APPENDIX I: Noise Monitoring Data - Xstrata Coal Mangoola
APPENDIX I: Noise Monitoring Data - Xstrata Coal Mangoola
APPENDIX I: Noise Monitoring Data - Xstrata Coal Mangoola
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3 METHODOLOGY<br />
3.1 Attended <strong>Noise</strong> <strong>Monitoring</strong><br />
Attended monitoring was conducted in accordance with OEH ‘Industrial <strong>Noise</strong> Policy’ (INP)<br />
guidelines and Australian Standard AS 1055 ‘Acoustics, Description and Measurement of<br />
Environmental <strong>Noise</strong>’. Atmospheric condition measurement was also undertaken. The<br />
duration of each measurement was 15 minutes.<br />
Attended monitoring is preferred to the use of noise loggers when determining compliance<br />
with prescribed limits; it allows an accurate determination of the contribution, if any, to<br />
measured noise levels by the source of interest (in this case <strong>Mangoola</strong> <strong>Coal</strong>).<br />
The equipment detailed in Table 3.1 was used to measure environmental noise levels.<br />
Table 3.1 ATTENDED NOISE MONITORING EQUIPMENT<br />
Model Serial Number Calibration Due Date<br />
Rion NA-28 sound level analyser 370304 10/05/2013<br />
Rion NA-28 sound level analyser 701424 27/04/2013<br />
Larson Davis 150 Calibrator 3333 25/07/2014<br />
Rion NC-73 Calibrator 11248306 09/02/2014<br />
Calibration certificates are provided in Appendix B.<br />
Meteorological data was obtained from <strong>Mangoola</strong> <strong>Coal</strong> meteorological stations. This allowed<br />
correlation of atmospheric parameters and measured noise levels. Sigma theta is used to<br />
calculate vertical temperature gradient (VTG) in accordance with procedures detailed in the<br />
INP.<br />
Met data used in this report was sourced from <strong>Mangoola</strong> <strong>Coal</strong>’s north and south<br />
meteorological stations and is provided in Appendix C.<br />
<strong>Data</strong> from the southern meteorological station appeared to contain errors during the day<br />
period of 4 July 2012, so all meteorological data for the day period was sourced from the<br />
northern meteorological station only for this day.<br />
As indicated in the notes below Condition 3, Schedule 3 of the project approval, modifying<br />
factors from Section 4 of the INP should be implemented where applicable. Tonality and low<br />
frequency from <strong>Mangoola</strong> <strong>Coal</strong> were assessed by analysis of the measured L Aeq spectrum.<br />
Years of monitoring have indicated that noise levels from mining operations, particularly<br />
those levels measured at significant distances from the source are relatively continuous.<br />
Given this, noise levels from <strong>Mangoola</strong> <strong>Coal</strong> at the monitoring locations are unlikely to be<br />
intermittent. In addition, there is no equipment on site at <strong>Mangoola</strong> <strong>Coal</strong> that would generate<br />
impulsive noise as defined in the INP. However, low frequency noise from <strong>Mangoola</strong> <strong>Coal</strong><br />
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