Dewatering Management Plan · OPW24/0032

                                                                                     ADG Consulting Pty Ltd


5.6 Groundwater treatment
     All extracted groundwater will be treated on‐site using available technologies prior to discharge to the
     stormwater network. The following treatment measures will be adopted, and will be installed and
     operational prior to the commencement of dewatering:

     1.    A groundwater pH buffering treatment system (primary treatment)
     2.    A sedimentation tank to provide additional residence time and sedimentation (secondary
           treatment).
     3.    Installation of fine media filtration to retain suspended sediments and/or heavy metals (tertiary
           treatment), if required.

     Details of the treatment systems and methodologies are provided in Section 0 of this report.

     Note: Consideration should be taken, regarding placement of treatment gear on site to enable easy
     cleaning and maintenance throughout the dewatering phase for the project. Consider the potential
     requirement for regular de‐sludging of sedimentation tank/s to suitable area onsite, if available (cost
     minimisation).




ADG1304.21 Dewatering Management Plan_Rev0_08.10.21                                                   Page 11