Glenbrook Sation REF (pdf 3.15MB) - Transport for NSW - NSW ...

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Review of Environmental FactorsGlenbrook commuter car park and interchange upgradeGuidelines that contain additional advice relating to potential sleep disturbance impacts have beenconsidered, including the Road Noise Policy (RNP). The RNP provides a review of research into sleepdisturbance. From the research to date, the RNP concludes that:• Maximum internal noise levels below 50 dBA to 55 dBA are unlikely to awaken peoplefrom sleep• One or two events per night, with maximum internal noise levels of 65 dBA to 70 dBA, arenot likely to affect health and wellbeing significantly.It is generally accepted that internal noise levels in a dwelling, with the windows open are 10 dB lowerthan external noise levels. Based on a worst case minimum attenuation, with windows open, of 10 dB,worst‐case short term internal noise levels are at a level that according to the RNP review is unlikely tocause awakening reactions.It is therefore concluded that the operation of the proposed commuter car park is unlikely to cause asignificant adverse noise impact at nearby noise sensitive receivers.Additional trafficIn terms of additional traffic on nearby streets, a negligible increase in traffic flow would be expected dueto the proposed commuter car park. It would also mostly be limited to peak commuter times. On thisbasis, the noise level contribution from activities within the upgraded commuter car park and anyadditional road traffic to and from the proposed commuter car park would be considered to be unlikelyto represent an adverse noise impact.6.4.6 Mitigation measuresTransport for New South Wales has prepared a Construction Noise Strategy (Transport Projects) whichprovides practical guidance on how to minimise, to the fullest extent practicable, the impacts on thecommunity from noise and vibration generated during the construction of rail projects (and relatedinfrastructure) through the application of all feasible and reasonable mitigation measures.The strategy includes a standard suite of noise and vibration management measures that are to beapplied on all projects, together with additional mitigation measures which are applicable whenconstruction noise or vibration is predicted to exceed the project’s construction noise and vibrationobjectives.The standard suite of mitigation measures includes management measures such as communityconsultation, site inductions (with guidance on how to minimise noise and vibration) and the preparationof site specific Construction Noise and Vibration Management Plans. The strategy also includes severalrecommendations for reducing the source noise levels of construction equipment via good planning andequipment selection.In many instances, impacts from construction noise are unavoidable and it is not feasible to achieve theconstruction noise objectives. Therefore the Transport for New South Wales Construction Noise Strategyincludes a list of additional noise mitigation measures which aim to minimise the potential noise impacts.These include measures ranging from letter box drops and phone calls to offers of alternativeaccommodation (should noise intensive night‐time works be required). A summary of the additionalnoise mitigation measures matrix is provided in Table 6‐20. The purpose of letter box drops is to providespecific notification of the duration and timing of the construction activities so that residents areRef No: 2260812 49
Review of Environmental FactorsGlenbrook commuter car park and interchange upgradeinformed about the proposed works ahead of time. The purpose of the monitoring is to validate theconstruction noise predictions and confirm that the noise levels from individual equipment are notexcessive.Table 6‐20 Additional Mitigation Measures Matrix ‐ Airborne Construction Noise (from Transport for New South WalesConstruction Noise Strategy)Time periodStandardOOHW Period 1OOHW Period 2Notes:Mon‐Fri (7am – 6pm)Sat (8am – 1pm)Sun/Pub hol (Nil)Mon‐Fri (6pm – 10pm)Sat (7am‐8am)Sun/Pub Hol (8am‐6pm)Mon‐Fri (10pm – 7am)Sat (10pm – 8am)Sun/Pub Hol (6pm – 7am)Mitigation measureLAeq(15min) Noise level above background (RBL)Qualitative assessment of noise levels 10 to 10 dBANoticeable10 to 20 dBAClearlyaudible20 to 30 dBAModeratelyintrusive>30dBAHighlyintrusive‐ ‐ LB,M LB,M‐ LB M, LB M,IB, LB,RO, PC, SNLB M, LB M, IB, LB,PC, SNAA, M, IB,LB, PC, SN1. The following abbreviations are used: Alternative accommodation (AA), Monitoring (M), Individual briefings (IB), Letter boxdrops (LB), Project specific respite offer (RO), Phone calls (PC), Specific notifications (SN).2. For some types of construction activities (refer Appendix B of the Transport for NSW Construction Noise Strategy), a qualitativeassessment of the potential noise impacts can be undertaken in lieu of detailed noise modelling. For these activities, noise mitigationmeasures should be evaluated on the basis of the noise levels being noticeable, clearly audible, moderately intrusive or highly intrusive.The qualitative assessment should consider the type of equipment being used, the character of the noise emissions, time of day, thelocation of the nearest receivers and the noise sensitivity of the nearest receivers. Where a qualitative assessment is being undertaken,this will need to be approved by the Environmental Management Representative.The Construction Noise Strategy requires noise monitoring and letter box drops at the nearest receiverswhere the predicted noise levels exceed 30 dB above background noise levels (i.e. exceed the daytimeNML by more than 20 dB). Due to the close proximity of the works to the adjacent receivers, and therelatively low existing background noise levels in the project area, noise monitoring and letter box dropsat the nearest receivers (with direct line‐of‐sight to the works) is applicable for the majority ofconstruction scenarios when undertaken adjacent to the identified noise‐sensitive receiver locations.For the proposed OOHWs during scenario 10 and 11, additional measures (including individual briefings,phone calls and specific notifications to affected receivers) would be required should these works beundertaken during the OOHW Period 2, as the predicted construction noise level at the nearest affectedreceiver are between 20 to 30 dB above the night‐time background noise levels.Should OOHW (evening) for scenario 12 be required, additional measures (including individual briefings,phone calls, respite offers and specific notifications to affected receivers) would be required should theseworks be undertaken during the OOHW Period 1, as the predicted construction noise level at the nearestaffected receiver are greater than 30 dB above the evening background noise levels.Ref No: 2260812 50
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TERMS AND ABBREVIATIONSReview of En
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Glenbrook Sation REF (pdf 3.15MB) - Transport for NSW - NSW ...

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