in tunnel air quality monitoring - report 6 - october …...air quality report: in tunnel air...
TRANSCRIPT
Air Quality Report: In Tunnel Air Quality Monitoring, October 2012 1 of 11
M5 East Freeway
Air Quality Report: In Tunnel Air Quality Monitoring
Report 6
October 2012
Air Quality Report: In Tunnel Air Quality Monitoring, October 2012 2 of 11
Document change control
Revision history
Version Issue date Updated by Comments
001 01/11/12 JC
002
003
References
Document name Version Abbreviation
Air Quality Report: In Tunnel Air Quality Monitoring, October 2012 3 of 11
Summary • CCTV was used to monitor conditions within the tunnels and jet fans were used to increase ventilation to ensure tunnel
conditions remained within specified limits. • AQS305 was undergoing maintenance due to misreading from the 17th to the 29th October 2012.
Air Quality Report: In Tunnel Air Quality Monitoring, October 2012 4 of 11
Preamble
Air Quality Report: In-Tunnel Air Quality Monitoring This report shows the carbon monoxide and visibility levels in the M5 East Tunnel (Main Tunnel) and the Cooks River Tunnel (CRX Tunnel).
Carbon Monoxide Carbon monoxide (CO) is monitored in the tunnel because exposure to high levels is harmful to peoples health. The limits in the tunnel are
based on World Health Organisation guidelines for short term exposure to CO. The limit for CO in the tunnel is 87 parts per million for 15
minutes and this is a requirement in the Ministers Conditions of Approval for the tunnel. The level of CO in the tunnel is continually measured
and the ventilation system is adjusted to reduce the concentration of CO below the required levels.
Visibility Visibility is measured in the tunnel because poor visibility can make driving conditions dangerous. Reduced visibility or haze in the tunnel is
mainly caused by smoky vehicles, usually diesel trucks. Visibility limits used in the tunnel are taken from the World Road Association guidelines
which recommend the tunnel is closed if the visibility reaches 0.012/m.
15 minute time weighted average This refers to the CO or visibility readings averaged over a 15 minute period with this reading being updated every 15 minutes.
Air Quality Report: In Tunnel Air Quality Monitoring, October 2012 5 of 11
Main Tunnel Ventilation System
ACO604
ACO403
AQS403
AQS404 AQS301
ACO301
ACO302
AQS302
Air Quality Report: In Tunnel Air Quality Monitoring, October 2012 6 of 11
0
10
20
30
40
50
60
70
80
90
100
pp
m
Main Tunnel Westbound
CO Level (15min Time Weighted Average)
CO Limit ACO403 Mainline W/B at Eastern Crossover ACO604 Marsh St entry ramp
AQS403 Mainline W/B (before exhaust tunnel) AQS404 Mainline W/B (before western X-over)
Air Quality Report: In Tunnel Air Quality Monitoring, October 2012 7 of 11
0
10
20
30
40
50
60
70
80
90
100p
pm
Main Tunnel Eastbound
CO Level (15min Time Weighted Average)
AQS301 Mainline E/B (before exhaust tunnel) ACO301 Mainline E/B (before Princes Hwy exit) ACO302 Mainline E/B (before Marsh St exit)
AQS302 Mainline E/B (before E X-over) CO Limit
Air Quality Report: In Tunnel Air Quality Monitoring, October 2012 8 of 11
0
10
20
30
40
50
60
70
80
90
100
pp
m
CRX Tunnel
CO Level (15min Time Weighted Average)
AQS305 CRX E/B exit portal AQS406 CRX W/B exit portal CO Limit
Air Quality Report: In Tunnel Air Quality Monitoring, October 2012 9 of 11
0
0.001
0.002
0.003
0.004
0.005
0.006
0.007
0.008
0.009
0.01
un
its/
mMain Tunnel Westbound
Visibility (15min Time Weighted Average)
AQS403 Mainline W/B (before exhaust tunnel) AQS404 Mainline W/B (before Western X-over) Normal Normal Congested Heavy Congestion
Air Quality Report: In Tunnel Air Quality Monitoring, October 2012 10 of 11
0
0.001
0.002
0.003
0.004
0.005
0.006
0.007
0.008
0.009
0.01
un
its/
m
Main Tunnel Eastbound
Visibility (15min Time Weighted Average)
AQS301 Mainline E/B (before exhaust tunnel) AQS302 Mainline E/B (before E X-over) Normal Congested Heavy Congestion
Air Quality Report: In Tunnel Air Quality Monitoring, October 2012 11 of 11
0
0.001
0.002
0.003
0.004
0.005
0.006
0.007
0.008
0.009
0.01
un
its/
mCRX Tunnel
Visibility (15min Time Weighted Average)
AQS305 CRX E/B Exit portal AQS406 CRX W/B Exit portal Normal Congested Heavy Congestion