Reference Document - OPW23 0189

                                                                                             ADG Consulting Pty Ltd


7        Noise & odour management
7.1      Responsibility
         The Project Manager is responsible for ensuring the appropriate management of noise and odour during
         dewatering operations.
7.2      Operational policy
         To minimise noise and odour emissions generated from the site during dewatering.
7.3      Performance criteria
         The appropriate criteria to measure the performance of dewatering management at the site are provided
         below.
         1.    No noise or odour related complaints received from neighbouring residents or the community.
         2.    No degradation of air quality due to fumes or odours emanating from the dewatering process.
7.4      Implementation strategy
         Noise and odour emissions will be managed as described in the following sections.
7.4.1 Noise
         All dewatering equipment must be operated appropriately and maintained in good working order. All
         dewatering systems and plant must be fitted with the appropriate noise reduction equipment to comply
         with the performance criteria. Non‐complying dewatering plant will be replaced or repaired as necessary.

         It is proposed to employ noise mitigation strategies including use of electric pumps and dewatering
         systems rather than diesel powered equipment. Noise attenuation blankets and screens will be installed
         around noise generating dewatering pumps and equipment where practicable. Noise monitoring
         equipment (unattended) will be installed by the site manager prior to commencement and monitored for
         the duration of dewatering.
7.4.2 Odour
         All dewatering plant must be fitted with the appropriate emission reduction devices. Where practicable,
         all dewatering plant will be sealed to prevent the release of odours to the atmosphere. Fine mist odour
         control sprays will be applied to reduce offensive odours if complaints are received from neighbouring
         residents.
7.5      Monitoring
         An inspection of the site and dewatering equipment shall be undertaken daily by the Site Manager to
         identify the following:
              Excessive noise being generated by the dewatering systems and plant; and
              Strong or offensive odours being generated by the dewatering equipment and/or extracted
               groundwater.
         Noise monitoring equipment (unattended, continuous logging) is proposed to be installed by the Site
         Manager prior to commencement and monitored for the duration of dewatering. The Environmental
         Protection (Noise) Policy 2019 (EPP(Noise)) identifies specific acoustic quality objectives (noise criteria)
         to assist in preventing significant impacts on noise sensitive receptors and as a guide to long‐term
         acoustic quality for sensitive receptors. The primary EPP(Noise) criteria relevant to this investigation is
         outside a dwelling (i.e. adjacent dwellings), which should not have noise at levels in the daytime or
         evenings greater than 50dB(A) LAeq,adj,1hr. This means that noise levels in the receiving environment
         outside of nearby dwellings (i.e. on balconies) should not exceed an equivalent sound energy as would
         be received from a one hour continuous sound of 50 decibels on the A‐weighted scale (adjusted for tonal
         character perceptible by the human ear).




    ADG1580.23 Dewatering Management Plan_Rev0_28.09.23                                                       Page 17