HomeMy WebLinkAboutRPT 2 AIRPORT STATUS 09-07-93AGEND/L.-.
REPORTS NO. 2
9-7-93
DATE:
SEPTEMBER ?, 1993
inter-Com
TO: WILLIAM A. HUSTON, CITY MANAGER
FROM: COMMUNITY DEVELOPMENT DEPARTMENT
SUBJECT: AIRPORT STATUS REPORT
RECOMMENDATION
Receive and file.
FISCAL IMPACT
Monitoring of the various special interest groups concerned with
airport issues requires the use of routinely scheduled staff time
and is therefore part of the City's normal budgeted expenses. The
City retains · the consulting firm of J. J. Van Houten and
Associates, Inc. for review of noise related items and there is a
limitation of one-thousand dollars ($1,000) per review of each JWA
Quarterly Noise. Report.
DISCUSSION
Notice of Preparation (NOP) for UPS Proposal at John Wayne Airport
Staff has received and responded to a recent NOP for a proposal for
John Wayne Airport (JWA) to incorporate air cargo carriers into the
allotted flights arriving and departing from JWA. The NOP is the
first step in the process for preparation of an Environmental
Impact Report (EIR). The proponent for the proposal is United
Parcel Service (UPS). The proposal would require further
amendments to Phase 2 - Access Plan for JWA by reallocating
regulated Class "A" flights or allowing additional Class "A"
flights. In response to the proposal, staff has forwarded comments
to the County expressing the City's concern over the establishment
of a maximum Single Event Noise Equivalent Level (SENEL) at RMS-7,
controlling hours of operation, the cumulative noise impacts that
would occur due to the potential increase in flights, and
clarification on the characteristics of the type of aircraft
proposed.. Our response was mailed August, 2, 1993. Staff will
continue to monitor this proposal.and has requested that the County
provide copies of their response to the issues identified and all
subsequent environmental documents.
City. Council Report
Airport Status Report
September 7, 1993
Page 2
Orange County Cities Airport Authority (OCCAA)
As directed previously by Council, staff continues to monitor the
activities of the OCCAA. On July 21, 1993, staff attended a
general meeting of the Board. The agenda items included a review
of the work program for the County of Orange's E1 Toro Task Force
and the consideration of the Urban Land Institute (ULI) proposal to
study re-use alternatives for MCAS, E1 Toro. The Board did not
take action on these items other than to express their
disappointment in the County staff's recommendation for
appointments to the Advisory Council for the Re-Use Planning
Process for MCAS, E1 Toro.
The OCCAA Board also expressed their interest in leading the
Aviation Committee, one of the standing committees that report ~o
the Advisory Council, in order to ensure that commercial airport
reuse is considered as the most economically viable land use before
all others. The County deflected this suggestion as much as
possible, but encouraged the Board to seek participation in the
committee.
JWA Noise Abatement Proqram Quarterly Report
J.J. Van Houten and Associates, Inc., Tustin's noise consultants,
prepared a review of the most recent County-prepared John Wayne
Airport Noise Abatement Program quarterly report for the l~st
quarter of 1993. A copy of their report is attached.
For the first quarter of 1993 there has been an increase in the
Community Noise Equivalent Level (CNEL) at monitoring station M7 in
Tustin of two-tenths (.2) of a decibel. However, during the same
period, the number of aircraft operations has decreased to a total
of 15,560 for the quarter from the previous quarter total of
16,411.
Based on data for the first quarter of 1993, the annual average
CNEL at station M7 is estimated to be 56.8 dB for 1993. This is
five-tenths (.5) of a decibel higher than the average annual CNEL
of 56.3 dB for 1992. However, this is below the City, County, and
State criteria of 65 dB for residential areas. The number of
quarterly noise complaints for Tustin/Orange has significantly
decreased for this same time period which does not correspond with
the increase in the average CNEL; however, this does correlate
with the decrease in flights discussed above.
The consultant has again analyzed the relationship between changes
in CNEL and the number of quieter aircraft put into service at John
°City Council Report
Airport Status Report
September 7, 1993
Page 3
Wayne Airport. This analysis shows that the percentage of quiet
Class E aircraft has decreased slightly between 1991, 1992, and the
1st quarter of 1993 as did the weighted average noise level. Class
E aircraft are the quietest of the three types of aircraft (Class
A, AA and E) unique to John Wayne Airport. However, the
classification only applies to departures and in some cases,
aircraft classified as Class E are actually noisier on arrival than
some Class A and AA aircraft. Therefore, the percentage of Class
E aircraft does not significantly affect noise levels at Tustin's
noise monitoring station. As a result, it is difficult to
correlate the types of aircraft flown with the measured CNEL.
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.
A~ E. BonneA/ '
Associate Planner
~ant Dlrectol of
Community Development
Attachments: Report from J.J. Van Houten and Associates'
RW :AB: kd\CCREPORT\a J rpstaS, aeb
j.j. VAN HOUTEN & ASSOCIATES, Inc.
JOHN J. VAN HOUTEN, PE, Principal Consultant
DAVID L. WIELAND, Principal Engineer
ROBERT WOO, Senior Engineer
1260 EAST KATELLA AVENUE, ANAHEIM, CALIFORNIA 92805
{714} 978-7018 {714} 635-9520 FAX {71,~} 939-064,8
July 26, 1993
Project File 2306-91
CITY OF TUSTIN
Community Development Department
15222 Del Arno Avenue
Tustin, CA 92680
-- RECEIVED
J II L 2 6
COMMUNITY
Attention: Ms. Rita Westfield
Subject:
Review of John Wayne Airport Noise Abatement Program Quarterly
RePort, 1st Quarter 1993
Reference: 1.
"Data Evaluation and Aircraft Noise Impact Study for the City of
Tustin," J. J. Van Houten and Associates, Inc., January 8, 1990
.
"Noise Abatement Program Quarterly Report for the Period: Janu-
ary 1, 1993 through March 31, 1993," John Wayne Airport
Dear Ms. Westfield:
As requested' we have reviewed the referenced quarterly report for the noise abatement
program at John Wayne 'Airport. The following provides our findings with regard to
a/rport operations and their impact on the City of Tustin:
o
Referring to Figures 1 and 2, the average annual CNEL at station M7 will be 56.8
dB for 1993 based upon data for the 1st quarter. This is 0.5 dB higher than the
average annual CNEL of 56.3 dB fOr 1991. (NOTE: The noise contours for John
Wayne Airport are based on average annual CNEL values measured at each
remote monitoring station.) However, this estimate is likely to be high. As shown
in Figures 1 and 2, the average CNEL during the 1st quarter of the year is
typically higher than during the remaining three quarters. Further, it should be
noted that the quarterly CNEL is skewed by the lack of data for the entire month
of January.
.
Referring to Figure 2, there does not appear to be any correlation 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. As indicated in the figure, the number of noise complaints'was lower
e
in the first quarter of 1993 than in 1992 even though the average quarterly CNEL
has increased slightly.' Referring to both Table 2 and Figure 2, the number of
complaints also does not correlate with the percentage of noisier aircraft (Class A
and AA) landing at the airport.
As indicated in Item 1, above, the annual average CNEL measured at station M7
will be about 57 dB based on information through the first quarter of 1993. This
is slightly less than the 58 dB that was estimated for the station in the referenced
aircraft noise impact study for the Phase 2 Access Plan (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. (Reference 1). Aircraft-generated single event noise exposure levels
(SENEL's) were measured at twelve locations in Tustin over a five month period.
As a result of this effort, noise contours were developed for John Wayne Airport as they
impact the City of Tustin. Although the shape of the contours does not change (since'
flight tracks are fixed), the value of the noise contours does change with different levels of
operations at the, airport and different mixes of aircraft.
Figure 3 provides the approximate location of the John wayne Airport noise contours for
1990 based on measurements obtained at monitoring station M7 throughout the year.
Referring to the figure, the community noise equivalent level (CNEL) ranged from 53 to
59 dB in the City. of Tustin, with a CNEL of about 55 dB at station M7.
Based on data through the first quarter, the annual average CNEL at station M7 will be
57 dB in 1993. The existing and future Phase 2 contours (based on 1993 data) are
provided in Figure 4. Referring to the figure, it is estimated that in 1993 the aircraft-
generated CNEL will range from 55 to 61 dB. This is well below the City, County, and
State criteria of 65 dB for residential areas. --
USE OF QUIETER AIRCRAFT AT JWA
As requested, we have analyzed the correlation between the increasing use of quieter
aircraft at JWA and the change in CNEL within the City of Tustin. The Federal Aviation
Administration (FAA) classifies.aircraft into three categories based on noise levels. In
--
order of decreasing noise levels, there are Stage I, Stage II, and Stage III aircraft. John
Wayne Airport has only permitted Stage III aircraft since the early 1970's.
CITY OF TUb~FIN
2 Project File 2306-91
J.J. VAN HOUTEN & ASSOCIATES, Inc.
The airport has its own classification scheme for passenger aircraft. In order of decreasing
noise level, these are Class A, Class AA, and Class E aircraft. Table 1 provides the
estimated number of each class of aircraft that used the airport between the first quarter
of 1992 and the.first quarter of 1993. Also provided is the measured average quarterly
CNEL at monitoring station M7. Table 2 provides the same information, but the values
have been normalized to.17,000 aircraft operations (takeoffs and landings) per quarter. In
this way, a correlation can be established between the quarterly CNEL and the mix of
aircraft types.
Referring to Table 2 and Figure 5, the percentage of quieter Class E aircraft using John
Wayne Airport ~as higher in the 1st quarter of 1993 than in all of 1992 (about 22%). This
increase in Class E aircraft was offset by decrease in the use of the noisier Class AA
aircraft, Despite this increase in quieter aircraft, the weighted average quarterly CNEL
increased slightly. This may be attributed to variations in the aircraft landing profiles
during the year (e.g., different altitudes at monitoring station M7 or different lateral
distance from the station) or possibly in the landing procedures (e.g., different power
settings).
If you have any questions, please contact the undersigned at 714/978-7018.
Very truly yours.
J. J. VAN HOUTEN & ASSOCIATES, INC.
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CITY OF TUSTIN
3 Project File 2306-91
j.j. VAN HOUTEN & ASSOCIATES, Inc.
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Figure 3. Approximate Location of John Wayne Airport
Noise Contours, 1990
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Approximate Location of John Wayne
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