Warrawee Substation - Review of Environmental Factors

Warrawee Substation Page 9Operational Noise & Construction Noise & Vibration AssessmentReport No. 11332 Version BTable 4-1Intrusiveness CriteriaReceiverBrentwood AveWinton StTime PeriodRBL Intrusiveness Criterion(dBA)L Aeq,15min (dBA)Daytime (7.00am–6.00pm) 37 42Evening (6.00–10.00pm) 40 45Night time (10.00pm–7.00am) 31 36Daytime (7.00am–6.00pm) 39 44Evening (6.00–10.00pm) 42 47Night time (10.00pm–7.00am) 33 38Table 4-2Amenity CriteriaReceiverBrentwood Ave(Suburban Area)Winton St(Suburban Area)Noise Level, L Aeq,Period (dBA)OverallTime PeriodProject-SpecificAmenityAmenity CriterionCriterionDaytime (7.00am–6.00pm) 50 50Evening (6.00–10.00pm) 45 45Night time (10.00pm–7.00am) 40 40Daytime (7.00am–6.00pm) 50 50Evening (6.00–10.00pm) 45 45Night time (10.00pm–7.00am) 40 40In this case, because the noise source is relatively constant with time and not subject tosignificant variation due to meteorological effects, the L Aeq,15min and L Aeq,Period noise levels can beconsidered equivalent. From Tables 3-4 and 3-5, for the night time period, the intrusivenesscriterion is more stringent. As the assessment is based on the most stringent criteria i.e.: theintrusive criteria for the night time period, the amenity criteria is not discussed further in thisreport.