HomeMy WebLinkAbout15 - JWA Settlement Agreement & Noise LimitsMarch 22, 1999
Agenda Item No. 15
• CITY OF NEWPORT BEACH
OFFICE OF THE CITY COUNCIL
March 22, 1999
TO: Mayor & Members of the City Council
FROM: Council Member Glover, Aviation Committee Chair
Council Member Gary Adams, Aviation Committee Vice -Chair
RE: Recommendations of Aviation Committee
Proposed Amendments to the JWA Settlement Agreement
Modifications to Departure Noise Limits
Replacement of Noise Monitoring System
BACKGROUND
In 1979, the County of Orange installed monitors to measure the departure and arrival
noise generated by commercial jet aircraft and, more recently, certain general aviation
• aircraft. Data from these monitors was utilized in establishing the noise thresholds in the
John Wayne Airport Settlement Agreement (Settlement Agreement). The Settlement
Agreement established three aircraft classifications based on the amount of noise
generated by commercial jets on departure. The noise thresholds have been modified
from time to time to reflect the relocation of monitors and FAA mandated changes in
noise abatement departure procedures. The modifications to the noise threshold have
been designed to avoid any enhancement in the operational capacity of JWA.
DISCUSSION
The Aviation Committee has received two presentations from the County regarding the
installation of a new noise monitoring system to replace the existing equipment (now
more than twenty years old). In 1998, the County advised the Aviation Committee of the
purchase of the new, state of the art, noise monitors and the advantages of this
equipment. The new monitoring system will enable the County to record and analyze
aircraft noise data more quickly through an interface with new computer equipment. The
new monitors can record up to thirty (30) days of noise data in the event of a power or
computer failure.
As promised, in 1998, the County installed the new monitors next to the existing
equipment and, for the last year, has taken noise data from both microphones. The noise
• data includes thousands of measurements of each aircraft type at each departure
monitoring station. Mestre Greve & Associates, a Newport Beach firm recognized as
experts in aviation noise analysis, conducted the test and evaluated the data collected. •
They have recommended increases in the noise limits for some or all of the three aircraft
classes at each of the seven departure monitoring stations (See Exhibits A & B). The
Aviation Committee and staff are confident that these increases will not increase the
operational capacity of JWA or any of the aircraft in the fleet.
RECOMMENDATION
The Aviation Committee is recommending the City Council authorize the Mayor to
execute amendments to the Settlement Agreement modifying the departure noise
thresholds consistent with Exhibit A.
�n'-Yn-ti �� (P'W a')
NORMA GLOVER
Aviation Committee Chair
GARY ADAMS
Aviation Committee Vice Chair
2 0
•
•
•
Exhibit A
E
John Wayne Airport
Side -By -Side Noise Level Comparison Results
Adjustments to the Maximum Permitted Noise Limits Based on Comparing One -Year of Data From
[Existing] Current and New Aircraft Operations and Noise Monitoring Systems
Noise Limit Current Noise Limit
Revise Noise Limit
NMS
Noise Class Adjustment (dB) (dB SENEL)
(dB SENEL)
1
A
0.3 101.5
101.8
1
AA
0.9 94
94.9
1
E
1 92.5
93.5
2
A
0.1 101
101.1
2
AA
0.6 94
94.6
2
E
0.5 92.5
93
3
A
0.2 100.5
100.7
3
AA
0.7 91
91.7
3
E
0.7 89
89.7
21
A
1.1 93.5
94.6
21
AA
0 89.5
89.5
21
E
0.6 86
86.6
22
A
0.6 93.5
94.1
22
AA
0 89.5
89.5
22
E
0 86
86
24
A
0.6 95.5
96.1
24
AA
0 89.5
89.5
24
E
0.6 86
86.6
6
A
1 92
93
6
AA
0 89.5
89.5
6
E
0 86
86
E
Exhibit B
JOHN WAYNE AIRPORT
STATION LOCATION MAP
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