CHAPTER 9 NOISE ELEMENT - PDF Free Download

CHAPTER 9 NOISE ELEMENT 1.0 INTRODUCTION The Element of the General Plan establishes the policy framework for limiting exposure to objectionable noise. The Element includes an overview of noise terminology, a description of the effects of noise on humans, applicable State regulations, a summary of the City noise environment and a statement of goals and policies designed to minimize existing and foreseeable noise impacts. The Element is intended to guide decision-making for projects that may have potential noise impacts and in assessing compliance with California Insulation Standards. Analysis of existing and future noise environments within Placentia should be integrated into land use planning decisions. The Element presents the existing and future noise environments so that the City will include noise impact considerations when evaluating projects. and land use compatibility guidelines are presented, as well as noise standards for new development. 2.0 AUTHORITY FOR THE ELEMENT The Element follows guidelines as set forth in State Government Code Section 65302(f)(1). Administrative Draft November 2003 Page 9-1

a A n eelement which that shall identify and appraise noise problems in the community. The Element shall recognize the guidelines established by the Office of Control in the State Department of Health Services and shall analyze and quantify current and projected noise levels for all of the following sources: (1) highways and freeways; (2) primary arterials and major local streets; (3) passenger and freight on-line railroad operations and ground rapid transit systems; (4) commercial, general aviation, heliport, and military airport operations, aircraft operations, aircraft overflight, jet engine test stands, and all other ground facilities and maintenance functions related to airport operation; (5)local industrial plants, including but not limited to, railroad classification yards; (6) other ground stationary noise sources identified by local agencies as contributing to the community noise environment. 3.0 SUMMARY OF MEASUREMENTS AND STANDARDS 3.1 NOISE SCALES AND DEFINITIONS Decibels (db) are based on the logarithmic scale. The logarithmic scale compresses the wide range in sound pressure levels to a more usable range of numbers in a manner similar to the Richter scale used to measure earthquakes. In terms of human response to noise, a sound 10 db higher than another is judged to be twice as loud; and 20 db higher four times as loud; and so forth. Everyday sounds normally range from 30 dba (very quiet) to 100 dba (very loud). The A-weighted sound pressure level is the sound pressure level, in decibels, as measured on a sound level meter using the A-weighted filter network. The A-weighting filter deemphasizes the very low and very high frequency components of the sound, placing greater emphasis on those frequencies within the sensitivity range of the human ear. Examples, of various sound levels in different environments are shown in Table 9-1, Sound Levels and Human Response. Many methods have been developed for evaluating community noise to account for the following characteristics: The variation of noise levels over time; The influence of periodic individual loud events; and The community response to changes in the community noise environment. A variety of methodologies have been developed to measure sound over a period of time. These methods include: 1) the Community Equivalent Level (CNEL); 2) the Equivalent Sound Level (Leq); and 3) the Day/Night Average Sound Level (Ldn). 3.1.1 COMMUNITY NOISE EQUIVALENT LEVEL (CNEL) Community Equivalent Level (CNEL) is the primary community noise rating scale used in California for land use compatibility assessment. The CNEL quantifies an average of 24 hourly readings of equivalent levels, known as Leq s, based on an A-weighted decibel with upward adjustments added to account for increased noise sensitivity in the evening and night periods. These adjustments are +5 dba for the Page 9-2 Administrative Draft November 2003

evening, 7:00 p.m. to 10:00 p.m., and +10 dba for the night, 10:00 p.m. to 7:00 a.m. CNEL may be indicated by dba CNEL or just CNEL. 3.1.2 EQUIVALENT SOUND LEVEL (Leq) The Equivalent Sound Level (Leq) is the sound level containing the same total energy over a given sample time period. The Leq can be thought of as the steady sound level, which in a stated period of time would contain the same acoustic energy as the time-varying sound level during the same period. Leq is typically computed over 1, 8 and 24-hour sample periods. Table 9-1 Sound Levels and Human Response Source db(a) Level Response 150 Carrier Jet Operation 140 Harmfully Loud Jet Takeoff (200 feet; thence.) Discotheque 120 Unmuffled Motorcycle Auto Horn (3 feet; thence.) 110 Rock'n Roll Band Riveting Machine Loud Power Mower Jet Takeoff (2000 feet; thence.) 100 Garbage Truck Heavy Truck (50 feet; thence.) Pneumatic Drill (50 feet; thence.) 90 Alarm Clock Freight Train (50 feet; thence.) Vacuum Cleaner (10 feet; thence.) 130 Pain Threshold Maximum Vocal Effort Physical Discomfort Very Annoying Hearing Damage (Steady 8-Hour Exposure) 80 Annoying Freeway Traffic (50 feet; thence.) 70 Telephone Use Difficult Dishwashers Air Conditioning Unit (20 feet; thence.) 60 Intrusive Light Auto Traffic (100 feet; thence.) 50 Quiet Living Room 40 Bedroom Library Soft Whisper (15 feet; thence.) 30 Very Quiet Broadcasting Studio 20 10 Just Audible 0 Threshold of Hearing Source: Melville C. Branch and R. Dale Beland, Outdoor in the Metropolitan Environment, 1970, Page 2. Administrative Draft November 2003 Page 9-3

3.1.3 DAY/NIGHT AVERAGE (Ldn) Day/Night Average (Ldn) is an additional and commonly used method for measuring sound. The Ldn quantifies the 24-hour average noise level at a stationary location. Ldn has been adopted by the U.S. Environmental Protection Agency (EPA) for developing criteria for the evaluation of community noise exposure. It is based on a measure of the average noise level over a given time period which is the Leq. The Ldn is quantified through averaging the Leq s for each hour of the day at a given location after penalizing the sleeping hours (defined as 10:00 p.m. to 7:00 a.m.), by 10 dba to account for the increased sensitivity of people to noises that occur at night. 3.1.4 OTHER NOISE MATRICES The maximum noise level recorded during a noise event is typically expressed as Lmax. The sound level exceeded over a specified time frame can be expressed as Ln (i.e., L90, L50, L10, etc). L50 equals the level exceeded 50 percent of the time, L10 ten percent of the time, etc. Humans tend to respond to changes in sound pressure in a logarithmic manner. In general, a 1 dba change in the sound pressure levels of a given sound is detectable only under laboratory conditions. A 3 dba change in sound pressure level is considered as a just detectable difference in most situations. A 5 dba change is readily noticeable and a 10 dba change is considered a doubling (or halving) of the subjective loudness. It should be noted that a 3 dba increase or decrease in the average traffic noise level is realized by a doubling or halving of the traffic volume; or by about a 7 mile per hour (mph) increase or decrease in speed. For each doubling of distance from a point noise source, the sound level will decrease by 6 dba. In other words, if a person is 100 feet from a 12 dba noise source, and moves 200 feet from that source, sound levels will drop approximately 6 dba. For each doubling of distance from a line source, like a roadway, noise levels are reduced by 3 to 5 decibels, depending on the ground cover between the source and the receiver. barriers can provide approximately a 5 dba CNEL noise reduction (additional reduction may be provided with a barrier of appropriate height, material, location and length). A row of buildings provides up to 5 dba CNEL noise reduction with a 1.5 dba CNEL reduction for each additional row up to a maximum reduction of approximately 10 dba. The exact degree of noise attenuation depends on the nature and orientation of the structure and intervening barriers. 3.2 NOISE STANDARDS 3.2.1 FEDERAL NOISE STANDARDS Page 9-4 Administrative Draft November 2003

The United States Control Act of 1972 (NCA) recognized the role of the Federal government in dealing with major commercial noise sources in order to provide for uniform treatment of such sources. As Congress has the authority to regulate interstate and foreign commerce, regulation of noise generated by such commerce also falls under congressional authority. The Federal government specifically preempts local control of noise emissions from aircraft, railroad and interstate highways. The U.S. EPA has identified acceptable noise levels for various land uses, in order to protect public welfare, allowing for an adequate margin of safety, in addition to establishing noise emission standards for interstate commerce activities. 3.2.2 STATE NOISE STANDARDS The Office of Control in the State Department of Health Services has developed criteria and guidelines for local governments to use when setting standards for human exposure to noise and preparing noise elements for General Plans. These guidelines include noise exposure levels for both exterior and interior environments. In addition, Title 25, Section 1092 of the California Code of Regulations sets forth requirements for the insulation of multiple-family residential dwelling units from excessive and potentially harmful noise. The State indicates that locating units in areas where exterior ambient noise levels exceed 65 dba is undesirable. Whenever such units are to be located in such areas, the developer must incorporate into building design construction features, which reduce interior noise levels to 45 dba CNEL. Tables 9-2 and 9-3, summarize standards adopted by various State and Federal agencies. Table 9-2, and Land Use Compatibility Matrix, presents criteria used to assess the compatibility of proposed land uses with the noise environment. Table 9-3, State of California Interior and Exterior Standards, indicates standards and criteria that specify acceptable limits of noise for various land uses throughout the state. These standards and criteria will be incorporated into the land use planning process to reduce future noise and land use incompatibilities. These tables are the primary tools that allow the City to ensure integrated planning for compatibility between land uses and outdoor noise. 3.2.3 CITY NOISE ORDINANCE The City of Placentia has adopted a Ordinance noise standards for noise levels that sets forth standards for noise levels citywide and provides the means to enforce the reduction of objectionable or offensive noises (refer to Table 9-4, City Ordinance Standards). Chapter 23.76 of the Placentia Municipal Code establishes noise standards and enforcement procedures (the Ordinance ). The City s Ordinance is designed to protect people from objectionable nontransportation noise sources such as music, construction activity, machinery and pumps and air conditioners. Enforcement of the Ordinance ensures that adjacent properties are not exposed to excessive noise from stationary sources. Enforcing the Ordinance includes requiring proposed development to show compliance with the Ordinance, and requiring construction activity to comply with established Administrative Draft November 2003 Page 9-5

noise limits. The Ordinance will be reviewed periodically for adequacy and amended, as needed, to address community needs and development patterns. Table 9-2 and Land Use Compatibility Matrix Land Use Category Normally Acceptable Community Exposure Conditionally Acceptable Ldn or CNEL, db Normally Unacceptable Clearly Unacceptable Residential-Low Density 50-60 60-65 65-75 75-85 Residential-Multiple Family 50-60 60-65 65-75 75-85 Transient Lodging-Motel, Hotels 50-65 65-70 70-80 80-85 Schools, Libraries, Churches, Hospitals, Nursing Homes 50-60 60-65 65-80 80-85 Auditoriums, Concert Halls, Amphitheaters NA 50-65 NA 65-85 Sports Arenas, Outdoor Spectator Sports NA 50-70 NA 70-85 Playgrounds, Neighborhood Parks 50-70 NA 70-75 75-85 Golf Courses, Riding Stables, Water Recreation, Cemeteries Office Buildings, Business Commercial and Professional 50-70 NA 70-80 80-85 50-67.5 67.5-75 75-85 NA Industrial, Manufacturing, Utilities, Agriculture 50-70 70-75 75-85 NA NOTES: NORMALLY ACCEPTABLE Specified land use is satisfactory, based upon the assumption that any buildings involved are of normal conventional construction, without any special noise insulation requirements. CONDITIONALLY ACCEPTABLE New construction or development should be undertaken only after a detailed analysis of the noise reduction requirements is made and needed noise insulation features included in the design. Conventional construction, but with closed windows and fresh air supply systems or air conditioning will normally suffice. NORMALLY UNACCEPTABLE New Construction or development should be discouraged. If new construction or development does proceed, a detailed analysis of the noise reduction requirements must be made and needed noise insulation features included in the design. CLEARLY UNACCEPTABLE New construction or development should generally not be undertaken. NA: Not Applicable Source: Modified from U.S. Department of Housing and Urban Development Guidelines and State of California Standards. Page 9-6 Administrative Draft November 2003

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Table 9-3 State of California Interior and Exterior Standards Land Use Categories CNEL Categories Uses Interior 1 Exterior 2 Residential Single family Duplex, Multiple Family Mobile Home 45 3-55 45 50 B 60 65 4 Commercial Industrial Institutional Hotel, Motel, Transient Lodging Commercial Retail, Bank, Restaurant 45 55 -- -- Office Building, Research and Development, Professional Offices, City Office Building 50 -- Amphitheater, Concert Hall, Auditorium, Meeting Hall 45 -- Gymnasium (Multipurpose) Sports Club Manufacturing, Warehousing, Wholesale, Utilities Movie Theaters 50 55 65 45 -- -- -- -- Institutional Hospital, Schools, Classrooms Church, Library 45 45 65 -- Open Space Parks -- 65 SOURCE: State of California, Department of Health Services Office of Control NOTES: 1. Indoor environmental including: Bedrooms, living areas, bathrooms, toilets, closets, corridors. 2. Outdoor environment limited to: Private yard of single family Multi-family private patio or balcony which is served by a means of exit from inside the dwelling Balconies 6 feet deep or less are exempt Mobile home park Park's picnic area School's playground 3. level requirement with closed windows. Mechanical ventilating system or other means of natural ventilation shall be provided as of Chapter 12, Section 1205 of UBC. 4. Exterior noise levels should be such that interior noise levels will not exceed 45 CNEL. Page 9-8 Administrative Draft November 2003

Table 9-4 City of Placentia Ordinance Standards Zone Exterior Standard Interior Standard 1 55dB(A) 7am-10pm 50dB(A) 10pm-7am 2 65dB(A) Anytime 55dB(A) 7am-10pm 45dB(A) 10pm-7am 3 70 db(a) Anytime Zone 1: All Residential Property Zone 2: All Commercial Property Zone 3: All Industrial Property Source: City of Placentia Municipal Code. 3.3 EXISTING NOISE CONDITIONS sources in the City of Placentia fall into the following three basic categories: Train operations (from the Burlington Northern Santa Fe Railroad); Roadways; and Stationary sources (including industrial and commercial centers). 3.3.1 TRAIN OPERATIONS The primary noise source in the City of Placentia is the Burlington Northern Santa Fe Railroad (BNSF) line located in the southern portion of the City. This rail-line traverses the City in an east/west direction, generally parallel to Crowther and Orangethorpe Avenues. The rail corridor, which serves the ports of Los Angeles and Long Beach, is referred to as the Orange County Gateway. An estimated 50 trains per day, or two trains per hour, travel through this corridor. Approximately 90 percent of daily rail traffic is related to freight operations. The remaining traffic is comprised of passenger operations, including MetroLink and Amtrak service. The estimated 50 trains per day are forecast to increase to 100 trains per day by the year 2010 and to over 135 trains per day by the year 2020. The rail corridor is situated adjacent to residential, commercial and industrial uses. Residential developments and other sensitive uses located along the rail corridor would require sound insulation to mitigate noise to an acceptable level. Further, additional measures may be required to mitigate vibration. In anticipation of the projected increase in train traffic, the City of Placentia is a primary participant in the Orange North-American Trade Rail Access Corridor (On- Trac) Authority. Implementation of this project is anticipated to result in many environmental benefits to the City of Placentia including reduced noise and vibration. Administrative Draft November 2003 Page 9-9

3.3.2 ROADWAYS Traffic noise on surface streets is a significant source of noise within the community. Roadways in the City are designated according to five classifications: Freeway; Major Arterial; Primary Arterial; Secondary Arterial; and Collectors. Exhibit 9-1, Functional Roadway Classifications, illustrates the major roadways in the City along with their respective classification. levels along roadways are determined by a number of traffic characteristics, most important of which is the average daily traffic (ADT). Additional factors include the percentage of trucks, vehicle speed, the time distribution of traffic and gradient of the roadway. All roadway classifications within the City, excluding collectors, would be considered significant noise generators since these roadways would be the most frequently traveled. 3.3.3 STATIONARY NOISE SOURCES Stationary noise sources are defined as stationary devices that emit sound while fixed or motionless. These include but are not limited to parking lots, delivery areas, outdoor loudspeakers and mechanical equipment of various types (i.e., air compressors, generators, heating/ventilation/air conditioning units). These noise sources are typically associated with commercial and industrial land uses, which if located in proximity to residential land uses, may generate occasional noise impacts. Commercial uses are found throughout the City, primarily along major arterials. NOISE SENSITIVE RECEPTORS Housing is the predominant noise-sensitive land use in Placentia. Residential uses are considered noise-sensitive because; (1) considerable time is spent by individuals at home, (2) significant activities occur outdoors and (3) sleep disturbance is most likely to occur in residential areas. Mixed-use developments that include residential uses along major roadways are particularly sensitive since they are located in areas where higher noise levels are generated. Other noise-sensitive land uses within the City of Placentia include: Educational facilities; Libraries; Hospitals; Group quarters (i.e., senior housing); Park and recreation facilities; Daycare facilities; and Churches with daycare facilities. Page 9-10 Administrative Draft November 2003

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Exhibit 9-2, Sensitive Receptors, illustrates the locations of these noise sensitive receptors. Field measurements to identify ambient noise levels within the vicinity of these noise sensitive receptors were conducted on March 22, 2001. The noise monitoring equipment used for field measurements consisted of a Larson Davis Laboratories Model 700 integrating sound level meter equipped with a Bruel & Kjaer (B&K) Type 41762 microphone. Table 9-5, Field Measurements, details the noise levels measured at each noise sensitive receptor. 4.0 NOISE CONTOURS The noise environment for Placentia can be described using noise contours developed for the major noise sources within the City. These contours represent lines of equal noise exposure, just as the contour lines on a topographic map are lines of equal elevation. The contours shown are the 60 and 65 dba CNEL (Community Equivalency Level) contours. As previously stated, CNEL is a 24- hour time-weighted average noise level where noise which occurs during sensitive time periods is weighted more heavily. 60 CNEL The 60 CNEL contour defines the Study Zone. The noise environment for any proposed noise-sensitive land use (for example, single- or multi-family residences, hospitals, schools or churches) within this zone should be evaluated on a project specific basis. A project may require mitigation to meet City and/or State (Title 24) standards. A site- and project-specific study will be required to determine what types(s) of measures will be necessary to mitigate interior building environment to acceptable levels. Some sites may be sufficiently protected by existing walls or berms such that no further mitigation measures are required. 65 CNEL The 65 CNEL contour defines the Mitigation Zone. Within this contour, new or expanded noise-sensitive developments should be permitted only if appropriate mitigation measures, such as barriers or additional sound insulation, are included and City and/or State noise standards are achieved. In some instances it may be possible to show that existing walls, berms or screening may exist such that required mitigation is already in place. Page 9-12 Administrative Draft November 2003

Table 9-5 Field Measurements Sensitive Uses Site # Sensitive Receptor Leq dba Lmax dba 1 Autumn Hill Care Homes Inc. 56.7 68.7 2 Blessed Sacrament Children s Center 51.7 60.7 3 Bradford Park 69.5 81.6 4 Brookhaven Elementary School 52.8 61.5 5 El Camino Real High School 62.9 68.3 6 El Dorado High School 56.2 68.8 7 George Key School (Special Education) 55.3 72.1 8 Golden Elementary School 55.3 72.1 9 Green Valley Children s Center 54.8 66.9 10 Koch Park 55.3 72.1 11 Kraemer Middle School 53.5 65.1 12 Kraemer Park 63.0 74.5 13 La Placita Parkette 66.2 80.6 14 McFadden Ball fields 65.3 71.0 15 McFadden Park 65.3 71.0 16 Morse Elementary School 51.2 61.5 17 Mulberry Child Care 64.4 75.3 18 Parque de Los Ninos 53.8 60.1 19 Parque de Los Vaqueros 64.1 72.2 20 Placentia Champions Sports Complex 51.1 57.2 21 Placentia Head Start 65.3 71.0 22 Placentia Library 63.9 74.1 23 Placentia Linda Community Hospital 61.5 72.7 24 Richard R. Samp Park 52.2 67.6 25 Ruby Drive Elementary School 63.0 74.0 26 Sierra Vista Elementary School 54.2 62.3 27 Towne & Country Early Education Center 57.4 68.1 28 Tri-City Park 49.0 65.1 29 Tuffree Middle School 65.3 77.4 30 Tuffree Park 49.0 65.1 31 Tynes Elementary School 52.2 67.6 32 Valencia High School 53.5 65.1 33 Van Buren Elementary School 60.1 67.8 34 Wagner Elementary School 44.8 54.9 35 Wagner Park 44.8 54.9 36 Witten Center 65.3 71.0 Notes: 1. measurements based on 15-minute recording period. 2. Measurements recorded adjacent to abutting roadway. Source: monitoring survey conducted by RBF Consulting on March 22, 2001. Administrative Draft November 2003 Page 9-13

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TRAFFIC NOISE Existing and future (Year 2025) roadway noise levels within the City were projected using the Federal Highway Administration s Highway Prediction Model (FHWA RD-77-108) together with several roadway and site parameters. These parameters determine the projected impact of vehicular traffic noise and include the roadway cross-section (e.g., number of lanes), the roadway width, the average daily traffic (ADT), the vehicle travel speed, the percentages of auto and truck traffic, the roadway grade, the angle-of-view, the site conditions and the percent of total ADT which flows each hour throughout a 24-hour period. The model does not account for ambient noise levels (i.e., noise from adjacent land uses), or topographical differences between the roadways and adjacent land uses. projections are based on modeled vehicular traffic only as derived from the Circulation Element. Table 9-6, s, illustrates the noise environment as estimated in Year 2000 for existing land uses and traffic on major roadways and the future noise environment (Year 2025), as it would exist at full implementation of the General Plan. Exhibit 9-3, Existing s (2003) and Exhibit 9-4, Future s (2025), illustrate the noise contours for existing and future noise levels in the City, respectively. The inclusion of an area within a 60 or 65 CNEL contour shown in Exhibit 9-3 and 9-4 indicates that noise levels are high enough to be of potential concern. However, this does not imply that excessive noise levels are present uniformly on all properties within the area. Buildings, walls, berms and changes in topography affect noise levels. Some locations may be screened from noise impacts by the presence of one or more of these features. Table 9-6 illustrates the projected 60 db contours under Existing Conditions (2003) ranging between approximately 65 feet (Golden Avenue: East of Valencia Avenue) and 1,182 feet (Rose Drive: Palm Drive to Buena Vista Avenue) from the roadway centerlines, while the 65 db contour ranges between 20 feet (Golden Avenue: East of Valencia Avenue) and 374 feet (Rose Drive: Palm Drive to Buena Vista Avenue) from the roadway centerlines. Table 9-6 illustrates the projected 60 db contours under Build-Out (2025) ranging between approximately 56 feet (Bradford Avenue: Chapman Avenue to Crowther Avenue) and 1,499 feet (Rose Drive: Palm Drive to Buena Vista Avenue) from the roadway centerlines, while the 65 db contour ranges between 18 feet (Bradford Avenue: Chapman Avenue to Crowther Avenue) and 474 feet (Rose Drive: Palm Drive to Buena Vista Avenue) from the roadway centerlines. Page 9-16 Administrative Draft November 2003

Table 9-6 s Existing Conditions (2003) Build-Out (2025) Roadway Segment Average Daily Traffic dba @ 100 Feet from Roadway Centerline Distance from Roadway Centerline to: (Feet) 70 CNEL 65 CNEL 60 CNEL Average Daily Traffic dba @ 100 feet from Roadway Centerline Distance from Roadway Centerline to: (Feet) 70 CNEL 65 CNEL 60 CNEL Golden Avenue: Kraemer Ave. to Valencia Ave. 5,000 61.10 15 48 150 6,000 61.89 18 57 180 East of Valencia Ave. 4,000 57.43 6 20 65 4,000 57.43 6 20 65 Bastanchury Road: West of Placentia Ave. 18,000 66.67 54 171 542 25,000 67.92 75 238 751 Placentia Ave. to Kraemer Blvd. 22,000 67.54 66 209 662 35,000 69.39 105 333 1,054 Kraemer Blvd. To Valencia Ave. 16,000 64.87 36 113 358 23,000 66.28 51 163 515 East of Valencia Ave. 12,000 63.62 27 85 268 20,000 65.84 45 142 447 West of Rose Dr. 12,000 63.62 27 85 268 21,000 66.05 47 149 470 Yorba Linda Boulevard: West of Kraemer Blvd. 35,000 68.10 78 248 783 37,000 68.34 83 262 827 Kraemer Blvd. to Palm Dr. 32,000 67.71 72 226 716 40,000 68.68 89 283 895 Palm Dr. to Valencia Ave. 27,000 67.14 60 191 604 32,000 67.71 72 226 716 Valencia Ave. to Linda Vista St. 24,000 66.63 54 170 537 27,000 66.97 60 191 604 East of Rose Dr. 26,000 66.98 58 184 582 28,000 67.13 63 198 626 Palm Drive: Yorba Linda Blvd. to Valencia Ave. 9,000 63.66 27 86 271 11,000 64.53 33 105 331 Valencia Ave. to Tustin Ave. 11,000 65.70 43 137 433 14,000 66.75 55 175 552 Madison Avenue: West of Bradford Ave. 6,000 60.61 13 42 134 9,000 62.37 20 64 201 East of Bradford Ave. 7,000 61.28 16 50 157 9,000 62.37 20 64 201 Alta Vista Street: Kraemer Ave. to Rose Dr. 13,000 63.97 29 92 291 15,000 64.59 34 106 336 Rose Dr. to Jefferson St. 9,000 63.66 27 86 271 9,000 63.66 27 86 271 Jefferson St. to Van Buren St. 6,000 61.89 18 57 180 8,000 63.14 24 76 240 Chapman Avenue: Placentia Ave. to Melrose Ave. 35,000 66.85 56 179 565 24,000 65.21 39 122 387 Melrose Ave. to Bradford Ave. 35,000 66.85 56 179 565 22,000 64.84 36 112 355 Bradford Ave. to Kraemer Blvd. 21,000 67.34 63 200 632 21,000 67.34 63 200 632 Kraemer Blvd. to Orangethorpe Ave. 11,000 64.53 33 105 331 15,000 65.87 45 142 451 Crowther Avenue: West of Melrose Ave. 8,000 61.86 18 57 179 9,000 62.37 20 64 201 Melrose Ave. to Bradford Ave. 9,000 63.66 27 86 271 11,000 64.53 33 105 331 Bradford Ave. to Kraemer Blvd. 7,000 62.56 21 67 210 8,000 63.14 24 76 240 Kraemer Blvd. to Orangethorpe Ave. 7,000 62.56 21 67 210 7,000 62.56 21 67 210 Administrative Draft November 2003 Page 9-17

Table 9-6 Continued s Roadway Segment Average Daily Traffic Existing Conditions (2003) Build-Out (2025) dba @ 100 Feet from Roadway Centerline Distance from Roadway Centerline to: (Feet) 70 CNEL 65 CNEL 60 CNEL Average Daily Traffic dba @ 100 feet from Roadway Centerline Distance from Roadway Centerline to: (Feet) 70 CNEL 65 CNEL 60 CNEL Orangethorpe Avenue: Placentia Ave. to SR-57 31,000 68.86 93 295 933 44,000 70.38 132 418 1,323 SR-57 to Melrose Ave. 36,000 69.51 108 343 1,083 45,000 70.48 135 428 1,354 Melrose Ave. to Kraemer Blvd. 23,000 68.73 91 286 905 31,000 70.03 122 386 1,221 Kraemer Blvd. to Chapman Ave. 16,000 67.33 63 199 631 20,000 68.13 79 249 788 Chapman Ave. to Rose Dr. 24,000 69.09 95 299 946 29,000 69.74 114 361 1,142 Rose Dr. to Jefferson St. 23,000 68.90 91 286 905 24,000 68.92 95 299 946 Jefferson St. to Van Buren St. 23,000 68.90 91 286 905 23,000 68.73 91 286 905 Van Buren St. to Richfield Rd. 22,000 68.71 87 274 867 22,000 68.54 87 274 866 Richfield Rd. to Lakeview Ave. 21,000 68.51 83 262 828 23,000 68.73 91 286 905 Placentia Avenue: North of Bastanchury Rd. 10,000 62.83 22 71 224 11,000 63.24 25 78 246 Bastanchury Rd. to Yorba Linda Blvd. 19,000 65.62 43 135 425 21,000 66.05 47 149 470 Nutwood Ave. to Chapman Ave. 26,000 66.98 58 184 582 28,000 67.30 63 198 626 Chapman Ave. to Crowther Ave. 18,000 65.38 40 127 403 22,000 66.25 49 156 492 Crowther Ave. to Orangethorpe Ave. 19,000 65.62 43 135 425 21,000 66.05 47 149 470 Orangethorpe Ave. to La Jolla St. 11,000 63.24 25 78 246 10,000 62.83 22 71 224 Melrose Avenue: Chapman Ave. to Crowther Ave. 4,000 59.09 9 28 90 5,000 59.82 11 35 112 Crowther Ave. to Orangethorpe Ave. 10,000 62.83 22 71 224 12,000 63.62 27 85 268 Orangethorpe Ave. to La Jolla St. 16,000 64.87 36 113 358 18,000 65.38 40 127 403 Bradford Avenue: Madison Ave. to Chapman Ave. 9,000 59.61 10 32 101 11,000 60.25 12 39 124 Chapman Ave. to Crowther Ave. 9,000 59.61 10 32 101 5,000 56.82 6 18 56 Kraemer Boulevard: Golden Ave. to Bastanchury Rd. 20,000 67.12 60 190 601 28,000 68.42 84 266 843 Bastanchury Rd. to Yorba Linda Blvd. 22,000 66.25 49 156 492 30,000 68.72 90 286 903 Yorba Linda Blvd. to Alta Vista St. 27,000 67.14 60 191 604 35,000 69.39 105 333 1,054 Alta Vista St. to Chapman Ave. 25,000 68.09 75 238 751 30,000 68.72 90 286 903 Chapman Ave. to Crowther Ave. 22,000 66.25 49 156 492 34,000 69.26 102 323 1,023 Valencia Avenue: Golden Ave. to Bastanchury Rd. 8,000 61.86 18 57 179 10,000 62.83 22 71 224 Bastanchury Rd. to Yorba Linda Blvd. 10,000 61.41 16 51 161 11,000 61.83 18 56 178 Yorba Linda Blvd. to Palm Dr. 5,000 58.40 8 26 81 5,000 58.40 8 26 81 Page 9-18 Administrative Draft November 2003

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5.0 DESCRIPTION OF NOISE PLAN The primary noise source in the City of Placentia is the Burlington Northern Santa Fe Railroad (BNSF) rail line. As previously discussed, the On-Trac project is proposed to separate vehicular traffic at all rail crossings within the city. Implementation of this project is anticipated to reduce potential noise and vibration impacts in the City. Transportation noise is the second-most significant noise source in Placentia. However, local government has little direct control over transportation noise at the source. The most effective method for mitigating transportation noise is through site planning and the design and construction of noise barriers (generally a wall or berm). TYPICAL NOISE ATTENTUATION TECHNIQUES impacts can be mitigated in three basic ways; (1) by reducing the sound level of the noise generator, (2) by increasing the distance between the source and receiver and (3) insulating the receiver. reduction can be accomplished by the appropriate placement of walls, landscaped berms, or a combination of the two, between the noise source and the receiver. Generally, effective noise shielding requires a solid barrier with a mass of at least four pounds per square-foot of surface area which is large enough to block the line of sight between source and receiver. Variations may be appropriate in individual cases based on distance, nature and orientation of buildings behind the barrier, and a number of other factors. Garages or other buildings may be used to shield dwelling units and outdoor living areas from traffic noise. insulation can also be accomplished through proper building design. Nearby noise generators should be recognized in determining the location of doors, windows and vent openings. Sound-rated windows (extra thick or multi-paned) and wall insulation are also effective. These measures cannot realize their full potential unless care is taken in actual construction: doors and windows fitted properly; openings sealed; joints caulked; plumbing adequately insulated from structural members. Insulation of noise sensitive uses, such as residences, schools, libraries, hospitals, care homes and certain types of stationary noise sources can reduce noise impacts. More efficient approaches involve limiting the level of noise generation at the source. State and Federal statutes have preempted local control over vehicular noise emissions but commercial and industrial operations and certain residential activities provide opportunities for local government to assist in noise abatement. Local ordinances may establish maximum levels for noise generated on-site. This usually takes the form of limiting the level of noise permitted to leave the property where it may impact other uses. Although vehicular noise emissions standards are established at the State and Federal levels, local agencies can play a significant part in reducing traffic noise by controlling traffic volume and congestion. Traffic noise is greatest at intersections due to acceleration, deceleration and gear shifting. Measures such as signal Page 9-24 Administrative Draft November 2003

synchronization can help to minimize this problem. Likewise, reduction of congestion aids in reduction of noise. This can be accomplished through the application of traffic engineering techniques such as channelization of turning movements, parking restrictions, separation of modes (bus, auto, bicycle, pedestrian) and restrictions on truck traffic. reduction through reduction of traffic volumes can also be accomplished with incentive programs for use of public transit facilities and high-occupancy vehicles, staggering of work hours and land use controls. Vehicle trips can be turned into pedestrian trips with integration of housing and employment into the same project or area, construction of high-density, affordable housing in proximity to employment, shopping and public transit facilities and other techniques. NOISE AND LAND USE PLANNING The following methods are intended to prevent future noise and land use incompatibilities: Enforce standards that specify acceptable noise limits for various land uses throughout the City. Table 9-4 shows criteria used to assess the compatibility of proposed land uses with the noise environment. These criteria are the basis of specific noise standards. These standards, presented in Table 9-4, define City policy related to land uses and acceptable noise levels. Incorporate noise-reduction features during site planning to mitigate anticipated noise impacts on affected noise-sensitive land uses. The noise referral zones identified by 60 and 65 db CNELs in Exhibits 9-3 and 9-4 can be used to identify locations of potential conflict. New developments will be permitted only if appropriate mitigation measures are included such that the standards contained in this Element are met in accordance with Table 9-4. Enforce the provisions of the current State of California Uniform Building Code, which specifies that the indoor noise levels for multi-family residential living spaces not exceed 45 db CNEL due to the combined effect of all noise sources. The State requires special construction features to be incorporated within project design to attain this interior noise standard when the outdoor noise levels exceed 65 db CNEL. The Referral Zones (the 65 db CNEL contour) can be used to determine when this standard needs to be addressed. The Uniform Building Code requires that interior CNEL/Ldn with windows closed, attributable to exterior sources shall not exceed an annual CNEL or Ldn of 45 db in any habitable room. The code requires that this standard be applied to all new hotels, motels, apartment houses and dwellings other than detached singlefamily dwellings. The City will also apply this standard to single-family dwellings. Coordinate all land use planning and design efforts in the environs of the Burlington Northern Santa Fe Railroad line to be consistent with noise levels Administrative Draft November 2003 Page 9-25

for the railroad line. sensitive land uses should be prohibited inside the 65 CNEL contour projected for the railroad line and all noise sensitive land uses inside the 60 CNEL contour should be designed to mitigate railroad noise. NON-TRANSPORTATION NOISE CONTROL People must be protected from excessive noise from non-transportation sources, including commercial and industrial centers. These impacts are most effectively controlled through the application of the City s Ordinance. Enforce the City of Placentia Ordinance. The Ordinance protects people from non-transportation related noise sources such as music, machinery, pumps and air conditioners. Require that any proposed development and building projects demonstrate compliance with the City Element and Ordinance prior to project approval. Notify applicants for building permits that include mechanical equipment that this requirement exists. Require construction activity to comply with limits established in the City Ordinance. Ensure adequate noise control measures at all construction sites through provision of mufflers and the physical separation of machinery staging and maintenance areas from adjacent residential uses. Limit delivery hours for commercial and industrial uses with loading areas or docks fronting, siding, bordering, or gaining access on driveways adjacent to noise-sensitive uses. Exemption from this restriction shall be based solely on attaining full compliance with the nighttime noise limits of the noise ordinance. 6.0 PLANNING FACTORS, GOALS AND POLICIES The Element s goals and policies provide direction for compatible land use planning and noise integration and for reduced noise impacts throughout the community. TRANSPORTATION NOISE CONTROL Planning Factor Transportation sources are a major cause of noise within the City of Placentia. Controlling transportation noise sources is difficult, as the City has little control over reducing transportation noise due to State and Federal noise standards preemption. Goal N-1 Reduce noise impacts from transportation noise sources. Policies N-1.1 Require construction of barriers to shield noise-sensitive uses from excessive noise. Page 9-26 Administrative Draft November 2003

N-1.2 N-1.3 N-1.4 N-1.5 N-1.6 N-1.7 N-1.8 Ensure the inclusion of noise mitigation measures in the design of new roadway projects in Placentia. Reduce transportation noise through proper design and coordination of new or remodeled transportation and circulation facilities. Enforce City, State, and federal noise standards, especially those for automobile mufflers and modified exhaust systems. Ensure that the Zoning Ordinance, Circulation Element, and Land Use Element fully integrate the policies adopted as part of the Element. Monitor noise from buses and other heavy vehicles in residential areas. If necessary, consider alternate circulation routes for those types of vehicles. Discourage through-traffic in residential neighborhoods by use of one-way streets. Require that new equipment purchased by the City of Placentia comply with noise performance standards. NOISE AND LAND USE PLANNING INTEGRATION Planning Factor Land use planning decisions can provide potential noise impacts. The City of Placentia understands the importance of considering noise impacts in land use decisions. Goal N-2 Incorporate noise considerations into land use planning decisions. Policies N-2.1 N-2.2 N-2.3 Establish targeted limits of noise for various land uses throughout the community, in accordance with Table 9-4. Ensure acceptable noise levels near schools, hospitals, convalescent homes, churches, and other noise-sensitive areas, in accordance with Table 9-4. Establish standards for all types of noise not already governed by local ordinances or preempted by State or Federal law. N-2.4 Require noise-reduction techniques in site planning, architectural design, and construction where noise reduction is necessary. Administrative Draft November 2003 Page 9-27

N-2.5 Discourage and, if necessary, prohibit the exposure of noisesensitive land uses to noisy environments. Goal N-3 Minimize noise spillover from commercial uses into nearby residential neighborhoods. Policies N-3.1 N-3.2 N-3.3 N-3.4 Enforce the 65 db(a) State standard for exterior noise levels for all commercial uses. Require that a minimum of 15 feet be landscaped as a buffer between a commercial or mixed use structure and an adjoining residential parcel. Require that automobile and truck access to commercial properties located adjacent to residential parcels be located at the maximum practical distance from the residential parcel. Truck deliveries within the City to commercial and industrial properties abutting residential uses shall fully comply with the City s Ordinance. Goal N-4 Minimize the noise impacts associated with the development of residential units above ground floor commercial uses in mixed use developments. Policies N-4.1 N-4.2 N-4.3 N-4.4 Require that commercial uses developed as part of a mixed use project (with residential uses) not be noise-intensive. Require that mixed-use structures be designed to prevent transfer of noise and vibration from the commercial to the residential use. Orient mixed use residential units away from major noise sources. Locate balconies and openable windows of residential units in mixed use projects away from the primary street and other major noise sources. NON-TRANSPORTATION NOISE CONTROL Planning Factor Non-transportation sources can contribute negatively to the noise environment. Identification and mitigation of the noise sources will assist in reducing noise impacts within the City. Page 9-28 Administrative Draft November 2003

Goal N-5 Develop measures to control non-transportation noise impacts. Policies N-5.1 N-5.2 N-5.3 N-5.4 N-5.5 Review the City s existing noise ordinance and revise as necessary to better regulate noise-generating uses. Continue to enforce the Ordinance and make the public more aware of its utility. Where possible, resolve existing and potential conflicts between various noise sources and other human activities. Reduce noise generated by building activities by requiring sound attenuation devices on construction equipment. Establish and maintain coordination among the agencies involved in noise abatement. Administrative Draft November 2003 Page 9-29