Warrawee Substation - Review of Environmental Factors

Assessment of the environmental impacts and risksActivities Street Noise criteria(dBA)Predictednoise levelrange (dBA)Exceedance range(dBA)SuperstructureconstructionRoadpavementBrentwood 37 56-64 9-17Winton 39 60-65 11-16Brentwood 47 70-75 23-38Winton 49 64-65 15-16Hastings 47 68-79 21-32Site clean-up Brentwood 47 65-73 18-26Winton 49 69-74 20-25Fitout andcommissioningBrentwood 47/42/39 1 59-67/56-64 2 12-20/14-22/20-28 3Winton 49/44/38 1 62-67/60-65 2 13-18/16-21/22-27 3Note 1: Day Criteria/Out of hours day criteria/Out of hours night criteriaNote 2: Predicted noise levels day/Predicted noise levels nightNote 3: Exceedance day/Exceedance out of hours day/Exceedance out of hours nightThe predicted noise levels in Table 3.8 are considered to be the worst case scenariowith all plant and equipment required during these actvities operating at the sametime. This means that the true levels would mostly be lower than those in Table 3.8.While the noise levels are expected to exceed the criteria, they are predicted toremain below the highly noise affect limit of 75 dBA. These impacts would beminimised where possible through the implementation of control measures outlined inSection 3.5.4.Sleep disturbanceSome out of hours works would potentially be required between 6am and 7am. Theseworks would be related to the use of cranes and delivery trucks to deliver materialsand equipment. The use of this equipment would potentially result in sleepdisturbance.The NSW Road Noise Policy (RNP) (DECCW, 2011) indicates that where maximumlevels below 60-65dBA at a receiver are considered unlikely to cause awakeningreactions. The L Amax noise levels are predicted to exceed 60dBA at the closestresidences as shown in Table 3.9. Receivers with predicted maximum noise levelsabove 60dBA are presented in Table 3.9. At these receivers, it is likely that sleepdisturbance would occur between 6am to 7am. Control measures would therefore beimplemented to minimise the need for and frequency of activities that would beundertaken outside standard work hours and have the potential to lead to sleepdisturbance. RailCorp will notify residents if any out of hours work is required.Warrawee Substation Project/Review of Environmental FactorsPage 32 of 64