November 2004 (PDF 11.6 MB) - Barrick Gold Corporation

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Table C3. Procedure for assessing meteorological effects in the Hunter region 1Step1. Determine theexact location ofthe development2. Determine thepercentoccurrence oftemperatureinversions3. Determine themeteorologicalimpact, based onexisting dataProcedureIdentify the International Standard Grid (ISG) map grid coordinates of the area inquestion. Take care to identify the full extent of the area surrounding the developmentthat is likely to be affected.From Table F1 in Appendix F, read the percentage occurrence of F-class temperatureinversions corresponding to the map coordinates that cover the full extent of the area.If the frequency of temperature inversions is less than 30 per cent at this location, theseeffects are not considered significant and no additional noise predictions are needed.If temperature inversions occur for 30 per cent of the total night-time or more oftenduring the winter months, adopt the following default value to predict noise impact:F-class inversions• inversion: 3°C/100 m• source-to-receiver drainage-wind speed where applicable 2 :2 m/s at 10 m heightApply these inversion parameters to the noise prediction and determine the increasednoise level.Compare the final predicted level with the project-specific noise levels to assess thenoise impact.If the default temperature-inversion and wind-drift parameters are not acceptable to thedeveloper, then the actual temperature inversion and wind speed may be measured asin Alternative 2, Table C2.Note:1. The proponent may elect to determine inversion frequency and strength through one of the four methods setout in Table C4. If a significant incidence of G-class inversions is established, then the default values forG-class inversions (set out in Table C2) should be applied.2. The drainage-flow-wind default value should generally be applied where a development is at a higher altitudethan a residential receiver, with no intervening higher ground (for example, hills).Table C4. Methods for determining the strength and frequency of temperatureinversionsFeaturesExisting/simple data methodsDirect measurementPasquill-GiffordschemeTurner scheme Sigma-theta method Temperature lapse rateType ofmonitoring/parametersrequiredHourly or threehourlycloud cover,hourly or threehourlyaverage windspeed at 10 mheight.Hourly or three-hourlycloud cover, cloudceilingheight, hourlyor three-hourlyaverage wind speedand direction at 10 mheight.Time of day, windspeed and direction,sigma-theta, surfaceroughness/ vegetationcover.Lapse rate, hourlytemperature at heightintervals of 10 to 60 m.(For all the above, see Appendix E for full method.)Length ofmonitoringMonitoringlocationAssessmenttime periodCollect three months' data continuously during winter for night-time (6 pm to 7 am).Collect weather data at minimum height of 10 m. Available weather data may be used to representweather conditions within a radius of 30 km from the measurement point in the same topographicalbasin; otherwise data needs to be collected as it is terrain-dependent.Night (2200 to 0700 h)NSW industrial noise policy76
Appendix D Estimating noise increase due toinversionsTable D1 may be used as a rough guide for predictinginversion effects at a site at the initial screeningtest stage.as a result of the inversion. The levels are based oncalculations performed using ENM ver. 3.06, assuminga simple flat ground and no barrier model.The table gives an estimate of the decibel differencein noise levels predicted with and without inversionconditions representing an increase in noise levelsTable D1. Increase in noise level due to inversionsDistance(m)3°C/100 m3°C/100 m and2 m/sIncrease in noise level, dB8°C/100 m8°C/100 m and 1 m/s100 1.0 2.0 2.0 3.0200 1.0 3.0 3.0 4.0300 1.0 3.0 3.0 4.0400 1.5 3.5 3.5 5.0500 1.5 4.0 4.0 5.5600 1.5 4.5 4.5 6.5700 1.5 5.0 5.0 6.5800 1.5 5.0 5.0 6.5900 1.5 5.0 5.0 6.51000 1.5 5.0 5.0 6.51500 1.5 4.5 5.0 6.52000 1.5 4.5 5.0 6.52500 1.5 4.5 4.5 6.53000 1.5 4.5 4.5 6.04000 1.5 4.0 4.0 6.05000 1.0 4.0 4.0 5.5Notes:The above data represent the results of single-point source calculations performed using ENM ver. 3.06 assuming abroadband noise source rounded-off to the nearest 0.5 dB. The following parameters were adopted in thecalculations:• temperature 12°C (winter), humidity 85%• wind direction from source to receiver (270°)• source height 3 m, receiver height 2 m• rural, ground type: grass, rough pasture.NSW industrial noise policy77
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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
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
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: The sections below outline the proc
Page 127 and 128: Table E2. Step procedure for determ
Page 129 and 130: • hourly or three-hourly cloud ce
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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