HomeMy WebLinkAboutOB 3 AIRPORT STATUS 06-03-91OLD BUSINESS NO. 3
6-3-91
♦, 9
ATE: Inter -Cam
JUNE 31 1991
TO: WILLIAM A. HUSTON, CITY MANAGER
FROM: COMMUNITY DEVELOPMENT DEPARTMENT
SUBJECT: AIRPORT STATUS REPORT
RECOMMENDATION
Receive and file.
DISCUSSION
The Community Development Department has continued to monitor
airport issues and attend all relevant meetings. Since the last
Airport Status Report to the City Council on March 18, 1991, staff
has attended meetings of the Coalition for Responsible Airport
Solution and the Orange County Cities Airport Authority, and has
reviewed the Airport Environs Land Use Plan and coordinated the
review of the John Wayne Airport Noise Abatement Quarterly Report
by the City's noise consultants. The following items summarize the
most significant local airport activities that have taken place
during the past two months.
Coalition for Responsible Airport Solution (CRAS) Kathy Weil,
our City representative for CRAS, and Dana Ogdon, Senior Planner,
attended the CRAS annual membership meeting on April 18, 1991. As
Kathy Weil did not prepare a report, the following is from a memo
prepared by Dana Ogdon. General Arthur Bloomer (retired), a
supporter of rail transportation and the proposed conversion of
George' Air Force Base, discussed the "Future of Air and Ground
Transportation. in Orange County" and stressed that efforts should
be aimed at solving our general transportation problems through a
coordinated effort involving rail, air, and other existing farms of
transportation. In General Bloomer's opinion, although MCAS -El
Toro is feasible geographically for a commercial airport, it should
be retained as a military base because it is compatible with
surrounding land uses, and intensification of the base's function
could exacerbate the existing air space management problem there.
It was reported that the City of Irvine is interested in annexing
MCAS -E1 Toro. The Irvine Company hopes to commercially develop
surrounding properties, but is unwilling to have the land annexed
because of potentially restrictive land use regulations imposed by
the City of Irvine.
-- City Council Report
Airport Status Report
June 3, 1991
Page 2
The Orange County Cities Airport Authority (OCCAA) - Staff attended
the OCCAA meeting on May 15, 1991. Because efforts are being
focused elsewhere during this downturn of the economy, the OCCAA
canceled its February, March, and April meetings. At the most
recent meeting, the OCCAA board indicated that the Southern
California Association of Governments (SCAG) has recommended that,
1) Christianitos Canyon and Portrero Los Pinos never again be
considered as airport sites, 2 ) South Camp Pendleton not be studied
at this time and, 3) March Air Force Base be included in a Military
Airport Contingency Study to be conducted by SCAG. The Board also
expressed interest in expanding the membership of the OCCAA.
Airport Land Use Commission (ALUC) - On April 29, 1991, the City of
Tustin received a copy of the amended Airport Environs Land Use
Plan (AELUP) . Staff is reviewing the document to identify Tustin's
concerns and is reviewing and responding to a County -prepared
questionnaire to determine whether Tustin is in fact inconsistent
with the AELUP. If changes to the General Plan are needed, staff
will work with the General Plan consultants to make Tustin a
consistent agency.
Airport Noise Report - In late March, 1991, J.J. Van Houten and
Associates, Inc., Tustin's noise consultants, prepared a review of
County -prepared John Wayne Airport Noise Abatement Program
quarterly reports for 4th quarter 1989 through 3rd quarter, 1990.
A copy of their report is attached.
From 1989 through the third quarter of 1990 there has been a 2'dB
increase in aircraft -generated Community Noise Equivalent Level
(CNEL) at monitoring station M5. Although the average number of
quarterly jet operations has increased, other changes such as an
increase in the percentage of nosier aircraft, an increase in the
number of evening and nighttime arrivals, a decrease in aircraft
altitude or a shift in landing patterns closer to the monitoring
station are probably causing the increased CNEL. As people
typically react to single event noise levels rather than long-term
noise exposure (CNEL), noise complaints should not increase. It is
estimated that increased flight operations as approved by the Board
of Supervisors under the Phase II Access Plan will further increase
noise levels by 2 dB throughout the city, raising future CNEL
levels in the City to between 53 and 60 dB. However, this is below
the City, County, and State criteria of 65 dB for residential
areas.
City Council Report
Airport Status Report
June 3, 1991
Page 3
CONCLUSION
Because the issues discussed above are of considerable importance
to the City of Tustin, the Community Development Department will
continue to monitor airport issues unless otherwise directed by
Council.
Scott Reekstin Christine Shi.nglet
Assistant Planner Assistant City Manager
Attachment: Report from J.J. Van Houten and Associates
J. J. VAN HOUTEN & ASSOCIATES, Inc.
JOHN J. VAN HOUTEN, PE, Principal Consultant
DAVID L. WIELAND, Principal Engineer
ROBERT WOO, Senior Engineer
STUART TAY, Associate Engineer
March 26, 1991
1260 EAST KATELLA AVENUE, ANAHEIM, CALIFORNIA 92805
(714) 978-7018 (714) 635-9520 FAX (714) 939-0648
BAR 2 8 1991
COMMUNITY DEVLEOPJ.�
Project File 2306-91
CITY OF TUSTIN
Community Development Department
300 Centennial Way
Tustin, CA 92680
Attention: Ms. Rita Westfield, Assistant Director
Subject: Review of John Wayne Airport Noise Abatement Program
Quarterly Reports, 4th Quarter 1989 through 3rd
Quarter, 1990
Reference: 1. "Data Evaluation and Aircraft Noise Impact Study
for the City of Tustin," J. J. Van Houten and
Associates, Inc., January 8, 1990
2. "Noise Abatement Program Quarterly Report for the
Period: October 1, 1989 through December 31,
1989," John Wayne Airport .
3. "Noise Abatement Program Quarterly Report for the
Period: January 1, 1990 through March 31, 1990,"
John Wayne Airport
4. "Noise Abatement Program Quarterly Report for the
Period: April 1, 1990 through June 30, 1990,"
John Wayne Airport
5. "Noise Aba 4ement Pror� r a n Quarterly Report f Or the
Period: July 1, 1990 through September 30, 1990,"
John Wayne Airport
Dear Ms. Westfield:
As requested, we have reviewed the four referenced quarterly
reports for the noise abatement program at John Wayne Airport. The
following provides our findings with regard to airport operations
and their impact on the City of Tustin:
1. Referring to Figures 1 and 2, the general trend from 1989
through the 3rd quarter of 1990 is an increase in aircraft -
generated CNEL at remote monitoring station M5. Based upon
CITY OF TUSTIN
PROJECT FILE 2306-91
data for the 1st through 3rd quarters, the average annual CNEL
at station M5 is 55 dB for 1990. This is a 2 dB increase over
the average annual CNEL of 53 dB for 1989. (Note: The noise
contours for John Wayne Airport are based on average annual
CNEL values measured at each remote monitoring station.)
2. Referring to Figure 2, the average number of quarterly jet
operations at John Wayne Airport has increased from 186 in the
4th quarter of 1989 to as high as 197 in the 2nd quarter of
1990. However, this increase in the number of operations is
not sufficient to account for the increase in average annual
CNEL at station M5 unless other changes have occurred as well.
For example, the percentage of noisier aircraft may have
increased, the number of evening and nighttime arrivals may
have increased, the altitude of the aircraft may have de-
creased, or the landing pattern may have shifted closer to the
monitoring station. There is insufficient information in the
quarterly reports to determine the factor(s) leading to the
increased noise levels at station M5.
3. Referring to Figure 2, there does not appear to be any correla-
tion between the average number of noise complaints received
from the Tustin/Orange area and the average quarterly aircraft
CNEL or the average quarterly number of jet operations. This
strongly implies that people are reacting to the single event
noise levels rather than the long-term noise exposure (CNEL).
This is consistent with the findings of the referenced aircraft
noise impact study (Reference 1).
4. As indicated in item 1, above, the annual average CNEL measured
at station M5 was 53 dB in 1989. Based on information for the
first three quarters, the annual average CNEL for 1990 will be
55 dB. Both values are slightly less than the 56 to 57 dB that
was estimated for the station in the referenced aircraft noise
impact study (Reference 1).
AIRCRAFT NOISE CONTOURS
In 1988, an exterior aircraft noise monitoring effort was conducted
throughout the City of Tustin by the John Wayne Airport Noise
Abatement Office and by J. J. Van Houten and Associates, Inc.1
Aircraft -generated single event noise exposure levels (SENEL's)
were measured at twelve locations in Tustin over a five month
period. The noise contours of Figure 3 were developed using this
measured data and the operational data provided in the John Wayne
"Data Evaluation and Aircraft Noise Impact Study for the
City of Tustin;" J. J. Van Houten and Associates, Inc.
6
J. J. VAN HOUTEN & ASSOCIATES, Inc.
CITY OF TUSTIN PROJECT FILE 2306-91
Airport Phase I Access Plan. Referring to the figure, it was
estimated that current operations generate a community noise
equivalent level (CNEL) that ranges from 51 to 58 dB in the City of
Tustin, with a CNEL of about 56 dB at monitoring station M5. It is
estimated that with the implementation of the Phase II Access Plan
on October 1, 1990, the aircraft noise exposure will increase by 2
dB throughout the city, as shown in Figure 4. This results in a
future CNEL that ranges from 53 to 60 dB in the city of Tustin,
with a CNEL of about 58 dB at station M5.
As indicated in Item 1, above, the annual average CNEL measured at
station M5 in 1989 was 53 dB. Therefore, to obtain the 1989 Phase
I noise contours and the future Phase II contours (based on 1989
data), the contour values indicated in Figures 3 and 4 should be
reduced by 3 dB. The shape and location of the contours remains
unchanged. It may be concluded, then, that in 1989 the annual
average CNEL generated by aircraft ranged from 48 to 55 dB within
the city of Tustin. This is well below the City, County and State
criteria of 65 dB for residential areas.
Based on data through the third quarter, the annual average CNEL at
station M5 will be 55 dB in 1990. However, this is tentative since
the Phase II Access Plan, with its increased flight operations, was
implemented during the fourth quarter of 1990. In any event, the
1990 Phase I noise contours and the future Phase II contours (based
on 1990 data) may be obtained by reducing the contour values
indicated in Figures 3 and 4 by 1 dB. Thus, in 1990, it is
estimated that the aircraft -generated CNEL ranges from 50 to 57 dB
within the city of Tustin. With full implementation of the Phase
II Access Plan, it is expected that the annual average CNEL will
range from 52 to 59 dB. Again, these values are well below the
residential standard of 65 dB.
If you have any questions, please contact the undersigned at
714/978-7018.
Very truly yours,
J. J. VAN UTEN &
1
ohn J.? V n Houten,
onsult' g Engineer
JJVH/ DLW/ rrp
ASSO IATES, INC.
P. E.
in Acoustics
3
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