November 2004 (PDF 11.6 MB) - Barrick Gold Corporation

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Table E5. Wind flucuation criteria forestimating Pasquill-Giffordstability categories for nonaridareas in NSW 1,2PasquillstabilitycategoryAStandard deviation of thehorizontal wind directionfluctuations 3,4(σ Ain degrees)σ A≥ 22.5 oTable E6. Night-time 1 Pasquill-Giffordstability categories based on σ Afrom Table E5If the σ Astabilitycategory is:And the windspeed at 10 mis (m/s):A < 2.92.9–3.6Then thePasquillstabilitycategory is:FEB17.5 o ≤ σ A
Table E7. Aerodynamic roughness of various surfacesSurface Comments Roughness (z o) (m)Water Still, open sea 0.1–10.0x10 -5Sand, open desert 0.0003Open soil 0.001–0.01GrassShort scrub, long grass and mostfield cropsMown lawn: 0.02–0.10 mRough pasture: 0.25–1.0 m0.003–0.010.04–0.100.05–0.10Forest 0.6–2Suburban area 0.6City 0.6–2E5DiscussionIn summary, the above discussion outlines threeindependent ways that readily-available or easilycollectedmeteorological data can be analysed toestimate the frequency with which atmosphericstability categories of different classes occur.It is envisaged that consultants assessing thesusceptibility of an area to inversions would eitheraccept the default meteorological parameters, orundertake their own analyses using one of theschemes outlined above.Where the default meteorological parameters are tobe replaced by the consultant’s own assessment,then any one of the above schemes could be used.However, in order of preference, the schemes are:E6Default values for the prediction ofnoise impactsOnce the percentage occurrence of stability categorieshas been determined from one of the methodsdescribed above, it is necessary to determinewhether the Pasquill Stability Category occurs for ≥30 per cent of the time during the night-time inwinter, signifying the need for further assessment.Table E8 details the default values (temperaturegradient and wind speed) to be used for the predictionof impacts where further assessment is required.1. Direct measurements of temperature gradientover a height interval of at least 50 m, withsimultaneous measurements of wind speedand wind direction at two heights.2. The sigma-theta method.3. The Pasquill-Gifford scheme and Turnerscheme (equally preferred).Other methods are detailed in the US EPA’s document(1987), On-Site Meteorological Program Guidancefor Regulating Modelling Applications.NSW industrial noise policy83
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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
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activities, they also increase envi
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Table 3.1. Methods for determining
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Table 3.2. Determining the existing
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ambient noise levels can affect the
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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
Page 89 and 90: 3. Control in transmission—the ne
Page 91 and 92: 8 Negotiation process8.1 The proces
Page 93 and 94: Features of a negotiated agreementp
Page 95 and 96: 9 Consent/licence conditionsThe pro
Page 97 and 98: 10 Applying the policy to existingi
Page 99 and 100: 11 Reviewing performanceMonitoring
Page 101 and 102: • the noise instrumentation used.
Page 103 and 104: ReferencesBerglund B. & Lindvall T.
Page 105 and 106: activities may include construction
Page 107 and 108: Spectral characteristics: The frequ
Page 109 and 110: Table A1. Assessment steps1. Do a p
Page 111 and 112: In this case, the amenity criterion
Page 113 and 114: any assessment period in any season
Page 115 and 116: In this case the intrusive criterio
Page 117 and 118: able to show that the wind-induced
Page 119 and 120: Take the background noise measureme
Page 121 and 122: Appendix C Procedure for assessing
Page 123 and 124: The sections below outline the proc
Page 125 and 126: Appendix D Estimating noise increas
Page 127 and 128: Table E2. Step procedure for determ
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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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