November 2004 (PDF 11.6 MB) - Barrick Gold Corporation

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Cowal Gold Project – Noise Management PlanThe following procedures for operator attended short-term monitoring are predominantly adopted fromSection B2.2 of Appendix B of the INP (Appendix A), which discusses measurement procedures formonitoring of noise levels. Procedures that could be adopted are as follows:1. During the period of the day for which the noise source is expected to operate, determine thetime when the greatest impact is likely to occur and take measurements at this time (Note: this isoften when the difference between the measured existing noise and the noise level generated bythe new or existing development is greatest.).2. Field-calibrate the noise monitoring equipment.3. Measure the noise level continuously for 15 minutes, excluding all distinct extraneous noises.4. Check the field calibration at the end of the monitoring period in accordance with AS 1259.1 (nowsuperseded by AS IEC 61672.1-2004 [Appendix D] and AS IEC 61672.2-2004 [Appendix E]) andAS 2659.1 (Appendix F). Re-monitoring may be required if there is a calibration drift greater thanthat allowed by relevant Australian Standards.Section B1.2 of Appendix B of the INP (Appendix A) describes procedures for unattended long-termmonitoring of noise levels. Procedures that could be adopted are as follows:1. Field-calibrate the noise monitoring equipment.2. Monitor the existing noise and meteorological conditions continuously for each day of the weekthat the proposed development will be operating and over the proposed operating hours, usingthe L A90(15 minute) descriptor.3. Note the dominant and background noise sources present at the site throughout the monitoringperiod.4. Check field calibration at the conclusion of the monitoring period in accordance with AS 1259.1(now superseded by AS IEC 61672.1-2004 [Appendix D] and AS IEC 61672.2-2004 [AppendixE]) and AS 2659.1 (Appendix F) to ensure that any calibration drift is allowed by relevantAustralian Standards.Calibration ChecksCalibration of equipment is described in Section 10 of AS 1259.1 (now superseded by AS IEC61672.1-2004 [Appendix D] and AS IEC 61672.2-2004 [Appendix E]) and Section 3.5 of AS 2659.1(Appendix F). AS 2659.1 provides a general discussion of calibration whilst AS 1259.1 (nowsuperseded by AS IEC 61672.1-2004 [Appendix D] and AS IEC 61672.2-2004 [Appendix E]) providesmore specific detail on how calibration should be undertaken. This section outlines checks to beundertaken in situ to determine the validity of calibration performed on the instrument, as outlined inSection 3.5 of AS 2659.1 (Appendix F).The calibration check will be performed in the field by applying an acoustic calibrator, which provides aknown sound pressure level to the sound level, and confirming that a correct indication of thecalibrator’s reference level is obtained on the meter. It may be necessary to trim the gain of the meter(usually a screwdriver adjustment) until a correct meter indication can be obtained.An acoustic calibration check would be performed both before and after each series ofmeasurements. If the series of measurements spans a long period, more frequent checks should beperformed. As stated in Section 5.6 of AS 1055.1 (Appendix C) if the instrumentation system registersa discrepancy equal to or greater than 1 dB between consecutive checks, any measurements in theinterval between the two checks shall be invalid.HAL-02-07/1/NMP01-P/17/11/04 24 BARRICK
Cowal Gold Project – Noise Management Plan7.2.8 Design of any Noise Modelling or Other StudiesNoise ModellingShould the independent investigation process outlined in Consent Condition 11.1 (Section 15) requirenoise modelling or other studies to be conducted, modelling will be undertaken in accordance with therequirements of Section 6.2 of the INP (Appendix A). Requirements of modelling under the INP are asfollows:• computer models developed should take into account noise attenuation due to distance,atmospheric absorption, barriers, effects of intervening ground types and weather conditions;• model(s) should utilise information including source noise levels, location of sources, topographybetween source and receiver and weather conditions;• modelling approaches should be the subject of peer review and should conform with acceptedpractice (for example, Environmental Noise Model (ENM) or Soundplan). Any other approacheswould need to be approved by the EPA prior to use; and• a map should be produced outlining noise levels as noise contours where large numbers ofpeople are likely to be affected by the noise.Any modelling or other investigations undertaken will be in accordance with DEC requirements.Selecting VariationWhere required by the independent investigation process outlined in Consent Condition 11.1(Section 15) discussed above, noise modelling tools will be used that can predict noise emissionsunder variable parameters (eg. weather conditions and distances to noise receiving locations).Meteorological variation will be selected in light of results from the Project meteorological monitoringstation (Section 7.2.3) and monitoring temperature inversions (Section 6.1). Selecting variation toreflect prevailing weather conditions at the Project and also varying distances to residences and/orbird breeding locations for use in the model will be undertaken by relevant personnel conducting themodelling. Results, incorporating relevant variable parameters, would be used to determine whetheremission criteria are being exceeded at residences and/or bird breeding areas.8 MONITORING OF NOISE IMPACTS ON WILDLIFE8.1 MONITORING OF DISTURBANCE OF BIRD BREEDINGIn accordance with Consent Condition 6.4(b), Barrick is required to undertake remedial measures ifnoise demonstrably disturbs bird breeding.In consultation with NPWS (NPWS, pers. comm., 24 June 2003 and 26 June 2003) it has been agreedthat a demonstrable disturbance to bird breeding will involve an adverse change in breeding successparameters such as the number of fledglings that survive to adulthood (given similar environmentalconditions).Survey records (Crome, 1995; Lane, 1989, 1990, 1991abc; EES, 1992-2000; Gell and Peake, 2001;Gell, 2002a, 2002b, 2002c and 2003) indicate that the bird breeding areas occur in wooded andvegetated parts in northern sections of Lake Cowal. The main bird breeding periods at the LakeCowal bird breeding areas are restricted to the months of August, October and January and aresubject to general climatic conditions and lake water levels (EES, 1999a and 1999b).HAL-02-07/1/NMP01-P/17/11/04 25 BARRICK
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Page 49 and 50: 1 Policy framework1.1 Overview of t
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which is from 10 pm to 7 am.) Winte
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around structures. At higher wind s
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eing used for a particular project.
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• employing ‘quiet’ practices
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3. Control in transmission—the ne
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8 Negotiation process8.1 The proces
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Features of a negotiated agreementp
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9 Consent/licence conditionsThe pro
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10 Applying the policy to existingi
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11 Reviewing performanceMonitoring
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• the noise instrumentation used.
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ReferencesBerglund B. & Lindvall T.
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activities may include construction
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Spectral characteristics: The frequ
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Table A1. Assessment steps1. Do a p
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In this case, the amenity criterion
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any assessment period in any season
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In this case the intrusive criterio
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able to show that the wind-induced
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Take the background noise measureme
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Appendix C Procedure for assessing
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The sections below outline the proc
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Appendix D Estimating noise increas
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Table E2. Step procedure for determ
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• hourly or three-hourly cloud ce
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Table E7. Aerodynamic roughness of
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Appendix FPercentage occurrence of
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282000 1354000 20-25284000 1354000
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394000 1362000 45-50256000 1364000
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366000 1372000 45-50368000 1372000
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338000 1382000 25-30340000 1382000
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310000 1392000 20-25312000 1392000
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282000 1402000 25-30284000 1402000
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394000 1410000 20-25256000 1412000
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366000 1420000 20-25368000 1420000
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338000 1430000 15-20340000 1430000
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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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