November 2004 (PDF 11.6 MB) - Barrick Gold Corporation

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B3.2 Short-term method• details of equipment used (include latestcalibration date), equipment settings and thesampling rate of the meter• a statement justifying the choice ofmonitoring site and period, including theprocedure used to choose the site, havingregard to the definitions of ‘noise- sensitivelocation(s)’ and ‘most-affected location(s)’described in Section 3.1.2• a description of the dominant andbackground noise sources at the site• a record of weather conditions duringmonitoring• the measured background noise levels.NSW industrial noise policy72
Appendix C Procedure for assessing noise increasedue to temperature inversionsC1IntroductionThe procedure for assessing the increase in noisecaused by temperature inversions involves thefollowing main steps:• Do an initial screening test to determinewhether there is the potential for increasednoise levels due to inversions, and whetherfurther detailed analyses are warranted.• Determine the extent of impact. Where thereis the potential for inversions to increasenoise levels, the actual extent of impact (interms of percent occurrence of inversions) forthe locality being assessed is to bedetermined. Where inversions are predictedfor more than 30 per cent of the total nighttimeduring winter, these are considered to besignificant and should be taken account of inthe noise assessment.• Predict the level of noise using default oralternative parameters to determine theincrease in noise levels expected due toinversions. Default inversion parameters arespecified to avoid the need for potentiallycostly on-site monitoring, but, if preferred,other values based on direct measurementsmay be used.• Assess the impact to determine whether theincreased noise levels due to inversions willaffect receivers in the vicinity of thedevelopment. The predicted increased noiselevels are compared with the project-specificnoise levels to determine if any exceedances(and hence noise impacts) are expected.Table C1. Initial screening test proceduresTest1. Night-timeoperation2. Test formaximumpossible levelof impactProcedureDetermine whether the development in question operates at night (2200 to 0700).If the development operates at night, do screening test 2 to determine the potential forimpact.If the development does not operate at night, there is no potential for noise impact dueto inversions, and no further consideration of these effects is required.Do a noise-prediction assessment, assuming the following meteorological conditions torepresent the upper level of impacts:Non-arid areas (average annual rainfall 500 mm or more)• temperature inversion strength: 3°C/100 m• source-to-receiver drainage-wind speed where applicable 1 : 2 m/s at 10 m heightArid and semi-arid areas (average annual rainfall less than 500 mm)• temperature inversion strength: 8°C/100 m• source-to-receiver drainage-wind speed where applicable 1 : 1 m/s at 10 m heightIf the predicted noise levels show an increase of less than 3 dB, meteorological effectsare not considered to be an issue and no further consideration of these effects isrequired.If a greater than 3 dB increase is predicted, meteorological effects are an issue andfurther work is needed to determine the meteorological conditions applicable to the sitein question. (See Table C2.)(Table D1 in Appendix D may be used as a guide to predicting the effect ofinversions for this Step.)Note:1. The drainage-flow wind default value should generally be applied where a development is at a higheraltitude than a residential receiver, with no intervening higher ground (for example, hills).NSW industrial noise policy73
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Cowal Gold ProjectNoiseManagement P
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Cowal Gold Project - Noise Manageme
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For technical information about thi
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1 Policy framework1.1 Overview of t
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2. Measuring and determining existi
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Assessing intrusivenessFor assessin
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industry were sufficient to alter t
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Figure 1.2.The overall process of a
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Figure 1.4.Predicting source noise
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Figure 1.6.Negotiation process and
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has shown that it is a reasonable a
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Table 2.2. Modification to acceptab
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egory for the amenity criteria will
Page 69 and 70: activities, they also increase envi
Page 71 and 72: Table 3.1. Methods for determining
Page 73 and 74: Table 3.2. Determining the existing
Page 75 and 76: ambient noise levels can affect the
Page 77 and 78: Table 4.1.Modifying factor correcti
Page 79 and 80: 5 Meteorological conditions5.1 Intr
Page 81 and 82: which is from 10 pm to 7 am.) Winte
Page 83 and 84: around structures. At higher wind s
Page 85 and 86: eing used for a particular project.
Page 87 and 88: • employing ‘quiet’ practices
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Page 91 and 92: 8 Negotiation process8.1 The proces
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Page 103 and 104: ReferencesBerglund B. & Lindvall T.
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Page 107 and 108: Spectral characteristics: The frequ
Page 109 and 110: Table A1. Assessment steps1. Do a p
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Page 125 and 126: Appendix D Estimating noise increas
Page 127 and 128: Table E2. Step procedure for determ
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Page 131 and 132: Table E7. Aerodynamic roughness of
Page 133 and 134: Appendix FPercentage occurrence of
Page 135 and 136: 282000 1354000 20-25284000 1354000
Page 137 and 138: 394000 1362000 45-50256000 1364000
Page 139 and 140: 366000 1372000 45-50368000 1372000
Page 141 and 142: 338000 1382000 25-30340000 1382000
Page 143 and 144: 310000 1392000 20-25312000 1392000
Page 145 and 146: 282000 1402000 25-30284000 1402000
Page 147 and 148: 394000 1410000 20-25256000 1412000
Page 149 and 150: 366000 1420000 20-25368000 1420000
Page 151 and 152: 338000 1430000 15-20340000 1430000
Page 153 and 154: 310000 1440000 20-25312000 1440000
Page 155 and 156: 282000 1450000 20-25284000 1450000
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November 2004 (PDF 11.6 MB) - Barrick Gold Corporation

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