WEST VALLEY BOULEVARD MIXED USE PROJECT NOISE IMPACT ANALYSIS. January 9, 2015

Transcription

1 WEST VALLEY BOULEVARD MIXED USE PROJECT NOISE IMPACT ANALYSIS January 9, 2015

2 Kunzman Associates, Inc WEST VALLEY BOULEVARD MIXED USE PROJECT NOISE IMPACT ANALYSIS January 9, 2015 Prepared by: Roma Stromberg, M.S. INCE Carl Ballard, LEED GA William Kunzman, P.E Town & Country Road, Suite 34 Orange, California (714)

3 Table of Contents I. Introduction and Setting... 1 A. Purpose and Objectives... 1 B. Project Location... 1 C. Project Description... 1 II. Noise and Vibration Fundamentals... 4 A. Noise Fundamentals... 4 B. Vibration Fundamentals... 5 III. Existing Noise Environment... 8 A. Existing Land Uses and Sensitive Receptors... 8 B. Ambient Noise Measurements... 8 IV. Regulatory Setting A. Federal Regulations B. State Regulations C. Local Regulations V. Analytical Methodology and Model Parameters A. Noise Modeling and Input VI. Impact Analysis A. Noise Impacts B. Vibration Impacts VII. Mitigation Measures A. Construction Mitigation B. Building Mitigation B. Operational Mitigation VIII. References APPENDICES Appendix A Larson Davis Model 820 SLM Output Appendix B RCNM Noise Modeling Output Appendix C FHWA RD Model Output

4 List of Tables Table 1. Definitions of Acoustical Terms... 6 Table 2. Ambient Noise Levels... 9 Table 3. State of California Land Use Compatibility for Community Noise Exposure Table 4. City of San Gabriel Exterior Noise Level Standards Table 5. City of San Gabriel Interior Noise Level Standards Table 6. Typical Construction Equipment Noise Levels Table 7. Comparison of Existing and Existing Plus Project Traffic Noise Levels Table 8. Typical Noise Attenuation Methods to Insulate the Noise Receiver Table 9. Parking Lot Noise Sources Table 10. Construction Equipment Vibration Source Levels Table 11. Typical Human Reaction and Effect on Buildings Due to Groundborne Vibration... 34

5 List of Figures Figure 1. Project Location Map... 2 Figure 2. Site Plan... 3 Figure 3. Common Noise Sources and Noise Levels... 7 Figure 4. Noise Measurement Location Map... 10

6 I. Introduction and Setting A. Purpose and Objectives The purpose of this report is to provide an assessment of the noise impacts resulting from the development of the proposed project and to identify mitigation measures that may be necessary to reduce those impacts. The noise issues related to the proposed land use and development have been evaluated in the context of the California Environmental Quality Act. The City of San Gabriel is acting as the lead agency responsible for preparation of the noise impact analysis, in accordance with California Environmental Quality Act authorizing legislation. Although this is a technical report, every effort has been made to write the report clearly and concisely. To assist the reader with those terms unique to noise analysis, a glossary of terms is provided in Section II of this report. B. Project Location The proposed development is located in the City of San Gabriel at West Valley Boulevard. A vicinity map showing the project location is provided on Figure 1. C. Project Description The proposed project consists of 155,880 square feet of residential development, 27,050 square feet of retail, 19,025 square feet of restaurant space, and 5,545 square feet of office space. A total of 452 parking spaces will be provided. Figure 2 illustrates the project site plan. The main access driveway would be located on Valley Boulevard and Prospect Avenue, which will allow for both residential and commercial access. A second driveway will be located on Bencamp Street, just east of New Avenue; this driveway will be exclusively residential.

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9 II. Noise and Vibration Fundamentals A. Noise Fundamentals Sound is a pressure wave created by a moving or vibrating source that travels through an elastic medium such as air. Noise is defined as unwanted or objectionable sound. The effects of noise on people can include general annoyance, interference with speech communication, sleep disturbance, and in extreme circumstances, hearing impairment. Commonly used noise terms are presented in Table 1. The unit of measurement used to describe a noise level is the decibel (db). The human ear is not equally sensitive to all frequencies within the sound spectrum. Therefore, the A weighted noise scale, which weights the frequencies to which humans are sensitive, is used for measurements. Noise levels using A weighted measurements are written db(a) or dba. From the noise source to the receiver, noise changes both in level and frequency spectrum. The most obvious is the decrease in noise as the distance from the source increases. The manner in which noise reduces with distance depends on whether the source is a point or line source as well as ground absorption, atmospheric effects and refraction, and shielding by natural and manmade features. Sound from point sources, such as air conditioning condensers, radiates uniformly outward as it travels away from the source in a spherical pattern. The noise drop off rate associated with this geometric spreading is 6 dba per each doubling of the distance (dba/dd). Transportation noise sources such as roadways are typically analyzed as line sources, since at any given moment the receiver may be impacted by noise from multiple vehicles at various locations along the roadway. Because of the geometry of a line source, the noise drop off rate associated with the geometric spreading of a line source is 3 dba/dd. Decibels are measured on a logarithmic scale, which quantifies sound intensity in a manner similar to the Richter scale used for earthquake magnitudes. Thus, a doubling of the energy of a noise source, such as a doubled traffic volume, would increase the noise levels by 3 dba; halving of the energy would result in a 3 dba decrease. Figure 3 shows the relationship of various noise levels to commonly experienced noise events. Average noise levels over a period of minutes or hours are usually expressed as dbal eq or the equivalent noise level for that period of time. For example, L eq(3) would represent a 3 hour average. When no period is specified, a one hour average is assumed. Noise standards for land use compatibility are stated in terms of the Community Noise Equivalent Level (CNEL) and the Day Night Average Noise Level (L dn ). CNEL is a 24 hour weighted average measure of community noise. CNEL is obtained by adding five decibels to sound levels in the evening (7:00 PM to 10:00 PM), and by adding ten decibels to sound levels at night (10:00 PM to 7:00 AM). This weighting accounts for the increased human sensitivity 4

10 to noise during the evening and nighttime hours. L dn is a very similar 24 hour average measure that weights only the nighttime hours. It is widely accepted that the average healthy ear can barely perceive changes of 3 dba; that a change of 5 dba is readily perceptible, and that an increase (decrease) of 10 dba sounds twice (half) as loud. This definition is recommended by the California Department of Transportation s Traffic Noise Analysis Protocol for New Highway and Reconstruction Projects (2009). B. Vibration Fundamentals The way in which vibration is transmitted through the earth is called propagation. Propagation of earthborn vibrations is complicated and difficult to predict because of the endless variations in the soil through which waves travel. There are three main types of vibration propagation: surface, compression and shear waves. Surface waves, or Raleigh waves, travel along the ground s surface. These waves carry most of their energy along an expanding circular wave front, similar to ripples produced by throwing a rock into a pool of water. Compression waves, or P waves, are body waves that carry their energy along an expanding spherical wave front. The particle motion in these waves is longitudinal (i.e., in a push pull fashion). P waves are analogous to airborne sound waves. Shear waves, or S waves, are also body waves that carry energy along an expanding spherical wave front. However, unlike P waves, the particle motion is transverse or side to side and perpendicular to the direction of propagation. As vibration waves propagate from a source, the energy is spread over an ever increasing area such that the energy level striking a given point is reduced with the distance from the energy source. This geometric spreading loss is inversely proportional to the square of the distance. Wave energy is also reduced with distance as a result of material damping in the form of internal friction, soil layering, and void spaces. The amount of attenuation provided by material damping varies with soil type and condition as well as the frequency of the wave. Construction operations generally include a wide range of activities that can generate groundborne vibration. In general, blasting and demolition of structures generate the highest vibrations. Vibratory compactors or rollers, pile drivers, and pavement breakers can generate perceptible amounts of vibration at up to 200 feet. Heavy trucks can also generate groundborne vibrations, which can vary depending on vehicle type, weight, and pavement conditions. Potholes, pavement joints, discontinuities, or the differential settlement of pavement all increase the vibration levels from vehicles passing over a road surface. Construction vibration is normally of greater concern than vibration from normal traffic flows on streets and freeways with smooth pavement conditions. Typically, particle velocity or acceleration (measured in gravities) is used to describe vibration. 5

11 Table 1 Definitions of Acoustical Terms 1 Term Decibel, db Frequency, Hertz A-Weighted Sound Level, dba Root Mean Square (RMS) Definition A logarithmic unit of noise level measurement that relates the energy of a noise source to that of a constant reference level; the number of decibels is 10 times the logarithm (to the base 10) of this ratio. In a function periodic in time, the number of times that the quantity repeats itself in one second (i.e., the number of cycles per second). The sound level obtained by use of A-weighting. The A-weighting filter deemphasizes the very low and very high frequency components of the sound in a manner similar to the frequency response of the human ear. A measure of the magnitude of a varying noise source quantity. The name derives from the calculation of the square root of the mean of the squares of the values. It can be calculated from either a series of lone values or a continuous varying function. Fast/Slow Meter Response L 02, L 08, L 50, L 90 Equivalent Continuous Noise Level, L eq L max, L min Ambient Noise Level The fast and slow meter responses are different settings on a sound level meter. The fast response setting takes a measurement every 100 milliseconds, while a slow setting takes one every second. The A-weighted noise levels that are equaled or exceeded by a fluctuating sound level, 2 percent, 8 percent, 50 percent, and 90 percent of a stated time period, respectively. A level of steady state sound that in a stated time period, and a stated location, has the same A-weighted sound energy as the time-varying sound. L max is the RMS (root mean squared) maximum level of a noise source or environment measured on a sound level meter, during a designated time interval, using fast meter response. L min is the minimum level. The all-encompassing noise environment associated with a given environment, at a specified time, usually a composite of sound from many sources, at many directions, near and far, in which usually no particular sound is dominant. Offensive/ Offending/ Intrusive Noise The noise that intrudes over and above the existing ambient noise at a given location. The relative intrusiveness of sound depends on its amplitude, duration, frequency, and time of occurrence, and tonal information content as well as the prevailing ambient noise level. 1 Adapted from: Cyril M. Harris; Handbook of Acoustical Measurement and Noise Control,

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13 III. Existing Noise Environment A. Existing Land Uses and Sensitive Receptors The proposed development is located at West Valley Boulevard in the city of San Gabriel. The project site is bordered on the north by Valley Boulevard and on the south by Bencamp Street. Access to the site is proposed to be from both Valley Boulevard and Bencamp Street. Current land uses on the project site include commercial and residential development. Commercial and residential land uses border the site to the west; residential land uses border the site to the south and east and commercial land uses are located north of the project site (across and along Valley Boulevard). The State of California defines sensitive receptors as those land uses that require serenity or are otherwise adversely affected by noise events or conditions. Schools, libraries, churches, hospitals, single and multiple family residential, including transient lodging, motels and hotel uses make up the majority of these areas. Sensitive receptors that may be affected by project generated noise include single and multi family residential dwelling units located south, east and west of the project site and a medical clinic located just west of the project site. B. Ambient Noise Measurements An American National Standards Institute (ANSI Section SI4 1979, Type 1) Larson Davis model LxT sound level meter was used to document existing ambient noise levels. Three 15 minute daytime noise measurements were taken between 11:26 AM and 12:26 PM on August 29, As shown Table 2, measured ambient noise levels ranged between 53.6 to 66.2 dba L eq. Measurement output data is included in Appendix A. As shown on Figure 4, the first noise measurement was taken approximately 50 feet south of Valley Boulevard; the second noise measurement was taken in the alley south of the project north of Bencamp Street; and the third noise measurement was taken east of New Avenue south of Valley Boulevard. The dominant noise source was from vehicle traffic traveling on New Avenue and Valley Boulevard. Pedestrians talking, vehicle engines starting and idling, and vehicle horns were also audible during noise measurements. 8

14 Table 2 Ambient Noise Levels 1 Name Time Period Measurement Period M1 11:24 AM - 11:41 AM 15 min M2 11:51 AM - 12:06 PM 15 min M3 12:11 PM - 12:26 PM 15 min Description South side of Valley Boulevard in front of project location. Approximately 50 ft from centerline. In alley next to 413 W. Bencamp Street. Alley is lined with approximately 6 ft high cinder block walls. In parking space at 532 W. Valley Boulevard. Next to neighboring buiding. Approx 50 ft from centerline. Existing Ambient Noise Levels (dba) L eq L max L 2 L 8 L 25 L Source: Site Visit, Kunzman Associates, Inc. (August 29, 2014) 9

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16 IV. Regulatory Setting A. Federal Regulations 1. Federal Noise Control Act of 1972 The U.S. Environmental Protection Agency (EPA) Office of Noise Abatement and Control was originally established to coordinate federal noise control activities. After its inception, EPA s Office of Noise Abatement and Control issued the Federal Noise Control Act of 1972, establishing programs and guidelines to identify and address the effects of noise on public health, welfare, and the environment. In response, the EPA published Information on Levels of Environmental Noise Requisite to Protect Public Health and Welfare with an Adequate Margin of Safety (Levels of Environmental Noise). The Levels of Environmental Noise recommended that the Ldn should not exceed 55 dba outdoors or 45 dba indoors to prevent significant activity interference and annoyance in noisesensitive areas. In addition, the Levels of Environmental Noise identified five (5) dba as an adequate margin of safety for a noise level increase relative to a baseline noise exposure level of 55 dba Ldn (i.e., there would not be a noticeable increase in adverse community reaction with an increase of five dba or less from this baseline level). The EPA did not promote these findings as universal standards or regulatory goals with mandatory applicability to all communities, but rather as advisory exposure levels below which there would be no risk to a community from any health or welfare effect of noise. In 1981, EPA administrators determined that subjective issues such as noise would be better addressed at lower levels of government. Consequently, in 1982 responsibilities for regulating noise control policies were transferred to State and local governments. However, noise control guidelines and regulations contained in EPA rulings in prior years remain in place by designated Federal agencies, allowing more individualized control for specific issues by designated Federal, State, and local government agencies. B. State Regulations 1. State of California Building Code Residential Units Title 24 of the California Code of Regulations, also known as the California Building Standards Code (2013) establishes uniform minimum noise insulation performance standards to protect persons with hotels, motels, dormitories, apartment houses and dwellings other than single family detached residential dwelling units from the effects of excessive noise, including, but not limited to, hearing loss or impairment, and interference with speech and sleep. The code provides acoustical regulations for both exterior to interior sound insulation, as well as sound and impact isolation between adjacent spaces of various occupied units. Title 24 regulations state that interior noise 11

17 levels generated by exterior noise sources shall not exceed 45 dba Ldn/CNEL, with windows closed, in any habitable room for general residential uses. Section 1208A, Sound Transmission, of the California Building Code requires acoustical evaluation and insulated building design and construction when exterior noise levels exceed 60 Ldn. New residential construction must be acoustically designed and constructed to reduce the intrusion of transportation noise and local fixed noise sources. Specifically, the California Building Code requires that a minimum Sound Transmission Class of 50 (STC50) and Impact Isolation Class 50 (IIC50) for multi family attached residential dwelling units be achieved. Non Residential Units Section of the California Green Building Standards Code found Part 11 of Title 24, sets forth mandatory measures that require wall and roof ceiling assemblies to achieve an STC rating of at least 50 and exterior windows must have minimum STC rating of 30 where sound levels at the property line regularly exceed 65 db, other than occasional sounds due to church bells, train horns, emergency vehicles and emergency warning systems. Buildings with few or no occupants and where occupants are not likely to be affected by exterior noise, as determined by the enforcement authority, such as factories, stadiums, storage, enclosed parking structures and utility buildings are exempt from this STC 50 and STC 30 requirements. 2. State of California General Plan Guidelines 2003 Though not adopted by law, the State of California General Plan Guidelines 2003, published by the California Governor s Office of Planning and Research (OPR) (OPR Guidelines), provide guidance for the compatibility of projects within areas of specific noise exposure. The OPR Guidelines identify the suitability of various types of construction relative to a range of outdoor noise levels and provide each local community some flexibility in setting local noise standards that allow for the variability in community preferences. Findings presented in the Levels of Environmental Noise Document (EPA 1974) influenced the recommendations of the OPR Guidelines, most importantly in the choice of noise exposure metrics (i.e., Ldn or CNEL) and in the upper limits for the Normally Acceptable outdoor exposure of noise sensitive uses. The OPR Guidelines include a Noise and Land Use Compatibility Matrix (Shown in Table 3) identifies acceptable and unacceptable community noise exposure limits for various land use categories. The City of San Gabriel has adopted their own land use/noise compatibility guidelines which are discussed below under Section C, Local Regulations. 3. California Environmental Quality Act CEQA requires analysis of noise related to the proposed project in light of local plans and ordinances and other applicable standards of other agencies. CEQA also requires evaluation of potential noise impacts related to aircraft and the project's potential to result in substantial temporary or permanent increases in ambient noise levels. CEQA also requires the evaluation of potential groundborne vibration impacts. Applicable local 12

18 regulations related to noise and regulations related to vibration are discussed below under subsection C, Local Regulations. Industry accepted standards for what is considered to be a substantial increase in noise ranges from 3 db to 12 db. It should be noted that a change of 3 db is considered to be barely audible to a trained ear and that a change of 5 db is considered to be a readily audible change. The City of San Gabriel has not identified a numerical increase that would represent a substantial increase in noise levels. For the purposes of this analysis, increases in traffic noise due to the project's contribution will be considered to be "substantial" if project generated increases in noise levels cause an increase of 3 dba CNEL or greater at a sensitive receptor and if: (1) the existing noise levels already exceed the residential land use compatibility standard for "normally acceptable" (60 dba CNEL for single family residential dwelling units and 65 dba CNEL for multiple family residential dwelling units). 4. California Department of Transportation (Caltrans) The California Department of Transportation (Caltrans) has published one of the seminal works for the analysis of groundborne noise and vibration relating to transportation and construction induced vibrations and although the project is not subject to these regulations, it serves as useful tools to evaluate vibration impacts. These guidelines recommend that a standard of 0.2 inches per section (in/sec) PPV not be exceeded for the protection of normal residential buildings (Caltrans 2002). No use may generate any ground transmitted vibration that is perceptible to the human sense of touch measured at the outside boundary of the immediate space occupied by the enterprise generating the vibration if the enterprise is one of several located on a lot, or at the lot line if the enterprise generating the vibration is the only enterprise located on a lot. C. Local Regulations 1. City of San Gabriel General Plan Applicable policies and standards governing environmental noise in the City are set forth in the General Plan Noise Element. Those applicable to the proposed project are presented below. Table 4 presents the exterior noise levels which apply to all receptor properties within any particular designated zone, while Table 5presents the interior noise levels for residential dwellings. Goal 9.2: Goal 9.4: Goal 9.5: Minimize the impact of traffic noise for those who live and work on our major roadways. Protect residents from the harmful effects of noise from mechanical equipment and trucks. Provide our schools, libraries, churches, hospitals and parks with the quiet they need to function effectively. 13

19 Goal 9.6: Promote the health of our community by protecting it from the harmful effects of noise. 2. Valley Boulevard Sustainability Plan The Valley Boulevard Sustainability Plan emphasizes that major new commercial development should be focused at key centers along corridors and intervening areas should be used for residential and mixed use structures that integrate housing with retail and office uses. The Plan states that this mixed use approach will reduce automobile use, energy consumption, air pollution, and noise, increase pedestrian activity, increase the customer base for local businesses, and spur economic activity. The Sustainability Plan does not set forth specific noise goals, policies or standards. 3. City of San Gabriel Ordinance The City s Municipal Code includes several references to noise control that apply depending on the zoning of the site. The site is officially zoned Mixed Use Corridor. The Municipal Code does not set forth specific noise standards for the MU C zone. Therefore, the following sections of the Municipal Code that are applicable to land uses adjacent to and proposed as part of the project will be utilized for the purpose of this analysis, as the ordinance. Section (T) Maintenance of Premises; Nuisances Maintenance or operation, between the hours of 10:00 PM and 7:00 AM, any device, instrument, vehicle or machinery in such a manner as to create noise or cause vibrations which cause discomfort or annoyance to reasonable persons of normal sensitivity, or which endangers the comfort, repose, health or peace of the public or of any person using or occupying other property in the vicinity is prohibited. Section Noise Caused by Machinery It shall be unlawful for any person to run or operate any mechanical, electrical, electronic, hydraulic, or wind driven equipment, fan, pump, compressor, blower, motor, engine, machine, or other similar apparatus which causes, or is likely to cause, any loud, excessive, unnecessary, or unusual continued or intermittent noise, or any noise which annoys, disturbs, injures, or endangers the comfort, repose, health, peace, or safety of others within the city unless such noise is muffled effectually and the apparatus is either equipped with a muffler device in constant operation and properly maintained to deaden such noise, or the apparatus is enclosed in a room, building, or other enclosure sufficiently insulated to deaden such noise. Section Construction; Hours of Construction No construction shall take place within the city except between the hours of 7:00 AM and 7:00 PM, Monday through Friday and between the hours of 8:00 AM and 4:00 PM on Saturday. Construction shall be prohibited on Sundays and on such holidays as may be designated by Council resolution. The Community Development Director may extend the hours of operation for special circumstances by providing written notice to surrounding residents in advance. 14

20 Acoustical Analysis (Multiple Family Residence Zones (R 3). Prior to the issuance of any building permits for new homes within 1,000 feet of the I 10 Freeway, within 500 feet of any rail line and within 200 feet of any arterial street, the applicant shall submit an acoustical analysis to the Community Development Director. This analysis shall indicate the existing and projected Community Noise Equivalent Levels (CNEL's) on the site and the method by which the noise is to be controlled or reduced to no more than 45 db within the interior living space of all proposed dwelling units (H) (1) Development Standards Prior to the issuance of any building permits for new homes in areas zoned R 2 or R 3, within 1,000 feet of the I 10 Freeway, within 500 feet of any rail line and within 200 feet of any arterial street, the applicant shall submit an acoustical analysis to the Director of Public Works. This analysis shall indicate the existing and projected CNEL's on the site and the method by which the noise is to be controlled or reduced to no more than 65 db within the exterior living space and no more than 45 db within the interior living space of all proposed dwelling units Performance Standards (Commercial and Industrial Zones (C 1, C 3, AND M 1). The following performance standards shall apply to all commercial and industrial uses located in the C 1, C 3, and M 1 zone districts. Noise. No use may violate the city's noise standards. Vibration. No use may generate any ground transmitted vibration that is perceptible to the human sense of touch measured at the outside boundary of the immediate space occupied by the enterprise generating the vibration if the enterprise is one of several located on a lot, or at the lot line if the enterprise generating the vibration is the only enterprise located on a lot. 15

21 Table 3 State of California Land Use Compatibility for Community Noise Exposure (dba CNEL or L dn ) 1 Land Use Residential-Low Density Single Family, Duplexes and Mobile Homes Residential Multi-Family Dwellings Transient Lodging: Motels, Hotels Schools, Libraries, Churches, Hospitals, Nursing Homes Auditoriums, Concert Halls, Amphitheaters Sports Arenas, Outdoor Spectator Sports Playgrounds, Neighborhood Parks Golf Courses, Riding Stables, Water Recreation, Cemeteries Office Buildings, Businesses, Commercial and Professional Industrial, Manufacturing, Utilities, Agriculture Normally Acceptable: Conditionally Acceptable: Normally Unacceptable: Clearly Unacceptable: Specified land uses is satisfactory based upon the assumption that any buildings involved are of normal conventional construction, without any special noise insulation or requirements. 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. Outdoor environment will seem noisy. New construction and development should generally be discouraged. If new construction or development does proceed, a detailed analysis of the noise reduction requirements must be made with needed noise insulation features included in the design. Outdoor areas must be shielded. New construction or development should generally not be undertaken. Construction costs to make the indoor environment acceptable would be prohibitive and the outdoor environment would not be usable. 1 Source: Governor s Office of Planning and Research

22 Table 4 City of San Gabriel Exterior Noise Standards 1 Noise Zone Designated Noise Zone Land Use Allowable Exterior Noise Level (db) (Receptor property) Time Interval Standard 1 Standard 2 Standard 3 Standard 4 Standard 5 I Noise sensitive area Anytime II III Residential Commercial 10:00 PM to 7:00 AM (nighttime) 10:00 PM to 7:00 AM (nighttime) :00 AM to 10:00 PM (daytime) 7:00 AM to 10:00 PM (daytime) IV Industrial Anytime Standard No. 1 is the exterior noise level that may not be exceeded for more than a total of 30 minutes in any hour. Standard No. 2 is the exterior noise level that may not be exceeded for more than a total of 15 minutes in any hour. Standard No. 3 is the exterior noise level that may not be exceeded for more than a total of five minutes in any hour. Standard No. 4 is the exterior noise level that may not be exceeded for more than a total of one minute in any hour. Standard No. 5 is the exterior noise level that may not be exceeded for any period of time 1 Source: City of San Gabriel General Plan Noise Element,

23 Table 5 City of San Gabriel Interior Noise Standards 1,2 Noise Zone All Designated Noise Zone Land Use Allowable Interior Noise Level (db) (Receptor property) Time Interval Standard 1 Standard 2 Standard 3 10:00 PM to 7:00 AM (nighttime) Residential 7:00 AM to 10:00 PM (daytime) Standard No. 1 is the interior noise level that may not be exceeded for more than a total of five minutes in any hour. Standard No. 2 is the interior noise level that may not be exceeded for more than a total of one minute in any hour. Standard No. 3 is the interior noise level that may not be exceeded for any period of time 1 Source: City of San Gabriel General Plan Noise Element, The interior noise levels for residential dwellings shall apply within all such dwellings with windows in their normal seasonal configuration. 18

24 V. Analytical Methodology and Model Parameters A. Noise Modeling and Input 1. Road Construction Noise Model (RCNM) A worst case construction noise scenario was modeled using the Federal Highway Administration s Roadway Construction Noise Model (RCNM). RCNM utilizes standard noise emission levels for many different types of equipment and includes utilization percentage, impact, and shielding parameters. Modeling parameters and output are provided in Appendix B. 2. Federal Highway Administration (FHWA) Traffic Noise Prediction Model Existing, Existing Plus Project and Future noise levels along acoustically significant area roadways were modeled utilizing the FHWA Traffic Noise Prediction Model FHWA RD , as modified for CNEL and the Calveno energy curves. This model arrives at a predicted noise level through a series of adjustments to the Reference Energy Mean Emission Level (REMEL). Adjustments are then made to the REMEL to account for total average daily trips (ADT), roadway classification, width, speed and truck mix, roadway grade and site conditions (hard or soft ground surface). Areas adjacent to all modeled roadways were assumed to be "hard sites to predict worst case, conservative noise levels. A hard site, such as pavement, is highly reflective and does not attenuate noise as quickly as grass or other soft sites. Possible reductions in noise levels due to intervening topography and vegetation were not accounted for in the analysis. Project traffic volumes and vehicle mix were obtained from the project's traffic study (KOA Corporation 2014). Existing Plus Project traffic volumes were calculated by adding the proposed project trips to existing traffic volumes. The City of San Gabriel does not have a published Day/Evening/Night (D/E/N) split for use in acoustical studies. For existing conditions, road segments were assigned D/E/N splits recommended and published by the Riverside County Department of Industrial Hygiene for noise modeling. Vehicle speed was based on the posted speed limits and/or observation. FHWA worksheets are included in Appendix B. 19

25 VI. Impact Analysis A. Noise Impacts This impact discussion analyzes the potential for project construction noise and operational noise to cause an exposure of persons to or generation of noise levels in excess of established City of San Gabriel noise standards related to construction noise, and transportation related noise impacts both to the proposed project and caused by the proposed project. 1. Construction Noise Sensitive receptors that may be affected by project generated noise include single and multi family residential dwelling units located south, east and west of the project site and a medical clinic located just west of the project site. The closest sensitive receptors that would be affected by project construction are single family detached residential dwelling units located approximately feet south of the project site; multi family attached residential dwelling units located west of the project site and adjacent to the southwestern border; and a medical clinic located approximately 55 feet west of the project. These land uses may be affected by short term noise impacts associated the transport of workers, the movement of construction materials to and from the project site and from ground demolition, clearing, excavation, grading, and building activities. Construction noise will vary depending on the construction process, type of equipment involved, location of the construction site with respect to sensitive receptors, the schedule proposed to carry out each task (e.g., hours and days of the week) and the duration of the construction work. Equipment used on the site may be mobile or stationary. Mobile equipment (e.g., loaders, graders, dozers) would typically move around a construction site performing tasks in a recurring manner. Stationary equipment (e.g., air compressor, generator, concrete saw) operates in a given location for an extended period of time to perform continuous or periodic operations. Operational characteristics of heavy construction equipment are additionally typified by short periods of full power operation followed by extended periods of operation at lower power, idling, or powered off conditions. Typical noise sources and noise levels associated with construction activities are shown in Table 6Error! Reference source not found.. The loudest phase of construction is expected to be the site preparation phase which would include demolition, grading, compacting, and excavating. Equipment and vehicles that may be used during site preparation would include backhoes, bulldozers, loaders, excavation equipment (e.g., graders and scrapers), and compaction equipment. The use of pile drivers is not anticipated. Finishing activities may include the use of pneumatic hand tools, scrapers, concrete trucks, vibrators, and haul trucks. A worst case one hour construction noise scenario was modeled to determine what construction noise levels would be at the nearest sensitive receptors (adjacent residential properties) using the FHWA Roadway Construction Noise Model (RCNM). The worst case 20

26 scenario included three pieces of equipment most likely to be operated simultaneously near the adjacent single family residences during the demolition/excavation phase (backhoe, dozer, and dump truck). The equipment was modeled at a distances ranging between feet from the receptor. Unmitigated construction noise levels experienced at the sensitive receptors nearest to the project site could reach 82.2 dba L eq. The loudest piece of equipment that may be used on the project site (a jackhammer) operating at the property line could generate a maximum noise level of up to 94.9 dbal max if operated within 25 feet of a sensitive receptor. Prolonged use of jackhammer or other similar stationary noise sources within 250 feet would result in noise levels that exceed 75 dba CNEL. This equipment should be shielded from existing sensitive receptors. Mitigation requiring shielding is included in Section VII of this report. The resulting increases over ambient noise levels would be temporary in nature, and would not generate continuously high noise levels. Modeling parameters and output are provided in Appendix B. Consistency with Applicable Standards City of San Gabriel General Plan Noise Element The City s General Plan Noise Element establishes Goals intended to protect residents from the harmful effects of noise from mechanical equipment and trucks. With adherence to the allowed hours for construction presented in Municipal Code Section and implementation of the mitigation measures presented in Section VII of this report, the proposed project will be consistent with the City s General Plan Noise Element Goals. City of San Gabriel Municipal Code Pursuant to Municipal Code Section , construction activities may occur between the hours of 7:00 AM and 7:00 PM on weekdays, 8:00 AM and 4:00 PM Saturdays, and is prohibited on Sundays. These permitted hours of construction are included in the code in recognition that construction activities undertaken during daytime hours are a typical part of living in an urban environment and do not cause a significant disruption. In addition to establishing controlled hours for construction activities, the City of San Gabriel has also established ordinances to restrict nuisance noise caused by vehicles and machinery. Compliance with these ordinances and implementation of the mitigation measures presented in Section VII of this report will greatly reduce construction noise impacts to nearby sensitive receptors. 2. Noise Impacts to Off Site Receptors Due to Project Generated Traffic Existing and Existing Plus Project noise levels for each roadway segment analyzed in the traffic study prepared for the proposed project (KOA Corporation 2014) were modeled utilizing the FHWA Traffic Noise Prediction Model FHWA RD Project generated increases in ambient noise levels along affected road segments were then calculated. Modeling output is included in this report as Appendix C. Existing traffic noise modeling resulted in noise levels ranging between and dba L eq at 50 feet from the centerline of the affected road segments; and the Existing 21

27 Plus Project traffic noise model resulted in noise levels ranging from to dba L eq at 50 feet from the affected road segments. According to the traffic study prepared for the project (KOA 2014), the project will generate 100 daily residential vehicle trips traveling on Bencamp Street which will also utilize the Bencamp driveway. As shown in Table 2, the measured ambient noise level representative of the driveway location is 53.6 dba L eq. Noise levels associated with 100 average daily trips are not expected to exceed 39.0 db CNEL and would not increase the ambient noise level. Approximately 6 8 trash trucks servicing commercial and residential land uses will visit the site per week via the Alley off of Bencamp Street. This alley is currently utilized to access several single family homes east of the project site. Noise levels associated with a typical garbage truck pick up can reach up to 87 dba at a distance of 50 feet for a few minutes (Daly, Standlee & Associates, Inc. 2003). This noise would occur with regular residential and commercial trash pickup at similar residential and commercial land uses adjacent to the project site. Consistency with Applicable Standards As shown in Table 7, in no case would project generated vehicle traffic cause an increase in the ambient noise levels that exceeds 0.8 db. As previously discussed increases in traffic noise due to the project's contribution will be considered to be "substantial" if project generated increases in noise levels cause an increase of 3 dba CNEL or greater at a sensitive receptor and if: (1) the existing noise levels already exceed the residential land use compatibility standard for "normally acceptable" (60 dba CNEL for single family residential dwelling units and 65 dba CNEL for multiple family residential dwelling units). Project generated traffic would not result in substantial increases in ambient noise levels. No mitigation is required. 3. Noise Impacts to the Proposed Project Associated with Future Traffic Buildout noise levels along Valley Boulevard were modeled using the FHWA Traffic Noise Prediction Model FHWA RD Unmitigated buildout traffic noise levels could reach up to dba CNEL at the facade of buildings proposed adjacent to Valley Boulevard. Consistency with Applicable Standards Title 24, California Building Code Construction of the proposed project will be required to adhere to Title 24 which states that interior noise levels within multiple family residential dwelling units generated by exterior noise sources shall not exceed 45 dba Ldn/CNEL, with windows closed, in any habitable room for general residential uses. In order to ensure this standard is met, all exposed exterior wall assembly/window combinations proposed adjacent to West Valley Boulevard (facing north), and all west facing wall assembly/window combinations of the proposed four story building will need to provide exterior to interior noise reduction of 22

28 28.1 db. Typical construction methods that can be utilized to achieve this noise reduction are presented items 1 8 in Table 8. All other exterior residential wall assemblies will need to implement measures similar to items 1 6 listed in Error! Reference source not found. to achieve at least 20 dba of exterior to interior noise reduction. A measure requiring the developer to provide evidence that the proposed wall assembly/window combinations provide adequate exterior to interior noise reduction (at least 20 db) is included in Section VII of this report. Construction of the proposed office/commercial/retail/restaurant buildings will be required to comply with Section of the California Green Building Standards which require wall and roof ceiling assemblies to achieve STC ratings of at least 50 and windows to have a minimum STC rating of 30. The City Building Division will require evidence showing that assembly/wall combinations will be utilized that meet these requirements. City of San Gabriel General Plan The City s General Plan Noise Element sets forth goals to minimize the impact of traffic noise for those who live and work on major roadways and to protect residents from the harmful effects of noise. Because the City does not have standards expressly for vehicular sources, project impacts were evaluated in light of the state's Land Use Compatibility for Community Noise Exposure Matrix (Table 3), which provides guidelines for noise levels (CNEL) based on land use. The guidelines state that the proposed residential units would be normally acceptable in areas with noise levels up to 65 dba CNEL; conditionally acceptable in areas with noise levels up to 70 dba CNEL and normally unacceptable in areas with noise levels that exceed 70 dba. If new construction or development proceeds in an area with noise levels that exceed 70 dba CNEL, it is recommended that a detailed analysis of the noise reduction requirements be made and necessary noise reduction features be included in the project design. It is also recommended that outdoor use areas be shielded. Unmitigated buildout traffic noise levels could reach up to dba CNEL at the facade of buildings proposed adjacent to West Valley Boulevard. This exterior noise level exceeds the conditionally allowable exterior noise level of 70 dba CNEL. No active outdoor land uses are proposed near West Valley Boulevard. However, if rooftop gardens and/or balconies are proposed these may also be exposed to noise levels that exceed 65 dba CNEL. Mitigation measures to ensure that interior noise levels at the proposed residences do not exceed 45 dba CNEL are presented in Section VII of this report. The state land use compatibility guidelines also set forth noise/land use compatibility criteria for office and commercial land uses. The guidelines state that the proposed office and commercial development would be normally acceptable in areas with noise levels up to 70 dba CNEL and conditionally acceptable in areas with noise levels up to 80 dba CNEL. The guidelines recommend that new construction occurs only after a detailed analysis of the noise reduction requirements is made and needed noise insulation 23

29 features included in the design. Future buildout traffic noise levels are not expected to exceed dba CNEL at the facade of proposed office and commercial buildings. Construction methods required by State Title 24 will provide at least 20 db of exterior to interior noise reduction for the proposed office and commercial spaces. No mitigation is required to achieve acceptable interior noise levels in the proposed office and commercial buildings. Proposed outdoor dining areas south of Prospect Avenue and adjacent to West Valley Boulevard will also be exposed to noise levels of up to 71.36dBA CNEL. However, this noise level will drop off considerably as distance is gained from the roadway (approximately 3 db per doubling of distance). Adjacent buildings will also provide shielding from traffic noise. Finally, it should be noted that individuals who choose to patronize this location will be aware of the noise level and would only be exposed for short periods of time. This is not considered to be a significant impact. Residence terraces and gardens (identified as 6 and 7 on Figure 2), will be shielded from traffic noise by existing and proposed buildings and are of sufficient distance from West Valley Boulevard and will not be exposed to noise levels that exceed 65 dba CNEL. No mitigation is necessary. Municipal Code City Ordinances and require that an acoustical study be prepared for new development in areas where existing noise levels exceed 65 dba CNEL. This analysis is to indicate the existing and projected CNEL's on the site and the method by which the noise is to be controlled or reduced to no more than 65 db within the exterior living space and no more than 45 db within the interior living space of all proposed dwelling units. Compliance with Title 24 of the State Code and implementation of Mitigation Measure 1 using methods similar to those shown in Table 8Error! Reference source not found., will achieve acceptable interior noise levels. Valley Boulevard Sustainability Plan The Valley Boulevard Sustainability Plan recognizes the urban nature of the project area. The Plan also emphasizes that areas in between major commercial centers should be used for residential and mixed use structures that integrate housing with retail and office uses and that this mixed use approach will reduce automobile use, energy consumption, air pollution, and noise. The proposed project is consistent with this goal. 5. Stationary Noise Impacts The proposed project would introduce new noise sources into the existing noise environment. These new noise sources would include retail activities, residential activities, parking lot activities, truck deliveries, loading dock activities, and activities associated with a trash compactor and community trash receptacle. On Site Retail Uses 24

30 Future residents within the Project may experience noise due to human activity within the area from patrons using commercial/retail businesses proposed on site. Potential noise sources associated with retail uses on site include people talking, music from dining uses, and other noise associated with commercial activity. Roadway noise would be a more prominent noise source and, therefore, noise generated by human activity would not result in a significant impact. Residential Activities Future residents located on the Project, as well as off site uses, may experience noise due to an increase in human activity within the area. Potential residential type noise sources include people talking, doors slamming, stereos, domestic animals, and other noises associated with human activity. These noise sources are not unique and generally contribute to the ambient noise levels experienced in all residential areas. Parking Lot Noise Underground and above ground parking is proposed. Representative maximum noise levels associated with parking lot activities are presented in Table 9. Noise associated with below grade and enclosed parking structures are similar to the noise generated by parking lots. However, much of the noise within the parking area is not audible outside of the structure. Although ventilation equipment will be required in order to improve the air quality conditions which may create a new stationary noise source, this equipment would be enclosed within the parking lot structures on the lower level (below grade) and would not result in substantial increases in ambient noise levels. Entry and exit from the underground parking would be partially masked by background noise from traffic on West Valley Boulevard. Noise associated with the proposed underground parking garage would not result in substantially greater noise levels than currently exist at the project site. Noise sources and noise levels that may be associated with the eight vehicle parking lot proposed adjacent to Bencamp Street are shown in Table 9. The nearest existing residential property line is approximately 50 feet south of this parking lot. These noise sources are similar to those that already occur in the project area. As mentioned previously, the project site is located within the Valley Boulevard Sustainability Plan area which recognizes the urban nature of the project area. Truck Bay Loading and Unloading Noise Delivery trucks may access the project site via the existing Alley off of Bencamp Street and load and unload materials at the proposed truck bays that take access onto the alley. Operational noise levels associated with truck bay loading and unloading were projected to the nearest sensitive receptor utilizing sound reference levels from the SoundPLAN model. Attenuation provided by the existing 5.5 foot high concrete barrier along the eastern side of the alley was incorporated in the analysis. Noise levels associated with the proposed loading can be expected to reach up to 45.1 dba L eq and 60.1 dba L max at the nearest sensitive receptor. 25

31 Truck Pass By, Trash Compactor and Receptacle Noise Heavy truck deliveries and trash collection trucks typically generate maximum instantaneous noise levels of 70 to 75 dba Lmax at a distance of 50 feet. Potentially affected homes along the alley located north of Bencamp Street are as close as ten feet from the center of the northbound/eastbound alley lane. Truck pass by noise at these single family residential units may reach up to 89 dba L max. Low speed truck noise results from a combination of engine, exhaust, and tire noise as well as the intermittent sounds of back up alarms and releases of compressed air associated with truck/trailer air brakes. The noise level of backup alarms can vary depending on the type and directivity of the sound, but maximum noise levels are typically in the range of 65 to 75 dba Lmax at a distance of 50 feet or up to 89 db L max at the nearest sensitive receptor. A trash compactor is proposed at the eastern side of the proposed project and approximately 45 feet west of existing single family residential units. Trash compactors typically generate maximum noise levels of 50 to 60 dba Lmax at 50 feet, depending on the power rating and enclosure characteristics. Noise associated with compactor noise is not expected to exceed 61 dba L max at the nearest sensitive receptor. This noise would noticeable at the nearest sensitive receptor but would only last for a few minutes and is not likely to annoy persons of normal sensitivity during daytime hours. It may however, cause sleep disruption if operated during nighttime hours. Consistency with Applicable Standards Municipal Code Section of the City Municipal code prohibits the maintenance or operation, between the hours of 10:00 PM and 7:00 AM, any device, instrument, vehicle or machinery in such a manner as to create noise or cause vibrations which cause discomfort or annoyance to reasonable persons of normal sensitivity, or which endangers the comfort, repose, health or peace of the public or of any person using or occupying other property in the vicinity is prohibited Parking lot noise and noise created by general retail and residential activities is not expected to result in discomfort or annoyance of sensitive receptors. No mitigation is required. Project generated noise is expected to reach up to 45.1 dba L eq (loading dock activities), and up to 89.8 dba Lmax (delivery or garbage truck pass by) at the nearest sensitive receptor. Delivery and garbage truck usage of the alley north of Bencamp Street and operation of the trash compactor near the alley are likely to cause discomfort and annoyance to nearby sensitive receptors if they occur between the hours of 10:00 PM and 7:00 AM. Mitigation has been added to Section VII of this report to avoid this potential impact. 26

32 B. Vibration Impacts This impact discussion analyzes the potential for the proposed project to cause an exposure of persons to or generation of excessive groundborne vibration or groundborne noise levels. Vibration levels in the project area may be influenced by construction activities and from the ongoing operations of the proposed project. Table 10 shows the peak particle velocities (PPV) of some common construction equipment and Table 11 shows typical human reactions to various levels of PPV as well as the effect of PPV on buildings. A vibration impact would generally be considered significant if it involves any construction related or operations related impacts in excess of 0.2 inches per second (in/sec) PPV. The construction and operations related vibration impacts have been analyzed separately below. 1. Construction Related Vibration Table 10 shows the peak particle velocities of some common construction equipment and haul trucks (loaded trucks). The most vibration causing piece of equipment that will likely be used on site is the vibratory roller. This piece of equipment may be annoying and have the potential to result in architectural damage to buildings 25 feet or closer to the equipment. Operation of vibratory equipment that occurs 25 feet or closer to the existing adjacent residential units could also result in residence annoyance. Mitigation measures to reduce potential impacts to structures are presented in Section VII of this report. Annoyance related impacts would be short term and would only occur during site grading and preparation activities. Based on Caltrans data, haul trucks would not be anticipated to exceed 0.10 in/sec peak particle velocity (PPV) at 10 feet (Caltrans 2002). Predicted vibration levels at the nearest off site and on site structures, which are located in excess of 10 feet from the traveled roadway segments, would not be anticipated to exceed even the most conservative threshold of 0.2 inch/second PPV. 2. Consistency with Applicable Standards City of San Gabriel Section of the City of San Gabriel Municipal Ordinance states that no use within a C 1, C 3, or M 1 zone district may generate any ground transmitted vibration that is perceptible to the human sense of touch measured at the outside boundary of the immediate space occupied by the enterprise generating the vibration. Vibratory equipment is not proposed or anticipated to be utilized during operation (tenancy) of the proposed project. Pursuant to Municipal Code Section , construction activities may occur between the hours of 7:00 AM and 7:00 PM on weekdays, 8:00 AM and 4:00 PM Saturdays, and is prohibited on Sundays. These permitted hours of construction are included in the code in recognition that construction activities undertaken during daytime hours are a typical part of living in an urban environment and do not cause a significant disruption. 27

33 In addition to establishing controlled hours for construction activities, the City of San Gabriel has also established ordinances to restrict nuisance noise caused by vehicles and machinery. Compliance with these ordinances and implementation of the mitigation measures presented in Section VII of this report will greatly reduce vibration impacts. 28

34 Table 6 Typical Construction Equipment Noise Levels 1 Range of Maximum Suggested Maximum Sound Levels Measured Sound Levels for Analysis Type of Equipment (dba at 50 ft.) (dba at 50 ft.) Rock Drills Jack Hammers Pneumatic Tools Pumps Dozers Scrapers Haul Trucks Cranes Portable Generators Rollers Tractors Front-End Loaders Hydraulic Backhoe Hydraulic Excavators Graders Air Compressors Trucks Source: Bolt, Beranek & Newman; Noise Control for Buildings and Manufacturing Plants,

35 Table 7 Comparison of Existing and Existing Plus Project Traffic Noise Levels Distance from Modeled Noise Levels (dba CNEL) roadway Existing Roadway Segment centerline to receiver (ft) Existing Plus Project Increase Exceeds Standards Substantial Increase North of Ramona Street YES NO Ramona Street to Valley Boulevard YES NO New Avenue Valley Boulevard to Bencamp Street YES NO Bencamp Street to Norwood Place YES NO Norwood Place to Saxon Avenue YES NO South of Saxon Avenue YES NO Prospect Avenue North of Valley Boulevard NO NO North of East Wells Street YES NO Del Mar Avenue East Wells Street to Valley Boulevard YES NO South of Valley Boulevard YES NO West of New Avenue YES NO New Avenue to Prospect Avenue YES NO Valley Boulevard Prospect Avenue to Abbot Avenue YES NO Abbot Avenue to Del Mar Avenue YES NO East of Del Mar Avenue YES NO Bencamp Street East of New Avenue NO NO 30

36 Table 8 Typical Noise Attenuation Methods to Insulate the Noise Receiver 1 Noise Level Reduction dba dba dba Typical Mitigation Methods 1. Air conditioning or mechanical ventilation. 2. Double-paned glass. 3. Solid core doors with weather stripping and seals. Mitigation 1, 2, and 3 plus 4. Stucco or brick veneer exterior walls or wood siding w/one-half inch thick fiberboard underlayer. 5. Glass portions of windows/doors not to exceed 20 percent of wall. 6. Exterior vents facing noise source shall be baffled. Mitigation 1 through 6 plus 7. Interior sheetrock of exterior wall attached to studs by resilient channels or double walls. 8. Window assemblies, doors, wall construction materials, and insulation shall have a lab-tested STC rating of 30 or greater. 1 Source: City of San Diego General Plan, March

37 Table 9 Parking Lot Noise Sources 1,2 Level (dba) Source 50 feet 100 feet Autos at 14 mph Sweepers Car Alarm Signal Car Alarm Chirp Car Horns Door Slams Talking Radios Tire Squeals Adapted from: Gordon Bricken & Associates, (as Cited in Trancas Canyon Community Park EIR, 2007). 2 Estimates are based on actual noise measurements taken at various parking lots as measured by Kunzman Associates, Inc 32

38 Table 10 Construction Equipment Vibration Source Levels 1 Peak Partical Velocity in inches per second 2 Equipment at 25 ft. at 50 ft. at 100 ft. Clam Shovel Drop (slurry wall) Vibratory Roller Hoe Ram Large Bulldozer Caisson Drilling Loaded Trucks Jackhammer Small Bulldozer Source: Federal Transit Administration: Transit Noise and Vibration Impact Assessment, Bold values are considered annoying to people. 33

39 Table 11 Typical Human Reaction and Effect on Buildings Due to Groundborne Vibration 1 Vibration Level Peak Particle Velocity (PPV) in/sec Human Reaction Threshold of perception, possibility of intrusion 0.08 in/sec Vibrations readily perceptible 0.10 in/sec 0.20 in/sec in/sec Level at which continuous vibration begins to annoy people Vibrations annoying to people in buildings Vibrations considered unpleasant by people subjected to continuous vibrations and unacceptable to some people walking on bridges Effect on Buildings Vibrations unlikely to cause damage of any type Recommended upper level of vibration to which ruins and ancient monuments should be subjected Virtually no risk of architectural (i.e., not structural) damage to normal buildings Threshold at which there is a risk to architectural damage to normal dwelling houses with plastered walls and ceilings Vibrations at a greater level than normally expected from traffic, but would cause architectural damage and possibly minor structural damage 1 Source: Caltrans,

40 VII. Mitigation Measures A. Construction Mitigation Project developers shall require by contract specifications that the following construction best management practices (BMPs) be implemented by contractors to reduce construction noise levels: 1. Two weeks prior to the commencement of construction, notification must be provided to surrounding land uses disclosing the construction schedule, including the various types of activities that would be occurring throughout the duration of the construction period. For the duration of construction activities, the construction manager shall serve as the contact person should noise levels become disruptive to local residents. A sign shall be posted at the project site with the contact phone number. 2. During construction, schedule high noise producing activities between the hours of 8 AM and 5 PM to minimize disruption on sensitive uses. 3. Prior to and during construction activities, ensure that construction equipment is properly muffled according to industry standards. 4. During construction activities, place noise generating construction equipment and locate construction staging areas away from residences, where feasible. 5. During construction activities, pile driving shall not be permitted in the project area. 6. During construction, the contractor shall implement noise attenuation measures to the extent feasible, which may include, but are not limited to, noise barriers or noise blankets. 7. During contract negotiation, project developers shall require that specifications that show that construction staging areas along with the operation of earthmoving equipment on a project site within the project area will be located as far away from vibrationsensitive sites as possible. Contract specifications shall be included in the project construction documents, which shall be reviewed by the City prior to issuance of a grading permit. 8. Prior to issuance of a grading permit, the developer shall determine whether there are any fragile or extremely fragile structures, including historic as well as non historic structures that may be affected by project grading and construction activities. If fragile or extremely fragile structures are present in the project area, the developer shall assure construction equipment will not approach within 25 feet of the fragile or extremely fragile structures. Further, the developer shall establish a 25 foot buffer zone from construction equipment around the fragile and extremely fragile structures, and shall provide for temporary fencing and private security patrols to prevent human and 35

41 vehicular/equipment access to the structures during construction of the project sites within the project area. B. Building Mitigation 1. Prior to building construction, the project proponent shall demonstrate to the City that all exposed residential exterior wall assembly/window combinations proposed adjacent to Valley Boulevard (facing north), and all west facing wall assembly/window combinations of the proposed four story building will provide exterior to interior noise reduction of 28.1 db. Representative methods that can be utilized to achieve this noise reduction are presented items 1 8 in Table 8. All other exterior residential wall assemblies will need to implement measures similar to items 1 6 listed in Table 8 to achieve at least 20 dba of exterior to interior noise reduction. 2. Prior to building construction, the project proponent shall demonstrate to the City that the proposed office/commercial/retail/restaurant buildings comply with Section of the California Green Building Standards which require wall and roof ceiling assemblies to achieve STC ratings of at least 50 and windows to have a minimum STC rating of 30. The City Building Division will require evidence showing that assembly/wall combinations will be utilized that meet these requirements. B. Operational Mitigation 1. During project operation, prohibit truck access and trash compactor use in and adjacent to the alley located north of Bencamp Street to between the hours of 10:00 PM and 7:00 AM. 36

42 VIII. References Bolt, Beranek & Newman 1987 Noise Control for Buildings and Manufacturing Plants. California, State of 2012 California Environmental Quality Act (CEQA) (Public Resources Code ) and the CEQA Guidelines (California Code of Regulations, Title 14, Division 6, Chapter 3, Sections ) State of California General Plan Guidelines, Appendix C, Guidelines for the Preparation and Content of the Noise Element of the General Plan. October State of California Building Code, Title 24. California Department of Transportation 1995 Use of California Vehicle Noise Reference Energy Mean Emission Levels Transportation Related Earthborne Vibrations (Caltrans Experiences), Technical Advisory, Vibration TAV R9601. February California Department of Transportation (Caltrans). Technical Noise Supplement, November. Daly, Standlee & Associates, Inc Investigation of Garbage Truck Fork Noise Control Treatment Environmental Protection Agency 1974 "Information on Levels of Environmental Noise Requisite to Protect Public Health And Welfare with an Adequate Margin of Safety," EPA/ONAC 550/ , March, Federal Transit Administration 2006 Transit Noise and Vibration Impact Assessment. May Gordon Bricken & Associates 2007 Trancas Canyon Community Park EIR. Harris, Cyril M Handbook of Acoustical Measurement and Noise Control. Acoustical Society of America. Woodbury, N.Y. KOA Corporation, Inc Draft Traffic Impact Study West Valley Boulevard Mixed Use Project San Gabriel, September 8. 37

43 San Diego, City of 2008 City of San Diego General Plan, March. San Gabriel, City of 2004 City of San Gabriel General Plan City of San Gabriel Municipal Code. U.S. Department of Transportation FHWA Roadway Construction Noise Model User s Guide. January. 38

44 Appendices Appendix A Larson Davis Model 820 SLM Output Appendix B RCNM Noise Modeling Output Appendix C FHWA RD Model Output

45 APPENDIX A Larson Davis Model 820 SLM Output

46 Noise Measurement Field Data Project Name: Chateau Mixed Use Project #: 5488 Receiver Name: Larson Davis SoundTrack LxT1 Technician: Eric Torres Date: 8/29/2014 Address: In front of project site. Across from 425 Valley Boulevard Site Description: On sidewalk in front of project location. Approximately 50 feet from Centerline of Valley Boulevard Temperature: approximately 82 o f Settings: SLOW FAST Wind: None Terrain: Flat Weather: Clear and Sunny Primary Source: Heavy Traffic on Valley blvd. During Measurements approximately 582 autos, 15 medium trucks, and 1 heavy truck passed measurement site. Secondary Sources: People walking, talking, and stopping by. Cars idleing, Engines starting. Start Time: 11:26 AM Leq: 66.2 dba Lmax: 99.5 dba L2: 73.8 dba L8: 69.5 dba L25: 67.5 dba L50: 64.7 dba End Time: 11:41 AM Other: Additional Notes/Sketch

47 Summary NM1 Filename LxT_Data.228 Serial Number 3099 Model SoundTrack LxT Firmware Version User Eric Torres Location Valley Blvd approx 50 ft from Centerline Start 29/08/ :26:06 Stop 29/08/ :41:06 Duration 0:15:00.0 Run Time 0:15:00.0 Pause 0:00:00.0 Pre Calibration 29/08/ :22:22 Post Calibration None Calibration Deviation Overall Settings RMS Weight Peak Weight Detector Preamp Integration Method Overload A Weighting C Weighting Slow PRMLxT1L Exponential 0.0 db Results LASeq 66.2 db LASE 95.7 db EAS µpa²h EAS mpa²h EAS mpa²h LCpeak (max) 29/08/ :40: db LASmax 29/08/ :26: db LASmin 29/08/ :36: db SEA 99.9 db LCSeq 75.5 db Statistics LASeq 66.2 db LAS db LCSeq LASeq 9.3 db LAS db LAIeq 67.7 db LAS db LAeq 66.2 db LAS db LAIeq LAeq 1.5 db LAS db # Overloads 0 LAS db Overload Duration 0.0 s

48 Noise Measurement Field Data Project Name: Chateau Mixed Use Project #: 5488 Receiver Name: Larson Davis SoundTrack LxT1 Technician: Eric Torres Date: 8/29/2014 Address: 413 W. Bencamp St Site Description: In alley next to 413 W. Bencamp St. Alley is lined with approximately 6 ft high cinder block walls Temperature: approximately 82 o f Settings: SLOW FAST Wind: None Terrain: Flat Weather: Clear and Sunny Primary Source: Light Traffic on Bencamp St, and in the alley. Secondary Sources: Dog Barking, some traffic noise from Valley blvd Start Time: 11:51 AM Leq: 53.6 dba Lmax: 87.8 dba L2: 61.8 dba L8: 55.1 dba L25: 53.6 dba L50: 53.0 dba End Time: 12:06 PM Other: Additional Notes/Sketch

49 Summary NM2 Filename LxT_Data.229 Serial Number 3099 Model SoundTrack LxT Firmware Version User Eric Torres Location xt to 413 W Bencamp St Start 29/08/ :51:35 Stop 29/08/ :06:35 Duration 0:15:00.0 Run Time 0:15:00.0 Pause 0:00:00.0 Pre Calibration 29/08/ :22:19 Post Calibration None Calibration Deviation Overall Settings RMS Weight Peak Weight Detector Preamp Integration Method Overload A Weighting C Weighting Slow PRMLxT1L Exponential 0.0 db Results LASeq 53.6 db LASE 83.1 db EAS µpa²h EAS µpa²h EAS mpa²h LCpeak (max) 29/08/ :00: db LASmax 29/08/ :05: db LASmin 29/08/ :56: db SEA 99.9 db LCSeq 64.5 db Statistics LASeq 53.6 db LAS db LCSeq LASeq 11.0 db LAS db LAIeq 55.2 db LAS db LAeq 53.6 db LAS db LAIeq LAeq 1.7 db LAS db # Overloads 0 LAS db Overload Duration 0.0 s

50 Noise Measurement Field Data Project Name: Chateau Mixed Use Project #: 5488 Receiver Name: Larson Davis SoundTrack LxT1 Technician: Eric Torres Date: 8/29/2014 Address: 532 W. Valley blvd. Site Description: In parking space in bank parking lot. Next to neighboring buiding. Approx 50 ft from centerline. Temperature: approximately 84 o f Settings: SLOW FAST Wind: None Terrain: Flat Weather: Clear and Sunny Primary Source: Heavy Traffic on New Ave. During Measurements approximately 384 autos, 10 medium trucks, and 5 heavy truck passed measurement site. Secondary Sources: People walking, talking, and stopping by. Cars idleing, Engines starting. Car horn about 12:16pm Start Time: 12:11 PM Leq: 63.9 dba Lmax: 99.1 dba L2: 71.2 dba L8: 67.0 dba L25: 64.5 dba L50: 62.0 dba End Time: 12:26 PM Other: Additional Notes/Sketch

51 Summary NM3 Filename LxT_Data.230 Serial Number 3099 Model SoundTrack LxT Firmware Version User Eric Torres Location New Ave approx 50 ft from centerline Start 29/08/ :11:45 Stop 29/08/ :26:45 Duration 0:15:00.0 Run Time 0:15:00.0 Pause 0:00:00.0 Pre Calibration 29/08/ :22:19 Post Calibration None Calibration Deviation Overall Settings RMS Weight Peak Weight Detector Preamp Integration Method Overload A Weighting C Weighting Slow PRMLxT1L Exponential 0.0 db Results LASeq 63.9 db LASE 93.4 db EAS µpa²h EAS mpa²h EAS mpa²h LCpeak (max) 29/08/ :26: db LASmax 29/08/ :26: db LASmin 29/08/ :18: db SEA 99.9 db LCSeq 83.6 db Statistics LASeq 63.9 db LAS1.00 LCSeq LASeq 19.7 db LAS8.33 LAIeq 65.5 db LAS25.00 LAeq 63.9 db LAS50.00 LAIeq LAeq 1.6 db LAS66.67 # Overloads 0 LAS90.00 Overload Duration 0.0 s

52 71.2 db 67.0 db 64.5 db 62.0 db 60.6 db 58.6 db

53 APPENDIX B RCNM Noise Modeling Output

54 Roadway Construction Noise Model (RCNM),Version 1.1 Report date: 9/17/2014 Case Description: W Valley Receptor #1 Baselines (dba) Description Land Use Daytime Evening Night Residential Residential Equipment Spec Actual Receptor Estimated Impact Lmax Lmax Distance Shielding Description Device Usage(%) (dba) (dba) (feet) (dba) Backhoe No Dozer No Dump Truck No Calculated (dba) Equipment *Lmax Leq Backhoe Dozer Dump Truck Total *Calculated Lmax is the Loudest value.

55 APPENDIX C FHWA RD Model Output

56 FHWA Sound32 Spreadsheet Existing Traffic Noise Project: Chateau Road: New Ave Segment: North of Ramona DAYTIME EVENING NIGHTTIME ADT AUTOS M.TRUCKS H.TRUCKS AUTOS M.TRUCKS H.TRUCKS AUTOS M.TRUCKS H.TRUCKS SPEED DISTANCE INPUT PARAMETERS Vehicles per hour % A 92 Speed in MPH Left angle Right angle % MT 3 NOISE CALCULATIONS Reference levels % HT 5 ADJUSTMENTS Flow Distance LEFT Finite Roadway RIGHT Barrier Grade CNEL Constant DAY LEQ LEQ Day hour Absorbtive? no DAY LEQ EVENING LEQ NIGHT LEQ Use hour? no GRADE db 0.00 CNEL 66.73

57 FHWA Sound32 Spreadsheet Existing Plus Project Traffic Noise Project: Chateau Road: New Ave Segment: North of Ramona DAYTIME EVENING NIGHTTIME ADT AUTOS M.TRUCKS H.TRUCKS AUTOS M.TRUCKS H.TRUCKS AUTOS M.TRUCKS H.TRUCKS SPEED DISTANCE INPUT PARAMETERS Vehicles per hour % A Speed in MPH Left angle Right angle % MT 3.00 NOISE CALCULATIONS Reference levels % HT 4.92 ADJUSTMENTS Flow Distance LEFT Finite Roadway RIGHT Barrier Grade CNEL Constant DAY LEQ LEQ Day hour Absorbtive? no DAY LEQ EVENING LEQ NIGHT LEQ Use hour? no GRADE db 0.00 CNEL 66.80

58 FHWA Sound32 Spreadsheet Existing Traffic Noise Project: Chateau Road: New Ave Segment: Ramona st to Valley blvd DAYTIME EVENING NIGHTTIME ADT AUTOS M.TRUCKS H.TRUCKS AUTOS M.TRUCKS H.TRUCKS AUTOS M.TRUCKS H.TRUCKS SPEED DISTANCE INPUT PARAMETERS Vehicles per hour % A 92 Speed in MPH Left angle Right angle % MT 3 NOISE CALCULATIONS Reference levels % HT 5 ADJUSTMENTS Flow Distance LEFT Finite Roadway RIGHT Barrier Grade CNEL Constant DAY LEQ LEQ Day hour Absorbtive? no DAY LEQ EVENING LEQ NIGHT LEQ Use hour? no GRADE db 0.00 CNEL 68.19

59 FHWA Sound32 Spreadsheet Existing Plus Project Traffic Noise Project: Chateau Road: New Ave Segment: Ramona st to Valley blvd DAYTIME EVENING NIGHTTIME ADT AUTOS M.TRUCKS H.TRUCKS AUTOS M.TRUCKS H.TRUCKS AUTOS M.TRUCKS H.TRUCKS SPEED DISTANCE INPUT PARAMETERS Vehicles per hour % A Speed in MPH Left angle Right angle % MT 3.00 NOISE CALCULATIONS Reference levels % HT 4.94 ADJUSTMENTS Flow Distance LEFT Finite Roadway RIGHT Barrier Grade CNEL Constant DAY LEQ LEQ Day hour Absorbtive? no DAY LEQ EVENING LEQ NIGHT LEQ Use hour? no GRADE db 0.00 CNEL 68.24

60 FHWA Sound32 Spreadsheet Existing Traffic Noise Project: Chateau Road: New Ave Segment: Valley blvd to Bencamp st DAYTIME EVENING NIGHTTIME ADT AUTOS M.TRUCKS H.TRUCKS AUTOS M.TRUCKS H.TRUCKS AUTOS M.TRUCKS H.TRUCKS SPEED DISTANCE INPUT PARAMETERS Vehicles per hour % A 92 Speed in MPH Left angle Right angle % MT 3 NOISE CALCULATIONS Reference levels % HT 5 ADJUSTMENTS Flow Distance LEFT Finite Roadway RIGHT Barrier Grade CNEL Constant DAY LEQ LEQ Day hour Absorbtive? no DAY LEQ EVENING LEQ NIGHT LEQ Use hour? no GRADE db 0.00 CNEL 70.62

61 FHWA Sound32 Spreadsheet Existing Plus Project Traffic Noise Project: Chateau Road: New Ave Segment: Valley blvd to Bencamp st DAYTIME EVENING NIGHTTIME ADT AUTOS M.TRUCKS H.TRUCKS AUTOS M.TRUCKS H.TRUCKS AUTOS M.TRUCKS H.TRUCKS SPEED DISTANCE INPUT PARAMETERS Vehicles per hour % A Speed in MPH Left angle Right angle % MT 3.00 NOISE CALCULATIONS Reference levels % HT 4.92 ADJUSTMENTS Flow Distance LEFT Finite Roadway RIGHT Barrier Grade CNEL Constant DAY LEQ LEQ Day hour Absorbtive? no DAY LEQ EVENING LEQ NIGHT LEQ Use hour? no GRADE db 0.00 CNEL 70.69

62 FHWA Sound32 Spreadsheet Existing Traffic Noise Project: Chateau Road: New Ave Segment: Bencamp st to Norwood Pl DAYTIME EVENING NIGHTTIME ADT AUTOS M.TRUCKS H.TRUCKS AUTOS M.TRUCKS H.TRUCKS AUTOS M.TRUCKS H.TRUCKS SPEED DISTANCE INPUT PARAMETERS Vehicles per hour % A 92 Speed in MPH Left angle Right angle % MT 3 NOISE CALCULATIONS Reference levels % HT 5 ADJUSTMENTS Flow Distance LEFT Finite Roadway RIGHT Barrier Grade CNEL Constant DAY LEQ LEQ Day hour Absorbtive? no DAY LEQ EVENING LEQ NIGHT LEQ Use hour? no GRADE db 0.00 CNEL 70.93

63 FHWA Sound32 Spreadsheet Existing Plus Project Traffic Noise Project: Chateau Road: New Ave Segment: Bencamp st to Norwood Pl DAYTIME EVENING NIGHTTIME ADT AUTOS M.TRUCKS H.TRUCKS AUTOS M.TRUCKS H.TRUCKS AUTOS M.TRUCKS H.TRUCKS SPEED DISTANCE INPUT PARAMETERS Vehicles per hour % A Speed in MPH Left angle Right angle % MT 3.00 NOISE CALCULATIONS Reference levels % HT 4.93 ADJUSTMENTS Flow Distance LEFT Finite Roadway RIGHT Barrier Grade CNEL Constant DAY LEQ LEQ Day hour Absorbtive? no DAY LEQ EVENING LEQ NIGHT LEQ Use hour? no GRADE db 0.00 CNEL 70.99

64 FHWA Sound32 Spreadsheet Existing Traffic Noise Project: Chateau Road: New Ave Segment: Norwood Pl to Saxon ave DAYTIME EVENING NIGHTTIME ADT AUTOS M.TRUCKS H.TRUCKS AUTOS M.TRUCKS H.TRUCKS AUTOS M.TRUCKS H.TRUCKS SPEED DISTANCE INPUT PARAMETERS Vehicles per hour % A 92 Speed in MPH Left angle Right angle % MT 3 NOISE CALCULATIONS Reference levels % HT 5 ADJUSTMENTS Flow Distance LEFT Finite Roadway RIGHT Barrier Grade CNEL Constant DAY LEQ LEQ Day hour Absorbtive? no DAY LEQ EVENING LEQ NIGHT LEQ Use hour? no GRADE db 0.00 CNEL 71.14

65 FHWA Sound32 Spreadsheet Existing Plus Project Traffic Noise Project: Chateau Road: New Ave Segment: Norwood Pl to Saxon ave DAYTIME EVENING NIGHTTIME ADT AUTOS M.TRUCKS H.TRUCKS AUTOS M.TRUCKS H.TRUCKS AUTOS M.TRUCKS H.TRUCKS SPEED DISTANCE INPUT PARAMETERS Vehicles per hour % A Speed in MPH Left angle Right angle % MT 3.00 NOISE CALCULATIONS Reference levels % HT 4.93 ADJUSTMENTS Flow Distance LEFT Finite Roadway RIGHT Barrier Grade CNEL Constant DAY LEQ LEQ Day hour Absorbtive? no DAY LEQ EVENING LEQ NIGHT LEQ Use hour? no GRADE db 0.00 CNEL 71.20

66 FHWA Sound32 Spreadsheet Existing Traffic Noise Project: Chateau Road: New Ave Segment: South of Saxon ave DAYTIME EVENING NIGHTTIME ADT AUTOS M.TRUCKS H.TRUCKS AUTOS M.TRUCKS H.TRUCKS AUTOS M.TRUCKS H.TRUCKS SPEED DISTANCE INPUT PARAMETERS Vehicles per hour % A 92 Speed in MPH Left angle Right angle % MT 3 NOISE CALCULATIONS Reference levels % HT 5 ADJUSTMENTS Flow Distance LEFT Finite Roadway RIGHT Barrier Grade CNEL Constant DAY LEQ LEQ Day hour Absorbtive? no DAY LEQ EVENING LEQ NIGHT LEQ Use hour? no GRADE db 0.00 CNEL 70.14

67 FHWA Sound32 Spreadsheet Existing Plus Project Traffic Noise Project: Chateau Road: New Ave Segment: South of Saxon ave DAYTIME EVENING NIGHTTIME ADT AUTOS M.TRUCKS H.TRUCKS AUTOS M.TRUCKS H.TRUCKS AUTOS M.TRUCKS H.TRUCKS SPEED DISTANCE INPUT PARAMETERS Vehicles per hour % A Speed in MPH Left angle Right angle % MT 3.00 NOISE CALCULATIONS Reference levels % HT 4.94 ADJUSTMENTS Flow Distance LEFT Finite Roadway RIGHT Barrier Grade CNEL Constant DAY LEQ LEQ Day hour Absorbtive? no DAY LEQ EVENING LEQ NIGHT LEQ Use hour? no GRADE db 0.00 CNEL 70.20

68 FHWA Sound32 Spreadsheet Existing Traffic Noise Project: 5844 Chateau Road: Prospect Avenue Segment: North of Valley Blvd DAYTIME EVENING NIGHTTIME ADT AUTOS M.TRUCKS H.TRUCKS AUTOS M.TRUCKS H.TRUCKS AUTOS M.TRUCKS H.TRUCKS SPEED DISTANCE INPUT PARAMETERS Vehicles per hour % A 97.4 Speed in MPH Left angle Right angle % MT 1.84 NOISE CALCULATIONS Reference levels % HT 0.74 ADJUSTMENTS Flow Distance LEFT Finite Roadway RIGHT Barrier Grade CNEL Constant DAY LEQ LEQ Day hour Absorbtive? no DAY LEQ EVENING LEQ NIGHT LEQ Use hour? no GRADE db 0.00 CNEL 52.63

69 FHWA Sound32 Spreadsheet Existing Plus Project Traffic Noise Project: 5844 Chateau Road: Prospect Avenue Segment: North of Valley Blvd DAYTIME EVENING NIGHTTIME ADT AUTOS M.TRUCKS H.TRUCKS AUTOS M.TRUCKS H.TRUCKS AUTOS M.TRUCKS H.TRUCKS SPEED DISTANCE INPUT PARAMETERS Vehicles per hour % A Speed in MPH Left angle Right angle % MT 1.90 NOISE CALCULATIONS Reference levels % HT 0.80 ADJUSTMENTS Flow Distance LEFT Finite Roadway RIGHT Barrier Grade CNEL Constant DAY LEQ LEQ Day hour Absorbtive? no DAY LEQ EVENING LEQ NIGHT LEQ Use hour? no GRADE db 0.00 CNEL 53.03

70 FHWA Sound32 Spreadsheet Existing Traffic Noise Project: Chateau Road: Del Mar Ave Segment: North of East Wells st DAYTIME EVENING NIGHTTIME ADT AUTOS M.TRUCKS H.TRUCKS AUTOS M.TRUCKS H.TRUCKS AUTOS M.TRUCKS H.TRUCKS SPEED DISTANCE INPUT PARAMETERS Vehicles per hour % A 92 Speed in MPH Left angle Right angle % MT 3 NOISE CALCULATIONS Reference levels % HT 5 ADJUSTMENTS Flow Distance LEFT Finite Roadway RIGHT Barrier Grade CNEL Constant DAY LEQ LEQ Day hour Absorbtive? no DAY LEQ EVENING LEQ NIGHT LEQ Use hour? no GRADE db 0.00 CNEL 69.51

71 FHWA Sound32 Spreadsheet Existing Plus Project Traffic Noise Project: Chateau Road: Del Mar Ave Segment: North of East Wells st DAYTIME EVENING NIGHTTIME ADT AUTOS M.TRUCKS H.TRUCKS AUTOS M.TRUCKS H.TRUCKS AUTOS M.TRUCKS H.TRUCKS SPEED DISTANCE INPUT PARAMETERS Vehicles per hour % A Speed in MPH Left angle Right angle % MT 3.00 NOISE CALCULATIONS Reference levels % HT 4.98 ADJUSTMENTS Flow Distance LEFT Finite Roadway RIGHT Barrier Grade CNEL Constant DAY LEQ LEQ Day hour Absorbtive? no DAY LEQ EVENING LEQ NIGHT LEQ Use hour? no GRADE db 0.00 CNEL 69.52

72 FHWA Sound32 Spreadsheet Existing Traffic Noise Project: Chateau Road: Del Mar Ave Segment: E. Wells st to Valley blvd DAYTIME EVENING NIGHTTIME ADT AUTOS M.TRUCKS H.TRUCKS AUTOS M.TRUCKS H.TRUCKS AUTOS M.TRUCKS H.TRUCKS SPEED DISTANCE INPUT PARAMETERS Vehicles per hour % A 92 Speed in MPH Left angle Right angle % MT 3 NOISE CALCULATIONS Reference levels % HT 5 ADJUSTMENTS Flow Distance LEFT Finite Roadway RIGHT Barrier Grade CNEL Constant DAY LEQ LEQ Day hour Absorbtive? no DAY LEQ EVENING LEQ NIGHT LEQ Use hour? no GRADE db 0.00 CNEL 69.46

73 FHWA Sound32 Spreadsheet Existing Plus Project Traffic Noise Project: Chateau Road: Del Mar Ave Segment: E. Wells st to Valley blvd DAYTIME EVENING NIGHTTIME ADT AUTOS M.TRUCKS H.TRUCKS AUTOS M.TRUCKS H.TRUCKS AUTOS M.TRUCKS H.TRUCKS SPEED DISTANCE INPUT PARAMETERS Vehicles per hour % A Speed in MPH Left angle Right angle % MT 3.00 NOISE CALCULATIONS Reference levels % HT 4.98 ADJUSTMENTS Flow Distance LEFT Finite Roadway RIGHT Barrier Grade CNEL Constant DAY LEQ LEQ Day hour Absorbtive? no DAY LEQ EVENING LEQ NIGHT LEQ Use hour? no GRADE db 0.00 CNEL 69.47

74 FHWA Sound32 Spreadsheet Existing Traffic Noise Project: Chateau Road: Del Mar Ave Segment: South of Valley blvd DAYTIME EVENING NIGHTTIME ADT AUTOS M.TRUCKS H.TRUCKS AUTOS M.TRUCKS H.TRUCKS AUTOS M.TRUCKS H.TRUCKS SPEED DISTANCE INPUT PARAMETERS Vehicles per hour % A 92 Speed in MPH Left angle Right angle % MT 3 NOISE CALCULATIONS Reference levels % HT 5 ADJUSTMENTS Flow Distance LEFT Finite Roadway RIGHT Barrier Grade CNEL Constant DAY LEQ LEQ Day hour Absorbtive? no DAY LEQ EVENING LEQ NIGHT LEQ Use hour? no GRADE db 0.00 CNEL 68.72

75 FHWA Sound32 Spreadsheet Existing Plus Project Traffic Noise Project: Chateau Road: Del Mar Ave Segment: South of Valley blvd DAYTIME EVENING NIGHTTIME ADT AUTOS M.TRUCKS H.TRUCKS AUTOS M.TRUCKS H.TRUCKS AUTOS M.TRUCKS H.TRUCKS SPEED DISTANCE INPUT PARAMETERS Vehicles per hour % A Speed in MPH Left angle Right angle % MT 3.00 NOISE CALCULATIONS Reference levels % HT 4.95 ADJUSTMENTS Flow Distance LEFT Finite Roadway RIGHT Barrier Grade CNEL Constant DAY LEQ LEQ Day hour Absorbtive? no DAY LEQ EVENING LEQ NIGHT LEQ Use hour? no GRADE db 0.00 CNEL 68.77

76 FHWA Sound32 Spreadsheet Existing Traffic Noise Project: Chateau Road: Valley Boulevard Segment: West of New Ave DAYTIME EVENING NIGHTTIME ADT AUTOS M.TRUCKS H.TRUCKS AUTOS M.TRUCKS H.TRUCKS AUTOS M.TRUCKS H.TRUCKS SPEED DISTANCE INPUT PARAMETERS Vehicles per hour % A 92 Speed in MPH Left angle Right angle % MT 3 NOISE CALCULATIONS Reference levels % HT 5 ADJUSTMENTS Flow Distance LEFT Finite Roadway RIGHT Barrier Grade CNEL Constant DAY LEQ LEQ Day hour Absorbtive? no DAY LEQ EVENING LEQ NIGHT LEQ Use hour? no GRADE db 0.00 CNEL 71.12

77 FHWA Sound32 Spreadsheet Existing Plus Project Traffic Noise Project: Chateau Road: Valley Boulevard Segment: West of New Ave DAYTIME EVENING NIGHTTIME ADT AUTOS M.TRUCKS H.TRUCKS AUTOS M.TRUCKS H.TRUCKS AUTOS M.TRUCKS H.TRUCKS SPEED DISTANCE INPUT PARAMETERS Vehicles per hour % A Speed in MPH Left angle Right angle % MT 3.00 NOISE CALCULATIONS Reference levels % HT 4.96 ADJUSTMENTS Flow Distance LEFT Finite Roadway RIGHT Barrier Grade CNEL Constant DAY LEQ LEQ Day hour Absorbtive? no DAY LEQ EVENING LEQ NIGHT LEQ Use hour? no GRADE db 0.00 CNEL 71.15

78 FHWA Sound32 Spreadsheet Existing Traffic Noise Project: Chateau Road: Valley Boulevard Segment: New Ave to Prospect Ave DAYTIME EVENING NIGHTTIME ADT AUTOS M.TRUCKS H.TRUCKS AUTOS M.TRUCKS H.TRUCKS AUTOS M.TRUCKS H.TRUCKS SPEED DISTANCE INPUT PARAMETERS Vehicles per hour % A 92 Speed in MPH Left angle Right angle % MT 3 NOISE CALCULATIONS Reference levels % HT 5 ADJUSTMENTS Flow Distance LEFT Finite Roadway RIGHT Barrier Grade CNEL Constant DAY LEQ LEQ Day hour Absorbtive? no DAY LEQ EVENING LEQ NIGHT LEQ Use hour? no GRADE db 0.00 CNEL 71.12

79 FHWA Sound32 Spreadsheet Existing Plus Project Traffic Noise Project: Chateau Road: Valley Boulevard Segment: New Ave to Prospect Ave DAYTIME EVENING NIGHTTIME ADT AUTOS M.TRUCKS H.TRUCKS AUTOS M.TRUCKS H.TRUCKS AUTOS M.TRUCKS H.TRUCKS SPEED DISTANCE INPUT PARAMETERS Vehicles per hour % A Speed in MPH Left angle Right angle % MT 3.00 NOISE CALCULATIONS Reference levels % HT 4.88 ADJUSTMENTS Flow Distance LEFT Finite Roadway RIGHT Barrier Grade CNEL Constant DAY LEQ LEQ Day hour Absorbtive? no DAY LEQ EVENING LEQ NIGHT LEQ Use hour? no GRADE db 0.00 CNEL 71.22

80 FHWA Sound32 Spreadsheet Existing Traffic Noise Project: Chateau Road: Valley Boulevard Segment: Prospect Ave to Abbot Ave DAYTIME EVENING NIGHTTIME ADT AUTOS M.TRUCKS H.TRUCKS AUTOS M.TRUCKS H.TRUCKS AUTOS M.TRUCKS H.TRUCKS SPEED DISTANCE INPUT PARAMETERS Vehicles per hour % A 92 Speed in MPH Left angle Right angle % MT 3 NOISE CALCULATIONS Reference levels % HT 5 ADJUSTMENTS Flow Distance LEFT Finite Roadway RIGHT Barrier Grade CNEL Constant DAY LEQ LEQ Day hour Absorbtive? no DAY LEQ EVENING LEQ NIGHT LEQ Use hour? no GRADE db 0.00 CNEL 71.26

81 FHWA Sound32 Spreadsheet Existing Plus Project Traffic Noise Project: Chateau Road: Valley Boulevard Segment: Prospect Ave to Abbot Ave DAYTIME EVENING NIGHTTIME ADT AUTOS M.TRUCKS H.TRUCKS AUTOS M.TRUCKS H.TRUCKS AUTOS M.TRUCKS H.TRUCKS SPEED DISTANCE INPUT PARAMETERS Vehicles per hour % A Speed in MPH Left angle Right angle % MT 3.00 NOISE CALCULATIONS Reference levels % HT 4.89 ADJUSTMENTS Flow Distance LEFT Finite Roadway RIGHT Barrier Grade CNEL Constant DAY LEQ LEQ Day hour Absorbtive? no DAY LEQ EVENING LEQ NIGHT LEQ Use hour? no GRADE db 0.00 CNEL 71.36

82 FHWA Sound32 Spreadsheet Existing Traffic Noise Project: Chateau Road: Valley Boulevard Segment: Abbot Ave to Del Mar Ave DAYTIME EVENING NIGHTTIME ADT AUTOS M.TRUCKS H.TRUCKS AUTOS M.TRUCKS H.TRUCKS AUTOS M.TRUCKS H.TRUCKS SPEED DISTANCE INPUT PARAMETERS Vehicles per hour % A 92 Speed in MPH Left angle Right angle % MT 3 NOISE CALCULATIONS Reference levels % HT 5 ADJUSTMENTS Flow Distance LEFT Finite Roadway RIGHT Barrier Grade CNEL Constant DAY LEQ LEQ Day hour Absorbtive? no DAY LEQ EVENING LEQ NIGHT LEQ Use hour? no GRADE db 0.00 CNEL 71.28

83 FHWA Sound32 Spreadsheet Existing Plus Project Traffic Noise Project: Chateau Road: Valley Boulevard Segment: Abbot Ave to Del Mar Ave DAYTIME EVENING NIGHTTIME ADT AUTOS M.TRUCKS H.TRUCKS AUTOS M.TRUCKS H.TRUCKS AUTOS M.TRUCKS H.TRUCKS SPEED DISTANCE INPUT PARAMETERS Vehicles per hour % A Speed in MPH Left angle Right angle % MT 3.00 NOISE CALCULATIONS Reference levels % HT 4.93 ADJUSTMENTS Flow Distance LEFT Finite Roadway RIGHT Barrier Grade CNEL Constant DAY LEQ LEQ Day hour Absorbtive? no DAY LEQ EVENING LEQ NIGHT LEQ Use hour? no GRADE db 0.00 CNEL 71.34

84 FHWA Sound32 Spreadsheet Existing Traffic Noise Project: Chateau Road: Valley Boulevard Segment: East of Del Mar Ave DAYTIME EVENING NIGHTTIME ADT AUTOS M.TRUCKS H.TRUCKS AUTOS M.TRUCKS H.TRUCKS AUTOS M.TRUCKS H.TRUCKS SPEED DISTANCE INPUT PARAMETERS Vehicles per hour % A 92 Speed in MPH Left angle Right angle % MT 3 NOISE CALCULATIONS Reference levels % HT 5 ADJUSTMENTS Flow Distance LEFT Finite Roadway RIGHT Barrier Grade CNEL Constant DAY LEQ LEQ Day hour Absorbtive? no DAY LEQ EVENING LEQ NIGHT LEQ Use hour? no GRADE db 0.00 CNEL 70.76

85 FHWA Sound32 Spreadsheet Existing Plus Project Traffic Noise Project: Chateau Road: Valley Boulevard Segment: East of Del Mar Ave DAYTIME EVENING NIGHTTIME ADT AUTOS M.TRUCKS H.TRUCKS AUTOS M.TRUCKS H.TRUCKS AUTOS M.TRUCKS H.TRUCKS SPEED DISTANCE INPUT PARAMETERS Vehicles per hour % A Speed in MPH Left angle Right angle % MT 3.00 NOISE CALCULATIONS Reference levels % HT 4.95 ADJUSTMENTS Flow Distance LEFT Finite Roadway RIGHT Barrier Grade CNEL Constant DAY LEQ LEQ Day hour Absorbtive? no DAY LEQ EVENING LEQ NIGHT LEQ Use hour? no GRADE db 0.00 CNEL 70.80

86 FHWA Sound32 Spreadsheet Existing Traffic Noise Project: 5844 Chateau Road: Bencamp Segment: East of New Ave DAYTIME EVENING NIGHTTIME ADT AUTOS M.TRUCKS H.TRUCKS AUTOS M.TRUCKS H.TRUCKS AUTOS M.TRUCKS H.TRUCKS SPEED DISTANCE INPUT PARAMETERS Vehicles per hour % A 97.4 Speed in MPH Left angle Right angle % MT 1.84 NOISE CALCULATIONS Reference levels % HT 0.74 ADJUSTMENTS Flow Distance LEFT Finite Roadway RIGHT Barrier Grade CNEL Constant DAY LEQ LEQ Day hour Absorbtive? no DAY LEQ EVENING LEQ NIGHT LEQ Use hour? no GRADE db 0.00 CNEL 49.39

87 FHWA Sound32 Spreadsheet Existing Plus Project Traffic Noise Project: 5844 Chateau Road: Bencamp Segment: East of New Ave DAYTIME EVENING NIGHTTIME ADT AUTOS M.TRUCKS H.TRUCKS AUTOS M.TRUCKS H.TRUCKS AUTOS M.TRUCKS H.TRUCKS SPEED DISTANCE INPUT PARAMETERS Vehicles per hour % A Speed in MPH Left angle Right angle % MT 1.96 NOISE CALCULATIONS Reference levels % HT 0.87 ADJUSTMENTS Flow Distance LEFT Finite Roadway RIGHT Barrier Grade CNEL Constant DAY LEQ LEQ Day hour Absorbtive? no DAY LEQ EVENING LEQ NIGHT LEQ Use hour? no GRADE db 0.00 CNEL 50.19

88 1111 Town & Country Road, Suite 34 Orange, California (714)