MCU14/0106 Appendix E - Engineering Report

Noosa Civic
Construction Environmental Management Plan



Table 4-1          Construction Stormwater Quality Objectives 1

         Water Quality Parameter                            Release Criteria
              Suspended Solids                                   < 50 mg/L
              Coarse Sediments                       Retain coarse sediments onsite
                     Turbidity                       < 10% above receiving waters
                         pH                                      6.5 – 8.5
       Hydrocarbons, Oil and Grease                No visible film; no detectable odour
                 Floating matter                              None visible
1
 Queensland Water Quality Guidelines (2009) Table 8.2.1: Summary of design objectives for management of stormwater quality and flow – construction phase of development in
Queensland.

Management Measures

    Tasks                                 Actions / Monitoring                                                                         Timing            Responsibility
    Develop an ESCP for each stage        Undertake an Erosion Hazard Assessment of the site prior to the commencement of              Ongoing           Environmental
    of the project.                       works and ensure the project CEMP and any ESCPs are commensurate with the                                      Management
    Erosion and sedimentation control     degree of environmental risk associated with the proposed works.                                               Officer
    measures must be designed in          Wherever practicable, give priority to the prevention or minimisation of soil erosion,
    accordance with the requirements      rather than the trapping of displaced sediment, and ensure the area of disturbance is
    of the Draft Urban Stormwater –       no greater than the minimum area necessary for the purpose, and limited to the
    Queensland        Best     Practice   shortest amount of time practicable.
    Environmental          Management     Select machinery to carry out the activities on the basis of a type and size necessary
    Guidelines (DERM, 2009) in order      and capable of safe operation to achieve minimal disturbance of the site.
    to     protect     the    receiving
    environment in the vicinity of the    Appropriate sediment and erosion control measures may include sediment fences
    site.                                 (anchored in a 0.2m deep compacted backfilled trench), stormwater diversion drains,
                                          rock check dams and progressive site restoration.
    Implement the ESCP for each
    stage of the project.                 Ensure unprotected slope lengths do not exceed 80m, or an equivalent vertical fall of
                                          3m, prior to a construction shutdown period or anticipated significant rainfall.
                                          Ensure stormwater diversions are included up-catchment of the project disturbance
                                          footprint.
                                          Ensure trenches/excavated areas are backfilled, capped with topsoil and compacted to
                                          a level at least 75mm above the adjoining ground level, and appropriately stabilised.
                                          Machine-compact, seed and mulch all temporary earth banks and flow diversion



Noosa Civic                                                                      Version 1                                                                 November 2014
Appendix B - Construction EMP.docx                                                                                                                              Page 13