APPENDIX G
NOISE DATA
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Fundamentals of Noise
NOISE
Noise is most often defined as unwanted sound; whether it is loud, unpleasant, unexpected, or otherwise undesirable. Although sound can be easily measured, the perception of noise and the physical response to sound complicate the analysis of its impact on people. People judge the relative magnitude of sound sensation in subjective terms such as “noisiness” or “loudness.”
Noise Descriptors
The following are brief definitions of terminology used in this chapter:
▪ Sound. A disturbance created by a vibrating object, which, when transmitted by pressure waves through a medium such as air, is capable of being detected by a receiving mechanism, such as the human ear or a microphone.
▪ Noise. Sound that is loud, unpleasant, unexpected, or otherwise undesirable. ▪ Decibel (dB). A unitless measure of sound, expressed on a logarithmic scale and with respect to a defined reference sound pressure. The standard reference pressure is 20 micropascals (20 µPa). ▪ Vibration Decibel (VdB). A unitless measure of vibration, expressed on a logarithmic scale and with respect to a defined reference vibration velocity. In the U.S., the standard reference velocity is 1 microinch per second (1x10-6 in/sec).
▪ A-Weighted Decibel (dBA). An overall frequency-weighted sound level in decibels that approximates the frequency response of the human ear.
▪ Equivalent Continuous Noise Level (Leq); also called the Energy-Equivalent Noise Level. The value of an equivalent, steady sound level which, in a stated time period (often over an hour) and at a stated location, has the same A-weighted sound energy as the time-varying sound. Thus, the Leq metric is a single numerical value that represents the equivalent amount of variable sound energy received by a receptor over the specified duration.
▪ Statistical Sound Level (Ln). The sound level that is exceeded “n” percent of time during a given sample period. For example, the L50 level is the statistical indicator of the time-varying noise signal that is exceeded 50 percent of the time (during each sampling period); that is, half of the sampling time, the changing noise levels are above this value and half of the time they are below it. This is called the “median sound level.” The L10 level, likewise, is the value that is exceeded 10 percent of the time (i.e., near the maximum) and this is often known as the “intrusive sound level.” The L90 is the sound level exceeded 90 percent of the time and is often considered the “effective background level” or “residual noise level.”
▪ Maximum Sound Level (Lmax). The highest RMS sound level measured during the measurement period.
▪ Root Mean Square Sound Level (RMS). The square root of the average of the square of the sound pressure over the measurement period.
▪ Day-Night Sound Level (Ldn or DNL). The energy-average of the A-weighted sound levels occurring during a 24-hour period, with 10 dB added to the sound levels occurring during the period from 10:00 PM to 7:00 AM.
▪ Community Noise Equivalent Level (CNEL). The energy average of the A-weighted sound levels occurring during a 24-hour period, with 5 dB added from 7:00 PM to 10:00 PM and 10 dB from 10:00 PM to 7:00 AM. NOTE: For general community/environmental noise, CNEL and Ldn values rarely differ by more than 1 dB (with the CNEL being only slightly more restrictive – that is, higher than the Ldn value). As a matter of practice, Ldn and CNEL values are interchangeable and are treated as equivalent in this assessment.
▪ Peak Particle Velocity (PPV). The peak rate of speed at which soil particles move (e.g., inches per second) due to ground vibration.
▪ Sensitive Receptor. Noise- and vibration-sensitive receptors include land uses where quiet environments are necessary for enjoyment and public health and safety. Residences, schools, motels and hotels, libraries, religious institutions, hospitals, and nursing homes are examples.
Characteristics of Sound
When an object vibrates, it radiates part of its energy in the form of a pressure wave. Sound is that pressure wave transmitted through the air. Technically, airborne sound is a rapid fluctuation or oscillation of air pressure above and below atmospheric pressure that creates sound waves.
Sound can be described in terms of amplitude (loudness), frequency (pitch), or duration (time). Loudness or amplitude is measured in dB, frequency or pitch is measured in Hertz [Hz] or cycles per second, and duration or time variations is measured in seconds or minutes.
Amplitude
Unlike linear units such as inches or pounds, decibels are measured on a logarithmic scale. Because of the physical characteristics of noise transmission and perception, the relative loudness of sound does not closely match the actual amounts of sound energy. Table 1 presents the subjective effect of changes in sound pressure levels. Ambient sounds generally range from 30 dBA (very quiet) to 100 dBA (very loud). Changes of 1 to 3 dB are detectable under quiet, controlled conditions, and changes of less than 1 dB are usually not discernible (even under ideal conditions). A 3 dB change in noise levels is considered the minimum change that is detectable with human hearing in outside environments. A change of 5 dB is readily discernible to most people in an exterior environment, and a 10 dB change is perceived as a doubling (or halving) of the sound.
Table 1 Noise Perceptibility
Change in dB Noise Level
± 3 dB Barely perceptible increase
± 5 dB Readily perceptible increase
± 10 dB Twice or half as loud
± 20 dB Four times or one-quarter as loud
Source: California Department of Transportation (Caltrans). 2013, September. Technical Noise Supplement (“TeNS”).
Frequency
The human ear is not equally sensitive to all frequencies. Sound waves below 16 Hz are not heard at all, but are “felt” more as a vibration. Similarly, though people with extremely sensitive hearing can hear sounds as high as 20,000 Hz, most people cannot hear above 15,000 Hz. In all cases, hearing acuity falls off rapidly above about 10,000 Hz and below about 200 Hz.
When describing sound and its effect on a human population, A-weighted (dBA) sound levels are typically used to approximate the response of the human ear. The A-weighted noise level has been found to correlate well with people’s judgments of the “noisiness” of different sounds and has been used for many years as a measure of community and industrial noise. Although the A-weighted scale and the energy-equivalent metric are commonly used to quantify the range of human response to individual events or general community sound levels, the degree of annoyance or other response also depends on several other perceptibility factors, including:
▪ Ambient (background) sound level
▪ General nature of the existing conditions (e.g., quiet rural or busy urban) ▪ Difference between the magnitude of the sound event level and the ambient condition ▪ Duration of the sound event
▪ Number of event occurrences and their repetitiveness
▪ Time of day that the event occurs
Duration
Time variation in noise exposure is typically expressed in terms of a steady-state energy level equal to the energy content of the time varying period (called Leq), or alternately, as a statistical description of the sound level that is exceeded over some fraction of a given observation period. For example, the L50 noise level represents the noise level that is exceeded 50 percent of the time; half the time the noise level exceeds this level and half the time the noise level is less than this level. This level is also representative of the level that is exceeded 30 minutes in an hour. Similarly, the L2, L8 and L25 values represent the noise levels that are exceeded 2, 8, and 25 percent of the time or 1, 5, and 15 minutes per hour, respectively. These “n” values are typically used to demonstrate compliance for stationary noise sources with many cities’ noise ordinances.
Other values typically noted during a noise survey are the Lmin and Lmax. These values represent the minimum and maximum root-mean-square noise levels obtained over the measurement period, respectively.
Because community receptors are more sensitive to unwanted noise intrusion during the evening and at night, state law and many local jurisdictions use an adjusted 24-hour noise descriptor called the Community Noise Equivalent Level (CNEL) or Day-Night Noise Level (Ldn). The CNEL descriptor requires that an artificial increment (or “penalty”) of 5 dBA be added to the actual noise level for the hours from 7:00 PM to 10:00 PM and 10 dBA for the hours from 10:00 PM to 7:00 AM. The Ldn descriptor uses the same methodology except that there is no artificial increment added to the hours between 7:00 PM and 10:00 PM. Both descriptors give roughly the same 24-hour level, with the CNEL being only slightly more restrictive (i.e., higher). The CNEL or Ldn metrics are commonly applied to the assessment of roadway and airport-related noise sources.
Sound Propagation
Sound dissipates exponentially with distance from the noise source. This phenomenon is known as “spreading loss.” For a single-point source, sound levels decrease by approximately 6 dB for each doubling of distance from the source (conservatively neglecting ground attenuation effects, air absorption factors, and barrier shielding). For example, if a backhoe at 50 feet generates 84 dBA, at 100 feet the noise level would be 79 dBA, and at 200 feet it would be 73 dBA. This drop-off rate is appropriate for noise generated by on-site operations from stationary equipment or activity at a project site. If noise is produced by a line source, such as highway traffic, the sound decreases by 3 dB for each doubling of distance over a reflective (“hard site”) surface such as concrete or asphalt. Line source noise in a relatively flat environment with ground-level absorptive vegetation decreases by an additional 1.5 dB for each doubling of distance.
Psychological and Physiological Effects of Noise
Physical damage to human hearing begins at prolonged exposure to noise levels higher than 85 dBA.
Exposure to high noise levels affects the entire system, with prolonged noise exposure in excess of 75 dBA increasing body tensions, thereby affecting blood pressure and functions of the heart and the nervous system.
Extended periods of noise exposure above 90 dBA results in permanent cell damage, which is the main driver for employee hearing protection regulations in the workplace. For community environments, the ambient or background noise problem is widespread, through generally worse in urban areas than in outlying, lessdeveloped areas. Elevated ambient noise levels can result in noise interference (e.g., speech interruption/masking, sleep disturbance, disturbance of concentration) and cause annoyance. Since most people do not routinely work with decibels or A-weighted sound levels, it is often difficult to appreciate what a given sound pressure level number means. To help relate noise level values to common experience, Table 2 shows typical noise levels from familiar sources.
Table 2 Typical Noise Levels
Common Outdoor Activities
Noise Level
(dBA) Common Indoor Activities
Onset of physical discomfort 120+
110 Rock Band (near amplification system)
Jet Flyover at 1,000 feet
100
Gas Lawn Mower at three feet
90 Diesel Truck at 50 feet, at 50 mph Food Blender at 3 feet 80 Garbage Disposal at 3 feet
Noisy Urban Area, Daytime
70 Vacuum Cleaner at 10 feet
Commercial Area Normal speech at 3 feet
Heavy Traffic at 300 feet 60
Large Business Office
Quiet Urban Daytime 50 Dishwasher Next Room
Quiet Urban Nighttime 40 Theater, Large Conference Room (background) Quiet Suburban Nighttime
30 Library
Quiet Rural Nighttime Bedroom at Night, Concert Hall (background) 20 Broadcast/Recording Studio
10 Lowest Threshold of Human Hearing 0 Lowest Threshold of Human Hearing Source: California Department of Transportation (Caltrans). 2013, September. Technical Noise Supplement (“TeNS”).
Vibration Fundamentals
Vibration is an oscillatory motion through a solid medium in which the motion’s amplitude can be described in terms of displacement, velocity, or acceleration. Vibration is normally associated with activities stemming from operations of railroads or vibration-intensive stationary sources, but can also be associated with construction equipment such as jackhammers, pile drivers, and hydraulic hammers. As with noise, vibration can be described by both its amplitude and frequency. Vibration displacement is the distance that a point on a surface moves away from its original static position; velocity is the instantaneous speed that a point on a surface moves; and acceleration is the rate of change of the speed. Each of these descriptors can be used to correlate vibration to human response, building damage, and acceptable equipment vibration levels. During construction, the operation of construction equipment can cause groundborne vibration. During the operational phase of a project, receptors may be subject to levels of vibration that can cause annoyance due to noise generated from vibration of a structure or items within a structure.
Vibration amplitudes are usually described in terms of either the peak particle velocity (PPV) or the root mean square (RMS) velocity. PPV is the maximum instantaneous peak of the vibration signal and RMS is the square root of the average of the squared amplitude of the signal. PPV is more appropriate for evaluating potential building damage and RMS is typically more suitable for evaluating human response.
As with airborne sound, annoyance with vibrational energy is a subjective measure, depending on the level of activity and the sensitivity of the individual. To sensitive individuals, vibrations approaching the threshold of perception can be annoying. Persons accustomed to elevated ambient vibration levels, such as in an urban environment, may tolerate higher vibration levels. Table 3 displays the human response and the effects on buildings resulting from continuous vibration (in terms of various levels of PPV).
Table 3 Human Reaction to Typical Vibration Levels
Vibration Level,
PPV (in/sec) Human Reaction Effect on Buildings
0.006–0.019 Threshold of perception, possibility of intrusion Vibrations unlikely to cause damage of any type
0.08 Vibrations readily perceptible Recommended upper level of vibration to which ruins and ancient monuments should be subjected
0.10 Level at which continuous vibration begins to annoy people
Virtually no risk of “architectural” (i.e. not structural) damage to normal buildings
0.20 Vibrations annoying to people in buildings
Threshold at which there is a risk to “architectural”
damage to normal dwelling – houses with plastered
walls and ceilings
0.4–0.6
Vibrations considered unpleasant by people
subjected to continuous vibrations and unacceptable
to some people walking on bridges
Vibrations at a greater level than normally expected
from traffic, but would cause “architectural” damage
and possibly minor structural damage
Source: California Department of Transportation (Caltrans). 2020, April. Transportation and Construction Vibration Guidance Manual. Prepared by ICF International. ........................................................................................................................
C ONSTRUCTION M ODELING R ESULTS
TYOU-03.0 - Construction Noise Modeling Attenuation Calculations Phase Exterior Interior Exterior Interior Exterior Interior Exterior Interior Distance in feet 50 185 210 225 225 250 265 135 150
Demolition 85 74 53 72 52 71 51 76 55Site Prep 83 72 51 70 50 69 49 74 53Grading 84 73 52 71 51 70 50 75 54 Distance in feet 50 75 100 105 105 110 125 105 120
Building Construction 78 74 52 72 52 71 50 72 50
Architectural Coating 74 70 48 68 48 67 46 68 46
Distance in feet 50 90 115 100 100 110 125 100 115
Paving 79 74 52 73 53 72 51 73 52
Distance in feet 50 100 125 95 95 135 150 95 110
Finish/Landscaping 80 74 52 74 54 71 50 74 53
RCNM Reference Single-Family Receptor to West
Noise Level
Attenuation calculated through Inverse Square Law: Lp(R2) = Lp(R1) - 20Log(R2/R1) Townhouse Receptor to
East
Multi-Family/Hotel
Receptor to South
Multi-Family Receptor to
North
Roadway Construction Noise Model (RCNM),Version 1.1
Report date: 09/04/2025Case Description: TYOU-03.0 Demolition **** Receptor #1 **** Baselines (dBA)Description Land Use Daytime Evening Night----------- -------- ------- ------- -----Receptor at 50 ft Residential 65.0 60.0 55.0 Equipment --------- Spec Actual Receptor Estimated Impact Usage Lmax Lmax Distance ShieldingDescription Device (%) (dBA) (dBA) (feet) (dBA)----------- ------ ----- ----- ----- -------- ---------Concrete Saw No 20 89.6 50.0 0.0Excavator No 40 80.7 50.0 0.0Dozer No 40 81.7 50.0 0.0 Results ------- Noise Limits (dBA) Noise Limit Exceedance (dBA) ---------------------------------------------- ---------------------------------------------- Calculated (dBA) Day Evening Night Day Evening Night ---------------- -------------- ------------- -------------- -------------- -------------- --------------Equipment Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq---------------------- ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ ------Concrete Saw 89.6 82.6 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/AExcavator 80.7 76.7 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/ADozer 81.7 77.7 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Total 89.6 84.6 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Roadway Construction Noise Model (RCNM),Version 1.1
Report date: 09/04/2025Case Description: TYOU-03.0 Site Preparation **** Receptor #1 **** Baselines (dBA)Description Land Use Daytime Evening Night----------- -------- ------- ------- -----Receptor at 50 ft Residential 65.0 60.0 55.0 Equipment --------- Spec Actual Receptor Estimated Impact Usage Lmax Lmax Distance ShieldingDescription Device (%) (dBA) (dBA) (feet) (dBA)----------- ------ ----- ----- ----- -------- ---------Front End Loader No 40 79.1 50.0 0.0Backhoe No 40 77.6 50.0 0.0Dozer No 40 81.7 50.0 0.0 Results ------- Noise Limits (dBA) Noise Limit Exceedance (dBA) ---------------------------------------------- ---------------------------------------------- Calculated (dBA) Day Evening Night Day Evening Night ---------------- -------------- ------------- -------------- -------------- -------------- --------------Equipment Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq---------------------- ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ ------Front End Loader 79.1 75.1 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/ABackhoe 77.6 73.6 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/ADozer 81.7 77.7 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Total 81.7 80.6 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Roadway Construction Noise Model (RCNM),Version 1.1
Report date: 09/04/2025Case Description: TYOU-03.0 Grading **** Receptor #1 **** Baselines (dBA)Description Land Use Daytime Evening Night----------- -------- ------- ------- -----Receptor at 50 ft Residential 65.0 60.0 55.0 Equipment --------- Spec Actual Receptor Estimated Impact Usage Lmax Lmax Distance ShieldingDescription Device (%) (dBA) (dBA) (feet) (dBA)----------- ------ ----- ----- ----- -------- ---------Grader No 40 85.0 50.0 0.0Excavator No 40 80.7 50.0 0.0Front End Loader No 40 79.1 50.0 0.0 Results ------- Noise Limits (dBA) Noise Limit Exceedance (dBA) ---------------------------------------------- ---------------------------------------------- Calculated (dBA) Day Evening Night Day Evening Night ---------------- -------------- ------------- -------------- -------------- -------------- --------------Equipment Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq---------------------- ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ ------Grader 85.0 81.0 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/AExcavator 80.7 76.7 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/AFront End Loader 79.1 75.1 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Total 85.0 83.1 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Roadway Construction Noise Model (RCNM),Version 1.1
Report date: 09/04/2025Case Description: TYOU-03.0 Building Construction **** Receptor #1 **** Baselines (dBA)Description Land Use Daytime Evening Night----------- -------- ------- ------- -----Receptor at 50 ft Residential 65.0 60.0 55.0 Equipment --------- Spec Actual Receptor Estimated Impact Usage Lmax Lmax Distance ShieldingDescription Device (%) (dBA) (dBA) (feet) (dBA)----------- ------ ----- ----- ----- -------- ---------Front End Loader No 40 79.1 50.0 0.0Generator (<25KVA, VMS signs) No 50 72.8 50.0 0.0Crane No 16 80.6 50.0 0.0 Results ------- Noise Limits (dBA) Noise Limit Exceedance (dBA) ---------------------------------------------- ---------------------------------------------- Calculated (dBA) Day Evening Night Day Evening Night ---------------- -------------- ------------- -------------- -------------- -------------- --------------Equipment Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq---------------------- ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ ------Front End Loader 79.1 75.1 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/AGenerator (<25KVA, VMS signs) 72.8 69.8 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/ACrane 80.6 72.6 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Total 80.6 77.8 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Roadway Construction Noise Model (RCNM),Version 1.1
Report date: 09/04/2025Case Description: TYOU-03.0 Architectural Coating **** Receptor #1 **** Baselines (dBA)Description Land Use Daytime Evening Night----------- -------- ------- ------- -----Receptor at 50 ft Residential 65.0 60.0 55.0 Equipment --------- Spec Actual Receptor Estimated Impact Usage Lmax Lmax Distance ShieldingDescription Device (%) (dBA) (dBA) (feet) (dBA)----------- ------ ----- ----- ----- -------- ---------Compressor (air) No 40 77.7 50.0 0.0 Results ------- Noise Limits (dBA) Noise Limit Exceedance (dBA) ---------------------------------------------- ---------------------------------------------- Calculated (dBA) Day Evening Night Day Evening Night ---------------- -------------- ------------- -------------- -------------- -------------- --------------Equipment Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq---------------------- ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ ------Compressor (air) 77.7 73.7 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Total 77.7 73.7 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Roadway Construction Noise Model (RCNM),Version 1.1
Report date: 09/04/2025Case Description: TYOU-03.0 Paving **** Receptor #1 **** Baselines (dBA)Description Land Use Daytime Evening Night----------- -------- ------- ------- -----Receptor at 50 ft Residential 65.0 60.0 55.0 Equipment --------- Spec Actual Receptor Estimated Impact Usage Lmax Lmax Distance ShieldingDescription Device (%) (dBA) (dBA) (feet) (dBA)----------- ------ ----- ----- ----- -------- ---------Paver No 50 77.2 50.0 0.0Roller No 20 80.0 50.0 0.0Paver No 50 77.2 50.0 0.0 Results ------- Noise Limits (dBA) Noise Limit Exceedance (dBA) ---------------------------------------------- ---------------------------------------------- Calculated (dBA) Day Evening Night Day Evening Night ---------------- -------------- ------------- -------------- -------------- -------------- --------------Equipment Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq---------------------- ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ ------Paver 77.2 74.2 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/ARoller 80.0 73.0 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/APaver 77.2 74.2 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Total 80.0 78.6 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Roadway Construction Noise Model (RCNM),Version 1.1
Report date: 09/04/2025Case Description: TYOU-03.0 Finishing/Landscaping **** Receptor #1 **** Baselines (dBA)Description Land Use Daytime Evening Night----------- -------- ------- ------- -----Receptor at 50 ft Residential 65.0 60.0 55.0 Equipment --------- Spec Actual Receptor Estimated Impact Usage Lmax Lmax Distance ShieldingDescription Device (%) (dBA) (dBA) (feet) (dBA)----------- ------ ----- ----- ----- -------- ---------Excavator No 40 80.7 50.0 0.0 Results ------- Noise Limits (dBA) Noise Limit Exceedance (dBA) ---------------------------------------------- ---------------------------------------------- Calculated (dBA) Day Evening Night Day Evening Night ---------------- -------------- ------------- -------------- -------------- -------------- --------------Equipment Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq---------------------- ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ ------Excavator 80.7 76.7 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Total 80.7 76.7 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A TYOU-03.0 - Vibration Damage Attenuation Calculations
Levels, PPV (in/sec)
Yount Street
Town Hall Receptor to North Receptor to South Receptor to East Receptor to West Distance in feet 10 100 95 48 27
Vibratory Roller 0.21 0.830 0.026 0.028 0.079 0.187Large Bulldozer 0.089 0.352 0.011 0.012 0.033 0.079Caisson Drilling 0.089 0.352 0.011 0.012 0.033 0.079Loaded Trucks 0.076 0.300 0.010 0.010 0.029 0.068Jackhammer 0.035 0.138 0.004 0.005 0.013 0.031Small Bulldozer 0.003 0.012 0.000 0.000 0.001 0.003 Vibration
Reference Level
at 25 feet
........................................................................................................................
T RAFFIC M ODELING R ESULTS
ID Leq-24hr Ldn CNEL 70 dBA 65 dBA 60 dBA Roadway ADT Posted Speed Limit Grade % Autos % Med Trucks % Heavy Trucks % Daytime % Evening % Night Number of Lanes Site Condition Distance to Reciever Ground Absorption Lane Distance 1 51.4 54.2 54.9 5 11 23 Madison Street Yount St the West 1,810 25 0.0% 97.5% 1.5% 1.0% 75.0% 15.0% 10.0% 2 Soft 50 0.5 202 48.5 51.3 51.9 3 7 14 Yount Street Madison St the North 920 25 0.0% 97.5% 1.5% 1.0% 75.0% 15.0% 10.0% 2 Soft 50 0.5 203 51.5 54.3 55.0 5 11 23 Yount Street Madison St Finnel Rd 1,870 25 0.0% 97.5% 1.5% 1.0% 75.0% 15.0% 10.0% 2 Soft 50 0.5 204 50.5 53.3 54.0 4 9 20 Yount Street Finnel Rd Washington St 1,470 25 0.0% 97.5% 1.5% 1.0% 75.0% 15.0% 10.0% 2 Soft 50 0.5 205 45.1 47.8 48.5 2 4 9 Finnel Road Yount St the East 420 25 0.0% 97.5% 1.5% 1.0% 75.0% 15.0% 10.0% 2 Soft 50 0.5 206 53.3 56.1 56.7 7 14 30 Washington Street Yount St the North 2,780 25 0.0% 97.5% 1.5% 1.0% 75.0% 15.0% 10.0% 2 Soft 50 0.5 207 53.3 56.1 56.8 7 14 30 Washington Street Yount St the South 2,790 25 0.0% 97.5% 1.5% 1.0% 75.0% 15.0% 10.0% 2 Soft 50 0.5 20 Auto Inputs
Segment
From - To
Traffic Noise Calculator: FHWA 77-108 Yountville Commons (TYOU-03.0) Existing No Project Traffic Noise Traffic Conditions dBA at 50 feet Distance to CNEL Contour
Output Inputs
ID Leq-24hr Ldn CNEL 70 dBA 65 dBA 60 dBA Roadway ADT Posted Speed Limit Grade % Autos % Med Trucks % Heavy Trucks % Daytime % Evening % Night Number of Lanes Site Condition Distance to Reciever Ground Absorption Lane Distance 1 52.2 55.0 55.7 6 12 26 Madison Street Yount St the West 2,170 25 0.0% 97.5% 1.5% 1.0% 75.0% 15.0% 10.0% 2 Soft 50 0.5 202 50.0 52.8 53.5 4 9 18 Yount Street Madison St the North 1,310 25 0.0% 97.5% 1.5% 1.0% 75.0% 15.0% 10.0% 2 Soft 50 0.5 203 51.5 54.3 55.0 5 11 23 Yount Street Madison St Finnel Rd 1,870 25 0.0% 97.5% 1.5% 1.0% 75.0% 15.0% 10.0% 2 Soft 50 0.5 204 52.0 54.8 55.5 5 12 25 Yount Street Finnel Rd Washington St 2,090 25 0.0% 97.5% 1.5% 1.0% 75.0% 15.0% 10.0% 2 Soft 50 0.5 205 45.1 47.8 48.5 2 4 9 Finnel Road Yount St the East 420 25 0.0% 97.5% 1.5% 1.0% 75.0% 15.0% 10.0% 2 Soft 50 0.5 206 53.7 56.5 57.2 7 15 33 Washington Street Yount St the North 3,100 25 0.0% 97.5% 1.5% 1.0% 75.0% 15.0% 10.0% 2 Soft 50 0.5 207 53.7 56.5 57.2 7 15 33 Washington Street Yount St the South 3,090 25 0.0% 97.5% 1.5% 1.0% 75.0% 15.0% 10.0% 2 Soft 50 0.5 20 dBA at 50 feet Distance to CNEL Contour
Traffic Noise Calculator: FHWA 77-108 Yountville Commons (TYOU-03.0) Existing Plus Project Traffic Noise Traffic Conditions Output Inputs Auto Inputs
Segment
From - To
ID Leq-24hr Ldn CNEL 70 dBA 65 dBA 60 dBA Roadway ADT Posted Speed Limit Grade % Autos % Med Trucks % Heavy Trucks % Daytime % Evening % Night Number of Lanes Site Condition Distance to Reciever Ground Absorption Lane Distance 1 52.2 55.0 55.7 6 12 26 Madison Street Yount St the West 2,180 25 0.0% 97.5% 1.5% 1.0% 75.0% 15.0% 10.0% 2 Soft 50 0.5 202 49.4 52.1 52.8 4 8 17 Yount Street Madison St the North 1,130 25 0.0% 97.5% 1.5% 1.0% 75.0% 15.0% 10.0% 2 Soft 50 0.5 203 52.4 55.2 55.9 6 12 27 Yount Street Madison St Finnel Rd 2,280 25 0.0% 97.5% 1.5% 1.0% 75.0% 15.0% 10.0% 2 Soft 50 0.5 204 51.4 54.1 54.8 5 10 23 Yount Street Finnel Rd Washington St 1,790 25 0.0% 97.5% 1.5% 1.0% 75.0% 15.0% 10.0% 2 Soft 50 0.5 205 45.8 48.6 49.3 2 4 10 Finnel Road Yount St the East 500 25 0.0% 97.5% 1.5% 1.0% 75.0% 15.0% 10.0% 2 Soft 50 0.5 206 54.1 56.9 57.6 7 16 35 Washington Street Yount St the North 3,390 25 0.0% 97.5% 1.5% 1.0% 75.0% 15.0% 10.0% 2 Soft 50 0.5 207 54.2 56.9 57.6 7 16 35 Washington Street Yount St the South 3,410 25 0.0% 97.5% 1.5% 1.0% 75.0% 15.0% 10.0% 2 Soft 50 0.5 20 dBA at 50 feet Distance to CNEL Contour
Traffic Noise Calculator: FHWA 77-108 Yountville Commons (TYOU-03.0) Futrue No Project Traffic Noise Traffic Conditions Output Inputs Auto Inputs
Segment
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ID Leq-24hr Ldn CNEL 70 dBA 65 dBA 60 dBA Roadway ADT Posted Speed Limit Grade % Autos % Med Trucks % Heavy Trucks % Daytime % Evening % Night Number of Lanes Site Condition Distance to Reciever Ground Absorption Lane Distance 1 52.9 55.7 56.4 6 13 29 Madison Street Yount St the West 2,570 25 0.0% 97.5% 1.5% 1.0% 75.0% 15.0% 10.0% 2 Soft 50 0.5 202 50.6 53.4 54.1 4 9 20 Yount Street Madison St the North 1,520 25 0.0% 97.5% 1.5% 1.0% 75.0% 15.0% 10.0% 2 Soft 50 0.5 203 52.9 55.7 56.4 6 13 29 Yount Street Madison St Finnel Rd 2,550 25 0.0% 97.5% 1.5% 1.0% 75.0% 15.0% 10.0% 2 Soft 50 0.5 204 52.6 55.4 56.1 6 13 28 Yount Street Finnel Rd Washington St 2,410 25 0.0% 97.5% 1.5% 1.0% 75.0% 15.0% 10.0% 2 Soft 50 0.5 205 45.8 48.6 49.3 2 4 10 Finnel Road Yount St the East 500 25 0.0% 97.5% 1.5% 1.0% 75.0% 15.0% 10.0% 2 Soft 50 0.5 206 54.5 57.3 58.0 8 17 37 Washington Street Yount St the North 3,710 25 0.0% 97.5% 1.5% 1.0% 75.0% 15.0% 10.0% 2 Soft 50 0.5 207 54.5 57.3 58.0 8 17 37 Washington Street Yount St the South 3,710 25 0.0% 97.5% 1.5% 1.0% 75.0% 15.0% 10.0% 2 Soft 50 0.5 20 Segment
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Traffic Noise Calculator: FHWA 77-108 Yountville Commons (TYOU-03.0) Futrue Plus Project Traffic Noise Traffic Conditions Output Inputs Auto Inputs dBA at 50 feet Distance to CNEL Contour