SUPERSEDED Reference Document

                                                                              ADG Consulting Pty Ltd


                                                       Table of Contents
1        INTRODUCTION                                                                            1
1.1      PROPOSED DEVELOPMENT                                                                    1
1.2      RELEVANT GUIDELINES                                                                     1
1.3      GENERAL ENVIRONMENTAL DUTY                                                              1
1.4      DMP OBJECTIVES                                                                          2
1.5      SCOPE OF WORK                                                                           2
2        SITE CHARACTERISTICS                                                                    3
2.1      PROPERTY DESCRIPTION                                                                    3
2.2      SURROUNDING ENVIRONMENT                                                                 3
2.3      TOPOGRAPHY                                                                              3
2.4      GEOLOGY & SOILS                                                                         3
2.5      HYDROGEOLOGY                                                                            3
3        PREVIOUS INVESTIGATIONS                                                                 4
3.1      DOUGLAS PARTNERS 2024                                                                   4
3.1.1    SOILS                                                                                   4
3.1.2    GROUNDWATER                                                                             4
3.2      GROUNDWATER QUALITY                                                                     5
4        WATER QUALITY OBJECTIVES                                                                6
4.1      RECEIVING ENVIRONMENT                                                                   6
4.2      DEVELOPMENT OF WATER QUALITY OBJECTIVES                                                 6
4.3      PROPOSED WATER QUALITY OBJECTIVES                                                       7
5        DEWATERING METHODOLOGY                                                                  9
5.1      BASEMENT EXCAVATION AND SHORING                                                         9
5.2      GROUNDWATER EXTRACTION                                                                  9
5.3      EXTRACTION/DISCHARGE RATES AND VOLUME                                                   9
5.3.1    DEWATERING EXTRACTION CALCULATION BASED ON SUBSURFACE SOIL PROFILE                      9
5.4      DEWATERING DURATION                                                                     10
5.5      GROUNDWATER DRAWDOWN                                                                    10
5.6      GROUNDWATER TREATMENT                                                                   11
5.7      NOMINATED HOLD POINTS                                                                   11
6        WATER QUALITY MANAGEMENT                                                                12
6.1      RESPONSIBILITY                                                                          12
6.2      OPERATIONAL POLICY                                                                      12
6.3      PERFORMANCE CRITERIA                                                                    12
6.4      IMPLEMENTATION STRATEGY                                                                 12
6.4.1    GROUNDWATER TREATMENT SYSTEMS                                                           12
6.4.2    DEWATERING STRATEGY                                                                     13
6.4.3    INITIAL PUMP‐OUT                                                                        13
6.5      MONITORING                                                                              13
6.5.1    VISUAL MONITORING                                                                       13
6.5.2    WATER QUALITY MONITORING                                                                13
6.5.3    MONITORING RESPONSIBILITIES                                                             14
6.6      MAINTENANCE                                                                             15
6.7      REPORTING                                                                               15
6.8      CONTINGENCIES                                                                           15
7        NOISE & ODOUR MANAGEMENT                                                                17
7.1      RESPONSIBILITY                                                                          17
7.2      OPERATIONAL POLICY                                                                      17
7.3      PERFORMANCE CRITERIA                                                                    17
7.4      IMPLEMENTATION STRATEGY                                                                 17
7.4.1    NOISE                                                                                   17
7.4.2    ODOUR                                                                                   17
7.5      MONITORING                                                                              17


    ADG1668.24 Dewatering Management Plan_Rev0_12.07.24                                       Page iii