HomeMy WebLinkAbout06 J.W. NOISE ABATE 06-03-96NO. 6
6-~-96
DATE:
JUNE 3, 1996'
Inter-Com
TO: WILLIAM A. HUSTON, CITY MANAGER
FROM: COMMUNITY DEVELOPMENT DEPARTMENT
SUBJECT: JOHN WAYNE AIRPORT NOISE ABATEMENT QUARTERLY REPORTS
RECOMMENDATION
Receive and file report.
FISCAL IMPACT
The City retains the acoustics consulting firm of J.J. Van Houten
and Associates, Inc. for review of noise-related items. The costs
for such reviews are annually included in the Community Development
Department budget.
DISCUSSION
The Community Development Department currently contracts with an
acoustics consultant to review and interpret the John Wayne Airport
Noise Abatement Program Quarterly Reports prepared by the County of
Orange. On September 21, 1987, the City Council authorized these
reviews to monitor airport noise issues as a result of concerns
from many Tustin residents. Twice a year, the consultant prepares
a report which summarizes two quarterly reports.
Attachment 1 contains the quarterly reports for the third quarter
of 1995 (July 1, 1995 - September 30, 1995) and the fourth quarter
of 1995 (October 1, 1995 - December 31, 1995). Attachment 2
contains the summary report prepared by the noise consultant. A
brief overview 'of the information contained within these
attachments follows.
John Wayne Airport Quarterly Noise Abatement Reports
June 3, 1996
Page 2
Measured Noise Levels
During the third quarter of 1995, the average CNEL at
Remote Monitoring Station (RMS) #7, located at Columbus
Tustin Middle School, was 55.7 dB. Comparison data for
the same period during 1994 is not available since RMS #7
was not operational during the first three quarters of
1994.
During the fourth quarter of 1995, the average CNEL was
57.4 compared with 56.1 for the same period during 1994.
The average annual CNEL of 56.4 for 1995 was 0.3 dB
higher than the average annual CNEL of 56.1 dB for 1994.
Ail measured noise levels are below the City, County and
State criteria of 65 dB CNEL for residential areas.
Noise Complaints
'During the third quarter of 1995, there were 46
Tustin/Orange complaints compared with 70 for the same
period during 1994.
During the fourth quarter of 1995, there were 47
Tustin/Orange complaints compared with 39 for the same
period during 1994.
While complaints have increased slightly each quarter
since the fourth quarter of 1994, jet operations have
varied widely. There does not appear to be a correlation
between the number of complaints and the number o~ jet
operations during each quarter.
Type and Mix of Aircraft Related to Noise Levels
During the third quarter of 1995, the use of quieter
Class E aircraft decreased and the use of noisier Class
A aircraft slightly increased. During this time, the
average quarterly CNEL slightly decreased.
During the fourth quarter of 1995, the use of quieter
Class E aircraft increased and the use of noisier Class
A aircraft slightly decreased. During this.time, the
average quarterly CNEL slightly increased.
No clear correlation between CNEL and the type and mix of
arriving and departing aircraft can be determined from
information in these reports or previous reports.
John Wayne Airport Quarterly Noise Abatement Reports
June 3, 1996
Page 3
Since noise issues are of considerable importance to the City of
'Tustin, the Community Development Department will continue to
monitor operations at John Wayne Airport unless otherwise directed
by the City Council.
Karen Sicoli
Assistant Planner
Community Development Director
Attachments
.
John Wayne Airport Noise Abatement Quarterly Reports for July
1, 1995 - September 30, 1995 and October 1, 1995 - December
31, 1995.
.
Review of John Wayne Airport Noise Abatement Program Quarterly
Reports, 3rd and 4th Quarters 1995 (Van Houten and Associates,
Inc.)
KS: jwa6-3, doc