November 2004 (PDF 11.6 MB) - Barrick Gold Corporation

ambient noise levels can affect the duration required.In areas where the background noise levels areaffected significantly by nearby road traffic withregular daily pattern, three days’ worth of validdata may be sufficient. However, care should beexercised in assuming a pattern of noise levels in anarea. It is recommended that , where any doubtexists, the full week’s monitoring should be performed.In those cases where there appears not to bea regular daily pattern to ambient noise, and/or thedominant ambient noise sources are some significantdistance from the measurement location, oneweek’s valid data is likely to be required. There willalso be some circumstances where more than oneweek of valid data will be required to gain a goodunderstanding of the variation in ambient noise (forexample, where there is a wide variability in dailyassessment background levels). Any variations fromthe specified monitoring duration in Table 3.1should be fully justified in the noise assessmentreport.NSW industrial noise policy27