003 ECM_22828362_v1_Reference Document - OPW23 0189 · OPW26/0094

                                                                                                                 ADG Consulting Pty Ltd


                                   dewatering. The most appropriate action(s) shall be dependent on the stage of construction and
                                   risk of adverse impacts to groundwater users and the receiving environment.
                                  Any modification to the dewatering system and pumping rates shall be in consultation with a
                                   suitably qualified scientist/geotechnical/engineer.
                                  Following heavy rainfall all ponded surfaces waters are to meet discharge criteria (Table 3) prior to
                                   offsite discharge. Where discharge criteria not met, Site Manager to obtain approval from
                                   Dewatering Contractor regarding treating surface waters with treatment gear before offsite
                                   discharge.
                                  Pumping systems and shoring works to be maintained in fit for purpose state by Dewatering
                                   Contractor and/or shoring contractor. In the event that dewatering equipment has failed and is
                                   likely to cause a significant impact on the environment, or surrounding properties (i.e. flooding) the
                                   Dewatering Contractor is to be contacted immediately. The Principal Contractor, in consultation
                                   with the Dewatering Contractor shall be responsible in rectifying the failure in a practicable time
                                   frame to minimise potential impacts. Equipment, spare parts, materials and tools necessary to
                                   manage aspects of the system/s which present a high risk of significant impacts in the event of
                                   failure (if any) shall be readily available.
                                  Construction vibrations could potentially cause settlement in the loose upper level sands, thereby
                                   damaging nearby structures founded in these strata. Prior to commencement of construction on
                                   site (including staged works), it is recommended that a detailed dilapidation survey be undertaken
                                   to establish the condition of all existing adjacent structures, roads and services.




                        ADG1580.23 Dewatering Management Plan_Rev0_28.09.23                                                       Page 16




Document Set ID: 22828362
Version: 1, Version Date: 26/02/2024