November 2004 (PDF 11.6 MB) - Barrick Gold Corporation

Table 2.2. Modification to acceptable noise level (ANL)* to account for existing levelof industrial noiseTotal existing L Aeqnoise level fromindustrial sources, dB(A)Maximum L Aeqnoise level for noise from new sourcesalone, dB(A)≥ Acceptable noise level plus 2If existing noise level is likely to decrease in future:acceptable noise level minus 10If existing noise level is unlikely to decrease in future:existing level minus 10Acceptable noise level plus 1 Acceptable noise level minus 8Acceptable noise level Acceptable noise level minus 8Acceptable noise level minus 1 Acceptable noise level minus 6Acceptable noise level minus 2 Acceptable noise level minus 4Acceptable noise level minus 3 Acceptable noise level minus 3Acceptable noise level minus 4 Acceptable noise level minus 2Acceptable noise level minus 5 Acceptable noise level minus 2Acceptable noise level minus 6 Acceptable noise level minus 1< Acceptable noise level minus 6 Acceptable noise level* ANL = recommended acceptable L Aeq noise level for the specific receiver, area and time of day from Table 2.1.2.2.1 Notes to support the noise leveltables1. The recommended acceptable noise levelsrefer only to noise from industrial sources.However, they refer to noise from all suchsources at the receiver location, and not onlynoise due to a specific project under consideration.The levels represent outdoor levelsexcept where otherwise stated.2. In assessing noise levels at residences, thenoise level is to be assessed at the mostaffectedpoint on or within the residentialproperty boundary or, if this is more than 30m from the residence, at the most-affectedpoint within 30 m of the residence.3. In assessing noise levels at commercial orindustrial premises, the noise level is to beassessed at the most-affected point on orwithin the property boundary.4. Where internal noise levels are specified inTable 2.1, they refer to the noise level at thecentre of the habitable room that is mostexposed to the noise and are to apply withwindows opened sufficiently to provideadequate ventilation. In cases where thegaining of internal access for monitoring isdifficult, then external noise levels 10 dBabove the internal levels apply.5. In assessing noise levels at passive andactive recreational areas, the noise level is tobe assessed at the most-affected point within50 m of the area boundary.6. Types of receivers are defined as follows.Section 2.2.2 offers some guidance for theselection of the appropriate receiver types.Rural—means an area with an acousticalenvironment that is dominated by naturalsounds, having little or no road traffic. Suchareas may include:—an agricultural area, except those used forintensive agricultural activities—a rural recreational area such as resortareas—a wilderness area or national park—an area generally characterised by lowbackground noise levels (except in theimmediate vicinity of industrial noisesources).This area may be located in either a rural,rural-residential, environment protectionNSW industrial noise policy17