j1701177 001 r rev1 - epa wa

WA MARINE PTY LTD | ABN 84 168 014 819 | www.o2marine.com.au

Onslow Marine Support Base Stage 2: Dredging & Spoil Disposal Management Plan

CLIENT:

OMSB Pty Ltd

STATUS:

Rev F

REPORT NUMBER:

1702034

ISSUE DATE:

10th November 2017

DRAFT

OMSB Stage 2: DSDMP Page ii OMSB Pty Ltd 17WAU-0008 /R1702034

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This report has been prepared for the sole use of the OMSB Pty Ltd (herein, ‘the client’), for a specific site (herein ‘the site’, the specific purpose specified in Section 1 of this report (herein ‘the purpose’). This report is strictly limited for use by the client, to the purpose and site and may not be used for any other purposes.

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O2 Marine waives all responsibility for loss or damage where the accuracy and effectiveness of information provided by the Client or other third parties was inaccurate or not up to date and was relied upon, wholly or in part in reporting.

OMSB Stage 2: DSDMP Page iii OMSB Pty Ltd 17WAU-0008 /R1702034

WA Marine Pty Ltd t/as O2 Marine ACN 168 014 819 Originating Office – Dunsborough Suite 5 5/18 Griffin Drive, Dunsborough WA 6281 PO Box 1370 Dunsborough WA 6281 T 1300 739 449| F 61 7 3339 7222 | [email protected]

Version Register

Version Status Author Reviewer Change from

Previous Version

Authorised for Release

Signature Date

Rev A Draft J. Abbott C. Lane N/A

Rev B Draft J. Abbott

W. Bowyer

R. Hanley N/A

Rev C Draft J. Abbott

W. Bowyer

R. Hanley N/A

Rev D Draft W. Bowyer

C. Lane

R. Hanley Update to dredging methodology

Rev E Draft W. Bowyer

C. Lane

R. Hanley Update Geotechnical information

Include water quality monitoring program

On File 3/11/2017

Rev F Draft W. Bowyer

C. Lane

R. Hanley Minor amendments to Section 8.

On File 10/11/2017

DOCUMENT IS TO REMAIN IN DRAFT UNTIL MINISTERIAL STATEMENT HAS BEEN ISSUED

Transmission Register

Controlled copies of this document are issued to the persons/companies listed below. Any copy of this report held by persons not listed in this register is deemed uncontrolled. Updated versions of this report if issued will be released to all parties listed below via the email address listed.

Name Email Address

Andrew Natta [email protected]

mailto:[email protected]

OMSB Stage 2: DSDMP OMSB Pty Ltd 17WAU-0008 /R1702034

Table of Contents

1. Introduction 7

1.1. Background 7 1.2. Proposal Summary 7 1.3. Proponent 7 1.4. Purpose 8

2. Description of Works 9

2.1. Proposal Description 9 2.2. Proposal Key Characteristics 9 2.3. Scope of Construction Work 12 2.4. Mobilisation and Site Installation 13 2.5. Site Facility 13 2.6. Pipeline Installation (Floating) 14 2.7. Pipeline Installation (Land) 14 2.8. Installation of Cutter Suction Dredge 15 2.9. Pre and Post Dredge Hydrographic Survey(s) 15 2.10. Dredging 15 2.11. Onshore Dredge Spoil Disposal 19

3. Stakeholder Consultation 29

3.1. Stakeholder consultation 29 3.2. Dredging Technical Advisory and Consultative Committee 29

4. Roles and Responsibilities 31

5. Environmental Factors and Objectives 32

6. Management 36

6.1. Benthic Communities and Habitats 36 6.2. Coastal Processes 39 6.3. Marine Environmental Quality 40 6.4. Marine Fauna 40 6.5. Flora and Vegetation 46 6.6. Terrestrial Environmental Quality 48 6.7. Terrestrial Fauna 49 6.8. Hydrological Processes 51 6.9. Air Quality 52 6.10. Social Surrounds 53

7. Waste Management 54

8. Monitoring 55

8.1. Marine Water Quality Monitoring Program 55 8.2. Discharge Water Quality Monitoring Program 62

9. Reporting 68

9.1. Daily Inspections/Checklists 68

10. Review 70

11. References 71


Figures

Figure 1 OMSB Stage 2 project area, including proposed capital dredging area and spoil disposal location 11 Figure 2 Floating Pipeline route for dredging Turning Basin 14 Figure 3 Schematic overview of a Cutter Suction Dredge 16 Figure 4 Details of a "Rosebud" cutter head 16 Figure 5 Graphical presentation of the work methodology of a CSD 17 Figure 6 Graphical presentation of the Box Cut Method 17 Figure 7 Damen Cutter Suction Dredger CSD 450 specifications (DAMEN 2017) 19 Figure 8 Particle Size Distribution OMSB Stage 1 21 Figure 9 DMMA layout 24 Figure 10 Dredge Spoil Disposal Stage 1 25 Figure 11 Dredge Spoil Disposal Stage 2 26 Figure 12 Dredge Spoil Disposal Stage 3 27 Figure 13 Location of the Priority 3 Species, Stackhousia clementii, located adjacent to the pipeline route corridor

47 Figure 14 Marine Water Quality Monitoring Program - Tiered Management Framework 57 Figure 15 Indicative MWQMP Monitoring Locations - Winter 59 Figure 16 Indicative MWQMP Monitoring Locations - Transitional 60 Figure 17 Indicative MWQMP Monitoring Locations - Summer 61 Figure 18 Discharge Water Quality Monitoring Program - Tiered Management Framework 64 Figure 19 Indicative DWQMP Monitoring Locations 66

Tables

Table 1 Proponent details 7 Table 2 Location and proposed extent of physical proposal elements 9 Table 3 Preliminary project construction schedule. 13 Table 4 Proposed Plant and Equipment 13 Table 5 Geotechnical test results for engineering geological units (CH2MHILL 2014) 22 Table 6 Descriptive statistics of sediment PSD from the berth pocket/turning circle, inner channel and outer

channel 22 Table 7 Roles and Responsibilities of Key Personnel 31 Table 8 Potential environmental impacts and associated project specific Environmental Protection Outcomes and

Management Targets. 32 Table 9 Management actions to minimise impacts on Benthic Communities and Habitats. 36 Table 10 Management actions to minimise impacts on Coastal Processes. 39 Table 11 Management actions to minimise impacts on Marine Environmental Quality. 40 Table 12 Management actions to minimise impacts on Marine Fauna. 43 Table 13 Management actions to minimise impacts on Flora and Vegetation 46 Table 14 Management actions to minimise impacts on Terrestrial Environmental Quality. 48 Table 15 Management actions to minimise impacts on Terrestrial Fauna. 49 Table 16 Management actions to minimise impacts on Hydrological Processes. 51 Table 17 Management actions to minimise impacts on Air Quality. 52 Table 18 Management actions to minimise impacts on Social Surrounds. 53 Table 19 Waste management objectives and measures. 54 Table 20 Environmental Protection Outcomes, Management Targets and Trigger Levels for protection of BCH from

dredging related impacts 56 Table 21 Indicative MWQMP Monitoring Locations 58 Table 22 Environmental Protection Outcomes, Management Targets and Trigger Levels for protection of marine

environmental quality and intertidal BCH from potential tail water discharge impacts 63 Table 23 Indicative DWQMP Monitoring Locations 65 Table 24 Reporting requirements during dredging and dredge disposal. 68


Appendices

Appendix A Port of Ashburton Technical Advisory and Consultative Committee – Terms of Reference

Appendix B Environmental Quality Plan

Appendix C Stage 2 Geotechnical Investigation (GALT Geotechnics 2017)


1. Introduction

1.1. Background Beadon Creek is located approximately 2 km East of the town of Onslow in the Pilbara, within the Shire of Ashburton. Onslow is located 1386 kms north of Perth and 360 kms south of Karratha. The township is 80 km west off the North West Coastal Highway. It is ideally located to service offshore locations including the Mackerel Islands, Barrow Island (Gorgon LNG Plant), Exmouth Gulf, and the Carnarvon Basin (oil and gas reserves) as well as in-land mines including Rio Tinto’s Mesa A site and Pannawonica.

The Beadon Creek Maritime Facility was developed in 1964 and is managed by the Department of Transport (DoT). The facility is used as a harbour for both recreational and commercial activities, but has recently transformed from a small facility supporting local and charter fishing activities to a significant facility supporting the myriad of industrial and commercial activities associated with the growing offshore oil and gas industry in the region. The Beadon Creek Maritime Facility covers an area of 15.29 ha and includes ~260 m wharf face, mooring berths, cyclone moorings, public service wharf, dual public boat ramp, diesel fuelling facilities, public car park and fish cleaning facilities.

In 2012, DoT proposed to upgrade the current facilities in Beadon Creek via the capital dredging of 65,000 m3 of material to create a berth pocket to -2.6 m Chart Datum (CD) and turning basin to a design depth of -1.6m CD, immediately west of the existing channel (BMT Oceanica 2015). The proposed works were referred to the Environmental Protection Authority (EPA) in August 2013 and determined to be 'Not Assessed - Public Advice Given' in April 2014 (EPA 2014).

These upgrade works to the Beadon Creek Maritime Facility were undertaken by DoT in conjunction with Onslow Marine Support Base Pty Ltd (OMSB), as part of Stage 1 of the OMSB Project. Works for this stage included construction of a 2.58 ha land-backed wharf within the existing Beadon Creek Maritime Facility and capital dredging to facilitate the development of a marine support facility. Stage 1 of this project is now nearing completion and OMSB proposes to improve vessel access to the facilities as part of Stage 2 of the project.

1.2. Proposal Summary OMSB Pty Ltd is proposing to modify and extend the Beadon Creek harbour approach channel (HAC), turning circle and berth pocket as part of Stage 2 of the OMSB project. The proposed capital dredging will enable offshore supply vessels to access the newly-constructed OMSB land-backed wharf infrastructure within the DoT managed, Beadon Creek Maritime Facility. Dredge material will be disposed of onshore within surplus land adjacent to the Onslow airport. A detailed description of the Proposal, including the key proposal characteristics is provided in Section 2.

1.3. Proponent The proponent for the Proposal is OMSB Pty Ltd. Proponent details are provided in Table 1.

Table 1 Proponent details

Company Name: OMSB Pty Ltd

Australian Business Number (ABN): 59 167 963 715

Address: Level 3, Suite 24, 25 Walters Drive, Osborne Park WA 6017

Key Contact (Role): Andrew Natta (OMSB Director)

Key Contact Details: Phone: +61 488 888 960

Email: [email protected]

mailto:[email protected]


1.4. Purpose The purpose of this DSDMP is to outline the proposed construction activities required for the project and to identify and manage potential environmental impacts associated with these works. Project specific objectives have been developed to ensure the environmental factors outlined in the EPA Statement (2016) are protected. Specific management actions for both dredging operations and sediment disposal activities have been developed to measure compliance against these specific project objectives.


2. Description of Works

2.1. Proposal Description OMSB propose to modify and extend the harbour approach channel, turning circle and berth pocket as part of Stage 2 of the OMSB Project. The proposed capital dredging will enable offshore supply vessels to access the newly-constructed OMSB land-backed wharf infrastructure within the Beadon Creek Maritime Facility.

The capital dredging proposed includes a turning basin and channel to a declared depth of - 6.0 m CD and a berth pocket to -8.0mCD, with a total dredge volume anticipated to be approximately 946,450 cubic metres (Figure 1). Dredging will be undertaken using a medium-sized cutter suction dredge (CSD) over a period of approximately eight (8) months.

Dredge material is proposed to be hydraulically transported from the dredge location to the proposed Dredge Material Management Area (DMMA) (Figure 1). The disposal site is located adjacent to the Onslow Airport, within freehold land owned by the Shire of Ashburton (SoA). During dredging, the dredge spoil area will be dewatered to the intertidal flats between the disposal site and the western tributary of Beadon Creek. In accordance with the strategic objectives of the SoA to meet the region’s demand for affordable serviced industrial land, the material is proposed for future reuse to develop and extend the Light Industrial Area in Onslow.

2.2. Proposal Key Characteristics The key characteristics of the dredging and spoil disposal (Construction) elements of the Proposal are summarised in Table 2.

Table 2 Location and proposed extent of physical proposal elements

Element Location Proposed Extent

Physical Elements

Approach Channel Figure 1 Harbour approach channel (HAC) dredge area of 32 ha, with a target depth of -6.0 m CD, width of 55 metres (m) and length of 2 km.

Direct removal of 21 ha of nearshore subtidal benthic communities and habitat (BCH) from within the HAC dredge area.

Turning Basin Figure 1 Turning basin dredge area of 2 ha, with a target depth of -6.0 m CD and a diameter of 143 m.

Berth Pocket Figure 1 Berth pocket dredge area of 3 ha, with a target depth of -8.0 m CD.

Dredge Material Management Area (DMMA)

Figure 1 Onshore spoil disposal area of 44 ha.

Clearing of no more than 15.5 ha of native vegetation within the onshore spoil disposal area.

Channel Navigation Markers Unspecified. Floating (i.e. moored) channel navigation markers (approximately 15) will be installed within the development areas as required.

No removal of BCH is required.

Dredge Material Disposal Pipeline Figure 1 (Two Options Proposed)

450 mm diameter pipeline installed within a 50 m wide pipeline route corridor. Pipeline confined to existing tracks and road reserve. Clearing of 0.3 ha of native vegetation is expected within the pipeline corridor.

Operational Elements

Capital Dredging – Approach Channel

Figure 1 Capital dredging of 773,500 m3 of marine sediment from within the harbour approach channel dredge area to target depth of -6.0 m CD.


Element Location Proposed Extent

Capital Dredging – Turning Basin Figure 1 Capital dredging of 71,800 m3 of marine sediment from within the Turning Basin dredge area to target depth of -6.0 m CD.

Capital Dredging – Berth Pocket Figure 1 Capital dredging of 101,150 m3 of marine sediment from within the Berth Pocket dredge area to target depth of -8.0 m CD.

Dredge Material Disposal Pipeline Figure 1 Temporary installation of 450 mm diameter onshore pipeline and booster stations within the pipeline corridor to transport dredge material from floating pipeline to DMMA.

Onshore Spoil Disposal to DMMA Figure 1 Disposal of approximately 946,450 m3 of clean, uncontaminated marine sediment to the DMMA.

Onshore Spoil Disposal Dewatering

Figure 1 Controlled discharge of approximately 21 megalitres (ML) per day of dredge spoil return water to the adjacent intertidal catchment of Beadon Creek.

Channel Navigation Markers Unspecified Floating (i.e. moored) channel navigation markers will be installed within the development areas as required.


Figure 1 OMSB Stage 2 project area, including proposed capital dredging area and spoil disposal location


2.3. Scope of Construction Work The scope of construction elements of the Proposal includes:

1. Mobilisation and installation of a dedicated Cutter Suction Dredge (CSD); 2. Mobilisation and Installation of all pipeline (floating and land based) including required booster

stations in order to discharge all of the dredged materials in the DMMA; 3. Preparation of the DMMA; 4. Dredging of the Berth Pocket and discharging of dredged materials to the DMMA; 5. Dredging of the Turning Circle and discharging of dredged materials to the DMMA; 6. Dredging of the Harbour Approach Channel (HAC) and discharging of dredged materials to the

DMMA; 7. Dredged materials handling at the DMMA required; 8. Dredge tail water discharge from the DMMA to the adjacent Beadon Creek intertidal area as

required; 9. Pre- and post-dredge hydrographic Survey(s); and 10. Demobilisation and site clearance upon completion of the Works.

2.3.1. Sequencing of the Works

The project allows for all Works to be carried out 24 hours per day, 7 days per week. The planned project sequence is as follows, whereby the tasks listed below may occur concurrently or overlap if multiple work fronts are achievable.

1. Equipment preparation; Inspection; Certification; 2. Preparation of all relevant Project Management Plans; 3. Pre-dredge hydrographic survey and land survey for the disposal area; 4. Mobilisation of all plant and equipment; 5. Site set-up including construction of pipeline(s), road Crossings and Over-paths, but excluding the

installation of the Culvert under Beadon Creek; 6. Preparation of disposal area(s); 7. Commence and complete dredging of Swing Basin and discharging of dredged materials; 8. Commence and complete dredging of HAC-North; HAC-Bend; HAC-A; HAC-B and discharge of

dredged materials; 9. Commence and complete dredging of HAC-South and Berth pocket and discharge of dredged

materials; 10. Progressive Hand-Over Hydrographic Surveys for each section as per item 7-9 above; 11. Final land-survey of “as-placed” dredged materials; 12. Demobilisation and site clearing.

Reference is made to Section 2.3.2 for preliminary construction durations.

2.3.2. Preliminary Construction Schedule

Under the current project schedule, dredging construction activities are planned to commence in Quarter 4, 2017 once all required internal and external approvals are granted. Dredging and onshore spoil disposal is proposed to be undertaken over a period of approximately eight months. An indicative project schedule is presented in Table 3.


Table 3 Preliminary project construction schedule.

Project Schedule Milestone Estimated Duration

Project Preliminaries 5 Weeks

Mobilisation & Installation 13 Weeks

Dredging & Spoil Disposal (Turning Basin) 5 Weeks

Dredging & Spoil Disposal (Approach Channel inside Training Wall) 10 Weeks

Dredging & Spoil Disposal (Approach Channel Offshore) 13 Weeks

Dredging & Spoil Disposal (Berth Pocket) 2 Weeks

Demobilisation & Site Clearance 3 Weeks

2.4. Mobilisation and Site Installation All plant and equipment including pipeline will be transported via sea and/or public road from the various locations around Australia and the world to the Project Site at Onslow in WA. Two 200T mobile cranes will be mobilised from Karratha to assist with dredge assembly and to lift the dredge and auxiliary equipment into the water. Other required marine equipment (e.g. work boats and crew transfer vessels) will be chartered locally. Relevant required civil plant will be hired locally. Sufficient marine and land based survey equipment will be brought to site to successfully deliver the works. The range of equipment which is intended to be utilised on this project includes items listed in Table 4.

Table 4 Proposed Plant and Equipment

Equipment Name From Transport

Cutter Suction Dredge DAMEN CSD500 The Netherlands Sea / Road

Booster Barge RED DOG Fremantle, WA Road

Multicat DAMEN 1506 China Sea

Booster Station Booster #06 Adelaide, SA Road

Booster Station Booster #07 Adelaide, SA Road

±3.5km of Fl. Pipeline N/A Various, interstate Road

±3.2km of L. Pipeline N/A Various, interstate Road

Various Civil Plant N/A Onslow Road

Auxiliary plant and Equipment Various Various, local and interstate Road

2.5. Site Facility The area which is intended for use for site facilities and lay-down is located on Lot 12 (Now an amalgamated Lot 13) north of the recently completed land backed wharf.

The Lay-Down area will need to provide sufficient storage space to store the containers with spare parts, pipeline, booster stations, etc. A basic site office with relevant amenities will be set-up. This site office will contain all the requirements under the contract as well as the superintendent’s office (if required). A base station for survey will also be installed here to ensure the accuracy of works.


2.6. Pipeline Installation (Floating) In general, the floating pipeline will run from the back of the dredge to the shore connection. When the pipeline becomes longer than 1300 m, a floating booster station (RED DOG) will be added to the line. The floating pipeline will be supported by floatation devices (buoys) to maintain sufficient buoyancy (and thus visibility) at all times. The Contractor may opt to have a fixed section of the pipeline submerged.

The first section to be dredged is the Turning Basin, which does not require a floating booster – Refer Figure 2.

Figure 2 Floating Pipeline route for dredging Turning Basin

After dredging the Turning Basin, the northern sections of the Approach Channel will be dredged and progressively more floating pipeline will be added. In order to add pipeline, pipeline strings of up to 180 m (15 lengths) will be prepared in advance and will be scheduled to be added when the CSD is not operational (during periods of bunkering and scheduled repairs/maintenance).

The final section to be dredged will be the southern section of the Approach Channel (south of the Turning Basin) and the berth pocket. The length of floating pipeline will be reduced to approximately 500 m.

2.7. Pipeline Installation (Land) The shore pipeline will have a fixed route from the shore connection towards the start of the dredge disposal site. There are a couple of road crossings and overpasses identified of which the major one is the crossing with Beadon Creek Road and the Discovery Park Crossing (Locations per Figure 1).

There will be two fixed land-based booster stations. During discharge operations, additional lengths of pipeline will be added as the site progresses in size.


2.8. Installation of Cutter Suction Dredge The commissioning activities will take place after the CSD has been assembled and placed in the water. This will include the installation of the latest version of the DREDGEPACK software updated with the design of the various dredge areas.

A number of dredge parameters will be calibrated and the dredge will be towed into position for the first cut.

2.9. Pre and Post Dredge Hydrographic Survey(s) Each identified dredge section (separable portion) within the contract will have an individual pre-dredge hydrographic survey performed to determine as accurately as possible the total volume which is to be removed. Upon completion of the Works in each section, a post dredge hydrographic survey will be carried out to determine if the specifications for that section has been met.

Both surveys (pre- and post) will form part of the final hand-over documents and will serve to calculate the final volumes removed and the payment volume considering the maximum payable depth.

2.10. Dredging A general description of the operations of a CSD is provided in the following paragraphs to provide an overview of how these dredgers operate, , followed by a more detailed description of the methodology specifically for this project.

2.10.1. Basics of Dredging Methodology

A CSD is typically a stationary dredge and consists of a U-shaped pontoon, which is held in position by a fixed spud and two anchors.


Figure 3 Schematic overview of a Cutter Suction Dredge

The soil is loosened by rotating a cutting head (the “cutter”). The cutter head, which is hydraulically driven, encloses the suction intake of a centrifugal (dredge) pump. The cutter head is mounted at the extremity of a fabricated steel structure (the ‘ladder’), which is attached to the main hull by heavy hinges, enabling rotation in the vertical plane. The ladder assembly is lowered and raised by means of the ladder winch controlled from the operator’s cabin.

Figure 4 Details of a "Rosebud" cutter head

During the dredging activities, the CSD swings around the main spud with the help of its side winches. The operation of the cutter section consists of cutting the seabed with the cutter head and pumping the mixture of water and materials by means of the centrifugal pump into the suction mouth.

The anchors to achieve this movement will be placed in such a manner to minimise intermediate relocation. The total area which a dredge can cover without re-locating its anchors is called the “cut”. Depending on the


width and length of the dredge area, several “cuts” might be needed. Each “cut” will then have an overlap with another cut to cover the entire dredge area (Figure 5).

Figure 5 Graphical presentation of the work methodology of a CSD

After loosening and suction, the soil is pumped through a floating and/or submersed pipeline, which is connected to the rear end of the CSD, to the allocated discharge location.

2.10.2. Dredging Stage 2

Each identified section will have a pre-dredge survey performed prior to commencement of that section to determine the final cut-plan. The cut-plan will be based on the Box-cut Method (Figure 6). The number of Box-cut layers will be dependent on the soil type and the total depth to be dredged. As such the number of dredged layers within one box can be different. Since the dredged slopes are relative steep, the areas with grey markings in the figure below will collapse and fill the gap below.

Figure 6 Graphical presentation of the Box Cut Method

During the dredging works intermediate surveys will be carried out to monitor the progress and are used for internal planning purposes. Immediately upon completion of a section this will be handed over to the client by means of a post dredge survey. Details of the out-survey method are to be integrated into the contract.

To enable the dredged materials to be transported hydraulically over a length of approximately 5-6 km and to generate a constant flow of material in the pipeline, at least two booster stations have to be installed at


various locations. The positioning of the boosters are important to guarantee a stable system and to maintain a minimum required pressure level throughout the pipeline alignment.

The total length of the pipeline, the diameter of the pipeline, the constitution of the material transported – friction losses – and the capacity of the CSD determine the capacity and locations of the required booster stations.

2.10.3. Survey Works

The survey works consists of both hydrographic and topographic surveys. Hydrographic surveys will be carried out for dredging works whilst Topographic Surveys will be carried out for the Reclamation Works.

2.10.4. Hydrographic Survey

A shallow-draught survey vessel will be operated during the works to monitor the progress of the dredging operations. Survey operations will mainly consist of bathymetric soundings, using conventional single-beam (dual frequency) echo-sounders.

All surveys will be carried out along pre-determined cross lines at 20m intervals with cross check lines every 100m and all the pre-determined lines will be extended in order to cover 50m on either side of the design toe lines.

2.10.5. Pre-and Post-Dredge Surveys

Pre-dredge hydrographic surveys will be performed prior to all dredging works to determine a baseline for the performance of the dredging works. This survey will also determine the total quantity of materials which need to be removed from each dredge area.

Upon completion of each individual dredge area, a post dredge hydrographic survey will be carried out to achieve Practical Completion for each Dredge Area. A complete set of A3 sized “as-dredged” drawings will be submitted for the scope of works.

2.10.6. Topographic Survey

Topographic grid will form 20m interval profiles across the reclamation area, covering all surface variations. Containment bunds will be surveyed in profiles of 20m interval. Reclamation progress will be monitored by topographic survey. A plane laser will be set-up to control the fill to design levels.

2.10.7. Cutter Suction Dredge (Damen Cutter Suction Dredger CSD450)

A Damen CSD450 dredger is proposed to be used for the Project. The dredger and specifications are presented in Figure 7.


Figure 7 Damen Cutter Suction Dredger CSD 450 specifications (DAMEN 2017)

2.10.8. Process Control

The dredging and disposal process is largely controlled by computing software and the vessels positioning system. The dredge software package to be utilised is the DREDGEPACK Dredge Operations Software. This software and hardware package is specifically designed to monitor the exact position and depth of the cutter head and keeps track of the computed “as dredged” surface.

The positioning system will be Differential Global Positioning System, DGPS in combination with a tidal receiver. The output of this positioning system will be X, Y and Z co-ordinates of the vessel. Cutter position is determined relative to the ship by means of an angle transducer, measuring the angle between the cutter ladder and the horizontal. The x, y, and z of the cutter position is calculated by the dredge computer. With this software package and in combination with regular hydrographic surveys it is possible to accurately calculate the quantity of materials moved during a shift. Regular hydrographic surveys will be performed in co-ordination with the Client to check the actual progress of the dredge, which will be used for reporting purposes.

2.11. Onshore Dredge Spoil Disposal Dredge material is proposed to be disposed onshore within the DMMA, which is situated south west of the Beadon Creek Road at the back of the current industrialised area. The DMMA will be prepared by stripping the existing topsoil and stockpiling it at strategic locations surrounding the disposal site(s).

The dredged materials will be transported to the DMMA via a series of pipelines and booster stations as described in Sections 2.6 and Section 2.7. At the DMMA, the discharge lines will be subdivided into branches. The initial discharge pipeline layout will be installed using standard civil plant. The dredged materials will be pumped in a controlled and sequenced manner into the respective sections of the DMMA. Filling will progress from the point of discharge (i.e. the outlet of the dredging discharge pipe). Controlling and managing the filling process will be achieved by monitoring and spreading the fill material using earthmoving equipment

Dredger Specifications

Production Rate: 3,000 m3/h

Dredging Depth: 12 m

Total Installed Power: 941 kW

Total Weight: 115 T

Pipe Diameter: 450 mm


such as bulldozers and hydraulic excavators. After the fines have settled out the dredge water will be tailed to Beadon Creek via a controllable valve.

2.11.1. Dredge Material Disposal Strategy

A Dredge Material Disposal Strategy (DMDS) is to be developed prior to the commencement of construction works. The DMDS will:

• Define various stages of the spoil disposal;

• Include a plan showing the locations, characteristics and dimensions of weirs, culverts and outfalls;

• Consider and describe flow paths through the DMMA and settling basins;

• Describe the layout and utilisation of settling basins to ensure that the Suspended Solids Concentration (SSC) levels are minimised at the outflow location towards the Beadon Creek;

• Provide information on the quantity and characteristics of material to be pumped into the DMMA, including results of geotechnical assessment of the material;

• Address the practical constraints regarding initial perimeter bund construction; and

• Present the modelling outcome to demonstrate how the proposed DMDS will achieve target SSC at the tail water discharge outfall.

Preliminary considerations for the DMDS are described in Section 2.11.2, 2.11.3 and 2.11.4 below.

2.11.2. Bund Design

A bund design will be prepared based on DMMA subsoil stratigraphy and conditions regarding width and height of the bund. The bund design will be checked for geotechnical stability. The stability analyses will include limit equilibrium methods to compute the safety factor of the slopes like the Bishop critical slip circle analysis. The Bishop circular failure calculations are based on moment equilibrium along a circular failure envelope through the slope. For this method, no interslice shear forces are considered. Furthermore, the bund stability will be checked for horizontal/lateral sliding. The resulting safety factors are defined as the ratio between the driving and the resisting forces or moments.

Safety factors will be established as part of the design. Safety factors depend on coverage (planar as well as vertical) of soil information and the type of strength parameter tests performed during the soils investigation.

2.11.3. Design Conditions and Reference Information

Initial Considerations

The DMMA must be designed and operated to provide adequate initial storage capacity and surface area to hold the dredged materials during the filling operations and to retain the suspended solids such that clear water is discharged (USACE, 2015).

Required fill quantities & dredge productions

A total quantity of about 946,450m3 of dredged materials will be discharged into the DMMA. All materials will be dredged by means of a medium Cutter Suction Dredge (CSD) and hydraulically transported towards the DMMA via a combination of floating and shore pipelines and booster stations. The following average productions and discharge levels are envisaged for this CSD:

• Medium CSD production: 500 m3/net operational hour (solids); and

• Medium CSD discharge rate: 1.0 m3/s (total flow).

Productions will be lower in the outer areas of the channel.


Soil characteristics and fines contents

OMSB Stage 1 - Dredge Material Classification

A geotechnical assessment of materials dredged during Stage 1 has been carried out by Galt Geotechnics and is reported via a Technical Memorandum on 30 May 2017. This assessment was used in conjunction with the Stage 2 results presented below to provide a preliminary determination of the dredged soil characteristics for Stage 2 Dredging works.

On the basis of this assessment, the following commentary was made regarding the classification of the soil (GALT Geotechnics 2017a):

Based on the laboratory test results, the proposed material generally meets the requirement for not being classified as unsuitable material under Clause 4.4.3, with the following comments made regarding the material:

• The material is classified as SAND (SP);

• The material does not have significant components of clayey, silty or organic fines (less 5%), and is non plastic;

• The material does not contain particles greater than 75mm;

• The material does not contain deleterious materials (rubbish, debris, vegetable matter, wood and roots); and

• Under compaction the gravel (shells) generally breaks down into sand sized fragments, not clay sized.

The Particle Size Distributions (PSD) of three samples of the sands envisaged to be dredged and placed in the DMMA have been summarized in Figure 2. The D50 of these sands is about 340 μm while the D10 is approximately 150 μm, with approximately 10% of the materials classified as gravel (Galt Geotechnics 2017):

Figure 8 Particle Size Distribution OMSB Stage 1

The PSD results indicate that well over 90% of the material is typically classified as either sand or gravel, with less than 5% of silts (finer than 60 μm).


OMSB Stage 2 - Dredge Material Classification

Classification of Stage 2 dredge material is provided below based on historic geotechnical investigation (CHM2HILL 2014), environmental sediment quality investigations (O2 Marine 2017) and targeted geotechnical investigation (GALT 2017).

The environmental sediment quality investigations undertaken by O2 Marine (2017) provided a summary of the sediment characteristics identified during historic sampling by CHM2HILL (2014) (Table 5) and during the O2 Marine (2017) sediment quality investigation (Table 6). Although it is noted that the O2 Marine (2017) investigation was primarily focussed on surface sediments, with sampling to -1.5 m CD in the berth pocket/turning circle, -1.2 m CD in the inner channel and -1.0 m CD in the outer channel.

Table 5 Geotechnical test results for engineering geological units (CH2MHILL 2014)

Tests Marine/Estuarine

Deposits

Tantabiddi

Member

Upper Onslow

Red Beds

Lower Onslow

Red Beds

Top of horizon +1-0 m CD -1-1.6 m CD -1-4 m CD -6.2-10 m CD

Thickness 2-6.5 m 0-2.4 m 3-6 m Extends below 13 m CD

Moisture (%) 16.1-40.8% N/A 14.5-24% -

TOC (%) <5% N/A - -

PSD Gravel 0-27% N/A 0-39% 0-5%

Sand 41-95% N/A 9-74% 28-55%

Fines 3-45% N/A 14-71% 42-68%

Table 6 Descriptive statistics of sediment PSD from the berth pocket/turning circle, inner channel and outer channel

Area Statistic Clay (%) Silt (%) Sand (%) Gravel (%)

Berth Pocket/ Turning Circle

Sampling Depth (to -1.5 m CD)

Min 0 0 51 0

Max 29 20 97 13

Mean 8.2 5.2 83.5 3.2

SD 11.1 7.6 16.7 5.4

n 6 6 6 6

Inner Channel


Min 0 0 73 0

Max 11 5 99 25

Mean 2.1 1.2 85 11.7

SD 3.4 1.5 9.4 8.5

n 9 9 9 9

Outer Channel


Min 0 0 65 1

Max 9 9 99 25

Mean 3.8 2.8 79.9 13.5

SD 2.5 2.5 10.8 8.1

n 12 12 12 12


Subsequent targeted geotechnical assessment of the dredge material was undertaken by Galt Geotechnics (2017). The GALT (2017) study considered the historic sampling results described above and the results of targeted geotechnical investigation (Boreholes) at 12 locations. A copy of the Geotechnical report is included in Appendix C. The GALT (2017) report concluded the following in regard to the Stage 2 dredge material:

The materials encountered in the boreholes were logged in accordance with AS 1726 (2017) “Geotechnical site investigations” and typically comprised:

Silty SAND and Clayey SAND – fine to coarse grained, some calcareous gravel and cobbles including some to many shells.

The standard states that fines content of these soils ranges from 12% to 35% fines. It must be pointed out that significant core loss occurred and the classification of these soil types was based on the recovery of only a small amount of sample.

In an offshore borehole (BH14) drilled as part of an earlier geotechnical study, conducted in May 2014 by CH2MHILL within Beadon Creek, soils encountered mainly comprised sand with layers of silt, silty sand, clayey sand and clayey silt. Laboratory testing of two selected samples of the more fine-grained samples showed that these samples contained 33% and 37% fines (particles <0.075 mm size).

In a later sediment quality assessment, conducted in March 2017 by O2 Marine, samples were collected using vibro-coring techniques and grab sampling. The sample locations comprised within Beadon Creek, the inner channel and the outer channel. Particle size distribution testing conducted on a total of 40 samples showed the fines contents1 ranged as per below:

• Beadon Creek (9 samples): Range 1-53%; Mean 15%

• Inner Channel (15 Samples): Range 1-22%; Mean 6%

• Outer Channel (16 Samples): Range 1-18%; Mean 10%

The amount of fines visually assessed in this investigation appears to be consistent with those determined in testing conducted in the CH2MHILL (2014) and O2 Marine (2017) studies.

Based on the assessment provided above the fines content is assumed to range between approximately 5 – 15% on average, with occasional isolated pockets of higher fines content (i.e. up to 50%) expected to be encountered within Beadon Creek.

Necessity of Bunds

The natural slope angles of fill after hydraulic placement are usually (very) gentle and for this particular site will be mainly dependent on the placement method and particle size distribution of the fill. The majority of the sand pumped will have a grain size of 0.2mm-2mm and will have a slope of between 1:10 – 1:100 (van ‘t Hoff 2013). By constructing bunds and profiling their slopes to their required stable slope angle it is possible to limit the total area of fill.

Initial perimeter bunds will be constructed around the fill and settling basins. The bunds to be placed prior to hydraulic filling will be constructed from locally available materials from within the DMMA. As the available quantity of this material is scarce, bunds need to be constructed with a minimum amount of material. The bund height is governed by the minimum water level inside the settlement basins (see Section 2.11.4), while the side slopes of the bunds are governed by the geotechnical stability of the bund.

1 Difference in fines content values reported in GALT (2017b), compared with the O2 Marine (2017) summary information for Clay and Silt presented in Table 6 is due to difference in grain size classification, i.e. fine particles <0.075 mm size in GALT (2017b) and <0.06 mm size in O2 Marine (2017).


Intermediate (management) bunds or berms will also be constructed within the confines of the DMMA. These bunds will function to direct the flow of sediment mixture and maximise the settlement regime within the DMMA. These bunds will not need to be engineered bunds and will just be pushed up from within with locally available materials.

2.11.4. DMMA Layout

Staging of the Disposal Process

In order to ensure that the dredged materials are all disposed within the designated DMMA, the area has been divided into three main sections as indicated in figure 3 below.

The eastern part of the DMMA is currently a low-lying area of minimal bearing capacity and not accessible by continuous use of heavy construction equipment. This area is identified as “Area A”. The average height of Area A is between 0.0m AHD and 1.0m AHD. Area B has been identified as an area with sufficient bearing capacity to allow continuous use of heavy construction equipment. Area C is currently used as a settlement area for stormwater run-off from the airport and will be used as the area for settlement of fines from the disposal process.

Figure 9 DMMA layout

In order to provide for a level DMMA ensuring safe access for all equipment throughout the works, the following stages have been envisaged:

Stage 1: Area A Improvement

Initially this area will be filled with approximately 1m of hydraulically placed sand to a level of about 2m AHD to allow access for excavators and bulldozers. An estimated 150,000 m3 of sand will be placed in this phase.

Stage 2: Area A Levelling

After Area A has been improved, the overall level of this area will be raised to about 4m AHD. An estimated 400,000 m3 of sand will be placed in this phase.


Stage 3: Final Filling

In stage 3 the remainder of the DMMA will be filled. About 400,000 m3 is estimated to be placed here and will cover both Area A and Area B.

DMMA Layout for each Phase

The main objective when filling over soft soils is to place the fill in a manner which does not lead to instability and the formation of mud waves and maximises the settlement regime for fines This is particularly important when the fill material is granular and of markedly differing engineering characteristics to the substrate (Bray et al. 1997).

Stage 1

As only a layer of approximately 1m of fill is required in this phase to an approximate level of 2m AHD, an initial bund will be constructed with locally available materials using a LGP Bulldozer (Figure 10).

Figure 10 Dredge Spoil Disposal Stage 1

This bund will only be marginally engineered and will only function as a barrier for the dredged materials. Typical bund dimensions are:

• Crest level: 2.5m AHD

• Approximate crest width: 2.5m

The water levels within the DMMA need to be kept low. Therefore, the water level within the settling basin (Area C) needs to be kept at approximately 1.5m AHD to allow sufficient drainage from Area A. This will be accomplished with a weir-box at the southern end of Area A with flexible overflow. The northern end of Area C will have a management bund in order to reduce the outflow of water and encourage settlement of fines. Most of the fines will be captured in Area C. Sufficient number of intermediate bunds will be constructed in order to increase the length of the sedimentation pathway.

MANAGEMENT BUND (ENVIRONMENTAL MONITORING LOCATION)


Stage 2

The perimeter bund is constructed by utilising previously placed dredged fill material adjacent to the bund where the bund is constructed (Figure 11). Typical bund dimensions are:

• Crest width: 3m; and


During Stage 2 filling, internal DMMA bunds will be constructed by using fill material placed during Stage 1 by LGP bulldozers. The function of these bunds is to maximise settling distance within the DMMA and to guide the tail water through the weir box to Area C.


Stage 3

During the final Stage of the works, the perimeter bund is constructed by borrowing material adjacent to the bund where the bund is constructed on previously placed fill. Typical bund dimensions are:

• Crest width: 5.5m


The final composition of the bund will be as per the engineered design thereof. Sequencing of the fill will follow a similar pattern as for stage 2.

Depending on the total quantity of fines which were not captured within the DMMA it may be necessary to construct a secondary bund from the northern end of the Airport’s runway towards the Eastern bund of the DMMA in order to ensure that all remaining fines are captured within the Settling Basin (Area C) (Figure 12)

The tail water from all Stages of disposal will enter the settlement basin on the far southern end of the DMMA.



Flow paths of the tail water will run across the settling basin from south to north and the tail water will then be drained via the northern bund back to Beadon Creek. To pass this bund, two weir-boxes each with four pipes will be placed within the bund in order to spread the flow path across the width of the northern bund and avoid unnecessary erosion. The over-flow level within the weir boxes will have to be placed at an even level to ensure an evenly distribution of flow.



2x WEIR BOX


Estimated Suspended Solids Concentration of Tail Water

The following assumptions and starting points are adopted in the estimations:

1. 50% of the fines remain within the soil matrix of the fill and hence do not wash out during the

hydraulic filling process; and

2. Fines content of the sands are reported in Section 2.11.3 and are assumed to on average,

range between 5-15%2.

Stage 1

In the first layer it is estimated that approximately 150,000 m3 of sands will be placed in Area A. As the overflow at the weir box is to be kept low in order to quicken the dewatering of Area A, initially the settling basin will be the only area for the settling of fines.

The total quantity of fines during this phase is estimated to be about 7,500m3 of which 50% is assumed to remain within the soil matrix. This means that only about 3,750m3 of fines will settle within the settlement basin. As the settlement area is approximately 68,000m2, this results in an average layer of about 5-6cm which technically does not require a management bund at the northern end of the settlement area. However, as the velocity of the tail water at the weir is relative large, some erosion prevention solution should be adopted. Hence it is therefore good practice to have a management bund at the northern end of Area C from when the works commence.

In the unlikely event that a higher content of fines are detected at the discharge point during stage 1 of the works, additional intermediate bunds will be constructed within Area C, to increase the length of the sedimentation pathway. By placement of intermediate bunds, the sedimentation pathway can be doubled or even tripled if required.

Stage 2

The second stage requires approximately 400,000 m3 of sands. The bunds surrounding the DMMA have now been built in accordance with an engineered design and will be able to hold some excess water. As such the overflow at the weir box can be kept a little higher so that part of Area A will become a settlement area for fines in addition to Area C.

The total quantity of fines during this phase is estimated to be about 20,000m3 (5%1) of which 50% is assumed to remain within the soil matrix and 25% settles at the southern end of the DMMA before it leaves through the weir box. This means that only about 5,000m3 of fines will settle within the settlement basin. This adds another 7-8cm on average to Area C.

Stage 3

Similar to stage 2, the third stage requires another 400,000 m3 of sand. The total quantity of fines during this phase is estimated to be about 20,000m3 (5%1) of which 50% is assumed to remain within the soil matrix and 25% assumed to settle at the southern end of the Reclamation Area before it leaves through the weir box. This means that only about 5,000m3 of fines will settle within the settlement basin. This adds another 7-8cm on average to Area C bring the total of area C to approximately 14 – 16cm.

2 Fines contents estimated based GALT Geotechnics (2017) report provided in Appendix C.


3. Stakeholder Consultation

3.1. Stakeholder consultation In developing this DSDMP, and throughout the environmental approvals process, OMSB has undertaken consultation with a number of key stakeholders, including:

• Beadon Creek Maritime Facility Users, including: o Bhagwan Marine; o Chevron Australia; o Eco Tours and Mackerel Island Group; o Total AMS;

• Department of Biodiversity Conservation and Attractions (DBCA);

• Department of Primary Industries and Regional Development (DPIRD);

• Department of Transport (DoT);

• Department of State Development (DSD);

• Department of Water and Environment Regulation (DWER);

• Discovery Parks;

• Onslow Chamber of Commerce and Industry (OCCI);

• Pilbara Ports Authority (PPA);

• Shire of Ashburton (SoA);

• Thalanyji Aboriginal People; and

• Western Australian Fisheries Industry Council (WAFIC) (i.e. Representing local commercial fishing licence holders).

OMSB has committed to ongoing consultation with these key stakeholders throughout the proposed Stage 2 dredging and onshore spoil disposal activities. Ongoing consultation will include OMSB reporting through the Port of Ashburton Technical Advisory and Consultative Committee (TACC) and this process is described in Section 3.2 below.

3.2. Dredging Technical Advisory and Consultative Committee A TACC was established by PPA for the Port of Ashburton in early 2017 to support the implementation of effective, transparent and timely engagement with stakeholders who may have an interest or be affected by dredging programs within the PPA-managed Port of Ashburton (Located adjacent to the Proposal area).

The TACC meets approximately twice per annum (i.e. April and October) or more frequently as required, such as during dredging campaigns. The TACC typically includes representation from:

• Chevron Australia; • DoEE; • DBCA; • DPIRD; • DoT; • DSD; • DWER; • OCCI; • OMSB; • Onslow Salt; • PPA; and • Buurabalayji Thalanyji Aboriginal Corporation (BTAC).


In addition to the above stakeholders, the Chair may invite specialist consultants to attend meetings and provide input to the TACC on specific issues. Advice may also be sought from specialist consultants through the Chair outside TACC meetings.

The main objective of the TACC is to ensure a transparent process with respect to dredging and disposal of dredged material. The purpose of the TACC is to:

• Keep stakeholders informed on maintenance dredging activities; • To provide continuity of direction and effort for environmental protection matters related to

dredging and ocean disposal of dredged material; • Provide a forum for communication and resolution of any issues that may arise that

stakeholders would like to be addressed; • Assist in establishment of long-term permitting arrangements, including review over

development and implementation of: o Sampling and Analysis Plans; o Long-term Dredge Material Management Plans; and o Other research and monitoring programmes.

• Review on-going management of dredging and ocean disposal activities in accordance with guidelines and permits; and

• Make recommendations as appropriate.

Although not identified as a decision-making authority for the OMSB Stage 2 Proposal, the PPA invited OMSB Pty Ltd to participate as a Member of the TACC during the dredging phase of the OMSB Stage 2 Proposal. The primary aim of engagement through the TACC regarding the OMSB Stage 2 Proposal is to enable open and transparent reporting of environmental performance against the management commitments made within the DSDMP. It is also envisaged that the TACC will offer independent advice to OMSB Pty Ltd regarding effective implementation of the environmental management commitments made within the DSDMP.

Given the TACC is already established in the region, and includes representation from most key stakeholders of the OMSB Stage 2 Project, this opportunity is considered to provide significant confidence to key stakeholders (including DWER), that OMSB Pty Ltd is committed to achieving a high standard of environmental management and performance on the Project.

Further information regarding the role and scope of TACC is provided in the Terms of Reference, which is included in Appendix A.


4. Roles and Responsibilities

The roles and responsibilities for the implementation of the DSDMP are summarised in Table 7.

Table 7 Roles and Responsibilities of Key Personnel

Position Responsibility

Proponent • Overall responsibility for implementation of this DSDMP.

• Overall responsibility for complying with all relevant legislation, standards and

guidelines.

• Ensures dredging activities are conducted in an environment safe for both site

personnel and the public.

• Reports on environmental performance for the project to relevant DMAs (i.e.

DoT – dredging and SoA – Onshore disposal) and to the TACC.

• Responsible for reporting all environmental incidents to relevant DMAs.

Proponent’s Representative (Construction Manager)

• Complies with the requirements of this DSDMP.

• Provides advice on dredging and dredge material management related

environmental issues.

• Oversee implementation of environmental controls, monitoring programs,

inspections, audits and management actions in this DSDMP.

• Completes compliance reporting requirements.

• Responsible for the implementation of the environmental monitoring programs

and inspections.

• Prepares environmental monitoring reports.

• Provides advice with respect to environmental issues as required.

Dredging Contractor • Prepares and implements an environmental management plan in accordance

with the requirements of this DSDMP.

• Implements the management actions of this DSDMP.

• Ensures adequate training of all staff within their area of responsibility.

• Ensures all equipment is adequately maintained and correctly operated.

• Responsible for reporting all environmental incidents to OMSB Environmental

Advisor within 24 hours in accordance with OMSB incident reporting

procedures.

All persons involved in the project.

• Comply with the requirements of this DSDMP.

• Comply with all legal requirements under the approvals documents and

relevant Acts.

• Exercise a Duty of Care to the environment at all times.

• Report all environmental incidents


5. Environmental Factors and Objectives

The environmental factors and objectives to be managed under this DSDMP have been derived from the Statement of Environmental Principles, Factors and Objectives (EPA 2016), which outlines objectives aimed at protecting all environments (Themes) including: Sea, Land, Water, Air and People. In consideration of potential environmental impact pathways associated with the proposed dredging and onshore spoil disposal activities, subsequent project specific Environmental Protection Outcomes (EPOs) and Management Targets (MTs) were derived and these are outlined in Table 8.

Table 8 Potential environmental impacts and associated project specific Environmental Protection Outcomes and Management Targets.

3 EPOs and MTs are to be updated following receipt of ministerial conditions that may be applicable to the project.

Environmental

Factor

EPA Objective Potential Environmental Impact Pathway Environmental Protection Outcome (EPO)3 Management Target Management Measures

THEME: SEA

Benthic

Communities

and Habitats

(BCH)

To protect BCH so that

biological diversity and

ecological integrity are

maintained.

Direct impacts of BCH due to removal of

sediment within the dredge footprint.

Permanent loss of BCH within the Zone of High

Impact (ZoHI).

Dredging operations do not occur

outside the defined dredge footprint.

Table 9

Indirect impacts of benthic communities

and habitats due to increased Total

Suspended Sediment (TSS) levels and

subsequent reduction in available light –

caused by suspended sediments released

into the water column during dredging and

discharge of spoil water.

Indirect irreversible loss of subtidal BCH within

the ZoHI.

Recovery of subtidal BCH within the Zone of

Moderate Impact (ZoMI) worst-case scenario

within 5 years following disturbance.

No detectable impact on subtidal BCH within the

Zone of Influence (ZoI) worst-case scenario.

* Note – Extent of ZoMI and ZoI varies

depending on the season in which dredging is

conducted. Refer to Figure 15 (Winter), Figure 16

(Transitional) and Figure 17 (Summer).

Recovery of subtidal BCH within the ZoMI

worst-case scenario within 3 years

following disturbance.

No detectable impact on subtidal BCH

within the Zone of Influence (ZoI) best-

case scenario.

* Note – Extent of ZoMI and ZoI varies

depending on the season in which

dredging is conducted. Refer to Figure

15 (Winter), Figure 16 (Transitional) and

Figure 17 (Summer).


Turbidity impacts on benthic habitats

resulting from tail water discharge

operations.

Manage water quality to achieve a Moderate

Level of Ecological Protection at the DMMA Tail

water discharge.

Manage water quality to achieve a High

Level of Ecological Protection at the

DMMA Tail water discharge.

Coastal

Processes

To maintain the geophysical

processes that shape coastal

morphology so that the

environmental values of the

coast are protected.

Changes to hydrodynamics and coastal

morphology resulting in indirect

modification of intertidal communities.

Dredging operations do not occur outside the

defined dredge footprint.

Dredging operations do not occur

outside the defined dredge footprint.

Table 10

Marine

Environmental

Quality

To maintain the quality of

water, sediment and biota so

that environmental values are

protected.

Disturbance of contaminants in sediments

during dredging and tail water discharger

has the potential to deteriorate water

quality and contaminate marine organisms.

Post-development marine environmental quality to achieve the requirements of the EQP for Beadon Creek. (Refer to Appendix B)

Maintain water quality to meet:

• A High Level of Ecological Protection at the tail water discharge (Weir box) and in the western tributary of Beadon Creek (BCW); and

• A High Level of Ecological Protection in the eastern tributary of Beadon Creek

Table 11

Changes to the physico-chemical

properties of the water column as a result

of dredging and tail water discharge.

There is potential for a hydrocarbon

release into the marine environment from

a vessel spill and or bunkering operations.

Manage vessel bunkering, chemical

storage and spill response to ensure no

adverse impacts to the marine

environment.

Changes to water quality in the vicinity of

the Onslow Salt Seawater intake has the

potential to result in adverse impacts upon

Onslow Salt’s operations.

Maintain water quality to meet industrial

water supply criteria for Onslow Salt’s

seawater intake.

Marine Fauna To protect marine fauna so

that biological diversity and


maintained.

Turbidity impacts on marine fauna. No harm of individuals and/or declines in the

population of the range of species protected

under state legislation.

No reductions in populations of species of local

and regional importance.

No reported incidences of marine fauna

injury or death as a result of turbidity

impacts.

Table 12

Injury or death of marine fauna as a result

of dredge operations.


injury or death as a result of dredge

operations.


Injury or death of marine fauna due to

vessel movement (strike).

No impacts to species or groups of species that

fulfil critical ecological functions within the

system.

No loss or impact to critical marine fauna

habitat, including nesting beaches, nursery

areas, specific foraging or breeding areas and

fish spawning aggregation areas.

No reduction in the biodiversity of marine fauna

in the area.


injury or death as a result of vessel strike.

Introduced Marine Pests (IMP)

translocation from construction or

operational vessels.

No introduction and/or spread of invasive

marine species or diseases.

Minimise the risk of IMP translocation to

protect biological diversity and integrity.

THEME: LAND

Flora &

Vegetation

To protect flora and vegetation

so that biological diversity and


maintained.

Vegetation removal or disturbance for the

pipeline route and/or spoil disposal site.

Direct removal of a maximum of up to 15.8 ha of

native vegetation.

No unauthorised vegetation clearing. Table 13

No impact on conservation significant flora

species.

No impact on conservation significant

flora species.

Translocation of weeds to adjacent areas. Minimise the potential for translocation

of weeds.

Terrestrial

Environmental

Quality

To maintain the quality of land

and soils so that

environmental values are

protected.

Disposal of marine based ASS at spoil

disposal site.

Assess and manage marine sediment ASS to

maintain the quality of land and soil.

Assess and manage marine sediment ASS

to maintain the quality of land and soil.

Table 14

Disturbance of existing ASS at the

proposed disposal site.

Assess and manage land based ASS to maintain

the quality of land and soil.

Assess and manage land based ASS to

maintain the quality of land and soil.

Terrestrial

Fauna

To protect terrestrial fauna so

that biological diversity and

Removal/smothering of terrestrial fauna

habitat.

No unauthorised vegetation clearing. No unauthorised vegetation clearing. Table 15



maintained. Disturbance of conservation significant

terrestrial fauna.

No impact on conservation significant fauna

species.

Disturbance to the foraging and feeding

habitats of migratory birds

No impact on migratory bird habitats. Manage dredge and construction

operations to minimise disturbance of

migratory bird foraging and feeding

habitats.

Attraction of migratory birds to spoil

disposal site due to ponding water.

Manage site conditions to minimise the

potential for migratory birds to gather in

the spoil disposal site.

THEME: WATER

Hydrological

Processes

To maintain the hydrological

regimes of groundwater and

surface water so that


protected.

Altered surface water runoff patterns. Manage construction works and water

discharge to maintain surface runoff

patterns.

Table 16

THEME: AIR

Air Quality To maintain air quality and

minimise emissions so that


protected.

Dust generation from stockpiles. Impacts from dust are confined to the project

development areas.

Manage construction works to minimise

impact on air quality.

Table 17

THEME: PEOPLE

Social

Surrounds

To protect social surroundings

from significant harm.

Disturbance of a significant aboriginal

heritage site.

No disturbance of any aboriginal heritage site. Site boundaries and construction works

will be managed to protect social

surroundings form significant harm.

Table 18


6. Management

The potential environmental impacts identified above in Table 8, have been assigned monitoring and management actions to measure compliance against the EPOs4 and MTs. Management measures for each environmental factor (EPA, 2016) are detailed below.

6.1. Benthic Communities and Habitats Management proposed to minimise potential impacts on the environmental factor ‘Benthic Communities and Habitat’ are described in Table 9.

Table 9 Management actions to minimise impacts on Benthic Communities and Habitats.

Environmental Factor Benthic Communities and Habitats

Activity Dredging and tail water discharge.

Potential Impacts Direct loss of benthic communities and habitats due to dredging activities.

Indirect loss of benthic communities and habitats due to increased Total Suspended Sediment (TSS) levels and subsequent reduction in available light – caused by suspended sediments released into the water column during dredging and discharge of spoil water.

Management Targets Management Actions Environmental Performance

Item Actions Responsibility Reporting/Evidence Timing Contingency

Dredging operations do not occur outside the defined dredge footprint.

9.1 Undertake a HAZID risk assessment to identify potential impacts on benthic communities and habitats.

Proponent • Assessment included in referral support document.

• Prior to commencement of dredging.

• N/A - Completed

9.2 Utilise a satellite-based vessel monitoring system on the dredge to ensure no dredging occurs outside the planned area.

Contractor • Inspection of satellite-based vessel monitoring system,

• Dredge progress reports submitted to the proponent throughout dredging.

• Prior to and during dredge operations.

• Weekly throughout dredging

• Cessation of dredging and relocation of dredge; and

• Maintenance of tracking system.

9.3 Verify calibration of the hydrographic survey systems onboard the dredge.

Contractor • Provide calibration documentation.


• Dredging to commence only after calibration certification for survey equipment is verified.

4 EPOs identified in Table 8 are not presented in the following tables as it is assumed that if the MT is achieved then the corresponding EPO will also be achieved.


Recovery of subtidal BCH

within the ZoMI worst-

case scenario within 3

years following

disturbance.

No detectable impact on

subtidal BCH within the

Zone of Influence (ZoI)

best-case scenario.

Note – Extent of ZoMI and ZoI varies depending on the season in which dredging is conducted. Refer to Figure 15 (Winter), Figure 16 (Transitional) and Figure 17 (Summer).

9.4 Implement the Marine Water Quality Monitoring Program (MWQMP) described in Section 8.1.

Proponent • Telemetered monitoring data (light)

• Daily MODIS imagery (Plume extent)

• MWQMP monthly reports and final report.

• Commence at least eight weeks prior to starting dredging in the HAC offshore area and continue until at least two weeks following completion of dredging.

• Implement Tiered Management Framework (TMF) as described in Section 8.1.3

9.5 Undertake pre-and post-dredging seagrass surveys to confirm presence/absence of seagrass within the ZoMI and ZoI.

Seagrass surveys should include use of towed video survey techniques to cover the spatial area of the ZoMI and ZoI, with confirmation diving inspections to be undertaken at locations where seagrass is detected. Final survey methods should be discussed and agreed with the TACC prior to undertaking the initial pre-dredging survey.

Proponent • Pre-dredging seagrass survey report

• Post-dredging seagrass survey report

• Pre-dredging survey at least one month prior to commencement of dredging in the HAC offshore area.

• (If seagrass detected in pre-dredge survey then undertake post-dredging survey within 1 year following completion of dredging.

• Continue post-dredging surveys on an annual basis (Maximum of five years) as required to identify evidence of seagrass recovery within the predicted ZoMI.

• Where seagrass has not shown evidence of recovery within the ZoMI after 3 years, consider options for manual planting or translocation of material to promote meadow establishment.

9.5 Visual monitoring of dredge related plumes to ensure they do not extend beyond the predicted ZoMI for more than three consecutive days.

Contractor • Completed plume sketch proforma

• Daily during dredging.

• Slow or adapt dredge operations to minimise turbidity outputs

9.6 Undertake inspection and maintenance of erosion, sediment control and drainage structures particularly following heavy or prolonged rainfall.

Contractor • Site ES&H inspection checklist • Daily • Investigate reasons for erosion or drainage damage and adopt management measures (e.g. manage tail water flow rates).

9.7 Ensure no unplanned alterations are made to existing on-site drainage infrastructure that could lead to potential water quality impacts off site.

Contractor • Site ES&H inspection checklist • For the duration of tail water discharge.

• Investigate reasons for erosion or drainage damage and adopt management measures (e.g. manage tail water flow rates).


9.8 Install scour protection measures such as gabions where scouring is likely to occur.

Contractor • Site ES&H inspection checklist • For the duration of dredging.

• Investigate reasons for erosion or drainage damage and adopt management measures (e.g. manage tail water flow rates).

9.9 Use suitable dredging plant and equipment to minimise turbidity, including well maintained floating pipelines to minimise leakage of turbid water during pumping of material to the DMMA.

Contractor • Pre-mobilisation equipment checklist

• Equipment maintenance schedule/documentation


• Dredge operations not to commence prior to document approval.




9.10 Implement the Discharge Water Quality Monitoring Program (DWQMP) described in Section 8.2.

Proponent • Telemetered monitoring data

• Monthly reporting

• For the duration of DMMA tail water discharge.

• Implement TMF as described in Section 8.2.3.


6.2. Coastal Processes Management proposed to minimise potential impacts on the environmental factor ‘Coastal Processes’ are described in Table 10.

Table 10 Management actions to minimise impacts on Coastal Processes.

Environmental Factor Coastal Processes

Activity Dredging

Potential Impacts Dredge activities have the potential to modify coastal morphologies and hydrodynamics.



Dredging operations do not occur outside the defined dredge footprint.

10.1 Undertake a HAZID risk assessment to identify potential impacts on hydrodynamics and coastal morphology.



• Completed.


Contractor • Inspection of satellite-based vessel monitoring system,

• Dredge progress reports submitted to the proponent throughout dredging.





10.3 Verify calibration of the hydrographic survey systems onboard the dredge.

Contractor • Provide calibration documentation.


• Dredging to commence only after calibration certification for survey equipment is verified.


6.3. Marine Environmental Quality Management proposed to minimise potential impacts on the environmental factor ‘Marine Environmental Quality’ are described in Table 11.

Table 11 Management actions to minimise impacts on Marine Environmental Quality.

Environmental Factor Marine Environmental Quality

Activity Dredging and tail water discharge

Potential Impacts Water quality (physico-chemical and contamination) in the marine environment and Beadon Creek may be adversely impacted by dredge operations and tail water discharge.






11.1 Undertake a sediment contamination investigation prior to dredge operations.



• Completed

11.2 Implement the DWQMP described in Section 8.2. Proponent • Telemetered monitoring data




11.3 Conduct inspections of all dredge equipment and pipelines including land based) to check for leaks or damage.

Contractor • Vessel and Site ES&H inspection checklist

• Daily throughout dredging

• Cease discharge if significant spillage or damage noted;

• Activate spill response actions (control drainage, clean up) as required; and

• Implement recommendations from incident investigations.

Manage vessel bunkering, chemical storage and spill response to ensure no adverse impacts to the marine environment.

11.4 Develop a bunkering procedural document. Contractor • Vessel management procedure


• Dredge operations not to commence prior to development and approval of vessel management procedures.


11.5 Undertake vessel maintenance and bunkering in accordance with dredging contractors approved vessel management systems.

Contractor • Vessel management procedure

• For the duration of dredging.

• Vessel management systems to be reviewed and refined (if required) in the event of an identified procedural breach or hydrocarbon spill.

11.6 Industry standard hydrocarbon management practices including implementation of SOPEP to be implemented

Contractor • Vessel management procedure



11.7 All equipment shall be designed and operated to prevent spills and leaks through the provision of in-built safeguards including, but not limited to, relief valves, overflow protection, and automatic and manual shut-down systems.


• Vessel management procedure

• Weekly inspection checklist.


• Rectify any equipment that is damaged or missing as soon as practicable.


11.8 Hydrocarbons (including hydrocarbon wastes) shall be stored in accordance with AS1940-2004.


• Vessel management procedure

• Weekly inspection checklist.


• Rectify any hydrocarbons or waste that are not stored correctly as soon as practicable.


11.9 The proponent is to be notified immediately in the event of a hydrocarbon spill of any volume.

Contractor • Verbal communication

• Immediately after the event (as soon as it is safe to do so).

• Dredge operations to cease until spill investigation is complete, and or Proponent has given authority to proceed.


11.10 An incident report is to be submitted in the event of a hydrocarbon spill of any volume.

Contractor • Incident report • Within 24 hours of the incident.

• Dredge operations to cease until spill investigation is complete, and or Proponent has given authority to proceed.

11.12 Store and segregate chemicals as directed on labels and maintain MSDS for each chemical.



• Any item not compliant during inspection will be rectified prior to follow up inspection (typically one week).

11.13 Provide and maintain spill response equipment adequate for the size of vessel and activity.

Contractor • Vessel ES&H inspection checklist


• Any item not compliant during inspection will be rectified prior to follow up inspection (typically one week).

Maintain water quality to meet industrial water supply criteria for Onslow Salt’s seawater intake






6.4. Marine Fauna Management proposed to minimise potential impacts on the environmental factor ‘Marina Fauna’ are described in Table 12.

Table 12 Management actions to minimise impacts on Marine Fauna.

Environmental Factor Marine Fauna

Activity Dredge and tail water discharge

Potential Impacts Marine fauna may be disturbed, injured or killed by dredge related activities.



No reported incidences of marine fauna injury or death as a result of turbidity impacts.

12.1 Visual monitoring of dredge related plumes to ensure they do not extend beyond the predicted ZoMI and ZoHI* for more than three consecutive days.

* Dredge Plume Visual Monitoring Proforma to be provided by Proponent.

Contractor • Plume sketch proforma • Daily during dredging.

• Slow or adapt dredge operations to minimise turbidity outputs

12.2 Implement the MWQMP described in Section 8.1. Proponent • Telemetered monitoring data (light)

• Daily MODIS imagery (Plume extent)

• MWQMP monthly reports and final report.

• Commence at least eight weeks prior to starting dredging in the HAC offshore area and continue until at least two weeks following completion of dredging.

• Implement TWQMF as described in Section 8.1.3.


• Monthly contaminant sampling




No reported incidences of marine fauna injury or

12.4 Implement a soft start procedure prior to activating cutter head operations.

Contractor • Daily dredge logs. • Each occasion, prior to activating cutter head.

• Dredge operations not to commence unless a soft start procedure has been implemented.


death as a result of dredge operations.

12.5 All project vessels are to have at least one crew member trained as a Marine Fauna Observer (MFO) on board at all times.

Contractor • Training certificate. • Prior to commencement of dredging.

• Dredge operations not to commence unless at least one crew member is a trained MFO.

12.6 MFO logs to be complete during all dredge operations. Contractor • MFO logs. • Daily whilst dredge operations are occurring.

• Investigate why MFO logs were not complete, and ensure adequate staff and resources are in place to fulfil requirement.

12.7 Dredge operations are to cease if marine mega fauna (whale, dugong, sawfish or turtle) are observed within 100 m of the dredge vessel.

Contractor • MFO logs,

• Daily dredge logs.


• Investigate why dredge operations were not ceased and apply required correction actions.

12.8 Incident report to be complete if any marine mega fauna (whale, dugong, sawfish, turtle or dolphin) remains are observed within the spoil disposal site.

Contractor • Site ES&H inspection checklist.

• As required. • Investigate fauna death and apply required corrective actions and or modifications to dredge operations.

No reported incidences of marine fauna injury or death as a result of vessel strike.

12.9 All vessels to operate at a speed under 10 knots at all times during the project.

Contractor • Vessel GPS monitoring system

• DoT harbour master regulation and monitoring.

• Continuous throughout vessel operations.

• Investigate why vessel was recorded in excess for the defined speed limit and amend vessel operations and activities as appropriate.

12.10 All project vessels are to have at least one crew member trained as a MFO on board at all times.

Contractor • Training certificate. • Prior to commencement of dredging.

• Dredge operations not to commence unless at least one crew member is a trained MFO.

Manage vessel activities to prevent the introduction of Introduced Marine Pests into and within State waters.

12.11 All relevant vessels should comply with Commonwealth Department of Agriculture and Water Resources – Australian Ballast Water Management Requirements, the National Biofouling Management Guidelines for commercial vessels.

Contractor • Vessel management procedures.

• Prior to dredge entering Australian Waters or moving from one Australian port to the Port of Ashburton.

• Vessel are not to mobilise to Onslow without approved IMP documentation.


12.11 All vessels that mobilise to the Port of Onslow to undertake / support dredging are required to complete the WA DoF’s ‘Vessel Check’ risk assessment (https://vesselcheck.fish.wa.gov.au)

Contractor • A copy of the Vessel Check report is to be submitted to PPA for assessment along with any supporting documentation including antifoul certificates and inspection reports.

• Prior to dredge entering Australian Waters or moving from one Australian port to the Port of Ashburton.

• Vessel are not to mobilise to Onslow without approved IMP documentation.


6.5. Flora and Vegetation Management proposed to minimise potential impacts on the environmental factor ‘Flora and Vegetation’ are described in Table 13.

Table 13 Management actions to minimise impacts on Flora and Vegetation

Environmental Factor Flora and Vegetation

Activity Construction of spoil disposal site and pipe corridor.

Potential Impacts There is potential to impact natural flora and vegetation when constructing the spoil disposal site and dredge pipe corridor.



No unauthorised vegetation clearing.

13.1 Demarcate approved clearing area prior to commencing any construction works.

Contractor • Site ES&H checklist

• Photographic record

• Prior to clearing activities.

• Flora and vegetation clearing not to commence prior to clear demarcation of approved clearing area.

13.2 Undertake inspection to ensure no flora or vegetation outside the approved permit is cleared or damaged.

Contractor • Site ES&H checklist • Throughout construction


• Report damage or clearing of any flora or vegetation outside the approved area to the Proponent.

• Proponent to report any unapproved clearing to DWER.

13.3 Develop and maintain a weed register

Contractor • Weed register • Prior to clearing.

• N/A

Minimise the potential for translocation of weeds

13.4 Undertake weed inspections Contractor • Site ES&H checklist • Prior to clearing and monthly during construction

• Implement appropriate weed control measures as required.

13.5 Include identification of environmental weeds on site induction process.

Contractor • Staff and Contractor inductions

• As required. • Update inductions as required.


No impact on conservation significant flora species

13.6 Clear demarcation of the known location of the Priority 3 species Stackhousia clementii, with an appropriate buffer and signage along the Samphire Shrubland – Beach vegetation type in which the species is present.

Location and photo of individual plant in the Project area is provided in Figure 13.





13.7 Include information of conservation significant flora species and habitat in the site induction process.

Contractor • Staff and Contractor inductions

• As required. • Update inductions as required.

Figure 13 Location of the Priority 3 Species, Stackhousia clementii, located adjacent to the pipeline route corridor

P3 Location

Latitude: 21.654105

Longitude: 115.121764


6.6. Terrestrial Environmental Quality Management proposed to minimise potential impacts on the environmental factor ‘Terrestrial Environmental Quality’ are described in Table 14.

Table 14 Management actions to minimise impacts on Terrestrial Environmental Quality.

Environmental Factor Terrestrial Environmental Quality

Activity Disposal of dredge sediments, and disturbance of existing land based soils.

Potential Impacts Potential transportation and accumulation of contaminants in dredge spoil which may impact terrestrial environmental quality.

Disposal of ASS from dredge sediments, and disturbance of existing ASS at the disposal site.



Assess and manage marine sediment ASS to maintain the quality of land and soil.

14.1 Undertake a sediment investigation to investigate Potential Acid Sulfate Soils (PASS) in dredge sediment.


• Completed • Completed - N/A

14.2 Prepare an Acid Sulfate Soil Management Plan (ASSMP). Contractor • ASSMP

• Prior to construction works.

• Dredge operations not to commence prior to an approved ASSMP.

• ASSMP to be reviewed and approved by relevant DMA.





Assess and manage land based ASS to maintain the quality of land and soil.

14.4 Undertake a soil investigation to investigate PASS at the DMMA.

Contractor • ASSMP

• Prior to disturbance for construction of DMMA

• Land based earth works not to commence prior to client approval of HAZID.

14.5 Prepare an Acid Sulfate Soil Management Plan (ASSMP). Contractor • ASSMP

• Prior to construction works.

• Land based earth works not to commence prior to an approved ASSMP.


6.7. Terrestrial Fauna Management proposed to minimise potential impacts on the environmental factor ‘Terrestrial Fauna’ are described in Table 15.

Table 15 Management actions to minimise impacts on Terrestrial Fauna.

Environmental Factor Terrestrial Fauna

Activity Flora and vegetation clearing and construction activities

Potential Impacts Fauna habitats may be damaged or removed as a result of vegetation clearing.

Construction equipment used outside site boundary may impact fauna.



No unauthorised vegetation clearing.

15.1 Demarcate approved clearing area prior to commencing any construction works.





15.2 Undertake a pre-clearance fauna/spotter catcher survey. Proponent • Pre-clearance fauna/spotter catcher survey.


• Flora and vegetation clearing not to commence prior to a pre-clearance fauna/spotter catcher survey.

15.3 All vehicles and plant are to remain within the defined site boundaries.

Contractor and Proponent

• Appropriate boundary signage and barriers,

• Site ES&H inspection checklist

• Throughout construction

• Site boundaries are to be clear and visible, and rectified if required.

Manage dredge and construction operations to minimise disturbance of migratory bird foraging and feeding habitats.


Contractor • Inspection of satellite-based vessel monitoring system.

• Dredge progress reports submitted to the proponent.






15.5 All vehicles and plant are to remain within the defined site boundaries.

Contractor and Proponent

• Appropriate boundary signage and barriers,

• Site ES&H inspection checklist


• Site boundaries are to be clear and visible, and rectified if required.

15.6 Project lighting spill will be minimised where practicable. (lighting direction, duration and level).



• Investigate alternative ways in which lighting spill can be minimised on site.

Manage site conditions to minimise the potential for migratory birds to gather in the spoil disposal site.

15.7 Monitor the level of bird aggregation in spoil disposal site. Contractor • Site ES&H inspection checklist.

• Daily throughout construction

• Implement Item 12.8 as required.

15.8 If required, deterrents such as bunting, tape, sirens, scare guns, mock hawks, or bio-acoustics (natural predator and distress calls) can be used to deter birds from aggregating in spoil disposal site.

Contractor • Visual or audio deterrent equipment,

• Site ES&H inspection checklist.


• Investigate alternative ways in which bird life could be deterred from aggregating on spoil disposal site.


6.8. Hydrological Processes Management proposed to minimise potential impacts on the environmental factor ‘Hydrological Processes’ are described in Table 16.

Table 16 Management actions to minimise impacts on Hydrological Processes.

Environmental Factor Hydrological Processes

Activity Land based construction activities

Potential Impacts Surface water drainage patterns (excluding the spoil disposal area) may be altered by construction activities.



Manage construction works and water discharge to maintain surface runoff patterns.

16.1 Tail water discharge activities are not to significantly disrupt natural drainage patterns (excluding the proposed spoil disposal area).



• If significant changes to surface runoff patterns are observed, an investigation is to be undertaken to identify possible corrective actions (e.g. modify tail water discharge rates).

16.2 Install a control valve where tail water is to be released, so that flow rates can be modified.


• Prior to tail water discharge

• Tail water is not to be discharged prior to installation of a control valve in the DMMA.

16.3 Construction activities and earth works are not to significantly disrupt natural drainage patterns (excluding the proposed spoil disposal area).



• Corrective actions to restore natural drainage patters will be implemented in the event of unplanned disturbance.


6.9. Air Quality Management proposed to minimise potential impacts on the environmental factor ‘Air Quality’ are described in Table 17.

Table 17 Management actions to minimise impacts on Air Quality.

Environmental Factor Air Quality

Activity Construction activities

Potential Impacts Construction works have the potential to create dust, impacting the town of Onslow.



Manage construction works to minimise impact on air quality.

17.1 Dust suppression will be implemented to reduce impacts of general construction works (e.g. water trucks).


• Daily throughout construction.

• Additional suppression efforts or methods are to be implemented if dust levels are reported to be impacting the town of Onslow or Onslow Airport.

17.2 Appropriate dust suppression (e.g. seeded hydromulch or topsoil) will be implemented within the spoil disposal area once tail water has drained away.

Contractor • Site ES&H inspection checklist

• Daily once tail water has drained away.

• If dust levels persist after initial suppression efforts, alternative method for suppression will be investigated


6.10. Social Surrounds Management proposed to minimise potential impacts on the environmental factor ‘Social Surrounds’ (Aboriginal Heritage) are described in Table 18.

Table 18 Management actions to minimise impacts on Social Surrounds.

Environmental Factor Social Surrounds

Activity Construction works.

Potential Impacts Potential disturbance of a significant Aboriginal Heritage site.



Site boundaries and construction works will be managed to protect social surroundings from significant harm.

18.1 Undertake pre-clearance ethnographic and archaeological surveys for any areas of the disposal site and pipeline route that have not previously been surveyed.

Where required surveys will be undertaken in consultation with the traditional owners.

Proponent • Ethnographic and archaeological survey reports.

• Prior to commencement of dredging and construction works.

• Dredge operations and land based construction works are not to commence prior to Ethnographic and archaeological surveys (if required).

18.2 If survey results determine it is required, prepare and submit a Section 18 referral to the Department of Aboriginal Affairs (DAA).

Proponent • Section 18 referral. • Prior to commencement of dredging and construction works.

• Dredge operations and land based construction works are not to commence prior to the submission of a Section 18 referral to the DAA (if required).

18.3 Liaise with traditional owners and community groups and implement appropriate cultural protocols prior to dredging commencement, to ensure that proper respect is shown to the Warnamankura (mythological water serpent).

Contractor

Proponent

• Stakeholder consultation with traditional owners and local communities.

• Prior to commencement of dredging and construction works.

• Dredge operations and land based construction works are not to commence prior to discussion with traditional owners and local communities.

18.4 Heritage Monitors onsite during clearing and/or land-based ground disturbance works.

Contractor • Daily monitor logs. • During clearing or ground disturbance works (excludes dredging)

• Reporting of any incidents to DAA.


7. Waste Management

The waste management measures identified in Table 19 (applicable to vessels and land based) are aimed at minimising impacts on the marine and terrestrial environment arising from waste discharge and disposal. Daily Vessel and Site ES&H inspections will be undertaken to check that all reasonable and practicable measures are being taken to minimise the generation of waste and its discharge into the environment.

Table 19 Waste management objectives and measures.

Objective Management Measure

Ensure staff, contractors, and subcontractors are aware of responsibilities to appropriately manage waste, including achieving recycling targets.

All personnel are to be appropriately inducted prior to any site works. Waste management plans/procedures to be made available to all personnel.

Appropriately segregate waste. Recycle waste where possible.

Store waste with minimum impact on the environment. Provide sufficient recycling and waste bins on site including offices, crib rooms and vessels.

Store waste in enclosed bins with no exposure to the elements.

Store waste in accordance with Australian Standards, Codes of Practice and relevant legislation.

Avoid large stockpiles of materials on site.

Avoid overloading bins.

Avoid storing waste on site for long periods of time.

Disposal of waste with minimum impacts on the environment. Use appropriate & licensed contractors for waste disposal.

Dispose of waste regularly.


8. Monitoring

8.1. Marine Water Quality Monitoring Program

8.1.1. Monitoring Rationale

The MWQMP should be implemented prior to, during and post dredging of the HAC offshore areas to ensure that the EPOs and MTs for subtidal BCH in this area are achieved. The monitoring approach is based on:

• Real-time telemetered monitoring of light conditions at the seabed within the ZoMI and at the boundary of the ZoI/ZoMI and at nominated reference locations; and

• Twice daily assessment of dredge plume extent based on the MODIS imagery acquisition and analysis of total suspended sediment (TSS) concentration at the surface.

8.1.2. Environmental Protection Outcomes, Management Targets and Trigger Levels

The EPOs, MTs and trigger levels to be applied for protection of subtidal BCH during dredging of the HAC offshore areas (i.e. beyond the training wall) are presented in Table 20.

Trigger levels to achieve the EPOs and MTs were developed in consideration of the latest available information from the WAMSI Dredging Science Node for the protection of seagrass (Halophila sp.) BCH (WAMSI 2017). It is noted that seagrass BCH monitoring is not proposed during dredging5. However, the trigger levels provided in Table 20 involve in-situ measurement of daily light intensity, which has been determined by WAMSI (2017) to provide an appropriate proxy measurement for seagrass health.

Plume extent (i.e. MODIS imagery analysis) should also be used to inform dredge management, however no specific trigger levels are proposed.

5 Table 9, Management action 9.5 requires pre- and post-dredging seagrass surveys to be undertaken to confirm presence/absence of seagrass and subsequently assess the effectiveness of the during-dredging daily light intensity trigger levels in protecting BCH to achieve the EPOs and MTs.


Table 20 Environmental Protection Outcomes, Management Targets and Trigger Levels for protection of BCH from dredging related impacts

Monitoring Locations

ZoMI (East/West) ZoI/ZoMI Boundary (East/West)

Monitoring sites located on ZoI/ZoMI best-case predicted impact boundary

Monitoring sites located on ZoI/ZoMI worst-case predicted impact boundary

Management Target

No Ecological Impact on Seagrass BCH

Trigger Level 1 Early Warning for no ecological impact on seagrass BCH

Trigger Level 2

For any period of 5 or more consecutive days:

- Mean daily light intensity should not be <0.9 mol/m2/day; AND

- Median daily light intensity of an impact site should not be <20th percentile of reference sites.




OR

For any 2-week (14-day) period:

- Mean daily light intensity (calculated as a rolling 2-week average) should be >0.9 mol/m2/day; AND

- Median daily light intensity of an impact site (calculated as rolling 2-week median) should be >20th percentile of reference sites.

Environmental Protection Outcome

Recoverable Impact on Seagrass BCH

Trigger Level 2 No Ecological Impact on Seagrass BCH

Trigger Level 3







OR OR







8.1.3. Tiered Management Framework

A MWQMP Tiered Management Framework (TMF) has been developed based on monitoring and reporting against the three trigger levels presented in Table 20 to ensure EPOs and MTs for protection of seagrass BCH are achieved during dredging of the HAC offshore area. The TMF presented in Figure 14 will be implemented by the Proponent/Contractor.


Figure 14 Marine Water Quality Monitoring Program - Tiered Management Framework


8.1.4. Monitoring Locations & Frequency

The four indicative MWQMP monitoring locations described in Table 21 and presented in Figure 15 (Winter), Figure 16 (Transitional) and Figure 17 (Summer) are proposed to be monitored real-time during dredging of the HAC offshore areas. Monitoring locations are indicative only and are based on the predicted extent of ZoI/ZoMI zones. However, final monitoring locations will be selected based, ideally on where seagrass BCH is observed during the required pre-dredging BCH survey (Refer to Table 9; Management Item 9.5) in close proximity of the indicative monitoring locations (i.e. within 100m of the impact zone boundaries).

Monitoring should commence at least eight weeks prior to starting dredging in the HAC offshore area and continue until at least two weeks following completion of dredging.

Table 21 Indicative MWQMP Monitoring Locations

Site Name Location EPO MT Latitude Longitude

ZoI/ZoMI Boundary - East Impact No Ecological Impact Early Warning TBA – Dependent on season in which dredging is conducted and whether seagrass BCH is detected

during pre-dredging surveys. Indicative monitoring locations are

shown on Figure 15 (Winter), Figure 16 (Transitional) and Figure

17 (Summer).

ZoMI - East Impact Recoverable Impact No Ecological Impact

Ref - East Reference N/A N/A

ZoI/ZoMI Boundary - West Impact No Ecological Impact Early Warning

ZoMI - West Impact Recoverable Impact No Ecological Impact

Ref - West Reference N/A N/A

8.1.5. Parameters and Procedures

Light Intensity

Light quantity and quality6 will be measured every 30 minutes at each of the monitoring locations presented in Table 21. At all locations, light data will be collected using in situ water quality loggers with telemetry capability. Logging systems will be located approximately 0.5 m above the seabed on a steel frame at each specified monitoring location.

Data will be downloaded daily using the telemetry system deployed with the logger. Loggers will be calibrated monthly to ensure accurate datasets are acquired.

Plume Extent (TSS)

Total suspended solids will be measured twice daily via MODIS imagery acquisition and analysis to define plume extent and inform the spatial extent of any exceedance of the light thresholds that are reported at the in-situ impact monitoring locations.

Assessment of TSS plume extent in relation to the designated light thresholds will be based on the pre-existing relationship established for inshore Pilbara waters and presented in Strydom et al. (2017).

Replicate surface water samples should be collected at each monitoring location on a monthly basis during WQMS maintenance to allow for calibration with MODIS imagery analysis.

6 Although light quality information is not required for assessment against EPOs and MTs, light quality measured during dredging provides valuable information for the WAMSI Dredging Science Node to improve the science and understanding of potential impacts to seagrass BCH as a result of decreased light quality during dredging.


Figure 15 Indicative MWQMP Monitoring Locations - Winter


Figure 16 Indicative MWQMP Monitoring Locations - Transitional


Figure 17 Indicative MWQMP Monitoring Locations - Summer


8.1.6. Data analysis

Water quality (light) will be collected continuously (i.e. at least every 30 minutes) throughout monitoring period and will be used to provide early warning of potential water quality deterioration at each of the monitoring sites. The likelihood of a link between dredging and water quality decline will be assessed in terms of the following factors:

• Correct instrument function and operation;

• Locations of and status of dredging activities in relation to the site(s) at the time of the exceedance;

• Hydrodynamic conditions, for example wind, tide, wave and swell state at the time of the exceedance;

• Effects of an extreme weather event in the region; and

• Spatial extent of water quality decline at the time of exceedance based on review of daily plume extent (i.e. MODIS imagery analysis).

8.2. Discharge Water Quality Monitoring Program

8.2.1. Monitoring Rationale

The DWQMP should be implemented prior to, during and post tail water discharge from the DMMA to ensure that the EPOs and MTs for protection of marine environmental quality and intertidal BCH in Beadon Creek are achieved and potential acidification in the DMMA is managed. The monitoring approach is based on:

• Real-time telemetered monitoring of water quality (Turbidity, pH, Salinity, Temperature and Dissolved Oxygen) at:

o One location within the DMMA, prior to discharge (DSC); o One location within the receiving environment, downstream from the discharge location (i.e.

Beadon Creek East - BCW); and o One reference location within Beadon Creek, away from the influence of dredging and

dewatering activities (i.e. Beadon Creek West - BCE). • Weekly sample collection for analysis of Total Titratable Acidity (TTA) within the DMMA prior to

discharge; and

• Monthly water quality sampling for dissolved metals and Tributyltin (TBT) at the DMMA tail water discharge point (DSC)7.

EPOs, MTs and associated trigger levels were developed assuming the potential for a temporary, localised reduction in marine environmental quality in the immediate vicinity of the tail water discharge. Trigger levels were also developed for management of potential acidification in the DMMA.

8.2.2. Environmental Protection Outcomes, Management Targets and Trigger Levels

The EPOs, MTs and trigger levels to be applied for protection of marine environmental quality, intertidal BCH and management of acidification during tail water discharge from the DMMA are presented in Table 22.

8.2.3. Tiered Management Framework

A DWQMP TMF has been developed based on monitoring and reporting against the three trigger levels presented in Table 22 to ensure EPOs and MTs for protection of marine environmental quality and intertidal BCH are achieved during tail water discharge operations from the DMMA to Beadon Creek. The TMF presented in Figure 18 will be implemented by the Proponent/Contractor.

7 Where exceedance is reported at DSC, then monitoring should also commence at other monitoring locations (i.e. BCW and BCE).


Table 22 Environmental Protection Outcomes, Management Targets and Trigger Levels for protection of marine environmental quality and intertidal BCH from potential tail water discharge impacts

Monitoring Locations

DMMA Discharge (DSC) Beadon Creek West (BCW)

Located in at the tail water discharge location prior within the DMMA

Located in the Western Tributary of Beadon Creek

Management Target

High Level of Ecological Protection

Trigger Level 1 High Level of Ecological Protection#

Trigger Level 2

Physico-chemical*

Turbidity: Median <80th percentile of reference

Temperature: Median >20th percentile and <80th percentile of reference

Salinity: Median >20th percentile and <80th percentile of reference

pH: Median >20th percentile and <80th percentile of reference

Dissolved Oxygen = >60% Saturation

Physico-chemical*






Contaminants

Dissolved metals: 99% Species Protection Levels (SPL)

TBT: 99% SPL

Acidification

pH: >6.5

Environmental Protection Outcome

Moderate Level of Ecological Protection

Trigger Level 2 Moderate Level of Ecological Protection^

Trigger Level 3

Physico-chemical*






Physico-chemical*






Contaminants

Dissolved metals: 95% SPL

TBT: 95% SPL

Acidification

pH = >6

TTA = <40 mg/L

* Medians calculated based on a rolling 14-day period. # The Management Target for maintenance of industrial water supply (Table 11;Item 11.4) is considered to be met within a High Level of Ecological Protection. ^ The EPO for a Moderate Level of Ecological Protection at BCW only applies during discharge. The location should return to a High Level of Ecological Protection within one month following cessation of discharge.


Figure 18 Discharge Water Quality Monitoring Program - Tiered Management Framework


8.2.4. Monitoring Locations & Frequency

The three indicative DWQMP monitoring locations described in Table 23 and presented in Figure 19 are proposed to be monitored real-time during tail water discharge operations. Monitoring locations presented in Figure 19 are indicative only and will be subject to safe navigation within Beadon Creek and final discharge location in the DMMA.

Table 23 Indicative DWQMP Monitoring Locations

Site Name Location EPO MT Latitude Longitude

Discharge (DSC) Impact Moderate Level of Ecological Protection


21°39'44.15"S 115° 7'7.22"E

Beadon Creek West (BCW)

Impact Moderate Level of Ecological Protection


21°39'9.20"S 115° 7'40.16"E

Beadon Creek East (BCE)

Reference N/A N/A 21°39'17.47"S 115° 8'10.71"E

Commence discharge water quality monitoring in the receiving environment locations (i.e. BCE & BCW) one month prior to commencement of tail water discharge from the DMMA and continue until at least one month following completion of tail water discharge from the DMMA.

Commence acidification monitoring and surface water sampling for laboratory analysis of TTA, dissolved metals and TBT in the DMMA as soon as sufficient water level is achieved to facilitate monitoring and continue until tail water discharge from the DMMA is completed.


Figure 19 Indicative DWQMP Monitoring Locations

DMMA

Tail Water Discharge Options

BCW

DSC

BCE (Ref)

N


8.2.5. Parameters and Procedures

Physico-chemical parameters

Turbidity, temperature, salinity, pH and dissolved oxygen will be measured every 30 minutes at each of the monitoring locations presented in Table 23. At all locations, water quality data will be collected using in situ water quality loggers with telemetry capability (Water Quality Monitoring Systems - WQMS). In Beadon Creek, each WQMS will be located approximately 0.5 m above the seabed on a steel frame at each specified monitoring location. At the tail water discharge location, the WQMS will be installed to measure water quality immediately prior to (i.e. within 50m) discharge via the weir box.


Dissolved Metals & TBT

Surface water samples will be collected monthly at the tail water discharge monitoring location for laboratory analysis of dissolved metals (As, Cd, Cr, Cu, Pb, Hg, Ni, Se, Zn) and TBT.

Acidification

As part of the physico-chemical monitoring described above, pH will be measured every 30 minutes in the DMMA prior to discharge (i.e. DSC). Water quality data will be collected using in situ water quality loggers with telemetry capability (Water Quality Monitoring Systems - WQMS). At the tail water discharge location, the WQMS will be installed to measure water quality immediately prior to (i.e. within 50m) discharge via the weir box.


Surface water samples will be collected on a weekly basis at the tail water discharge monitoring location for laboratory analysis of Total Titratable Acidity (TTA).

8.2.6. Data analysis

Physico-chemical water quality parameters will be measured continuously throughout monitoring period and will be used to provide early warning of potential water quality deterioration at each of the monitoring sites. The likelihood of a link between tail water discharge and water quality decline in Beadon Creek will be assessed in terms of the following factors:

• Correct instrument function and operation;

• Status of discharging and dredging activities at the time of, and leading up to the exceedance;

• Water quality conditions at the tail water discharge point;

• Hydrodynamic conditions in Beadon Creek, for example wind and tide at the time of the exceedance; and

• Effects of an extreme weather event in the region.


9. Reporting

A summary of the environmental reporting requirements identified within this DSDMP is provided in Table 24.

Table 24 Reporting requirements during dredging and dredge disposal.

Name of Report Content Timeframe Recipient

Plume Sketches Illustration and observation of dredge plume extent. Daily whilst dredge operating. Proponent

Benthic Habitat Pre-dredging Survey Report

Results and discussion of pre-dredge benthic habitat survey. Recommendations for suitable MWQMP monitoring locations.

Prior to commencement of dredging.

Proponent

Benthic Habitat Post-dredging Survey Report

Results and discussion of post-dredge benthic habitat survey. Describe whether or not BCH is present within the predicted ZoMI.

Prior to commencement of dredging.

Proponent

Marine Water Quality Monitoring Report

Monthly summary of light data and MODIS imagery analysis to provide a status of water quality health relative to the EPOs and MTs.

Monthly.

Final report following cessation of dredging the HAC offshore areas.

DoT

SoA

TACC

Discharge Water Quality Monitoring Report

Monthly summary of water quality monitoring data to provide a status of water quality health relative to the EPOs and MTs.

Monthly.

Final report following cessation of tail water discharge.

DoT

SoA

TACC

IMP Risk Assessment Department of Fisheries ‘Vessel check risk assessment’, copy of Vessel Check report, supporting documentation including antifoul certificates and inspection reports.

Statement from lead inspector on marine pest status of the vessel.

Within 72 hours of inspection. DoT

DoF

Vessel Quarantine Report

Checklist of vessel components checked during vessel inspection.

Statement from lead inspector.

Within 14 days of inspection or risk assessment.

DoT

DoF

Incident Report The contractor shall notify the Proponent as soon as possible following an incident.

The Contractor will submit an incident report to the Proponent within 24hrs of the event.

As per the OMSB Incident Management Procedure.

Proponent

Environmental Performance Report

Summary of environmental compliance with the requirements of this DSDMP.

Overview of any environmental incidents (e.g. breach of EPOs or MTs) and management action taken, including the results of any follow-up investigations.

At each TACC meeting. ~TACC Meetings are planned to occur during April and October each year.

DoT

SoA

TACC

9.1. Daily Inspections/Checklists Below is a list of required daily environmental inspection/checklists that are to be submitted to verify ES&H compliance. Note the list below is the minimum requirement, the contractor may wish to undertake addition inspections/checklists to demonstrate compliance.

• Site ES&H inspection – (e.g. dredge pipe integrity, erosion, bund integrity, dust, drainage, site boundaries, waste management).

• Vessel ES&H inspection – (e.g. equipment inspection, navigation equipment systems, speed, MFO personnel, waste management, chemical storage, spill kits).


• Dredge operation log – (e.g. operations times, types of operations, soft start times, gps positioning, dredge volumes).

• MFO Logs – (e.g. dredge operation time, MFO name, fauna species, distance from vessel, management response).


10. Review

This DSDMP should be reviewed on an as required basis. It is considered that review and revision should at least occur in response to the following circumstances:

• To address any conditions imposed by relevant decision-making authorities (i.e. EPA, DoT, SoA);

• New information relating to potential environmental impacts comes to hand;

• Finalisation of Dredge Spoil Disposal Strategy; and

• Significant changes to dredging or spoil disposal methodology.

Upon review of the DSDMP, the document will be revised where appropriate and the revision status of the document will be updated as required.


11. References

BMT Oceanica (2015) Technical Memorandum: Pre-referral meeting for proposed Onslow Marine Support Base. Memorandum issued to the Office of the Environmental Protection Authority on 12th November 2015.

Bray, R.N., Bates, A.D., & Land, J.M. (1997) Dredging: A handbook for Engineers, Second Edition.

EPA (2014) Beadon Creek Capital Dredging and Construction of Land-Backed Wharf. Not Assessed – Public Advice Given. 28 April 2014.

Environmental Protection Authority (EPA) (2016) Statement of Environmental Principles, Factors and Objectives. Environmental Protection Authority. December 2016.

Galt Geotechnics (2017) Technical Memorandum: Geotechnical Assessment of Imported Fill, Proposed Boat Harbour Access Road Upgrade Beadon Creek Road, Onslow.

PIANC (2014) Classification of Soils and Rocks for the Maritime Dredging Process. Report No 144

Strydom, S., McMahon, k., & Lavery, P. (2017) Response of the seagrass Halophila ovalis to altered light quality in a simulated dredge plume. Marine Pollution Bulletin 121 (2017) 233-330

USACE (2015) Dredging and Material Management (EM-1110-2-5025)

Van ‘t Hoff, J. (2013) Hydraulic Fill Manual: For Dredging and Reclamation Works. CRC Press

WAMSI (2017) Theme 5: Seagrasses: Defining Thresholds and Indicators of Primary Producer Response to Dredging Related Pressures – A Synopsis. DRAFT – Unpublished Report supplied by DWER.


Appendix A Port of Ashburton Technical Advisory and Consultative Committee – Terms of Reference

Port of Ashburton - Technical Advisory and Consultative Committee Terms of Reference – Dredging and Dredged Material Disposal A244832

TACC TERMS OF REFERENCE PORT OF ASHBURTON

A463863 Page 2 of 9

TABLE OF CONTENTS 1. CONTEXT .................................................................................................................... 3

2. SCOPE ........................................................................................................................ 3

3. TACC MEMBERSHIP .................................................................................................. 4

4. MEETINGS .................................................................................................................. 5

5. QUORUM ..................................................................................................................... 5

6. AGENDA ...................................................................................................................... 6

7. MINUTES ..................................................................................................................... 6

8. OUT OF SESSION ITEMS ........................................................................................... 6

9. REVIEW OF TERMS OF REFERENCE ....................................................................... 6

10. VERSION CONTROL ................................................................................................... 6

11. SCHEDULE 1 ............................................................................................................... 8

12. SCHEDULE 2 ............................................................................................................... 9


A463863 Page 3 of 9

1. CONTEXT

On 2 December 2016, the Department of the Environment and Energy issued Pilbara Ports Authority (PPA) with a Sea Dumping Permit (SD2016/3282), which commences on 23 March 2017 for a period of five years.

PPA’s Permit allows for the dumping of dredged material derived from maintenance dredging of the shipping channel, turning basins, product loading facility and Materials Off-loading Facility within the Port of Ashburton to approved spoil grounds.

Ongoing stakeholder input is important in the execution of any successful dredging program. PPA is committed to the implementation of effective, transparent and timely engagement and communication with stakeholders interested in or affected by dredging programs within its ports. To achieve this, PPA has established a Technical Advisory and Consultative Committee (TACC) for the Port of Ashburton.

2. SCOPE

The Port of Ashburton TACC will have an interest in all dredging and disposal activities within the port limits and adjacent approved spoil grounds (Figure 1). These activities may include:

• Capital dredging projects;

• Maintenance dredging projects;

• Dredged material placement within approved spoil grounds; and

• Strategic and administrative issues relating to the above, such as long term dredge management plans, spoil ground capacity management and allocation, new spoil ground site selection or other similar issues as they arise.

In accordance with the National Assessment Guidelines for Dredging (2009)1, the intent of the TACC is to:

• Provide continuity of direction and effort in protecting the local environment of the Port of Ashburton in relation to dredging and material placement;

• Aid communication between stakeholders and provide a forum where points of view can be discussed and conflicts resolved;

• Assist in the establishment, as appropriate, of longer term permitting arrangements through activities such as the provision of comments, review of plans and integration of activities;

• Review ongoing management of dredging and dumping activities in accordance with the guidelines and permitting arrangements; and

1 Available at: https://www.environment.gov.au/marine/publications/national-assessment-guidelines-dredging-2009

https://www.environment.gov.au/marine/publications/national-assessment-guidelines-dredging-2009

https://www.environment.gov.au/marine/publications/national-assessment-guidelines-dredging-2009


A463863 Page 4 of 9

• Make recommendations to PPA, State agencies and/or relevant Commonwealth agencies as necessary in relation to the above as appropriate.

The role of the TACC is not to duplicate the responsibilities of existing State or Federal agencies. Further, it is not to duplicate or be a substitute for focused consultative groups established under other legislation or process.

It is to provide a single point of reference for dredging planning and management in the Port of Ashburton, and to facilitate the flow of information from these groups/agencies to and from Port of Ashburton stakeholders.

It is envisaged that the TACC will provide opportunities for:

• Proponents to seek comment on a proposal, such as under the National Assessment Guidelines for Dredging (2009). Comment would be collated by the TACC Chair, conflicts resolved and provided back to the proponent for submission to the Department of the Environment and Energy;

• Members to have input to the forward planning of dredging issues within the port, such as spoil ground utilisation; and

• Combining of resources, such as joint research.

3. TACC MEMBERSHIP

Membership is drawn from relevant Commonwealth, State and local government and non-government organisations with expertise, responsibilities or interest in the dredging in the port. The stakeholders represented on the TACC are:

• Pilbara Ports Authority(Chair)

• Chevron Australia;

• Onslow Salt;

• Onslow Chamber of Commerce and Industry;

• Thalanyji people as Traditional Owners (represented by Buurabalayji Thalanyji Aboriginal Corporation);

• WA Department of Parks and Wildlife;

• WA Department of Fisheries;

• WA Department of Transport;

• WA Department of State Development;

• Commonwealth Department of the Environment and Energy; and

• WA Office of the Environmental Protection Authority.


A463863 Page 5 of 9

PPA typically sends three delegates to TACC meetings, including: Environment and Heritage Manager – West Pilbara (Chair), Harbour Master – Regional Ports, and Dredging Manager. The latter role performs an important function on the TACC, providing specialist advice and information on both planned and completed dredging activities, hydrographic surveys, and metocean equipment installations, as well as status updates on the performance of this equipment.

Current TACC membership and contact details are shown in Schedule 1, which will be updated as required. The principal from the stakeholder organisation will be responsible for circulating material within their respective organisation and providing consolidated feedback as required.

The principal will be responsible for nominating a second and keeping contact details up to date. The Chair will maintain the contacts list in Schedule 1.

In addition to the above stakeholders, the Chair may invite specialist consultants to attend meetings and provide input to the TACC on specific issues. Advice may also be sought from specialist consultants through the Chair outside TACC meetings.

Organisational membership can be changed from time to time as required, either for specific in-port projects, or identified gaps in stakeholder representation. A request will be made through the Chair and considered by the TACC.

Organisations will be responsible for the appropriate selection of a representative on the TACC.

4. MEETINGS

The TACC will meet twice annually, nominally in April and October. Depending on circumstances, additional meetings may be held outside these nominal times.

Pilbara Ports Authority will be responsible for providing secretariat services and meeting facilities.

Meetings will generally be held with video and conference call lines available for those unable to attend in person.

5. QUORUM

A minimum of the Chair (or delegate) and five member stakeholders must attend a meeting to obtain a quorum.

Attendance of a meeting may be in-person or via suitable electronic means.


A463863 Page 6 of 9

6. AGENDA

The Chair will call for agenda items before the proposed meeting. This will advise of the proposed meeting date, time and location.

The Chair will collate agenda items and circulate an agenda before the meeting date. Where an agenda item requires presentation material at the meeting, the Chair will make all attempts to source this material and provide to stakeholders attending the meeting via electronic means prior to the meeting.

7. MINUTES

Minutes of the meeting will be taken on behalf of the Chair or delegate. These will be circulated to all stakeholders post meeting for comment, and finalised before the next meeting.

PPA will be responsible for retaining copies of meeting minutes, and providing these to member stakeholders upon request.

8. OUT OF SESSION ITEMS

Where an issue arises that cannot be dealt with at a meeting, but does not necessitate calling an additional meeting, the Chair may circulate the required material out-of-session by whatever means are appropriate (e-mail, hardcopy).

The Chair will provide the material, allow sufficient time for consideration (nominally two weeks), collate information and then circulate a summary of the responses and, where appropriate, an outcome.

Out of session material will be limited as much as possible, recognising the value of collective discussions via the TACC meetings.

9. REVIEW OF TERMS OF REFERENCE

A review of the Terms of Reference will be undertaken by members of the TACC every 3rd year or as need arises.

10. VERSION CONTROL

A record will be maintained of changes to this document (Schedule 2). Administrative changes will be made as required. Substantive changes will be circulated to the TACC membership for review and acceptance.


A463863 Page 7 of 9


A463863 Page 8 of 9

11. SCHEDULE 1: TACC MEMBERSHIP CONTACT DETAILS

ORGANISATION PRINCIPAL CONTACT SECOND CONTACT

TACC TERMS OF REFERENCE

PORT OF ASHBURTON

A463863 Page 9 of 9

12. SCHEDULE 2: VERSION HISTORY

VERSION NUMBER DATE DESCRIPTION OF CHANGE ADMINISTRATIVE /

SUBSTANTIVE?

OMSB Stage 2: DSDMP Page 73 OMSB Pty Ltd 17WAU-0008 /R1702034

Appendix B Environmental Quality Plan

An existing Environmental Quality Plan (EQP) for Beadon Creek is presented in the Pilbara Coastal Water Quality Consultation Outcomes (DoE, 2006) and shown in Figure A-1 below. Water quality in the High Ecological Protection Area (HEPA) shown in the western tributary of Beadon Creek (Figure A-1), has the potential to be temporarily impacted as a result of dredge tail water discharge to the intertidal area which flows to this tributary. Therefore, discharge water quality from the DMMA is proposed to be monitored during dredging and onshore spoil disposal to achieve:

• A Moderate Level of Ecological Protection at the tail water discharge (Weir box) and at a location to be determined within western tributary of Beadon Creek; and

• A High Level of Ecological Protection in the other upper tributaries of Beadon Creek.

Specific water quality monitoring sites and criteria will be selected and described in the WQMP, which is proposed to be presented to the Port of Ashburton Dredging Technical Advisory and Consultative Committee (TACC) for review and comment.


Figure A-1 Environmental Quality Plan for Onslow (Including Beadon Creek) (DoE, 2006)


Appendix C Stage 2 Geotechnical Investigation (GALT Geotechnics 2017)

J1701177 001 R Rev1

www.galtgeo.com.au 4/15 Walters Drive

OSBORNE PARK WA 6017 T: +61 (8) 6272‐0200 01 November 2017

Report on

BOREHOLE DRILLING

BEADON CREEK CHANNEL

ONSLOW

Submitted to:

Wallbridge Gilbert Aztec Pty Ltd

634 Murray Street

WEST PERTH WA 6005

J1701177 001 R Rev1 01 November 2017

Galt Geotechnics Pty Ltd

www.galtgeo.com.au 4/15 Walters Drive OSBORNE PARK WA 6017

Page | i ABN: 64 625 054 729

TABLE OF CONTENTS

1. Introduction ................................................................................................................................................................ 1

2. background ................................................................................................................................................................. 1

3. Objectives .................................................................................................................................................................... 1

4. Methodology ............................................................................................................................................................... 2

4.1 Drilling Rig ........................................................................................................................................................... 2

4.2 Notice to Mariners .............................................................................................................................................. 2

4.3 Work Vessel ......................................................................................................................................................... 3

4.4 Positioning ........................................................................................................................................................... 3

4.5 Predive Checks .................................................................................................................................................... 3

4.6 Drilling Operations .............................................................................................................................................. 4

4.7 Demobilisation .................................................................................................................................................... 4

5. Borehole and Drill Records .......................................................................................................................................... 4

6. Discussion .................................................................................................................................................................... 4

7. closure ......................................................................................................................................................................... 6

TABLE (WITHIN TEXT)

Table 1: Test Locations ........................................................................................................................................................ 1

TABLE (END OF TEXT)

Table A1: Summary of Drilling Records ............................................................................................................................... 1

DRAWING

WGA Engineering Drawing ‐ APH170162‐SK‐07_B: Borehole Locations

APPENDICES

APPENDIX A: BOREHOLE RECORDS AND PHOTOGRAPHS

APPENDIX B: DRILLING RECORDS

APPENDIX C: UNDERSTANDING YOUR REPORT

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Page | 1 ABN: 64 625 054 729

1. INTRODUCTION

This report presents the results of borehole drilling for the Beadon Creek Channel project in Onslow, Western

Australia. The work was commissioned by Wallbridge Gilbert Aztec Pty Ltd (WGA).

2. BACKGROUND

Beadon Creek is a tidal inlet on the eastern side of the town of Onslow, on the north‐west coast of Western Australia.

The existing Beadon Creek Maritime Facility provides boating support for commercial fishing vessels, charter vessels,

tugs, barges and recreational vessels. We understand that the Department of Transport (DoT) is planning to upgrade

the existing facility to support the growing demand.

The development works will be undertaken by Maritime Constructions Pty Ltd for Onslow Marine Support Base

(OMSB). These works include dredging of a berth pocket and turning basin immediately west of the existing channel.

The dredged material will then be used to create an additional land‐backed wharf area immediately north of the

existing harbour lots. The dredged slurry will be pumped through a pipeline directly to the reclamation area.

3. OBJECTIVES

We understand that Total AMS (TAMS) was engaged by Maritime Constructions to gather geotechnical data to

support the findings of a recent study by the 02 Marine Group. The previous studies included depth probing at

targeted sites which were identified during the marine geophysical investigation (side scan sonar survey) of the inner

and outer approach channels (completed in March 2017).

The main objective of the geotechnical study was to assess subsurface conditions at twelve specified locations,

particularly in relation to proposed dredging activities for the Beadon Creek Channel upgrade. The specified test

locations are shown on WGA engineering drawing ‐ APH170162‐SK‐07_B presented at the end of the text. Test

locations are also presented in Table 1 (Easting and Northing are in MGA94 projection, GDA94 Datum, Zone 50).

Table 1: Test Locations

Drill Site No. Latitude Longitude Easting Northing

DL01 ‐21°36.983' 115°07.505' 305927 7608462

DL02 ‐21°37.296' 115°07.622' 306136 7607888

DL03 ‐21°37.389' 115°07.668' 306217 7607686

DL04 ‐21°37.589' 115°07.757' 306375 7607349

DL05 ‐21°37.884' 115°07.867' 306571 7606807

DL06 ‐21°38.037' 115°07.943' 306707 7606526

DL07 ‐21°38.195' 115°08.009' 306824 7606236

DL08 ‐21°38.381' 115°07.974' 306769 7605893

DL09 ‐21°38.586' 115°07.890' 306628 7605512

DL10 ‐21°38.677' 115°07.934' 306705 7605344

DL11 ‐21°38.663' 115°07.849' 306558 7605369

DL12 & DL12A ‐21°38.692' 115°07.857' 306572 7605315

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4. METHODOLOGY

The drilling programme was carried out using equipment owned and operated by TAMS. The drilling operations

included a subsea drilling rig operated by a diver, with support being provided by personnel and equipment stationed

on a nearby work vessel.

4.1 Drilling Rig

The drilling equipment included a subsea track‐mounted, diamond wire‐line triple tube HQ core sampling unit. The

drill rig and hydraulic power unit (HPU) were contained in a 20‐foot sea container. The unit was mobilised from North

Fremantle to the TAMS Onslow Shore Base. A photograph of the drilling rig is presented in Photograph 1.

TAMS operational personnel followed a specific Safe Work Instruction for the use of the Core Sample Drill Rig (CSDR).

Operational procedures, subsea and topside preparation, equipment operation, maintenance and quality control are

detailed in TAMS‐SWI‐004.

Photograph 1: Drill Rig

4.2 Notice to Mariners

Diving operations within the Port of Onslow requires a Notice to Mariners submitted to DoT and approved by the

Harbour Master of Onslow. This was promulgated one week prior to operations commencing. The WMS and relevant

JSEA were submitted and approved prior to project kick off and Ashburton Marine was notified prior to diving

operations on site.

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As some borehole locations were within the channel of Beadon Creek, vessel interaction and communication was an

integral part of the schedule planning. TAMS contacted local marine operators utilising Beadon Creek to inform them

of intended diving operations and scheduled daily locations.

4.3 Work Vessel

Work vessel support was provided by AMS Boss; a vessel operated by TAMS, see Photograph 2. All project equipment

was mobilised onto the AMS Boss at the TAMS Wharf in Beadon Creek. We understand that the mobilisation of the

dive system on board the “AMS Boss” was in accordance with TAMS Diving Safety Management System (DSMS). The

dive system was pressure tested, calibrated and certified as per AS/NZS2299.1 requirements prior to use at the site.

Photograph 2: AMS Boss

4.4 Positioning

The borehole positioning and surveying was done by TMAS. The reference datums were:

Easting and Northings referring to GDA94 and MGA Zone 50;

Vertical positioning ‐ Lowest Astronomical Tide (LAT).

Each day the work vessel transited from the TAMS Wharf to site. Once close to the borehole position, the master

directed the deck crew to deploy a surface marker on location. The 8 tonne mooring clump weights used to anchor

the vessel were placed forward and aft to secure the vessel. The mooring of the work vessel was arranged so that the

bow was positioned as near as practicable over the intended sampling location. This was to minimise rig movements

and disturbance on seabed, thus reducing in‐water time.

4.5 Predive Checks

We understand that the divers completed pre‐dive checks and standby diver readiness. Diving operations included

TAMS ‐ Lock Out Tag Out procedure. The DoT and Ashburton Marine were advised of diving operations commencing,

the Alpha flag was raised, and the master monitored any SIMOPS in the vicinity.

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4.6 Drilling Operations

After the master and dive supervisor assessed the weather conditions, tide and current, the CSDR was lowered

overboard using the on‐board Hiab crane. The diver entered the water following along the CSDR umbilical. Once in

position, the diver reported on the orientation of the CSDR and confirmed the umbilical was clear. The diver assessed

the seabed for drilling suitability, and stability of the rig during operation. The diver then instructed deck crew to

lower the CSDR to seabed. The diver then tracked the CSDR into position and erected the mast over the sample site in

a vertically upright position. The drilling and sampling then commenced using HQ3 drilling and coring techniques.

Communication between the diver and the on‐board crew, including the geotechnical engineer, was via a microphone

and speakers installed in the diver’s helmet. A video camera mounted on the diver’s helmet was used to send video

to a computer screen mounted in the dive support centre aboard the AMS Boss.

Vision of the drilling operations was available at the on‐board dive centre. Similarly, real time instructions to the

diver/driller were provided from the on‐board dive centre.

4.7 Demobilisation

On completion of the drilling, the equipment was demobilised from the AMS Boss using TAMS Wharf in Beadon Creek.

The drilling equipment was removed from the work vessel and the AMS Boss was secured on TAMS mooring in

Beadon Bay.

5. BOREHOLE AND DRILL RECORDS

Samples were recovered and photographed. Core was only recovered from one of the boreholes, DL12A and was

placed in a core tray, photographed and appropriately packed for transportation.

Borehole records and photographs are presented in Appendix A., Appendix A also includes:

soil descriptions;

explanation of notes, abbreviations, and terms for soil and rock logging; and

a table showing the carbonate rock classification system using the Clark and Walker (1977) approach.

Drill records at borehole locations obtained during the diving/drilling operations are presented in Appendix B. The

drill records show the drilling rates recorded through the full depth of each of the boreholes.

The results of the drilling records have been summarised in Table 1A located at the end of the text.

6. DISCUSSION

Generalised geological mapping has been documented by the Geological Survey of Western Australia in their

1:250 000 Geological Series (1982). The Onslow Sheet is applicable to the site and is published with a set of

explanatory notes. The Onslow Sheet indicates the site is covered with Holocene‐aged surficial deposits associated

with dune, claypan, supratidal and intertidal‐flats.

The surficial soils are shown to be underlain by Tertiary to Quaternary soil and rock. The uppermost of these units has

been referred to in the nearby Wheatstone geotechnical studies as the Ashburton Red Beds. Underlying this, Lower

Tertiary carbonate rocks associated with the Cape Range Formation and Cretaceous glauconitic rocks associated with

either the Toolonga Cacilutite or Gearle Siltstone are indicated on the geological sheet. These carbonate and

glauconitic rocks are not present within the scoped depth of Beadon Creek Channel studies

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Results of the drilling programme indicate that much of the proposed dredge zone will occur within the surficial soils.

Full core recovery was only achieved at DL12A from the depth interval of 4.5 to 6.1 m. In all other boreholes,

significant (>90%) core loss occurred in the surficial soils (i.e. predominantly uncemented materials with localised

calcarenite cobbles/boulders).

The summarised results of the drilling records provided in Table A1, at the end of the text, indicate that the rate of

drilling varied from 22 mm to 1,400 mm per minute but was generally greater than 100 mm per minute. Drillers’

comments indicate that drilling was generally easy with only occasional zones noted as slow drilling.

The materials encountered in the boreholes were logged in accordance with AS 1726 (2017) “Geotechnical site

investigations” and typically comprised:

Silty SAND and Clayey SAND – fine to coarse grained, some calcareous gravel and cobbles including some to

many shells.

The standard states that fines content of these soils ranges from 12% to 35% fines. It must be pointed out that

significant core loss occurred and the classification of these soil types was based on the recovery of only a small

amount of sample.

In an offshore borehole (BH14) drilled as part of an earlier geotechnical study1, conducted in May 2014 by CH2MHILL

within Beadon Creek, soils encountered mainly comprised sand with layers of silt, silty sand, clayey sand and clayey

silt. Laboratory testing of two selected samples of the more fine grained samples showed that these samples

contained 33% and 37% fines (particles <0.075 mm size).

In a later sediment quality assessment, conducted in March 2017 by O2 Marine2, samples were collected using vibro coring techniques and grab sampling. The sample locations comprised within Beadon Creek, the inner channel and the outer channel. Particle size distribution testing conducted on a total of 40 samples showed the fines contents ranged as shown in the following table:

Location Number of Samples Percent Fines

Range Average

Beadon Creek 9 1 to 53 15

Inner Channel 15 1 to 22 6

Outer Channel 16 1 to 18 10

The amount of fines visually assessed in this investigation appears to be consistent with those determined in testing

conducted in the CH2MHILL and O2 Marine studies.

1 CH2MHILL (October 2014), Geotechnical Factual Report, Proposed Fishing Platform and Office, Beadon Creek,

Onslow, Western Australia. 2 O2 Marine (July 2017), Sediment Quality Assessment, Onslow Marine Support Base, Stage 2 Capital Dredging,

report number 1701010.

J1701177 001 R Rev1 01 November 2017



Page | 6 ABN: 64 625 054 729

7. CLOSURE

We draw your attention to Appendix C of this report, “Understanding your Report”. The information provided within

is intended to inform you as to what your realistic expectations of this report should be. This information is provided

not to reduce the level of responsibility accepted by Galt, but to ensure that all parties who rely on this report are

aware of the responsibilities each assumes in so doing.

GALT GEOTECHNICS PTY LTD

Fred Davenport CPEng

Geotechnical Engineer

\\galtgeo.local\OsbornePark\Data\Jobs\2017\J1701177 ‐ WGA SI Onslow\03 Correspondence\J1701177 001 R Rev1.docx

J1701177 001 R Rev1 01 November 2017



Page | 7 ABN: 64 625 054 729

Table A1: Summary of Drilling Records

Borehole Depth Range

Rate of Drilling(mm/minute)

Driller’s Comment Borehole Depth Range

Rate of Drilling (mm/minute)

Driller’s Comment

DL01 0.0 ‐ 3.1 69

DL09

0.0 – 1.7 1700 No resistance on the feed

DL02

0.0 ‐ 1.7 113

Slow drilling 1.75‐2.0 m

1.7 – 3.1 233

1.7 ‐ 3.1 66 3.1 – 4.5 350 No resistance on the feed. Handful of

pebbles 20‐30 mm

3.1 ‐ 3.3 22 4.5 – 5.5 250 Slight resistance on the feed. Small pebbles

20‐30 mm

DL03

0.0 ‐ 0.8 114 5.5 – 5.9 400

0.8 ‐ 1.7 900

DL10

0.0 – 1.7 850 Drilling was slow and choking resistance

on the outer tube which slowed rotation

1.7 ‐ 2.1 80 1.7 – 3.1 88

2.1 ‐ 3.1 59 3.1 – 4.5 200

3.1 ‐ 4.5 200 Easy drilling 4.5 – 5.9 1400

DL04

0.0 ‐ 1.7 31

No core recovered

5.9 – 7.3 140

1.7 – 2.3 60

DL11

0.0 – 1.7 850

2.3 ‐ 2.9 120 1.7 – 3.1 700

2.9 ‐ 3.1 40 3.1 – 4.5 233

3.1 ‐ 4.5 40 4.5 – 5.9 467

DL05

0.0 ‐1.7 567 5.9 – 6.5 200 Slight resistance

1.7 ‐ 3.1 1400 6.5 – 7.3 114 Nil resistance

3.1 ‐ 4.5 467 7.3 – 8.3 166

4.5 ‐ 5.9 End time

not provided 8.3 – 8.7 200

DL06

0.0 ‐ 1.7 1700 Zero resistance. Few small pieces of

coral

DL12A

0.0 – 0.8 160 Slight resistance on the

feed. Recovered core – loose pieces of coral and shell

1.7 ‐ 3.1 350 Very little resistance 0.8 – 1.0 33

3.1 ‐ 3.3 75

Slower rate of penetration. Sandy clay – no hard material

1.0 – 1.7 78

3.3 ‐ 3.5 22 1.7 – 2.3 600

Very little resistance on the feed. No core material recovered.

3.5 ‐ 4.3 50 2.3 – 2.5 100

4.3 ‐ 4.5 50 2.5 – 2.9 133

DL07

0.0 ‐ 1.7 850

Nil resistance on feed

2.9 – 3.1 100

1.7 ‐ 3.1 467 3.1 – 3.7 150 Very little resistance on the feed. 3 small

pebbles recovered within the inner tube.

3.1 ‐ 4.5 400 3.7 – 4.5 160

4.5 ‐ 5.5 500 4.5 – 5.7 75 Slight resistance on the feed. Full core recovered. Indicates

of calcareous sandstone and calcareous claystone. Very weakly

cemented.

5.5 ‐ 5.9 133 5.7 – 5.9 100

DL08

0.0 ‐ 1.7 850

1.7 ‐ 3.1 700

3.1 ‐ 4.5 1400

4.5 ‐ 5.9 1400

5.9 ‐ 7.3 140 Slight resistance on the feed



ABN: 64 625 054 729

Drawing

℄

PREL

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RY IS

SUE

NOT

FOR

CONS

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TION

P:\J

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1701

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When sheet printed full size, the scale bar is 100mm.0 50 100mm

DATE: CHECKED:CHECK PRINT:

C

A1 DRAWING NUMBERSheet No.Job Number Rev.

Design Drawn

634 Murray Street, West PerthWestern Australia 6005

Telephone 08 9336 6528Email [email protected]

REV. DATE DESCRIPTION DRAFT CHKDENG.

SK-07APH170162WB WB

BOREHOLE LOCATIONSCAPITAL DREDGE & NAV AIDSBEADON CREEK, ONSLOWONSLOW MARINE SUPPORT BASE (OMSB)

Drill Site No. Latitude Longitude Easting Northing Seismic Data1 -21°36'58.9923" 115°07'30.2883" 305927.600 7608462.600 No data2 -21°37'17.7339" 115°07'37.3145" 306136.620 7607888.605 Area of rock outcrop3 -21°37'24.3312" 115°07'40.0569" 306217.935 7607686.645 Possible rock4 -21°37'35.3563" 115°07'45.4043" 306375.800 7607349.400 No specific data5 -21°37'53.0486" 115°07'51.9955" 306571.895 7606807.523 End of rock outcrop heading north6 -21°38'02.2441" 115°07'56.5839" 306707.245 7606526.287 Rock outcrop (Extends north)7 -21°38'11.7167" 115°08'00.5223" 306824.000 7606236.300 Rock outcrop (Extends north)8 -21°38'22.8482" 115°07'58.4699" 306769.096 7605893.223 No specific data9 -21°38'35.1731" 115°07'53.4080" 306628.100 7605512.400 Rock outcrop/boulder

10 -21°38'40.6486" 115°07'56.0397" 306705.800 7605344.900 Rock outcrop/boulder11 -21°38'39.7840" 115°07'50.9203" 306558.273 7605369.721 No specific data12 -21°38'41.5363" 115°07'51.3984" 306572.669 7605315.993 No specific data



ABN: 64 625 054 729

Appendix A: Borehole Records and

Photographs

METHOD OF SOIL DESCRIPTIONBOREHOLE AND TEST PIT REPORTSGRAPHIC LOG & UNIFIED SOIL CLASSIFICATION SYSTEM (USCS) SYMBOLSGraphic USCS Graphic USCS

SM

ML

GP MH

GW CL

GC CI

GM CH

SP OL

SW OH

SC Pt

NOTE: Dual classification given for soils with a fines content between 5% and 12%.

SOIL CLASSIFICATION AND INFERRED STRATIGRAPHY

Coarse

Medium

Fine

Coarse

Medium

Fine

SILT

CLAY

Symbol Term

VE Very easy

E Easy

F Firm

H Hard

VH Very hard

Symbol Term Material SymbolDensity

Index (%)

VS Very Soft VL <15

S Soft L 15 to 35

F Firm MD 35 to 65

St Stiff D 65 to 85

VSt Very Stiff VD >85

H Hard

FINES

Symbol

D

M

Soil Name

BOULDERS

COBBLES

GRAVEL

SAND

0.075 to 0.21

0.002 to 0.075

19 to 63

6.7 to 19

2.3 to 6.7

0.6 to 2.36

0.21 to 0.6

PEAT

Organic SILT (high liquid limit)

Organic SILT (low liquid limit)

CLAY (high plasticity)

CLAY (medium plasticity)

100 to 200

>200

Dry

Term

Moist

WetW

Peat

CONSISTENCY

0 to 12 Inorganic

soil

ORGANIC SOILS

Organic soil

12 to 25

25 to 50

Undrained Shear

Strength (kPa)

Soil Name

FILL (various types)

COBBLES / BOULDERS

GRAVEL (poorly graded)

GRAVEL (well graded)

Soil Name

Silty SAND

SILT (low liquid limit)

CLAY (low plasticity)

SILT (high liquid limit)

Clayey GRAVEL

Silty GRAVEL

SAND (poorly graded)

SAND (well graded)

Clayey SAND

Soil descriptions are based on AS1726‐2017. Material properties are assessed in the field by visual/tactile methods in combination with field and

laboratory testing techniques (where used).

NOTE: AS 1726‐2017 defines a fine grained soil where the total dry mass of fine fractions (<0.075 mm particle size) exceeds 35%.

DENSITY

Term

<0.002

PARTICLE SIZE PLASTICITY ‐ MODIFIED CASAGRANDE CHART ‐ AS1726‐2017

CEMENTATIONMOISTURE CONDITIONRESISTANCE TO EXCAVATION

Description

All resistances are

relative to the

selected method of

excavation

Cementation Description

Particle Size (mm)

>200

63 to 200

50 to 1002% to 25%

<2%

Organic Content

% of dry mass

Medium Dense

Dense

Very Dense

Loose

>25%

Very Loose

Soil may be easily

disaggregated by hand

in air or water

Effort is required to

disaggregate the soil

by hand in air or water

Weakly cemented

Moderately cemented

0

10

20

30

40

50

60

0 10 20 30 40 50 60 70 80 90 100

PL

AS

TIC

ITY

IN

DE

X I

p,

%

LIQUID LIMIT WL, %

CH or OH

MH or OHCL or OL

ML or OLCL - ML

A Line

CI or OI

U Line

O:\Administration\Standard Forms and Documents\PMP17 Method of Soil Description‐Rev5

Galt Form PMP17

August 2017

ROCK STRENGTH, WEATHERING AND DEFECTSSTRENGTH

SYMBOL TERM

VL Very Low

L Low

M Medium

H High

VH Very High

EH ExtremelyHigh

WEATHERINGSYMBOL

RS

XW

HW

MW

SW

Fr

DEFECTSTEXTURE / FABRIC

P Parting B Bedding VR Very roughJ Joint La Lamination Ro Rough

SSu Sheared Surface F Foliation Sm SmoothSZ Sheared Zone Cl Cleavage Po PolishedSS Sheared Seam Fl Flow Banding Sl SlickensidedCS Crushed Seam V VeinIS Infilled Seam

WS Extremely Weathered Seam Pl PlanarDI Drilling induced break/fracture Cn Clean Cr Curved

St Stained Un UndulatingVn Veneer St SteppedCt Coating Ir Irregular

CORE DRILLING DETAILSSYMBOL DESCRIPTION DESCRIPTION

TCR Total Core Recovery Top of RunRQD Rock Quality Designation Bottom of Run

Moderately Weathered

Slightly Weathered

Highly Weathered

The whole of the rock material is discoloured, usually by iron staining or bleaching to the extentthat the colour of the original rock is not recognizable. Rock strength is significantlychanged by weathering. Some primary minerals have weathered to clay minerals. Porosity may beincreased by leaching, or may be decreased due to deposition of weathering products in pores.

POINT LOADSTRENGTH

INDEX Is(50) MPaFIELD ASSESSMENT

NOTE: The strength of rock is based on the uniaxial compressive strength (UCS). Where adequate UCS test data is not available,classification of strength may be made on the basis of the point load strength index (Is(50)).

DEFINITIONTERM

UNIAXIALCOMRPESSIVE

STRENGTHMPa

0.6 to 2

2 to 6

6 to 20

20 to 60

Material crumbles under firm blows with sharp end of pick; can bepeeled with a knife; too hard to cut a triaxial sample by hand. Pieces upto 30 mm thick can be broken by finger pressure.Easily scored with a knife; indentations 1 mm to 3 mm show in thespecimen with firm blows of the pick point; has dull sound underhammer. A piece of core 150 mm long by 50 mm diameter may bebroken by hand. Sharp edges of core may be friable and break duringhandling.

more than 10

3 to 10

1 to 3

0.3 to 1

0.1 to 0.3

0.03 to 0.1

SURFACE ROUGHNESSROCK DEFECTS

Readily scored with a knife; a piece of core 150 mm long by 50 mmdiameter can be broken by hand with difficulty.A piece of core 150 mm long by 50 mm diameter cannot be broken byhand but can be broken by a pick with a single blow; rock rings underhammer.Hand specimen breaks with pick after more than one blow; rock ringsunder hammer.Specimen requires many blows with geological pick to break throughintact material; rock rings under hammer.

60 to 200

more than 200

Residual Soil

Rock shows no sign of decomposition of individual minerals or colour changes.NOTE: The term ‘Distinctly Weathered’ may be used where it is not practicable to distinguish between ‘Highly Weathered’ and‘Moderately Weathered’ rock. ‘Distinctly Weathered’ is defined as follows: ‘Rock strength usually changed by weathering. The rock maybe highly discoloured, usually by iron staining. Porosity may be increased by leaching, or may be decreased due to deposition ofweathering products in pores’. There is some change in rock strength.

Fresh

Extremely Weathered

Material is weathered to such an extent that it has soil properties. Mass structure and materialtexture and fabric of original rock are no longer visible, but the soil has not been significantlytransported.Material is weathered to such an extent that it has soil properties. Mass structure and materialtexture and fabric of original rock are still visible.

SYMBOLTORBOR

COATING / INFILLINGSURFACE SHAPE

The whole of the rock material is discoloured, usually by iron staining or bleaching to the extentthat the colour of the original rock is not recognizable, but shows little or no change of strengthfrom fresh rock.Rock is partially discoloured with staining or bleaching along joints but shows little or no change ofstrength from fresh rock.

O:\Administration\Standard Forms and Documents\PMP26 Method of Rock-Rev2Galt Form PMP26

August 2017

BIOCLASTIC OOLITE SHELL CORAL ALGAL PISOLITESOrganic Inorganic Organic Organic Organic Inorganic

Particle size 0.002mm 0.06mm 2mm 50mm

CARBONATE MUD CARBONATE SILT CARBONATE SAND CARBONATE GRAVEL

Clayey CARBONATE MUD Siliceous CARBONATE SILT Siliceous CARBONATE SAND Mixed carbonate and 90

Calcareous CLAY Calcareous SILT Calcareous Silica SAND Non-carbonate GRAVEL 50

CLAY SILT Silica SAND GRAVEL 10

CALCILUTITE (Carbonate claystone) CALCISILTITE CALCARENITE CALCIRUDITE

Clayey CALCILUTITE Siliceous CALCISILTITE Siliceous CALCARENITE Conglomeratic CALCIRUDITE 90

Calcareous CALCILUTITE Calcareous CALCISILTITE Calcareous SANDSTONE Calcareous CONGLOMERATE 50

CLAYSTONE SILTSTONE SANDSTONE CONGLOMERATE OR BRECCIA 10

Detrital LIMESTONE CONGLOMERATE LIMESTONE

Argillaceous LIMESTONE Siliceous LIMESTONE Siliceous Detrital LIMESTONE Conglomeratic LIMESTONE 90

Calcareous LIMESTONE Calcareous LIMESTONE Calcareous SANDSTONE Calcareous CONGLOMERATE 50

CLAYSTONE SILTSTONE SANDSTONE CONGLOMERATE OR BRECCIA 10

Note: Strength categories not consistent with AS 1726-2017

CLARK AND WALKER CLASSIFICATION SYSTEM

Adapted from: Clark, A.R., & Walker, B.F. (1977) A proposed scheme for the classifiaction and nomenclature for use in the engineering descripion of MiddleEastern sedimentary rocks. Géotechnique 27 No. 1, 93-99.

TOTA

L CAR

BONA

TE C

ONTE

NT (%

)(c

onst

ituen

t par

ticle

s plu

s mat

rix)

Very

soft

to H

ard

(<36

-300

kPa

)

Hard

to M

oder

atel

yW

eak

(0.3

-12.

5 M

Pa)

Mod

erat

ely

Stro

ng to

Stro

ng(1

2.5-

100M

Pa)

Stro

ng to

Ext

rem

ely

Stro

ng(7

0->2

00M

Pa)

APPR

OXIM

ATE

UNCO

NFIN

EDCO

MPR

ESSI

VEST

RENG

TH

Descriptive Terms Based on Origin of Constituent ParticlesNot Discernible by Eye

Fine-grained LIMESTONE

CRYSTALLINE LIMESTONE OR MARBLE

(uniform grain size and loss of original texture)

Conventional metamorphic rock nomeclature applies

O:\Administration\Standard Forms and Documents\PMP20 Clark and Walker Classification Rev2Galt Form PMP20

August 2017

Clayey SAND: fine to coarse grained, grey-brown, withsome gravel, many shells, loose

With some calcarenite gravel

With some gravel, loose to medium dense

START CORING AT 0.00m

Hole terminated at 3.15 m

SC

TCR=%SCR=%RQD=%

1.75TCR=%SCR=%RQD=%

1.45 3.15m

1.00m

1.75m

Seabed sample taken

HQ

3

EL

VL

L M H VH

EH

ESTIMATED STRENGTHIs(50)

-0.0

3

-0.1

-0.3

-1 -3 -10

20 40 100

300

1000

VIS

UA

L (joints, partings, seams, zones, etc)

Description, orientation, infillingor coating, shape, roughness,

thickness, other

DESCRIPTIONROCK TYPE : Colour, Grain size, Structure

(texture, fabric, mineral composition, hardnessalteration, cementation, etc as applicable)

US

CS

SY

MB

OL

CO

RE

RU

N

DE

TA

ILS

- Axial - Diametral - Irregular

NATURALFRACTURE

(mm)

FRACTURESPROGRESS ADDITIONAL DATA

Wea

ther

ing

MATERIAL

GR

AP

HIC

LOG

DR

ILLI

NG

& C

AS

ING

DE

PT

H (

m)

DRILLING

SA

MP

LES

&F

IELD

TE

ST

S

WA

TE

RContractor: TAMS

Drill Rig: SubmersibleInclination: -90°

Job Number: J1701177

Client: Wallbridge Gilbert Aztec

Project: Beadon Creek Channel

Location: Onslow

Date: 12/08/2017

Logged: PZChecked Date: 24/08/2017

Checked By: RP

BOREHOLE: DL01

See Explanatory Notes and Method of Soil Description sheets fordetails of abbreviations and basis of descriptions

Sheet 1 OF 1

Comments:

Easting: 305928 m

Northing: 7608463 mDatum: MGA94 Zone 50

Surface RL: -5.4 m LAT

GA

LT L

IB 1

.01.

GLB

Log

GG

_CO

RE

D_B

OR

EH

OLE

J17

0117

7.G

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25/

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1 8

.30.

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, CP

T, P

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| Li

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1.0

1 20

13-0

2-21

Prj:

GA

LT 1

.01

2013

-02-

21

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

RickPiovesan

Typewritten text

SOIL PROFILE BASED ON VERY LIMITED SAMPLE RECOVERY

PointID : DL01 Depth Range: 0.30 - 1.70 m



A4FIGURE NoPROJECT No

SCALE

CHECKED DATE

DATEDRAWNTITLE

Not To Scale

25/08/2017

25/08/2017

J1701177 1/1

Wallbridge Gilbert AztecOnslow

Beadon Creek ChannelCore Photo - DL01

GA

LT L

IB 1

.01.

GLB

Grf

cTbl

DG

PH

OT

O C

OR

E P

HO

TO

4 P

ER

PA

GE

J17

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7.G

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<<

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25/

08/2

017

09:1

8 8

.30.

003

Dat

gel D

GD

, CP

T, P

hoto

, Mon

itorin

g T

ools

| Li

b: G

ALT

1.0

1 20

13-0

2-21

Prj:

GA

LT 1

.01

2013

-02-

21

Clayey SAND: brown-grey, loose

CALCARENITE: red-brown, fine to coarse grained, wellcemented in parts

Clayey SAND: fine to medium grained, brown-grey, withsome calcareous gravel and cobbles, loose to mediumdense



SC

SC

TCR=%SCR=%RQD=%

1.75

TCR=%SCR=%RQD=%

1.35

0.25m

0.75m

3.10m

HQ

3

EL

VL

L M H VH

EH


-0.0

3

-0.1

-0.3

-1 -3 -10

20 40 100

300

1000

VIS

UA



thickness, other



US

CS

SY

MB

OL

CO

RE

RU

N

DE

TA

ILS


NATURALFRACTURE

(mm)


Wea

ther

ing

MATERIAL

GR

AP

HIC

LOG

DR

ILLI

NG

& C

AS

ING

DE

PT

H (

m)

DRILLING

SA

MP

LES

&F

IELD

TE

ST

S

WA

TE

RContractor: TAMS





Location: Onslow

Date: 13/08/2017


Checked By: RP

BOREHOLE: DL02


Sheet 1 OF 1

Comments:

Easting: 306136 m



GA

LT L

IB 1

.01.

GLB

Log

GG

_CO

RE

D_B

OR

EH

OLE

J17

0117

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Dat

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, CP

T, P

hoto

, Mon

itorin

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ools

| Li

b: G

ALT

1.0

1 20

13-0

2-21

Prj:

GA

LT 1

.01

2013

-02-

21

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

RickPiovesan

Typewritten text




SCALE

CHECKED DATE

DATEDRAWNTITLE

Not To Scale

25/08/2017

25/08/2017

J1701177 1/1



GA

LT L

IB 1

.01.

GLB

Grf

cTbl

DG

PH

OT

O C

OR

E P

HO

TO

4 P

ER

PA

GE

J17

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Dat

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, CP

T, P

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ools

| Li

b: G

ALT

1.0

1 20

13-0

2-21

Prj:

GA

LT 1

.01

2013

-02-

21

Clayey SAND: fine to coarse grained, grey-brown, withsome shells, loose

CALCARENITE: well cemented, red-brown andyellow-white zone

Clayey SAND: red-brown and white-grey, with some fineto coarse grained calcareous gravel, loose to mediumdense

Some calcareous gravel and cobbles



SC

SC

TCR=%SCR=%RQD=%

1.75

TCR=%SCR=%RQD=%

1.40

TCR=%SCR=%RQD=%

1.40

0.15m

0.40m

4.55m

2.00m

HQ

3

EL

VL

L M H VH

EH


-0.0

3

-0.1

-0.3

-1 -3 -10

20 40 100

300

1000

VIS

UA



thickness, other



US

CS

SY

MB

OL

CO

RE

RU

N

DE

TA

ILS


NATURALFRACTURE

(mm)


Wea

ther

ing

MATERIAL

GR

AP

HIC

LOG

DR

ILLI

NG

& C

AS

ING

DE

PT

H (

m)

DRILLING

SA

MP

LES

&F

IELD

TE

ST

S

WA

TE

RContractor: TAMS





Location: Onslow

Date: 13/08/2017


Checked By: RP

BOREHOLE: DL03


Sheet 1 OF 1

Comments:

Easting: 306218 m



GA

LT L

IB 1

.01.

GLB

Log

GG

_CO

RE

D_B

OR

EH

OLE

J17

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13:4

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003

Dat

gel D

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, CP

T, P

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itorin

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ools

| Li

b: G

ALT

1.0

1 20

13-0

2-21

Prj:

GA

LT 1

.01

2013

-02-

21

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

RickPiovesan

Typewritten text





SCALE

CHECKED DATE

DATEDRAWNTITLE

Not To Scale

25/08/2017

25/08/2017

J1701177 1/1



GA

LT L

IB 1

.01.

GLB

Grf

cTbl

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win

gFile

>>

25/

08/2

017

09:1

8 8

.30.

003

Dat

gel D

GD

, CP

T, P

hoto

, Mon

itorin

g T

ools

| Li

b: G

ALT

1.0

1 20

13-0

2-21

Prj:

GA

LT 1

.01

2013

-02-

21

Clayey SAND:fine to coarse grained, red-brown, withsome fine to coarse grained gravel, with some shells,loose

Some thin calcareous zones, some gravel

Medium dense

Sandy CLAY: red-brown, fine to coarse grained sand,with some gravel, with some shells, very stiff to hard(possibly red bed material)



SC

CL

TCR=%SCR=%RQD=%

1.75

TCR=%SCR=%RQD=%

1.40

TCR=%SCR=%RQD=%

1.40

3.50m

4.55m

0.80m

2.00m

Seabed sample taken

HQ

3

EL

VL

L M H VH

EH


-0.0

3

-0.1

-0.3

-1 -3 -10

20 40 100

300

1000

VIS

UA



thickness, other



US

CS

SY

MB

OL

CO

RE

RU

N

DE

TA

ILS


NATURALFRACTURE

(mm)


Wea

ther

ing

MATERIAL

GR

AP

HIC

LOG

DR

ILLI

NG

& C

AS

ING

DE

PT

H (

m)

DRILLING

SA

MP

LES

&F

IELD

TE

ST

S

WA

TE

RContractor: TAMS





Location: Onslow

Date: 14/08/2017


Checked By: RP

BOREHOLE: DL04


Sheet 1 OF 1

Comments:

Easting: 306375 m



GA

LT L

IB 1

.01.

GLB

Log

GG

_CO

RE

D_B

OR

EH

OLE

J17

0117

7.G

PJ

<<

Dra

win

gFile

>>

25/

08/2

017

13:4

1 8

.30.

003

Dat

gel D

GD

, CP

T, P

hoto

, Mon

itorin

g T

ools

| Li

b: G

ALT

1.0

1 20

13-0

2-21

Prj:

GA

LT 1

.01

2013

-02-

21

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

RickPiovesan

Typewritten text







SCALE

CHECKED DATE

DATEDRAWNTITLE

Not To Scale

25/08/2017

25/08/2017

J1701177 1/2



GA

LT L

IB 1

.01.

GLB

Grf

cTbl

DG

PH

OT

O C

OR

E P

HO

TO

4 P

ER

PA

GE

J17

0117

7.G

PJ

<<

Dra

win

gFile

>>

25/

08/2

017

09:1

8 8

.30.

003

Dat

gel D

GD

, CP

T, P

hoto

, Mon

itorin

g T

ools

| Li

b: G

ALT

1.0

1 20

13-0

2-21

Prj:

GA

LT 1

.01

2013

-02-

21



SCALE

CHECKED DATE

DATEDRAWNTITLE

Not To Scale

25/08/2017

25/08/2017

J1701177 2/2



GA

LT L

IB 1

.01.

GLB

Grf

cTbl

DG

PH

OT

O C

OR

E P

HO

TO

4 P

ER

PA

GE

J17

0117

7.G

PJ

<<

Dra

win

gFile

>>

25/

08/2

017

09:1

8 8

.30.

003

Dat

gel D

GD

, CP

T, P

hoto

, Mon

itorin

g T

ools

| Li

b: G

ALT

1.0

1 20

13-0

2-21

Prj:

GA

LT 1

.01

2013

-02-

21

Clayey SAND:fine to coarse grained, grey-brown, withsome gravel, with some shells, loose

Some fine to coarse calcareous gravel

Minor bands of calcarenite

Loose to medium dense



SC

TCR=%SCR=%RQD=%

1.75

TCR=%SCR=%RQD=%

1.40

TCR=%SCR=%RQD=%

1.40 4.55m

1.75m

2.80m

3.15m

Seabed sample taken

HQ

3

B-01

EL

VL

L M H VH

EH


-0.0

3

-0.1

-0.3

-1 -3 -10

20 40 100

300

1000

VIS

UA



thickness, other



US

CS

SY

MB

OL

CO

RE

RU

N

DE

TA

ILS


NATURALFRACTURE

(mm)


Wea

ther

ing

MATERIAL

GR

AP

HIC

LOG

DR

ILLI

NG

& C

AS

ING

DE

PT

H (

m)

DRILLING

SA

MP

LES

&F

IELD

TE

ST

S

WA

TE

RContractor: TAMS





Location: Onslow

Date: 14/08/2017


Checked By: RP

BOREHOLE: DL05


Sheet 1 OF 1

Comments:

Easting: 306571 m



GA

LT L

IB 1

.01.

GLB

Log

GG

_CO

RE

D_B

OR

EH

OLE

J17

0117

7.G

PJ

<<

Dra

win

gFile

>>

25/

08/2

017

13:4

1 8

.30.

003

Dat

gel D

GD

, CP

T, P

hoto

, Mon

itorin

g T

ools

| Li

b: G

ALT

1.0

1 20

13-0

2-21

Prj:

GA

LT 1

.01

2013

-02-

21

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

RickPiovesan

Typewritten text







SCALE

CHECKED DATE

DATEDRAWNTITLE

Not To Scale

25/08/2017

25/08/2017

J1701177 1/1



GA

LT L

IB 1

.01.

GLB

Grf

cTbl

DG

PH

OT

O C

OR

E P

HO

TO

4 P

ER

PA

GE

J17

0117

7.G

PJ

<<

Dra

win

gFile

>>

25/

08/2

017

09:1

8 8

.30.

003

Dat

gel D

GD

, CP

T, P

hoto

, Mon

itorin

g T

ools

| Li

b: G

ALT

1.0

1 20

13-0

2-21

Prj:

GA

LT 1

.01

2013

-02-

21

Clayey SAND:fine to coarse grained, grey-brown, withsome gravel, with some shells, loose

With some zones of gravel

With some zones of broken calcarenite

Sandy CLAY: red-brown, high silt content, firm to stiff(possibly red bed material)



SC

CL

TCR=%SCR=%RQD=%

1.75

TCR=%SCR=%RQD=%

1.40

TCR=%SCR=%RQD=%

1.40

3.90m

4.55m

1.50m

3.40m

HQ

3

EL

VL

L M H VH

EH


-0.0

3

-0.1

-0.3

-1 -3 -10

20 40 100

300

1000

VIS

UA



thickness, other



US

CS

SY

MB

OL

CO

RE

RU

N

DE

TA

ILS


NATURALFRACTURE

(mm)


Wea

ther

ing

MATERIAL

GR

AP

HIC

LOG

DR

ILLI

NG

& C

AS

ING

DE

PT

H (

m)

DRILLING

SA

MP

LES

&F

IELD

TE

ST

S

WA

TE

RContractor: TAMS





Location: Onslow

Date: 15/08/2017


Checked By: RP

BOREHOLE: DL06


Sheet 1 OF 1

Comments:

Easting: 306707 m



GA

LT L

IB 1

.01.

GLB

Log

GG

_CO

RE

D_B

OR

EH

OLE

J17

0117

7.G

PJ

<<

Dra

win

gFile

>>

25/

08/2

017

13:4

1 8

.30.

003

Dat

gel D

GD

, CP

T, P

hoto

, Mon

itorin

g T

ools

| Li

b: G

ALT

1.0

1 20

13-0

2-21

Prj:

GA

LT 1

.01

2013

-02-

21

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

RickPiovesan

Typewritten text






SCALE

CHECKED DATE

DATEDRAWNTITLE

Not To Scale

25/08/2017

25/08/2017

J1701177 1/1



GA

LT L

IB 1

.01.

GLB

Grf

cTbl

DG

PH

OT

O C

OR

E P

HO

TO

4 P

ER

PA

GE

J17

0117

7.G

PJ

<<

Dra

win

gFile

>>

25/

08/2

017

09:1

8 8

.30.

003

Dat

gel D

GD

, CP

T, P

hoto

, Mon

itorin

g T

ools

| Li

b: G

ALT

1.0

1 20

13-0

2-21

Prj:

GA

LT 1

.01

2013

-02-

21

Silty SAND: fine to medium grained, grey-brown, someshells, some calcarenite gravel, some clay, loose

Zones of calcarenite gravel, fine to coarse gravel


SM

TCR=%SCR=%RQD=%

1.80

TCR=%SCR=%RQD=%

1.40

TCR=%SCR=%RQD=%

1.40

TCR=%SCR=%RQD=%

3.00m

Push tube sample taken PVC75 mm (0-0.5 m depth)

HQ

3

EL

VL

L M H VH

EH


-0.0

3

-0.1

-0.3

-1 -3 -10

20 40 100

300

1000

VIS

UA



thickness, other



US

CS

SY

MB

OL

CO

RE

RU

N

DE

TA

ILS


NATURALFRACTURE

(mm)


Wea

ther

ing

MATERIAL

GR

AP

HIC

LOG

DR

ILLI

NG

& C

AS

ING

DE

PT

H (

m)

DRILLING

SA

MP

LES

&F

IELD

TE

ST

S

WA

TE

RContractor: TAMS





Location: Onslow

Date: 18/08/2017


Checked By: RP

BOREHOLE: DL07


Sheet 1 OF 2

Comments:

Easting: 306824 m



GA

LT L

IB 1

.01.

GLB

Log

GG

_CO

RE

D_B

OR

EH

OLE

J17

0117

7.G

PJ

<<

Dra

win

gFile

>>

25/

08/2

017

13:4

1 8

.30.

003

Dat

gel D

GD

, CP

T, P

hoto

, Mon

itorin

g T

ools

| Li

b: G

ALT

1.0

1 20

13-0

2-21

Prj:

GA

LT 1

.01

2013

-02-

21

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

RickPiovesan

Typewritten text


Silty SAND: fine to medium grained, grey-brown, someshells, some calcarenite gravel, some clay, loose(continued)


SM

TCR=%SCR=%RQD=%

1.35 5.95m

HQ

3

EL

VL

L M H VH

EH


-0.0

3

-0.1

-0.3

-1 -3 -10

20 40 100

300

1000

VIS

UA



thickness, other



US

CS

SY

MB

OL

CO

RE

RU

N

DE

TA

ILS


NATURALFRACTURE

(mm)


Wea

ther

ing

MATERIAL

GR

AP

HIC

LOG

DR

ILLI

NG

& C

AS

ING

DE

PT

H (

m)

DRILLING

SA

MP

LES

&F

IELD

TE

ST

S

WA

TE

RContractor: TAMS





Location: Onslow

Date: 18/08/2017


Checked By: RP

BOREHOLE: DL07


Sheet 2 OF 2

Comments:

Easting: 306824 m



GA

LT L

IB 1

.01.

GLB

Log

GG

_CO

RE

D_B

OR

EH

OLE

J17

0117

7.G

PJ

<<

Dra

win

gFile

>>

25/

08/2

017

13:4

1 8

.30.

003

Dat

gel D

GD

, CP

T, P

hoto

, Mon

itorin

g T

ools

| Li

b: G

ALT

1.0

1 20

13-0

2-21

Prj:

GA

LT 1

.01

2013

-02-

21

5.0

5.5

6.0

6.5

7.0

7.5

8.0

8.5

9.0

9.5

RickPiovesan

Typewritten text







SCALE

CHECKED DATE

DATEDRAWNTITLE

Not To Scale

25/08/2017

25/08/2017

J1701177 1/1



GA

LT L

IB 1

.01.

GLB

Grf

cTbl

DG

PH

OT

O C

OR

E P

HO

TO

4 P

ER

PA

GE

J17

0117

7.G

PJ

<<

Dra

win

gFile

>>

25/

08/2

017

09:1

8 8

.30.

003

Dat

gel D

GD

, CP

T, P

hoto

, Mon

itorin

g T

ools

| Li

b: G

ALT

1.0

1 20

13-0

2-21

Prj:

GA

LT 1

.01

2013

-02-

21

Silty SAND: fine to medium grained, grey-brown, someshells, some gravel, loose


SM

Push tube sample taken PVC75 mm (0-0.5 m depth)

HQ

3

EL

VL

L M H VH

EH


-0.0

3

-0.1

-0.3

-1 -3 -10

20 40 100

300

1000

VIS

UA



thickness, other



US

CS

SY

MB

OL

CO

RE

RU

N

DE

TA

ILS


NATURALFRACTURE

(mm)


Wea

ther

ing

MATERIAL

GR

AP

HIC

LOG

DR

ILLI

NG

& C

AS

ING

DE

PT

H (

m)

DRILLING

SA

MP

LES

&F

IELD

TE

ST

S

WA

TE

RContractor: TAMS





Location: Onslow

Date: 18/08/2017


Checked By: RP

BOREHOLE: DL08


Sheet 1 OF 2

Comments:

Easting: 306769 m



GA

LT L

IB 1

.01.

GLB

Log

GG

_CO

RE

D_B

OR

EH

OLE

J17

0117

7.G

PJ

<<

Dra

win

gFile

>>

25/

08/2

017

13:4

1 8

.30.

003

Dat

gel D

GD

, CP

T, P

hoto

, Mon

itorin

g T

ools

| Li

b: G

ALT

1.0

1 20

13-0

2-21

Prj:

GA

LT 1

.01

2013

-02-

21

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

RickPiovesan

Typewritten text


Silty SAND: fine to medium grained, grey-brown, someshells, some gravel, loose (continued)Some zones of fine to coarse calcareous gravel


SM

7.35m

5.00m

HQ

3

EL

VL

L M H VH

EH


-0.0

3

-0.1

-0.3

-1 -3 -10

20 40 100

300

1000

VIS

UA



thickness, other



US

CS

SY

MB

OL

CO

RE

RU

N

DE

TA

ILS


NATURALFRACTURE

(mm)


Wea

ther

ing

MATERIAL

GR

AP

HIC

LOG

DR

ILLI

NG

& C

AS

ING

DE

PT

H (

m)

DRILLING

SA

MP

LES

&F

IELD

TE

ST

S

WA

TE

RContractor: TAMS





Location: Onslow

Date: 18/08/2017


Checked By: RP

BOREHOLE: DL08


Sheet 2 OF 2

Comments:

Easting: 306769 m



GA

LT L

IB 1

.01.

GLB

Log

GG

_CO

RE

D_B

OR

EH

OLE

J17

0117

7.G

PJ

<<

Dra

win

gFile

>>

25/

08/2

017

13:4

1 8

.30.

003

Dat

gel D

GD

, CP

T, P

hoto

, Mon

itorin

g T

ools

| Li

b: G

ALT

1.0

1 20

13-0

2-21

Prj:

GA

LT 1

.01

2013

-02-

21

5.0

5.5

6.0

6.5

7.0

7.5

8.0

8.5

9.0

9.5

RickPiovesan

Typewritten text






SCALE

CHECKED DATE

DATEDRAWNTITLE

Not To Scale

25/08/2017

25/08/2017

J1701177 1/1



GA

LT L

IB 1

.01.

GLB

Grf

cTbl

DG

PH

OT

O C

OR

E P

HO

TO

4 P

ER

PA

GE

J17

0117

7.G

PJ

<<

Dra

win

gFile

>>

25/

08/2

017

09:1

8 8

.30.

003

Dat

gel D

GD

, CP

T, P

hoto

, Mon

itorin

g T

ools

| Li

b: G

ALT

1.0

1 20

13-0

2-21

Prj:

GA

LT 1

.01

2013

-02-

21

Silty SAND: fine to medium grained, grey-brown, someshells, some clay, zones of calcareous gravel, loose tomedium dense

Loose to medium, dense, zone of fine to coarsecalcareous gravel


SM

TCR=%SCR=%RQD=%

1.80

TCR=%SCR=%RQD=%

1.40

TCR=%SCR=%RQD=%

1.40

TCR=%SCR=%RQD=%

1.80m

HQ

3

EL

VL

L M H VH

EH


-0.0

3

-0.1

-0.3

-1 -3 -10

20 40 100

300

1000

VIS

UA



thickness, other



US

CS

SY

MB

OL

CO

RE

RU

N

DE

TA

ILS


NATURALFRACTURE

(mm)


Wea

ther

ing

MATERIAL

GR

AP

HIC

LOG

DR

ILLI

NG

& C

AS

ING

DE

PT

H (

m)

DRILLING

SA

MP

LES

&F

IELD

TE

ST

S

WA

TE

RContractor: TAMS





Location: Onslow

Date: 17/08/2017


Checked By: RP

BOREHOLE: DL09


Sheet 1 OF 2

Comments:

Easting: 306630 m



GA

LT L

IB 1

.01.

GLB

Log

GG

_CO

RE

D_B

OR

EH

OLE

J17

0117

7.G

PJ

<<

Dra

win

gFile

>>

25/

08/2

017

13:4

1 8

.30.

003

Dat

gel D

GD

, CP

T, P

hoto

, Mon

itorin

g T

ools

| Li

b: G

ALT

1.0

1 20

13-0

2-21

Prj:

GA

LT 1

.01

2013

-02-

21

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

RickPiovesan

Typewritten text


Silty SAND: fine to medium grained, grey-brown, someshells, some clay, zones of calcareous gravel, loose tomedium dense (continued)


SM

TCR=%SCR=%RQD=%

1.35 5.95m

HQ

3

EL

VL

L M H VH

EH


-0.0

3

-0.1

-0.3

-1 -3 -10

20 40 100

300

1000

VIS

UA



thickness, other



US

CS

SY

MB

OL

CO

RE

RU

N

DE

TA

ILS


NATURALFRACTURE

(mm)


Wea

ther

ing

MATERIAL

GR

AP

HIC

LOG

DR

ILLI

NG

& C

AS

ING

DE

PT

H (

m)

DRILLING

SA

MP

LES

&F

IELD

TE

ST

S

WA

TE

RContractor: TAMS





Location: Onslow

Date: 17/08/2017


Checked By: RP

BOREHOLE: DL09


Sheet 2 OF 2

Comments:

Easting: 306630 m



GA

LT L

IB 1

.01.

GLB

Log

GG

_CO

RE

D_B

OR

EH

OLE

J17

0117

7.G

PJ

<<

Dra

win

gFile

>>

25/

08/2

017

13:4

1 8

.30.

003

Dat

gel D

GD

, CP

T, P

hoto

, Mon

itorin

g T

ools

| Li

b: G

ALT

1.0

1 20

13-0

2-21

Prj:

GA

LT 1

.01

2013

-02-

21

5.0

5.5

6.0

6.5

7.0

7.5

8.0

8.5

9.0

9.5

RickPiovesan

Typewritten text





SCALE

CHECKED DATE

DATEDRAWNTITLE

Not To Scale

25/08/2017

25/08/2017

J1701177 1/1



GA

LT L

IB 1

.01.

GLB

Grf

cTbl

DG

PH

OT

O C

OR

E P

HO

TO

4 P

ER

PA

GE

J17

0117

7.G

PJ

<<

Dra

win

gFile

>>

25/

08/2

017

09:1

8 8

.30.

003

Dat

gel D

GD

, CP

T, P

hoto

, Mon

itorin

g T

ools

| Li

b: G

ALT

1.0

1 20

13-0

2-21

Prj:

GA

LT 1

.01

2013

-02-

21

Silty SAND: fine to coarse grained, pale brown, withsome shells, with some calcareous gravel

SAND: fine grained with some medium to coarsegrained, pale brown, some shells, some calcareousgravel, some silt, loose to medium dense



SM

SP

TCR=%SCR=%RQD=%

1.75

TCR=%SCR=%RQD=%

1.40

TCR=%SCR=%RQD=%

1.40

2.40m

4.55m

4.00: Borehole sidescollapsing. Drillingdiscontinued. Note: secondborehole DL10A discontinuedat 2.5 m

HQ

3

EL

VL

L M H VH

EH


-0.0

3

-0.1

-0.3

-1 -3 -10

20 40 100

300

1000

VIS

UA



thickness, other



US

CS

SY

MB

OL

CO

RE

RU

N

DE

TA

ILS


NATURALFRACTURE

(mm)


Wea

ther

ing

MATERIAL

GR

AP

HIC

LOG

DR

ILLI

NG

& C

AS

ING

DE

PT

H (

m)

DRILLING

SA

MP

LES

&F

IELD

TE

ST

S

WA

TE

RContractor: TAMS





Location: Onslow

Date: 15/08/2017


Checked By: RP

BOREHOLE: DL10


Sheet 1 OF 1

Comments:

Easting: 306705 m



GA

LT L

IB 1

.01.

GLB

Log

GG

_CO

RE

D_B

OR

EH

OLE

J17

0117

7.G

PJ

<<

Dra

win

gFile

>>

25/

08/2

017

13:4

1 8

.30.

003

Dat

gel D

GD

, CP

T, P

hoto

, Mon

itorin

g T

ools

| Li

b: G

ALT

1.0

1 20

13-0

2-21

Prj:

GA

LT 1

.01

2013

-02-

21

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

RickPiovesan

Typewritten text






SCALE

CHECKED DATE

DATEDRAWNTITLE

Not To Scale

25/08/2017

25/08/2017

J1701177 1/1



GA

LT L

IB 1

.01.

GLB

Grf

cTbl

DG

PH

OT

O C

OR

E P

HO

TO

4 P

ER

PA

GE

J17

0117

7.G

PJ

<<

Dra

win

gFile

>>

25/

08/2

017

09:1

9 8

.30.

003

Dat

gel D

GD

, CP

T, P

hoto

, Mon

itorin

g T

ools

| Li

b: G

ALT

1.0

1 20

13-0

2-21

Prj:

GA

LT 1

.01

2013

-02-

21

Silty SAND: fine to coarse grained, grey-brown, someclay, some shells, loose

Loose to medium dense, some calcareous gravel


SM

TCR=%SCR=%RQD=%

1.80

TCR=%SCR=%RQD=%

1.40

TCR=%SCR=%RQD=%

1.40

TCR=%SCR=%RQD=%

1.80m

HQ

3

EL

VL

L M H VH

EH


-0.0

3

-0.1

-0.3

-1 -3 -10

20 40 100

300

1000

VIS

UA



thickness, other



US

CS

SY

MB

OL

CO

RE

RU

N

DE

TA

ILS


NATURALFRACTURE

(mm)


Wea

ther

ing

MATERIAL

GR

AP

HIC

LOG

DR

ILLI

NG

& C

AS

ING

DE

PT

H (

m)

DRILLING

SA

MP

LES

&F

IELD

TE

ST

S

WA

TE

RContractor: TAMS





Location: Onslow

Date: 16/08/2017


Checked By: RP

BOREHOLE: DL11


Sheet 1 OF 2

Comments:

Easting: 306558 m



GA

LT L

IB 1

.01.

GLB

Log

GG

_CO

RE

D_B

OR

EH

OLE

J17

0117

7.G

PJ

<<

Dra

win

gFile

>>

25/

08/2

017

13:4

1 8

.30.

003

Dat

gel D

GD

, CP

T, P

hoto

, Mon

itorin

g T

ools

| Li

b: G

ALT

1.0

1 20

13-0

2-21

Prj:

GA

LT 1

.01

2013

-02-

21

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

RickPiovesan

Typewritten text


Silty SAND: fine to coarse grained, grey-brown, someclay, some shells, loose (continued)


SM

TCR=%SCR=%RQD=%

1.40

TCR=%SCR=%RQD=%

1.40

TCR=%SCR=%RQD=%

1.35 8.75m

HQ

3

EL

VL

L M H VH

EH


-0.0

3

-0.1

-0.3

-1 -3 -10

20 40 100

300

1000

VIS

UA



thickness, other



US

CS

SY

MB

OL

CO

RE

RU

N

DE

TA

ILS


NATURALFRACTURE

(mm)


Wea

ther

ing

MATERIAL

GR

AP

HIC

LOG

DR

ILLI

NG

& C

AS

ING

DE

PT

H (

m)

DRILLING

SA

MP

LES

&F

IELD

TE

ST

S

WA

TE

RContractor: TAMS





Location: Onslow

Date: 16/08/2017


Checked By: RP

BOREHOLE: DL11


Sheet 2 OF 2

Comments:

Easting: 306558 m



GA

LT L

IB 1

.01.

GLB

Log

GG

_CO

RE

D_B

OR

EH

OLE

J17

0117

7.G

PJ

<<

Dra

win

gFile

>>

25/

08/2

017

13:4

1 8

.30.

003

Dat

gel D

GD

, CP

T, P

hoto

, Mon

itorin

g T

ools

| Li

b: G

ALT

1.0

1 20

13-0

2-21

Prj:

GA

LT 1

.01

2013

-02-

21

5.0

5.5

6.0

6.5

7.0

7.5

8.0

8.5

9.0

9.5

RickPiovesan

Typewritten text






SCALE

CHECKED DATE

DATEDRAWNTITLE

Not To Scale

25/08/2017

25/08/2017

J1701177 1/1



GA

LT L

IB 1

.01.

GLB

Grf

cTbl

DG

PH

OT

O C

OR

E P

HO

TO

4 P

ER

PA

GE

J17

0117

7.G

PJ

<<

Dra

win

gFile

>>

25/

08/2

017

09:1

9 8

.30.

003

Dat

gel D

GD

, CP

T, P

hoto

, Mon

itorin

g T

ools

| Li

b: G

ALT

1.0

1 20

13-0

2-21

Prj:

GA

LT 1

.01

2013

-02-

21

Silty SAND: fine to medium grained, grey-brown, someshells, some clay, some gravel, loose


Hole terminated at 1.75 mDifficulty drilling, relocate to DL12A

SM

1.75m

HQ

3

EL

VL

L M H VH

EH


-0.0

3

-0.1

-0.3

-1 -3 -10

20 40 100

300

1000

VIS

UA



thickness, other



US

CS

SY

MB

OL

CO

RE

RU

N

DE

TA

ILS


NATURALFRACTURE

(mm)


Wea

ther

ing

MATERIAL

GR

AP

HIC

LOG

DR

ILLI

NG

& C

AS

ING

DE

PT

H (

m)

DRILLING

SA

MP

LES

&F

IELD

TE

ST

S

WA

TE

RContractor: TAMS





Location: Onslow

Date: 17/08/2017


Checked By: RP

BOREHOLE: DL12


Sheet 1 OF 1

Comments:

GA

LT L

IB 1

.01.

GLB

Log

GG

_CO

RE

D_B

OR

EH

OLE

J17

0117

7.G

PJ

<<

Dra

win

gFile

>>

25/

08/2

017

13:4

1 8

.30.

003

Dat

gel D

GD

, CP

T, P

hoto

, Mon

itorin

g T

ools

| Li

b: G

ALT

1.0

1 20

13-0

2-21

Prj:

GA

LT 1

.01

2013

-02-

21

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

Easting: 306572 m

Northing: 7605315 m

Datum: MGA94 Zone 50


RickPiovesan

Typewritten text


Silty SAND: fine to medium grained, grey-brown, somegravel and cobble size pieces, some shells, loose

Full core recoveryCALCARENITE GravelCALCARENITE: fine to coarse grained, well cemented

Calcareous SANDSTONE: fine to coarse grained,red-brown, weakly cemented


SM

TCR=%SCR=%RQD=%

1.80

TCR=%SCR=%RQD=%

1.40

TCR=%SCR=%RQD=%

1.40

TCR=%SCR=%RQD=%

4.55m

2.00m

4.60m4.65m

4.75m

4.90m

HQ

3

EL

VL

L M H VH

EH


-0.0

3

-0.1

-0.3

-1 -3 -10

20 40 100

300

1000

VIS

UA



thickness, other



US

CS

SY

MB

OL

CO

RE

RU

N

DE

TA

ILS


NATURALFRACTURE

(mm)


Wea

ther

ing

MATERIAL

GR

AP

HIC

LOG

DR

ILLI

NG

& C

AS

ING

DE

PT

H (

m)

DRILLING

SA

MP

LES

&F

IELD

TE

ST

S

WA

TE

RContractor: TAMS





Location: Onslow

Date: 17/08/2017


Checked By: RP

BOREHOLE: DL12A


Sheet 1 OF 2

Comments:

Easting: 306581 m



GA

LT L

IB 1

.01.

GLB

Log

GG

_CO

RE

D_B

OR

EH

OLE

J17

0117

7.G

PJ

<<

Dra

win

gFile

>>

25/

08/2

017

13:4

2 8

.30.

003

Dat

gel D

GD

, CP

T, P

hoto

, Mon

itorin

g T

ools

| Li

b: G

ALT

1.0

1 20

13-0

2-21

Prj:

GA

LT 1

.01

2013

-02-

21

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

Loose to medium dense, some fine to coarsecalcareous gravel

RickPiovesan

Typewritten text

SOIL PROFILE BASED ON VERY LIMITED SAMPLE RECOVERY TO 4.5 m

Full core recovery (continued)Calcareous SANDSTONE and CalcareousCLAYSTONE: red-brown, weakly cemented


TCR=%SCR=%RQD=%

1.50

HQ

3

EL

VL

L M H VH

EH


-0.0

3

-0.1

-0.3

-1 -3 -10

20 40 100

300

1000

VIS

UA



thickness, other



US

CS

SY

MB

OL

CO

RE

RU

N

DE

TA

ILS


NATURALFRACTURE

(mm)


Wea

ther

ing

MATERIAL

GR

AP

HIC

LOG

DR

ILLI

NG

& C

AS

ING

DE

PT

H (

m)

DRILLING

SA

MP

LES

&F

IELD

TE

ST

S

WA

TE

RContractor: TAMS





Location: Onslow

Date: 17/08/2017


Checked By: RP

BOREHOLE: DL12A


Sheet 2 OF 2

Comments:

Easting: 306581 m



GA

LT L

IB 1

.01.

GLB

Log

GG

_CO

RE

D_B

OR

EH

OLE

J17

0117

7.G

PJ

<<

Dra

win

gFile

>>

25/

08/2

017

13:4

2 8

.30.

003

Dat

gel D

GD

, CP

T, P

hoto

, Mon

itorin

g T

ools

| Li

b: G

ALT

1.0

1 20

13-0

2-21

Prj:

GA

LT 1

.01

2013

-02-

21

5.0

5.5

6.0

6.5

7.0

7.5

8.0

8.5

9.0

9.5

PointID : DL12A Depth Range: 6.00 - 6.10 m




SCALE

CHECKED DATE

DATEDRAWNTITLE

Not To Scale

25/08/2017

25/08/2017

J1701177 1/1


Beadon Creek ChannelCore Photo - DL12A

GA

LT L

IB 1

.01.

GLB

Grf

cTbl

DG

PH

OT

O C

OR

E P

HO

TO

4 P

ER

PA

GE

J17

0117

7.G

PJ

<<

Dra

win

gFile

>>

25/

08/2

017

09:1

9 8

.30.

003

Dat

gel D

GD

, CP

T, P

hoto

, Mon

itorin

g T

ools

| Li

b: G

ALT

1.0

1 20

13-0

2-21

Prj:

GA

LT 1

.01

2013

-02-

21




SCALE

CHECKED DATE

DATEDRAWNTITLE

Not To Scale

25/08/2017

25/08/2017

J1701177 1/1


Beadon Creek ChannelCore Photo - DL12A

GA

LT L

IB 1

.01.

GLB

Grf

cTbl

DG

PH

OT

O C

OR

E P

HO

TO

4 P

ER

PA

GE

J17

0117

7.G

PJ

<<

Dra

win

gFile

>>

25/

08/2

017

09:1

9 8

.30.

003

Dat

gel D

GD

, CP

T, P

hoto

, Mon

itorin

g T

ools

| Li

b: G

ALT

1.0

1 20

13-0

2-21

Prj:

GA

LT 1

.01

2013

-02-

21



ABN: 64 625 054 729

Appendix B: Drilling Records

C. Rutter

‐5.4

‐7.0 1.6 3.1FINAL

LAT‐8.5

CountMast

Marker

Rod

LengthDepth LAT RUN TIME

1B 2.4 0 0.0 ‐5.4 13:40

1B 2.2 0 0.2 ‐5.6

1B 2.0 0 0.4 ‐5.8

1B 1.8 0 0.6 ‐6.0

1B 1.6 0 0.8 ‐6.2

1B 1.4 0 1.0 ‐6.4

1B 1.2 0 1.2 ‐6.6

1B 1.0 0 1.4 ‐6.8

1B 0.8 0 1.6 ‐7.0

1B 0.7 0 1.7 ‐7.1

1B 1R 2.1 1.4 1.7 ‐7.1

1B 1R 1.9 1.4 1.9 ‐7.3

1B 1R 1.7 1.4 2.1 ‐7.5

1B 1R 1.5 1.4 2.3 ‐7.7

1B 1R 1.3 1.4 2.5 ‐7.9

1B 1R 1.1 1.4 2.7 ‐8.1

1B 1R 0.9 1.4 2.9 ‐8.3

1B 1R 0.7 1.4 3.1 ‐8.5 14:25

DATE DIVER DEPTH 7.8LAT

TIME START TIDE 2.4

REQUESTED LAT

DEPTH

SUBSEA COMMENTS TOPSIDE COMMENTS

FINAL DRILL DEPTH

BELOW SEABEDDRILL DEPTH REQUIRED BSB

CLIENT / PROJECT OMSB / MARITIME CONSTRUCTION DRILL SITE No. DL01 DIVER

12‐Aug‐17

13:40

COORDINATES21° 36.983

Tide Ref ‐ Austides 2017 ‐ Onslow115° 07.505

T. Whitham

‐4.4

‐7.0 2.6 3.3FINAL

LAT‐7.7

CountMast

Marker

Rod


1B 2.4 0 0.0 ‐4.4 10:00

1B 2.2 0 0.2 ‐4.6

1B 2.0 0 0.4 ‐4.8

1B 1.8 0 0.6 ‐5.0

1B 1.6 0 0.8 ‐5.2

1B 1.4 0 1.0 ‐5.4

1B 1.2 0 1.2 ‐5.6

1B 1.0 0 1.4 ‐5.8

1B 0.8 0 1.6 ‐6.0

1B 0.7 0 1.7 ‐6.1 10:15

1B 1R 2.1 1.4 1.7 ‐6.1 11:44

1B 1R 1.9 1.4 1.9 ‐6.3

1B 1R 1.7 1.4 2.1 ‐6.5

1B 1R 1.5 1.4 2.3 ‐6.7

1B 1R 1.3 1.4 2.5 ‐6.9

1B 1R 1.1 1.4 2.7 ‐7.1

1B 1R 0.9 1.4 2.9 ‐7.3

1B 1R 0.7 1.4 3.1 ‐7.5 12:05

1B 1R 0.7 1.4 3.3 ‐7.7 12:14

Slow Drilling 1.75m to 2.0m

DATE 13‐Aug‐17 DIVER DEPTH 5.5LAT

TIME START 10:00 TIDE 1.1

REQUESTED LAT

DEPTHREQUIRED DRILL DEPTH BSB

FINAL DRILL DEPTH

BELOW SEABED





S. Franko

‐3.9

‐7.0 3.1 4.5FINAL

LAT‐8.4

CountMast

Marker

Rod


1B 2.4 0 0.0 ‐3.9 15:40

1B 2.2 0 0.2 ‐4.1

1B 2.0 0 0.4 ‐4.3

1B 1.8 0 0.6 ‐4.5

1B 1.6 0 0.8 ‐4.7 15:47

1B 1.4 0 1.0 ‐4.9

1B 1.2 0 1.2 ‐5.1

1B 1.0 0 1.4 ‐5.3

1B 0.8 0 1.6 ‐5.5

1B 0.7 0 1.7 ‐5.6 15:48

1B 1R 2.1 1.4 1.7 ‐5.6 16:10

1B 1R 1.9 1.4 1.9 ‐5.8

1B 1R 1.7 1.4 2.1 ‐6.0 16:15

1B 1R 1.5 1.4 2.3 ‐6.2

1B 1R 1.3 1.4 2.5 ‐6.4

1B 1R 1.1 1.4 2.7 ‐6.6

1B 1R 0.9 1.4 2.9 ‐6.8

1B 1R 0.7 1.4 3.1 ‐7.0 16:32

1B 2R 2.1 2.8 3.1 ‐7.0 16:50

1B 2R 1.9 2.8 3.3 ‐7.2

1B 2R 1.7 2.8 3.5 ‐7.4

1B 2R 1.5 2.8 3.7 ‐7.6

1B 2R 1.3 2.8 3.9 ‐7.8

1B 2R 1.1 2.8 4.1 ‐8.0

1B 2R 0.9 2.8 4.3 ‐8.2

1B 2R 0.7 2.8 4.5 ‐8.4 16:57




DATE 13‐Aug‐17 DIVER DEPTH 6LAT


REQUESTED LAT

DEPTHDRILL DEPTH REQUIRED BSB

FINAL DRILL DEPTH

BELOW SEABED


easy drilling

Low visability

D. Mellett

‐3.9

‐7.0 3.1 4.5FINAL

LAT‐8.4

CountMast

Marker

Rod


1B 2.4 0 0.0 ‐3.9 08:40

1B 2.2 0 0.2 ‐4.1

1B 2.0 0 0.4 ‐4.3

1B 1.8 0 0.6 ‐4.5

1B 1.6 0 0.8 ‐4.7

1B 1.4 0 1.0 ‐4.9

1B 1.2 0 1.2 ‐5.1

1B 1.0 0 1.4 ‐5.3

1B 0.8 0 1.6 ‐5.5

1B 0.7 0 1.7 ‐5.6 09:35

1B 1R 2.1 1.4 1.7 ‐5.6 09:40

1B 1R 1.9 1.4 1.9 ‐5.8

1B 1R 1.7 1.4 2.1 ‐6.0

1B 1R 1.5 1.4 2.3 ‐6.2 09:50

1B 1R 1.3 1.4 2.5 ‐6.4

1B 1R 1.1 1.4 2.7 ‐6.6

1B 1R 0.9 1.4 2.9 ‐6.8 09:55

1B 1R 0.7 1.4 3.1 ‐7.0 10:00

1B 2R 2.1 2.8 3.1 ‐7.0 10:15

1B 2R 1.9 2.8 3.3 ‐7.2

1B 2R 1.7 2.8 3.5 ‐7.4

1B 2R 1.5 2.8 3.7 ‐7.6

1B 2R 1.3 2.8 3.9 ‐7.8

1B 2R 1.1 2.8 4.1 ‐8.0

1B 2R 0.9 2.8 4.3 ‐8.2

1B 2R 0.7 2.8 4.5 ‐8.4 10:50

No core recovered to surface in this

section

DRILL DEPTH REQUIRED

Final drill depth


section

COMMENTS

Easy no resistence


section

TOPSIDE COMMENTS

REQUESTED LAT

DEPTH

FINAL DRILL DEPTH

BELOW SEABED


115° 07.757


TIME START TIDE 0.9

Tide Ref ‐ Austides 2017 ‐ Onslow

14‐Aug‐17

08:40


J. Hayes

‐3.2

‐7.0 3.8 4.5FINAL

LAT‐7.7

CountMast

Marker

Rod


1B 2.4 0 0.0 ‐3.2 13:25

1B 2.2 0 0.2 ‐3.4

1B 2.0 0 0.4 ‐3.6

1B 1.8 0 0.6 ‐3.8

1B 1.6 0 0.8 ‐4.0

1B 1.4 0 1.0 ‐4.2

1B 1.2 0 1.2 ‐4.4

1B 1.0 0 1.4 ‐4.6

1B 0.8 0 1.6 ‐4.8

1B 0.7 0 1.7 ‐4.9 13:28

1B 1R 2.1 1.4 1.7 ‐4.9 13:44

1B 1R 1.9 1.4 1.9 ‐5.1

1B 1R 1.7 1.4 2.1 ‐5.3

1B 1R 1.5 1.4 2.3 ‐5.5

1B 1R 1.3 1.4 2.5 ‐5.7

1B 1R 1.1 1.4 2.7 ‐5.9

1B 1R 0.9 1.4 2.9 ‐6.1

1B 1R 0.7 1.4 3.1 ‐6.3 13:45

1B 2R 2.1 2.8 3.1 ‐6.3 14:05

1B 2R 1.9 2.8 3.3 ‐6.5

1B 2R 1.7 2.8 3.5 ‐6.7

1B 2R 1.5 2.8 3.7 ‐6.9

1B 2R 1.3 2.8 3.9 ‐7.1

1B 2R 1.1 2.8 4.1 ‐7.3

1B 2R 0.9 2.8 4.3 ‐7.5

1B 2R 0.7 2.8 4.5 ‐7.7 14:08

1B 3R 2.1 4.2 4.5 ‐7.7

1B 3R 1.9 4.2 4.7 ‐7.9

1B 3R 1.7 4.2 4.9 ‐8.1

1B 3R 1.5 4.2 5.1 ‐8.3

1B 3R 1.3 4.2 5.3 ‐8.5

1B 3R 1.1 4.2 5.5 ‐8.7

1B 3R 0.9 4.2 5.7 ‐8.9

1B 3R 0.7 4.2 5.9 ‐9.1

DIVER


115° 07.867

FINAL DRILL DEPTH

BELOW SEABED


14‐Aug‐17

13:25

DRILL DEPTH REQUIRED BSB


TIME START TIDE 2.0

REQUESTED LAT

DEPTH

SUBSEA COMMENTS

CLIENT / PROJECT OMSB / MARITIME CONSTRUCTION DRILL SITE No. DL05

TOPSIDE COMMENTS

1m visability, hard bottom

very easy travel

very easy travel

very easy travel

very easy travel

C. Rutter

‐2.8

‐7.0 4.2 4.5FINAL

LAT‐7.3

CountMast

Marker

Rod


1B 2.4 0 0.0 ‐2.8 07:55

1B 2.2 0 0.2 ‐3.0

1B 2.0 0 0.4 ‐3.2

1B 1.8 0 0.6 ‐3.4

1B 1.6 0 0.8 ‐3.6

1B 1.4 0 1.0 ‐3.8

1B 1.2 0 1.2 ‐4.0

1B 1.0 0 1.4 ‐4.2

1B 0.8 0 1.6 ‐4.4

1B 0.7 0 1.7 ‐4.5 07:55

1B 1R 2.1 1.4 1.7 ‐4.5 08:07

1B 1R 1.9 1.4 1.9 ‐4.7

1B 1R 1.7 1.4 2.1 ‐4.9

1B 1R 1.5 1.4 2.3 ‐5.1

1B 1R 1.3 1.4 2.5 ‐5.3

1B 1R 1.1 1.4 2.7 ‐5.5

1B 1R 0.9 1.4 2.9 ‐5.7

1B 1R 0.7 1.4 3.1 ‐5.9 08:11

1B 2R 2.1 2.8 3.1 ‐5.9 08:27

1B 2R 1.9 2.8 3.3 ‐6.1 08:31

1B 2R 1.7 2.8 3.5 ‐6.3 08:40

1B 2R 1.5 2.8 3.7 ‐6.5

1B 2R 1.3 2.8 3.9 ‐6.7

1B 2R 1.1 2.8 4.1 ‐6.9

1B 2R 0.9 2.8 4.3 ‐7.1 08:56

1B 2R 0.7 2.8 4.5 ‐7.3 09:00

Very little resistance

Small handfull of material recovered,

sandy clay. No hard material

Slower rate of penetration

↕

↕

↕

↕

↕

↕

Zero resistance ‐ firm sandy bottom

underfoot

Very small recovery in the splits, few

small pieces of coral


TIME START TIDE 1.0

REQUESTED LAT

DEPTH


FINAL DRILL LAT

BELOW SEABED




REQUIRED DRILL DEPTH BSB

15‐Aug‐17

07:55

C.Rutter

‐1.4

‐7.0 5.6 5.9FINAL

LAT‐7.3

CountMast

Marker

Rod


1B 2.4 0 0.0 ‐1.4 07:34

1B 2.2 0 0.2 ‐1.6

1B 2.0 0 0.4 ‐1.8

1B 1.8 0 0.6 ‐2.0

1B 1.6 0 0.8 ‐2.2

1B 1.4 0 1.0 ‐2.4

1B 1.2 0 1.2 ‐2.6

1B 1.0 0 1.4 ‐2.8

1B 0.8 0 1.6 ‐3.0

1B 0.7 0 1.7 ‐3.1 07:36

1B 1R 2.1 1.4 1.7 ‐3.1 07:42

1B 1R 1.9 1.4 1.9 ‐3.3

1B 1R 1.7 1.4 2.1 ‐3.5

1B 1R 1.5 1.4 2.3 ‐3.7

1B 1R 1.3 1.4 2.5 ‐3.9

1B 1R 1.1 1.4 2.7 ‐4.1

1B 1R 0.9 1.4 2.9 ‐4.3

1B 1R 0.7 1.4 3.1 ‐4.5 07:45

1B 2R 2.1 2.8 3.1 ‐4.5 07:52

1B 2R 1.9 2.8 3.3 ‐4.7

1B 2R 1.7 2.8 3.5 ‐4.9

1B 2R 1.5 2.8 3.7 ‐5.1

1B 2R 1.3 2.8 3.9 ‐5.3

1B 2R 1.1 2.8 4.1 ‐5.5

1B 2R 0.9 2.8 4.3 ‐5.7

1B 2R 0.7 2.8 4.5 ‐5.9 07:55

1B 3R 2.1 4.2 4.5 ‐5.9 08:04

1B 3R 1.9 4.2 4.7 ‐6.1

1B 3R 1.7 4.2 4.9 ‐6.3

1B 3R 1.5 4.2 5.1 ‐6.5

1B 3R 1.3 4.2 5.3 ‐6.7

1B 3R 1.1 4.2 5.5 ‐6.9 08:06

1B 3R 0.9 4.2 5.7 ‐7.1

1B 3R 0.7 4.2 5.9 ‐7.3 08:09




Slight resistance on feed

Final Drill depth

Nil resistance on the feed



REQUESTED LAT


FINAL DRILL DEPTH

BELOW SEABED





J.Hayes

‐0.8

‐7.0 6.2 7.3FINAL

LAT‐8.1

CountMast

Marker

Rod


1B 2.4 0 0.0 ‐0.8 10:58

1B 2.2 0 0.2 ‐1.0

1B 2.0 0 0.4 ‐1.2

1B 1.8 0 0.6 ‐1.4

1B 1.6 0 0.8 ‐1.6

1B 1.4 0 1.0 ‐1.8

1B 1.2 0 1.2 ‐2.0

1B 1.0 0 1.4 ‐2.2

1B 0.8 0 1.6 ‐2.4

1B 0.7 0 1.7 ‐2.5 11:00

1B 1R 2.1 1.4 1.7 ‐2.5 11:05

1B 1R 1.9 1.4 1.9 ‐2.7

1B 1R 1.7 1.4 2.1 ‐2.9

1B 1R 1.5 1.4 2.3 ‐3.1

1B 1R 1.3 1.4 2.5 ‐3.3

1B 1R 1.1 1.4 2.7 ‐3.5

1B 1R 0.9 1.4 2.9 ‐3.7

1B 1R 0.7 1.4 3.1 ‐3.9 11:07

1B 2R 2.1 2.8 3.1 ‐3.9 11:15

1B 2R 1.9 2.8 3.3 ‐4.1

1B 2R 1.7 2.8 3.5 ‐4.3

1B 2R 1.5 2.8 3.7 ‐4.5

1B 2R 1.3 2.8 3.9 ‐4.7

1B 2R 1.1 2.8 4.1 ‐4.9

1B 2R 0.9 2.8 4.3 ‐5.1

1B 2R 0.7 2.8 4.5 ‐5.3 11:15

1B 3R 2.1 4.2 4.5 ‐5.3 11:23

1B 3R 1.9 4.2 4.7 ‐5.5

1B 3R 1.7 4.2 4.9 ‐5.7

1B 3R 1.5 4.2 5.1 ‐5.9

1B 3R 1.3 4.2 5.3 ‐6.1

1B 3R 1.1 4.2 5.5 ‐6.3

1B 3R 0.9 4.2 5.7 ‐6.5

1B 3R 0.7 4.2 5.9 ‐6.7 11:24

1B 4R 2.1 5.6 5.9 ‐6.7 11:31

1B 4R 1.9 5.6 6.1 ‐6.9

1B 4R 1.7 5.6 6.3 ‐7.1

1B 4R 1.5 5.6 6.5 ‐7.3

1B 4R 1.3 5.6 6.7 ‐7.5

1B 4R 1.1 5.6 6.9 ‐7.7

1B 4R 0.9 5.6 7.1 ‐7.9

1B 4R 0.7 5.6 7.3 ‐8.1 11:41

slight resistance on the feed



REQUESTED LAT


FINAL DRILL DEPTH

BELOW SEABED





T.Whitham

‐2.3

‐7.0 4.7 5.9FINAL

LAT‐8.2

CountMast

Marker

Rod


1B 2.4 0 0.0 ‐2.3 14:25

1B 2.2 0 0.2 ‐2.5

1B 2.0 0 0.4 ‐2.7

1B 1.8 0 0.6 ‐2.9

1B 1.6 0 0.8 ‐3.1

1B 1.4 0 1.0 ‐3.3

1B 1.2 0 1.2 ‐3.5

1B 1.0 0 1.4 ‐3.7

1B 0.8 0 1.6 ‐3.9

1B 0.7 0 1.7 ‐4.0 14:26

1B 1R 2.1 1.4 1.7 ‐4.0 14:31

1B 1R 1.9 1.4 1.9 ‐4.2

1B 1R 1.7 1.4 2.1 ‐4.4

1B 1R 1.5 1.4 2.3 ‐4.6

1B 1R 1.3 1.4 2.5 ‐4.8

1B 1R 1.1 1.4 2.7 ‐5.0

1B 1R 0.9 1.4 2.9 ‐5.2

1B 1R 0.7 1.4 3.1 ‐5.4 14:37

1B 2R 2.1 2.8 3.1 ‐5.4 14:50

1B 2R 1.9 2.8 3.3 ‐5.6

1B 2R 1.7 2.8 3.5 ‐5.8

1B 2R 1.5 2.8 3.7 ‐6.0

1B 2R 1.3 2.8 3.9 ‐6.2

1B 2R 1.1 2.8 4.1 ‐6.4

1B 2R 0.9 2.8 4.3 ‐6.6

1B 2R 0.7 2.8 4.5 ‐6.8 14:54

1B 3R 2.1 4.2 4.5 ‐6.8 15:02

1B 3R 1.9 4.2 4.7 ‐7.0

1B 3R 1.7 4.2 4.9 ‐7.2

1B 3R 1.5 4.2 5.1 ‐7.4

1B 3R 1.3 4.2 5.3 ‐7.6

1B 3R 1.1 4.2 5.5 ‐7.8 15:06

1B 3R 0.9 4.2 5.7 ‐8.0

1B 3R 0.7 4.2 5.9 ‐8.2 15:07

No resistance on feed Handful of small pebbles 20 to 30mm

Slight resistance on the feed Small pebbles 20 to 30mm

No resistance on feed



REQUESTED LAT






FINAL DRILL DEPTH

BELOW SEABED

T.Whitham

1.3

‐7.0 8.3 4.5FINAL

LAT‐3.2

CountMast

Marker

Rod


1B 2.4 0 0.0 1.3 12:12

1B 2.2 0 0.2 1.1

1B 2.0 0 0.4 0.9

1B 1.8 0 0.6 0.7

1B 1.6 0 0.8 0.5

1B 1.4 0 1.0 0.3

1B 1.2 0 1.2 0.1

1B 1.0 0 1.4 ‐0.1

1B 0.8 0 1.6 ‐0.3

1B 0.7 0 1.7 ‐0.4 12:14

1B 1R 2.1 1.4 1.7 ‐0.4

1B 1R 1.9 1.4 1.9 ‐0.6

1B 1R 1.7 1.4 2.1 ‐0.8

1B 1R 1.5 1.4 2.3 ‐1.0

1B 1R 1.3 1.4 2.5 ‐1.2

1B 1R 1.1 1.4 2.7 ‐1.4

1B 1R 0.9 1.4 2.9 ‐1.6

1B 1R 0.7 1.4 3.1 ‐1.8

1B 2R 2.1 2.8 3.1 ‐1.8 13:30

1B 2R 1.9 2.8 3.3 ‐2.0

1B 2R 1.7 2.8 3.5 ‐2.2

1B 2R 1.5 2.8 3.7 ‐2.4

1B 2R 1.3 2.8 3.9 ‐2.6

1B 2R 1.1 2.8 4.1 ‐2.8

1B 2R 0.9 2.8 4.3 ‐3.0

1B 2R 0.7 2.8 4.5 ‐3.2 13:45

Drilling was slow and choking resistance

on the outer tube which slowed the

rotation

Final depth attained



rotation

DATE 15‐Aug‐17 DIVER DEPTHLAT

TIME START 12:12 TIDE

REQUESTED LAT



0.2

1.5




FINAL DRILL DEPTH

BELOW SEABED

J Hayes

1.3

‐7.0 8.3 2.5FINAL

LAT‐1.2

CountMast

Marker

Rod


1B 2.4 0 0.0 1.3

1B 2.2 0 0.2 1.1

1B 2.0 0 0.4 0.9

1B 1.8 0 0.6 0.7

1B 1.6 0 0.8 0.5

1B 1.4 0 1.0 0.3

1B 1.2 0 1.2 0.1

1B 1.0 0 1.4 ‐0.1

1B 0.8 0 1.6 ‐0.3

1B 0.7 0 1.7 ‐0.4 12:14

1B 1R 2.1 1.4 1.7 ‐0.4

1B 1R 1.9 1.4 1.9 ‐0.6

1B 1R 1.7 1.4 2.1 ‐0.8

1B 1R 1.5 1.4 2.3 ‐1.0

1B 1R 1.3 1.4 2.5 ‐1.2



rotation

REQUESTED LAT


FINAL DRILL DEPTH

BELOW SEABED




rotation

Redrill of DL10





CLIENT / PROJECT OMSB / MARITIME CONSTRUCTION DRILL SITE No. DL10A DIVER

C.Rutter

‐0.6

‐9.0 8.4 8.7FINAL

LAT‐9.3

CountMast

Marker

Rod


1B 2.4 0 0.0 ‐0.6 08:31

1B 2.2 0 0.2 ‐0.8

1B 2.0 0 0.4 ‐1.0

1B 1.8 0 0.6 ‐1.2

1B 1.6 0 0.8 ‐1.4

1B 1.4 0 1.0 ‐1.6

1B 1.2 0 1.2 ‐1.8

1B 1.0 0 1.4 ‐2.0

1B 0.8 0 1.6 ‐2.2

1B 0.7 0 1.7 ‐2.3 08:33

1B 1R 2.1 1.4 1.7 ‐2.3 09:03

1B 1R 1.9 1.4 1.9 ‐2.5

1B 1R 1.7 1.4 2.1 ‐2.7

1B 1R 1.5 1.4 2.3 ‐2.9

1B 1R 1.3 1.4 2.5 ‐3.1

1B 1R 1.1 1.4 2.7 ‐3.3

1B 1R 0.9 1.4 2.9 ‐3.5

1B 1R 0.7 1.4 3.1 ‐3.7 09:05

1B 2R 2.1 2.8 3.1 ‐3.7 09:16

1B 2R 1.9 2.8 3.3 ‐3.9

1B 2R 1.7 2.8 3.5 ‐4.1

1B 2R 1.5 2.8 3.7 ‐4.3

1B 2R 1.3 2.8 3.9 ‐4.5

1B 2R 1.1 2.8 4.1 ‐4.7

1B 2R 0.9 2.8 4.3 ‐4.9

1B 2R 0.7 2.8 4.5 ‐5.1 09:22

1B 3R 2.1 4.2 4.5 ‐5.1 09:34

1B 3R 1.9 4.2 4.7 ‐5.3

1B 3R 1.7 4.2 4.9 ‐5.5

1B 3R 1.5 4.2 5.1 ‐5.7

1B 3R 1.3 4.2 5.3 ‐5.9

1B 3R 1.1 4.2 5.5 ‐6.1

1B 3R 0.9 4.2 5.7 ‐6.3

1B 3R 0.7 4.2 5.9 ‐6.5 09:37

1B 4R 2.1 5.6 5.9 ‐6.5 09:45

1B 4R 1.9 5.6 6.1 ‐6.7

1B 4R 1.7 5.6 6.3 ‐6.9

1B 4R 1.5 5.6 6.5 ‐7.1 09:48

1B 4R 1.3 5.6 6.7 ‐7.3

1B 4R 1.1 5.6 6.9 ‐7.5

1B 4R 0.9 5.6 7.1 ‐7.7

1B 4R 0.7 5.6 7.3 ‐7.9 09:55

1B 5R 2.1 7.0 7.3 ‐7.9 10:13

1B 5R 1.9 7.0 7.5 ‐8.1

1B 5R 1.7 7.0 7.7 ‐8.3

1B 5R 1.5 7.0 7.9 ‐8.5

1B 5R 1.3 7.0 8.1 ‐8.7

1B 5R 1.1 7.0 8.3 ‐8.9 10:19

1B 5R 0.9 7.0 8.5 ‐9.1

1B 5R 0.7 7.0 8.7 ‐9.3 10:21

Slight resistance

Nil resistance



REQUESTED LAT






FINAL DRILL DEPTH

BELOW SEABED

D. Mellett

‐3.1

‐9.0 5.9 1.7FINAL

LAT‐4.8

CountMast

Marker

Rod


1B 2.4 0 0.0 ‐3.1

1B 2.2 0 0.2 ‐3.3

1B 2.0 0 0.4 ‐3.5

1B 1.8 0 0.6 ‐3.7

1B 1.6 0 0.8 ‐3.9

1B 1.4 0 1.0 ‐4.1

1B 1.2 0 1.2 ‐4.3

1B 1.0 0 1.4 ‐4.5

1B 0.8 0 1.6 ‐4.7

1B 0.7 0 1.7 ‐4.8

Barrel stuck

Redo borehole



REQUESTED LAT


FINAL DRILL DEPTH

BELOW SEABED





S.Franko

‐3.4

‐9.0 5.6 5.9FINAL

LAT‐9.3

CountMast

Marker

Rod


1B 2.4 0 0.0 ‐3.4 07:35

1B 2.2 0 0.2 ‐3.6

1B 2.0 0 0.4 ‐3.8

1B 1.8 0 0.6 ‐4.0

1B 1.6 0 0.8 ‐4.2 07:40

1B 1.4 0 1.0 ‐4.4 07:46

1B 1.2 0 1.2 ‐4.6

1B 1.0 0 1.4 ‐4.8

1B 0.8 0 1.6 ‐5.0

1B 0.7 0 1.7 ‐5.1 07:55

1B 1R 2.1 1.4 1.7 ‐5.1 08:18

1B 1R 1.9 1.4 1.9 ‐5.3

1B 1R 1.7 1.4 2.1 ‐5.5

1B 1R 1.5 1.4 2.3 ‐5.7 08:19

1B 1R 1.3 1.4 2.5 ‐5.9 08:21

1B 1R 1.1 1.4 2.7 ‐6.1

1B 1R 0.9 1.4 2.9 ‐6.3 08:24

1B 1R 0.7 1.4 3.1 ‐6.5 08:26

1B 2R 2.1 2.8 3.1 ‐6.5 08:39

1B 2R 1.9 2.8 3.3 ‐6.7

1B 2R 1.7 2.8 3.5 ‐6.9

1B 2R 1.5 2.8 3.7 ‐7.1 08:43

1B 2R 1.3 2.8 3.9 ‐7.3

1B 2R 1.1 2.8 4.1 ‐7.5

1B 2R 0.9 2.8 4.3 ‐7.7

1B 2R 0.7 2.8 4.5 ‐7.9 08:48

1B 3R 2.1 4.2 4.5 ‐7.9 09:11

1B 3R 1.9 4.2 4.7 ‐8.1

1B 3R 1.7 4.2 4.9 ‐8.3

1B 3R 1.5 4.2 5.1 ‐8.5

1B 3R 1.3 4.2 5.3 ‐8.7

1B 3R 1.1 4.2 5.5 ‐8.9

1B 3R 0.9 4.2 5.7 ‐9.1 09:27

1B 3R 0.7 4.2 5.9 ‐9.3 09:29

Slight resistance on the feed


DIVER

LAT

REQUIRED DRILL DEPTH BSB

17‐Aug‐17

07:35

Slight resistance on the feed

Very little resistance on the feed

TOPSIDE COMMENTS

Redrill of DL12

Recovered core ‐ loose pieces of

coral and shell

No core material recovered

3 small pebbles recovered within

the inner tube

Full core recovered. ‐7.9 to 9.3

LAT. Indications of Calcareous

Sandstone and Calcareous

Claystone. Very weakly cemented

Very little resistance on the feed

CLIENT / PROJECT DRILL SITE No. DL12AOMSB / MARITIME CONSTRUCTION

SUBSEA COMMENTS

COORDINATES

DATE DIVER DEPTH 5.1

TIDE 1.7TIME START

115° 07.857

21° 38.692

FINAL DRILL DEPTH

BELOW SEABED

REQUESTED LAT

DEPTH



ABN: 64 625 054 729

Appendix C: Understanding Your Report



Page | 1 ABN: 64 625 054 729

UNDERSTANDING YOUR REPORT

GALT FORM PMP11 Rev2

1. EXPECTATIONS OF THE REPORT

This document has been prepared to clarify what is and is not provided in your report. It is intended to inform you of what your

realistic expectations of this report should be and how to manage your risks associated with the conditions on site.

Geotechnical engineering and environmental science are less exact than other engineering and scientific disciplines. We include

this information to help you understand where our responsibilities begin and end. You should read and understand this

information. Please contact us if you do not understand the report or this explanation. We have extensive experience in a wide

variety of projects and we can help you to manage your risk.

2. THIS REPORT RELATES TO PROJECT-SPECIFIC CONDITIONS

This report was developed for a unique set of project-specific conditions to meet the needs of the nominated client. It took into

account the following:

the project objectives as we understood them and as described in this report;

the specific site mentioned in this report; and

the current and proposed development at the site.

It should not be used for any purpose other than that indicated in the report. You should not rely on this report if any of the

following conditions apply:

the report was not written for you;

the report was not written for the site specific to your development;

the report was not written for your project (including a development at the correct site but other than that listed in the

report); or

the report was written before significant changes occurred at the site (such as a development or a change in ground

conditions).

You should always inform us of changes in the proposed project (including minor changes) and request an assessment of their

impact.

Where we are not informed of developments relevant to your report, we cannot be held responsible or liable for problems that

may arise as a consequence.

Where design is to be carried out by others using information provided by us, we recommend that we be involved in the design

process by being engaged for consultation with other members of the project team. Furthermore, we recommend that we be able

to review work produced by other members of the project team that relies on information provided in our report.

Form PMP11 Rev2 20 October 2015



Page | 2 ABN: 64 625 054 729

3. SOIL LOGS

Our reports often include logs of intrusive and non-intrusive investigation techniques. These logs are based on our interpretation

of field data and laboratory results. The logs should only be read in conjunction with the report they were issued with and should

not be re-drawn for inclusion in other documents not prepared by us.

4. THIRD PARTY RELIANCE

We have prepared this report for use by the client. This report must be regarded as confidential to the client and the client’s

professional advisors. We do not accept any responsibility for contents of this document from any party other than the nominated

client. We take no responsibility for any damages suffered by a third party because of any decisions or actions they may make

based on this report. Any reliance or decisions made by a third party based on this report are the responsibility of the third party

and not of us.

5. CHANGE IN SUBSURFACE CONDITIONS

The recommendations in this report are based on the ground conditions that existed at the time when the study was undertaken.

Changes in ground conditions can occur in numerous ways including anthropogenic events (such as construction or contaminating

activities on or adjacent to the site) or natural events (such as floods, groundwater fluctuations or earthquakes). We should be

consulted prior to use of this report so that we can comment on its reliability. It is important to note that where ground conditions

have changed, additional sampling, testing or analysis may be required to fully assess the changed conditions.

6. SUBSURFACE CONDITIONS DURING CONSTRUCTION

Practical constraints mean that we cannot know every minute detail about the subsurface conditions at a particular site. We use

professional judgement to form an opinion about the subsurface conditions at the site. Some variation to our evaluated conditions

is likely and significant variation is possible. Accordingly, our report should not be considered as final as it is developed from

professional judgement and opinion.

The most effective means of dealing with unanticipated ground conditions is to engage us for construction support. We can only

finalise our recommendations by observing actual subsurface conditions encountered during construction. We cannot accept

liability for a report’s recommendations if we cannot observe construction.

7. ENVIRONMENTAL AND GEOTECHNICAL ISSUES

Unless specifically mentioned otherwise in our report, environmental considerations are not addressed in geotechnical reports.

Similarly, geotechnical issues are not addressed in environmental reports. The investigation techniques used for geotechnical

investigations can differ from those used for environmental investigations. It is the client’s responsibility to satisfy themselves

that geotechnical and environmental considerations have been taken into account for the site.

O:\Administration\Standard Forms and Documents\PMP11-Rev2 Understanding your Report.docx