Noise and Vibration Report - Transnet

ENVIRO-ACOUSTIC RESEARCHSCOPING NOISE REPORT – TRANSNET: SWAZI RAIL LINK – DAVEL YARD TO NERSTON RSA ROUTEThe operating cycle and nature of the sound emission (impulsiveness, tonal character orpotential low frequencies) would, where relevant, be considered when the expectedrating level in the target area is calculated.9.3.2 Determination of Rating levelsPotential sound levels will be calculated as defined in section 5.1.9.3.3 Assessment of the noise impact: No mitigationThe significance will be determined considering the defined magnitude of the noise level,the extent as well as the duration of the projected noise impact, as well as the probabilitythat this impact may take place.The magnitude of the noise impact will be assessed by considering:• The total projected cumulative noise level compared to the appropriate acceptablerating levels as defined in table 2 of SANS 10103:2008;• The potential community response from table 5 of SANS 10103:2008. In addition,other relevant and suitable literature may be consulted as defined in the scopingreport; and• Projected noise levels considering the likely and projected ambient sound levels.Likely ambient sound levels as well as the projected change in ambient sound levelswould also be considered when estimating the probability that a NSD may be impactedby increased noise levels.9.3.4 Assessment of the noise impact: Implementation of mitigation measuresShould the significance of the impact be medium or high, the potential significance will berecalculated considering that the developer would be implementing mitigation measures.9.4 ENVIRONMENTAL NOISE IMPACT REPORTThe Environmental Noise Impact Report will cover the following points:• the purpose of the investigation;• a brief description of the planned development or the changes that are beingconsidered;• a brief description of the existing environment including, where relevant, thetopography, surface conditions and meteorological conditions duringmeasurements;• the identified noise sources together with their respective sound pressure levels orsound power levels (or both) and, where applicable, the operating cycles, theP a g e | 42