November 2004 (PDF 11.6 MB) - Barrick Gold Corporation

in the normal way. Definitions of the extent of thisregion are contained in many noise textbooks (forexample, Bies & Hansen 1996). Any calculationsshould be done in accordance with the validationrequirements set out in Section 6.2.Determining the noise contribution from a development.The following techniques may be used todetermine the L Aeqcontribution from a particularindustrial source from among multiple industrialnoise sources:• measuring existing noise levels with andwithout the premises operating• measuring the noise emissions from each ofthe premises at reference locations and thencalculating the noise-emission levels back tothe receiver• using an accepted noise model calibrated forthe particular locality and source.In the case where transportation sources exist, thenoise contribution from a development may bedetermined by isolating the transportation noiselevel using one of the methods outlined in Section3.2.1.11.1.3 Non-compliances with noiseconditionsWhen is a development in non-compliance with anoise condition?A development will be deemed to be in non-compliancewith a noise consent or licence condition if themonitored noise level is more than 2 dB above thestatutory noise limit specified in the consent orlicence condition. This may occur for two reasons:• The noise from the development is excessive,in which case the development is truly notcomplying with its consent or licencecondition.• The noise was increased by extreme, nonstandardweather effects—in which case thedevelopment is not considered to be in noncompliancewith its consent or licencecondition. Non-standard weather effects canbe considered to be present duringmonitoring if the cloud cover is less than 40per cent and the wind speed (at 10 m height)is less than 1.0 m/s (represents an extremelyadverse weather condition for noise)—duringthe period from 6 pm to 7 am in non-aridareas (see Section 9.2).In this latter case, further monitoring at a later dateis required to determine compliance under themeteorological conditions specified in the consent/licence condition.Managing non-compliancesWhere the noise exceedance is found to be causedby excessive noise levels from a development, thedevelopment is considered to be in non-compliancewith its consent or licence condition. Strategies formitigation of noise need to be considered andimplemented, or a further negotiation process couldbe commenced.When is a development in breach of a noisecondition?A development will be in breach of a noise consentor licence condition if sustained non-compliancesare not addressed and rectified.11.1.4 Items to be reportedThe results of a noise monitoring test should beclearly reported and forwarded to the relevantauthority (if requested), or kept on file for reference.It is recommended that they also be made readilyaccessible to the community.The following items are to be included in a noisemonitoring report:• the type of monitoring test conducted (that is,the development stage or receiver complaints)• the development noise limits on the consent/licence• descriptions of the nearest affected receiversor, in the case of receiver complaints,description of the complainant andcomplaint• the monitoring location—this should be atthe most affected point at or within thereceiver’s boundary or, if that is more than30 m from the receiver’s premises, at the mostaffected point within 30 m of the premisesNSW industrial noise policy52