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j.c. brennan & associates, Inc. Job # 2014-188

Environmental Noise Analysis City Hall Relocation & Medical Building – City of Citrus Heights, California

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TABLE OF CONTENTS INTRODUCTION.......................................................................................................................1 PROJECT DESCRIPTION........................................................................................................1

City Hall and Utility Yard (Stock Site)....................................................................................1 Medical Office Building (Fountain Square Site) ....................................................................3 Background Information on Noise and Vibration...................................................................5

Fundamentals of Acoustics ...............................................................................................5 Effects of Noise on People................................................................................................7

EXISTING CONDITIONS..........................................................................................................8 Existing Noise Receptors ..................................................................................................8 Existing Ambient Noise Levels..........................................................................................8 Existing Roadway Noise Levels ......................................................................................10

REGULATORY CONTEXT.....................................................................................................12 Federal ................................................................................................................................12 State....................................................................................................................................13 Local....................................................................................................................................15

City of Citrus Heights General Plan: ...............................................................................15 City of Citrus Heights Noise Ordinance (Zoning Code Chapter 34, Article III ): ..............17

Criteria for Acceptable Vibration .........................................................................................19 IMPACTS AND MITIGATION MEASURES............................................................................21

Thresholds of Significance ..................................................................................................21 Impact 1 Construction noise and vibration at sensitive receptors ..................................22 Construction Vibration.........................................................................................................24 Impact 2 Traffic Noise at Sensitive Receptors ...............................................................26 Impact 3 Project Generated Noise at Sensitive Receptors adjacent to the City Hall and Utility Yard (Stock Site) .......................................................................................................30 Impact 4 Project Generated Noise at Sensitive Receptors adjacent to the Medical Office Building (Fountain Square Site) ..........................................................................................39 Impact 5 Cumulative Noise ............................................................................................42



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List of Tables Table 1: Typical Noise Levels .......................................................................................................6 Table 2: Summary of Existing Background Noise Measurement Data .........................................9 Table 3: Existing Noise Levels and Distances to Contours ........................................................11 Table 4: Summary of Noise Levels Identified as Requisite to Protect the Public Health ............12 Table 5: Hourly Noise Level Performance Standards for Stationary Noise Sources ..................17 Table 6: Effects of Various Vibration Levels on Buildings...........................................................19 Table 7: Significance of Changes in Noise Exposure .................................................................20 Table 8: Construction Equipment Noise .....................................................................................23 Table 9: Vibration Levels for Varying Construction Equipment...................................................24 Table 10: Predicted Traffic Noise Levels and Project-Related Traffic Noise Level Increases (Existing vs. Existing Plus Project)..............................................................................................27 Table 11: Predicted Traffic Noise Levels and Project-Related Traffic Noise Level Increases (Cumulative Existing Zoning vs. Cumulative Plus Project) .........................................................28 Table 12: Predicted Traffic Noise Levels and Project-Related Traffic Noise Level Increases (Cumulative No Development vs. Cumulative Plus Project) .......................................................29 Table 13: Project Noise Source Sound Power Levels – City Hall Site........................................33 Table 14: Project Noise Source Sound Power Levels – Medical Office Building Site.................40

List of Figures Figure 1 – City Hall and Corporation Yard Site Plan.....................................................................2 Figure 2 – Medical Office Building Site Plan.................................................................................4 Figure 3 – State of California Community Noise Exposure Guidelines.......................................14 Figure 4 – “Acceptable Noise Levels” City of Citrus Heights General Plan Noise Element ........16 Figure 5 –Noise Contours for Daily Operations (City Hall and Utility Yard) ................................36 Figure 6 –Noise Contours for Special Events – without amplified sound....................................37 Figure 7 –Noise Contours for Special Events – with amplified sound ........................................38 Figure 8 – Noise Contours for Medical Office Building Operations.............................................41

List of Appendices A Acoustical Terminology B Ambient Noise Monitoring Results C Traffic Noise Modeling Results



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NOISE/VIBRATION

INTRODUCTION

This section describes the existing noise environment in the areas of the proposed Citrus Heights City Hall Relocation project located southeast of the intersection at Fountain Square Drive and Stock Ranch Road and the construction of a 3-Story Medical Office Building at the northwest corner of the Greenback Lane and Fountain Square Drive intersection in the City of Citrus Heights, in Sacramento County. This Environmental Noise Analysis evaluates the potential of the Proposed Projects to generate noise and vibration levels exceeding applicable standards. The analysis focuses on off-site traffic noise, on-site activities, and project construction noise and vibration.

PROJECT DESCRIPTION

City Hall and Utility Yard (Stock Site)

The one-story City Hall building would consist of approximately 35,000 square feet of office and community space and approximately 170 surface parking spaces. The proposed site plan is provided in Figure 1. The building would be constructed to meet LEED Gold certification requirements, but is not proposed to be certified. The building would be situated generally in the southwest portion of the site behind the Post Office, with parking on three sides of the building. Access would be provided from two driveways on Fountain Square Drive. The Utility Yard is proposed to be located adjacent to and east of the City Hall building and parking lot. The Utility Yard would be a 1.5 acre area supporting a 4,000 square foot building, a 5,000 square foot screened outdoor storage area, and secured parking for City vehicles. Equipment stored onsite would include items like a chipper, water tank trailer, necessary tools and accessories needed for emergency situations, street signs and street light materials. A maximum of 4 unassigned workstations would be provided in the building so that field staff have the ability to complete reports as necessary. No public access to the Utility Yard would be provided. City staff access would be provided from a gated connection to the City Hall parking lot. The proposed facility would serve as the City Hall and the City Council Chambers and would provide space for public meeting rooms. With a full time staff of approximately 65 people, the following City departments and services would be located at the new City Hall: General Services Department, City Manager, Community and Economic Development Department, Information Technology, Finance, Human Resources, the City Clerk, and Records Storage.

Figure Prepared November 2014

Citrus Heights City Hall RelocationFigure : Project Site and Noise Monitoring Location

Legend

: Noise Monitoring Location

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DCorporation Yard

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Stock R

anch Road

New City Hall

Public Patio



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The public portion of the proposed new City Hall is approximately 8,933 square feet while the staff area is approximately 26,067 square feet. Daily business hours at the building would be Monday through Friday 8 a.m. to 5 p.m. There would also be evening meetings including community meetings, Residents Empowerment Association of Citrus Heights (REACH) meetings, and regularly scheduled meetings of the History and Arts Commission, Planning Commission and City Council. These meetings generally last for two to three hours and can be expected to conclude by 10 pm. It can be anticipated and expected that the public patio area located at the front of the new city hall facility may be utilized by the community for afterhours events by the History and Arts Commission, City Council functions, and the annual Holiday Tree lighting ceremony The afterhours events would generally include fewer than 50 people although the Holiday Tree lighting ceremony could include a maximum of approximately 250-300 people. Amplified sound would only be used during the City’s annual Holiday Tree lighting.

Medical Office Building (Fountain Square Site)

The proposed Medical Office Building would consist of a three-story approximately 68,727-square-foot building. The proposed site plan in provided in Figure 2. The building would be constructed to meet LEED Silver certification requirements but is not proposed to be certified. The offices would accommodate up to 50 medical providers (such as physicians and nurse practitioners) and 120 additional medical staff. The medical offices would operate during normal business hours of 8:00 a.m. to 6:00 p.m. A few providers (approximately 5) would also offer evening and weekend clinic hours. Lighting would be provided in the parking lot, along pedestrian pathways, and around the building perimeter. The project would include a surface parking lot with 320 spaces.

Legend

: Noise Monitoring Location

Figure Prepared December 2014

Citrus Heights Medical Office BuildingFigure 2: Site Plan and Noise Monitoring Locations

A

B

Greenback Lane

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ENVIRONMENTAL SETTING

Background Information on Noise and Vibration

Fundamentals of Acoustics Acoustics is the science of sound. Sound may be thought of as mechanical energy of a vibrating object transmitted by pressure waves through a medium to human (or animal) ears. If the pressure variations occur frequently enough (at least 20 times per second), then they can be heard and are called sound. The number of pressure variations per second is called the frequency of sound, and is expressed as cycles per second or Hertz (Hz). Noise is a subjective reaction to different types of sounds. Noise is typically defined as (airborne) sound that is loud, unpleasant, unexpected or undesired, and may therefore be classified as a more specific group of sounds. Perceptions of sound and noise are highly subjective from person to person.

Measuring sound directly in terms of pressure would require a very large and awkward range of numbers. To avoid this, the decibel scale was devised. The decibel scale uses the hearing threshold (20 micropascals), as a point of reference, defined as 0 dB. Other sound pressures are then compared to this reference pressure, and the logarithm is taken to keep the numbers in a practical range. The decibel scale allows a million-fold increase in pressure to be expressed as 120 dB, and changes in levels (dB) correspond closely to human perception of relative loudness.

The perceived loudness of sounds is dependent upon many factors, including sound pressure level and frequency content. However, within the usual range of environmental noise levels, perception of loudness is relatively predictable, and can be approximated by A-weighted sound levels. There is a strong correlation between A-weighted sound levels (expressed as dBA) and the way the human ear perceives sound. For this reason, the A-weighted sound level has become the standard tool of environmental noise assessment. All noise levels reported in this section are in terms of A-weighted levels, but are expressed as dB, unless otherwise noted.

The decibel scale is logarithmic, not linear. In other words, two sound levels 10 dB apart differ in acoustic energy by a factor of 10. When the standard logarithmic decibel is A-weighted, an increase of 10 dBA is generally perceived as a doubling in loudness. For example, a 70 dBA sound is half as loud as an 80 dBA sound, and twice as loud as a 60 dBA sound.

Community noise is commonly described in terms of the ambient noise level, which is defined as the all-encompassing noise level associated with a given environment. A common statistical tool to measure the ambient noise level is the average, or equivalent, sound level (Leq), which corresponds to a steady-state A weighted sound level containing the same total energy as a time varying signal over a given time period (usually one hour). The Leq is the foundation of the composite noise descriptor, Ldn, and shows very good correlation with community response to noise.

The day/night average level (Ldn) is based upon the average noise level over a 24-hour day, with a +10 decibel weighing applied to noise occurring during nighttime (10:00 p.m. to 7:00 a.m.) hours. The nighttime penalty is based upon the assumption that people react to nighttime noise exposures as though they were twice as loud as daytime exposures.



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Table 1 lists several examples of the noise levels associated with common situations. Appendix A provides a summary of acoustical terms used in this report.

TABLE 1: TYPICAL NOISE LEVELS

Common Outdoor Activities Noise Level (dBA) Common Indoor Activities

--110-- Rock Band

Jet Fly-over at 300 m (1,000 ft) --100--

Gas Lawn Mower at 1 m (3 ft) --90--

Diesel Truck at 15 m (50 ft),at 80 km/hr (50 mph)

--80-- Food Blender at 1 m (3 ft) Garbage Disposal at 1 m (3 ft)

Noisy Urban Area, DaytimeGas Lawn Mower, 30 m (100 ft)

--70-- Vacuum Cleaner at 3 m (10 ft)

Commercial AreaHeavy Traffic at 90 m (300 ft)

--60-- Normal Speech at 1 m (3 ft)

Quiet Urban Daytime --50-- Large Business Office

Dishwasher in Next Room

Quiet Urban Nighttime --40-- Theater, Large Conference Room (Background)

Quiet Suburban Nighttime --30-- Library

Quiet Rural Nighttime --20-- Bedroom at Night, Concert Hall (Background)

--10-- Broadcast/Recording Studio

Lowest Threshold of Human Hearing --0-- Lowest Threshold of Human Hearing

Source: Caltrans, Technical Noise Supplement, Traffic Noise Analysis Protocol. November 2009.



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Effects of Noise on People

The effects of noise on people can be placed in three categories:

Subjective effects of annoyance, nuisance, and dissatisfaction

Interference with activities such as speech, sleep, and learning

Physiological effects such as hearing loss or sudden startling

Environmental noise typically produces effects in the first two categories. Workers in industrial plants can experience noise in the last category. There is no completely satisfactory way to measure the subjective effects of noise or the corresponding reactions of annoyance and dissatisfaction. A wide variation in individual thresholds of annoyance exists and different tolerances to noise tend to develop based on an individual’s past experiences with noise.

Thus, an important way of predicting a human reaction to a new noise environment is the way it compares to the existing environment to which one has adapted: the so-called ambient noise level. In general, the more a new noise exceeds the previously existing ambient noise level, the less acceptable the new noise will be judged by those hearing it.

With regard to increases in A-weighted noise level, the following relationships occur:

Except in carefully controlled laboratory experiments, a change of 1 dBA cannot be perceived;

Outside of the laboratory, a 3 dBA change is considered a just-perceivable difference;

A change in level of at least 5 dBA is required before any noticeable change in human response would be expected; and

A 10 dBA change is subjectively heard as approximately a doubling in loudness, and can cause an adverse response.

Stationary point sources of noise – including stationary mobile sources such as idling vehicles – attenuate (lessen) at a rate of approximately 6 dB per doubling of distance from the source, depending on environmental conditions (i.e. atmospheric conditions and either vegetative or manufactured noise barriers, etc.). Widely distributed noises, such as a large industrial facility spread over many acres, or a street with moving vehicles, would typically attenuate at a lower rate.



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EXISTING CONDITIONS

The existing noise environment on the project site is defined primarily by traffic on the local roadway network.

Existing Noise Receptors

Some land uses are considered more sensitive to ambient noise levels than others. Land uses often associated with sensitive receptors generally include residences, schools, libraries, hospitals, and passive recreational areas. Noise sensitive land uses are typically given special attention in order to achieve protection from excessive noise. Sensitivity is a function of noise exposure (in terms of both exposure duration and insulation from noise) and the types of activities involved.

In the vicinity of the Stock site, sensitive land uses include existing single-family residential uses to the west of Fountain Square Drive and north of Stock Ranch Road, and a multi-family residential development (Vintage Oaks apartments) east of the project site.

In the vicinity of the Fountain Square project site, sensitive land uses include existing single-family residential uses adjacent to the west side of the site and south of Greenback Lane.

These land uses could potentially experience noise impacts associated with project construction, daily operations, and/or increased traffic from project circulation.

Existing Ambient Noise Levels To quantify the existing ambient noise environment in the project vicinity, four continuous 24-hour noise level measurements were conducted at the nearest sensitive receptors located around the project sites. The noise level measurements were conducted from approximately noon on Tuesday September 23, 2014 through noon on Wednesday September 24, 2014. The noise measurement locations are shown on Figures 1 and 2. The noise level measurement survey results are provided in Table 2. See Appendix B for the complete 24-hour noise measurement results.

The sound level meters were programmed to record the maximum, median, and average noise levels at each site during the survey. The maximum value, denoted Lmax, represents the highest noise level measured. The average value, denoted Leq, represents the energy average of all of the noise received by the sound level meter microphone during the monitoring period. The median value, denoted L50, represents the sound level exceeded 50 percent of the time during the monitoring period.

Larson Davis Laboratories (LDL) Model 820 precision integrating sound level meters were used for the ambient noise level measurement survey. The meters were calibrated before and after use with an LDL Model CAL200 acoustical calibrator to ensure the accuracy of the measurements. The equipment used meets all pertinent specifications of the American National Standards Institute for Type 1 sound level meters (ANSI S1.4).


Environmental Noise Analysis City of Citrus Heights City Hall Relocation & Medical Building – City of Citrus Heights, California

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TABLE 2: SUMMARY OF EXISTING BACKGROUND NOISE MEASUREMENT DATA

Average1 Measured Hourly Noise Levels

Low-High (Average)

Daytime (7:00 am - 10:00 pm) Nighttime (10:00 pm – 7:00 am) Site

Date Ldn Leq L50 Lmax Leq L50 Lmax

Continuous 24 hour noise level measurements

LT-A 9/23/14-9/24/14 67 63-65

(65)

59-64

(63)

75-86

(80)

54-64

(60)

42-61

(51)

74-84

(78)

LT-B 9/23/14-9/24/14 55 48-60

(53)

48-51

(49)

57-80

(65)

41-52

(48)

39-48

(44)

54-72

(60)

LT-C 9/23/14-9/24/14 53 47-55

(51)

43-54

(47)

61-81

(68)

39-49

(44)

36-46

(41)

54-67

(60)

LT-D 9/23/14-9/24/14 57 49-67

(56)

47-51

(49)

57-87

(64)

44-50

(47)

44-48

(46)

55-63

(58)

1. Average values reported are the average of the hourly measured values over the daytime or nighttime period.

Source: j.c. brennan & associates, Inc., 2014.


Environmental Noise Analysis City of Citrus Heights City Hall Relocation & Medical Building – City of

Citrus Heights, CaliforniaPage 10

Existing Roadway Noise Levels To predict noise levels due to traffic, the Federal Highway Administration Highway Traffic Noise Prediction Model (FHWA RD-77-108) was used. The model is used in conjunction with the Calveno reference noise emission curves, and accounts for vehicle volume and speed, roadway configuration, distance to the receiver, and the acoustical characteristics of the project site. The FHWA Model was developed to predict hourly Leq values for free-flowing traffic conditions. To calculate Ldn, average daily traffic (ADT) volume data is adjusted based on the assumed day/evening/night distribution of traffic on the project roadways.

Traffic volumes for existing conditions were obtained from Fehr & Peers (August 2014) in the form of peak hour intersection movements. The peak hour traffic volumes were compiled into segment volumes and converted into daily traffic volumes using a factor of 10. Truck usage and vehicle speeds on the local area roadways were estimated from field observations.

Traffic noise levels are predicted at the sensitive receptors located at the closest typical backyards or other outdoor use areas along each project-area roadway segment. A conservative adjustment of -5 dB is assumed where noise barriers are located adjacent to sensitive receptors or where rear yards are shielded by intervening buildings. In some locations sensitive receptors may not receive full shielding from noise barriers, or may be located at distances which vary from the assumed calculation distance. However, the traffic noise analysis is believed to be representative of the majority of sensitive receptors located closest to the Project area roadway segments analyzed in this report.

Table 3 summarizes the modeled traffic noise levels at the nearest sensitive receptors along each roadway segment in the Project area. Appendix C provides the complete inputs and results of the FHWA traffic modeling.

It should be noted that the distances to the 60 dB Ldn, 65 dB Ldn, and 70 dB Ldn noise contours (shown in Table 3) are measured from the centerline of the roadway. In some cases these noise contour distances are located within the roadway right-of-way and do not approach any adjacent land uses. For example, on Stock Ranch Road, west of Fountain Square Drive, the 60 dB Ldn noise contour is located at a distance of only 7 feet from the roadway centerline. This distance falls within the right-of-way of Stock Ranch Road and the 60 dB Ldn noise contour does not reach the closest residential uses. The closest residential uses have a calculated existing traffic noise exposure of 46.8 dB Ldn at this location.




TABLE 3: EXISTING NOISE LEVELS AND DISTANCES TO CONTOURS

Distance to Contours (feet)

Roadway Segment Exterior Noise

Level, Ldn 70 dB 65 dB 60 dB

Greenback Ln. West of Van Maren Ln. 65.5 30 64 139

Greenback Ln. Van Maren Ln. to Brooktree Dr. 64.6 30 66 141

Greenback Ln. Brooktree Dr. to City Hall Dwy. 65.4 30 64 138

Greenback Ln. City Hall Dwy. to Fountain Square Dr. 58.8 30 64 138

Greenback Ln. Fountain Square Dr. to San Juan Ave. 63.9 29 63 136

Greenback Ln. East of San Juan Ave. 63.8 29 63 135

Stock Ranch Rd. West of Fountain Square Dr. 46.8 2 3 7

Stock Ranch Rd. Fountain Square Dr. to Sylvan Rd. 51.8 3 7 14

Fountain Square Dr. Greenback to City Center Dwy. 41.8 5 11 23

Fountain Square Dr. City Hall Dwy. to Post Office Dwy. 40.8 5 10 21

Fountain Square Dr. Post Office Way to Stock Ranch Rd 52.2 3 7 15

Van Maren Ln North of Greenback Ln. 64.2 24 53 114

Dewey Dr. South of Greenback Ln. 64.7 33 71 154

Sylvan Rd. Greenback to Stock Ranch Rd. 60.9 42 90 194

Sylvan Rd. North of Stock Ranch Rd. 63.5 22 48 103

San Juan Ave South of Greenback Ln. 66.3 42 91 197

Source: FHWA-RD-77-108 with inputs from Fehr & Peers and j.c. brennan & associates, Inc. 2014.




REGULATORY CONTEXT

Federal

In response to the Federal Noise Control Act of 1972, the EPA has identified noise levels requisite to protect public health and welfare against hearing loss, annoyance and activity interference (Information on Levels of Environmental Noise Requisite to Protect Public Health and Welfare with an Adequate Margin of Safety, U.S. EPA 1974; Table 4). One of the purposes of this document is to provide a basis for State and local governments' judgments in setting standards. In doing so, the information presented by the EPA must be utilized along with other relevant factors. These factors include the balance between costs and benefits associated with setting standards at particular noise levels, the nature of the existing or projected noise problems in any particular area, and the local aspirations and the means available to control environmental noise.

The document identifies a 24-hour exposure level of 70 dB as the level of environmental noise which would prevent any measurable hearing loss over a lifetime. Likewise, levels of 55 dB outdoors and 45 dB indoors are identified as preventing activity interference and annoyance. These levels of noise are considered those which will permit spoken conversation and other activities such as sleeping, working and recreation, which are part of the daily human condition. The levels are not single event or peak levels. Instead, they represent averages of acoustic energy over periods of time such as 8 or 24 hours and over even longer periods (e.g., years).

TABLE 4: SUMMARY OF NOISE LEVELS IDENTIFIED AS REQUISITE TO PROTECT THE PUBLIC HEALTH

AND WELFARE

Effect Level dB Activity Area

Hearing Loss 70 Leq (24-hour) All areas.

Outdoor activity interference and annoyance

55 Ldn 55 Leq (24-hour)

Outdoors in residential areas and farms and other outdoor areas where people spend widely varying amounts of time and other places in which quiet is a basis for use. Outdoor areas where people spend limited amounts of time (e.g., school yards, playgrounds)

Indoor activity Interference and Annoyance

45 Ldn 45 Leq (24-hour)

Indoor residential areas. Other indoor areas with human activities (e.g., school yards playgrounds).

Leq (24-hour) Equivalent A-weighted sound level over 24 hours

Ldn Day-night average sound level-the 24 hour A-weighted equivalent sound level, with a 10 decibel penalty applied to nighttime levels

Source: Information on Levels of Environmental Noise Requisite to Protect Public Health and Welfare with an Adequate Margin of Safety. U.S. EPA March 1974.




State

The California Department of Health Services has studied the correlation of noise levels and their effects on various land uses and has established guidelines for evaluating the compatibility of various land uses as a function of community noise exposure. The State of California requires that all municipalities prepare and adopt a comprehensive long-range general plan. General plans must contain a noise element (California Government Code Section 65302(f) and Section 46050.1 of the Health and Safety Code). The requirements for the noise element of the general plan include describing the noise environment quantitatively using a cumulative noise metric such as CNEL or Ldn, establishing noise/land use compatibility criteria, and establishing programs for achieving and/or maintaining land use compatibility. Noise elements should address all major noise sources in the community including mobile and stationary noise sources.

Figure 3 presents general State of California guidelines for environmental noise levels and land use compatibility. These guidelines are used by many agencies, environmental planners, and acoustical specialists as a starting point to evaluate the potential for noise impacts related to the proposed project and methods for achieving noise-compatibility with respect to nearby existing uses.




Figure 3 – State of California Community Noise Exposure Guidelines




Occupational exposure to noise is regulated by California Division of Occupational Safety and Health in Title 8, Group 15, Article 105, Sections 5095–5100. The standard stipulates that protection against the effects of noise exposure shall be provided when sound levels exceed 90 dB over an 8-hour exposure period. Protection shall consist of feasible administrative or engineering controls. If such controls fail to reduce sound levels to within acceptable levels, personal protective equipment shall be provided and used to reduce exposure of the employee.

Additionally, a Hearing Conservation Program must be instituted by the employers whenever employee noise exposure equals or exceeds the action level of an 8-hour time-weighted average sound level of 85 dB. The Hearing Conservation Program requirements consist of periodic area and personal noise monitoring, performance and evaluation of audiograms, provision of hearing protection, annual employee training, and record keeping.

CEQA (PRC Section 21000 et seq.) requires identification of “significant” environmental impacts and their feasible mitigation. Section XI of Appendix G to the State CEQA Guidelines (CCR Title 14, App. G) lists some indicators of potentially significant impacts, which are included below under “Thresholds of Significance.”

Local City of Citrus Heights General Plan: The City of Citrus Heights General Plan Noise Element establishes goals and policies, as well as criteria for evaluating the compatibility of individual land uses with respect to noise exposure. The intent is to provide guidance for determining noise impacts due to, and upon proposed projects. Policy 51.1: Review proposed development projects for compliance with the standards in Table 10: Acceptable Noise Levels (Figure 4 of this report). If it appears that a project may exceed the limits of Table 10, require an acoustical analysis to identify potential noise levels and attenuation methods. Policy 51.4: Require major development proposals to reduce noise impacts on adjacent properties through appropriate techniques including, but not limited to, the following strategies:

• Permit well-designed sounds wall when compatible with the surrounding area • Screen and control noise sources such as parking, outdoor activities and mechanical

equipment • Increase setbacks for noise sources from adjacent dwellings • Whenever possible, retain fences, walls or landscaping that serve as noise buffers

(although design, safety and other impacts must also be addressed) • Use soundproofing material and double-glazed windows • Control hours of operation, including deliveries and trash pickup

Policy 51.5: When located adjacent to existing or planned sensitive residential and public/quasi-public uses, require new nonresidential development to mitigate noise to a maximum of 60 dBA Ldn at the property line.




Figure 4 – “Acceptable Noise Levels” City of Citrus Heights General Plan Noise Element




City of Citrus Heights Noise Ordinance (Zoning Code Chapter 34, Article III ): The City of Citrus Heights Noise Ordinance (Section 34-86) establishes the noise level performance standards shown in Table 5.

TABLE 5: HOURLY NOISE LEVEL PERFORMANCE STANDARDS FOR STATIONARY NOISE SOURCES CITY OF CITRUS HEIGHTS NOISE ORDINANCE

Acceptable Noise Level, dBA1 Cumulative Duration of the Intrusive Sound

Daytime (7 am - 10 pm) Nighttime (10 pm - 7 am)

30 (L50) 15 (L25) 5 (L8) 1 (L2)

Level not to be exceeded for any time per hour (Lmax)

55 60 65 70 75

50 55 60 65 70

1Each of the noise limits specified in this table shall be reduced by five dBA for impulsive or simple tone noises or for noises consisting of speech or music. If the ambient noise level exceeds that permitted by any of the first four noise limit categories specified in subsection of this section, the allowable noise limit shall be increased in five-dBA increments in each category to encompass the ambient noise level. If the ambient noise level exceeds the fifth noise level category, the maximum ambient noise level shall be the noise limit for that category.

Note: Ln means the percentage of time the noise level is exceeded during an hour. L50 means the level exceeded 50% of the hour; L25 is the level exceeded 25% of the hour, etc.

The following noise exemptions are provided in Section 34-88 of the Noise Ordinance. Sec. 34-88. - Exemptions.

The following activities shall be exempted from this article:

(1) School bands, school athletic and school entertainment events.

(2) Outdoor gatherings, public dances, shows and sporting and entertainment events, provided the events are conducted pursuant to a license or permit by the city.

(3) Activities conducted on parks, public playgrounds and school grounds, provided such parks, playgrounds and school grounds are owned and operated by a public entity or private school.

(4) Any mechanical device, apparatus or equipment related to or connected with emergency activities or emergency work.

(5) Noise sources associated with construction, repair, remodeling, demolition, paving or grading of any real property, provided the activities do not take place between the hours of 8:00 p.m. and 6:00 a.m. on weekdays and Friday commencing at 8:00 p.m. through and including 7:00 a.m. on Saturday, Saturdays commencing at 8:00 p.m. through and including 7:00 a.m. on the next following Sunday, and on each Sunday after the hour of 8:00 p.m. However, when an unforeseen or unavoidable condition occurs during a construction project and the nature of the project necessitates that work in process be continued until a specific phase is completed, the contractor or owner shall be allowed to continue work after 8:00 p.m. and to operate machinery and equipment necessary until completion of the specific work in progress can be brought




to conclusion under conditions which will not jeopardize inspection acceptance or create undue financial hardships for the contractor or owner.

(6) Noise sources associated with agricultural operations, provided such operations do not take place between the hours of 8:00 p.m. and 6:00 a.m.

(7) Any mechanical device, apparatus or equipment which is utilized for the protection or salvage of agricultural crops during periods of adverse weather conditions or when the use of mobile noise sources is necessary for pest control.

(8) Noise sources associated with maintenance of residential area property, provided the activities take place between the hours of 6:00 a.m. and 8:00 p.m. on any day except Saturday or Sunday, or between the hours of 7:00 a.m. and 8:00 p.m. on Saturday or Sunday.

(9) Any activity, to the extent provisions of 42 USC 65 and Public Utilities Code §§ 21661—21669.6 and 21670—21679.5 preempt local control of noise regulations and land use regulations related to noise control of airports and their surrounding geographical areas; any noise source associated with the construction, development, manufacture, maintenance, testing or operation of any aircraft engine or of any weapons system or subsystems which are owned, operated or under the jurisdiction of the United States; or any other activity to the extent regulation thereof has been preempted by state or federal law or regulation.

(10) Any noise sources associated with the maintenance and operation of aircraft or airports which are owned or operated by the United States.

(Ord. No. 97-01, § 2(6.68.090), 1-2-1997; Ord. No. 97-13, § 2, 3-26-1997; Ord. No. 97-17, § 2, 9-24-1997)

Based upon review of the City of Citrus Heights General Plan Noise Element and Noise Ordinance standards, the City’s Noise Ordinance standards are the most restrictive standards for noise-generating activities which could occur with the proposed project. Such activities would include parking lot activities, outdoor events, mechanical equipment, and the use of amplified music. Because the proposed Medical Office Building project would operate during the hours 8:00 am to 6:00 pm (with possible evening hours) and the City Hall project would operate between 8:00 am to 5:00 pm (with evening meetings and events) application of the City’s 55 dB L50 and 75 dB Lmax daytime (7:00 a.m. to 10:00 p.m.) exterior noise level standards would be the most appropriate standards for the project. For noise consisting primarily of speech or music, the Table 5 standards are to be lowered by 5 dB. It is anticipated that no amplified sound or music would be allowed to occur beyond 10:00 p.m.




Criteria for Acceptable Vibration Vibration is like noise in that it involves a source, a transmission path, and a receiver. While vibration is related to noise, it differs in that in that noise is generally considered to be pressure waves transmitted through air, whereas vibration usually consists of the excitation of a structure or surface. As with noise, vibration consists of an amplitude and frequency. A person’s perception to the vibration will depend on their individual sensitivity to vibration, as well as the amplitude and frequency of the source and the response of the system which is vibrating.

Vibration can be measured in terms of acceleration, velocity, or displacement. A common practice is to monitor vibration measures in terms of peak particle velocities in inches per second. Standards pertaining to perception as well as damage to structures have been developed for vibration levels defined in terms of peak particle velocities.

The City of Citrus Heights does not have specific policies pertaining to vibration levels. However, perceptible vibrations at the property line of a site are prohibited by Section 106.30.080 of the City’s Zoning Ordinance. The exact language of the Zoning Ordinance restriction is provided below:

E. Ground vibration. No ground vibration shall be generated that is perceptible without instruments by a reasonable person at the property lines of the site, except for vibrations from temporary construction or demolition activities, and motor vehicle operations.

Human and structural response to different vibration levels is influenced by a number of factors, including ground type, distance between source and receptor, duration, and the number of perceived vibration events. Table 6, which was developed by Caltrans, shows the vibration levels which would normally be required to result in damage to structures. The vibration levels are presented in terms of peak particle velocity (PPV) in inches per second.

TABLE 6: EFFECTS OF VARIOUS VIBRATION LEVELS ON BUILDINGS

Maximum PPV (in/sec)

Structure and Condition Transient Sources Continuous/Frequent Intermittent Sources

Extremely fragile historic buildings, ruins, ancient monuments

0.12 0.08

Fragile buildings 0.20 0.10

Historic and some old buildings 0.50 0.25

Older residential structures 0.50 0.30

New residential structures 1.00 0.50

Modern industrial/commercial buildings 2.00 0.50

Source: Transportation and Construction Vibration Guidance Manual. California Department of Transportation:

Division of Environmental Analysis. September 2013.




Substantial Increase Criteria

CEQA does not define a threshold of “significant increase” regarding noise exposure. Research into the human perception of changes in sound level indicates the following:

A 3-dB change is barely perceptible, A 5-dB change is clearly perceptible, and A 10-dB change is perceived as being twice or half as loud.

A limitation of using a single noise level increase value to evaluate noise impacts is that it fails to account for pre-project-noise conditions. Table 7 is based upon recommendations made by the Federal Interagency Committee on Noise (FICON) to provide guidance in the assessment of changes in ambient noise levels resulting from aircraft operations. The recommendations are based upon studies that relate aircraft noise levels to the percentage of persons highly annoyed by the noise. Although the FICON recommendations were specifically developed to assess aircraft noise impacts, it has been accepted that they are applicable to all sources of noise described in terms of cumulative noise exposure metrics such as the Ldn.

TABLE 7: SIGNIFICANCE OF CHANGES IN NOISE EXPOSURE

Ambient Noise Level Without Project Increase Required for Significant Impact

<60 dB +5.0 dB or more

60-65 dB +3.0 dB or more

>65 dB +1.5 dB or more

Source: Federal Interagency Committee on Noise (FICON)

Based on the Table 7 data, an increase in the traffic noise level of 3.0 dB or more would be significant where the pre-project noise level are within 60-65 dB Ldn. Extending this concept to higher noise levels, an increase in the traffic noise level of 1.5 dB or more may be significant where the pre-project traffic noise level exceeds 65 dB Ldn. The rationale for the Table 7 criteria is that, as ambient noise levels increase, a smaller increase in noise resulting from a project is sufficient to cause annoyance.




IMPACTS AND MITIGATION MEASURES

Thresholds of Significance

Appendix G of the CEQA Guidelines states that a project would normally be considered to result in significant noise impacts if noise levels conflict with adopted environmental standards or plans or if noise generated by the project would substantially increase existing noise levels at sensitive receivers on a permanent or temporary basis. Significance criteria for noise impacts are drawn from CEQA Guidelines Appendix G (Items XI [a-f]).

Would the project:

a. Expose persons to or generate noise levels in excess of standards established in the local general plan or noise ordinance, or applicable standards of other agencies. Specifically, new exceedances of the City’s 60 dB Ldn exterior noise level standard at existing residential outdoor activity areas or the Table 5 limits at the property line of existing residential uses;

b. Expose persons to, or generate, excessive groundborne vibration or groundborne noise levels. Vibrations associated with construction activities are exempted by the City (Zoning Ordinance 106.30.080);

c. Cause a substantial permanent increase in ambient noise levels in the project vicinity above existing levels without the project. Specifically, increases exceeding the Table 7 criteria);

d. Cause a substantial temporary or periodic increase in ambient noise levels in the project vicinity above existing levels without the project. Specifically, increases exceeding the Table 7 criteria, with the exception of construction noise which is exempted during the hours outlined in the City Noise Ordinance, Section 34-88(5);

e. Expose persons residing or working in the project area to excessive noise levels if located within an airport land use plan or where such a plan has not been adopted within 2 miles of a public airport or public use airport; or

f. Expose persons residing or working in the project area to excessive noise levels if located within the vicinity of a private airstrip.

The proposed project is not located within two miles of a public or private airport, therefore items “e” and “f” are not discussed any further in this study.




Project-Specific Impacts and Mitigation Measures

Impact 1 Construction noise and vibration at sensitive receptors

Construction of the Proposed Project would temporarily increase noise levels during construction. Construction activity would also generate temporary groundborne vibrations. This would be a less than significant impact.

Construction Noise Noise impacts resulting from construction depend on the noise generated by various pieces of construction equipment, the timing and duration of noise generating activities, and the distance between construction noise sources and noise-sensitive areas. Noise levels from construction equipment are shown in Table 8. The data in Table 8 are based on the Roadway Construction Noise Model (RCNM). The RCNM is the Federal Highway Administration’s (FHWA) national model for the prediction of construction noise. This model contains one of the most comprehensive sets of construction equipment noise level data. The model was developed During the Central Artery/Tunnel (CA/T) project in Boston, Massachusetts and is one of the most widely used models for predicting construction related noise levels for projects in the United States and is still considered to be well representative of modern construction equipment. Annoyance due to construction activities primarily occurs when: 1) construction activities occur during noise-sensitive times of the day (e.g., early morning, evening, or nighttime hours); 2) the construction occurs in areas immediately adjoining noise-sensitive land uses; or 3) when construction lasts over extended periods of time. Noise generated by construction would be the greatest during site grading activities and excavation for underground utilities. Activities involved in construction would generate maximum noise levels, as indicated in Table 8, ranging from 76 to 90 dB at a distance of 50 feet. Construction activities would be temporary in nature and are anticipated to occur during normal daytime working hours as outlined in the City Noise Ordinance. Noise would also be generated during the construction phase by increased truck traffic on area roadways. A primary project-generated noise source would be truck traffic associated with transport of heavy materials and equipment to and from construction sites. This noise increase would be of short duration, and would occur primarily during daytime hours.




TABLE 8: CONSTRUCTION EQUIPMENT NOISE Predicted Noise Levels, Lmax dB Distances to Noise Contours (feet)

Type of Equipment Noise

Level at 50’

Noise Level at

100’

Noise Level at

200’

Noise Level at

400’

70 dB Lmax

contour 65 dB Lmax

contour

Backhoe 78 72 66 60 126 223

Compactor 83 77 71 65 223 397

Compressor (air) 78 72 66 60 126 223

Concrete Saw 90 84 78 72 500 889

Dozer 82 76 70 64 199 354

Dump Truck 76 70 64 58 100 177

Excavator 81 75 69 63 177 315

Generator 81 75 69 63 177 315

Jackhammer 89 83 77 71 446 792

Pneumatic Tools 85 79 73 67 281 500

Source: Roadway Construction Noise Model User’s Guide. Federal Highway Administration. FHWA-HEP-

05-054. January 2006.

Construction activities on the Stock site will occur at distances ranging between approximately 100 feet to over 800 feet from the nearest noise-sensitive receptors. The residential receptors located closest to the Stock site, on the west side of Fountain Square Drive, will receive some shielding from construction noise due to the presence of an existing 6-foot tall masonry wall. Construction activities on the Fountain Square Site will occur at distances ranging between approximately 25 feet to over 300 feet from the nearest noise-sensitive receptors. The City’s Noise Ordinance section 34-88(5) provides the following exemption for construction activities:

(5) Noise sources associated with construction, repair, remodeling, demolition, paving or grading of any real property, provided the activities do not take place between the hours of 8:00 p.m. and 6:00 a.m. on weekdays and Friday commencing at 8:00 p.m. through and including 7:00 a.m. on Saturday, Saturdays commencing at 8:00 p.m. through and including 7:00 a.m. on the next following Sunday, and on each Sunday after the hour of 8:00 p.m. However, when an unforeseen or unavoidable condition occurs during a construction project and the nature of the project necessitates that work in process be continued until a specific phase is completed, the contractor or owner shall be allowed to continue work after 8:00 p.m. and to operate machinery and equipment necessary until completion of the specific work in progress can be brought to conclusion under conditions which will not jeopardize inspection acceptance or create undue financial hardships for the contractor or owner.




Construction Vibration The primary vibration-generating activities associated with the project would occur when the infrastructure such as grading, utilities, and parking lots are constructed. Sensitive receptors could be impacted by construction related vibrations, especially vibratory compactors/rollers. Construction activities on the Stock site will occur at distances ranging between approximately 100 feet to over 800 feet from the nearest sensitive receptors. Construction activities on the Fountain Square Site will occur at distances ranging between approximately 25 feet to over 300 feet from the nearest sensitive receptors. Construction vibration impacts could include cosmetic or minor structural damage if safe levels of vibration are exceeded. Table 9 shows the typical vibration levels produced by construction equipment, at distances of 25 feet and 100 feet.

TABLE 9: VIBRATION LEVELS FOR VARYING CONSTRUCTION EQUIPMENT

Type of Equipment

Peak Particle Velocity @ 25 feet

(inches/second)

Peak Particle Velocity @ 100 feet

(inches/second)

Large Bulldozer 0.09 0.03

Loaded Trucks 0.08 0.03

Small Bulldozer 0.00 0.00

Auger/drill Rigs 0.09 0.03

Jackhammer 0.04 0.01

Vibratory Hammer 0.07 0.02

Vibratory Compactor/roller 0.21 0.07

Source: Federal Transit Administration, Transit Noise and Vibration Impact Assessment Guidelines, May

2006 Based upon the Caltrans vibration damage criteria outlined in Table 6, continuous vibrations exceeding 0.3 in/sec PPV could cause damage to “older residential structures.” Based upon the Table 9 data, no construction equipment is predicted to cause vibrations exceeding 0.3 in/sec PPV at distances of 25 feet, or greater. Therefore, no residential structures would be exposed to vibrations exceeding the threshold for vibration damage of 0.3. in/sec PPV.




Additionally, any perceptible construction vibrations would be exempt under Zoning Ordinance section 106.30.080(E) which provides the following exemption to construction vibrations:

E. Ground vibration. No ground vibration shall be generated that is perceptible without instruments by a reasonable person at the property lines of the site, except for vibrations from temporary construction or demolition activities, and motor vehicle operations.

Because all construction activities will be subject to the requirements of the City of Citrus Heights with respect to limits on construction noise and vibration this would be a less than significant impact.

Mitigation Measure for Impact 1:

None Required




Impact 2 Traffic Noise at Sensitive Receptors

Traffic generated by the Proposed Project could generate traffic noise increases. However, these increases would not exceed the FICON criteria outlined in Table 7. Additionally, the proposed project would not cause exceedances of the City of Citrus Heights 60 dB Ldn exterior noise level standard for residential uses. This would be a less than significant impact.

To predict noise levels due to traffic, the Federal Highway Administration Highway Traffic Noise Prediction Model (FHWA RD-77-108) was used. The model is used in conjunction with the Calveno reference noise emission curves, and accounts for vehicle volume and speed, roadway configuration, distance to the receiver, and the acoustical characteristics of the project site. The FHWA Model was developed to predict hourly Leq values for free-flowing traffic conditions. To calculate Ldn, average daily traffic (ADT) volume data is adjusted based on the assumed day/evening/night distribution of traffic on the project roadways.

Traffic volumes for existing conditions were obtained from Fehr & Peers (November 2014) in the form of peak hour intersection movements. The peak hour traffic volumes were compiled into segment volumes and converted into daily traffic volumes using a factor of 10. Truck usage and vehicle speeds on the local area roadways were estimated from field observations.

Tables 10-12 show the predicted increases in traffic noise levels on the local roadway network for existing and future project and no-project conditions. Appendix C provides the complete inputs and results of the FHWA traffic noise prediction model.

Tables 10-12 show traffic noise levels at backyards or other outdoor-use areas located at the closest typical setback distance along each project-area roadway segment. A conservative adjustment of -5 dB is assumed where noise barriers are located adjacent to sensitive receptors or where rear yards are shielded by intervening buildings. In some locations sensitive receptors may not receive full shielding from noise barriers, or may be located at distances which vary from the assumed calculation distance. However, the traffic noise analysis is believed to be representative of the majority of sensitive receptors located closest to the Project area roadway segments analyzed in this report.

For example, residential uses located adjacent to Fountain Square Drive between the Post Office driveway and Stock Ranch Road have an existing traffic noise exposure of 52.2 dB Ldn, as shown in Table 10. Once the project is constructed, the existing plus project traffic noise is predicted to increase by 0.6 dB to 52.8 dB Ldn. This increase is less than the City’s substantial increase criteria of +5 dB. Tables 11 and 12 can be used in the same manor to see traffic noise levels under future conditions with and without the project.



Page 27

TABLE 10: PREDICTED TRAFFIC NOISE LEVELS AND PROJECT-RELATED TRAFFIC NOISE LEVEL INCREASES (EXISTING VS. EXISTING PLUS PROJECT)

Predicted Ldn @ Closest Sensitive Receptors – 1st Floor Outdoor Activity Areas

Roadway Segment Existing Existing + Project Change Criteria Significant?

Greenback Ln. West of Van Maren Ln. 65.5 65.6 0.1 +1.5 dBA No

Greenback Ln. Van Maren Ln. to Brooktree Dr. 64.6 64.7 0.1 +3 dBA No

Greenback Ln. Brooktree Dr. to City Hall Dwy. 65.4 65.6 0.1 +1.5 dBA No

Greenback Ln. City Hall Dwy. to Fountain Square Dr. 58.8 59.0 0.1 +5 dBA No

Greenback Ln. Fountain Square Dr. to San Juan Ave. 63.9 64.0 0.1 +3 dBA No

Greenback Ln. East of San Juan Ave. 63.8 63.9 0.0 +3 dBA No

Stock Ranch Rd. West of Fountain Square Dr. 46.8 46.9 0.2 +5 dBA No

Stock Ranch Rd. Fountain Square Dr. to Sylvan Rd. 51.8 52.0 0.2 +5 dBA No

Fountain Square Dr. Greenback to City Center Dwy. 41.8 42.8 1.0 +5 dBA No

Fountain Square Dr. City Hall Dwy. to Post Office Dwy. 40.8 41.2 0.4 +5 dBA No

Fountain Square Dr. Post Office Way to Stock Ranch Rd 52.2 52.8 0.6 +5 dBA No

Van Maren Ln North of Greenback Ln. 64.2 64.2 0.0 +3 dBA No

Dewey Dr. South of Greenback Ln. 64.7 64.7 0.1 +3 dBA No

Sylvan Rd. Greenback to Stock Ranch Rd. 60.9 60.9 0.1 +3 dBA No

Sylvan Rd. North of Stock Ranch Rd. 63.5 63.6 0.1 +3 dBA No

San Juan Ave South of Greenback Ln. 66.3 66.3 0.0 +1.5 dBA No

Source: j.c. brennan & associates, Inc., Inc., FHWA RD-77-108 Traffic Noise Prediction Model and Fehr & Peers. 2014.



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TABLE 11: PREDICTED TRAFFIC NOISE LEVELS AND PROJECT-RELATED TRAFFIC NOISE LEVEL INCREASES (CUMULATIVE EXISTING ZONING VS. CUMULATIVE PLUS PROJECT)


Roadway Segment Cumulative

Existing Zoning Cumulative +

Project Change Criteria Significant?


Greenback Ln. Van Maren Ln. to Brooktree Dr. 65.1 65.2 0.1 +1.5dBA No








Fountain Square Dr. City Hall Dwy. to Post Office Dwy. 41.2 41.4 0.2 +5 dBA No

Fountain Square Dr. Post Office Way to Stock Ranch Rd 52.8 53.1 0.3 +5 dBA No

Van Maren Ln. North of Greenback Ln. 65.2 65.2 0.0 +1.5 dBA No

Dewey Dr. South of Greenback Ln. 65.5 65.6 0.0 +1.5 dBA No




Source: j.c. brennan & associates, Inc., Inc., FHWA RD-77-108 Traffic Noise Prediction Model, Caltrans, and Fehr & Peers. 2014.



Page 29

TABLE 12: PREDICTED TRAFFIC NOISE LEVELS AND PROJECT-RELATED TRAFFIC NOISE LEVEL INCREASES (CUMULATIVE NO DEVELOPMENT VS. CUMULATIVE PLUS PROJECT)


Roadway Segment Cumulative No Development

Cumulative + Project Change Criteria Significant?


Greenback Ln. Van Maren Ln. to Brooktree Dr. 65.1 65.2 0.1 +1.5 dBA No








Fountain Square Dr. City Hall Dwy. To Post Office Dwy. 40.8 41.4 0.6 +5 dBA No

Fountain Square Dr. Post Office Way. To Stock Ranch Rd 52.2 53.1 -1.1 +5 dBA No

Van Maren Ln. North of Greenback Ln. 65.2 65.2 0.0 +1.5 dBA No

Dewey Dr. South of Greenback Ln. 65.5 65.6 0.1 +1.5 dBA No




Source: j.c. brennan & associates, Inc., Inc., FHWA RD-77-108 Traffic Noise Prediction Model, Caltrans, and Fehr & Peers. 2014.


Environmental Noise AnalysisCity Hall Relocation & Medical Building – City of Citrus Heights, California

Page 30

Tables 10-12 indicate that some noise sensitive receptors located along the project-area roadways are currently exposed to exterior traffic noise levels exceeding the City of Citrus Heights 60 dB Ldn exterior noise level standard for residential uses. These receptors will continue to experience elevated exterior noise levels with implementation of the proposed project. However, the project is not predicted to cause any new exceedances of the City’s 60 dB Ldn exterior noise level standard. This impact would be less than significant under CEQA checklist threshold (a) under Existing Plus Project, Cumulative Existing Zoning, and Cumulative No Development conditions. Additionally, the noise level increases associated with the proposed project do not exceed the FICON substantial increase criteria outlined above on any roadway segments, including those where existing noise levels exceed 60 dB Ldn. Therefore, this would be a less-than-significant impact relative to the CEQA checklist threshold (c) under Existing Plus Project, Cumulative Existing Zoning, and Cumulative No Development conditions


None Required

Impact 3 Project Generated Noise at Sensitive Receptors adjacent to the City Hall and Utility Yard (Stock Site)

The proposed project could generate noise levels from on-site activities which may exceed the City’s noise standards at existing residential uses. Such activities may include parking lot circulation, Utility Yard activities, outdoor events, amplified sound, and HVAC mechanical equipment. This would be a less than significant impact.

Noise Generation Methodology A detailed analysis of project-related noise levels was conducted using the CadnaA (Computer Aided Noise Abatement) sound prediction model.1 The CadnaA model state-of-the-art noise prediction model, is able to predict overall noise levels for multiple noise sources, while also accounting for topography, building shielding, roadway grade, and typical atmospheric conditions according to International Standards Organization (ISO) 9613 -“Attenuation of sound during propagation outdoors.” Inputs to the CadnaA model included topography, ground type, existing and proposed building footprints, and receptor locations. Sound power level data for each of the project on-site noise sources was used as direct inputs to the CadnaA Noise Prediction Model. A discussion of each of the project noise sources and noise level data is provided below. Parking Lot Noise Parking lot noise typically includes periods of conversation, doors slamming, engines starting and stopping and vehicle passage. j.c. brennan & associates, Inc. file data for parking lot activities was used to model the parking lot noise environment for the project site. An average sound exposure level (SEL) of 71 dB at a distance of 50 feet was used to represent parking lot arrivals and departures. AM and PM peak hour project trip generations were provided by Fehr & Peers. The traffic analysis indicates that the peak hour trip generation is 60 (AM peak hour) for the City 1 DataKustik, CadnaA State of the Art Noise Prediction Software, Greifenberg Germany, 2009



Page 31

Hall. For special events which could include up to 300 people, the trip generation would be approximately 200 vehicles in and 200 out (400 total). This analysis conservatively assumes that all 400 trips could occur within a one-hour period. Based upon these trip generation rates, the peak hour Leq value for each parking area can be calculated as follows:

Leq = SEL + 10 log Neq - 35.6, dB where: SEL is the mean SEL of the event, Neq is the sum of the number of hourly events, and 35.6 is 10 times the logarithm of the number of seconds in an hour. Based upon the above formula, the hourly Leq for the City Hall parking lot activity would be 53.2 dBA Leq at a distance of 50 feet for daily operations and approximately 61.4 dBA Leq for special events with up to 300 people. Table 13 summarizes the estimated project noise generation. Utility Yard The Utility Yard would include an approximately 4,000 square-foot, one-story storage/maintenance building, indoor and outdoor equipment storage, and paved parking lot for city vehicles. Equipment stored onsite would include items like a chipper, water tank trailer, necessary tools and accessories needed for emergency situations, street signs and street light materials. According to the project traffic study, the Utility Yard is predicted to have a total peak hour trip generation of three vehicles. Because the project includes storage of larger vehicles and trucks, this analysis assumes that all three vehicle trips may consist of trucks. A typical heavy truck passage generated an average sound exposure level (SEL) of 84 dBA at a distance of 50 feet. This SEL was used to represent Utility Yard vehicle movements. The peak hour Leq value for the Utility Yard area can be calculated as follows:

Leq = SEL + 10 log Neq - 35.6, dB where: SEL is the mean SEL of the event, Neq is the sum of the number of hourly events, and 35.6 is 10 times the logarithm of the number of seconds in an hour. Based upon the above formula, the hourly Leq for the Utility Yard would be 53.2 dBA Leq at a distance of 50 feet. Table 13 summarizes the estimated project noise generation.



Page 32

Public Patio j.c. brennan & associates, Inc. assumed that a typical day might include approximately 25 people in the public patio conversing and up to 300 people for larger special events In order to quantify outdoor noise levels from these gatherings, j.c. brennan & associates, Inc. used sound pressure level data for typical speech efforts to model the expected crowd noise from these types of events . Additionally, because special events could include the use of amplified sound or music, j.c. brennan & associates, Inc. assumed the a noise level of 75 dBA (L50) at a distance of 50 feet. This noise level would be typical of a public address (PA) system or background music at a special event. Table 13 summarizes the estimated project noise generation. Mechanical Equipment Noise At this time detailed information on the project’s mechanical equipment is not available. However, based upon the size and use of the building, the proposed City Hall would likely include the use of rooftop-mounted heating, ventilation, and air-conditioning (HVAC) equipment. It is estimated that packaged HVAC units would be used to provide approximately 100 tons of cooling capacity to the building. For the purpose of this analysis, it was assumed that two 50-ton HVAC units would be used. The packaged rooftop units used in this analysis are the Lennox Energence Rooftop 50 ton LCH/LGH units having a sound power level of 91.0 dBA with all compressors operating, or a total sound power level of 94.0 dBA for both units in operation. It should be noted that sound power is a representation of the total sound output of the noise source and does not require a distance to be specified. For example, the 91.0 dBA sound power level would be equivalent to a sound pressure level of 55 dBA at a distance of 50 feet. Sound power levels are used in the CadnaA sound prediction model to calculate noise levels at the nearest sensitive receptors. Table 13 summarizes the estimated project noise levels which were used in the CadnaA sound prediction model.



Page 33

Table 13: Project Noise Source Sound Power Levels – City Hall Site

Location Noise Source Total Hourly Leq/L50 at 50 feet 1 Sound Power Level

Typical Operations

Patio Area 25 People conversing at typical speech

levels (60 dBA at 3 feet) 49.6 dBA 81.2 dBA

Parking Lot Activity Vehicle circulation, car doors shutting,

car alarm beeps (60 vehicle trips)

53.2 dBA 84.9 dBA

Utility Yard Vehicle circulation (3 trips) 53.2 dBA 84.9 dBA

Mechanical Equipment Rooftop HVAC Operating 62.3 dBA 94.0 dBA

Special Events Patio Area Amplified sound, music 75.0 dBA 106.7 dBA

Patio Area 300 People conversing at typical speech levels (60 dBA at 3 feet)

60.3 dBA 92.0 dBA

Parking Lot Activity Vehicle circulation, car doors shutting,

car alarm beeps (400 vehicle trips)

61.4 dBA 93.1 dBA

Utility Yard Vehicle circulation (3 trips) 53.2 dBA 84.9 dBA

Mechanical Equipment Rooftop HVAC Operating 62.3 dBA 94.0 dBA 1 Maximum noise levels for these noise source are generally 10-15 dB higher than the average (Leq/L50) values. Because the City’s maximum (Lmax) noise level standards are 20 dB higher than the L50 standards, compliance with the L50 standard will also result in compliance with the Lmax standard. Therefore, typical Lmax noise levels are not shown in this Table.



Page 34

City Hall and Utility Yard (Stock Site) Predicted Noise Levels for Typical Operations The Table 13 data was used with the CadnaA sound prediction model to calculate the potential noise exposure of the project at the nearest noise-sensitive receptors. The predicted project-generated noise contours for daily operations are shown on Figure 5. Based upon the Figure 5 data, the project is predicted to generate exterior noise levels between 37-38 dBA L50 at the nearest residential receptors located around the project site. This complies with the City’s 55 dBA exterior noise level standard. Therefore, this impact would be less than significant under CEQA checklist threshold (a). Additionally, the increase in ambient (L50) noise levels is predicted to be less than 1 dBA. This would be less than the FICON substantial increase criteria outlined above. Therefore, this would be a less than significant impact relative to the CEQA checklist threshold (b). City Hall and Utility Yard (Stock Site) Predicted Noise Levels for Special Events The Table 13 data was used with the CadnaA sound prediction model to calculate the potential noise exposure of the project at the nearest noise-sensitive receptors. The predicted project-generated noise contours for special events (without amplified sound) are shown on Figure 6. It should be noted that most afterhours events will generally include fewer than 50 people while the Holiday Tree lighting ceremony could include a maximum of approximately 250-300 people. However, the analysis on Figure 6 conservatively includes 300 people. Based upon the Figure 6 data, the project is predicted to generate exterior noise levels between 39-43 dBA L50 at the nearest residential receptors located around the project site for special events which do not include the use of amplified sound. This complies with the City’s 55 dBA exterior noise level standard. Therefore, this impact would be less than significant under CEQA checklist threshold (a). Additionally, the increase in ambient (L50) noise levels is predicted to be less than 1.5 dBA. This would be less than the FICON substantial increase criteria outlined above. Therefore, this would be a less than significant impact relative to the CEQA checklist threshold (b). The predicted project-generated noise contours for special events (with amplified sound) are shown on Figure 7. It is expected that amplified sound would be used once per year during the Holiday Tree lighting ceremony.



Page 35

Based upon the Figure 7 data, the project is predicted to generate exterior noise levels between 40-58 dBA L50 at the nearest residential receptors located around the project site, resulting in an 11.3 dBA increase in ambient noise. Because special events would include the use of amplified sound or music, the City’s Noise Ordinance limits would be lowered by 5 dBA to 50 dBA L50 during daytime (7:00 am to 10:00 pm) hours. The predicted noise levels of 58 dB L50 would exceed the City’s Noise Ordinance limit of 50 dBA L50 (includes a -5 dB penalty for noise including speech or music). However, Section 34-88 of the City’s Noise Ordinance specifically exempts noise from these types of special events, as outlined below:

Sec. 34-88. - Exemptions. The following activities shall be exempted from this article:

(1) School bands, school athletic and school entertainment events.

(2) Outdoor gatherings, public dances, shows and sporting and entertainment events provided the events are conducted pursuant to a license or permit by the city.

Therefore, this would be a less than significant impact.


None Required

Legend

Predicted Noise Levels (Leq)

: 50-55 dBA

: 55-60 dBA

: 60-65 dBA


Citrus Heights City Hall

and Medical Office Building ProjectFigure 5: City Hall Noise Contours (Typical Operations)

50-55 dBA

55-60 dBA60-65 dBA

Existing Ambient Noise = 47 dBA

Project Noise = 37 dBA

Total = 47.4

Increase = 0.4 dBA



Total = 49.3 dBA

Increase = 0.3 dBA

HVAC1

HVAC2

Legend


: 50-55 dBA

: 55-60 dBA

: 60-65 dBA



and Medical Office Building ProjectFigure 6: City Hall Noise Contours

(Special Events – No Music/Amplified Sound)

50-55 dBA

55-60 dBA

60-65 dBAExisting Ambient Noise = 47 dBA


Total = 48.5

Increase = 1.5 dBA



Total = 49.5 dBA

Increase = 0.5 dBA

HVAC1

HVAC2

Legend


: 50-55 dBA

: 55-60 dBA

: 60-65 dBA



and Medical Office Building ProjectFigure 7: City Hall Noise Contours

(Special Event with Amplified Sound)

50-55 dBA

55-60 dBA

60-65 dBA



Total = 58.8

Increase = 11.3 dBA



Total = 49.5 dBA

Increase = 0.5 dBA

HVAC1

HVAC2



Page 39

Impact 4 Project Generated Noise at Sensitive Receptors adjacent to the Medical Office Building (Fountain Square Site)

The proposed project could generate noise levels from on-site activities which may exceed the City’s noise standards at existing residential uses. Such activities may include parking lot circulation and HVAC mechanical equipment. This would be a less than significant impact.

Noise Generation Methodology A detailed analysis of project-related noise levels was conducted using the CadnaA (Computer Aided Noise Abatement) sound prediction model.2 The CadnaA model state-of-the-art noise prediction model, is able to predict overall noise levels for multiple noise sources, while also accounting for topography, building shielding, roadway grade, and typical atmospheric conditions according to International Standards Organization (ISO) 9613 -“Attenuation of sound during propagation outdoors.” Inputs to the CadnaA model included topography, ground type, existing and proposed building footprints, and receptor locations. Sound power level data for each of the project on-site noise sources was used as direct inputs to the CadnaA Noise Prediction Model. A discussion of each of the project noise sources and noise level data is provided below. Parking Lot Noise Parking lot noise typically includes periods of conversation, doors slamming, engines starting and stopping and vehicle passage. j.c. brennan & associates, Inc. file data for parking lot activities was used to model the parking lot noise environment for the project site. An average sound exposure level (SEL) of 71 dB at a distance of 50 feet was used to represent parking lot arrivals and departures. AM and PM peak hour project trip generations were provided by Fehr & Peers. The traffic analysis indicates that the peak hour trip generation is 208 (PM peak hour) for the medical office building. Based upon these trip generation rates, the peak hour Leq value for each parking area can be calculated as follows:

Leq = SEL + 10 log Neq - 35.6, dB where: SEL is the mean SEL of the event, Neq is the sum of the number of hourly events, and 35.6 is 10 times the logarithm of the number of seconds in an hour. Based upon the above formula, the hourly Leq for the medical office building parking lot activity would be 58.6 dBA Leq at a distance of 50 feet for daily operations. Table 14 summarizes the estimated project noise generation.

2 DataKustik, CadnaA State of the Art Noise Prediction Software, Greifenberg Germany, 2009



Page 40

Mechanical Equipment Noise At this time detailed information on the project’s mechanical equipment is not available. However, based upon the size and use of the building, the proposed medical office building would likely include the use of rooftop-mounted heating, ventilation, and air-conditioning (HVAC) equipment. It is estimated that several packaged HVAC units would be used to provide approximately 200 tons of cooling capacity to the building. For the purpose of this analysis, it was assumed that four 50-ton HVAC units would be used. The packaged rooftop units used in this analysis are the Lennox Energence Rooftop 50 ton LCH/LGH units having a sound power level of 91.0 dBA with all compressors operating, or a total sound power level of 97.0 dBA for all units operating. Table 14 summarizes the estimated project noise levels which were used in the CadnaA sound prediction model.

Table 14: Project Noise Source Sound Power Levels – Medical Office Building Site

Location Noise Source Total Hourly Leq/L50 at

50 feet Sound Power Level

Typical Weekday Operations

Parking Lot Activity Vehicle circulation, car doors

shutting, car alarm beeps (208 vehicle trips)

58.6 dBA 90.3 dBA

Mechanical Equipment

Rooftop HVAC Operating 65.3 dBA 97.0 dBA

Medical Office Building (Fountain Square Site) Predicted Noise Levels The Table 14 data was used with the CadnaA sound prediction model to calculate the potential noise exposure of the project at the nearest noise-sensitive receptors. The predicted project-generated noise contours for daily operations are shown on Figure 8. Based upon the Figure 8 data, the project is predicted to generate exterior noise levels between 40-43 dBA L50 at the nearest residential receptors located around the project site. This complies with the City’s 55 dBA exterior noise level standard. Therefore, this impact would be less than significant under CEQA checklist threshold (a). Additionally, the increase in ambient (L50) noise levels is predicted to be 1 dBA, or less. This would be less than the FICON substantial increase criteria outlined above. Therefore, this would be a less than significant impact relative to the CEQA checklist threshold (c).


None Required

Legend


: 50-55 dBA

: 55-60 dBA

: 60-65 dBA

Figure Prepared December 2014


and Medical Office Building ProjectFigure 8: Medical Office Building Noise Contours

(Typical Operations)

55-60 dBA60-65 dBA



Total = 63.0

Increase = 0.0 dBA HVAC1 HVAC2

HVAC4HVAC3

Greenback Lane

Fo

un

tain

Sq

uar

e D

rive



Total = 50.0

Increase = 1.0 dBA

50-55 dBA



Page 42

CUMULATIVE IMPACTS AND MITIGATION MEASURES

Impact 5 Cumulative Noise Traffic Noise Cumulative noise impacts would occur primarily as a result of increased traffic on local roadways due to the Proposed Project. Tables 11 and 12 above show cumulative traffic noise levels with and without the Proposed Project. As shown, the Proposed Project would contribute no more than 1.1 dB Ldn to noise levels on roadways fronting residential uses along the study area roadways under cumulative conditions. This increase is less than the 5 dB threshold of significance where exterior noise levels are less than 60 dB. Additionally, the proposed project is not predicted to cause any new exceedances of the City’s 60 dB Ldn exterior noise level standard for sensitive residential uses. Therefore, this impact would be less than significant under CEQA checklist threshold (a) and (c). Non-Traffic Noise The Proposed Project is expected to create noise due to on-site activities due to operation and construction of the project. On site parking, outdoor use areas, and mechanical equipment are predicted to comply with the City of Citrus Heights General Plan Noise Element and Noise Ordinance standards. Construction activities would comply with the requirements of the City of Citrus Heights with respect to hours of operation and muffling of noise-generating equipment. Therefore, this impact would be less than significant under CEQA checklist threshold (a). Increases in existing ambient noise levels are predicted to be less than the outlined tests of significance for transportation noise sources. Noise associated with special events is predicted to result in an increase in ambient noise levels at existing residential receptors that may occasionally exceed the City’s Noise Ordinance limits. However, Section 34-88 of the City’s Noise Ordinance specifically exempts noise associated with City-licensed or permitted events from the City’s Noise Ordinance. Therefore, this would be a less than significant impact.


None Required

Appendix A Acoustical Terminology

Acoustics The science of sound.

Ambient Noise The distinctive acoustical characteristics of a given space consisting of all noise sources audible at that location. In many cases, the term ambient is used to describe an existing or pre-project condition such as the setting in an environmental noise study.

Attenuation The reduction of an acoustic signal.

A-Weighting A frequency-response adjustment of a sound level meter that conditions the output signal to approximate human response.

Decibel or dB Fundamental unit of sound, A Bell is defined as the logarithm of the ratio of the sound pressure squared over the reference pressure squared. A Decibel is one-tenth of a Bell.

CNEL Community Noise Equivalent Level. Defined as the 24-hour average noise level with noise occurring during evening hours (7 - 10 p.m.) weighted by a factor of three and nighttime hours weighted by a factor of 10 prior to averaging.

Frequency The measure of the rapidity of alterations of a periodic signal, expressed in cycles per second or hertz (Hz).

Ldn Day/Night Average Sound Level. Similar to CNEL but with no evening weighting.

Leq Equivalent or energy-averaged sound level.

Lmax The highest root-mean-square (RMS) sound level measured over a given period of time.

L(n) The sound level exceeded a described percentile over a measurement period. For instance, an hourly L50 is the sound level exceeded 50% of the time during the one hour period.

Loudness A subjective term for the sensation of the magnitude of sound. Noise Unwanted sound.

NRC Noise Reduction Coefficient. NRC is a single-number rating of the sound-absorption of a material equal to the arithmetic mean of the sound-absorption coefficients in the 250, 500, 1000, and 2,000 Hz octave frequency bands rounded to the nearest multiple of 0.05. It is a representation of the amount of sound energy absorbed upon striking a particular surface. An NRC of 0 indicates perfect reflection; an NRC of 1 indicates perfect absorption.

Peak Noise The level corresponding to the highest (not RMS) sound pressure measured over a given period of time. This term is often confused with the AMaximum@ level, which is the highest RMS level.

RT60 The time it takes reverberant sound to decay by 60 dB once the source has been removed.

Sabin The unit of sound absorption. One square foot of material absorbing 100% of incident sound has an absorption of 1 Sabin.

SEL Sound Exposure Level. SEL is s rating, in decibels, of a discrete event, such as an aircraft flyover or train passby, that compresses the total sound energy into a one-second event.

STC Sound Transmission Class. STC is an integer rating of how well a building partition attenuates airborne sound. It is widely used to rate interior partitions, ceilings/floors, doors, windows and exterior wall configurations.

Threshold The lowest sound that can be perceived by the human auditory system, generally considered to be 0 dB for of Hearing persons with perfect hearing.

Threshold Approximately 120 dB above the threshold of hearing. of Pain Impulsive Sound of short duration, usually less than one second, with an abrupt onset and rapid decay. Simple Tone Any sound which can be judged as audible as a single pitch or set of single pitches.

Appendix B

Hour Leq Lmax L50 L9012:00 64 78 63 5513:00 65 80 63 56 High Low Average High Low Average14:00 65 81 63 55 Leq (Average) 65 63 65 64 54 6015:00 65 85 63 56 Lmax (Maximum) 86 75 80 84 74 7816:00 65 78 63 55 L50 (Median) 64 59 63 61 42 5117:00 65 75 64 56 L90 (Background) 56 48 54 49 35 4118:00 65 83 64 5619:00 64 75 62 54 Computed Ldn, dB 6720:00 64 85 61 51 % Daytime Energy 84%21:00 63 80 59 48 % Nighttime Energy 16%22:00 62 84 57 4623:00 59 77 54 410:00 57 80 48 391:00 55 74 44 382:00 54 75 44 373:00 54 77 42 354:00 57 77 47 365:00 61 76 57 446:00 64 80 61 497:00 65 80 64 548:00 65 81 64 559:00 65 77 62 5210:00 64 78 63 5411:00 65 86 63 55

Statistical SummaryNighttime (10 p.m. - 7 a.m.)

2014-188 Citrus Heights City Hall Relocation24hr Continuous Noise Monitoring - Meter 3 - Site LT-A

Daytime (7 a.m. - 10 p.m.)

9/23/14 - 9/24/2014

Ldn = 67 dB

2014-188 Citrus Heights City Hall Relocation24hr Continuous Noise Monitoring - Meter 3 - Site LT-A

9/23/14 - 9/24/2014

Appendix B

30

40

50

60

70

80

90

100

12 PM 4 PM 8 PM 12 AM 4 AM 8 AM

Hour of Day

So

un

d L

evel

, d

B

Leq Lmax L50

Appendix B


2014-188 Citrus Heights City Hall Relocation24hr Continuous Noise Monitoring - Meter Heavenly - Site LT-B


9/23/14 - 9/24/2014


Ldn = 55 dB

2014-188 Citrus Heights City Hall Relocation24hr Continuous Noise Monitoring - Meter Heavenly - Site LT-B

9/23/14 - 9/24/2014

Appendix B

30

40

50

60

70

80

90

100

12 PM 4 PM 8 PM 12 AM 4 AM 8 AM

Hour of Day

So

un

d L

evel

, d

B

Leq Lmax L50

Appendix B


2014-188 Citrus Heights City Hall Relocation24hr Continuous Noise Monitoring - Meter 2 - Site LT-C


9/23/14 - 9/24/2014


Ldn = 53 dB

2014-188 Citrus Heights City Hall Relocation24hr Continuous Noise Monitoring - Meter 2 - Site LT-C

9/23/14 - 9/24/2014

Appendix B

30

40

50

60

70

80

90

100

12 PM 4 PM 8 PM 12 AM 4 AM 8 AM

Hour of Day

So

un

d L

evel

, d

B

Leq Lmax L50

Appendix B


2014-188 Citrus Heights City Hall Relocation24hr Continuous Noise Monitoring - Meter 1 - Site LT-D


9/23/14 - 9/24/2014


Ldn = 57 dB

2014-188 Citrus Heights City Hall Relocation24hr Continuous Noise Monitoring - Meter 1 - Site LT-D

9/23/14 - 9/24/2014

Appendix B

30

40

50

60

70

80

90

100

110

1 PM 5 PM 9 PM 1 AM 5 AM 9 AM

Hour of Day

So

un

d L

evel

, d

B

Leq Lmax L50

Project #:Description:Ldn/CNEL: LdnHard/Soft: Soft

Segment Roadway Name Segment Description ADT Day % Eve % Night %% Med. Trucks

% Hvy. Trucks Speed Distance

Offset (dB)

1 Greenback Ln. West of Van Maren Ln. 35,370 84 16 2 1 40 60 -52 Greenback Ln. Van Maren Ln. to Boorktree Dr. 36,290 84 16 2 1 40 70 -53 Greenback Ln. Brooktree Dr. to City Hall Dwy. 35,160 84 16 2 1 40 60 -54 Greenback Ln. City Hall Dwy. to Fountain Square Dr. 35,030 84 16 2 1 40 165 -55 Greenback Ln. Fountain Square Dr. to San Juan Ave. 34,200 84 16 2 1 40 75 -56 Greenback Ln. East of San Juan Ave. 33,890 84 16 2 1 40 75 -57 Stock Ranch Rd. West of Fountain Square Dr. 980 83 16 0.5 0.5 30 55 -58 Stock Ranch Rd. Fountain Square Dr. to Sylvan Rd. 2,700 83 16 0.5 0.5 30 50 -59 Fountain Square Dr. Greenback to City Center Dwy. 5,320 89 16 1 0.5 30 380 -510 Fountain Square Dr. City Hall Dwy. To Post Office Dwy. 4,700 89 16 1 0.5 30 405 -511 Fountain Square Dr. Post Office Way. To Stock Ranch Rd 2,780 89 16 1 0.5 30 50 -512 Van Maren Ln North of GreenBack Ln. 12,660 83 16 2 0.5 35 60 013 Dewey Dr. South of Greenback Ln. 17,870 83 16 2 1 35 75 014 Sylvan Rd. Greenback to Stock Ranch Rd. 18,520 83 16 2 1 40 170 015 Sylvan Rd. North of Stock Ranch Rd. 22,630 83 16 2 1 40 60 -516 San Juan Ave South of Greenback Ln. 18,990 83 16 2 1 40 75 0

Appendix C

2014-188 City Hall Relocation & Medical Building

FHWA-RD-77-108 Highway Traffic Noise Prediction Model

Existing

Data Input Sheet

Project #:Description:Ldn/CNEL:Hard/Soft:

Medium HeavySegment Roadway Name Autos Trucks Trucks Total

1 Greenback Ln. 64.0 56.1 57.9 65.52 Greenback Ln. 63.1 55.2 57.0 64.63 Greenback Ln. 64.0 56.0 57.8 65.44 Greenback Ln. 57.4 49.4 51.2 58.85 Greenback Ln. 62.4 54.5 56.3 63.96 Greenback Ln. 62.3 54.4 56.2 63.87 Stock Ranch Rd. 45.4 33.1 40.2 46.88 Stock Ranch Rd. 50.5 38.1 45.2 51.89 Fountain Square Dr. 40.3 30.9 35.0 41.8

10 Fountain Square Dr. 39.3 30.0 34.1 40.811 Fountain Square Dr. 50.7 41.3 45.4 52.212 Van Maren Ln 62.9 55.7 54.8 64.213 Dewey Dr. 62.9 55.7 57.9 64.714 Sylvan Rd. 59.4 51.4 53.3 60.915 Sylvan Rd. 62.0 54.1 55.9 63.516 San Juan Ave 64.8 56.9 58.7 66.3

South of Greenback Ln.Greenback to Stock Ranch Rd.North of Stock Ranch Rd.South of Greenback Ln.

West of Van Maren Ln.Van Maren Ln. to Boorktree Dr.Brooktree Dr. to City Hall Dwy.City Hall Dwy. to Fountain Square Dr.Fountain Square Dr. to San Juan AveEast of San Juan Ave.West of Fountain Square Dr.Fountain Square Dr. to Sylvan Rd.Greenback to City Center Dwy.City Hall Dwy. To Post Office Dwy.Post Office Way. To Stock Ranch RdNorth of GreenBack Ln.

Existing

Segment Description

FHWA-RD-77-108 Highway Traffic Noise Prediction ModelPredicted Levels

Appendix C


LdnSoft


Segment Roadway Name 75 70 65 60 55

1 Greenback Ln. 14 30 64 139 2992 Greenback Ln. 14 30 66 141 3043 Greenback Ln. 14 30 64 138 2984 Greenback Ln. 14 30 64 138 2975 Greenback Ln. 14 29 63 136 2926 Greenback Ln. 13 29 63 135 2917 Stock Ranch Rd. 1 2 3 7 168 Stock Ranch Rd. 1 3 7 14 319 Fountain Square Dr. 2 5 11 23 50

10 Fountain Square Dr. 2 5 10 21 4611 Fountain Square Dr. 2 3 7 15 3212 Van Maren Ln 11 24 53 114 24513 Dewey Dr. 15 33 71 154 33114 Sylvan Rd. 19 42 90 194 41715 Sylvan Rd. 10 22 48 103 22116 San Juan Ave 20 42 91 197 424


West of Van Maren Ln.Van Maren Ln. to Boorktree Dr.Brooktree Dr. to City Hall Dwy.City Hall Dwy. to Fountain Square DrFountain Square Dr. to San Juan AveEast of San Juan Ave.West of Fountain Square Dr.Fountain Square Dr. to Sylvan Rd.Greenback to City Center Dwy.City Hall Dwy. To Post Office Dwy.Post Office Way. To Stock Ranch RdNorth of GreenBack Ln.

FHWA-RD-77-108 Highway Traffic Noise Prediction ModelNoise Contour Output

Appendix C

2014-188 City Hall Relocation & Medical BuildingExisting

Segment Description-------- Distances to Traffic Noise Contours --------

LdnSoft




Offset (dB)

1 Greenback Ln. West of Van Maren Ln. 36,100 84 16 2 1 40 60 -52 Greenback Ln. Van Maren Ln. to Boorktree Dr. 37,330 84 16 2 1 40 70 -53 Greenback Ln. Brooktree Dr. to City Hall Dwy. 36,240 84 16 2 1 40 60 -54 Greenback Ln. City Hall Dwy. to Fountain Square Dr. 36,090 84 16 2 1 40 165 -55 Greenback Ln. Fountain Square Dr. to San Juan Ave. 34,940 84 16 2 1 40 75 -56 Greenback Ln. East of San Juan Ave. 34,210 84 16 2 1 40 75 -57 Stock Ranch Rd. West of Fountain Square Dr. 1,020 83 16 0.5 0.5 30 55 -58 Stock Ranch Rd. Fountain Square Dr. to Sylvan Rd. 2,850 83 16 0.5 0.5 30 50 -59 Fountain Square Dr. Greenback to City Center Dwy. 6,720 89 16 1 0.5 30 380 -510 Fountain Square Dr. City Hall Dwy. To Post Office Dwy. 5,130 89 16 1 0.5 30 405 -511 Fountain Square Dr. Post Office Way. To Stock Ranch Rd 3,210 89 16 1 0.5 30 50 -512 Van Maren Ln North of GreenBack Ln. 12,760 83 16 2 0.5 35 60 013 Dewey Dr. South of Greenback Ln. 18,080 83 16 2 1 35 75 014 Sylvan Rd. Greenback to Stock Ranch Rd. 18,740 83 16 2 1 40 170 015 Sylvan Rd. North of Stock Ranch Rd. 23,000 83 16 2 1 40 60 -516 San Juan Ave South of Greenback Ln. 19,150 83 16 2 1 40 75 0

Appendix C



Existing + Project

Data Input Sheet







Existing + Project

Segment Description


Appendix C


LdnSoft








Appendix C

2014-188 City Hall Relocation & Medical BuildingExisting + Project


LdnSoft




Offset (dB)


Appendix C



Cumulative No Development

Data Input Sheet







Cumulative No Development

Segment Description


Appendix C


LdnSoft








Appendix C

2014-188 City Hall Relocation & Medical BuildingCumulative No Development


LdnSoft




Offset (dB)


Appendix C



Cumulative Existing Zoning

Data Input Sheet





Appendix C


LdnSoft


Segment Description


Greenback to City Center Dwy.City Hall Dwy. To Post Office Dwy.Post Office Way. To Stock Ranch RdNorth of GreenBack Ln.

Fountain Square Dr. to San Juan AveEast of San Juan Ave.West of Fountain Square Dr.Fountain Square Dr. to Sylvan Rd.

West of Van Maren Ln.Van Maren Ln. to Boorktree Dr.Brooktree Dr. to City Hall Dwy.City Hall Dwy. to Fountain Square Dr.








LdnSoft


Appendix C




West of Van Maren Ln.Van Maren Ln. to Boorktree Dr.Brooktree Dr. to City Hall Dwy.City Hall Dwy. to Fountain Square Dr





Offset (dB)

1 Greenback Ln. West of Van Maren Ln. 45,380 84 16 2 1 40 60 -52 Greenback Ln. Van Maren Ln. to Boorktree Dr. 42,300 84 16 2 1 40 70 -53 Greenback Ln. Brooktree Dr. to City Hall Dwy. 41,260 84 16 2 1 40 60 -54 Greenback Ln. City Hall Dwy. to Fountain Square Dr. 41,110 84 16 2 1 40 165 -55 Greenback Ln. Fountain Square Dr. to San Juan Ave. 39,820 84 16 2 1 40 75 -56 Greenback Ln. East of San Juan Ave. 41,140 84 16 2 1 40 75 -57 Stock Ranch Rd. West of Fountain Square Dr. 1,020 83 16 0.5 0.5 30 55 -58 Stock Ranch Rd. Fountain Square Dr. to Sylvan Rd. 3,040 83 16 0.5 0.5 30 50 -59 Fountain Square Dr. Greenback to City Center Dwy. 6,910 89 16 1 0.5 30 380 -510 Fountain Square Dr. City Hall Dwy. To Post Office Dwy. 5,320 89 16 1 0.5 30 405 -511 Fountain Square Dr. Post Office Way. To Stock Ranch Rd 3,400 89 16 1 0.5 30 50 -512 Van Maren Ln North of GreenBack Ln. 16,070 83 16 2 0.5 35 60 013 Dewey Dr. South of Greenback Ln. 21,940 83 16 2 1 35 75 014 Sylvan Rd. Greenback to Stock Ranch Rd. 21,790 83 16 2 1 40 170 015 Sylvan Rd. North of Stock Ranch Rd. 26,080 83 16 2 1 40 60 -516 San Juan Ave South of Greenback Ln. 21,540 83 16 2 1 40 75 0

Appendix C



Cumulative Plus Project

Data Input Sheet





Appendix C


LdnSoft


Segment Description




West of Van Maren Ln.Van Maren Ln. to Boorktree Dr.Brooktree Dr. to City Hall Dwy.City Hall Dwy. to Fountain Square Dr.








LdnSoft


Appendix C




West of Van Maren Ln.Van Maren Ln. to Boorktree Dr.Brooktree Dr. to City Hall Dwy.City Hall Dwy. to Fountain Square Dr


Documents

Impact 1 Impact 2 Impact 3 Impact 4