HomeMy WebLinkAboutNB 6 AUTO CTR LDSPKR 06-16-86 NEW BUSINESS
NO. 6
" Inter Com
DATE: JUNE 16, 1986
TO:
FROM:
SUBJECT:
WILLIAHA. HUSTON, CITY MANAGER
COI~UNITY DEVELOPMENT DEPARTMENT
TUSTIN AUTO CENTER LOUDSPEAKER CRITERIA
APPLICANT: THE IRVINE COMPANY
LOCATION:
REQUEST':
TUSTIN AUTO CENTER
APPROVAL OF Tile TUSTIM AUTO CENTER LOUDSPEAKER CRITERIA
RECOFg4ENDED ACTION:
Pleasure of the Council.
SUI~ARY:
On April 28, 1986, the Irvtne Company presented the Tustin Auto Center
Paging Impacts Study to the Planning Commission. At this time, the
Commission requested that the item be noticed in the Tustin News and that
certain concerned residents be notified through the mail.
On May 27, 1986, a public hearing was conducted to consider the Loudspeaker
Criteria. Numerous revisions were made to the original request and public
input was given. Staff recommended that the amended criteria be adopted
and the Commission by a vote of two ayes to one nde, adopted Resolution
No. 2334 approving the amended criteria (attached). At the June 2nd
meeting of the City Council, this item was appealed by the Council for
further study.
As a part of this report, an acoustical engineer will present a computer
analysis of the loudspeaker impacts.
ANALYSIS AND CONCLUSIONS:
The original Loudspeaker Criteria for the Auto Center was presented to the
Planning Commission in July 1985. This criteria was not adopted by the
Commission due to a lack of information regarding the use of handheld
paging systems. The Irvine Company prepared the attached Paging System
Study and this was presented to the Commission on April 28, 1986. Staff
recommended the "Pleasure of the Commission" and to direct preparation of
an appropriate Resolution.
Loudspeaker Criteria
June 16, 1986.
Page two
The Commission requested that this item be advertised in the Tustin News
and that notices be mailed to interested citizens. On May 27, 1986, staff
presented Resolution. No. 2334 to the Commission. This Resolution contained
numerous revisions to the original criteria as outlined in the attached
staff report dated May 27, 1986.
The public hearing was conducted and numerous citizens spoke on the item.
Further revisions were made to' the Resolution of approval and its final
adopted form is attached. The Planning Commission followed staff's
recommendation and confirmed that the revised Loudspeaker Criteria was
appropriate for adoption and approved the criteria by adoption of
Resolution No. 2334.
On June 2, 1986, during the City Council meeting, further concerns were
raised regarding the Planning Commission's adoption of this criteria. The
City Council appealed this item for further study. Staff has mailed
notices to the same citizens who were previously notified. This list is
attached in the May 27, 1986, staff report to the Planning Commission.
As part of this hearing, the Irvine Company will pmesent'a computer
analysis of the loudspeaker impacts. Attached is a.copy of the Paging
Systems Study which includes all pertinent information r~garding this
issue.
LAURA CAY P~UP' ~
Assistant Planner
ED-WARD M. K~NIGHT
Senior Planner
EMK:LCP:em
Attachments:
April 28, 1986 Staff Report
May 27, 1986 Staff Report
Resolution No. 2334
Enclosure: Tustin Auto Center Paging Impacts Study
Corn munity Development Department
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RESOLUTION NO. 2334
A RESOLUTION OF THE PLANNING COMMISSION OF THE
CITY OF TUSTIN,' CALIFORNIA, APPROVING THE
LOUDSPEAKER CRITERIA FOR THE TUSTIN AUTO CENTER
The Planning Commission of the City of Tustin, California, does hereby
resolve as follows:
The Planning Commission finds and determine as follows:
The Planning Commission adopted the revised Master Development
Plan for the Tustin Auto Center on April 28, 1986, this approval
did not include the Loudspeaker Criteria.
B. The Planning Commission, reviewed and considered the revisions
to the Loudspeaker Criteria on May 27, 1986.
Co
De
The Loudspeaker Criteria as proposed by the Irvine Company has
been revised as shown in Exhibit "A", Sound System standards,
which shall be the approved Sound System Standards.
The establish~nt, maintenance and operation of the loudspeaker
systems will not be injurious or detrimental to the property'and
improvements in the neighborhood of the subject property, nor to
the general welfare of the City of Tustin, and should be
approved for use under the standards outlined on Exhibit "A".
II.
The Planning Commission of the City of Tustin does hereby approve the
revisions to the Loudspeaker Criteria for the Tustin Auto Center
based upon the following findings:
Ae
The Loudspeaker Criteria as revised in Exhibit "A" will not,
under the circumstances of this case, be detrimental to the
health, safety, morals, comfort, or general welfare of the
persons residing or working in the neighborhood of such proposed
use.
All noise created by the use of loudspeaker systems in the
Tustin Auto Center shall not exceed the noise levels allowed by
Tustin's Noise Standards, Sections 4600-4625 of the Tustin
Municipal Code.'
~Y
PASSED AND ADOPT[O at a requla~r~eetlng of the Tustin Planning Commission,
held On the ~Tl~tlay of -~7~/F~ , 1986.
Resolution No. 2334
Page two
Exhibit "A"
SOUND SYS-FE)! STAJIDARDS
Any sound system installation within the Tustin Auto Center shall conform
to the following standards:
All dealers are encouraged to use a hand held paging system. In the
event that use of outdoor loudspeakers is necessary, no dealer will be
authorized for an exclusive-use of outdoor loudspeakers, a combination
of loudspeakers and hand held paging may be authorized upon review of
the system by the City of Tustin.
In the event that loudspeakers must be used, a dealer's lot shall be
covered by multiple zones so that enunciation through a loudspeaker
occurs on a controlled area of the parcel rather than across the entire
lot.
e
Should a dealer choose to use some outdoor loudspeakers, the use of
this system is limited to operation between the hours of. 8:00 a.m. to
6:00 p.m., Monday through Friday. Should a dealer wish to either
expand these hours or days of use, approval of the Planning Commission
must be obtained. In no event shall any use of outdoor speakers be
authorized for operation on Sundays.
All loudspeakers shall be mounted at a 75 degree angle facing the
ground to avoid voice travel. All loudspeakers mounted on perimeter
walls shall be located at least two (2) feet below the 'top of the wall.
All loudspeakers shall be directed toward the interior of each lot.
Each speaker layout system shall be subject to review and approval by
the Community Development Department.
6. Whenever possible, loudspeakers shall be placed within service
buildings'rather than on the outside of the structure.
7. Whenever possible, loudspeakers shall be placed in such a manner to
prevent "bouncing" of sound off a nearby building.
8. All outdoor loudspeakers shall be set at a volume level no louder than
75 dB(A).
9. Prior to installation of a loudspeaker system, each dealer shall obtain
any necessary building permit(s) from the City of Tustin. Upon
installation of the system and as a condition of final approval of work
authorized by these permit(s), sound readings shall be taken of that
dealership's loudspeaker impacts on adjacent land uses, and the speaker
volumes shall be adjusted so that they do not exceed the impacts
stipulated below. Further, the speaker installer or sound engineer
shall advise the City in writing that the loudspeaker volume adjustment
has been mechanically or electrically locked off at 75 dB(A) or lower,
to preclude arbitr)rily increasing the volumes at a later date.
CommuniW Development DeD~'Ir't-"te~
Resolution No. 2334
Page three
10. Prior to the actual use of any loudspeaker system, an inspection shall
be made by the City of Tusttn to ensure that the system is operating
according to all sound system criteria, both on and off site.
[[. Pertodtc random Inspections may be conducted by the City to ensure
maintenance of the maximum 75 dB(A) sound level ltmtt. Should any
system be found tn violation of this requirement or any of the
standards stated above, the city may require that the. use of the
loudspeaker system be discontinued until all standards have been
satisfactorily complied with.
Maximum sound levels at adjacent property ltnes shall be:
a. 35 dB(A) to any residence along Browning Avenue;
b. 50 dB(A) to the outside of the soundwall along the property
line of any residence abutting Jamboree Road; and
Ce
60 dB(A) to any adjacent commercial uses which occur outside
of the Auto Center. {This level is limited to five (5)
minutes in any hour, overall a maximum of 60 dBA is allowed).
~ Community Development Department
SI'ATE OF ¢.ALIFORNIA)
COUNI'Y OF ORANGE )
CITY OF TUSTIN )
I, PENNI FOLEY, the undersigned, hereby certify that I am the
Recording Secretary of the Plann~j)~9~mtsslon of the City of Tusttn,
California; that Resolution No.~ was duly passed and adopted at~/
ng of the Tus' In Planning Commission, held on the~.~~
a regular.~m~.eti lg ~.~
day of .~.~..~~,
Report to the
Planning Commission
ITEM ~ 7
DATE:
SUB3ECT:
PROPERTY
OWNERS:
PlAY 27, 1986
TUSTIN AUTO CENTER LOUDSPEAKER CRITERIA
THE IRVI#E COMPANY
SSO NEWPORT CENTER DRXYE
NEWPORT BEACH, CA. 92660-9959
RECQI~EliDED ACTION:
That the Planning Commission approve the revised Loudspeaker Criteria for* the
Tustln Auto Center by the adoption of Resolution No. 2334.
SU~RY:
On April 28, 1986, the Planning Commission reviewed The Tustin Auto Center
Loudspeaker Criteria. At this time, the Irvine Company presented a computer
analysis and paging system study for the Commission's consideration.
Staff had r~commended that the Commission direct staff to prepare an acceptable
resolution of approval for the Criteria. However, the Commission had requested
that this item be noticed for public hearing in the Tustin News and also that
notices be sent to interested parties. A list of the public notice circulation
has been attached for your review.
At this time, the Loudspeaker Criteria is presented as a public hearing.
Another presentation will be made by the Irvine Company and the sound
analyst, David Dubbtnk Associates. Both public and Commission comments will be
taken to ensure proper coverage of all issues involved in this matter.
As requested by the Commission, staff has prepared Resolution No. 2334. This
resolution tncludes numerous revisions to the previously presented criteria as
outltned below. The proposed revisions were presented to The Irvine Company
prior to this hearing.
ANALYSIS AND CONCLUSZON:
As covered in Exhibit No. 1, the revisions-to the Loudspeaker Criteria are
found in the sound system standards section of the previously submitted crt tera
(Exhibit No. 2). The revisions to the sound system standards include:
Planntng Commission Report
May 27, 1986
Page two
Dealers are encouraged to use etther a hand held paging system or a
combination of loudspeakers and hand held pagers. Exclusive use of
loudspeakers is prohibited.
The hours of operation of the loudspeakers have been limited to 8:00
a.m. to 6:00 p.m., Monday through Friday. An expansion of the days or
hours of operation must be approved by the Planning Commission. In no
event shall any loudspeaker system be used on Sundays.
All loudspeakers shall be mounted at a 75~ angle facing the ground to
avoid noise travel.
No speakers shall face Auto Center Drive unless blocked by another
building.
All loudspeakers shall be set at 75 db(A) as opposed to the previously
proposed 80 db(A) level.
The City shall inspect all louUspeaker systems for compliance to all
Sound System Standards and to ensure that the volume level is
"locked-off".
e
The City may make random periodic inspections of all loudspeaker
systems used in the Auto Center. Should any violations be found, the
use of loudspeakers shall be discontinued until all standards have been
met.
Staff contends that these revisions will reduce the overall impact of the
loudspeaker systems on the existing and future Tustin residents. As revised,
:he Loudspeaker Criteria, will provide for an acceptable mix of pagers and
loudspeakers considered appropriate for the Tustin Auto Center.
LCP:pef
Attachments:
Resolution No. 2334
Exhibit 1
Exhibit 2
Public Hearing Mailing List
Notice of Public Hearing
Senior Planner
SOUND SYSTEM REVISmONS
SOUND SYSTEM STANDARDS'
Any sound system installation within the.Tustln Auto Center shall conform
to the following standards:
All dealers are encouraged to use a hand held paging system. In the
event that use of outdoor loudspeakers is necessary, no dealer will be
authorized for an exclusive use of outdoor loudspeakers, a combination
of loudspeakers and hand held paging may be authorized upon review of
the system by the City of Tusttn.
In the event that loudspeakers must be used, a dealer's lot shall be
covered by multiple zones so that enunciation through a loudspeaker
occurs on a controlled area of the parcel rather than across the entire
lot.
Should a dealer choose to use some outdoor loudspeakers, the use of
this system is limited to operation between the hours of 8:00 a.m. to
6:00 p.m., Monday through Friday. Should a dealer wish to either
expand these hours or days of use, approval of the Planning Commission
must be obtained. In no event shall any use of outdoor speakers be
authorized for operation on Sundays.
All loudspeakers shall be mounted a~ a 75 degree angle facing the
ground to avoid voice travel. All loudspeakers mounted on perimeter
walls shall be located at least two (2) feet below the top of the wall.
All loudspeakers shall be directed toward the interior of each lot. In
no event shall any speakers face Auto Center Drive, unless shielded by
another building.
6. Whenever possible, loudspeakers shall be placed within service
buildings rather than on the outside of the structure.
7. Whenever possible, loudspeakers shall be placed in such a manner to
prevent "bouncing" of sound off a nearby building.
8. All outdoor loudspeakers shall be set at a volume level no louder than
75 dB(A).
Prior to installation of a loudspeaker system, each dealer shall obtain
any necessary building permit(s) from the City of Tustin. Upon
installation of the system and as a condition of final approval of work
authorized by these permit{s), sound readings shall be taken of that
dealership's loudspeaker impacts on adjacent land uses, and the speaker
volumes shall be adjusted so that they do not exceed the impacts
stipulated below. Further, the speaker installer or sound engineer
shall advise the City in writing that the loudspeaker volume adjustment
has been mechanically or electrically locked off at 75 dB(A) or lower,
to preclude arbitrarily increasing the volumes at a later date.
Sound System Standards
Page Two
10. Prior to the actual use of any loudspeaker system, an inspection shall
be made by the City of'Tusttn to ensure that the system is operating at
a level of 75 dB(A) or lower, and to check that the systems volume has
been "locked-off."
11. Periodic random inspections may be conducted by the City to ensure
maintenance of the maximum 75 dB(A) sound level limit. Should any
system be found in violation of this requirement or any of the
standards stated above, the city may require that the use of the
loudspeaker system be discontinued until all standards have been
satisfactorily complied with.
Maximum sound levels at adjacent property lines shall be:
Ce
35 dB(A) to any residence along Browning Avenue;
55 dB(A) to the outside of the soundwall along the property
line of any residence abutting Jamboree Road; and
65 dB(A) to any adjacent commercial uses which occur outside
of the Auto Center. (This level is limited to five (5)
minutes in any hour, overall a maximum of 60 dBA is allowed).
TUSTIN AUTO CENTER
LOUDSPEAKER CRITERIA
In light of the City's and the Developer's mutual concern to protect nearby
residents and future land users from undue noise intrusion by the Tustin
Auto Center, the following Criteria has been developed for the use of any
amplification system(s) within the project. The Criteria is based on an
acoustical analysis prepared by Marshall Long ~, Associates for the McLean
Cadillac paging system, which will be the dealership located nearest to any
existing or future residences. A copy of this report is attached for reference,
and is summarized as follows:
Per Tustin Noise Ordinance adopted July 21, 1980, noise impacts
to any residential area shall 'not exceed 55 dB(A) from the hours
of-7-:00-a.-m. - 10:0ffp. m. Any speech or simple tone noise shall
require a further noise level reduction of $ dB(A). Conversely,
the allowable noise level shall be increased by 10 dB(A) for any
sound impacts which occur ~ minutes or less per hour, as is typical
for auto dealers~ paging systems. Cumulatively, these standards
allow a maximum noise impact from a typically operated amplification
system of 60 dB(A).
2. The analysis is based on the following conditions and is thereby
considered "worst-case":
No allowance has been made for future background traffic
noise along Jamboree Road, which will eventually reduce
impacts of noise generated within the Auto Center.
No allowance has been made for any sound attenuation measures
which will be taken by the future residential project to be built
between Browning and Jamboree Roads. Due to major noise
impacts to that project from traffic on the freeway, on Jamboree
Road, and on Laguna Road, the residential development will be
enclosed by a sound wall and will include other noise attenuation
measures which cumulatively serve to reduce noise levels by at
least 7 dB(A) to the nearest.backyard along Jamboree Road and
at least 25 dB(A) inside the nearest unit. These noise reductions
are not taken into account in the noise limits established by this
Criteria.
The noise analysis assumes that loudspeakers on the project's
perimeter are located 2~ below the perimeter wall, are directed
away from the perimeter wall, and are set at 80 dB(A).
Computer analysis establishes that in light of the above conditions,
worst-case impact of loudspeakers placed along the Jamboree Road
dealer's property line will be as follows:
35 dB(A) to the nearest Browning Avenue resident prior to
the construction of any housing units within the future resi-
dential project which separates Browning Avenue from the Auto
Center. According to the "Typical Noise Levels (A-Weighted
Scale)" exhibit which was prepared under the project's EIR in
1984, 35 dB(A) is equivalent to the sounds to be heard inside
a library or during a quiet rural night. Noise measurements
which were taken on September 17, 1984 by John Hillard S
Associates of Tustin indicated that at three points measured
along Browning Avenue between Bryan Avenue and Laguna
Road, the present daytime sound levels range from the Iow -
high 60 dB(A) levels. Consequently, 35 dB(A) impacts from
the Auto Center will be perceived as insignificant.
be
60 dB[A] maximum impact to the nearest residential property
line along Jamboree Road prior to the construction of the
residential sound wall or other attenuation measures. By law
the noise impacts to this property cannot exceed 65 CNEL,
which is a 24-hour averaged noise measurement. The Auto
Center's maximum impa~:t of 60 dB(A] occurring for five minutes
per hour between 7:00 a.m. and 10:00 p.m. is the equivalent
of a CNEL level of 48.6 dB, and is consequently well below
allowable limits and below the traffic impacts created along
Jamboree Road or the freeway.
Table #10 of'the Marshall Long analysis represents specific
test data under which a paging system set at 80 dB(A) was
measured at the nearest residential property line at levels
which ranged between 49.3 and 54,6 dB. This further confirms
that the 60 dB(A) impact would be both a maximum and a worst-
case condition.
SOUND SYSTEM STANDARDS
In light of the above data, any sound system installation within the Tustin
Auto Center shall conform to the following standards:
1. Whenever possible, dealers are encouraged to use hand-held paging
devices rather than loudspeaker systems for maximum sound attenuation.
In the event that loudspeakers must be used, a dealer's lot shall
be covered by multiple zones so that enunciatiOn through a loud-
speaker occurs on a controlled area of the parcel rather than across
the entire lot.
e
e
Loudspeakers may not be used prior to 8:00 a.m. or after 7:00 p.m.
If, at any time, a dealer shall deem it critical to his/her business
operation to use any loudspeakers at an earlier or later hour, specific
Planning Commission approval must first be obtained.
Loudspeakers along the perimeter of the project or that are not
directly shielded by a building shall be placed at least 2' below
the top of the perimeter wall which surrounds that dealer's property.
All loudspeakers shall be directed toward the interior of the project
and away from the perimeter property line(s).
Whenever possible, loudspeakers shall be placed within service
buildings rather than on the outside of the structure.
Whenever possible, loudspeakers shall be placed in such a manner
to prevent "bouncing" of sound off of a nearby building.
Prior to installation of a loudspeaker system, each dealer shall obtain
any necessary building permit(s~} from the City of Tustin. Upon
installation of the system and as a condition of final approval of work
authorized by these permit(s), sound readings shall be taken of that
dealership's loudspeaker impacts on adjacent land uses, and the speaker
volumes shall be adjusted so that they do not exceed the impacts
stipulated below. Further,-the speaker installer or sound engineer
shall advise the City in writing that the loudspeaker volume adjustment
has been mechanically or electrically locked off to preclude arbitrarily
increasing the volumes at a later date.
Maximum sound levels at adjacent property lines shall be:
a. 35 dB(A) to any residence along Browning Avenue.
b. 55 dB(A) to the outside of the soundwall along the
property line of any residence abutting Jamboree Rd.
c. 65 dB(A} to any adjacent commercial uses which occur
outside of the Auto Center.
120
110
-- 100
-- 90
-- 80
-- 70
-- 60
50
40
-- 30
20
10
0
COMMON INDOOR
NOISE LEVELS
COMMON OUTDOOR
NOISE LEVELS
ROCK BAND
FOOD BLENDER AT 3 FEET
GARBAGE DISPOSAL AT S FEET
VACUUM CLEANER AT 10 FEET
CONVERSATION AT 3 FEET
LARGE BUSINESS OFFICE
QUIET OFFICE
LIBRARY
CHAIN SAW AT 2 FEET
GAS LAWN MOWER AT 3'FEET
2-ENGINE PROP TAKEOFF (1000')
DIESEL TRUCK AT 50 FEET
1-ENGINE PROP TAKEOFF (1000~
AUTOMOBILE AT SO FEET
HEAVY TRAFFIC AT 300 FEET
QUIET URBAN DAYTIME
QUIET RURAL NIGHTTIME
THRESHOLD OF HEARINQ
TYPICAL NOISE LEVELS
(A-WEIGHTED SCALE)
CITY OF TUSTIN
EXHIBIT 20
Knox.
1,3471Falmouth P1.
in, CA 92680
lrance Dalen Pl.
1921 Burnt Mill Rd.
Tusttn, CA 92680
lora I. Avey
lv12 Burnt Mill Rd.
Tustin, CA 92680
Clark Marks
[672 Lear Lane
Tusttn, CA 92680
Ern4e Julian
1702 Saybrook Ln.
Tusttn, CA 92680
Edward Retntg
1792 Andrews St.
Tustin, CA 92680
HUbert Clark
1942 San Juan St.
Tusttn, CA 92680
Darlene Jones
13120 Hickory Branch Rd.
Tusttn, CA 92680
Parker Hart
13042 Ranchwood Rd.
Santa Aha, CA 92705
Matra Coombs
1831 Stonehenge Dr.
Tustin, CA 92680
Mrs. Jackte Haney
13352 Ntxon Cir.
Tusttn, CA 92680
Oscar Barnhart
13872 Karen Way
Tustin, CA 92680
Charles Larktn
1802 Andrews Pl.
Tusttn, CA 92680
Donald Robbtns
13502 Falmeuth Dr.
Tustin, CA 92680
Robert Moberg
13541Falmouth Dr.
Tusttn, CA 92680
Robert Clevenger
1761 Andrews Pl.
Tustin, CA 92680
Drake Hawkins
1741 Andrews Pl.
Tustin, CA 92680
Fredrick Wetshar
13512 Farmington
Tusttn, CA 92680
James Niemiec
1841 Stonehenge Dr.
Tustin, CA 92680
John Lundy
1731 Saybrook Ln.
Tusttn, CA 92680
Albert Worthfng
1881 Bryan Ave.
Tustin, CA 92680
James Hughes
1752 Lance Dr.
Tustin, CA 92680
Robert Greene
13166 Wtckshire Ln.
Santa Aha, CA 92705
Robert Dawson
13022 Ranchwood Rd.
Santa Aha, CA 92705
James Stone
13302 Chirping Sparrow
Tustin, CA 92680
Mr. & Mrs. Michael Caruso
1842 Bent Twig Ln.
Tusttn, CA 92680
Mrs. Bonnie Perkins
13382 Epplng Way
Tusttn, CA 92680
Mr..amuel Francis
1792 San Juan
Tusttn, CA 92680
Charles Shoemaker
1962 Sierra Vista Dr.
Tustin, CA 92680
Stanley Taylor
13532 Farmtngton Rd.
Tusttn, CA 92680
Donald Marsh
1791 Lance Dr.
Tusttn, CA 92680
Helen Jensen
1922 Red Mill
Tusttn, CA 92680
OFFICIAL NOTICE
OF
PtJBLJC HEARING
lqJb'llN PI.ANNING COMMI~ION
NOTICE OF PUBLIC HEARING
TUSTIN PLANNING COMMISSION
Notice Is hereby gtven that the Planning Commission of the Ctty of Tustin,
California, will conduct a public hearing on May 27, i986 at 7:30 p.m. in the
Council Chamber, '300 Centennial Way, Tusttn, California, to consider the
following:
2. TUSTIN AUTO CENTER: LOUDSPEAKER CRITERIA:
The Irvtne Co,any has prepared a loudspeaker/paging study for the noise
impacts to the residential areas adjacent to the Tustin Auto Center. This
study and the actual loudspeaker criteria, will be presented to the Planning
Commission for their review.
This project is catagorically Exempt from the.California Environmental
Quality Act (Section 15321).
Information relative to these items is on file in the Community Development
Department and is available for public .inspection at City Hall. Anyone
interested in the above he,rings may appear and be heard at the time and place
noted above or may call the Community Development Department at (714) 544-8890
ext. 250.
Mary E. Wynn, City Clerk
Publish: Tustin News
May 15, 1986
Report to the
Planning Commission
ITEM
DATE:
SUBdECT:
PROPERTY
OWNER:
APRZL 28; 1986
TUST]N AUTO C~NTER LOUDSPEAKER CRITER]A
THE TR$]NE COHPANY
SO0 NEWPORT CZNTER DRIYE
#E~PORT BEACH. CA
RECQI~IENDED ACT]ON:
Pleasure of the Commission. Dtrect staff to prepare an appropriate resolution.
BA~GROUND AND DTSCUSS]ON:
Last 3uly, the Tusttn Auto Center crttarta was presented to the P]anntng
Coninlsston. One sectton of the orlgtna] *crttarla tncluded the proposed notse
tmpacts of the loudspeaker systems that.may be used. The CommtsMon had ratsed
concerns over the actual Impact to the existing and future* residents near the
Auto Center. Subsequently, the Commission dtd not approve the proposed crtterta
and requested that the Irvtne Company Investigate the use of a pagtng system and
to prepare further Information on revtsed loud speaker criteria.
The Irvtne Company, as requested, has Investigated the use of pagtng systems.
As outltned tn the attached report, the study detarmtned that the exclusive use
of a paging system would not be effective. Therefore, according to the study,
some use of loud speaker systems ts considered necessary.
Atteched ts the ortgtnal loud speaker crtterta as previously proposed. The
Irvtne Company ts not proposing to change thts criteria, however addtttona~
studtes have been prepared. Also, attached ts a copy of a letter to Bonnte
Holmes from a restdent who 1lyes next to Chic Iversen Porsche/Audt. Thls
restdent 11yes adjacent to thts dealership whtch currently uses an outdoor
loudspeaker system. All reports and attachments are tncluded tn the enclosed
Tusttn Auto Center Pagtng Impacts Study.
Planning' Co,,,i sst on Report.
Apr11 28. 1986
9age 1~o
The Irvtne Company, In association wtt~ David Oubbtnk Associates, has prepared
de~atled computer analysts whtch w~11 Illustrate ~he actual noise effects. ThJs
analys~s ~tll be presen~d to the Commission tn hopes of further explanation
the actual no~se impact ~o the' existing residents along Browntng and to the
future residents of the Phase One Restden~al Area.
Assistant Pla~ner
EDWARD M. I~IIGHT~ ~ A
Sentor Planner
LCP:pef
Enclosure: Tustin Auto Cen~er Pagtng Impacts Study
TUSTIN AUTO CENTER
PAGING IMPACTS
STUDY
,April 14, 1986
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25'.
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RESOLUTION NO. 2334
A RESOLUTION OF THE PLANNING COMMISSION OF THE
CITY OF TUSTIN, CALIFORNIA, APPROVING THE
LOUDSPEAKER CRITERIA FOR THE TUSTIN AUTO CENTER
The Planning Commission of the City of Tustin, California, does hereby
resolve as follows:
I. The Planning Commission finds and determine as follows:
A. The Planning Commission adopted the revised Master Development
Plan for the Tustin Auto Center on April 28, 1986, this approval
did not include the Loudspeaker Criteria.
B. The Planning Commission, reviewed and considered the revisions
to the Loudspeaker Criteria on May 27, 1986.
C. The Loudspeaker Criteria as proposed by the Irvine Company has
been revised as shown in Exhibit "A", Sound System standards,
which shall be the approved Sound System Standards.
D. The establishment, maintenance and operation of the loudspeaker
systems will not be injurious or detrimental to the property and
improvements in the neighborhood of the subject property, nor to
the general welfare of the City of Tustin, and should be
approved for use under the standards outlined on Exhibit "A".
II. The Planning Commission of the City of Tustin does hereby approve the
revisions to the Loudspeaker Criteria for the Tustin Auto Center
based upon the following findings:
A. The Loudspeaker Criteria as revised in Exhibit "A" will not,
under the circumstances of this case, be detrimental to the
health, safety, morals, comfort, or general welfare of the
persons residing or working in the neighborhood of such proposed
use.
B. All noise created by the use of loudspeaker systems in the
Tustin Auto Center shall not exceed the noise levels allowed by
Tustin's Noise Standards, Sections 4600-4625 of the Tustin
Municipal Code.
PASSED AND ADOPT�q at a re ular meeting of the Tustin Planning Commission,
held on the .; %�1ay of 1986.
NNI FOLEY, Recordingcretary
--A9 uAd-4-
KATHY WEIL, Chairman
Resolution No. 2334
Page two
Exhibit "A"
SOUND SYSTEM STANDARDS
Any sound system installation within the Tustin Auto Center shall conform
to the following standards:
1. All dealers are encouraged to use a hand held paging system. In the
event that use of outdoor loudspeakers is necessary, no dealer will be
authorized for an exclusive use of outdoor loudspeakers, a combination
of loudspeakers and hand held paging may be authorized upon review of
the system by the City of Tustin.
I2. In the event that loudspeakers must be used, a dealer's lot shall be
covered by multiple zones so that enunciation through a loudspeaker
occurs on a controlled area of the parcel rather than across the entire
1-o t.
3. Should a dealer choose to use some outdoor loudspeakers, the use of
this system is limited to operation between the hours of 8:00 a.m. to
6:00 p.m., Monday through Friday. Should a dealer wish to either
expand these hours or days of use, approval of the Planning Commission
must be obtained. In no event shall any use of outdoor speakers be
authorized for operation on Sundays.
4. All loudspeakers shall be mounted at a 75 degree angle facing the
ground to avoid voice travel. All loudspeakers mounted on perimeter
walls shall be located at least two (2) feet below the top of the wall.
5. All loudspeakers shall be directed toward the interior of each lot.
Each speaker layout system shall be subject to review and approval by
the Community Development Department.
6. Whenever possible, loudspeakers shall be placed within service
buildings rather than on the outside of the structure.
7. Whenever possible, loudspeakers shall be placed in such a manner to
prevent "bouncing" of sound off a nearby building.
8. All outdoor loudspeakers shall be set at a volume level no louder than
75 dB (A).
9. Prior to installation of a loudspeaker system, each dealer shall obtain
any necessary building permit(s) from the City of Tustin. Upon
installation of the system and as a condition of final approval of work
authorized by these permit(s), sound readings shall be taken of that
dealership's loudspeaker impacts on adjacent land uses, and the speaker
volumes shall be adjusted so that they do not exceed the impacts
stipulated below. Further, the speaker installer or sound engineer
shall advise the City in writing that the loudspeaker volume adjustment
has been mechanically or electrically locked off at 75 dB(A) or lower,
to preclude arbitrarily increasing the volumes at a later date.
Resolution No. 2334
Page three
10. Prior to the actual use of any loudspeaker system, an inspection shall
be made by the City of Tustin to ensure that the system is operating
according to all sound system criteria, both on and off site.
11. Periodic random inspections may be conducted by the City to ensure
maintenance of the maximum 75 dB(A) sound level limit. Should any
system be found in violation of this requirement or any of the
standards stated above, the city may require that the use of the
loudspeaker system be discontinued until all standards have been
satisfactorily complied with.
Maximum sound levels at adjacent property lines shall be:
a. 35 dB(A) to any residence along Browning Avenue;
b. 50 dB(A) to the outside of the soundwall along the property
line of any residence abutting Jamboree Road; and
c. 60 dB(A) to any adjacent commercial uses which occur outside
of the Auto Center. (This level is limited to five (5)
minutes in any hour, overall a maximum of 60 dBA is allowed).
STATE OF CALIFORNIA)
COUNTY OF ORANGE )
CITY OF TUSTIN )
I, PENNI FOLEY, the undersigned, hereby certify that
Recording Secretary of the P1 an4Pa
Wnn
i ssi on of the City
California; that Resolution No.as duly passed and
a regular eting of the Tu s n Commission, held on
day of r Y14.iA19 .
WNIFO Y
Recording Secretary
I am the
of Tustin,
adopted a�
the ��
TUSTIN AUTO CENTER PAGING IMPACTS STUDY
In response to community concerns regarding noise generated by
automobile dealers' loudspeaker systems at the Tustin Auto Center,
the following study has been made of sound system alternatives and
is presented for Planning Commission review. This study contains
the following elements:
A. Auto Center Paging System analysis, as prepared by
JDR Communications System Consultants.
B. Summary of interviews regarding paging systems.
C. Proposed Loudspeaker Criteria for the Tustin Auto Center.
D. Noise Analysis of the McLean Cadillac Paging System,
prepared by Marshall Long Acoustics.
E. Sound Information Summary with audio-visual presentation.
NWWR
Communications Systems Consultants
Bonnie Holmes
THE IRVINE COMPANY
Irvine Retail Property Company
P.O. BOX I
Newport Beach Ca 92658-8904
11-21-95
Consultation Report Re: Auto Center Paging System.
The potential problem of residential complaints concerning noise
generated by auto dealership lousdspeaker public-address systems
is not a new one. However, only in the areas of planned
communities or in upper middle-class and above neighborhoods
have any solutions been seriously explored.
Some of the methods that have been explored or attempted include
the following:
1. HOUSE PHONES: A large number of pole mounted and wall hung
telephones located at several easily accessable places
thoughout the dealership complex. The idea was that
whoever needed to be reached would not be very far from
any one of said phones.
There were two problems, however; one was the assumption
that the office knew approximately where the person was
supposed to be at any given time so that a phone in that
genreal area could be called and whoever answered could
then motion the intended recipient to that phone. As it
turned out, phones were ringing much of the time in an
attempt to "chase down" the intended party who was not
where they thought he was! The other problem was the
ringing of the phones in service yards and parking lots
which was almost as much of an annoyance as the P.A.
system it replaced. The on-going telephone service
charges for all of those phones was not to be ignored
either.
2. THE BILLBOARD CONCEPT: A couple of dealers in Northern
California tried a large stadium type lighted "scoreboard"
which showed the contactee's name and where he was
supposed to call or report. The message would stay on the
board until he responded.
1
30808 Bradford Pl. Santa Ana, Ca 92707
Box 7054 Newport Beach, Ca 92658-0054
(714) 720-3119, (714) 742-7717
The system was silent and bothered no one and it was large
enough for all to see in the service area. However,
unless someone knew to periodically look at the board, a
message might be there for a great length of time before
the intended recipient of the message actually responded.
Not everyone had a good view of the board, either.
3. THE DEPARTMENT STORE TONE SYSTEM: One dealer in Scottsdale
tried the tone system used in many department stores.
This system consists of a pleasant series of tones that
are "coded" to indicate who is supposed to respond.
The system worked very well in the showrooms and was
"secure" in that no one but the staff knew who was being
"paged". It was a dismal failure in the service
departments and the back lots, however, because the tones
were too soft and "pleasant" to be heard above the sound
of impact wrenches and other tools. In addition, it was
still a SOUND that carried into the surrounding area and
still generated some complaints.
4. PERSONAL PAGERS: The only system of communication that has
been found to be workable and the method that all of the
above experimentors eventually adopted uses personal
pagers.
Almost all personal pagers are under 2"x4"xl" in size and
are usually worn on the belt. Most organizations and
individuals who use such pagers lease the pagers and the
paging service from a paging company (similar to an
answering service) because the cost to set up the
appropriate radio-frequency repeater (mountaintop
transmitter) system is too great to be borne by one
company by itself.
There are three general types of pagers in use today:
a. TONE -ONLY PAGERS:
These are the type commonly referred to as
"beepers"; they emit one or more tones (beeps)
repeated several times to let the wearer know to
call a predetermined answering service or his
office or whatever is agreed upon.
A refinement of the tone -only pager is the
multi -address pager which can receive up to four
different tone types (i.e.,one beep, repeated;
two beeps, repeated; three beeps, repeated; four
beeps, repeated) and store them in a "memory
chip". One beep could be designated to "call
2
the main office"; two beeps could be designated
to "go to the showroom"; three beeps could be
designated to "call the answering service"; and
four beeps could be designated to "call your
home". In this manner, each type of beep is
used as a "code" to tell the wearer what to do.
The tone -only pager is relatively inexpensive
but may not be heard (or heard, BUT the number
of beeps may be unintelligible) in a'noisy
environment. The limitation of four "codes" may
be a handicap and in some cases may still
require the wearer to go to a phone to find out
what is wanted.
b. VOICE PAGERS:
This type of pager is particularly effective
because it is like a one-way radio; the person
sending the message simply speaks the message
and is able to tell the wearer exactly what to
do: i.e., "Go to the service area and see
Frank", or "Your customer is waiting in the
showroom", or "call your wife at her office".
Most of the time a voice pager is very effective
because the wearer does not have to go to a
phone and call to find out what is wanted and
there is no limit on the number and variety of
messages that can be sent. The only drawback
would be the occasional instance when the wearer
is in a very noisy environment, such as in the
tire or brake area of the service department
where the sound of air -impact wrenches would
"drown out" the voice message, in which case he
would then have to call the office.
The voice pager is most like the Loudspeaker
P.A. system it would replace except the sound is
confined to the wearer of the pager rather than
being broadcast throughout the dealership AND
the neighborhood.
c. DIGITAL DISPLAY PAGERS:
This type of pager is the newest on the market
and is gaining rapidly in popularity especially
among executives who could not have a voice
pager blaring some message in the middle of a
business meeting.
3
It uses a small liquid -crystal display window
like pocket calculators to display any series of
numbers (usually up to 12 or 14). The wearer
usually receives his "message" in the form of a
beep tone to call his attention to a displayed
telephone number to call at his convenience.
The seeming disadvantage of having to go to a
telephone to determine the nature of'the message
can be overcome through the use of numerical
"codes" comprised of any combination of numbers
that might designate some particular
instruction.
The display pager can be set to a "silent"
position where only the display comes up and the
wearer can look at the message without anyone
being aware that he received a page. If he
forgets to check periodically, however, he will
not be aware of the page until it is too late,
although it will be held in memory indefinitely.
There are even "vibrator" pagers that vibrate to
let the wearer know that he is being paged.
A variation on the display pager (which is
numeric only) is the alpha -numeric display pager
upon which a message can be spelled out in
actual words and numbers. These are quite
expensive to lease and very expensive on monthly
service charges.
There are two possible ways to acquire paging service:
1. LEASE and SERVICE COMBINATION:
This is the most common way to have paging service to a
number of employees. A monthly charge of around $25.00
(plus or minus about $8.00 according to quantity and type)
is paid to cover the rental of one pager plus the paging
service.
Like any rental the portion that covers the equipment
rental is on-going. The advantage is that there is no
inventory of equipment and no service contract to arrange
and the service and equipment use can be terminated at any
time with no further obligation.
4
2. EQUIPMENT PURCHASE and PAGING SERVICE ONLY CONTRACT:
This method is the most cost effective if the service is
intended to extend two or more years. The pagers can be
capitalized at about $200.00 to $300.00 each either from a
pager manufacturer or dealer or the paging service itself
and then the paging service can be contracted for
separately from the paging service for $6.00 to $12.00 per
month per pager (depending upon type of service and
quantity of pagers served.
As a comparison between pager ownership with leased
service and leased pagers and service, note the following
example:
40 pagers total cost, $19,080.00
over 2 -year period.
$24,000.00
Clearly, the advantage is in favor of owned pagers after 20
months; thereafter, the only cost is the paging service; the
cost of the pagers will have already been amortized and
depreciation could have been taken in addition!
In summary, my recommendation is owned voice or display pagers
with leasing of the service only, provided that kind of cash can
be advanced. As a reference, there is a very recent precedent
for this solution that just took place in Costa Mesa. Nabors
Cadillac had to deal with residential complaints and bought 40
pagers and leased the service from MobileCom. They are
extremely satisfied, I understand. The figures above do not
5
OWNED PAGERS,
LEASED PAGERS,
LEASED SERVICE
LEASED SERVICE
------------------------------------------------------------------
2 -year period
2 -year period
40
pagers
purchased
@ $200
each.
$8,000.00
$0.00
------------------------------------------------------------------
40
pagers
sales tax
@ 6%
$480.00
$0.00
------------------------------------------------------------------
40
pagers
extended 3 -yr.
------------------------------------------------------------------
warranty @ $25 each.
$1,000.00
$0.00
40
pagers,
service only,
2 -yrs.
@ $10 ea. per
mo. $9,600.00
$0.00
------------------------------------------------------------------
40
pagers,
lease & service,
2 -yrs.
@ $25 ea. per
mo. $0.00
$24,000.00
40 pagers total cost, $19,080.00
over 2 -year period.
$24,000.00
Clearly, the advantage is in favor of owned pagers after 20
months; thereafter, the only cost is the paging service; the
cost of the pagers will have already been amortized and
depreciation could have been taken in addition!
In summary, my recommendation is owned voice or display pagers
with leasing of the service only, provided that kind of cash can
be advanced. As a reference, there is a very recent precedent
for this solution that just took place in Costa Mesa. Nabors
Cadillac had to deal with residential complaints and bought 40
pagers and leased the service from MobileCom. They are
extremely satisfied, I understand. The figures above do not
5
necessarily reflect any costs incurred by Nabors Cadillac and
are used as an example only.
There are two paging companies in the Los Angeles basin or
Orange County area that are outstanding in this field. Of the
two, MobileCom (which used to be Orange County Radio Telephone)
has the lowest costs for service.
MOBILECOM
401 S. SANTA FE ST.
SANTA ANA, CA 92705
(714) 835-3305
REP: JOY WATERWORTH
6
METROMEDIA
1125 N. MAGNOLIA AVENUE
ANAHEIM, CA 92803
(714) 220-2337
REP: TREVOR COLON
SUMMARY OF INTERVIEWS REGARDING
PAGING SYSTEMS
In light of the JDR Consultants' report that Nabors Cadillac of Costa
Mesa uses hand-held pagers to reduce noise impacts upon the surrounding
neighborhood, several visits were made to this dealership. Mr. Larry
Mann, General Manager of Nabors Cadillac, has repeatedly made himself
available to discuss the sound systems being used and to answer questions.
Nabors Cadillac shares a common rear property line with a two-story
apartment complex known as the Merrimac Woods. Additionally, the auto
agency shares a side property line with several single-family detached
residences. The apartments are set back from the common property line
approximately 40'; the housing setback is somewhat less.
Nabors Cadillac was built after the residential units were occupied, and
the dealership agreed to use a system of hand-held pagers to help alleviate
the residents' concern about loudspeaker impacts. Approximately 40 pagers
were purchased for use by managers, salesmen and service advisers and
transmitter time is leased from a paging service.
Nabors Cadillac does not exclusively use a hand -paging system. Larry
Mann has found this both impractical and detrimental to his business
operation. Instead, he attempts to use the hand pagers during mid-day
business hours whenever practical (although he intermittently uses loud-
speakers) . He finds it essential to use loudspeakers during the peak
business hours of 7:30AM to 9:30AM and 4:OOPM to 6:30PM when cars are
being brought in for or picked up from servicing.
Mr. Mann has encountered both minor and major problems with hand-held
pagers. The smaller problems include:
- Batteries may be dead, so party being paged is unaware of the fact.
- User may turn off the pager and forget to turn it back on.
- Employee may forget pager at home.
- Employee may not wear pager due to fear of breaking the equip-
ment while he works.
- Pagers may not be audible if body work is underway in the near
vicinity.
The far greater problem which arises with hand paging systems is the time
lag required to send a message. Messages are sent by telephoning the
paging company, which in turn sounds out the page. This two-step process
inherently creates some lag time before the message is received by the proper
party. If the purpose of the page was to respond to a customer's tele-
phone inquiry, the page may also require that two telephone lines are tied
up while the customer holds and the page is put through.
Serious lag time problems occur during peak business hours. At such
times Mr. Mann has encountered delays of 10-15 minutes in putting through
a page, since numerous messages may be stacked up awaiting transmission
through the paging company. This stackup could easily lose business for
the dealership. Quite clearly, if a customer calls to inquire whether a car
is ready to be picked up and is placed on hold fifteen minutes while awaiting
an answer, that customer will likely take his/her business elsewhere.
In summary of his experiences Mr. Mann stated emphatically that he did not
believe any auto dealership could operate to its full business potential if
required to exclusively use a hand paging system. He believes such a
requirement would create a business disadvantage to dealers at the Tustin
Auto Center. His statement is made more effective by recognizing that
Nabors Cadillac might benefit if such a restriction were placed on its com-
petitor, McLean Cadillac.
Nearby residents apparently do not have significant problems with Nabors
Cadillac's use of loudspeakers. Mrs. Lola Whitney, Manager of the adjacent
Merrimac Woods apartment complex, indicated that she has received no
complaints regarding auto dealership noise from tenants in her complex,
and has not had difficulty in keeping rented those apartments which are
nearest Nabor's Cadillac.
Chick Iverson Porsche/Audi of Newport Beach is another automobile agency
which has had to deal with the issue of noise impacts on its residential
neighbors. This agency is located across from the entrance to Linda Isle,
which is comprised of exclusive waterfront homes. Additionally, it shares
a common property line with the Promontory Point Apartments, a high-end
complex which has a rent structure from $945 /mo. (1 bedroom with 800 s. f. )
to $2,550/mo. (2 bedroom with view and 1,450 s. f.) and which overlooks
Newport Harbor. The Promontory Point Apartments are elevated on a hill-
side above the dealership. This hillside is a natural amphitheater for
transmission of noise from the auto agency. There are several hundred
feet at most between the dealership and the nearest apartment units.
Chick Iverson has also found loudspeakers to be necessary for his business
purposes. He has constructed screen walls around the perimeter of his
property, and has placed speakers on the inside face of the walls. The
speakers are several feet below the top of the wall and are directed into
the center of his property. There are several speakers so placed along
the Promontory Point property line.
Meg Moreo, the Area Manager for the Promontory Point Apartments, was
contacted to learn if apartment residents had complained of noise from the
Porsche dealership. Meg was unaware of any complaints, but said she would
contact several residents who occupied apartment units nearest to that
business. Several days later a letter was received from one of the residents.
That letter is copied in full on the following page.
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TUSTIN AUTO CENTER
PROPOSED LOUDSPEAKER CRITERIA
The following material is the Loudspeaker Criteria that was proposed
to the City of Tustin Community Development Department. Staff of this
department recommended approval of the criteria subject to a maximum
allowable sound level at any loudspeaker of 75 dbA and certain other
controls. This creates a 5 dbA reduction in impacts to all locations
analyzed. The following criteria has not been modified to reflect this
reduction in order that it remain consistent with the data presented in
the Marshall Long Associates' study, which was the foundation of the
criteria's development.
TUSTIN AUTO CENTER
LOUDSPEAKER CRITERIA
In light of the City's and the Developer's mutual concern to protect nearby
residents and future land users from undue noise intrusion by the Tustin
Auto Center, the following Criteria has been developed for the use of any
amplification system(s) within the project. The Criteria is based on an
acoustical analysis prepared by Marshall Long & Associates for the McLean
Cadillac paging system, which will be the dealership located nearest to any
existing or future residences. A copy of this report is attached for reference,
and is summarized as follows:
1. Per Tustin Noise Ordinance adopted July 21, 1980, noise impacts
to any residential area shall not exceed 55 dB(A) from the hours
of 7:00 a.m. - 10:00 p.m. Any speech or simple tone noise shall
require a further noise level reduction of 5 dB(A) . Conversely,
the allowable noise level shall be increased by 10 dB(A) for any
sound impacts which occur 5 minutes or less per hour, as is typical
for auto dealers' paging systems. Cumulatively, these standards
allow a maximum noise impact from a typically operated amplification
system of 60 dB (A) .
2. The analysis is based on the following conditions and is thereby
considered "worst-case":
a. No allowance has been made for future background traffic
noise along Jamboree Road, which will eventually reduce
impacts of noise generated within the Auto Center.
b. No allowance has been made for any sound attenuation measures
which will be taken by the future residential project to be built
between Browning and Jamboree Roads. Due to major noise
impacts to that project from traffic on the freeway, on Jamboree
Road, and on Laguna Road, the residential development will be
enclosed by a sound wall and will include other noise attenuation
measures which cumulatively serve to reduce noise levels by at
least 7 dB(A) to the nearest backyard along Jamboree Road and
at least 25 dB(A) inside the nearest unit. These noise reductions
are not taken into account in the noise limits established by this
Criteria.
c. The noise analysis assumes that loudspeakers on the project's
perimeter are located 2' below the perimeter wall, are directed
away from the perimeter wall, and are set at 80 dB(A).
3. Computer analysis establishes that in light of the above conditions,
worst-case impact of loudspeakers placed along the Jamboree Road
dealer's property line will be as follows:
a. 35 dB(A) to the nearest Browning Avenue resident prior to
the construction of any housing units within the future resi-
dential project which separates Browning Avenue from the Auto
Center. According to the "Typical Noise Levels (A -Weighted
Scale)" exhibit which was prepared under the project's EIR in
1984, 35 dB(A) is equivalent to the sounds to be heard inside
a library or during a quiet rural night. Noise measurements
which were taken on September 17, 1984 by John Hillard 8
Associates of Tustin indicated that at three points measured
along Browning Avenue between Bryan Avenue and Laguna
Road, the present daytime sound levels range from the low -
high 60 dB(A) levels. Consequently, 35 dB(A) impacts from
the Auto Center will be perceived as insignificant.
b. 60 dB(A) maximum impact to the nearest residential property
line along Jamboree Road prior to the construction of the
residential sound wall or other attenuation measures. By law
the noise impacts to this property cannot exceed 65 CNEL,
which is a 24-hour averaged noise measurement. The Auto
Center's maximum impact of 60 dB(A) occurring for five minutes
per hour between 7:00 a.m. and 10:00 p.m. is the equivalent
of a CNEL level of 48.6 dB, and is consequently well below
allowable limits and below the traffic impacts created along
Jamboree Road or the freeway.
Table #10 of the Marshall Long analysis represents specific
test data under which a paging system set at 80 dB(A) was
measured at the nearest residential property line at levels
which ranged between 49.3 and 54.6 d6. This further confirms
that the 60 dB(A) impact would be both a maximum and a worst-
case condition.
SOUND SYSTEM STANDARDS
In light of the above data, any sound system installation within the Tustin
Auto Center shall conform to the following standards:
1. Whenever possible, dealers are encouraged to use hand-held paging
devices rather than loudspeaker systems for maximum sound attenuation.
2. In the event that loudspeakers must be used, a dealer's lot shall
be covered by multiple zones so that enunciation through a loud-
speaker occurs on a controlled area of the parcel rather than across
the entire lot.
3. Loudspeakers may not be used prior to 8:00 a.m. or after 7:00 p.m.
If, at any time, a dealer shall deem it critical to his/her business
operation to use any loudspeakers at an earlier or later hour, specific
Planning Commission approval must first be obtained.
4. Loudspeakers along the perimeter of the project or that are not
directly shielded by a building shall be placed at least 2' below
the top of the perimeter wall which surrounds that dealer's property.
5. All loudspeakers shall be directed toward the interior of the project
and away from the perimeter property line(s).
6. Whenever possible, loudspeakers shall be placed within service
buildings rather than on the outside of the structure.
7. Whenever possible, .loudspeakers shall be placed in such a manner
to prevent "bouncing" of sound off of a nearby building.
8. Prior to installation of a loudspeaker system, each dealer shall obtain
any necessary building permit(s) from the City of Tustin. Upon
installation of the system and as a condition of final approval of work
authorized by these permit(s), sound readings shall be taken of that
dealership's loudspeaker impacts on adjacent land uses, and the speaker
volumes shall be adjusted so that they do not exceed the impacts
stipulated below. Further, the speaker installer or sound engineer
shall advise the City in writing that the loudspeaker volume adjustment
has been mechanically or electrically locked off to preclude arbitrarily
increasing the volumes at a later date.
Maximum sound levels at adjacent property lines shall be:
a. 35 dB(A) to any residence along Browning Avenue.
b. 55 dB(A) to the outside of the soundwall along the
property line of any residence abutting Jamboree Rd.
c. 65 dB(A) to any adjacent commercial uses which occur
outside of the Auto Center.
COMMON INDOOR
NOISE LEVELS
120 ROCK BAND
110
100
90 FOOD BLENDER AT 3 FEET
COMMON OUTDOOR
NOISE LEVELS
CHAIN SAW AT 2 FEET
GAS LAWN MOWER AT 3 FEET
2 -ENGINE PROP TAKEOFF (10001
80 GARBAGE DISPOSAL AT 3 FEET DIESEL TRUCK AT 50 FEET
1 -ENGINE PROP TAKEOFF (10001
70 VACUUM CLEANER AT 10 FEET AUTOMOBILE AT 50 FEET
60 CONVERSATION AT 3 FEET
LARGE BUSINESS OFFICE
50 QUIET OFFICE
40
LIBRARY
30
20
10
HEAVY TRAFFIC AT 300 FEET
QUIET URBAN DAYTIME
QUIET RURAL NIGHTTIME
0 THRESHOLD OF HEARING
TYPICAL NOISE LEVELS
(A -WEIGHTED SCALE)
CITY OF TUSTIN
Marshall Long 1629 Stanford Street
Santa Monica, CA 90404
Acoustics I Telephone (213) 829-4311
J/N 850309
NOISE ANALYSIS OF THE
McLEAN CADILLAC PAGING SYSTEM
for
The Irvine Company
550 Newport Center Drive
Newport Beach, California 92658
May 23, 1985
1.0 Introduction
At the request of the Irvine Company Marshall Long/Acoustics has
undertaken a noise study of a proposed paging sound system to be
installed at the McLean Cadillac dealership which will be located
as shown in the enclosed drawing, at the junction of Jamboree and
Auto Center Drive in Tustin, California. In this study
calculations were made of the sound levels using a computer model
developed by Marshall Long/Acoustics which allows the calculation
of sound from a number of speakers with various locations and
orientations at a large number of receiver locations specified by
the user.
To carry out the calculations speakers were mathematically
located about the site in order to provide adequate coverage in
the areas where paging is required. Receiver locations were
chosen throughout the site in order to determine whether or not
sufficient coverage would be attained. Additional receiver
locations were also specified at the nearest residential areas
which are directly across the street along Jamboree and also at
neighbor locations well away from the site some 1,800 feet
northwest along Browning. At this time the Browning locations
are the nearest existing residences however condominiums will be
built directly across from the dealership and thus this area is
of primary concern.
The fundamental criteria used to determine acoustical impact was
the Tustin noise ordinance, Chapter 6 of Article 4 of the city
code adopted July 21, 1980. It is included in it's entirety in
the appendix of this report. A portion of the exterior noise
standards are quoted below:
4614 EXTERIOR NOISE STANDARDS
(a) The following noise
specif ical ly indicated,
within a designated noise
standards, unless otherwise
shall apply to all property
zone:
Marshall Long
Acoustics
Noise Zone Noise Level
1 55 dB (A)
50 dB (A)
2 60 dB(A)
3 70 dB(A)
4 55 dB (A)
Time Period
7:00 a.m.--10:00 p.m.
10:00 p.m.-- 7:00 a.m.
any time
any time
any time
In the event the alleged offensive noise consists of impact
noise, simple tone noise, speech, music, or any combination
thereof, each of the above noise levels shall be reduced by
five (5) dB(A).
(b) It shall be unlawful for any person at any location
within the incorporated area of the City to create
any noise, or to allow the creation of any noise on property
owned, leased, occupied, or otherwise controlled by such
person, when the foregoing causes the noise level, when
measured on any other property to exceed:
(1) The noise standard for a cumulative period of more
than thirty (30) minutes in any hour; or
(2) The noise standard plus five (5) dB(A) for a
cumulative period of more than fifteen (15) minutes in
any hour; or
(3) The noise standards plus ten (10) dB(A) for a
cumulative period of more than five (5) minutes in any
hour; or
(4) The noise standards plus fifteen (15) dB(A) for a
cumulative period of more than one (1) minute in any
hour; or
(5) The noise standard plus twenty (20) dB(A) for any
period of time.
(c) In the event the ambient noise level exceeds any of
the first four (4) noise limit categories above, the
cumulative period applicable to said category shall be
increased to reflect said ambient noise level. In the event
the ambient noise level exceeds the fifth noise limit
category, the maximum allowable noise level under said
Marshall Long
Acoustics
category shall be increased to reflect the maximum ambient
noise level. (Ord. No. 828, Sec, 1, 7-21-80: Ord. No. 845,
Secs. 4, 5, 5-18-81)
For purposes of the analysis it was assumed that the nearest
neighbors will be a noise zone 1 or all residential properties.
Likewise it is assumed that the paging system will only be
operated between 7 A.M. and 10 P.M. The broadcast material will
consist of speech and thus will be subjected to a 5 dB reduction
in allowable level. It is further assumed that the system will
be used no more than a cumulative period of 5 minutes in any
hour. Thus the overall noise level which is allowed under the
Tustin standard is the base standard, 55 dBA, minus 5 dB for
speech and 10 dB added for the a cumulative period of no more
than 5 minutes per hour or 60 dBA. This limiting level or does
not take into account any contribution due to background levels
from future traffic along Jamboree. It is therefore considered a
worst case standard for determining impact.
2.0 Calculations
Calculations were carried out using the computer model. The model
allows the location and orientation of a large number of speakers
by defining their X, Y, Z coordinates and their X, Y, Z aim
points and rotations. The computer model calculates sound
pressure levels at user designated receiver locations. For
purposes of this analysis 16 speaker locations were calculated
using some 60 receiver locations. Most receiver locations were
selected throughout the site in order to confirm that paging
levels were satisfactory for the interior of the project. In
addition 9 receiver locations were selected at the edge of the
property line along Jamboree and one additional receiver was
selected on Browning.
In addition to the calculations of the attenuation due to
directivity and distance for each speaker, separate calculations
were carried out on the attenuation due to barrier shielding from
the proposed walls and buildings within the project. These
calculations were performed for each speaker and receiver
location. In each case the worst case receiver location was
used. Receivers were generally located on the second floor at a
height of fifteen feet. No attenuation due to future barriers
adjacent to the condominium project was assumed.
All calculations were carried out using the 1,000 hertz
directivity of the speakers. In order to be conservative the
barrier calculations were done using a 500 Hz wavelength. Both
these assumptions are conservative since the spectral response of
Marshall Long
A(- ,rustics
the speakers peaks at 2 KHz. The selected speaker was an
Electrovoice PA 60 which has a frequency range of 500 Hz to 4
KHz. This speaker was selected because of its well controlled
directivity. The locations and orientations of the speakers are
shown in the enclosed sketch.
The speakers on the McLean Cadillac property nearest Jamboree
were assumed to be located 2 feet below the top of an 8 foot high
block wall and the service bay speakers were located at a height
of 12 feet within the service bays pointed out through the
openings in the building. The top of the block wall and the ends
of the building serve as an effective barrier for the speakers.
When speakers are not shielded by one of these two barriers they
are shielded by the top portion of the side wall of the service
bay building. Additional speakers are also shown throughout the
lot mounted on the sides of buildings. All are well shielded by
the buildings or located sufficiently far away from Jamboree that
they are not a primary concern.
3.0 Results and Recommendations
The results of these calculations are shown in Tables 1 - 9 and
summarized in Table 10 for locations along Jamboree. The overall
conclusion is that for the worst case nearest neighbors in the
sound system can be adjusted to 80 dBA throughout the McLean
Cadillac Dealership and will result in levels no greater than 60
dBA across the street. At locations along Browning the
calculated level of sound is about 35 dB and will be further
reduced when the condominiums are built on the property.
Although the calculations predict compliance with the Tustin
noise ordinance, it is recommended that after installation of the
speakers they be tested in order to assure compliance. In order
to do this sound levels should be measured at the closest future
condominium units using a known level of noise. The level should
be increased until a specified level is produced at the nearest
neighbors. At this point it should be confirmed that there is
sufficient volume for the paging needs of the Cadillac
dealership. If both criteria are met then the volume adjustment
would be fixed either mechanically or electrically so that the
system could not be changed upward. In this way all parties have
a guarantee that their needs will be fulfilled.
If the noise level exceeds the criteria threshold at the nearest
neighbor then some reorientation of the speakers can be attempted
in order to improve paging levels to the dealership. If
unsuccessful then the only alternative would be to limit the
volume within the dealership to maximum level allowed by the
criteria. This procedure would insure that if levels are louder
Marshall Long
Acoustics
due to factors not considered in the calculation such as multiple
reflections from buildings that these would be corrected through
the field installation procedure outlined above.
It should be realized that the 60 dBA limit five (5) minutes per
hour is not a particularly high noise level, especially during
day time hours. For planing purposes a CNEL level of 65 is the
limiting outdoor level due to roadway sources such as traffic
along Jamboree. If a level of 60 dB occurred steadily for 5
minutes per.hour between the hours of 7 a.m. and 10 p.m. this
would be equivalent to a CNEL level of 48.6 dB, well below the
CNLE 65 which would be produced by traffic along Jamboree.
Marshall Long
Acoustics
Sound Pressure Levels at the Nearest Residental Neighbors (dBA)
Location 1: Along Jamboree 50 ft. northeast of Laguna
Unshielded Shielded
Speaker Level Shielding Level
1
53.3
13.5
39.8
2
52.5
13.5
39.0
3
51.8
13.5
38.3
4
51.0
13.5
37.5
5
50.2
13.5
36.7
6
49.2
13.5
35.7
7
58.4
5.3
53.1
8
56.2
5.3
50.9
9
54.2
5.3
48.9
10
52.5
10.0
42.5
11
51.3
20.0
31.3
12
48.2
5.3
42.9
13
47.5
5.3
42.2
14
46.8
5.3
41.5
15
46.1
10.0
36.1
16
45.5
20.0
35.5
Total 57.2 dBA
Average Courtyard Level = 83.3 dBA
Difference = 26.1 dBA
Marshall Long
Acoustics
Sound Pressure Levels at the Nearest Residental Neighbors (dBA)
Location 2: Along Jamboree 50 ft. northwest of Laguna
Unshielded Shielded
Speaker Level Shielding Level
1
57.6
13.5
44.1
2
59.6
13.5
46.1
3
57.2
13.5
43.7
4
55.0
13.5
41.5
5
53.1
13.5
39.6
6
52.4
13.5
38.9
7
55.2
14.7
40.5
8
53.3
5.0
40.3
9
51.8
5.0
46.3
10
50.5
5.0
45.3
11
49.3
5.0
44.3
12
51.8
14.7
37.1
13
50.8
5.0
45.8
14
49.9
5.0
44.9
15
48.9
5.0
43.9
16
48.1
5.0
43.1
Total 56.3 dBA
Average Courtyard Level = 83.3 dBA
Difference = 27.0 dBA
Marshall Long
Acoustics
Sound Pressure Levels at the Nearest Residental Neighbors (dBA)
Location 3: Along Jamboree 100 ft. northwest of Laguna
Unshielded Shielded
,Speaker Level Shielding Level
1
55.4
13.5
41.9
2
59.5
13.5
46.0
3
59.4
13.5
45.9
4
56.9
13.5
43.4
5
54.8
13.5
41.3
6
53.5
13.5
40.0
7
54.1
17.5
36.6
8
52.5
12.8
39.7
9
51.1
8.3
42.8
10
49.9
5.3
44.6
11
48.8
5.0
43.8
12
53.1
17.5
35.6
13
51.7
12.8
38.9
14
50.5
8.3
42.2
15
49.5
5.3
44.2
16
48.5
5.0
43.5
Total 54.8 dBA
Average Courtyard Level = 83.3 dBA
Difference = 28.5 dBA
Marshall Long
Acoustics
Sound Pressure Levels at the Nearest Residental Neighbors (dBA)
Location 4: Along Jamboree 150 ft. northwest of Laguna
Unshielded Shielded
Sneaker Level ,Shielding Level
1
53.9
13.5
40.4
2
57.4
13.5
43.9
3
59.5
13.5
46.0
4
59.2
13.5
45.7
5
56.7
13.5
43.2
6
54.3
13.5
40.8
7
54.2
20.0
34.2
8
52.5
20.0
32.5
9
51.1
18.9
32.2
10
49.9
17.9
32.0
11
48.9
17.2
31.7
12
53.8
20.0
33.8
13
52.2
20.0
32.2
14
50.8
18.9
31.9
15
49.7
17.9
31.8
16
48.6
17.2
31.4
Total 52.1 dBA
Average Courtyard Level = 83.3 dBA
Difference = 31.2 dBA
Marshall Long
Acoustics
Sound Pressure Levels at the Nearest Residental Neighbors (dBA)
Location 5: Along Jamboree 200 ft. northwest of Laguna
Unshielded Shielded
Speaker Level Shielding Level
1
52.7
13.5
39.2
2
55.4
13.5
41.9
3
57.6
13.5
44.1
4
59.5
13.5
46.0
5
59.0
13.5
45.5
6
55.5
13.5
42.0
7
54.0
20.0
34.0
8
52.4
17.9
34.5
9
51.1
15.0
36.1
10
49.9
12.9
37.0
11
48.8
11.2
37.6
12
54.0
20.0
34.0
13
52.4
17.9
34.5
14
51.0
15.0
36.0
15
49.8
12.9
36.9
16
48.7
11.2
37.5
Average Courtyard Level = 83.3 dBA
Difference = 30.7 dBA
52.6 dBA
Marshall Long
Acoustics
Sound Pressure Levels at the Nearest Residental Neighbors (dBA)
Location 6: Along Jamboree 250 ft. northwest of Laguna
Unshielded Shielded
Speaker Level Shielding Level
1
52.0
13.5
38.5
2
53.6
13.5
40.1
3
55.5
13.5
42.0
4
57.9
13.5
44.4
5
59.4
13.5
45.9
6
55.4
13.5
41.9
7
53.3
19.8
33.5
8
52.0
10.1
41.9
9
50.8
5.0
45.8
10
49.7
5.0
44.7
11
48.7
5.0
43.7
12
54.9
19.8
35.1
13
53.0
10.1
42.9
14
51.5
5.0
46.5
15
50.2
5.0
45.2
16
49.1
5.0
44.1
Average Courtyard Level = 83.3 dBA
Difference = 27.9 dBA
55.4 dBA
Marshall Long
Acoustics
Sound Pressure Levels at the Nearest Residental Neighbors (dBA)
Location 7: Along Jamboree 50 ft. northwest of Laguna
Unshielded Shielded
Speaker Level Shielding Level
1
51.5
13.5
38.0
2
52.5
13.5
39.0
3
53.8
13.5
40.3
4
55.7
13.5
42.2
5
58.1
13.5
44.6
6
56.8
13.5
43.3
7
52.2
16.4
35.8
8
51.2
6.1
45.1
9
50.3
5.2
45.1
10
49.3
5.2
44.1
11
48.4
5.2
43.2
12
55.8
16.4
39.4
13
53.9
6.1
47.9
14
52.3
5.2
47.1
15
51.0
5.2
45.8
16
49.8
5.2
44.6
Average Courtyard Level = 83.3 dBA
Difference = 27.3 dBA
56.0 dBA
Marshall Long
Acoustics
Sound Pressure Levels at the Nearest Residental Neighbors (dBA)
Location 8: Along Jamboree 350 ft. northwest of Laguna
Unshielded Shielded
Sipeaker Level Shielding Level
1
50.8
13.5
37.3
2
51.8
13.5
38.3
3
52.6
13.5
39.1
4
53.9
13.5
40.4
5
55.9
13.5
42.4
6
58.0
13.5
44.5
7
51.1
9.0
42.1
8
50.3
5.2
45.1
9
49.5
5.2
44.3
10
48.7
5.2
43.5
11
48.0
5.2
42.8
12
56.8
9.0
47.8
13
54.5
5.2
49.3
14
52.9
5.2
47.7
15
51.6
5.2
46.4
16
50.4
5.2
45.2
Average Courtyard Level = 83.3 dBA
Difference = 26.5 dBA
56 .8 dBA
Marshall Long
Acoustics
Sound Pressure Levels at the Nearest Residental Neighbors (dBA)
Location 9: Along Jamboree 400 ft. northwest of Laguna
Unshielded Shielded
Speaker Level Shielding Level
1
50.2
13.5
36.7
2
51.1
13.5
37.6
3
51.9
13.5
38.4
4
52.6
13.5
39.1
5
54.1
13.5
40.6
6
58.1
13.5
44.6
7
50.3
5.3
45.0
8
49.4
5.3
44.1
9
48.7
5.3
43.4
10
48.0
5.3
42.7
11
47.4
10.0
37.4
12
58.4
5.3
53.1
13
55.8
5.3
50.5
14
53.5
5.3
48.2
15
52.0
5.3
46.7
16
50.8
10.0
40.8
Average Courtyard Level = 83.3 dBA
Difference = 25.4 dBA
57 .9 dBA
Marshall Long
Acoustics
Overall Predicted Noise levels at Residential Locations
Adjacent to the McLean Cadillac Dealership
Receiver Sound Level (dBA) at Receiver
Number Location for 80 dBA in Parking Lot
53.9
53.0
51.5
48.8
49.3
52.1
52.7
53.5
54.6
34.6
Marshall Long
Acoustics
Adjacent to
Jamboree
1
50'
northeast
of
Laguna
2
50'
northwest
of
Laguna
3
100'
northwest
of
Laguna
4
150'
northwest
of
Laguna
5
200'
northwest
of
Laguna
6
250'
northwest
of
Laguna
7
300'
northwest
of
Laguna
8
350'
northwest
of
Laguna
9
400'
northwest
of
Laguna
10
On Browning near
San Juan
53.9
53.0
51.5
48.8
49.3
52.1
52.7
53.5
54.6
34.6
Marshall Long
Acoustics
APPENDIX
Marshall Long
Acoustics
REV: 1-82
C RA PTER 6
NOISE CONTROL
CHAPTER INDEX
4611 DECLARATION OF POLICY
4612 DEF IN IT IONS
4613 DESIGNATED NOISE ZONES
4614 EXTERIOR NOISE STANDARDS
4615 INTERIOR NOISE STANDARDS
4616 SPECIFIC DISTURBING NOISES PROHIBITED
4617 EXEMPTIONS
4618 SCHOOLS, HOSPITALS, COURTS AND CHURCHES
4619 AIR CONDITIONING AND REFRIGERATION
4620 NOISE LEVEL MEASUREMENT CRITERIA
4621 MANNER OF ENFORCEMENT; ADOPTION OF TITLE 4, DIVISION 6,
CODIFIED ORDINANCES OF ORANGE COUNTY
4622 VARIANCE PROCEDURE
4623 NOISE VARIANCE BOARD
4624 APPEALS
4625 VIOLATIONS; MISDEMEANORS
HS -6-1
TUSTIN CITY CODE NOISE CONTROL 4611
CRA PTER 6
NOISE CONTROL
EDITOR'S NOTE: Ord. No. 828, Sec. 1, adopted July 21,
1980, amended Ch. 6 of Art. 4 to read as herein set
out. Prior to amendment, Ch. 6 pertained to similar
subject matter, consisted of Section 4611, and was de-
rived from Ord. No. 9; Ord. No. 239; Ord. No. 450,
Secs. 1--3; and Ord. No. 469.
4611 DECLARATION OF POLICY
In order to control unnecessary, excessive and annoying sounds emanating from
incorporated areas of the city, it is hereby declared to be the policy of the
City to prohibit such sounds generated from all sources as specified in this
Chapter.
It is determined that certain noise levels are detrimental to the public health,
welfare and safety and contrary to public interest, therefore, the City Council
does ordain and declare that creating, maintaining, causing or allowing to cre-
ate, maintain or cause any noise in a manner prohibited by or not in conformity
with the provisions of this Chapter, is a public nuisance and shall be punish-
able as such. (Ord. No. 828, Sec. 1, 7-21-80)
4612 DEFINITIONS
The following words, phrases and terms as used in this Chapter shall have the
meaning as indicated below:
(1) "Ambient Noise Level." The all-encompassing noise level associated
with a given environment, being a composite of sounds from all
sources, excluding the alleged offensive noise, at the location and
approximate time at which a comparison with the alleged offensive
noise is to be made.
(2) "A -Weighted Sound Level" (dB(A)). A quantity in decibels, read from a
standard sound -level meter that is switched to the weighting network
labeled "A." The A -weighted network discriminates against the lower
frequencies according to a relationship approximating the auditory
sensitivity of the human ear at moderate sound levels.
(3) "Commercial Property." A parcel. of real property which is developed
and zoned either in part or in whole for commercial purposes, includ-
ing, but not limited to retail and wholesale businesses, and profes-
sional offices, but excluding home occupation uses as authorized by
Ordinance No. 330.
(4) "CNEL" (Community Noise Equivalent Level). A cumulative measure of
community noise exposure for a twenty -four-hour day, using the A -
weighting sound level and expressed in logarithmic units. This CNEL
scale takes into account the single event sound level, single event
duration, single event occurrence frequency, and the time of the oc-
currence of the noise source. Additionally, it applies weighting
REV: 1-82
HS -6-3
TUSTIN CITY CODE _ NOISE CONTROL 4612(4
Eactors which place greater significance on noise events occurring in
the nighttime (10:00 p.m. to 7:00 a.m.) than on those during the
evening (7:00 p.m. to 10:00 p.m.) or daytime (7:00 a.m. to 7:00 p.m.),
respectively.
(5) "Cumulative Period." An additive period of time composed of
individual time segments which may be continuous or interrupted.
(6) "Decibel" (dB). 4 unit which denotes the ratio between two (2)
quantities which are proportional to power: the number of decibels
corresponding to the ratio of two ( 2 ) amounts of power is ten ( 10)
times the logarithm to the base ten (10) of this ratio.
(7) "Dwelling Unit." A single unit providing complete, independent living
facilities for one (1) or more persons including permanent provisions
for living, sleeping, eating, cooking and sanitation.
(8) "Emergency Machinery," "Vehicle," or "Work." Any machinery, vehicle
or work used, employed or performed in an effort to protect, provide
or restore safe conditions in the community or for the citizenry, or
work by private or public utilities when restoring utility service.
(9) "Fixed Noise Source." A stationary device which creates sounds while
fixed or motionless including, but not limited to, industrial and com-
mercial machinery and equipment, pumps, fans, compressors, generators,
air conditioners and refrigeration equipment.
(10) "Grading." any excavating or filling of earth material, or any com-
bination thereof, conducted at a site to prepare said site for con-
struction or other improvements thereon.
(11) "Impact Noise." The noise produced by the collision of one (1) mass in
motion with a second mass which may be either in motion or at rest.
('11) "Industrial Property." A parcel of real property which is developed
and zoned either in part or in whole for manufacturing purposes,
including research and development uses, but excluding home occupation
cases as authorized by Ordinance No. 330.
(13) "Mobile Noise Source." Any noise source other than a fixed noise
source.
(14) "Noise Level." The "A" weighted sound pressure level in decibels ob-
tained by using a sound level meter at slow response with a refer-
ence pressure of twenty (20) micropascals per square meter. The unit
of measurement shall be designated as dB(A).
(15) "Noise Variance Board." An administrative board of five (5) members
appointed by the Board of Supervisors of the County of Orange, per Ti-
tle 4, Division 6, Article I of the Codified Ordinances of the Coun-
ty of Orange.
(16) "Person." A person, firm, association, copartnership, joint venture,
corporation or any entity, public or private in nature.
(17) "Residential Property." A parcel of real property which is developed
and zoned either in part or in whole for residential purposes, other
than transient uses such as hotels and motels.
(18) "Simple Tone Noise." A noise characterized by a predominant frequency
or frequencies so that other frequencies cannot be readily distin-
guished.
(19) "Sound Level Meter." An instrument meeting American National Standard
Institute's Standard 51.4-1971 for Type 1 or Type 2 sound level meters
or an instrument and the associated recording and analyzing equipment
which will provide equivalent data.
REV: 1-82 HS -6-4
TUSTIN CITY CODE NOISE CONTROL 4612(20)
(20) "Sound Pressure Level" of a sound, in decibels, shall mean twenty (20)
times the logarithm to the base ten (10) of the ratio of the pressure
of the sound to a reference pressure, which reference pressure shall
be explicitly stated. (Ord. No. 828, Sec. 1, 7-21-80; Ord. No. 845,
Secs. 1--3, 5-18-81)
4613 DESIGNATED NOISE ZONES
The properties hereinafter described are hereby assigned the following noise
zones:
(a) Noise Zone 1: All residential properties.
(b) Noise Zone 2: All commercial properties.
(c) Noise Zone 3: All industrial properties.
(d) Noise Zone 4: All special properties such as hospitals, convalescent
homes, public and institutional schools, libraries and churches.
(Ord. No. 828, Sec. 1, 7-21-80)
4614 EXTERIOR NOISE STANDARDS
(a) The following noise standards, unless otherwise specifically
indicated, shall apply to all property within a designated noise zone:
Noise Standards
Noise Zone Noise Level Time period
1 55 dB(A) 7:00 a.m.--10:00 p.m.
50 dB(A) 10:00 p.m.-- 7:00 a.m.
2 60 dB(A) any time
3 70 dB(A) any time
4 55 dB(A) any time
In the event the alleged offensive noise consists of impact noise, simple tone
noise, speech, music, or any combination thereof, each of the above noise levels
shall be reduced by five ( 5) dB(A) .
(b) It shall be unlawful for any person at any location within the incor-
porated area of the City to create any noise, or to allow the creation of any
noise on property owned, leased, occupied, or otherwise controlled by such
person, when the foregoing causes the noise level, when measured on any other
property to exceed:
(1) The noise standard for a cumulative period of more than thirty (30)
minutes in any hour; or
(2) The noise standard plus five (5) db(A) for a cumulative period of more
than fifteen (15) minutes in any hour; or
(3) The noise standard plus ten (10) dB(A) for a cumulative period of more
than five (5) minutes in any hour; or
(4) The noise standard plus fifteen (15) dB(A) for a cumulative period of
more than one (1) minute in any hour; or .
(5) The noise standard plus twenty (20) dB(A) for any period of time.
REV: 1-82
HS -6-5
TUSTIN CITY CODE NOISE CONTROL 4614(c)
(r_) In the event the ambient noise level exceeds any of the first four (4)
noise limit categories above, the cumulative period applicable to said category
shall be increased to reflect said ambient noise level. In the event the ambi-
ent noise level exceeds the fifth noise limit category, the maximum allowable
noise level under said category shall be increased to reflect the maximum ambi-
ent noise level. (Ord. No. 828, Sec. 1, 7-21-80; Ord. No. 845, Secs. 4, 5,
5-18-81)
4615 INTERIOR NOISE STANDARDS
(a) The following interior noise standards, unless otherwise specifically
indicated, shall apply to all property within a designated noise zone:
Interior Noise Standards
Noise Zone Noise Level Time Period
1 55 dB(A) 7:00 a.m.--10:00 p.m.
45 dB(4) 10:00 p.m.-- 7:00 a.m.
In the event the alleged offensive noise consist of impact noise, simple tone
noise, speech, music, or any combination thereof, each of the above noise levels
shall be reduced by five (5) dB(A).
(b) It shall be unlawful for any person at any location within the incor-
porated area of the city to create any noise, or to allow the creation of any
noise on property owned, leased, occupied, or otherwise controlled by such
person, when the foregoing causes the noise level, when measured within any
other dwelling unit on any residential property, to exceed:
(1) The interior noise standard for a cumulative period of more than five
(5) minutes in any hour; or
(2) The interior noise standard plus five (5) dB(A) for a cumulative peri-
od of more than one (1) minute in any hour; or
(3) The interior noise standard plus ten (10) dB(A) for any period of
time.
(c) In the event the ambient noise level exceeds either of the first two
(2) noise limit categories above, the cumulative period applicable to said
category shall be increased to reflect said ambient noise level. In the event
the ambient noise level exceeds the third noise limit category, the maximum
allowable noise level under said category shall be increased to reflect the
maximum ambient noise level. (Ord. No. 828, Sec. 1, 7-21-80; Ord. No. 845, Sec.
6, 5-18-81)
4616 SPECIFIC DISTURBING NOISES PROHIBITED
It shall be unlawful for any person to make, continue, cause to allow to be made
or continued for any amount of time the following acts and things which are in
excess of the levels described in Sections 4614 and 4615, and which are hereby
declared to be unnecessary, excessive and annoying in violation of this Article:
(1) Loudspeakers, Amplifiers for Advertising. The using, operating or
permitting to be played, used, or operated of any radio receiving set,
musical instrument, phonograph, loudspeaker, sound amplifier, or other
machine or device for the producing or reproducing of sound which is
REV: 1-82
HS -6-6
TUSTIN CITY CODE NOISE CONTROL 4616(1)
cast upon the public streets for the purpose of commercial advertising
or attracting the attention of the public to any commercial building
or structure.
(2) Construction or Repairing of Buildings. The erection (including ex-
cavating), demolition, alteration or repair of any building other
than between the hours of 7:00 a.m. and 6:00 p.m. on weekdays, except
in case of urgent necessity in the interest of public health and
safety, and then only with a permit from the building official, which
permit may be granted for a period not to exceed three (3) days or
less -while the emergency continues and which permit may be renewed for
a period of three (3) days or less while the emergency continues. If
the building official should determine that the activity will be in
substantial conformance with the intent of this Chapter and that the
public health and safety will not be impaired by the erection, demo-
lition, alteration or repair of any building or the excavation of
streets and highways within the hours of 6:00 p.m. and 7:00 a.m. and
between any and all hours on Saturdays and Sundays, he may grant per-
mission for such work to be done within the hours of 6:00 p.m. and
7:00 a.m. and between any and all hours on Saturdays and Sundays, upon
application being made at the time the permit for the work is awarded
or during the progress of the work.
(3) Pile Drivers, Hammers, etc. The operation between the hours of 6:00
p.m. and 7:00 a.m. of any pile driver, steam or gasoline shovel, pneu-
matic hammer, derrick, steam or electric hoist or other appliance, the
use of which is attended by loud or unusual noise. (Ord. No. 828,
Sec. 1, 7-21-80; Ord. No. 845, Sec. 7, 5-18-81)
4617 EXEMPTIONS
The following activities shall be exempted from the provisions of this Chapter:
(a) Activities conducted on the grounds of any public or private nursery,
elementary, intermediate or secondary school or college, public agen-
cy, and public utility.
(b) Outdoor gatherings, public dances, shows and sporting and entertain-
ment events provided said events are conducted pursuant to a permit
(license/permit) issued by the City pursuant to Article 3, Chapter 2
of.the Tustin City Code relative to the staging of said events.
(c) Activities conducted on any park or playground provided such park or
playground is owned and operated by a public entity.
(d) Any mechanical device, apparatus or equipment used, related to or con-
nected with emergency machinery, vehicle or work.
(e) Noise sources associated with construction, repair, remodeling, or
grading of any real property, provided said activities do not take
place between the hours of 6:00 p.m. and 7:00 a.m. on weekdays, in-
cluding Saturday, or at any time on Sunday or a Federal holiday.
(f) All mechanical devices, apparatus or equipment which are utilized for
the protection or salvage of agricultural crops during periods of
potential or actual frost damage or other adverse weather conditions.
(g) Mobile noise sources associated with agricultural operations provided
such operations do not take place between the hours of 6:00 p.m. and
7:00 a.m. on weekdays, including Saturday, or any time on Sunday or a
Federal holiday.
REV: 1-82 HS -6-7
TUSTIN CITY CODE NOISE CONTROL
4617(h)
(h) Mobile noise sources associated with agricultural pest control through
pesticide application provided that the application is made in ac-
cordance with restricted material permits issued by or regulations en-
forced by the Agricultural Commissioner.
(i) Noise sources associated with the maintenance of real property pro-
vided said activities take place between the hours of 7:00 a.m. and
6:00 p.m. on any day except Sunday or Federal holidays, or between the
hours of 9:00 a.m. and 6:00 p.m. on Sunday or Federal holidays.
(j) Any activity to the extent regulation thereof has been preempted by
State or Federal law.
(k) Noise sources associated with the maintenance, repair, remodeling,
grading and landscaping of residential real property performed by the
owner, provided such activity does take place between the hours of
7:00 a.m. and 9:00 p.m. This section does not authorize noise sources
performed by independent building trades contractors.
(1) Noise sources associated with the maintenance and repair of personal
property performed by the owner on the owner's residential property,
provided such activity takes place between the hours of 7:00 a.m. and
9:00 p.m. This section does not authorize noise sources by indepen-
dent repairmen or technicians. (Ord. No. 828, Sec. 1, 7-21-80)
4618 SCHOOLS, HOSPITALS, COURTS AND CHURCHES
It shall be unlawful for any person to create any noise which causes the noise
level at any school, hospital, court, or church while the same is in use, to ex-
ceed the noise limits as specified in Section 4614 prescribed for the assigned
noise zone in which the school, hospital, or church is located, or which noise
level unreasonably interferes with the use of such institutions or which un-
reasonably disturbs or annoys patients in the hospital, provided conspicuous
signs are displayed in three (3) separate locations within one-tenth of a mile
of the institution indicating the presence of a school, church, court, or
hospital. (Ord. No. 828, Sec. 1, 7-21-80)
4619 AIR CONDITIONING AND REFRIGERATION
During a one-year period following the effective date of Ordinance No. 828 the
noise level standards as specified in Sections 4614 and 4615 shall be increased
by eight (8) dB(A) where the alleged noise source is an air-conditioning
apparatus or refrigeration system, which was installed prior to the effective
date of said Ordinance. (Ord. No. 828, Sec. 1, 7-21-80)
4620 NOISE LEVEL MEASUREMENT CRITERIA
Any noise level measurements made pursuant to the provisions of this Chapter
shall be performed using a sound level meter as defined in Section 4612. The
location selected for measuring exterior noise levels shall be at any point on
the affected property. Interior noise measurements shall be made within the
dwelling unit affected by exterior noise. The measurement shall be made at a
point at least four (4) feet from the wall, ceiling, or floor nearest the
alleged offensive noise source and may be made with the windows of the affected
unit open. (Ord. No. 828, Sec. 1, 7-21-80)
REV: 1-82 HS -6-8
TUSTIN CITY CODE NOISE CONTROL 4621
4621 MANNER OF ENFORCEMENT; ADOPTION OF TITLE 4, DIVISION 6, CODIFIED
ORDINANCES OF ORANGE COUNTY
The Orange County Health Officer and his duly authorized representatives, the
Tustin Police Chief and his authorized representatives, and the Tustin Building
Official, and such city employees as designated by the City Chief Administration
Officer, are hereby empowered to, and it shall be their duty to, enforce the
provisions of this Chapter, and the provisions of Title 4, Division 6 of the
Codified Ordinances of the County of Orange, adopted hereby by reference. Said
officials, representatives and employees are also authorized pursuant to
California Penal Code Section 836.5, to arrest any person without a warrant when
they have reasonable cause to believe that such person has committed a mis-
demeanor in their presence.
No person shall interfere with, oppose or resist any authorized person charged
with enforcement of this Chapter while such person is engaged in the performance
of his duty. (Ord. No. 828, Sec. 1, 7-21-80; Ord. No. 845, Sec. 8, 5-18-81)
4622 VARIANCE PROCEDURE
The owner or operator of a noise source which violates any of the provisions of
this Chapter may file an application with the Health Officer for a variance from
the provisions thereof wherein said owner or operator shall set forth all
actions taken to comply with said provisions, the reasons why immediate com-
pliance cannot be achieved, a proposed method of achieving compliance, and a
proposed time schedule for its accomplishment. Said application shall be
accompanied by a fee in the amount of Seventy -Five Dollars ($75.00) or as here-
inafter amended by the Orange County Board of Supervisors. A separate applica-
tion shall be filed for each noise source; provided, however, that several
mobile sources under common ownership, or several fixed sources on a -single
property may be combined into one (1) application. Upon receipt of said appli-
cation and fee, the Health Officer shall refer it with his recommendation there-
on within thirty (30) days to the Noise Variance Board for action thereon in
accordance with the provisions of this Chapter.
An applicant for a variance shall remain subject to prosecution under the terms
of this Ordinance until a variance is granted. (Ord. No. 828, Sec. 1, 7-21-80)
4623 NOISE VARIANCE BOARD
The Noise Variance Board, as established by Section 46.0013 of the Codified
Ordinances of the County of Orange, California, shall evaluate all applications
for variance from the requirements of this Chapter and may grant said variances
with respect to time for compliance, subject to such terms, conditions and re-
quirements as it may deem reasonable to achieve maximum compliance with the pro-
visions of this Chapter. Said terms, conditions and requirements may include,
but shall not be limited to, limitations on noise levels and operating hours.
Each such variance shall set forth in detail the approved method of achieving
maximum compliance and a time schedule for its accomplishment.
In its determinations said Board shall consider the magnitude of nuisance caused
by the offensive noise; the uses of property within the area of impingement by
REV: 1-82 HS -6-9
TUSTIN CITY CODE NOISE CONTROL 4623
the noise; the time factors related to
of remedial work; the economic factors
went; and the general public interest
said Board shall be by resolution and
for enforcement. Any violation of the
(Ord. No. 828, Sec. 1, 7-21-80)
4624 APPEALS
study, design, financing and construction
related to age and useful life of equip -
and welfare. Any variance granted by
shall be transmitted to the Health Officer
terms of said variance shall be unlawful.
Within fifteen (15) days following the decision of the Variance Board on any ap-
plication the applicant, the Health Officer, or any member of the City Council,
may appeal the decision to the City Council by filing a notice of appeal with
the Secretary of the Variance Board. In the case of an appeal by the applicant
for a variance, the notice of appeal shall be accompanied by a fee to be com-
puted by the Secretary on the basis of the estimated cost of preparing the
materials required to be forwarded to the City Council as discussed hereafter.
If the actual cost of such preparation differs from the estimated cost appropri-
ate payments shall be made either to or by the Secretary.
Within fifteen (15) days following receipt of a notice of appeal and the appeal
fee, the Secretary of the Variance Board shall forward to the City Council
copies of the application for variance; the recommendation of the Health
Officer; the notice of appeal; all evidence concerning said application received
by the Variance Board and its decision thereon. In addition, any person may
file with the City Council written arguments supporting or attacking said de-
cision and the City Council may in its discretion hear oral arguments thereon.
The City Clerk shall mail to the applicant a notice of the date set for hearing
of the appeal. The notice shall be mailed at least ten (10) days prior to the
hearing date. Within sixty (60) days following its receipt of the notice of the
appeal, the City Council shall either affirm, modify, or reverse the decision of
the Variance Board. Such decision shall be based upon the'City Council's
evaluation of the matters submitted to the City Council in light of the powers
conferred on the Variance Board and the factors to be considered, both as enu-
merated in Sections 4622 and 4623.
As part of its decision the Council may direct the Variance Board to conduct
further proceedings on said application. Failure of the City Council to affirm,
modify or reverse the decision of the Variance Board within said sixty-day peri-
od shall constitute an affirmance of the decision. (Ord. No. 828, Sec. 1,
7-21-80)
4625 VIOLATIONS; MISDEMEANORS
Any person violating any of the provisions of this Chapter shall be deemed
guilty of a misdemeanor. Each day such violation is committed or permitted to
continue shall constitute a separate offense and shall be punishable as such.
The provisions of this Chapter shall not be construed as permitting conduct not
prescribed herein and shall not affect the enforceability of any other applica-
ble provisions of law. (Ord. No. 828, Sec. 1, 7-21-80; Ord. No. 845, Sec. 9,
5-18-81)
REV: 1-82 HS -6-10
SPECIFICATIONS:
Frequency Response, 4 Feet on Axis,
Swept One -Third -Octave Random Noise,
Anechoic Environment
(see Figure 2 for curve):
275-14,000 Hz nominal
(t5 dB 580-6,400 Hz)
Power Handling Capacity (average sine
wave power above 400 Hz for 24 hours):
Up to 60 watts
Voice Coil Impedance (nominal):
8 ohms
Horizontal Beamwidth:
66°
(-6 dB, 2,000 Hz, long speaker axis
vertical to the floor)
Vertical Beamwidth:
50°
(-6 dB, 2,000 Hz, short speaker axis
.vertical to the floor)
Sound Pressure Level (60 watts at 4 ft
on axis, 2,000 Hz octave band of
random noise):
127.5 dB
EIA Sensitivity
(1 milliwatt at 30 It on
axis per EIA Standard SE -103):
63.0 d8
Terminal Connections:
306 mm (12 in.) minimum
SJTO-18-2 cable,
phased and color
coded (white is positive)
Color,
PA60:
Mesa tan
PA60M:
White
Finish,
PA60:
Molded -in and baked
enamel paint
PA60M:
Molded -in weatherproof color, baked
enamel paint and stainless steel
hardware
Dimensions:
280 mm (11 in.) high
165 mm (6.5 in.) wide
216 mm (8.5 in.) deep
Mounting:
Universal Swivel Base
(adjustable in all planes),
or flush mounting
(see Figure 1).
Net Weight:
1.84 kg (4lbs, 1 oz)
Optional Transformer:
TR30D (70.7!25 volts)
DESCRIPTION AND APPLICATIONS
The Electro -Voice Model PA60 is a
conservatively rated 60 -watt, high-power
reentrant paging projector designed to
provide highest articulation and maximum
reliability in any public address or paging
application. The PA60M is designed for
marine applications using stainless steel
hardware to prevent rust. Many unique
engineering advances are incorporated,
including use of a high -impact molded
housing which is virtually immune to
weather, abuse, and deterioration. The PA60
features the highest efficiency and power
capacity in its price class due to the use of
an entirely new diaphragm and ultra -precise
high-temperature voice coil assembly,
combined with an extremely powerful
ceramic magnetic structure. PROTEF m'
coating is used to provide added protection
of the PA60 voice -coil. It is a Teflon -based
coating which is permanently bonded to the
magnetic -gap face of the top plate.
Occasionally, violent power peaks of several
seconds in duration may expand a normal
driver's voice -coil into contact with the top
plate, causing deterioration. EV -exclusive
PROTEF lubricates any rubbing contact,
allowing instant coil temperature reduction
without mechanical damage. It also provides
direct electrical insulation between the coil
and steel top plate.The unprecedented high
efficiency and output is combined with
unusually extended frequency response and
low distortion for maximum fidelity with both
speech and music. The rectangular horn
provides widest dispersion when the long
axis of the speaker is mounted vertical to the
floor. However, the swivel bracket may be
rotated to permit mounting in the other
plane. The sturdy mounting bracket makes
the PA60 ideal for heavy-duty mobile
applications as well as fixed installations. In
the event adjustment is required in horn
position, only a single wing nut need be
loosened for quick and easy repositioning
Patent Pending
216.0 mm
-- (8.50 in.)
9/32 in. DIA HOLES
3 PLACES
EVENLY SPACED
ON 60.0 mm 12.375 in.) DIA
1200/ I 1200 HOLE
SPACING
FOR
SWIVEL
BASE
1200
140
130
J
a
CO 120
Z
H
110
O
100
165.0 mm
(6.50 in.)
i
280.0 mm
(11.00 in.)
HOLE
267.0 mm SPACING
(10.50 in.) I FOR
FLUSH
MOUNT
114.0 mm
(4.50 in.)
FIGURE 1 — Dimensions
SPL RATING
70 30 50 100 700 500 1000 7000 5000 10000 20000
FREQUENCY IN HERTZ
FIGURE 2 — Axial Frequency Response
(1/3 -Octave Bands of P-.1dom Noise.
60 Watts in at 4 Feet)
,L6ATION
Removing the Mounting Base
The base may be easily removed to
simplify speaker installation. To remove
the base, simply back off the single
wingnut to approximately the end of
its bolt. Remove the base with a sliding
motion. It is not necessary to
completely remove either the wingnut
or its bolt. Later, after the base is
mounted, the speaker may be reinstalled
on the base with a similar sliding
motion, adjusted to any angular
Position, and the wingnut tightened.
Mounting the Base
The removable mounting base has
three evenly -spaced holes on a
60.3 mm (2.38 in.) diameter circle.
This diameter is small enough to be
conveniently mounted on the cover
of a standard 4 -inch square or
octagon electrical outlet box. The
base may be used as a template. In
addition, the base is slotted for
mounting with 1/2 -inch steel banding
material. Banding tools and materials
are available commercially and permit
attachment to I -beams, pillars, or
similar structural supports, where
screw -mounting is impractical. Finally,
the base may also be attached to many
structural supports with small C -clamps
providing appropriate safety measures
are observed.
Connection to System
A single PA60 has a nominal
impedance of 8 ohms, and should be
connected to the amplifier 8 -ohm
output tap. When two or more units
are connected in parallel, for proper
phasing, all the terminal wires color -
coded white should be connected to
one side of the line and all the black
terminal wires should be connected to
the opposite side. For series operation,
the black wire of one unit should be
connected to the white wire of the next,
etc. The impedance of combinations of
PA60's should be calculated and
carefully matched to the amplifier
output impedance for highest
efficiency
Horn Orientation
In general the rectangular PA60 series
should be oriented with its long axis
vertical. In this way coverage over an
entire 66 -degree angle will be essentially
uniform at all important frequencies. In
certain applications, however, it may be
desirable to restrict horizontal dispersion
to prevent interference to adjoining areas.
The horn may be readily adjusted to
place the long axis in the vertical or
horizontal position, or in any intermediate
position.
ARCHITECTS' AND ENGINEERS'
SPECIFICATIONS
The speaker shall be an integral driver and
reentrant horn. Axial frequency response
shall be 275 to 14,000 Hz nominal and shall
be t 5 dB from 580 Hz to 6,400 Hz
('!7 -octave -bands of random noise). Power
handling capacity shall be 60 watts average
sine wave power above 400 Hz for a
minimum of 24 hours. Voice -cod impedance
shall be 8 ohms nominal. The unit shall have
a 1 5-m diameter aluminum voice coil
mounted on a polyimide form joined t�,
006 -in. Thk. phenolic dome. Horizontal
beamwidth to be 66° and vertical beamwidth
to be 500 with a 2,000 Hz -octave -band -pink -
noise input when the long axis is vertical to
the horizontal plane (6 -dB -down points.
2,000 Hz -octave -band of random noise)
Sound pressure level shall be 127 dB on
axis at 4 feet with 60 watts input (2,000 Hz -
octave -bands of random noise). EIA
sensitivity shall be 63 dB (EIA Standard
SE -103).
The horn shall be molded acrylic, capable of
satisfactory mechanical performance in the
temperature range from —40°C (-40°F) to
71 °C (160°F) and not subject to sunlight
embrittlement. Other major external speaker
parts shall be die-cast zinc, finished in mesa
tan baked enamel to match the molded horn
parts. All components shall be resistant to
damage from weather, moisture, and fungus.
The mounting base shall be removable
without first removing any other speaker
parts. The base mounting holes shall be
evenly spaced on a 60.3 mm (2.38 -in.)
diameter circle. The base shall permit
angular adjustment of the speaker in any
plane, after loosening a single wingnut, and
a large Phillips bolt located at rear of the
speaker. The input cable shall be 343 mm
(13.50 -in.) long minimum SJO-18-2, phased
and color -coded (white positive).
For further information about
applications, consult the Electro -Voice
publication: "The Electro -Voice Guide
to Commerical Sound Reinforcement
and Public Address Systems,'' available
without charge by writing to:
Electro -Voice, Inc., Advertising Dept.,
600 Cecil Street, Buchanan, MI 49107.
WARRANTY (Limited)—
Electro-Voice Sound Reinforcement 8
Public Address Loudspeakers and
accessories are guaranteed for five years
from date of original purchase against
malfunction due to defects in workmanship
and materials. If such malfunction occurs,
unit will be repaired or replaced (at our
option) without charge for materials or
labor if delivered prepaid to. the proper
Electro -Voice service facility. Unit will
be returned prepaid. Warranty does not
cover finish or appearance items or
malfunction due to abuse or operation
at other than specified conditions.
Repair by other than Electro -Voice or
its authorized service agencies will
void this guarantee.
For correct shipping address and
instructions on return of Electro -Voice
products for repair and locations of
authorized service agencies, please
write: Service Department,
Electro -Voice, Inc., 600 Cecil Street.
Buchanan, Michigan 49107
(Phone: 616/695-6831) or
Electro -Voice West, 8234 Doe Avenue,
P.O. Box 3297, Visalia, CA 93277
(Phone: 209/651-7777).
Electro -Voce also maintains complete
facilities for non -warranty service
Specifications subject to change
without notice.
0°
330' 30°
300'
/ \ \
60°
� �
�
l
t
270°
90.
240°
/
120°
210°
150'
500 Hz
180°
1,000 Hz —
—
2,000 Hz — ..
-- SCALE IS 5 DECIBELS PER DIVISION
4,000 Hz — — —
8,000 Hz • • •
• • 0°
330° 30°
300'
��� 60'
'
I
270`
•'
— —! 90
,
240'
�� /
120'
1
210° . 150
180 -
FIGURE 3 — Polar Response
(Octave Bands of Random Noise)
Acoustical Analysis of the
Tustin Auto Center
INTRODUCTION
At the request of Bonnie Holmes of the Irvine Company, John Hilliard
and Associates have prepared an acoustical evaluation of the current
and future potential noise impacts to the proposed site of the Tustin
Auto Center and adjacent residential areas. The purpose of the study
is to 1 ) identify the current noise impact across the project site, 2)
describe the future potential noise impacts the proposed project will
have on the surrounding community, and 3) provide general mitigation
measures to reduce the potential noise impact.
ANALYSIS
Current Noise Environment
On September 17, 1984, current noise measurements were made to
determine the ambient noise environment on the site and at residential
areas of concern northwest of Browning Avenue. Measurements were
taken at three locations in this area. The measurement sites are 1)
at Browning Avenue, south of Bryan Avenue, 2) at the northwest corner
of Browning Avenue and San Juan, and 3) at the southeast corner of
Laguna Road and Browning Avenue.
Measurements were taken from 3:00 p.m. to 4:00 p.m. in the afternoon.
The noise level readings were made using a Bruel and Kjaer 2218
Integrating Sound Level Meter. The results of the measurements at
the Browning Avenue are as follows:
Table 1
Browning Avenue Measurement Results — September 17, 1984
Site Time Measured Leq
1 3:00 pm 61
2 3:20 pm 60.2
3 3:40 pm 69
SOUND INFORMATION
TUSTIN AUTO CENTER
The Sound Information system consists of a computer program with audio-
visual capabilities. This program translates numerical information about
sound into acoustic examples. A microcomputer controls the system playing
tape recording sounds at precisely controlled volume levels.
THE AUTO CENTER
The residential neighbors of the Auto Center have raised the question
of possible disturbance created by the loudspeaker announcements within
the dealership's service areas. In response to these concerns, The Irvine
Company hired Marshall Long Acoustics to analyze the impacts if a loudspeaker
system should be allowed at McLean Cadillac, the automobile agency which
is located nearest to existing and future residential areas.
DESIGNING THE SPEAKER SYSTEM
Marshall Long Acoustics specializes in the design of speaker systems for
places of public assembly. The firm has developed technological tools
for designing systems where amplified sound is spread evenly across
the listener area. Achieving this objective requires the use of multiple
loud speakers precisely directed and adjusted as to volume. Since sound
diminishes logarithmically with distance, a distributed announcement system
can have individual speakers set at lower volumes than a "speaker on
a pole" and achieve similiar area coverage. The McLean Cadillac paging
system makes use of Electro -Voice Model PA60 directive speakers, positioned
behind a permiter sound wall or within buildings in the shop area.
NOISE LEVEL PREDICTIONS
Mathmatical equations can be used to predict noise levels at any location
in relationship to the vicinity of the paging system. The acoustical engineers
first developed a system that would produce an 80 decibel level of announce-
ments within the dealership and then calculated volumes as they would
be heard at several distances from the site. Sound levels for announcements
of three off-site locations have been calculated for use in the Sound Infor-
mation presentation. As described in the presentation, location one is
near the center of the dealership. Location two is directly across Jamboree
Boulevard at the sound wall which will encircle the future residential
units. This point is approximately 165 feet from the outer wall of the
dealership. The third location is 80 feet beyond this within land planned
for townhouse development.
This location approximates the position of the nearest residential structure.
The projects' site plans indicate carport structures and a border will
separate the location from Jamboree. Sound exposure was also calculated
for a fourth point adjacent to Browning Avenue in the vicinity of the
school. This point is 1,800 feet from the outer wall of the dealership,
at the far side of the area planned for the townhouses.
Forecasts under three conditions were made for each of the locations.
The first of these was a "worst case" example. This represents what
sound would be like absent any consideration of loudspeaker directivity,
positioning of speakers within buildings, or the effects of the perimeter
wall. It should be noted that this "worst case" incorporates the distributed
speaker system designed by Marshall Long Acoustics and would be less
obtrusive than sounds from a "loudspeaker on a pole" system.
The second condition reflects sound levels as they would be reduced
through dealer mitigations: direction of speakers away from residential
areas, placement within service bays or behind and below an 8' perimeter
wall. The third set of estimates assume all of the above dealer mitigations,
adding the sound attenuating effects of buildings (with their own perimeter
wall) located between Jamboree and Browning. The table below shows
the sound level values as they are presented in the program.
Sound Levels Used in Presentation (dB_A)
Mitigation: 1 2 3 4
Within Across Beyond At
Dealership Jamboree Jamboree Browning
@ 160 ft. @ 240 ft. @ 1600 ft.
No Mitigations 75 58.4 55.0 44.2
Dealer Mitigations 75 43.8 40.4 29.6*
Dealer Mitigations &
Development between 75 43.8 30.4 19.6**
Browning & Jamboree
* Behind carport @ 10dB, no building reflection assumed.
** Excess barrier attenuation estimated @ 10dB.
Background sounds along Browning were measured by John Hilliard
Associates, a Tustin Acoustical Engineering firm as well as by Marshall
Long Acoustics. Measurements were taken on weekday afternoons and
ranged between 60 and 65dB(A) . (No earth moving or Auto Center
construction sounds were present when these measurements were made.)
A background sound level of 62 dB(A) is used in the demonstration and
assumed to be representative of all locations since all are equal distance
from the freeway which creates the dominant background sound.
THE EQUIPMENT
The digitally operated attenators used in the presentation system are
stepped in 1.5 dB increments. The values appearing on the screen reflect
the exact results of the Marshall Long studies and the sound level heard
is corrct to the nearest .75 dB. A 3dB changes in sound is considered
to be the minimum difference detectable by an average listener. It should
also be noted that the sound levels heard are affected by the distance
between the listener and the position of the speaker. Sounds will be
proportionably correct at any distance but can vary from the absolute
values shown on the display. Staff will indicate the location where
sound exposure corresponds exactly to the displayed values.
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SITE
LOCATION
1
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2
Across Jamboree Ave. at sound wall
(160' from Dealership)
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'ice _ JN 23375
(AUTO C • ER)
SEWAY (61
Tustin Auto Center
Sound Sample Locations
SITE
LOCATION
1
Within the Dealership
2
Across Jamboree Ave. at sound wall
(160' from Dealership)
3
Beyond Jamboree Avenue
(240' from Dealership)
4
At Browning Avenue
(1800' from Dealership)
'ice _ JN 23375
(AUTO C • ER)
SEWAY (61
Tustin Auto Center
Sound Sample Locations