November 2004 (PDF 11.6 MB) - Barrick Gold Corporation

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Definitions of termsAcceptable noise level: See the fourth column ofTable 2.1.A-weighted: See dB(A).Adverse weather: Weather effects that enhancenoise (that is, wind and temperature inversions)that occur at a site for a significantperiod of time (that is, wind occuring morethan 30% of the time in any assessmentperiod in any season and/or temperatureinversions occuring more than 30% of thenights in winter).Ambient noise: The all-encompassing noiseassociated within a given environment. It isthe composite of sounds from many sources,both near and far.Amenity criteria: See Tables 2.1 and 2.2.Assessment period: The period in a day overwhich assessments are made: day (0700 to1800 h), evening (1800 to 2200 h) or night(2200 to 0700 h).Assessment background level (ABL): The singlefigurebackground level representing eachassessment period—day, evening and night(that is, three assessment background levelsare determined for each 24-h period of themonitoring period). Its determination is bythe tenth percentile method described inAppendix B.Background noise: The underlying level of noisepresent in the ambient noise, excluding thenoise source under investigation, whenextraneous noise is removed. This is describedusing the L A90descriptor.Breach: Failure to address and rectify sustainednon-compliance will place a development inbreach of its noise consent/licence condition.C-weighted: C-weighting is an adjustment made tosound-level measurements which takesaccount of low-frequency components ofnoise within the audibility range of humans.Cognitive noise: Noise in which the source isrecognised as being annoying.Community annoyance: Includes noise annoyancedue to:—characteristics of the noise (for example,sound pressure level, tonality, impulsiveness,low-frequency content)—characteristics of the environment (forexample, very quiet suburban, suburban,urban, near industry)—miscellaneous circumstances (for example,noise avoidance possibilities, cognitivenoise, unpleasant associations)—human activity being interrupted (sleep,communicating, reading, working, listeningto radio/TV, recreation).Compliance: The process of checking that sourcenoise levels meet with the noise limits in astatutory context.Construction activities: Activities that are related tothe establishment phase of a developmentand that will occur on a site for only a limitedperiod of time.Cumulative noise level: The total level of noisefrom all sources.Day: The period from 0700 and 1800 h (Monday toSaturday) and 0800 to 1800 h (Sundays andPublic Holidays).dB: Abbreviation for decibel—a unit of soundmeasurement. It is equivalent to 10 times thelogarithm (to base 10) of the ratio of a givensound pressure to a reference pressure.dB(A): Unit used to measure ‘A-weighted’ soundpressure levels. A-weighting is an adjustmentmade to sound-level measurement to approximatethe response of the human ear.Default parameters: In assessing meteorologicalenhancement of noise, refers to set values forweather parameters, such as wind speedsand temperature gradients, to be used inpredicting source noise levels.Equivalent continuous noise level: The level ofnoise equivalent to the energy average ofnoise levels occurring over a measurementperiod.Evening: The period from 1800 to 2200 h.Extraneous noise: Noise resulting from activitiesthat are not typical of the area. AtypicalNSW industrial noise policy56
activities may include construction, andtraffic generated by holiday periods and byspecial events such as concerts or sportingevents. Normal daily traffic is not consideredto be extraneous.Feasible and reasonable measures: Feasibilityrelates to engineering considerations andwhat is practical to build; reasonablenessrelates to the application of judgement inarriving at a decision, taking into account thefollowing factors:—noise mitigation benefits (amount of noisereduction provided, number of peopleprotected)—cost of mitigation (cost of mitigation versusbenefit provided)—community views (aesthetic impacts andcommunity wishes)—noise levels for affected land uses (existingand future levels, and changes in noiselevels).Greenfield site: Undeveloped land.High traffic criterion: See Section 2.2.3.Impulsive noise: Noise with a high peak of shortduration, or a sequence of such peaks.Industrial noise sources: Sources that do notgenerally move from place to place, forexample, stationary sources. Except whereother more specific guidelines apply (forexample, construction activities, road or railtraffic, emergency diesel generators etc), allindustrial noise sources that are scheduledunder the Protection of the Environment OperationsAct 1997 are considered to be industrialsources. In general, these include:• individual industrial sources such as:—heating, ventilating and air conditioning(HVAC) equipment—rotating machinery—impacting mechanical sources—other mechanical equipment and machinerysuch as conveyors—mobile sources confined to a particularlocation, such as draglines and haultrucks.• facilities, usually comprising many sourcesof sound,including:—industrial premises—extractive industries—commercial premises—warehousing facilities—maintenance and repair facilities.(In this case, the industrial source isunderstood to encompass all the activitiestaking place within the property boundaryof the facility.)Intrusive noise: Refers to noise that intrudes abovethe background level by more than 5 decibels.The intrusiveness criterion is set out inSection 2.1.L A90: The A-weighted sound pressure level that isexceeded for 90 per cent of the time overwhich a given sound is measured. This isconsidered to represent the backgroundnoise.L Aeq: The equivalent continuous noise level—thelevel of noise equivalent to the energyaverageof noise levels occurring over ameasurement period.Low frequency: Noise containing major componentsin the low-frequency range (20 Hz to250 Hz) of the frequency spectrum.Masking: The phenomenon of one sound interferingwith the perception of another sound. Forexample, the interference of traffic noise withuse of a public telephone on a busy street(Bies & Hansen 1996).Maximum noise level: See the fifth column of Table2.1.Median: The middle value in a number of valuessorted in ascending or descending order.Hence, for an odd number of values, thevalue of the median is simply the middlevalue. If there is an even number of values themedian is the arithmetic average of the twomiddle values.Meteorological conditions: Wind and temperatureinversionconditions.NSW industrial noise policy57
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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
Page 53 and 54: Assessing intrusivenessFor assessin
Page 55 and 56: industry were sufficient to alter t
Page 57 and 58: Figure 1.2.The overall process of a
Page 59 and 60: Figure 1.4.Predicting source noise
Page 61 and 62: Figure 1.6.Negotiation process and
Page 63 and 64: has shown that it is a reasonable a
Page 65 and 66: Table 2.2. Modification to acceptab
Page 67 and 68: 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
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: ReferencesBerglund B. & Lindvall T.
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
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
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282000 1450000 20-25284000 1450000
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November 2004 (PDF 11.6 MB) - Barrick Gold Corporation

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