APPENDIX I: Noise Monitoring Data - Xstrata Coal Mangoola

Table 4.7 MEASURED L Ceq,15 minute NOISE LEVELS AGAINST LOW FREQUENCY NOISE CRITERIA, BRONER METHOD - QUARTER 3
2012
Location
Date and Time
XMC
only
L Aeq dB 1
L ceq
(less than 250 Hz)
Criterion 2
L Ceq
(less than 250 Hz)
dB 3,4
Comments
Exceedance
A4 – Yarraman Rd 04/07/2012 08:09 29 65 44
XMC, road traffic,
cows and dogs
A5 – Roxburgh Rd 11/07/2012 22:24 32 60 61 XMC Yes
Notes: 1. Mangoola Coal only L Aeq provided as a guide;
2. Day and night L Ceq criterion as detailed in Broner (2010);
3. These are measured C-weighted noise levels (at frequencies less than 250 Hz) and are not always the result of activity
at Mangoola Coal. Guidance on this is provided in the Comments column; and
4. Bolded results in red are those greater than the relevant criterion.
Nil
Table 4.8 provides measured levels and adjustments in accordance with INP modifying
factors. Discussion as to the noise sources responsible for these measured levels is provided
in Section 5 of this report.
Table 4.8 L Aeq(15 min) GENERATED BY MANGOOLA COAL WITH INP MODIFYING FACTORS – QUARTER 3, 2012
Location Date And Time Wind
Speed
(m/s) 1
VTG
( o /C
per
100m) 1
L Aeq
Criterion
dB
Criterion
Applies?
2,3
XMC
L Aeq
dB 4, 5
XMC L Aeq
dB with
Modifying
Factor 5
Exceedance
A5 – Roxburgh Rd 11/07/2012 22:24 0.7 -1.0 37 Y 32 37 Nil
Notes: 1. Wind speed and sigma theta data sourced from Mangoola Coal meteorological stations. Data from the nearest
met station to the monitoring location was used. Sigma theta data used to calculate Vertical Temperature
Gradient (VTG) in accordance with procedures detailed in the INP;
2. Noise emission limits apply for the following meteorological conditions:
• wind speeds of up to 3 m/s at 10 metres above ground level; or
• temperature inversion conditions of up to 3ºC/100m, and wind speeds of up to 2m/s at 10 metres
above ground level;
3. Y denotes Yes, N denotes No;
4. These are results for Mangoola Coal in the absence of all other noise sources; and
5. Bolded results in red are those greater than the relevant criterion.
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