Item 6C - Noise Study
December 13, 2023
Mr. Tanner Brandt
Christianson Companies
4609 33rd Avenue S., Suite 400
Fargo, ND 58104
Subject: DRAFT Summary Report for
Car Wash Noise Control
Tommy’s Express Car Wash – Southlake, Texas
Dear Mr. Brandt:
We understand you are in the process of developing a new Tommy’s Express Car Wash in
Southlake, Texas. The proposed site is at the northeast corner of N. Pearson Lane and
W. Southlake Boulevard (see Figure 1). Noise levels from the car wash sources must meet the
City of Southlake Code requirements at the nearest receivers. ESI Engineering was asked to
prepare calculations to evaluate car wash equipment noise levels, and if necessary, develop
recommendations to meet the Code requirements. The following is a summary of our analysis
results and recommendations.
Figure 1 – Aerial image overlaid with the Tommy’s Express Car Wash project site plan.
Mr. Tanner Brandt December 13, 2023
Christianson Companies Page 2
DRAFT
Site Conditions
The proposed project site is a vacant lot in Southlake, Texas. However, the west side of North
Pearson Lane is in Keller, Texas. Figure 2 shows the proposed project site and the nearest
property types as zoned by the City of Southlake and the City of Keller.
Figure 2 – Aerial image showing the nearest residential (yellow) and commercial (red)
zoned properties to the project site.
The project site has:
• A proposed new retail center to the west side of the car wash site.
• Nearby residential neighbors in nearly all directions.
• Nearby commercial neighbors in nearly all directions.
• A public utilities facility to the east.
The current project layout has the car wash building located near the east side of the lot with
the car wash entrance facing north and the exit facing south. Sixteen vacuums are shown at
the head of parking stalls to the west of the car wash building.
Mr. Tanner Brandt December 13, 2023
Christianson Companies Page 3
DRAFT
Noise Code Requirements
States and cities often have requirements for noise level limits at neighboring receivers. Based
on our review of the State of Texas laws that relate to nuisances, we are only aware of
“Chapter 42. Disorderly Conduct And Related Offenses” of the Texas Penal Code (provided in
Attachment A) having noise level limitations. Section c.2 states that, “a noise is presumed to
be unreasonable if the noise exceeds a decibel level of 85 after the person making the noise
receives notice from a magistrate or peace officer that the noise is a public nuisance.” In our
opinion, a noise level of 85 dBA at residential or commercial receivers would be perceived as
excessively loud and result in many complaints.
We have also reviewed the Noise Nuisances portion within the City of Southlake Code of
Ordinances (provided in Attachment B). “Section 11-61. – Offenses” has requirements for
maximum allowable noise levels by receiving property type. Table 1 shows the noise limits
given in this section of the Code. Since the Code does not clarify how the noise levels should
be evaluated, we assume the intent is to evaluate average (LAeq1) noise over a long period of
time (e.g., 10 minutes, 1 hour, etc.) at the receiving property line or anywhere on the receiving
property.
Table 1 – City of Southlake Prima Facie Maximum Allowable Noise Levels
“Section 11-60. – Definitions” has the following definitions that relate to the noise level
requirements in Table 1:
• Residential means any property used for temporary or permanent dwelling purposes.
• Commercial means property used for purposes other than residential or agricultural
regardless of whether the property has a commercial zoning designation.
• Daytime means the hours from 7:00 AM to 9:00 PM.
• Nighttime means the hours from 9:00 PM until 7:00 AM.
• A-weighted sound level means the sound pressure level in decibels as measured on a
sound level meter using the A-weighted network. The sound pressure level so read is
designated in dB(A) or dBA.2
1 LAeq, or equivalent A-weighted sound pressure level, is the average overall A-weighted sound level measured in
pascals during a particular time period that is then converted to decibels.
2 As defined in ANSI S12:60, “A-weighted sound level. Sound pressure level measured with a conventional frequency
weighting that roughly approximates how the human ear hears different frequency components of sounds at typical
listening levels for speech. The A-weighting (see IEC 61672-1) attenuates the low-frequency (or low-pitch)
content of a sound. A-weighted sound level is expressed in decibels, unit symbol dB[A].”
Property Receiving Sound Daytime Nighttime Sundays
Residential 60 dBA 55 dBA 55 dBA
Commercial 70 dBA 65 dBA 65 dBA
Mr. Tanner Brandt December 13, 2023
Christianson Companies Page 4
DRAFT
The City of Keller Code of Ordinances also has a Noise Ordinance section (provided in
Attachment C). While the Keller Code provides descriptions of possible noise nuisances, it does
not give specific noise level limitations. In the absence of clearly defined noise level limits in
the Keller Code, we recommend using the City of Southlake noise level requirements for similar
receiving properties within the City of Keller.
We understand the proposed car wash will only operate during daytime hours on weekdays and
weekend days. Therefore, based on the most stringent limits for Sunday operations in the City
of Southlake Code, the maximum allowable noise levels for the project are 55 dBA at residential
receivers and 65 dBA at commercial receivers (highlighted green in Table 1 above).
Existing Car Wash Measurements
To determine the car wash noise sources and equipment noise levels for the Southlake project,
noise measurements were made at an existing car wash. On Tuesday, February 8, 2022,
Mr. Ryan Skoug of ESI Engineering visited an existing Tommy’s Express Car Wash in Mounds
View, Minnesota to make observations and perform noise measurements. We understand that
the equipment for the Southlake car wash will be the same as that used in Mounds View. Sound
measurement data sheets are provided in Attachment D. The following is a summary of the visit
findings:
1. There were multiple Tommy Car Wash Systems vacuums at the site (see Figure 3). No
mufflers were installed on top of the vacuums. The measured LAeq sound pressure level
at a distance of 10’ from one running vacuum was 72 dBA.
Figure 3 – Photo of a vacuum at the Mounds View Tommy’s Express Car Wash.
Mr. Tanner Brandt December 13, 2023
Christianson Companies Page 5
DRAFT
2. The dominant noise source near the car wash exit (see Figure 4) was the drier system,
which had eighteen blowers (shown in Figure 5). The measured LAeq sound pressure
level at a distance of 58’ from the exit, with a zero-degree offset from the exit centerline,
was 83 dBA. When a measurement was made 54’ from the exit with a 45 degree offset
from the exit centerline, the measured LAeq was 79 dBA.
Figure 4 – Photo of the Tommy’s Express Car Wash exit with drier system beyond.
Figure 5 – Photo of the Tommy’s Express Car Wash drier system.
Mr. Tanner Brandt December 13, 2023
Christianson Companies Page 6
DRAFT
3. The dominant noise sources near the car wash entrance were the automated audio
system (see Figure 6) and the drier system at the other end of the car wash. Noise from
the other car wash equipment inside the building was also audible. The measured LAeq
sound pressure level at a distance of 48’ from the entrance, with a zero-degree offset
from the entrance centerline, was 72 dBA.
Figure 6 – Photo of the Tommy’s Car Wash entrance.
4. The car wash building had louvers with dampers on each side (see Figure 7). The
dampers could be opened and closed to control the release of heat and steam from
inside the building, which also allows sound to leak out. The dominant noise source
radiating from the dampers was the drier system. Noise from the other car wash
equipment inside the building was also audible. The measured LAeq level at a distance of
8.5’ from one open damper (shown in Figure 8) was 76 dBA.
Automated
Audio
System
Mr. Tanner Brandt December 13, 2023
Christianson Companies Page 7
DRAFT
Figure 7 – Photo of the Tommy’s Express Car Wash with sidewall louvers circled.
Figure 8 – Photo of the Tommy’s Express Car Wash with an open damper circled.
Mr. Tanner Brandt December 13, 2023
Christianson Companies Page 8
DRAFT
Noise Analysis
Calculations were prepared to determine the car wash noise levels at the nearest receiver
locations to the Southlake project site. The measured LAeq sound pressure level results from
the Tommy’s Express Car Wash in Mounds View, MN were used as source data for the analysis.
The results were converted into LAeq sound power levels to determine the noise from each source
independent of distance. Table 2 shows the sound power levels used for each noise source.
Table 2 – Car Wash Source Sound Power Levels
Noise contour plots were prepared to help evaluate the car wash noise levels at the proposed
project site. The calculations included the car wash building, all other nearby buildings, and a
source for each of the car wash noise producers. Sources were the exit opening, entrance
opening, fourteen east-facing sidewall louvers, sixteen west-facing sidewall louvers, and sixteen
vacuums near the head of parking stalls to the west of the car wash building.
The existing car wash measurement results showed that drier system noise at the exit and
entrance was directional. At a 45 degree offset from the centerline, the sound power was about
5 dBA quieter. This “tunnel effect” of the sound dispersion from the exit and entrance was
included in the noise calculations.
We reviewed the project site ground elevations on Google Earth and found that the site has an
increase in elevation to the north, and a decrease in elevation to the south. Based on our review
these elevations, we created the topographic contour lines that are shown on the aerial image
in Figure 9. Because the effectiveness of barrier noise reduction changes depending on the
elevation of the source and receiver positions, these topo lines were included in our noise
calculations and contour plots.
63 125 250 500 1k 2k 4k 8k
One Vacuum 4.5'56 57 66 75 82 86 84 80 90
Exit Opening 5'70 83 93 102 103 100 94 84 107
Entrance Opening 5'62 71 81 87 91 89 82 77 95
Open Side Louver 12'58 71 81 86 89 85 76 68 92
Source
Sound Power Levels (dBA) Per Frequency (Hz)Overall
Sound Power
Level (dBA)
Source
Height in
Noise Model
Mr. Tanner Brandt December 13, 2023
Christianson Companies Page 9
DRAFT
Figure 9 – Aerial image showing the topo lines that were included in the noise calculations.
We understand the project will also include the following options to reduce the car wash
equipment noise levels at nearby receiver properties:
1. A 520’ long, 8’ tall stone fence will be installed along the north property line of the
project site. We assume the following:
a. The 8’ fence height is relative to the elevation of the ground.
b. The fence will have no air gaps from ground up and from end to end.
c. The fence panels will have a minimum sound isolation rating (sound transmission
class, or STC3) of STC 25. We understand the project team is considering the
use of a Hilltop Concrete fence (see Figure 10), which has a laboratory tested
STC 35 rating (see test report in Attachment E) that meets the minimum
criterion.
3 Sound transmission class, or STC, is defined in ASTM standard C634-13 as, “a single-number rating calculated in
accordance with Classification E413 using values of sound transmission loss. It provides an estimate of the
performance of a partition in certain common sound insulation problems.” It is based on laboratory tests of wall
and floor/ceiling assemblies that serve as acoustical barriers, with higher values representing better insulation.
Mr. Tanner Brandt December 13, 2023
Christianson Companies Page 10
DRAFT
Figure 10 – Hilltop Concrete photo of a concrete fence.
2. The loudest car wash noise source is the drier system. We understand the individual
Tommy Car Wash Systems blowers can be installed with variable frequency drives
(VFDs) to control blower speeds between 0 Hz (0% speed) and 60 Hz (100% speed).
Based on a Tommy Car Wash Systems report dated May 18, 2021 (provided in
Attachment F), the car wash noise levels were reduced by 10 dBA when the blowers ran
at 40 Hz (67% speed). For the Southlake car wash, the blowers will run at no more than
40 Hz to achieve about 10 dBA of blower noise reduction at the car wash exit, entrance,
and side wall louvers.
3. Tommy Car Wash Systems has optional mufflers that can be provided with the vacuums.
Based on a Tommy Car Wash Systems report (provided in Attachment G), installing a
P-VAC-335 muffler (shown in Figure 11) on top of a vacuum reduces noise levels by
9 dBA and does not affect the vacuum suction. For the Southlake car wash, the vacuums
will all be installed with the P-VAC-335 mufflers.
Mr. Tanner Brandt December 13, 2023
Christianson Companies Page 11
DRAFT
Figure 11 – Photo of a Tommy Car Wash Systems vacuum with a P-VAC-335 muffler.
The calculation results for these basis-of-design conditions are summarized in the noise
contour plot shown in Figure 12. The results show that the loudest overall noise level at a
residential receiver is 55 dBA, and 64 dBA at a commercial receiver, which meets the 55 dBA
and 65 dBA criteria, respectively. No other modifications to the car wash equipment are
necessary.
Vacuum
Muffler
Mr. Tanner Brandt December 13, 2023
Christianson Companies Page 12
DRAFT
Figure 12 – Noise contour plot showing the Tommy’s Express Car Wash equipment noise levels at the proposed project site.
NOISE LEVEL KEY
dBA
< 85 dBA
< 80 dBA
< 75 dBA
< 70 dBA
< 65 dBA
< 60 dBA
< 55 dBA
< 50 dBA
< 45 dBA
< 40 dBA
< 35 dBA
8' Tall Masonry
Fence Location
Mr. Tanner Brandt December 13, 2023
Christianson Companies Page 13
DRAFT
Conclusions
ESI Engineering was asked to evaluate equipment noise levels for a proposed Tommy’s Express
Car Wash in Southlake, Texas. While the State of Texas does not have noise level limitations
that apply to this project, the City of Southlake Code of Ordinances require that the car wash
noise levels not exceed 55 dBA and 65 dBA at residential and commercial receivers,
respectively.
Calculations were prepared to evaluate car wash equipment sound levels at the nearest receiver
properties to the project site. The calculations were based on the following:
• Measured noise levels from a Tommy’s Express Car Wash in Mounds View, Minnesota.
• A 8’ tall stone fence along the north property line of the project site.
• The car wash drier blowers operate at a maximum 40 Hz (10 dBA reduction).
• Mufflers are installed on the car wash vacuums (9 dBA reduction).
These basis-of-design conditions produced calculated noise levels that met the City of
Southlake requirements at the nearby residential and commercial receivers. No additional
mitigation measures are necessary.
We appreciate the opportunity to serve the needs of Christianson Companies on this project
and remain available to assist in the resolution of these and any other matters. Please let us
know if you have any questions or need more information.
Sincerely,
Ryan L. Skoug, P.E. (OR), INCE Bd. Cert. Anthony J. Baxter, P.E. (MN)
Consulting Engineer Principal
ESI Engineering, Inc. ESI Engineering, Inc.
Andrew A.J. Schmitt
Consulting Engineer
ESI Engineering, Inc.
Attachments
File: P2991 Christianson Co. - DRAFT Summary Report for Southlake, TX Car Wash Noise Control, Dec 13, 2023 ver 1
DRAFT
Attachment A
Texas Penal Code – Chapter 42. Disorderly Conduct And Related Offenses
Southlake Car Wash Noise Control – December 13, 2023
9/18/23, 11:27 AM PENAL CODE CHAPTER 42. DISORDERLY CONDUCT AND RELATED OFFENSES
https://statutes.capitol.texas.gov/Docs/PE/htm/PE.42.htm 1/28
PENAL CODE
TITLE 9. OFFENSES AGAINST PUBLIC ORDER AND DECENCY
CHAPTER 42. DISORDERLY CONDUCT AND RELATED OFFENSES
Sec. 42.01. DISORDERLY CONDUCT. (a) A person commits an offense if
he intentionally or knowingly:
(1) uses abusive, indecent, profane, or vulgar language in a
public place, and the language by its very utterance tends to incite an
immediate breach of the peace;
(2) makes an offensive gesture or display in a public place, and
the gesture or display tends to incite an immediate breach of the peace;
(3) creates, by chemical means, a noxious and unreasonable odor
in a public place;
(4) abuses or threatens a person in a public place in an
obviously offensive manner;
(5) makes unreasonable noise in a public place other than a sport
shooting range, as defined by Section 250.001, Local Government Code, or in
or near a private residence that he has no right to occupy;
(6) fights with another in a public place;
(7) discharges a firearm in a public place other than a public
road or a sport shooting range, as defined by Section 250.001, Local
Government Code;
(8) displays a firearm or other deadly weapon in a public place
in a manner calculated to alarm;
(9) discharges a firearm on or across a public road;
(10) exposes his anus or genitals in a public place and is
reckless about whether another may be present who will be offended or
alarmed by his act; or
(11) for a lewd or unlawful purpose:
(A) enters on the property of another and looks into a
dwelling on the property through any window or other opening in the
dwelling;
(B) while on the premises of a hotel or comparable
establishment, looks into a guest room not the person's own through a
window or other opening in the room; or
(C) while on the premises of a public place, looks into an
area such as a restroom or shower stall or changing or dressing room that
is designed to provide privacy to a person using the area.
9/18/23, 11:27 AM PENAL CODE CHAPTER 42. DISORDERLY CONDUCT AND RELATED OFFENSES
https://statutes.capitol.texas.gov/Docs/PE/htm/PE.42.htm 2/28
(a-1) For purposes of Subsection (a), the term "public place"
includes a public school campus or the school grounds on which a public
school is located.
(b) It is a defense to prosecution under Subsection (a)(4) that the
actor had significant provocation for his abusive or threatening conduct.
(c) For purposes of this section:
(1) an act is deemed to occur in a public place or near a private
residence if it produces its offensive or proscribed consequences in the
public place or near a private residence; and
(2) a noise is presumed to be unreasonable if the noise exceeds a
decibel level of 85 after the person making the noise receives notice from
a magistrate or peace officer that the noise is a public nuisance.
(d) An offense under this section is a Class C misdemeanor unless
committed under Subsection (a)(7) or (a)(8), in which event it is a Class B
misdemeanor.
(e) It is a defense to prosecution for an offense under Subsection
(a)(7) or (9) that the person who discharged the firearm had a reasonable
fear of bodily injury to the person or to another by a dangerous wild
animal as defined by Section 822.101, Health and Safety Code.
(e-1) Subsection (a)(9) does not apply to a person who, at the time
the person engaged in conduct prohibited under that subdivision, was an
employee of the Parks and Wildlife Department acting within the scope of
the employee's authority under Section 12.013(c), Parks and Wildlife Code.
(f) Subsections (a)(1), (2), (3), (5), and (6) do not apply to a
person who, at the time the person engaged in conduct prohibited under the
applicable subdivision, was a student younger than 12 years of age, and the
prohibited conduct occurred at a public school campus during regular school
hours.
(g) Noise arising from space flight activities, as defined by Section
100A.001, Civil Practice and Remedies Code, if lawfully conducted, does not
constitute "unreasonable noise" for purposes of this section.
Acts 1973, 63rd Leg., p. 883, ch. 399, Sec. 1, eff. Jan. 1, 1974. Amended
by Acts 1977, 65th Leg., p. 181, ch. 89, Sec. 1, 2, eff. Aug. 29, 1977;
Acts 1983, 68th Leg., p. 4641, ch. 800, Sec. 1, eff. Sept. 1, 1983; Acts
1991, 72nd Leg., ch. 145, Sec. 2, eff. Aug. 26, 1991; Acts 1993, 73rd
Leg., ch. 900, Sec. 1.01, eff. Sept. 1, 1994; Acts 1995, 74th Leg., ch.
318, Sec. 14, eff. Sept. 1, 1995; Acts 2001, 77th Leg., ch. 54, Sec. 4,
eff. Sept. 1, 2001; Acts 2003, 78th Leg., ch. 389, Sec. 1, eff. Sept. 1,
2003.
Amended by:
DRAFT
Attachment B
City of Southlake Code of Ordinances – Noise Nuisances
Southlake Car Wash Noise Control – December 13, 2023
11/28/23, 4:24 PM Southlake, TX Code of Ordinances
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ARTICLE III. - NOISE NUISANCES
Sec. 11-60. - De nitions.
All terms not defined in this article shall be in conformance with the applicable publications of the
American National Standards Institute (ANSI) or its successor body. The following words, terms and phrases,
when used in this article, shall have the meanings ascribed to them in this section, except where the context
clearly indicates a different meaning.
A-weighted sound level means the sound pressure level in decibels as measured on a sound level meter
using the A-weighted network. The sound pressure level so read is designated in dB(A) or dBA.
Clearly audible means sound that can be heard without the assistance of any device.
Commercial means property used for purposes other than residential or agricultural regardless of
whether the property has a commercial zoning designation.
Construction means any phase of the on-site erection or removal, including, but not limited to,
excavation, demolition, alteration or repair of any building or structure conducted on that site.
Daytime means the hours from 7:00 a.m. to 9:00 p.m.
Decibel (dB) means a unit of sound pressure level on a logarithmic scale measured relative to the
threshold of audible sound by the human ear, in compliance with the American National Standards Institute
(ANSI) Standard S1.1-1960, or the successor thereto.
Director means the director of the city department of public safety or the director's authorized
representative.
Governmental entity means any department, board, committee, or unit of the school districts within the
city, the city municipal government, or the state or the federal government, including but not limited to the
school board, joint-use committee, city council, planning and zoning commission, park board, SPIN
committees, and city departments.
Immediate vicinity means any distance within 100 feet of the noise source, or any area within the
property line of the parcel or lot upon which the source of noise is emanating, whichever is the greater
distance from the noise source.
Nighttime means the hours from 9:00 p.m. until 7:00 a.m.
Noise means any sound which annoys or disturbs humans or which causes or tends to cause an adverse
psychological or physiological effect on humans.
Person means any individual, corporation, business or other entity.
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(a)
(b)
(c)
(1)
(2)
Repetitive incident of noise means a recurrence of any sound from the same source which repeats itself
three or more times per day, whether at routine cyclical periods or random periods.
Residential means any property used for temporary or permanent dwelling purposes.
Sound means the weighted sound pressure level obtained by the use of a sound level meter and
frequency weighting network as specified in ANSI specifications for sound level meters. When the frequency
weighting employed is not indicated, the A-weighting shall apply.
Sound pressure means the instantaneous difference between the actual pressure and the average or
barometric pressure at a given point in space, as produced by sound energy.
Sound pressure level means 20 times the logarithm to the base ten of the ratio of the RMS sound
pressure to the reference pressure of 20 micropascals. This sound pressure level is expressed in decibels.
(Ord. No. 778, § 1, 8-15-00; Ord. No. 778-A, § 1, 3-1-05)
Sec. 11-61. - O enses.
Tampering with sound instrument. It shall be unlawful for any person to remove or render
inaccurate or inoperative any sound level meter or any similar monitoring instrument or device
positioned for the purpose of enforcing the provisions of this Article. It shall be unlawful for any
person to provide false readings of any sound instrument.
Noise nuisance. A person shall not create, assist in creating, permit or continue any excessive or
unnecessary noise of a volume, intensity, repetitiveness or duration that is clearly audible and
disturbs, annoys, or endangers the calm, comfort, quiet, repose, health, peace or safety of
persons of ordinary sensibilities beyond the immediate vicinity of the noise. Such noise shall be a
violation of this article.
Prima facie violation. The following acts of noise are prima facie evidence of a violation of this
article:
Permitting an unreasonably loud, harsh, or prolonged sounding of any horn, alarm, or other
signal device on any vehicle, unless: (i) necessary to ensure safe operation as authorized by
state law, or (ii) caused by mechanical failure beyond the operator's control and the operator
takes all reasonable measures to stop the noise made by the horn, alarm, or other device.
Playing or use of any sound producing or amplifying device, speaker, radio, tape player,
compact disc player, loud speaker, or electronic "boom-box" or other similar instrument,
including a musical instrument, in such a manner or in such loud volume or intensity, at any
time or place, so as to disturb, destroy, or endanger the peace, comfort, repose, or rest of
persons of ordinary sensibilities beyond the immediate vicinity of the noise or disturbance, or
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(3)
(4)
(5)
(6)
(7)
(8)
(9)
(10)
(11)
(12)
in such a manner that the sound is clearly audible or generates perceptible base tone vibrations more than
50 feet from a vehicle, or when such noise exceeds the dBA levels shown in Table 1 hereinbelow.
Creating a loud noise or disturbance in or with a motor vehicle or any appurtenance to such
vehicle, including without limitation, a bed, trailer, or other equipment connected in any
manner to the vehicle, so as to disturb, destroy, endanger the peace, comfort, repose or rest
of persons of ordinary sensibilities beyond the immediate vicinity of the source of the noise.
Operating a motor vehicle that is not equipped with a muffler in good working order and in
use at all times.
Using any mechanical device operated by compressed air, unless the noise is effectively
muffled and reduced to the dBA levels shown in Table 1 hereinbelow.
Permitting any loud, harsh, or prolonged sounding of any burglar or fire alarm or other
distress signal on any dwelling, commercial building, or other premises, unless: (a) authorized
by law, or (b) caused by mechanical failure beyond the operator's control and the operator
takes all reasonable measures to stop the noise made by the alarm or other device.
Operating any heavy equipment, machinery or apparatus used in any exterior or outdoor
construction, repair, remodeling, demolition, drilling, excavation, grading, earth moving,
paving, cement laying or pouring, or other work of any nature during the nighttime or anytime
on Sunday within 1,000 feet of any residential property, unless otherwise indicated in section
11-62 exceptions.
Creating any loud or raucous noise within 1,000 lineal feet of any school building or court that
is in session or adjacent to any hospital building or similar care facility, provided that
conspicuous signs located on the premises identify the premises.
Operating, as a part of any business, any equipment or machinery, including, but not limited
to, combustion engines, fans, blowers, grinders, welders, loaders, washers, winches, lifts, and
hoists, whether independent or attached to a motor vehicle, during the nighttime within 1,000
lineal feet of any residential dwelling which equipment or machinery is clearly audible and
disturbs, annoys, or endangers the calm, comfort, quiet, repose, health, peace or safety of
persons of a reasonable and prudent person of ordinary sensibilities.
Discharging into the open air the exhaust of any steam engine, stationary internal combustion
engine, or motor vehicle engine or boat engine, except through a muffler or other device
which will effectively prevent loud or explosive noises therefrom.
Conducting any commercial or industrial trash or waste pickup within 1,000 lineal feet of any
residential dwelling during the nighttime.
Conducting or permitting any activity that produces a dBA level beyond the immediate vicinity
that exceeds the dBA levels specified in Table 1 hereinbelow.
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(d)
(1)
(2)
(3)
(4)
(5)
(6)
(7)
TABLE 1
PRIMA FACIE MAXIMUM ALLOWABLE NOISE LEVELS
Property receiving
sound
Daytime Nighttime Sundays
Residential 60 dBA 55 dBA 55 dBA
Commercial 70 dBA 65 dBA 65 dBA
Noise level enforcement. For the purposes of enforcement monitoring, readings are to be taken
with a sound level meter instrument capable of sound level measurements over a range of 40 to
140 dB meeting the requirements of the American National Standards Institute (ANSI) Standard
Specification for a Type S2A general purpose sound level meter or better. Such measurements
are intended to be taken on typical single incident noise from activity at the noise source that is
reasonably representative of the customary and normal use for the property and from which the
noise generates.
(Ord. No. 778, § 1, 8-15-00)
Sec. 11-62. - Exceptions.
The following activities are exempt from the provisions of this article:
Emergency work immediately necessary to restore property to a safe condition following a
fire, accident or natural disaster, to restore public utilities, or to protect persons or property
from imminent danger;
Sounds made to alert persons to the existence of an emergency, an imminent danger, or an
attempted crime;
Parades, concerts, festivals, fairs or similar activities specifically approved by the city council
or sponsored by or on behalf of a governmental body;
Athletic, musical, or cultural activities or events, including practices and rehearsals, conducted
by or under the auspices of public or private schools;
Sound created by animals or livestock kept or maintained by persons on agriculturally zoned
parcels where such animal or livestock is a part of a bonafide agricultural operation;
Sounds created while conducting yard work or lawn maintenance during the daytime,
including, but not limited to, lawn mowing, leaf blowing, brush clearing, and use of chain
saws;
Sounds created as a part of new construction, remodeling or maintenance activities on a
building or structure during the daytime, excluding Sundays; or new construction, remodeling
or maintenance activities indoors on Sunday during the daytime and which do not produce
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(8)
(9)
(10)
(11)
(12)
(13)
(a)
(b)
(1)
(2)
(3)
(4)
(5)
any clearly audible noise outside of the immediate vicinity.
Sounds authorized under a temporary noise exemption permit as provided in this article;
Sounds created during construction, maintenance, or repairs conducted by or on behalf of a
governmental entity providing basic utility services or roadway projects approved by the city
council;
Sounds created by agricultural operations when such operations are related to activities
directly associated with agricultural business, including raking, baling, plowing, planting,
harvesting, milking, feeding, and mowing;
Sounds created by typical roadway noises from traffic flow;
Any aircraft in flight subject to federal law regarding noise control and any helicopter in the
act of landing or taking off at a helipad licensed by the city or for use in emergency rescue or
any railroad governed by federal law; and
Any activity of a temporary duration for which a license or permit has been granted by the
city, state or federal government, including, but not limited to ice cream and snow cone
vehicle vendors.
(Ord. No. 778, § 1, 8-15-00)
Sec. 11-63. - Temporary noise exemption permits.
Permit generally. A person may apply for a permit to engage in any activity that creates a noise
that would otherwise constitute a nuisance or be a violation of this article. A person must apply in
writing to the director at least ten calendar days prior to the requested issuance date and time,
unless the director determines that unforeseeable circumstances justify a shorter amount of
time.
Application for permit. The application for a permit shall be on a form prescribed by the director
and must include the following:
The name, address, and telephone number of the applicant for both daytime and nighttime
contact;
A description of the type, duration, and location of the noise, specifically including the date
and time the noise will occur;
The reason the noise level is expected to exceed the provisions of this article;
The name, if different from the applicant, of the owner of the property on which the noise will
occur and a written letter of permission from the owner and any tenants or other persons
occupying the property from which the noise will occur;
A statement from the applicant that all property owners within 200 lineal feet to the property
upon which the noise originates will be provided written notification within 24 hours of
making the application of their right to respond directly to the director to voice support or
11/28/23, 4:24 PM Southlake, TX Code of Ordinances
about:blank 6/7
(6)
(c)
(d)
(e)
(1)
(2)
(3)
(4)
(f)
(g)
(1)
(2)
(3)
(h)
(1)
(2)
(3)
opposition to the application; and
A copy of the notification(s) sent to any such property owners.
Filling fee. A filing fee must be submitted with the application for a permit, in an amount
prescribed in a fee schedule adopted by the city council, or $25.00 in the absence of such fee
schedule. No such fees shall be assessed to any governmental entity or any person conducting
activities on behalf of the governmental entity.
Duration of permit. The duration of such permit shall not exceed two calendar days.
Grounds for granting or denying permit. In determining whether to grant or deny the permit, the
director may consider the following factors, among others:
The safety of the persons that will be subjected to the noise, whether voluntarily or
involuntarily;
The number of persons that will be involuntarily subjected to the noise;
The reasonableness of the time, place, and manner of the noise and the duration of the noise;
and
Any other factors necessary to determine the impact on the public health or safety and the
disruption of the peace that the noise may cause.
Notice of director's decision. The director shall, within five calendar days following the date of the
application, notify the applicant of the director's decision either to grant or deny the permit. If the
director denies the permit, the director shall state the reasons for the denial in a written notice
provided to the applicant. If the director grants the permit, the director may place reasonable
time, place, and other restrictions on the activity authorized by the permit.
Appeal. Upon receiving such notice from the director, the applicant may appeal the director's
decision, including restrictions placed on the activity authorized by the permit, to the city
manager. Within one working day of receiving the appeal, the city manager shall consider the
application, the basis of denial, or any restrictions placed on issuance of the permit. Based on
standards stated in subsection (e) of this section, the city manager may:
Uphold the decision of the director;
Approve or deny the issuance of the permit as applied for; or
Modify or delete restrictions placed on the permit.
Permit. The permit shall be in a form prescribed by the director and shall be displayed in the
immediate vicinity of the source of the noise at all times during the commission of the noise. The
permit shall include the following:
The date and time that the permit shall begin and end;
The name of the permit holder and who will be generating the noise;
A description of the basic nature of the noise;
11/28/23, 4:24 PM Southlake, TX Code of Ordinances
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(4)
(5)
The specific location of the noise; and
Any special limitations or restrictions placed on the permit.
(Ord. No. 778, § 1, 8-15-00)
Sec. 11-64. - Variances.
The city council may authorize a variance to any restriction set forth in this article or any other aspect
involved in the permitting process. Before granting a variance, the city council must determine that a literal
enforcement of this article would create an unnecessary hardship or a practical difficulty on the applicant,
that the situation causing the unnecessary hardship or practical difficulty is unique to the affected property
and is not self-imposed, that the variance will not injure and will be wholly compatible with the use and
permitted development of adjacent properties, and that the granting of the variance will be in harmony with
the spirit and purpose of this article. A person may request a variance from this article by filing the request
with the city secretary. Any request for variance shall be accompanied by a completed application and a
nonrefundable filing fee in the amount specified in the current fee schedule adopted by city council, or
$100.00 in the absence of such fee schedule.
(Ord. No. 778, § 1, 8-15-00)
Secs. 11-65—11-70. - Reserved.
DRAFT
Attachment C
City of Keller Code of Ordinances – Noise Nuisances
Southlake Car Wash Noise Control – December 13, 2023
11/28/23, 10:15 AM Keller, TX Code of Ordinances
about:blank 1/5
(a)
(b)
(c)
(d)
(e)
(1)
ARTICLE VIII. - NOISE ORDINANCE
Footnotes:
--- (6) ---
Editor's note— Ord. No. 1734, § 2, adopted Feb. 17, 2015, added provisions numbered as §§ 10-1100—10-1140. In order
to avoid conflicts in section numbering the editor has renumbered these added provisions as §§ 10-1300—10-1340.
Sec. 10-1300. - De nitions.
For the purpose of this article the following terms have the definitions herein ascribed to them:
Authorized event. An event is deemed to be authorized if the event received an official permit for
the event through the City of Keller Special Event Review Team (SPERT), an authorized sporting
event at the City of Keller Sports Park, and events approved by the Keller Independent School
District at their campuses within the City of Keller.
Noise. A loud or unpleasant sound that someone or something creates.
Noise nuisance. Any unreasonably loud, disturbing, unnecessary noise which causes material
distress, discomfort or injury to persons of ordinary sensibilities in the immediate vicinity, or any
noise of such character, intensity, and continued duration which substantially interferes with the
comfortable enjoyment of private homes by persons of ordinary sensibilities is hereby declared
to be a noise nuisance.
Residential district. A district as described in the City of Keller Unified Development Code for
residential use. Examples of this district would include, but is not limited to, SF-LD, SF-8.4, SF-10,
SF-12, SF-15, SF-20, SF-25, SF-30, 2F, and MF.
Commercial district. A district as described in the City of Keller Unified Development Code for
uses that may or may not include residential uses. Examples of this district would include, but are
not limited to, O, NS, R, TC, C, IP, LI, PD, SUP, OTK, N377 and KATY ROAD.
(Ord. No. 1734, § 2, 2-17-15; Ord. No. 2088 , § 2, 9-20-22)
Sec. 10-1310. - Noise nuisances.
The following acts, among others, are declared to be per se, violations of this article. The following
enumerations shall not be deemed to be exclusive:
Unreasonable noise prohibited. No person shall make or knowingly permit or allow to be
made any unreasonably loud, disturbing, unnecessary noise which disturbs the peace and
quiet of a neighborhood or which causes material distress, discomfort or injury to persons of
ordinary sensibilities in the immediate vicinity.
11/28/23, 10:15 AM Keller, TX Code of Ordinances
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(2)
(3)
(4)
(5)
(6)
a.
(i)
(ii)
Unreasonable noise prohibited in or near residential areas. No person shall make or allow for
any noise of such character, intensity, and continued duration which substantially interferes
with the comfortable enjoyment of private homes by persons of ordinary sensibilities. No
business within a commercial district shall allow for any unreasonable noise of such
character, intensity, and continued duration which substantially interferes with the
comfortable enjoyment of private homes by persons of ordinary sensibilities.
Vehicle horns, signaling devices, and similar devices: The sounding of any horn, signaling
device, or other similar device, on any automobile, motorcycle, or other vehicle on any right-
of-way or in any public space of the City of Keller, for more than ten (10) consecutive seconds
unless the sounding of any horn, signaling device, or other similar device is a danger warning.
Nonemergency signaling devices: Sounding or permitting the sounding of any amplified signal
from any bell, chime, siren, whistle, or similar device intended primarily for nonemergency
purposes from any place for more than ten (10) consecutive seconds in any hourly period. It is
an affirmative defense to this subsection that the amplified signal is the reasonable sounding
of such devices by houses of religious worship, ice cream trucks, seasonal contribution
solicitors, or by the City of Keller for traffic control.
Radios, televisions, boom boxes, phonographs, stereos, musical instruments, and similar
devices: The use or operation of a radio, television, boom box, stereo, musical instrument, or
similar device that produces or reproduces sound in a manner that is plainly audible to any
person other than the player(s) or operator(s) of the device, and those who are voluntarily
listening to the sound, and which unreasonably disturbs the peace, quiet, and comfort of
neighbors and passersby, or is plainly audible at a distance of fifty (50) feet from any person
in a commercial, industrial area, or public space. The use or operation of a radio, television,
boom box, stereo, musical instrument, or similar device that produces or reproduces sound
in a manner that is plainly audible to any person other than the player(s) or operator(s) of the
device, and those who are voluntarily listening to the sound, and unreasonably disturbs the
peace, quiet, and comfort of neighbors in residential areas, including multi-family or single-
family dwellings.
Loudspeakers, amplifiers, public address systems, and similar devices: Unless addressed
below in section 10-1310(11), the unreasonably loud, disturbing, and unnecessary use or
operation of a loudspeaker, amplifier, public address system, or other device for producing or
reproducing sound:
Between the hours of 10:00 p.m. and 7:00 a.m. on weekdays, and 10:00 p.m. and 10:00
a.m. on weekends and holidays in the following areas:
Within or adjacent to a residential area;
11/28/23, 10:15 AM Keller, TX Code of Ordinances
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b.
(7)
(8)
(9)
a.
b.
c.
(10)
(11)
Within public space if the sound is plainly audible across the real property line of the public space from
which the sound emanates, and is unreasonably loud and raucous; or
From moving vehicles for the purpose of advertising any show, sale, display of
merchandise, or any other purpose.
Yelling, shouting, and similar activities: Yelling, shouting, whistling, or singing in residential
areas or in public places, between the hours of 10:00 p.m. and 7:00 a.m., or at any time or
place so as to unreasonably disturb the quiet, comfort, or repose of reasonable persons of
ordinary sensitivities.
Animals and birds: Unreasonably loud, disturbing, and unnecessary noise emitted by an
animal or bird for which a person is responsible. A person is responsible for an animal if the
person owns, controls, harbors, or otherwise cares for the animal or bird unless the sounds
made by animals or birds in animal shelters, kennels, veterinary hospitals, pet shops, or pet
kennels, licensed under and in compliance with licensing and permitting provisions set forth
in this code.
Lawn mowers, blowers and similar devices: In residential areas, between the hours of 10:00
p.m. and 7:00 a.m., the operation of any noise, disturbing, and unnecessary:
Grating, grinding, or rattling noise caused by the use of any motor vehicle that is out of
repair or poorly or improperly loaded;
The discharge into the open air of the exhaust of any stationary steam engine, stationary
internal combustion engine, or motor boat engine, except through a muffler or other
device that will effectively and efficiently prevent loud and disturbing noises or vibrations;
or
The discharge into the open air of the exhaust from any motor vehicle, except through a
muffler or other device that will effectively and efficiently prevent loud and disturbing
noises or vibrations.
Vibration: The use or cause of the use of any device that creates any ground vibration which is
perceptible without instruments at any point beyond the property boundary of the source of
the vibration.
Commercial districts : Businesses and public spaces in a Commercial District shall only be
allowed to have an outdoor band, music or any type of amplified sound according to the
following schedule:
Monday: Between 10:00 a.m. to 10:00 p.m.
Tuesday: Between 10:00 a.m. to 10:00 p.m.
Wednesday: Between 10:00 a.m. to 10:00 p.m.
11/28/23, 10:15 AM Keller, TX Code of Ordinances
about:blank 4/5
(12)
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
Thursday: Between 10:00 a.m. to 12:00 a.m. the following Friday morning
Friday: Between 10:00 a.m. to 12:00 a.m. the following Saturday morning
Saturday: Between 10:00 a.m. to 12:00 a.m. the following Sunday morning
Sunday: Between 10:00 a.m. to 11:00 p.m.
Motor vehicle idling: The operation of any engine of any motor vehicle with a manufacturer's
gross weight specification in excess of ten thousand (10,000) pounds within a residential area
or three hundred (300) feet of a residential structure for a period in excess of fifteen (15)
minutes unless the vehicle is located in an enclosed structure.
(Ord. No. 1734, § 2, 2-17-15; Ord. No. 2088 , § 2, 9-20-22)
Sec. 10-1320. - Reserved.
Editor's note— Ord. No. 1734, § 2, 2-17-15; Ord. No. 2088 , adopted Sept. 20, 2022, repealed § 10-1320,
which pertained to the commercial district noise curfew, and derived from Ord. No. 1734, § 2, adopted Feb.
17, 2015.
Sec. 10-1330. - A rmative defenses.
It shall be an affirmative defense that the noise was as a result of the following activities:
A person at an authorized event;
A person operating a bell for a religious activity;
A person operating an emergency vehicle;
A person operating an audible warning device on a vehicle or train as required by state law;
A siren or other warning device emitting a noise for the purposes of warning the population
of dangerous weather or other events. A noise from such a warning device is exempt
regardless of whether the sound is made for the purposes of warning or testing;
A person operating equipment or making deliveries for site development or site preparation
between 6:00 a.m. and 7:00 p.m. on Monday through Friday, and 8:00 a.m. and 6:00 p.m. on
Saturday and Sunday or as such deliveries may be allowed in a Planned Development District
or by other Keller ordinance;
A public performance, gathering, or parade for which a permit has been obtained from the
City of Keller, so long as the event is within the requirements of the permit; or
Noise made to signal for emergency help.
(Ord. No. 1734, § 2, 2-17-15; Ord. No. 2088 , § 2, 9-20-22)
11/28/23, 10:15 AM Keller, TX Code of Ordinances
about:blank 5/5
(1)
(2)
a.
b.
c.
d.
e.
Sec. 10-1340. - O enses.
A person commits an offense if the person creates a noise nuisance, as defined in this article, or
uses sound generating equipment in violation of a provision of this article.
Notice.
Generally. Prior to issuance of a court summons or ticket, a violator will be given notice to
stop the noise or the source of the noise.
No waiting period. If the violation does not cease after notice, the violator may receive a court
summons or ticket on the same date as the original notice.
Notice good for a year. Once a notice is received, the violator will not be entitled to another
warning notice for a noise violation at any time in the next year.
Notice requirement not applicable to other offenses occurring contemporaneously. The
requirement for notice does not apply to any other violation found while investigating a noise
complaint.
Notice requirement not applicable to vehicles. Notice is not required for noise violations
emanating from vehicles.
(Ord. No. 1734, § 2, 2-17-15; Ord. No. 2088 , § 2, 9-20-22)
Secs. 10-1341—10-1399. - Reserved.
DRAFT
Attachment D
Existing Mounds View Car Wash Noise Measurement Data
Southlake Car Wash Noise Control – December 13, 2023
Calibration Frequency: 1 kHz
Initial Calibration: 94.0 dB
Final Calibration: 93.8 dB
Last Cal. Check: 2/8/22 @ 11:03 AM
Temperature: 26 °F
Wind Speed / Dir.: 6 MPH / SW
Humidity: 69%
Location:
Measurements:
Meteorology:
Preamplifier:
Location:
Project:
Engineer:
Microphone:
Last Calibrated:
Analyzer:
Calibrator:
Start Time:
End Time:
Run Time:
Christianson Co. - Tommy's Car Wash
P2816
Bloomington, MN
R.L. Skoug
Project No:
Date:
Calibration Check:
Acoustic Test Results
Minneapolis, Minnesota | o: 952.831.4646 | esi-engineering.com
Figure A1
Larson Davis PRM831 s/n 070949
Larson Davis 377C20 s/n 320010
Larson Davic CAL200 s/n 18322
December 9, 2021
Larson Davis 831 s/n 4694
10:06:49 AM
60.5 seconds
10:07:49 AM
2/8/2022
10:06:49 10:06:59 10:07:09 10:07:19 10:07:29 10:07:39 10:07:49h.m.s.
Time, h.m.s.
50
60
70
80
90
dBA
Sound Pressure Level, dBA re. 20 µPa831_Data.002 - LAeq
831_Data.002 - LAeq - Running Leq
10:07:49
71.7 dBA
72.1 dBA
Tommy's Car Wash, Mounds View, MN
31.5 63 125 250 500 1K 2K 4K 8K 16KHz
1/3 Octave Band Frequency, Hz
20
30
40
50
60
70
80
90
dB
Sound Pressure Level, dBA re. 20 µPa(L) (A)
831_Data.002 - 1/1 Leq Spectrum + SLM - Linear
250 (L) (A)
57.1 73.8 72.0
L50.0: 72.1 dBA
L10.0: 72.4 dBA
L1.0: 72.7 dBA
L90.0: 72.1 dBA
L95.0: 71.7 dBA
LMin: 71.4 dBA
831_Data.002
1/1 Leq Spectrum + SLM - Linear
Hz dBA Hz dBA Hz dBA Hz dBA Hz dBA
31.5
63
125
250
500
1000
2000
4000
8000
16000
64.5 dBA
64.7 dBA
55.9 dBA
57.1 dBA
60.5 dBA
63.9 dBA
67.1 dBA
65.4 dBA
63.3 dBA
59.1 dBA
LMax: 72.9 dBA
Leq: 72.1 dBA
File N. 2: 10' from a Running Vaccuum.
Calibration Frequency: 1 kHz
Initial Calibration: 94.0 dB
Final Calibration: 93.8 dB
Last Cal. Check: 2/8/22 @ 11:03 AM
Temperature: 26 °F
Wind Speed / Dir.: 6 MPH / SW
Humidity: 69%
Location:
Measurements:
Meteorology:
Preamplifier:
Location:
Project:
Engineer:
Microphone:
Last Calibrated:
Analyzer:
Calibrator:
Start Time:
End Time:
Run Time:
Christianson Co. - Tommy's Car Wash
P2816
Bloomington, MN
R.L. Skoug
Project No:
Date:
Calibration Check:
Acoustic Test Results
Minneapolis, Minnesota | o: 952.831.4646 | esi-engineering.com
Figure A2
Larson Davis PRM831 s/n 070949
Larson Davis 377C20 s/n 320010
Larson Davic CAL200 s/n 18322
December 9, 2021
Larson Davis 831 s/n 4694
File N. 3: 57'-6" from the Exit.
Zero Degree Offset from Centerline.
Blowers On (Blowers Off Time Extracted).
Tommy's Car Wash, Mounds View, MN
10:10:02 AM
190.2 seconds
10:13:12 AM
2/8/2022
10:10:02 10:11:02 10:12:02 10:13:02h.m.s.
Time, h.m.s.
50
60
70
80
90
dBA
Sound Pressure Level, dBA re. 20 µPa831_Data.003e - LAeq
831_Data.003e - LAeq - Running Leq
10:13:12
80.5 dBA
82.7 dBA
31.5 63 125 250 500 1K 2K 4K 8K 16KHz
1/3 Octave Band Frequency, Hz
20
30
40
50
60
70
80
90
dB
Sound Pressure Level, dBA re. 20 µPa(L) (A)
831_Data.003e - 1/1 Leq Spectrum + SLM - Linear
1000 (L) (A)
79.0 85.3 82.7
L50.0: 82.7 dBA
L10.0: 84.1 dBA
L1.0: 85.1 dBA
L90.0: 80.7 dBA
L95.0: 80.0 dBA
LMin: 76.9 dBA
831_Data.003e
1/1 Leq Spectrum + SLM - Linear
Hz dBA Hz dBA Hz dBA Hz dBA Hz dBA
31.5
63
125
250
500
1000
2000
4000
8000
16000
69.7 dBA
72.2 dBA
74.6 dBA
77.0 dBA
80.5 dBA
79.0 dBA
74.3 dBA
68.2 dBA
60.8 dBA
50.7 dBA
LMax: 85.7 dBA
Leq: 82.7 dBA
Calibration Frequency: 1 kHz
Initial Calibration: 94.0 dB
Final Calibration: 93.8 dB
Last Cal. Check: 2/8/22 @ 11:03 AM
Temperature: 26 °F
Wind Speed / Dir.: 6 MPH / SW
Humidity: 69%
Location:
Measurements:
Meteorology:
Preamplifier:
Location:
Project:
Engineer:
Microphone:
Last Calibrated:
Analyzer:
Calibrator:
Start Time:
End Time:
Run Time:
Christianson Co. - Tommy's Car Wash
P2816
Bloomington, MN
R.L. Skoug
Project No:
Date:
Calibration Check:
Acoustic Test Results
Minneapolis, Minnesota | o: 952.831.4646 | esi-engineering.com
Figure A3
Larson Davis PRM831 s/n 070949
Larson Davis 377C20 s/n 320010
Larson Davic CAL200 s/n 18322
December 9, 2021
Larson Davis 831 s/n 4694
File N. 4: 54' from the Exit.
45 Degree Offset from Centerline.
Blowers Drying 3 Cars (Blowers Off Time Extracted).
Tommy's Car Wash, Mounds View, MN
10:23:00 AM
67.4 seconds
10:24:07 AM
2/8/2022
10:23:00 10:23:30 10:24:00 10:24:30h.m.s.
Time, h.m.s.
50
60
70
80
90
dBA
Sound Pressure Level, dBA re. 20 µPa831_Data.004e - LAeq
831_Data.004e - LAeq - Running Leq
10:24:07
76.5 dBA
78.7 dBA
31.5 63 125 250 500 1K 2K 4K 8K 16KHz
1/3 Octave Band Frequency, Hz
20
30
40
50
60
70
80
90
dB
Sound Pressure Level, dBA re. 20 µPa(L) (A)
831_Data.004e - 1/1 Leq Spectrum + SLM - Linear
1000 (L) (A)
75.5 82.1 78.7
L50.0: 78.6 dBA
L10.0: 80.0 dBA
L1.0: 80.7 dBA
L90.0: 77.3 dBA
L95.0: 76.7 dBA
LMin: 66.4 dBA
831_Data.004e
1/1 Leq Spectrum + SLM - Linear
Hz dBA Hz dBA Hz dBA Hz dBA Hz dBA
31.5
63
125
250
500
1000
2000
4000
8000
16000
70.9 dBA
72.1 dBA
74.2 dBA
73.7 dBA
74.4 dBA
75.5 dBA
71.3 dBA
64.4 dBA
58.1 dBA
48.3 dBA
LMax: 81.0 dBA
Leq: 78.7 dBA
Calibration Frequency: 1 kHz
Initial Calibration: 94.0 dB
Final Calibration: 93.8 dB
Last Cal. Check: 2/8/22 @ 11:03 AM
Temperature: 26 °F
Wind Speed / Dir.: 6 MPH / SW
Humidity: 69%
Location:
Measurements:
Meteorology:
Preamplifier:
Location:
Project:
Engineer:
Microphone:
Last Calibrated:
Analyzer:
Calibrator:
Start Time:
End Time:
Run Time:
Christianson Co. - Tommy's Car Wash
P2816
Bloomington, MN
R.L. Skoug
Project No:
Date:
Calibration Check:
Acoustic Test Results
Minneapolis, Minnesota | o: 952.831.4646 | esi-engineering.com
Figure A4
Larson Davis PRM831 s/n 070949
Larson Davis 377C20 s/n 320010
Larson Davic CAL200 s/n 18322
December 9, 2021
Larson Davis 831 s/n 4694
Tommy's Car Wash, Mounds View, MN
File N. 6: 48'-4" from the Entrance Door. Doors Open.
Zero Degree Offset from Centerline.
Only Entry Automated Greeting and Blowers.
10:35:04 AM
26.6 seconds
10:35:30 AM
2/8/2022
10:35:04 10:35:14 10:35:24 10:35:34h.m.s.
Time, h.m.s.
50
60
70
80
90
dBA
Sound Pressure Level, dBA re. 20 µPa831_Data.006e - PA & Blowers - LAeq
831_Data.006e - PA & Blowers - LAeq - Running Leq
10:35:30
66.9 dBA
71.9 dBA
31.5 63 125 250 500 1K 2K 4K 8K 16KHz
1/3 Octave Band Frequency, Hz
20
30
40
50
60
70
80
90
dB
Sound Pressure Level, dBA re. 20 µPa(L) (A)
831_Data.006e - PA & Blowers - 1/1 Leq Spectrum + SLM - Linear
1000 (L) (A)
68.0 75.3 71.8
L50.0: 71.4 dBA
L10.0: 73.6 dBA
L1.0: 76.9 dBA
L90.0: 68.4 dBA
L95.0: 67.6 dBA
LMin: 64.6 dBA
831_Data.006e - PA & Blowers
1/1 Leq Spectrum + SLM - Linear
Hz dBA Hz dBA Hz dBA Hz dBA Hz dBA
31.5
63
125
250
500
1000
2000
4000
8000
16000
65.2 dBA
65.2 dBA
64.5 dBA
66.7 dBA
67.9 dBA
68.0 dBA
65.1 dBA
57.8 dBA
55.8 dBA
51.9 dBA
LMax: 80.8 dBA
Leq: 71.9 dBA
Calibration Frequency: 1 kHz
Initial Calibration: 94.0 dB
Final Calibration: 93.8 dB
Last Cal. Check: 2/8/22 @ 11:03 AM
Temperature: 26 °F
Wind Speed / Dir.: 6 MPH / SW
Humidity: 69%
Location:
Measurements:
Meteorology:
Preamplifier:
Location:
Project:
Engineer:
Microphone:
Last Calibrated:
Analyzer:
Calibrator:
Start Time:
End Time:
Run Time:
Christianson Co. - Tommy's Car Wash
P2816
Bloomington, MN
R.L. Skoug
Project No:
Date:
Calibration Check:
Acoustic Test Results
Minneapolis, Minnesota | o: 952.831.4646 | esi-engineering.com
Figure A5
Larson Davis PRM831 s/n 070949
Larson Davis 377C20 s/n 320010
Larson Davic CAL200 s/n 18322
December 9, 2021
Larson Davis 831 s/n 4694
Tommy's Car Wash, Mounds View, MN
10:56:20 AM
86.0 seconds
10:57:46 AM
2/8/2022
10:56:20 10:56:50 10:57:20 10:57:50h.m.s.
Time, h.m.s.
50
60
70
80
90
dBA
Sound Pressure Level, dBA re. 20 µPa831_Data.009e - LAeq
831_Data.009e - LAeq - Running Leq
10:57:46
72.8 dBA
76.0 dBA
31.5 63 125 250 500 1K 2K 4K 8K 16KHz
1/3 Octave Band Frequency, Hz
20
30
40
50
60
70
80
90
dB
Sound Pressure Level, dBA re. 20 µPa(L) (A)
831_Data.009e - 1/1 Leq Spectrum + SLM - Linear
1000 (L) (A)
72.9 81.0 76.1
L50.0: 76.0 dBA
L10.0: 76.8 dBA
L1.0: 77.3 dBA
L90.0: 75.1 dBA
L95.0: 74.8 dBA
LMin: 73.5 dBA
831_Data.009e
1/1 Leq Spectrum + SLM - Linear
Hz dBA Hz dBA Hz dBA Hz dBA Hz dBA
31.5
63
125
250
500
1000
2000
4000
8000
16000
73.7 dBA
68.0 dBA
71.1 dBA
73.2 dBA
73.1 dBA
72.9 dBA
67.0 dBA
59.1 dBA
52.5 dBA
45.9 dBA
LMax: 77.7 dBA
Leq: 76.0 dBA
File N. 9: 8'-6" from 1 Open Sidewall Louver.
Southwest Side of the Building.
Blowers On (Blowers Off Time Extracted).
DRAFT
Attachment E
Hilltop Concrete Sound Transmission Loss Test Report
Southlake Car Wash Noise Control – December 13, 2023
DRAFT
Attachment F
Tommy Car Wash Systems – Blower VFD Noise Report
Southlake Car Wash Noise Control – December 13, 2023
Tommy Car Wash Systems | 581 Ottawa Ave. | Holland, MI 49423 | tommycarwash.com.com
________________________________________________________________________________________
Sound Level Testing – Hudsonville 5/18/21
Introduction
Measurements of sound levels were collected on site to record noise levels
generated by the standard 18 blower motor configuration at the wash exit.
Measurements were taken between 10:00pm and 12:00am on May 18th at
the Hudsonville Location.
Instrumentation & Procedure
Measurements were recorded using an Extech Instruments Model 407730
Sound Level Meter. This meter is calibrated and meets the standards of the
National Institute of Standards and Technology and conforms with ISO 10012
and ANSI Z540-1-1994. Sound levels were recorded both at ground level as
well as at a height of 5 feet off the surface. Measurements were recorded as
an average of a 5 second period at each point. Samples were recorded with
minimum possible ambient noise pollution when applicable and with the
standard blower motor configuration. Procedure was repeated with blower
motor frequency adjusted in 10Hz increments from 60Hz to 10Hz.
Atmospheric & Ambient Conditions
Atmospheric data is taken from the weather station at Gerald R. Ford
International Airport and is shown in Table 1. Ambient sound levels were
recorded at the maximum distance from the tunnel exit with all wash
functions turned off. Ambient sound levels ranged from a minimum of 50dB
to a maximum of 60dB. It should be noted that while efforts were made to
prevent contamination of data from ambient conditions, some noise
pollution from the environment was unavoidable.
Table 1: Environmental Conditions During Test Period
Time & Date
Average
Temp
(F)
Avg.
Relative
Humidity
Wind
Direction
Avg. Wind
Speed
(MPH)
Precipitation
(in)
Ambient
Sound Level
(dB)
10:00pm-
12:00am
May 18th, 2021
67 64.5% E 4.6mph 0 50-60dB
________________________________________________________________________________________
Results
Recorded data for each position at ground level is shown below in Table 2.
This data is displayed in Figure 1. Recorded data for each position at 5ft
height is shown below in Table 3. This data is displayed in Figure 2.
Figure 1: Measured Sound Pressure Levels at Ground Height
40.0
50.0
60.0
70.0
80.0
90.0
100.0
110.0
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85Measured Sound Pressure Level (dB)Distance From Tunnel Exit (ft)
Sound Pressure Levels at Ground Height
60hz 50hz 40hz 30hz 20hz 10hz Ambient Minimum
________________________________________________________________________________________
Figure 2: Measured Sound Pressure Levels at 5ft Height
40
50
60
70
80
90
100
110
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85Measured Sound Pressure Level (dB)Distance From Tunnel Exit (ft)
Sound Pressure Levels at 5ft Height
60hz 50hz 40hz 30hz 20hz 10hz Ambient Minimum
________________________________________________________________________________________
Table 2: Measured Sound Levels at Ground Height
Distance (ft) 60hz 50hz 40hz 30hz 20hz 10hz
0 104.8 99.1 94.5 86.9 77.4 64.1
5 102.8 97.2 91.2 84.6 75.1 60.7
10 98.9 93.3 87.6 80.7 71.9 60.4
15 97.0 91.6 85.7 78.4 70.8 59.1
20 95.6 89.6 84.1 76.3 68.3 58.2
25 92.9 88.3 81.9 75.9 65.7 54.2
30 92.3 87.1 80.8 73.6 65.1 55.9
35 89.9 86.4 78.9 72.6 63.2 54.2
40 88.4 84.0 77.8 71.5 62.0 52.6
45 86.2 83.2 76.7 70.5 60.5 54.5
50 86.0 82.1 75.4 69.2 59.3 55.9
55 85.1 81.4 74.5 67.7 58.6 53.3
60 82.6 78.2 72.4 66.6 55.6 50.5
65 78.4 73.9 69.3 62.8 54.5 50.9
70 77.6 74.8 68.5 61.9 54.2 52.2
75 77.6 73.3 67.4 61.0 53.6 53.3
80 76.4 72.5 67.2 59.9 52.8 53.6
85 73.6 70.5 64.2 60.8 52.3 53.6
Table 3: Measured Sound Levels at 5ft Height
Distance (ft) 60hz 50hz 40hz 30hz 20hz 10hz
0 103.4 98 92.7 85.4 76.8 62.7
5 99.9 94.5 88.5 82 73.6 60.5
10 96.1 91.2 85.2 78.8 70.2 57.8
15 94.2 88.6 82.7 75.6 68.8 58.8
20 92.3 86.8 81.2 74.2 65.5 54.8
25 91.1 85.6 79.1 72.7 63.3 52.9
30 89 83.8 77.6 71.1 62.9 53.9
35 87.4 83.5 76.6 70.7 60.4 53
40 87.2 82.6 75.9 70.1 59.8 52.9
45 86.5 81.2 75.1 69.7 59.5 56.1
50 85.7 80.5 73.6 67.6 58.1 56.1
55 84.9 79.4 72.8 67.1 57 52.9
60 83.5 78.2 71.9 64.7 56.3 52.6
65 80.8 75.6 70 62.1 55.1 50.7
70 80.4 75.9 69.1 62.3 54.2 53.9
75 79.3 74.5 69.1 61.5 53.3 52.5
80 77.8 73.8 67.5 59.8 53.3 52.1
85 75.6 71 64.8 59.1 54.5 51.7
________________________________________________________________________________________
Conclusions
By varying the frequency of the blower motor, it was possible to achieve
sound pressure levels which did not exceed the ambient conditions at the
maximum recorded distance. It was not possible to record the true sound
level at these positions due to ambient sound conditions.
DRAFT
Attachment G
Tommy Car Wash Systems – Vacuum Muffler Noise Report
Southlake Car Wash Noise Control – December 13, 2023
Tommy Car Wash Systems | 581 Ottawa Ave. | Holland, MI 49423 | tommycarwash.com
________________________________________________________________________________________
1
TCWS Muffler Report
Introduction: Vacuum mufflers were tested at TX Hudsonville for 2 weeks’
time. The goal of this test, was to test three types of mufflers on site to
attempt to reduce the noise output of the vacuums without loss of
performance.
Methodology: Performance of the mufflers were tested with 4 criteria
1. Noise reduction (dB)
2. Additional Maintenance necessary / clogging (Yes or No)
3. Suction loss (kPa and % loss)
4. Aesthetics (Great, Good, Fair, Poor)
Results: Test results based on Methodology
1. BASELINE RESULTS (No mufflers attached)
a. Noise
i. Ambient (no vacs running): 65.7 dB (See figure 1.1)
ii. Running Vac with no muffler: 88.1 dB (See Figure 1.2
b. Additional Maintenance necessary / clogging: NO
c. Suction: 50 kPa/ 0%
d. Aesthetics: Great
_______________________________________________________________________________________
2
FIGURE 1.1 FIGURE 1.2
FIGURE 1.3
2. P-VAC-334 RESULTS
_______________________________________________________________________________________
3
a. Noise reduction (dB):
i. Reading: 77.6 dB (See Figure 2.1)
ii. Reduction: 10.5 dB
b. Additional Maintenance necessary / clogging
i. Yes: Minor (additional maintenance and clogging)
1. Reverse pulse vacs to help with this
2. Wash Mufflers to help with this
c. Suction loss (KPa and %)
i. Reading: 40kPa (see Figure 2.2)
ii. Loss: 10kPa – 20% loss in suction
d. Aesthetics
i. Good (See Figure 2.3)
Figure 2.1 Figure 2.2
_______________________________________________________________________________________
4
Figure 2.3: P-VAC-334
1. P-VAC-335 RESULTS
_______________________________________________________________________________________
5
a. Noise reduction (dB):
i. Reading: 79.1 dB (See Figure 3.1)
ii. Reduction: 9 dB
b. Additional Maintenance necessary / clogging
1. Yes: Minimal (additional maintenance, no
clogging)
a. Eventually replace filter of muffler.
c. Suction loss (KPa and %)
i. Reading: 50kPa (see Figure 3.2)
ii. Loss: 0kPa – 0% loss in suction
d. Aesthetics
i. Fair (See Figure 3.3)
FIGURE
3.1
FIGURE 3.2
_______________________________________________________________________________________
6
FIGURE 3.3 (P-VAC-335)
P2991 Christianson Companies – Southlake, TX Car Wash
DRAFT – Car Wash & Surrounding Area Zoning Map
December 13, 2023
Car Wash Project Site and Surrounding Zoning Map
Southlake, TX
Single Family Residential
Single Family ResidentialRetailRetail
OfficeRetail Commercial
Medium Density
Residential
Office
Commerical
Public / Semi-
Public
Office
Commerical
Low Density Residential
Keller, TX
Residential
Commercial
Property
Receiving
Day
(7AM-9PM)
Sundays
60 dBA
70 dBA
55 dBA
65 dBA
55 dBA
65 dBA
Night
(9PM-7AM)
Residential
Commercial
Property
Receiving
Day
(7AM-9PM)
Sundays
60 dBA
70 dBA
55 dBA
65 dBA
55 dBA
65 dBA
Night
(9PM-7AM)
City of Southlake Noise Code
Medium
Density
Residential
P2991 Christianson Companies – Southlake, TX Car Wash
DRAFT – Car Wash Noise Contour Plot – All Sources, No Mitigation
December 13, 2023
NOISE LEVEL KEY
≥ 85 dBA
< 85 dBA
< 80 dBA
< 75 dBA
< 70 dBA
< 65 dBA
< 60 dBA
< 55 dBA
< 50 dBA
< 45 dBA
< 40 dBA
< 35 dBA
NOISE LEVEL KEY
≥ 85 dBA
< 85 dBA
< 80 dBA
< 75 dBA
< 70 dBA
< 65 dBA
< 60 dBA
< 55 dBA
< 50 dBA
< 45 dBA
< 40 dBA
< 35 dBA
Car Wash Noise Contour Plot – All Sources On, No Mitigation
P2991 Christianson Companies – Southlake, TX Car Wash
DRAFT – Car Wash Noise Contour Plot – All Sources, No Mitigation
December 13, 2023
NOISE LEVEL KEY
≥ 85 dBA
< 85 dBA
< 80 dBA
< 75 dBA
< 70 dBA
< 65 dBA
< 60 dBA
< 55 dBA
< 50 dBA
< 45 dBA
< 40 dBA
< 35 dBA
NOISE LEVEL KEY
≥ 85 dBA
< 85 dBA
< 80 dBA
< 75 dBA
< 70 dBA
< 65 dBA
< 60 dBA
< 55 dBA
< 50 dBA
< 45 dBA
< 40 dBA
< 35 dBA
Car Wash Noise Contour Plot – All Sources On, North 6' Masonry Wall
6' Tall Masonry
Fence Location
P2991 Christianson Companies – Southlake, TX Car Wash
DRAFT – Car Wash Noise Contour Plot – All Sources, 40 Hz Blowers, 6' North Fence
December 13, 2023
NOISE LEVEL KEY
≥ 85 dBA
< 85 dBA
< 80 dBA
< 75 dBA
< 70 dBA
< 65 dBA
< 60 dBA
< 55 dBA
< 50 dBA
< 45 dBA
< 40 dBA
< 35 dBA
NOISE LEVEL KEY
≥ 85 dBA
< 85 dBA
< 80 dBA
< 75 dBA
< 70 dBA
< 65 dBA
< 60 dBA
< 55 dBA
< 50 dBA
< 45 dBA
< 40 dBA
< 35 dBA
Car Wash Noise Contour Plot – All Sources On, Blowers at 40 Hz, North 6' Masonry Wall
6' Tall Masonry
Fence Location
P2991 Christianson Companies – Southlake, TX Car Wash
DRAFT – Car Wash Noise Contour Plot – All Sources, 40 Hz and Vacuum Muffs, 6' North Fence
December 13, 2023
NOISE LEVEL KEY
≥ 85 dBA
< 85 dBA
< 80 dBA
< 75 dBA
< 70 dBA
< 65 dBA
< 60 dBA
< 55 dBA
< 50 dBA
< 45 dBA
< 40 dBA
< 35 dBA
NOISE LEVEL KEY
≥ 85 dBA
< 85 dBA
< 80 dBA
< 75 dBA
< 70 dBA
< 65 dBA
< 60 dBA
< 55 dBA
< 50 dBA
< 45 dBA
< 40 dBA
< 35 dBA
Car Wash Noise Contour Plot – All Sources On, Blowers at 40 Hz, Vacuum Mufflers, North 6' Masonry Wall
6' Tall Masonry
Fence Location
P2991 Christianson Companies – Southlake, TX Car Wash
DRAFT – Car Wash Noise Contour Plot – All Sources, 40 Hz and Vacuum Muffs, 8' North Fence
December 13, 2023
NOISE LEVEL KEY
≥ 85 dBA
< 85 dBA
< 80 dBA
< 75 dBA
< 70 dBA
< 65 dBA
< 60 dBA
< 55 dBA
< 50 dBA
< 45 dBA
< 40 dBA
< 35 dBA
NOISE LEVEL KEY
≥ 85 dBA
< 85 dBA
< 80 dBA
< 75 dBA
< 70 dBA
< 65 dBA
< 60 dBA
< 55 dBA
< 50 dBA
< 45 dBA
< 40 dBA
< 35 dBA
Car Wash Noise Contour Plot – All Sources On, Blowers at 40 Hz, Vacuum Mufflers, North 8' Masonry Wall
8' Tall Masonry
Fence Location