these levels should be measured whenever possible at a location and time of day comparable to that used for measuring the intrusive noise.

F. Method for sound level measurement. The director of community development may, from time to time, cause preparation of a noise control enforcement manual to assist in implementing the purpose of this article.

9.32.050 Prohibited Special Noise Sources.

A. Outside Heavy Construction. Monday through Thursday between the hours of 5:00 p.m. of one day and 8:00 a.m. of the next, Friday between the hours of 5:00 p.m. of one day and 9:00 a.m. of the next, Saturday after 4:00 p.m., and never on Sunday or City Holidays, no person adjacent to or within any residential zone in the city shall operate power construction equipment or perform any outside construction work, such as but not limited to, grading and trenching or operate any other construction device so as to create any noise, which exceeds the noise level limits of this article. These specified construction activities are permitted between the hours of 8:00 a.m. and 5:00 p.m. Monday through Friday, 9:00 a.m. and 4:00 p.m. Saturday with City Engineer approval only, and never on Sunday or City Holidays The performance of emergency work is exempt from the provisions of this section.

1. Home repairs and routine maintenance of personal property is not considered construction.

2. The Planning Commission and City Council shall retain the right to impose more restrictive hours of construction upon any projects involving construction activity by adding appropriate conditions to the city's approval of subdivisions, planned development permits, conditional use permits, variances and other projects.

B. Outside Carpentry Construction. Monday through Thursday between the hours of 7:00 p.m. of one day and 7:00 a.m. of the next, Friday between the hours of 7:00 p.m. of one day and 9:00 a.m. of the next, Saturday after 5:00 p.m. and never on Sunday or City Holidays, no person in a residential zone shall operate or permit the operation of any mechanically powered saw, sander, drill, grinder or similar tools, so as to create any noise which exceeds the noise level limits of this article unless it is within a completely enclosed structure. These specified domestic activities are permitted between the hours of 7:00 a.m. and 7:00 p.m. Monday through Friday, 9:00 a.m. and 5:00 p.m. Saturday and never on Sunday or City Holidays.

1. Home repairs, lawn mowing, gardening and routine maintenance of personal property is not considered construction.

C. Vehicles off public right-of-way. No person shall operate or cause to be operated any motor vehicle, off a right-of-way, in such a manner that the sound levels emitted there from exceed the noise level limits of this article.

D. Vehicle repair and testing. No person shall repair, rebuild, modify or test any motor vehicle in such a manner as to create any noise, which exceeds the noise level limits of this article.

9.32.060 General noise regulations

A. Environmental factors. The environmental factors which may be considered in determining whether a violation of provisions of subsection A. exists includes, but is not limited to, the following:

1. The sound level of the intrusive noise
2. The sound level of the ambient noise
3. The proximity of the noise to residential sleeping facilities
4. The nature and zoning of the area from which the noise emanates.
5. The number of persons affected by the alleged intrusive noise.
6. The time of day or night the noise occurs.
7. The duration of the noise and its tonal content.
8. Whether the noise is continuous, recurrent, or intermittent.

9.32.070 Exemptions.

A. The emission of sound for the purpose of alerting persons to the existence of an actual emergency or the emission of sound in the performance of emergency work shall not be subject to the provisions of this article. 

B. Warning devices necessary for the protection of public safety, as, for example, police and fire and ambulance sirens, including the testing of such devices shall not be subject to the provisions of this chapter.

C. Activities conducted on public playgrounds and public or private school grounds including but not limited to school athletic and school entertainment events, are exempt from the provisions of this article. Sounds emanating from regularly scheduled athletic events at city parks. 

D. Sounds or noise from lawful fireworks.

E. City authorized parades, street fairs, festivals or celebrations.

F. Construction activity or garbage collection performed by an agency of government provided that all equipment is operated in accordance with manufacturer’s specifications and is equipped with all noised reducing equipment in proper condition.

G. In-Home private parties are exempt from obtaining a Temporary Use Permit for activities, however they are not exempt from the noise standards within this chapter.

H. All agricultural and farming activities.

9.32.080 Temporary Use Permits Required for Certain Activities.

A. The City of Brentwood Community Development Department may grant a temporary use permit, which allows noncompliance with the limitations prescribed in this ordinance for the purpose of sound activities of short duration.

B. Permits may be granted upon application and when said application is in compliance with the provisions of Subsection ( c ) herein.

C. The following factors shall be considered in the initial investigation in order to determine whether granting of the permit in a condition injurious to health or safety:

1. Distance of proposed activities from any residential or noise sensitive zone;
2. Number of amplification devices, if any, to be used in the proposed activities;
3. Sound level capability of amplification devices and anticipated sound level;
4. Anticipated direction of amplification devices;
5. Anticipated duration of proposed activities;
6. Whether the activity will be held within or outside of structure;
7. Time of day and day of week or proposed activities;
8. Submit proposed activity plan to the Police Department for review and approval;
8. Any other consideration deemed necessary by the Community Development Department.

D. The permit, if issued shall specify the place, duration, and any restrictions appropriate to the proposed site of the activities.

E. Permits must be displayed and available for review by Police or Code Enforcement Officer upon request.

F. Issued permits will be surrendered to any Police or Code Enforcement Officer or other City official upon request when the restrictions of the permit have been violated.

G. Reapplication for a permit may be denied upon evidence of a complaint by a resident in the locality of the permitted activity or if an applicant has in the past been required to surrender a permit as described in Subsection ( F ).

H. A permit may be issued for more than one (1) occasion of activity. However, the time of such activity must be indicated on the application and cannot be for more than four (4) occasions or in excess of a six-week period.

I. If the City denies the temporary use permit the applicant may appeal the decision pursuant to Chapter 17.880 (Appeal) of the City of Brentwood’s Zoning Ordinance.

9.32.090 Penalty

A. Every person, firm, association or corporation violating any of the provisions of this chapter is guilty of a misdemeanor and upon conviction there-of shall be punishable by a fine of not more than five hundred (500) dollars, or by imprisonment in the county jail of Contra Costa County, state of California, for a period of not more than six (6) months, or by both such fine and imprisonment.

B. Every person, firm, association or corporation is guilty of a separate offensive for each and every day the provisions of this chapter are violated, and for every day during which any violation of this chapter or its provisions continues, such person, firm, association or corporation shall be punishable therefore as provided in Subsection “A” above.

9.32.100 Enforcement

A. The Code Enforcement Officer or Her/His duly authorized representative can monitor and enforce as appropriate the provisions of this chapter. No person shall interfere with, oppose or resist any authorized person charged with the enforcement of the chapter while such person is engaged in the performance of Her/His duty. Violators may be punished pursuant to Chapter 1.08 of the City of Brentwood’s Municipal Code.

SECTION 3. This ordinance shall go into effect and be in full force and operation from and after thirty (30) days after its final passage and adoption.


PASSED, APPROVED AND ADOPTED by the City Council of the City of Brentwood at a regular meeting on the 22ND day of January, 2002 by the following vote:


AYES: Councilmembers
NOES: 
ABSENT: 
ABSTAIN:
__________________ 
Michael A. McPoland, Sr.
Mayor

ATTEST:

___________________
Karen Diaz, CMC
City Clerk


State of California )
County of Contra Costa ) ss.
City of Brentwood )

I, Karen Diaz, City Clerk of the City of Brentwood, do hereby certify that the foregoing Ordinance had its first reading on January 22, 2002 and had its second reading on February 12, 2002 and was passed by the following vote:

AYES: Councilmembers 
NOES: 
ABSENT: 

_________________________ 
Karen Diaz, CMC
City Clerk

Top of Page