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APPENDIX I: Noise Monitoring Data - Xstrata Coal Mangoola

APPENDIX I: Noise Monitoring Data - Xstrata Coal Mangoola

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5.1.14 A4, 5 July 2012, Night<br />

Environmental <strong>Noise</strong> Levels At A4 - Yarraman Road<br />

05 Jul 2012, 2229 hours<br />

TotalLA1 TotalLA10 TotalLAeq TotalLA90 LA1 LA10 LAeq LA90<br />

70<br />

65<br />

dB(A)<br />

60<br />

55<br />

50<br />

45<br />

40<br />

Measured <strong>Noise</strong> Levels<br />

LA1: 29 dB<br />

LA10: 27 dB<br />

LAeq: 26 dB<br />

LA90: 24 dB<br />

<strong>Mangoola</strong> <strong>Coal</strong> <strong>Noise</strong><br />

Levels<br />

LA1,1min: 32 dB<br />

LAeq: 25 dB<br />

35<br />

30<br />

<strong>Mangoola</strong> <strong>Coal</strong> continuum<br />

and rear dump trucks<br />

Dog<br />

All statistics are 15min<br />

unless noted otherwise<br />

in report<br />

25<br />

20<br />

12.5<br />

16<br />

20<br />

25<br />

31.5<br />

40<br />

50<br />

63<br />

80<br />

100<br />

125<br />

160<br />

200<br />

250<br />

315<br />

400<br />

500<br />

630<br />

800<br />

1000<br />

1250<br />

1600<br />

2000<br />

2500<br />

3150<br />

4000<br />

5000<br />

6300<br />

8000<br />

10000<br />

Total<br />

Frequency (Hz)<br />

Figure 16<br />

Environmental <strong>Noise</strong> Levels, A4 – Yarraman Road<br />

Continuum from <strong>Mangoola</strong> <strong>Coal</strong> was audible throughout the measurement. Track noise,<br />

impact noise, transmission noise, reverse alarms, horns and a two toned alarm were also<br />

audible. These sources resulted in a <strong>Mangoola</strong> <strong>Coal</strong> only L Aeq of 25 dB. A surge in the<br />

continuum generated the <strong>Mangoola</strong> <strong>Coal</strong> only L A1,1min of 32 dB.<br />

<strong>Mangoola</strong> <strong>Coal</strong> was largely responsible for the measured levels. Dogs contributed to the<br />

measured L A1 .<br />

Frogs, birds and road traffic tyre noise were also noted.<br />

34<br />

12324_R01.doc<br />

Page 34

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