Warrawee Substation - Review of Environmental Factors

Assessment of the environmental impacts and risksIssueNoise andvibrationControl measuresminimises windblown or traffic generated dust. Areas that maybe inaccessible by water carts would be kept in a condition thatminimises windblown or traffic generated dust using othermeans.All trucks would be covered when transporting material to andfrom the site.All construction plant and machinery would be fitted withemission control devices complying with Australian DesignStandards.Plan works to start at 7am such to avoid the need to complywith night time criteria and sleep disturbance criteria.Noise emission levels of all critical items of mobile plant andequipment should be checked for compliance with noise limitsappropriate to those items prior to the equipment going intoregular service. To this end, a testing regime should beestablished with the principal contractor using manufacturerdata where possible.All fixed plant and stationary mobile plant at the work sitesshould be appropriately selected, and where feasible, fittedwith silencers, acoustical enclosures and other noiseattenuation measures.Erection of a 2.4 metre high plywood noise barrier around thesite (including compound) to attenuate levels of constructionshould be considered during construction planning, as thiswould potentially contribute up to a 10dB attenuation of noiselevels at receiver. However, due to the topography of the site,use of noise barriers on site may only provide limited benefit.Limit usage of hydraulic hammers whenever possible andinstead use rock saws and rippers; or if necessary utilise quiet‘city hammers’ as appropriate.Ensure that truck movements along the work site areperformed in an efficient manner to minimise the need forreversing, therefore minimising reversing alarm noise, anduse smart reversing alarms or squawkers in place oftraditional reversing alarms for all mobile plant to minimise theintrusiveness of reversing alarms.Conduct a combination of attended and unattended noisemonitoring of works during the initial stages especially ‘Out-Of-Hours’ works at the closest receivers to record typicallevels at the residential receivers.Communicate with the impacted residents by clearlyexplaining the duration, nature of works prior to and duringWarrawee Substation Project/Review of Environmental FactorsPage 56 of 64