November 2004 (PDF 11.6 MB) - Barrick Gold Corporation

Appendix A—Worked case studiesA1General application case studyThis case study aims to highlight the main aspectsof the policy, and can be referred to in a number ofdifferent assessment situations.Situation: New major developmentproposed in a high-traffic areaA major development is proposed across a majorhighway from a residential area. Apart from the sitein question, the whole area is fully developed. Thereare other small industrial developments in the area.The noise impact of the proposed developmentneeds to be assessed.Important considerationsThe proposal has the following characteristics:• new development with existing receiver—hence, the assessment will require predictionof noise levels from the source.• major development—the project is a majordevelopment with a potentially high noiserisk due to its proximity to a residential area.Hence, long-term monitoring of existingnoise levels is required to obtain an adequatemeasure of the existing background(L A90,15 minute) and ambient (L Aeq,15 minute) levelspresent in the area.• residential area on a major highway—thisfits the description of an ‘urban’ receiver type(Table 2.1), so the recommended acceptablenoise level (ANL) for ‘urban’ areas applies.However, traffic noise levels may be highenough to make noise from stationarysources inaudible, even though it may exceedthe ANL. As it is highly unlikely that trafficnoise levels would decrease in future, thecriterion for high traffic areas would apply inthis case (Section 2.2.3).• other small industrial developmentspresent—the existing noise environment maybe affected by noise from existing stationarysources.Follow the assessment steps in Table A1.NSW industrial noise policy60