MINE CLOSURE PLAN to accompany Mining Proposal M70/1275 …

MINE CLOSURE PLAN

to accompany

Mining Proposal

M70/1275

On Reserve 1712 (Lot 578) Russell Road, Wattleup

PROJECT CODE J03566 SITE CODE S0226081

Version 2

30 November 2016 Address Operations Manager HANSON CONSTRUCTION MATERIALS LTD 35 Great Eastern Highway Rivervale WA 6103 Phone 08 9311 8811 [email protected]

Mine Closure Plan M70/1275, Russell Road, Wattleup

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No Mine Closure Plan (MCP) checklist Y/N

NA Page No.

Comments

1 Has the Checklist been endorsed by a senior representative within the tenement holder/operating company? (See bottom of checklist)

Y

2 How many copies were submitted to DMP? Hard Copies = 1 Electronic = 1

Cover Page, Table of Contents 3

Does the cover page include: • Project Title; • Company Name; • Contact Details (including telephone numbers and

email addresses); • Document ID and version number; • Date of submission (needs to match the date of

this checklist).

Y

4 Has a Table of Contents been provided? Y Scope and Project Summary

5 State why the MCP is submitted (as part of a Mining Proposal of a reviewed MCP or to fulfill other legal requirements) Y

Part of ongoing mine management

6

Does the project summary include: • Land ownership details; • Location of the project; • Comprehensive site plan(s); • Background information on the history and status

of the project.

Y

Section 2.0

Legal Obligations and Commitments 7 Has a consolidated summary or register of closure obligations

and commitments been included? Y

Section 3.0

Data Collection and Analysis

8 Has information relevant to mine closure been collected for each domain or feature (including pre-mining baseline studies, environmental and other data)?

Y

Section 4.0

9 Has a gap analysis been conducted to determine if further information is required in relation to closure of each domain or feature?

Y

Section 7.3

Stakeholder Consultation 10 Have all stakeholders involved in closure been identified? Y Section 5.0

11 Has a summary or register of stakeholder consultation been provided, with details as to who has been consulted and the outcomes?

Y

Section 5.0

Final and use(s) and Closure Objectives

12 Does the MCP include agreed post-mining land use(s), closure objectives and conceptual landform design diagram? Y

Section 8.0


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13 Does the MCP identify all potential (or pre-existing) environmental legacies, which may restrict the post mining land use (including contaminated sites)?

Y

Section 6.0

Identification and Management of Closure Issues

14 Does the MCP identify all key issues impacting mine closure objectives and outcomes? Y

Section 6.0 - 8.0

15 Does the MCP include proposed management or mitigation options to deal with these issues? Y

Section 8.0

16 Have the process, methodology, and rationale been provided to justify identification and management of the issues? Y

Section 8.0

Closure Criteria

17 Does the MCP include an appropriate set of specific closure criteria and closure performance indicators? Y

Section 8.0

Closure Financial Provisioning

18 Does the MCP include costing methodology, assumptions and financial provision to resource closure implementation and monitoring?

Y

Section 10.0

19 Does the MCP include a process for regular review of the financial provision? Y

Section 10.0

Closure Implementation

20 Does the reviewed MCP include a summary of closure implementation strategies and activities for the proposed operations or for the whole site?

Y

Section 9.0

21 Does the MCP include a closure work program for each domain or feature? Y

Section 9.0

22 Have site layout plans been provided to clearly show each type of disturbance? Y

Figures

23 Does the MCP contain a schedule of research and trial activities? Y

Section 7.1

24 Does the MCP contain a schedule of progressive rehabilitation activities? Y

Section 8.3 – 12.0

25 Does the MCP include details of how unexpected closure and care and maintenance will be handled?

Y Section 8.4

26 Does the MCP contain a schedule of decommissioning activities? Y

Section 8.0

27 Does the MCP contain a schedule of closure performance monitoring and maintenance activities? Y

Section 9.0

Closure Monitoring and Maintenance

28

Does the MCP contain a framework, including methodology, quality control and remedial strategy for closure performance monitoring including post-closure monitoring and maintenance?

Y

Section 11.0

Closure Information and Data Management

29 Does the mine closure plan contain a description of management strategies including systems, and processes for the retention of mine records?

Y

Section 12.0

30 Confidentiality N/A


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TABLE OF CONTENTS 1.0 SCOPE AND PURPOSE 1 2.0 PROJECT OVERVIEW 1 2.1 Resource Sought 2 2.2 Site layout 3 2.3 Mining Operations 4 2.4 Solid Waste Characterisation 7 2.5 Disturbance Areas 9 3.0 COMPLIANCE WITH LEGISLATION ANE APPROVALS 11 4.0 COLLECTION AND ANALYSIS OF DATA 15 4.1 Regional Setting 15 4.2 Geology - Geomorphology 15 4.3 Soils and Soil Profiles 15 4.4 Climate 16 4.5 Hydrology 16 4.6 Flora and Fauna 16 4.7 Social Environment 17 5.0 STAKEHOLDER CONSULTATION 21 6.0 POST MINING LANDUSE AND CLOSURE OBJECTIVES 24 6.1 Post Mining Landuses and Closure Planning 24 6.2 Disturbance 24 6.3 Closure Objectives 24 7.0 IDENTIFICATION AND MANAGEMENT OF CLOSURE ISSUES 26 7.1 Research 26 7.2 Baseline Data Collection and Analysis 27 7.3 Gap Analysis 27 8.0 DEVELOPMENT OF COMPLETION CRITERIA 27 8.1 Closure Consideration 27 8.2 Closure Objectives and Broad Risk Consideration 29 8.3 Progressive Permanent Closure of Completed Stages of the Pit 32 8.4 Temporary Closure 33 9.0 CLOSURE MONITORING AND MAINTENANCE 35 9.1 Monitoring Procedures and Remediation 35 10.0 FINANCIAL PROVISION FOR CLOSURE 37 11.0 MANAGEMENT OF INFORMATION AND DATA 39 12.0 CLOSURE IMPLEMENTATION 40 12.1 Land Restoration and Rehabilitation 40 12.2 Dieback Management 43 12.3 Weed Management 45 12.4 Surface and Groundwater Water Protection 46


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FIGURES Figure 1 Approved Excavation Area Figure 2 Current Site Activity Figure 3 Concept Final Contour Plan Figure 4 Site Photographs Figure 5 Site Photographs Figure 6 Latitude 32 Development Area 5 TABLES Table 1 Materials Available for Rehabilitation 8 Table 2 Potential “at risk” Inventory 8 Table 3 Disturbance Table 10 Table 4 Relevant Legislation – Legal Register 13 Table 5 Tenement Conditions 14 Table 6 Stakeholder Consultation 23 Table 7 Closure Objectives 30 Table 8 Permanent Closure Procedures 32 Table 9 Temporary Closure Procedures 34 Table 10 Monitoring Procedures 36 Table 11 Closure Cost Estimates 38 ATTAVHMENT Environmental Risk Analysis of Closure Prepared by Lindsay Stephens BSc Geology), MSc (Plant Ecology) 25 Heather Road Roleystone WA 6111 Mem Aus Geomechanics Soc – MEIANZ – FIQA Tel 9397 5145, [email protected]


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1.0 SCOPE AND PURPOSE This Mine Closure Plan is submitted to fulfill the requirements of the tenement conditions and to prescribe the methods that will be used for mine closure.

2.0 PROJECT OVERVIEW M70/1275 was applied for on 25 July 2007, and granted to Rocla Pty Ltd, for 21 years from 13 August 2009. Rocla Pty Ltd was taken over by Hanson Construction Materials Ltd who are the current tenement holder. The Mine Closure Plan was submitted originally in 2014 with a Mining Proposal which only covered the western half of M70/1275. This Mine Closure Plan is a review and update of the 2014 document. M70/1275 lies within the Hope Valley – Wattleup Redevelopment Area (Latitude 32), which has a future use as industrial land under the Hope Valley – Wattleup Redevelopment Act 2000. The excavation of the limestone and sand from the site is encouraged by the Western Australian Planning Commission in order to prepare the site for its final end use as Industrial land. All of M70/1275 lies within Latitude 32 Precinct 5, (Hope Valley Wattleup redevelopment project Master Plan Amendment 14 for advertising April 2016). This proposal is to enable the extraction of sand and limestone from M70/1275, to prepare the site for an industrial land use and to bring the land surface into line with the proposed final contours of Latitude 32 Structure Plan. In doing so materials will have to be removed from site and these will be used to meet community needs for limestone and sand in the Perth Metropolitan Area. These aims are consistent with the Hope Valley Wattleup Redevelopment Act 2000, which is managed by Latitude 32. The proposal achieves the dual purposes of extracting a valuable resource in line with State Planning Policy No 2.4 Basic Raw Materials. The document has been prepared primarily to satisfy the requirements of the Department of Mines and Petroleum (DMP) pursuant to the Mining Act 1978. As the sand overlies high grade limestone, and the limestone will be exposed by sand excavation, the limestone is also proposed to be taken. The approved area was cleared in November 2016 and bunds formed around the perimeter. Excavation is yet to commence but is anticipated to start in early 2017.


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CONTACTS Contact Operations Manager Address HANSON CONSTRUCTION MATERIALS LTD 35 Great Eastern Highway Rivervale WA 6103 Phone 08 9311 8811 [email protected] LOCATION

M70/1275 is located on the southern side of Russell Road, between Moylan Road and Power Avenue. M70/1275 is concurrent with Reserve 1712 on Lot 578, is Crown land of 27.8525 hectares, and vested in the City of Cockburn for "Government Purposes". Access will be from the south eastern corner of the pit near Phillips Road. It lies on Perth 1 : 250 000 geological mapsheet; SH50-14 within the City of Cockburn. The approved extraction area lies within latitude 32 Development Area 5.

2.1 Resource Sought

Sand and limestone occur in the Spearwood Land System. Both resources are used for the construction industry but generally lie under land considered as prime land for urban and other development. Remnant vegetation on the Spearwood Land System in other locations, that is in good condition, is considered as having conservation value thereby reducing the potential for extraction in those locations. This has led to a situation where there are few limestone resources remaining within the southern Perth Metropolitan Area. The Hope Valley Wattleup Redevelopment Area is part of the last remaining high grade limestone resources left within the southern Perth metropolitan area, with little to no limestone available from Baldivis to south of Mandurah and no high grade limestone available between Baldivis and south of Bunbury. The whole site is underlain by high grade limestone. The limestone has always been earmarked for extraction and has formed a key part of the resources held in the Hope Valley Wattleup Redevelopment Area. The vegetation on site is significantly disturbed and is regarded as being in Degraded Condition. From the drill data and visual examination of limestone in the field the limestone is variable in grade with a substantial resource of quality limestone, exceeding 70%. This limestone is well suited to armour rock, road bases, reconstituted limestone blocks and perhaps dimension stone. The sand is yellow silica sand with light brown and white variations. Uses of the Limestone Basic raw materials are essential for the construction and maintenance of all developments; such as roads, subdivisions, buildings, bridges, ports and rail lines.


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• Almost every house on the Swan Coastal Plain is constructed using significant amounts of construction materials including sand for concrete and fill.

• Every road on the Swan Coastal Plain is constructed from limestone.

• The use of the limestone depends on the nature of the limestone, its colour, grade and

percentage of CaCO3. These characteristics vary quite quickly both laterally and vertically and as they change the limestone will be extracted for other purposes. The main use will be road bases.

• Sand is used for a variety of purposes but mainly for fill and concrete sand with some

potential specialty uses such as Brickies sand and plasterers sand if suitable. 2.2 Site Layout

The only processing that will occur on site is crushing and screening of limestone using mobile plant. There are unlikely to be any facilities located on site as all support is provided from adjoining limestone extraction operations. However an area for a site office and compound has been allocated and approved. All surface water generated from precipitation will congregate on the floor of the pit and then infiltrate into the floor of the pit or evaporate. Therefore all surface water generated in the pit will be retained within the pit. Dust, noise and other environmental issues are to be managed by methods outlined in the Mining Proposal and the Dust Management Plan approved by the City of Cockburn. Water for dust suppression is to be brought to site as required. All materials and wastes from maintenance are recovered and recycled where possible, or taken to an approved waste disposal site if they cannot be reused. Vegetation and topsoil cleared ahead of excavation is stored in low bunds at the perimeter of the site, outside the perimeter safety bunding formed from overburden. The approved area is cleared. No ground is yet available for rehabilitation because the pit floor is yet to commence. The limestone is to be crushed and screened on the floor of the pit near the active face to reduce internal vehicle movements, using mobile crushing and screening plant that moves across the floor as the excavation proceeds. As all activities progress across the site there can be no definitive operational area placed on a plan. The location of particular features can only be placed on a plan at one point in time. There will be no waste product storage, tailings or tailings ponds as these are not part of the operations. Sand and limestone extraction is a very clean operation using a loader to excavate, process and load. The only requirements are lubricants for the plant and equipment. A screening plant will be used on site from time to time as required to ensure the sand and limestone meets specification. Stockpiles will be intermittently used, depending on the nature of the market or contract being filled, to store screened sand. Where sand is excavated directly from the face to road trucks stockpiles are not required.


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A small amount of limestone will be used on site for use in internal road making.

2.3 Mining Operations The excavation of limestone and sand will be cut to a flat floor by gradually opening new ground as excavated ground is closed and rehabilitated to industrial end use requirements of the Latitude 32 final contour plan (Currently the Hope Valley-Wattleup Master Plan 2004). The excavation has been limited to the western portion of the site, west of the powerline, north of Phillips Road (Development Area 5 in the Master Plan). Development Area 5 is still in the preliminary planning stages with a future end use of Industrial land and possibly intermodal. Landcorp November 2016. The floor is limited to the Latitude 32 Development of Land Policy – Project Area and Earthworks Concept Plan. Structure planning is to commence in 2016, but in earlier versions a floor elevation of 16 metres in the west, rising to 20 metres in the east was proposed. The excavation will target high grade limestone and so, in parts, the floor may be cut lower and backfill used to raise the floor elevation. Environmental Restrictions There are no environmental restrictions related to this site. The site is cleared ready for excavation. Design of the Pit - Staging The approved western half of M70/1275 is cleared. The excavations are designed to remove the sand and the limestone until it bottoms on sand or reaches the final land surface as dictated by Latitude 32 Development Area 5. It is possible that a particular product will be excavated lower in one part and then back filled and compacted to return the floor to the design level.

The natural land surface prior to excavation rises from 15 metres AHD in the west where old excavation has occurred to 40 metres AHD in the north eastern corner.

Government Policies currently provide for a separation of 2 metres to the watertable outside Priority 1 Groundwater Protection Areas. As the groundwater lies at around 0 – 1 metres AHD (Perth Groundwater Atlas), excavation can extend to the design depth of around 16 Metres AHD rising to the east without impediment. At the end of excavation the floor of the quarry will be prepared to the requirements of the Latitude 32 Development Area 5. At this stage the floor of the pit is proposed to be formed to hardstand in compliance with Landcorp and the Hope Valley Wattleup Redevelopment Area Master Plan. The batter slopes will then rise gently up the existing natural land surface outside the excavation area at slopes of 1 : 2 – 1 : 4 vertical to horizontal and the floor will daylight out to the lower elevations such as to the east.


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Ground Preparation 1. The approved western portion of the tenement is now cleared active. 2. Topsoil was pushed to one side and formed into storage bunds for later use for

rehabilitation. The majority of the site however has been cleared but the topsoil not yet removed.

3. Overburden as yellow and brown sand and low grade limestone was then pushed into

bunds and dumps and is partially being used. 4. The bunds and dumps are up to 3 metres high depending on the surrounding landform and

security requirements to increase security and provide a barrier to define the operations. 5. This bunding is extended along the perimeters to provide screening and assist in security. 6. The interim floor design rises from 16 metres AHD in the west, rising to 20 metres

dependant on the Master Plan Final Contours. The final contours continue to be adjusted and have not been settled at this point in time for Development Area 5.

7. After mining, the final slopes will be brought into compliance with the Latitude 32 final

contour plan (Currently the Hope Valley-Wattleup Master Plan) and in compliance with the Mines Safety and Inspection Act (1994) and Regulations (1995).

8. Rehabilitation will be conducted at the end of excavation and progressively where possible,

to stabilize the site to the requirements of the Manager of Latitude 32.

Excavation Limestone can be taken for several types of products. It is possible that dimension stone blocks could be cut, but at this stage that is not anticipated. Other limestone will be taken from site as rubble, roadbase or reconstituted blocks. An anticipated production of 100 000 tonnes per year of limestone and sand is proposed, depending on contracts won. It is anticipated that a larger tonnage will be taken in some years to fill large contracts such as major coastal and construction works in the Jervis Bay or fill in the local area. When larger contracts are being filled perhaps 200 000 tonnes of material may leave the site in a particular year.

• Limestone Extraction – Roadbase and Rubble Excavation will be carried out as a sequence.

1. The excavation will be similar to past excavation on the adjoining lot to the west and all

other quarries in the area. 2. Where practicable the topsoil still to be removed will be transferred to an area being

rehabilitated or stored for later use subject to discussions with Landcorp. 3. Overburden, as yellow and brown sand and low grade limestone, is removed by pushing to

the perimeter of the proposed pit to form perimeter bunding to the pit. 4. This bunding will be pushed along Russell Road, Torgoyle Road and Phillips Road is

already in place and will be 3 metres high to assist visual, acoustic and dust screening. 5. Excess overburden is either directly transferred to a rehabilitation area or stored in low

dumps and bunds for later rehabilitation use.


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6. Where sand overlies the limestone, sand will be taken to expose the limestone. 7. Limestone is to be excavated from behind perimeter bunding to the floor elevation

determined by the Latitude 32 Earthworks Concept Plan, that is 16 metres AHD in the west, rising to 20 metres AHD in the east.

8. During excavation the limestone will be deep ripped with a bulldozer pushing down a

sloping face below the elevation of the perimeter bunding. 9. In the process the limestone is track rolled as the bulldozer pushes, and this crushes the

limestone. 10. The rubble produced is pushed into a stockpile from which it is loaded directly into road

trucks for taking offsite for use as roadbase, raw feed for reconstituted block making, or for clinker manufacture.

11. To produce various sized products for road bases the rubble may need to be crushed and

screened. A loader will take material from the rubble stockpile created by the bulldozer and will then load it into a mobile crusher for reduction to the required size.

12. Water will be used for dust suppression, to reduce the potential for dust generation from the

movement of machinery and the effect of wind. 13. Blasting is not part of the normal operations to produce road base. 14. Subgrade material and overburden will normally be stored in the bunds around the

perimeter of the pit and then used to recontour the completed pit as the first stage of rehabilitation.

15. At the end of excavation the floor of the quarry will be prepared to the requirements of the

Latitude 32 Manager and the Hope Valley Wattleup Redevelopment Area Master Plan Development Area 5.

16. To minimise any dust risk bare ground likely to generate dust will be treated to mitigate the

risk. A Dust Management Plan for excavation has been approved by DMP and the City of Cockburn.

Limestone Armour Stone 1. Armour stone is the production of large boulders of several sizes for use in coastal

construction. Normally only the harder recalcified surface rock is used. This is only available in the west of the excavation area.

2. Rock of suitable size for armour stone will simply be sorted and set aside during excavation.

There will be no blasting or rock breaking used to produce this material. 3. The market for armour stone is very intermittent and limited, and it is not currently proposed

to produce this material. If at the end of excavation armour rock remains, it will either be removed to another location for storage or broken up and used for roadbase.

Processing

• Limestone All static and operational equipment will work on the quarry floor to provide maximum sound and visual screening wherever possible.


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Limestone 1. A mobile crushing plant and screens are to be used to prepare construction materials. 2. Crushing plants and screens will be licensed or registered through DER as required for the

site or as a mobile plant. An application for a DER Licence is in progress. 3. Annual throughput is anticipated to be 100 000 but up to 200 000 tonnes could be taken in

any particular year as a result of the number and type of contracts won. 4. Mobile crushing plants are used. Any mobile crushing plant will be licensed through the

DER if throughput is 5 000 – 50 000 tonnes of screening conducted per year (Category 70) with Category 12 in excess of 50 000 tonnes per year. The DER Licence is in the process of application.

5. All static and mobile equipment such as the loader, transport, crushers and screens will be

located on the floor of the quarry to provide visual and acoustic screening. Stockpiles of products will be retained on the floor of the pit to reduce visual impact.

6. From the crusher the product will be screened and a series of stockpiles formed by a

classifier, which is essentially a series of conveyor belts that form stockpiles of various grades of material.

7. Small amounts of bitumen stabilised road base products may be produced. In this case

limestone road base is mixed with a small volume of bitumen emulsion (about 2%) for use in road base and construction materials in a small mobile screening plant.

8. Any processing plant will be located on the floor of the pit and will move forward as the

excavation moves forward. Sand Normally sand is not processed for use as fill, but there may be a need to dry screen the sand on the floor of the pit for concrete or other use. A screening plant may also be used for the separation of limestone from sand or for the production of concrete sand. This plant, if used, will be a small mobile plant that will be moved from time to time, as the face moves. Any screening will be licensed through the DER, as required for the site or plant, depending on the annual throughput if 5 000 – 50 000 tonnes of screening is conducted per year (Category 70) with Category 12 in excess of 50 000 tonnes per year. Screening of sand, if undertaken is unlikely to exceed 5 000 tonnes per year. An application for a DER Licence is in progress. All screening operatinons will be located on the floor of the pit and will move forward as the excavation moves forward.

2.4 Soil and Waste Characterisation

Topsoil is comprised of natural sand that is typical of the soils across limestone. Overburden is comprised of sand and low grade limestone fragments and rock. It is natural, and pushed, just cleared, from ahead of mining. The only processing is crushing and screening of some of the limestone and screening of some sand. Little subgrade material is produced and that is natural limestone.


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There are no deleterious materials formed from the extraction of limestone. There are no heavy minerals, radioactive substances, acidic materials or metallic elements etc, only natural soil materials. The only waste materials are from normal operational activities, of waste containers, paper, plastic, wood, old pallets and equipment, etc which are periodically removed from site to an approved landfill area. Materials Suitable for Rehabilitation

Available Required for Closure

Volume of topsoil Site is cleared but the topsoil remains across most of the site. Around 3 000 m3 currently stored in perimeter bunds

Perimeter bunding 5 000 m3

Volume of overburden Used to form the existing screening bunds and available for site restoration. Additional overburden will be recovered during excavation. Around 6 000 m3 of overburden is currently stored in perimeter bunds with another 50 000 m3 plus available

Perimeter bunding 15 000 m3 plus; Floor of the pit 40 000 m3 (If Landcorp determine that overburden is to be sheeted across the floor)

Volume of waste rock None likely to be generated Volume of other growth medium

Not required

Volume of other suitable capping material

Not required

Table 1 Materials Available for Rehabilitation Tailings Storage

This is covered by 2.4 Waste Rock and Tailings of the Mining Proposal. There will be no waste rock. There are no chemical treatments of the sand or limestone and no excavation of deeper materials that are not natural colours of surface materials. All overburden or interburden beds and subgrade sand will be used for land restoration and rehabilitation. Potential “at risk” Waste Inventory - Characterisation

Type Comment Treatment Reference Saline surface water Not present Saline ground water Not present Acidic materials and drainage

Not present

Sodic or dispersive materials

Not present

Asbestos – None present


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asbestiform minerals Radioactive materials Not present Metallic or chemical materials

Not present

Tailings storage

Not required

Ablutions waste

Not present Serviced from adjoining operations.

Fuel - wastes The mobile plant will be refueled from mobile tanker. None will remain on closure.

Any sand or limestone with drips and spills will be removed offsite to an approved waste site.

Service wastes Only minor lubrication will be conducted on site All major servicing will be conducted offsite. None will remain on closure

Any wastes will be collected and removed from site promptly to an approved recycling or waste disposal area.

General waste

None will remain on closure Regularly removed from site to an approved disposal area

Table 2 Potential “at risk” inventory

2.5 Disturbance Areas The proposed total disturbance is shown in the table below. The limestone becomes more sandy towards the north and in the future some sand may be extracted from that location. ACTIVITY TABLE As excavation commences and progresses the open pit will in turn become the processing area, and then will be rehabilitated. The access road will remain and not change substantially, although internal roads will increase slightly. Additional topsoil and overburden will be generated when excavation commences. Currently the surface is totally disturbed, but no rehabilitation has been able to be undertaken because final contours for latitude 32 Precinct 5 is not yet available and the pit is active. The activity table at November 2016 is shown below.


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Table 3 Disturbance Table



3.0 COMPLIANCE WITH LEGISLATION AND APPROVALS M70/1275 lies within the Hope Valley – Wattleup Redevelopment Area (Latitude 32), which has a future use as industrial land under the Hope Valley – Wattleup Redevelopment Act 2000. At the end of excavation the floor of the quarry will be prepared to the requirements of the Latitude 32 Manager (Landcorp) and the Hope Valley Wattleup Redevelopment Area Master Plan. A summary of the main legislation is listed below. From time to time other legislation may be applicable and will be added as revisions are made to the Mine Closure Plans. Relevant Legislation – Legal Register

Legislation Comment Action Mining Act 1978 Approved Rehabilitation Plan in

Mine Closure Plan. The plan has been updated and incorporated into this closure plan.

Aboriginal Heritage Act 1972 No sites are listed on Department of Aboriginal Affairs database. As the site is now cleared for excavation no site is likely to be found. However any aboriginal heritage found during excavation and any ensuing conditions will be complied with.

The DAA database does not record any sites for the disturbance area.

Native Title Act 1993 Predates Native Title Legislation NA Environmental Protection Act 1986 Part IV - Assessment

The whole area was formally assessed under the Environmental Protection Act as a “Assessed Scheme”.

Noted

Environment Protection and Biodiversity Conservation Act 1999 (Commonwealth)

The site is cleared.

Environmental Protection Act 1986 Part V – DER LIcence

When crushing and screening are used the operation may require a Department of Environment Regulation Licence. (Environmental Protection Act 1986, Part V Licence) Mobile plant will be used and licensed accordingly. The nature of the Licence depends on the volume of material to be produced and whether it exceeds 5 000 or 50 000 tonnes per year.

The operations will comply with any DER Licence Conditions. A DER Licence application is currently in progress.

Environmental Protection (Noise) Regulations 1997

There are no nearby sensitive premises, with other quarries in the buffers between M70/1275 and any sensitive premises in all directions.

Comply with the Noise Regulations

Environmental Protection (Clearing of Native Vegetation) Regulations 2004

A Clearing Permit was not required because the Hope Valley Redevelopment Act is an “Assessed Scheme”.

The site is now cleared.



The site is cleared. Contaminated Sites Act 2003 No materials are present or to be

used which would trigger this legislation.

Noted

Wildlife Conservation Act 1950 The approved area is cleared. Noted. Conservation and Land Management Act 1984

The approved area is cleared. See above

Heritage of Western Australia Act 1990

No matters of significance that would trigger this legislation have been identified.

Noted. The approved area is cleared.

Health Act 1911 No matters of significance that would trigger this legislation have been identified.

Waste disposal and health requirements are noted.

Planning and Development Act 2005

The Mining Act 1978 prevails over Planning legislation.

The Local Authority (City of Cockburn) provided comment as required for the project at application and during the Mining Proposal (2014). The City provided Planning Consent and approved the Dust Management Plan.

Waterways Conservation Act 1976 DOW has input into the approval and operational management. There are no waterways on site or nearby.

Noted

State Agreement Acts Not applicable. Noted Dangerous Goods Safety Act 2004 Refers to fuel and explosives No on site storage of fuel is

proposed. Mobile tanker refueling is used.

Rights in Water and Irrigation Act 1914

Managed by DOW. Not applicable to this operation.

Country Areas Water Supply (CAWS) Act 1947. Water Catchments

Not Applicable Noted

Mines Safety and Inspection Act 1994

The site is registered under the SRS and a Project Management Plan submitted and implemented.

Project Management Plan – SRS System

Compliance with the Project Management Plan when it is submitted and approved.

Comply with the plan and any ensuing conditions.

Mining Proposal Operational methods and rehabilitation outlined in the Management Plans, Mining Proposal and Mine Closure Plan are to be complied with.

Noted

Mine Closure Plan The Mine Closure Plan and the included methods and commitments are legally binding.

See Mine Closure Plan and the Mining Proposal for ongoing commitments.

Department of Water Conditions relating to Groundwater extraction.

Groundwater monitoring has been undertaken by Landcorp in 2012 and 2014.

Department of Parks and Wildlife May have some requirements relating to rehabilitation that would be incorporated into conditions on the tenement or included in an updated Mine Closure Plan.

The site is now cleared. Rehabilitation will be to Latitude 32 requirements.



Hope Valley Wattleup Redevelopment Act 2000

Managed by Latitude 32 and Western Australian Planning Commission. A Master Plan for the final end uses and land form is in place.

The final landform will comply with the Master Plan. Latitude 32 Precinct 5.

Table 4 Relevant Legislation – Legal Register



Relevant Tenement Conditions M70/1275 See the actual tenement conditions for the full text of each condition.

SUMMARY OF CONDITION

DISCUSSION AND PROGRESS

1 Lease survey § The lease has been surveyed. 13 – 08 – 2009. § A ground surface survey was completed in November 2016.

2 All surface holes drilled for the purpose of exploration are to be capped and backfilled.

§ Exploratory drilling has been completed. No further drilling is required.

3 All costeans and other disturbances backfilled, made safe and rehabilitated

§ Not applicable as no costeans or exploration are to be undertaken.

4 All waste removed from site § There will be no waste from excavation or activities on site. § Commitments are made to remove rubbish and any generated

wastes. 5 No mining unless approved by

the Environmental Officer of DMP. All topsoil to be retained for use in rehabilitation.

§ Approval to mine is yet to be issued. § This is proposed.

6 No development until the lessee produces a plan of ongoing mining and measures to safeguard the environment.

§ The Mining Proposal constitutes the plan for mining.

10 Storage of hydrocarbons, chemicals and potentially hazardous materials to be stored in accordance with the DOW Guidelines.

§ No such hazardous materials will be stored on site. § Normally fuel will be brought to the site and vehicles filled

from mobile tanker. However there remains the possibility of a fuel tank being retained on site in a fenced, bunded and lined facility for particular projects.

§ All storage will be to DOW and DMP requirements. 19 No mining within 25 metres of

either side of the Petroleum Pipelines as shown in Tengraph.

§ The pipelines lie in the eastern half of the tenement that will not be excavated.

20 No surface excavation approaching closer than 3 times the depth of the excavation for the Safety Zone identified in Condition 19.

§ See above. § The proposed pit will not impact on this Safety Zone.

26 Such conditions to protect the pipeline may be applied from time to time.

§ Noted. § The gas pipeline occurs on the east of the tenement and is

not impacted or influenced by the approved excavation. 27 The lessee loading an

Excavation Management Plan to the satisfaction of the City of Cockburn prior to commencing any activity on the Reserve.

§ This Mining Proposal forms the Excavation Management Plan.

§ The Procedures and commitments made in the Mining Proposal August 2013 will be complied with.

Table 5 Tenement Conditions



4.0 COLLECTION AND ANALYSIS OF DATA EXISTING ENVIRONMENT – PRE MINING

4.1 Regional Setting

The site lies on the western edge of the Swan Coastal Plain that is the surface expression of the Perth Basin. The Perth Basin is filled by up to 10 000 plus metres of mainly Mesozoic Sediments. The upper surface is overlain by Pleistocene coastal dune sequences of which the Spearwood System occurs on M70/1275. The site lies within the Hope Valley – Wattleup Redevelopment Area, in an area that has experienced limestone extraction for many years. M70/1275 is cleared and prepared for excavation.

4.2 Geology – Geomorphology

The limestone and sand formed as aeolian dune deposits behind a shoreline during the Pleistocene. The limestone is ascribed to the Tamala Limestone and consists of foraminifer, shell fragments and quartz grains, and therefore variation in the quality of the stone is normal both laterally and vertically. Tamala Limestone, which is widespread along the coastal area of Western Australia, but is in most areas sterilised by development. The limestone is an aeolian calcarenite (formed from wind blown calcareous sands) derived from beach sands, and over the years has been subjected to solutions which have caused some patches of rock to be harder than others. The Tamala Limestone is covered by shallow, yellow brown, calcareous loamy sands with common limestone outcrop. The age of the limestone is late Pleistocene. In other localities, dates, of between 25 000 and 100 000 years have been obtained for the Tamala Limestone. The original land surface was a ridge of 32 to 44 metres near the northern boundary of M70/1275 dropping to below 30 metres in the south, but this has now been cleared and partially excavated. Sand shed from the weathering limestone provides the soil cover and a sand resource in the south, which is currently being excavated.

4.3 Soils and Soil profiles

Soils were recorded by Lindsay Stephens of Landform Research during the various times the site has been visited. They are part of the Spearwood land system. Soils on the site consist predominantly of yellow brown sands over limestone outcrop/bedrock. The soils are classified as Cottesloe soils; Uc1.23 (Northcote). Generally the soil is deeper in the swales where it grades into brown and yellowish brown sands. In areas of deeper sand, such as the south, the soils are deeper yellow siliceous sand. Colour relates to the species and intensity of iron oxide present. The tenement is cleared and the soils stockpiled for rehabilitation.



4.4 Climate

The climate of the area is Mediterranean with warm to hot summers and cool wet winters. The closest recording station is Fremantle which records all weather data. The highest temperatures are in February with near 29o maxima and the lowest are recorded in July with maxima of 16.4o Celsius and 9.8o C minima. Average rainfall for the area is 771 mm of which more than 90% falls in the months April to October inclusive. Evaporation is high and exceeds rainfall in all but the four wettest months, May to September. The prevailing winds are from the south west, particularly in the afternoon. In summer the easterly in the mornings and the sea breeze in the afternoon can be quite strong. Winds at 9.00 am vary from easterly on 49% of the time on summer mornings, with an early sea breeze, and from the south west at 9.00 am on 46% of the summer mornings. Afternoon winds are predominantly south westerly (south to west) for 86% of the time in summer and 40% of the time in winter. These winds are strong and are normally all above 10 kph in summer, ranging up to > 30 kph on 20% of the time. Winter winds are more variable and on average lighter.

4.5 Hydrology Surface Water There is no surface drainage due to the porosity and permeability of the limestone, with precipitation draining to the water table. Groundwater It has been estimated that perhaps <20 % of the rainfall will reach the water table. Drainage of ground water is to the west towards the ocean. The site lies within the Cockburn Groundwater Area GWA11 but is not covered by a Water Resource Protection Policy. Hyd2o investigated the hydrogeology and during monitoring in 2013 and 2014 for Landcorpfound that the maximum groundwater elevation was 1.28 metres and a lowest elevation of 0.04 metres AHD, well below the proposed pit floor.

4.6 Flora & Fauna

Flora The vegetation on the limestone was originally Cottesloe Complex, Central and South, as identified by Heddle et al, 1980, Vegetation Complexes of the Darling System, Western Australia in Atlas of Natural Resources, Darling System, Western Australia, Department of Conservation and Environment. The more sandy soils of the south and east are Karrakatta Complex - Central and South (Heddle et al 1980).



The vegetation was assessed as part of a study by Arthur Weston on 25 March 2004. And by Landform Research on 16 November 2005. During that inspection all species noted were recorded. In addition ten 10 x 10 square metre plots were measured and the total species richness within each plot was counted. The site is cleared and prepared for excavation. Fauna A fauna study was not conducted because biodiversity was considered within the Hope Valley Wattleup Redevelopment Area Biodiversity Studies conducted for that project. The site is cleared. The site is cleared and prepared for excavation.

4.7 Social Environment 4.7.1 Planning The State Planning Policy Framework provides for the implementation of a planning framework through the recognition and implementation of Regional Planning Policies above Local Planning Schemes and Policies. Within each layer of planning, there are a number of key policies and strategies to provide guidance to planning and development to enable sustainable communities to develop, expand and prosper without compromising the environment and future generations. Planning is governed under the Planning and Development Act 2005. This Act enables Government to introduce State and Regional Planning Schemes, Policies and Strategies to provide direction for future planning. The State and Regional Schemes sit above Town Planning Schemes and Strategies introduced by Local Government. The policies have little relevance over mining tenements on Crown Land, but they do have relevance to the local roads, and the recognition of the need for limestone for dwellings, roads and construction. Even though they are implemented under the Planning and Development Act 2005, over which the Mining Act 1978 prevails, the policies have some relevance in providing guidance on the provision of basic raw materials for the community. They also have relevance in that the Department of Mines and Petroleum seeks advice from the Local Authority when assessing mining proposals. Some policies do have relevance such as the State Industrial Buffer Policy and Basic Raw Materials Policy. With respect to the supply of sand and limestone, the overarching document is the;

o State Planning Policy 1.0 State Planning Framework. Complementing this are a number of Relevant State Policies;

o State Planning Policy 2.0, Environment and Natural Resources Policy o State Planning Policy 2.4, Basic Raw Materials o State Planning Policy 4.1, State Industrial Buffer Policy

The policies and their implications are discussed in Section 5.2 Land Use and Community in the Mining Proposal.



State Planning Policy 2.4 recognises the site as Priority Limestone Resource 30/15, and includes it within the Priority Basic Raw Materials Policy area. This policy makes many statements on the intent and actions which local authorities should use to protect and manage basic raw materials. Section 3.4 is very specific in explaining that basic raw materials need identification and protection because of increased urban expansion and conservation measures, (3.4.1), (3.4.2) and (3.4.4). Sections 3.4.5 and 3.4.6 recognise that environmental and amenity matters need to be considered. The policy will be revised following the completion of the Strategic Assessment. State Planning Policy 2.4 is to be updated once the Strategic Assessment is complete. Perth to Peel Green Growth Plan When the Perth to Peel Green Growth Plan is signed off it will carry pre - approval from the Commonwealth under the EPBC Act 1999. The plan will also provide guidance and approval for the extraction of limestone and sand and the future end use as Industrial Land. The site is currently listed as suitable for excavation to basic raw materials. Hope Valley Wattleup Redevelopment Area – Latitude 32 The site is located within the Hope Valley - Wattleup Redevelopment Act 2000, Interim Landuse and development Control Policy Area. This policy classifies the land including Wattleup townsite as General Industry. Currently, interim land surfaces for the site have been developed by the Hope Valley - Wattleup Redevelopment Authority as has a prescription for rehabilitation and landscaping of quarries. The Minister for the Environment made comments (5 November 2004) with respect to excavation within the Hope Valley Redevelopment Area. The EPA’s position contained within that letter was that the extraction of limestone would not be impeded.

The site is vested in the City of Cockburn for its particular requirements. Therefore the City of Cockburn will be contacted prior to completion of the excavation to determine their wishes in respect to final levels and takeover of the site. The Hope Valley - Wattleup Redevelopment Planning Strategy, released in March 2005, lists Lot 308 (covered by M70/1275) as Precinct 5, Transport Industry. Geological Survey Regionally Significant Basic Raw Materials The Western Australian Geological Survey has produced mapping identifying Strategically Important Basic Raw Materials across private land and State Forest. The Geological Survey recognised the limestone resources and surrounding areas as a Strategically Important Basic Raw Material and valuable community asset. State Planning Policy 2.4 recognises M70/1275 as Resource 23/29 and includes it within the Priority Basic Raw Materials Policy area.



4.7.2 Heritage The State Aboriginal Heritage Act 1972 and Heritage of Western Australia Act 1990, and the Commonwealth Environment Protection and Biodiversity Conservation Act 1999 have been considered within this proposal. A search of the Department of Aboriginal Affairs database shows that there are no registered sites on or near the tenement. The site lies within the area identified by the Whadjuk People, Gnaala Karla Booja People Ilua and as it is cleared and under excavation it is unlikely that any archaeological material will remain.

4.7.3 Workforce Induction and Training Hanson Construction Materials and the operator, WA Limestone, are large reputable companies who have induction and training for all their operations with site specific inductions when personnel arrive at site. Safety will be incorporated into the existing Project Management Plans for the site. 4.7.4 Buffers and Setbacks The Hope Valley Wattleup Redevelopment Area Master Plan (Amended March 21013) discusses the Environmental Framework in Part 7 Environment. The Master Plan recommends that a 500 metre generic buffer be considered for “Industry Extractive”. That does not mean that excavation is not permitted closer, but in line with EPA guidance "Separation Distances between Industrial and Sensitive Land Uses", June 2005, it means that potential impacts or restrictions are to be considered within the 500 metre zone. Hanson informed the occupiers of the nearby dwellings prior to commencement of clearing and referred them to information and the complaints procedures The proposal has been designed to comply with the Master Plan. Even though the buffers are less than the generic 500 metre buffer the relevant considerations within the 500 metre buffer zone have been undertaken as recommended by the Master Plan and the EPA Guidance. Some of the dwellings within the 500 metre distance from the edge of the excavation already lie within a buffer to another land use or have a land use on their property that requires similar buffers. For example “agriculture intensive” such as horticulture and “animal husbandry – intensive” have similar buffer considerations to extractive industries. In addition, all of the dwellings listed as lying within 200 metres of the proposed quarry lie within Area B of the Kwinana Policy. They are not sensitive premises under the normal definition but are subject to higher levels of allowable dust and noise, controlled by the Environmental Protection (Kwinana) (Atmospheric Wastes) Regulations 1992 and Environmental Protection (Noise) Regulations 1997. Of the 12 dwellings only 3 lie within the prevailing winds at distances of 130, 110 and 210 metres. The possible dwellings at 130 metres and 110 metres may in fact be sheds; it is unclear from the aerial photography but are counted here as dwellings because of the uncertainty. All other dwelling lie outside the prevailing winds of SSW and E. Whilst the prevailing winds are not the only directions that need to be considered, they are a significant consideration as illustrated by EPA and DEC Policies and Guidelines for Dust which consider the prevailing winds as a highly relevant issue. The distances vary from 70 - 210 metres to the north across Russell Road, 100 – 160 metres east across Power Avenue and 60 – 200 metres across Torgoyle Road.



The main issues relate to Noise, Dust and transport. A noise study has been completed by Herring Storer Acoustics who found that the proposed excavation could comply. Since that study was undertaken the area of the proposed excavation has been restricted to the western half at this time. A comprehensive dust management plan was prepared and has been approved by the DMP and the City of Cockburn. It will be implemented. There are management plans for visual impact, noise and dust, the main impacts that require buffers. Buffers to the Gas Pipelines The buffers to the Gas pipelines are prescribed in the Conditions imposed on M70/1275, 19 to 26 The pipelines lie well east from the approved foot print and do not apply. The buffers are 150 metres separation for blasting. No Blasting is proposed. A lateral setback of 25 metres with a minimum 1 : 2 batter slope is used for setback to the pipelines. The edge of the proposed excavation is set back 175 metres from the closest pipeline.



5.0 STAKEHOLDER CONSULTATION A list of stakeholders is shown below and will be updated as required as additional consultation is needed prior to and during operations. This Mine Closure Plan incorporates the approved rehabilitation plan and updates the information as needed.

Preliminary Stakeholder Consultation Table

Date Description of consultation

Stakeholder Stakeholder comment/issue

Hanson Response

Stakeholder Response

At the time of the Mining Proposal lodgment

Discussions and referral

Department of Parks and Wildlife

The site has been assessed under the Hope Valley - Wattleup Industrial Site managed through Latitude 32. The implications of the Perth to Peel Green Growth Plan are noted.

Noted The site is cleared in preparation for excavation.

2014 Discussions and letters.

Western Power

Setbacks to the power line in the east were specified and incorporated into the approved excavation footprint.

Approval to excavate to 30 metres from powerline.

As required A Clearing Permit will be applied for

DER No Clearing Permit was required because the Hope Valley Redevelopment Area is classed as an “Assessed Scheme” under the EP Act.

The site is cleared and ready to be excavated.

Prior to final closure

The closure planning complies with DOW Guidelines

Department of Water

Groundwater monitoring has been undertaken by Landcorp in 2012 and 2014.

Responses to any requests from DOW or Landcorp will be incorporated into final closure planning.

As required Search of DAA databases

Department of Aboriginal Affairs database has been searched and no sites have been found.

No comments are available.

There are no known registered sites on M70/1275 as the site is cleared it is unlikely material will remain.

During 2015 – 2016 as required

Discussions and submission with respect to the Perth to

Department of Premier and Cabinet

M70/1275 is listed as “green” The future end use is Industrial Land.

The site is cleared.



Peel Green Growth Plan

November 2016 Notification of commencement and contacts.

Local residents A complaints, investigation and reporting system is in place and the local residents have been informed.

Previously Referral of Mining Proposal to EPA under Part V of the Environmental Protection Act 1984.

EPA The Mining Proposal was provided with a “Not Assessed”

Prior to commencement and annually

Consultation DMP Resources Safety Division

A Project Management Plan is in place. No comments are currently available.

Hanson will comply with normal safety requirements.

Previously Discussions and review of the documentation.

City of Cockburn

The Mining Proposal was referred to the City.

The City was accepting of the proposal and provided Planning Consent. A comprehensive dust management plan is proposed and has been approved by the DMP and the City of Cockburn.

November 2016 Liaison, site inspection, provision of survey plan.

City of Cockburn

The Mining Proposal was referred to the City.

The City was accepting of the proposal and provided Planning Consent. A comprehensive dust management plan is proposed and has been approved by the DMP and the City of Cockburn.

Annually Consultation AER and MRF and other reporting.

DMP No conditions currently in place.

Comply with tenement conditions

As required Written submissions, meetings and discussions.

Landcorp – Latitude 32

There has been extensive consultation with Landcorp, the managers of Latitude 32, and the City of Cockburn with respect to this

Almost all of M70/1275 lies within Latitude 32 Precinct 5.

The final land surface and rehabilitation is yet to be nominated for Development Area 5 by



specific project and, on a broader scale, many discussions and public meetings between Landcorp (Latitude 32) and the broader community in relation to the Hope Valley Wattleup Redevelopment Area.

Landcorp. A draft is in place with a return to pasture.

Table 6 Stakeholder Consultation



6.0 POST MINING LANDUSE AND CLOSURE OBJECTIVES

6.1 Post Mining Landuse and Closure Planning The closure planning will be updated from time to time. The site is totally cleared and partially excavated across the whole site. There are a number of management actions that can be taken in quarries to maximise rehabilitation effort and these will be used wherever possible. The general management actions are summarised below and will be used where applicable and as the opportunity presents. The site specific issues that relate to this site are also listed to explain how this site compares to the general rehabilitation guidelines. This excavation of limestone and sand is to prepare the site for its final end use as industrial land in compliance with the Hope Valley Wattleup Redevelopment Act and approved Master Plan prepared by Latitude 32. Almost all of M70/1275 lies within Latitude 32 Precinct 5. Currently the Draft proposal for the site is required to be level, at an elevation of 14 – 20 metres AHD, for use as part of the Intermodal Transport Facility to be located between the rail line and Moylan Road. The reserve is vested in the City of Cockburn for its particular requirements. Therefore the City of Cockburn will be contacted prior to completion of the excavation to determine their wishes in respect to final levels and takeover of the site. Perth to Peel Green Growth Plan When the Perth to Peel Green Growth Plan is signed off it will carry pre - approval from the Commonwealth under the EPBC Act 1999. The plan will also provide guidance and approval for the extraction of limestone and sand, industrial land and conservation. The site is cleared and partially excavated across the whole site. Therefore the Green Growth Plan is really coming too late to impact on this operation. Review of the Mine Closure Plan The Mine Closure Plan will be reviewed every three years.

6.2 Disturbance

M70/1275 is cleared and fully disturbed. No further clearing is required.

6.3 Closure Objectives Rehabilitation will utilise best practice and be directed towards achieving a sustainable land surface that is resistant to erosion and complies with Landcorp requirements for low construction costs of Latitude 32 Industrial complex. The excavation is to assist in the preparation of this portion of the site.



1. All operational plant, foreign materials, buildings and other matter associated with mining will be removed from site. (Roadbase may be buried by 2 metres of overburden such as in the base of the pit).

2. The disturbed land will be made safe and in compliance with the Mines Safety and

Inspection Act 1994 and DMP Mine Closure Guidelines.

3. The reformed land surface will be internally draining to localised low seepage areas.

4. All legally binding conditions and commitments relevant to mine closure and rehabilitation will be met.

5. The final land surface will be is resistant to wind and water erosion.

6. The final land surface will be geotechnically stable and suitable as an industrial end use.

Any filled areas are to be tested for stability.

7. Rehabilitation vegetation will be a sustainable cover of pasture species or hard stand in line with Latitude 32 requirements at the time.

8. Revegetation will be free from Declared or Environmental weeds that could compromise

the success of the revegetation or spread into any adjoining native vegetation.



7.0 IDENTIFICATION AND MANAGEMENT OF CLOSURE ISSUES

At the end of excavation and progressively as the active areas are closed, the only materials left will be natural limestone and sand that is substandard in terms of colour, size or uneconomic to extract, in addition to all overburden and topsoil. All other non natural materials will be removed. There has been extensive consultation between Landcorp and the City of Cockburn through the years in relation to Latitude 32. The reserve is vested in the City of Cockburn for its particular requirements. Therefore the City of Cockburn will be contacted prior to completion of the excavation to determine their wishes in respect to final levels and takeover of the site. The Master Plan and Industrial Precincts are the key documents. M70/1275 lies within Latitude 32 Precinct 5. Currently the Draft Land Use Planning and final landform is to comply with the Master Plan which has set elevations across the site of 16 – 20. metres AHD. These are subject to change as the Master Plan is revised with structure planning commencing in 2016. The land surface will be prepared to that plan and stabilised with pasture or hard stand as recommended and required by Latitude 32 at the time. That will stabilise the surface and minimise the costs of future earthworks. The Mine Closure Plan must be flexible in order to be able to incorporate future changes to the Master Plan that seem likely to occur. For example the Master Plan identified that Torgoyle Road Reserve along the southern boundary will be required to be lowered. Apart from compliance with the Master Plan, there are no significant closure issues that require management. There are no proposed tailings, ponds, adverse soil or other materials or features. There are no proposed dumps of subgrade rock, and overburden and topsoil will be used for rehabilitation. The main closure issues relate to the pit and the treatment of the quarry faces and floor of the pit. Rehabilitation will contain Dieback and Weed Management in addition to monitoring and replanting failed areas.

7.1 Research There has been extensive research across the Hope Valley – Wattleup Redevelopment Area and this research is co-ordinated by Landcorp through Latitude 32. Landcorp undertakes the research in order to provide data and planning for “industrial” land use and intermodal transport facility. Hanson Construction Materials will comply with the requirements of Latitude 32 planning and the Master Plan.



7.2 Baseline Data Collection and Analysis

As noted above Latitude 32 has undertaken extensive research and will continue to determine any shortfalls in the knowledge required for the Latitude 32 industrial end use and undertake or co-ordinate that research.

7.3 Gap Analysis

A large amount of information is available and the only gaps now relate to the activities of Latitude 32 with respect to the form of the final land surface and land uses and not excavation. Any further material collected during the life of the operations will be stored in the records for the operation and included in any Mine Closure Plan updates. As noted above Landcorp has undertaken extensive research and will continue to determine any shortfalls in the knowledge required for the Latitude 32 industrial end use and undertake or co-ordinate that research.

Ongoing monitoring of the end land uses for the site will be undertaken to ensure that rehabilitation and land restoration meets with the most recent plans for end use and Master Plan. The Green Growth Plan currently identifies the end land use as Industrial.

8.0 DEVELOPMENT OF COMPLETION CRITERIA

Currently (2013 – 2017) the State and Commonwealth Governments are developing a Strategic Assessment with respect to providing for sufficient basic raw materials including limestone. As part of that assessment all mining tenements and resources are being considered and assessed against conservation values and the need for resources with conversion of the site to industrial use. M70/1275 lies within Latitude 32 Precinct 5. A number of objectives relating to rehabilitation and closure are identified above in Section 6.3 Closure Objectives. These objectives form the basis and direction for the development of the completion criteria shown in Table 8.2. The approved pit is cleared in preparation for excavation.

8.1 Closure Consideration The final contours are proposed to continue to be in accordance with the Master Plan for industrial land use in the Hope Valley Redevelopment Area (Latitude 32). The final structure plan, with levels, is being prepared by Landcorp and is not yet available. Currently the Draft Land Use Planning and final landform is to comply with the Master Plan which has set elevations across the site of 16 – 20. metres AHD. These are subject to change as the Master Plan is revised. The end land surface will be in accordance with the safety considerations of the Mines Safety and Inspection Act 1995 and the requirements and guidelines of the Department of Mines and Petroleum; for example Guidelines on Safety Bund Walls Around Abandoned Open Pits 1991.



The final floor will be flat or gently sloping at a minimum grade of 4% to comply with the Latitude 32 Master Plan. The exact form of the final surface has not yet been determined by Latitude 32/Landcorp. Currently Latitude 32 require a stable final land surface to the draft plan as above, but the elevations may change as the design of the industrial area is being finalised. Limestone naturally crusts and stabilises within days of being subject to rainfall, provided there is no traffic disturbance. The floor and batter slopes will be limestone for much of their surface with a relatively thin layer of sand above the limestone at the top of the batter slopes. These batter slopes and buffers which do not currently lie within the approved footprint are likely to be lowered in the future in response to an amendment to the Mining Proposal after the Master Planning for Development Area 5 is known. Latitude 32 is yet to determine whether the site is to be left as hard stand, with overburden retained in stockpiles ready for future use on Latitude 32, or the overburden followed by topsoil spread out and stabilised by pasture. Therefore unless Latitude 32 advises otherwise, the final surface will be covered by overburden and then topsoil and planted to pasture. Landcorp/Latitude 32 made some comments in relation to the final levels;

Additionally, a condition of consent requiring this plan to be updated as required during the operation of the activity to remain consistent with the final levels plan for Latitude 32 and the contents of any local structure plan prepared for the planning area.

And

The final hardstand levels outlined within the Ongoing Rehabilitation and Mine Closure Plan shall be updated upon completion and adoption of the Latitude 32 Final Levels Plan.

• The closure will relate to all ground open at the end of operations.

• Maintenance and monitoring will be conducted until completion criteria is met.

• Unexpected or early closure will be completed in the same way as permanent closure

below but the full rehabilitation will be completed as one operation.

• All Completion Criteria will be monitored and adjusted as necessary during the life of the project based on stakeholder input, data collected on the existing environment, the results of research, and any implications that arise from excavation.

• The Completion Criteria are identified below as auditable tasks developed from the

assessment of species and success.

• The existing operations are consistent with the Mining Proposal.

• The closure plan will be modified from time to time in compliance with the HVWRDA Master Plan for Latitude 32 as required by Landcorp.



8.2 Closure objectives and broad risk consideration

Closure Objective

Un- managed Risk

Indicative Completion Criteria

Completion Criteria Measurement Tool and Assessment activities

Managed Risk

All legally binding conditions and commitments relevant to mine closure and rehabilitation will be met.

High Potential High impact

Comply with all legally binding conditions.

• All legally binding criteria, and conditions of approval from any agency will be complied with.

• The land surface is to have a landform in compliance with Latitude 32 Master Plan.

• Review the latest documentation and assess compliance.

• Visually audit against all conditions by establishing an Environmental Management System to AS standards.

Low

Comply with the conditions of the Mining Tenement.

High Potential High impact

Comply with the requirements of the Mining Tenement.

• Closure and rehabilitation is to be consistent with all conditions of the tenement.


• Compile an audit table of all conditions and commitments that relate to closure and conduct an audit of those items upon the completion of each stage of rehabilitation and annually until sign off.

Low

All plant, foreign materials, buildings and other matter associated with mining will be removed from the completed areas.

High Potential moderate impact

The site will be cleaned, structures and non natural materials will be removed.

• No non natural structures will be retained on site.

• All hardstand and road making materials and non natural inert materials are to be removed or buried.

• All non inert materials are to be removed from site.

• All ground once occupied by structures will be deep ripped and reconstructed.

• Audit of completed ground, to verify compliance.

Low

The disturbed land will be made safe and in compliance with the Mines Safety and Inspection Act 1994 and DMP Mine Closure Guidelines.

Moderate Potential High impact

Surfaces will be formed to DMP Guidelines and match natural ground. Holes, sumps drains, ditches

• Faces and the landform are to comply with DMP Guidelines and be stable for the long term.

• The land surface is to have a landform in compliance with Latitude 32 Master


• Visual observations of the landforms.

Low



and the like will be filled and removed.

Plan.

The reformed land surface will be internally draining and draining to small infiltration basins and pools.

Moderate Potential Moderate impact

Drainage will be internal or the ground sufficiently permeable to minimise or negate runoff.

• Slopes are to drain to areas of internal drainage and infiltration basins formed from sand and limestone.



Low

The land surface will be resistant to wind and water erosion.

Moderate Potential moderate impact

Slopes are to be stable and free from erosion.

• Slopes are to be stable and free from erosion.

• Slopes on the floor are to be < 4% and any batters retained at 1 : 2 to 1 : 4 vertical to horizontal.

• Rehabilitation is to be stabilised to pasture pending future industrial land use in compliance with Landcorp and Latitude 32 unless changed by Landcorp.


• Conduct audits of the completion criteria upon the completion of each stage of rehabilitation and annually until sign off.

• Maintain ongoing records.

Low

The rehabilitated vegetation will have resilience to fire.

High Potential high impact

The rehabilitated vegetation will be resilient to fire impacts, seasonal changes and longer term variable weather impacts.

• The vegetation is to include a mixture of pasture species that grow in local, limestone substrates and be resilient to fire or readily regenerate following fire.

• Annually inspect revegetation to determine its long term survival from environmental and fire impacts.

• Until sign off inspect vegetation re-establishment following fire.

Low

Revegetation will be free from Declared or Environmental weeds that could compromise the success of the revegetation or spread into adjoining native vegetation.

High Potential high impact

Revegetation will be free from Declared or Environmental weeds that could compromise the success of the revegetation or spread into adjoining native vegetation.

• Absence of Declared or Environmental weeds that could compromise the success of revegetation.

• Exotic species to be no greater richness or density than adjoining vegetation.

• Provide annual inspections at the appropriate time of the year.

Low

Table 7 Closure Objectives



8.3 Progressive Permanent Closure of Completed Stages of the Pit

Completion Criteria Activity

To be completed as soon as site activities have been completed on any area and that area will not be required for future operations.


Prior to undertaking permanent closure. • Review the latest documentation and assess compliance requirements. • Design the rehabilitation to comply with and be able to achieve the completion

criteria and commitments. • Review the latest documentation and assess compliance. • Visually audit against all conditions.

• Closure and rehabilitation is consistent with all conditions of the tenement.

Prior to undertaking permanent closure. • Review the latest tenement conditions and design the rehabilitation to comply

with all conditions relating to closure. • Review the latest documentation and assess compliance. • Compile an audit table of all conditions and commitments that relate to

closure and conduct an audit of those items upon the completion of each stage of rehabilitation and annually until sign off.




• All ground once occupied by structures are deep ripped and soils reconstructed.

Prior to earthworks, soil restoration and rehabilitation; • Consult the Latitude 32 Master Plan and Latitude 32 and its managers

Landcorp to determine whether any additional or alternative requirements are necessary. Comply with any requirements.

• Comply with Latitude 32 and Landcorp requirements for the interim final surface.

• Remove any plant or non natural materials and structures. • Remove all hydrocarbons and other fluids. • Remove any soil or limestone contaminated by fluids or non natural materials

to an approved disposal area. • Remove waste systems and septics. • Audit of completed ground, to verify compliance. • Remove all non inert products. • Some concrete and other inert products may be removed or buried at depth

and covered by overburden.

• Faces and the landform are to comply with DMP Guidelines and be stable for the long term.


Prior to rehabilitation; • Comply with Latitude 32 and Landcorp requirements for the interim surface. • Complete activities to make the site safe. • Push down faces and reduces slope angles. • Ensure that the batters are formed to comply with the requirements. • Ensure the floor is completed and formed to the proposed final contours. • Match the landform to the adjoining excavated and non excavated surfaces. • Deep rip the floors and batter slopes along contour. • Spread the overburden. • Spread any local native vegetation removed from ahead of excavation. • Provide fences, bunding and warning signs above faces as required. • Provide locked gates or access restraints as required. • Audit of completed ground, to verify compliance. • Visual observations of the landforms.

• Slopes are to drain to areas of internal drainage and infiltration basins

Prior to rehabilitation and during audits;

• Comply with Latitude 32 and Landcorp requirements for the interim surface. • Inspect batter slopes, pools and other features and inspect drainage and



formed from sand and limestone.

provide infiltration areas as necessary. • Form small internal sumps and detention basins to ensure all water is

retained on site. • Audit of completed ground, to verify compliance. • Visual observations of the landforms.



• Rehabilitation is to be stabilised to pasture pending future industrial land use in compliance with Landcorp and Latitude 32.

Prior to rehabilitation and during audits; • Comply with Latitude 32 and Landcorp requirements for the interim surface. • Inspect all areas and ensure the land surfaces are stable to erosion from wind

and water. • Check the slope angles for compliance. • Install contour features to retain water. • Visual observations of the landforms. • Check any required fencing and take remedial action if damaged.

• The vegetation is to include a mixture of pasture species that grow in local, limestone substrates and be resilient to fire or readily regenerate following fire.

Prior to vacating and during annual inspections. • Comply with Latitude 32 and Landcorp requirements for the interim surface. • Conduct audits of the key indicators upon the completion of each stage of

rehabilitation and annually until sign off, using lists and photographic records. • Maintain ongoing records. • Improve existing rehabilitated areas as necessary using additional seeding,

weed control. • Maintain ongoing records.


• Exotic species to be no greater richness or density than adjoining vegetation.

Annually and until taken over by Landcorp/Latitude 32. • Comply with Latitude 32 and Landcorp requirements for the interim surface. • Remove or spray environmental or declared weeds. • Provide annual inspections at the appropriate time of the year. • Provide annual follow up inspections and treatment at the appropriate time of

the year. • Carry out all operations and restoration activities using dieback management

principles.

Table 8 Permanent Closure Procedures



8.4 Temporary Seasonal Closure and Campaign Closure

Tasks to be completed Seasonal or Campaign Closure Less than 12 months Prior to closure for each campaign

Care and Maintenance Greater than 12 months

Activity • All legally binding

criteria, and conditions of approval from any agency will be complied with.

Prior to undertaking temporary closure. • Review the latest documentation. • Assess compliance with the

conditions and commitments.

Prior to undertaking temporary closure. • Review the latest documentation. • Assess compliance with the

conditions and commitments.


Prior to undertaking temporary closure. • Review the latest Master Plan

documentation and assess compliance in conjunction with the tenement conditions.

Prior to undertaking temporary closure. • Review the latest Master Plan

documentation and assess compliance in conjunction with the tenement conditions.

• Secure the site

against spills, leakages and the risks of other adverse impacts.

Prior to vacating; • Secure the site and any plant or

structures to be left. • Remove all hydrocarbons and

other fluids and other potential pollutants.

• Remove contaminated soils and non inert materials.

• Ensure wastes are removed or recycled.

Prior to vacating; • Secure the site and any plant or

structures to be left. • Remove all hydrocarbons and other

fluids. • Remove contaminated soils and non

inert materials. • Ensure wastes are removed or

recycled.

• Secure the safety of the site.

Prior to vacating; • Complete activities to make the

site safe. • Provide fences, bunding and

warning signs above faces as required.

• Provide locked gates or log access restraints as required.

Prior to vacating; • Complete activities to make the site

safe. • Provide fences, bunding and

warning signs above faces as required .

• Provide locked gates or access restraints as required.

• Remove any plant susceptible to combustion, stealing or movement.

• Ensure the site is geotechnically stable

• Faces and the landform are to comply with DMP Guidelines and be stable for the short and long term.

• Inspect all areas and ensure the land surfaces are stable to erosion from wind and water.

• Faces and the landform are to comply with DMP Guidelines and be stable for the short and long term.

• Inspect all areas and ensure the land surfaces are stable to erosion from wind and water.

• Ensure surface

water is retained onsite or suitably managed.

Prior to vacating; • Slopes are to drain to areas of

internal drainage and infiltration basins formed from sand and limestone.

• Inspect batter slopes, pools and other features and inspect drainage and provide infiltration areas as necessary.

Prior to vacating; • Slopes are to drain to areas of

internal drainage and infiltration basins formed from sand and limestone.

• Inspect batter slopes, pools and other features and inspect drainage and provide infiltration areas as necessary.



• Rehabilitation Prior to vacating; Rehabilitate any areas that are no longer required to pasture or to Landcorp specification, once the Master Plan is finalised. Prior to vacating and during audits; • Inspect any revegetation to

determine its long term survival from environmental and fire impacts.

• Undertake to mitigate any rehabilitation areas that are deficient or not capable of becoming compliant with the completion criteria.

Prior to vacating; • Ensure any rehabilitation is

conducted at a suitable time to achieve success.

• If timing is not suitable undertake remediation earthworks such as re-ripping.

Check annually. If rehabilitated areas are deficient; • Provide additional topsoil or seed to

increase the number and diversity of plants.

• Undertake to mitigate rehabilitation areas that are deficient or not capable of becoming compliant with the completion criteria.

• Be aware of and assist with actions that help facilitate habitat creation.


Prior to vacating and during audits; • Inspect the site for environmental

and declared weeds. • If found, inspect adjoining native

vegetation for edge effects. • Inspect rehabilitation and the

edges of access roads.

Annually; • Remove or spray environmental or

declared weeds. • Provide annual follow up inspections

and treatment at the appropriate time of the year.

Table 9 Temporary Closure Procedures



9.0 CLOSURE MONITORING AND MAINTENANCE Monitoring of the rehabilitation is to be undertaken at least prior to the wet season and following the wet season. A weed monitoring and management program will be conducted annually during operations and following closure to identify and control significant environmental weeds. The revegetation will be monitored for 3 – 10 years post closure of each part of the pit, until completion criteria are achieved or the land is converted to industrial land.

9.1 Monitoring Procedures and Remediation

Completion Criteria Measurement Tool and Assessment activities

Timing Remediation Techniques to be Used if Required.



• Visually audit against all conditions by establishing an Environmental Management System to AS standards.

Prior to land restoration activities and on completion of rehabilitation.

• Undertake liaison and adjust the land reconstruction and rehabilitation to bring into compliance.

• Repeat or undertake required activities.



• Compile an audit table of all conditions and commitments that relate to closure and conduct an audit of those items upon the completion of each stage of rehabilitation and annually until sign off.

Prior to land restoration activities and on completion of rehabilitation.

• Undertake liaison and adjust the land reconstruction and rehabilitation to bring into compliance.

• Repeat or undertake required activities.




• All ground once occupied by structures are deep ripped and soils reconstructed.


• Compliance with Latitude 32 and Landcorp requirements for the interim surface.

Prior to spreading with overburden.

• Remove any foreign or other non natural materials.

• Deep rip any areas that have not been adequately prepared.

• Check that all hardstand and roads that are no longer required are closed and prepared for rehabilitation.

• Faces and the landform are to comply with DMP


Prior to spreading with overburden.

• Complete remediation earthworks.

• Undertake any earthworks



Guidelines and be stable for the long term.


•


required to bring the land surfaces into compliance with the end use and completion criteria.

• Smooth out any non natural looking slopes and features.

• Make any non compliant faces safe and in compliance to DMP Guidelines.

• Slopes are to drain to areas of internal drainage and infiltration basins formed from sand and limestone.




Prior to spreading overburden.

• Complete or revise the remediation earthworks.

• Ensure the ground is free draining and the sumps can contain the predicted rainfall events



• Rehabilitation is to be stabilised to pasture pending future industrial land use in compliance with Landcorp and Latitude 32.



Annually • Undertake additional planting or seeding.

• Provide additional earthworks or brushing.

• Provide temporary wind breaks.

• Bring any non compliant faces into compliance by backfill, or pushing down.


• Annually conduct an on site audit of completed rehabilitation for species richness, resilience.

• Inspect revegetation to determine its long term survival from environmental and fire impacts.

• Until sign off inspect vegetation re-establishment following fire.

Annually Continue monitoring for 3 – 10 years until signed off or developed to industrial land. Inspect vegetation re-establishment following fire.

• Undertake additional weed control measures using spray or mechanical means.

• Treat grass impacts with Fusilade and general weeds with glyphosate or similar.

• Treat when appropriate.

Table 10 Monitoring Procedures



10.0 FINANCIAL PROVISION FOR CLOSURE Financial provisioning at this time can only be indicative. Costs will change over the life of the operations, and costs outlined now will have to take account of inflation and other potential changes. In addition, the active term of operations will also affect the costs. The greater the length of time the greater the cost of rehabilitation. Rehabilitation will be completed as soon as practicable following closure of each section of the pit. Costings for rehabilitation work for a quarry excavation, if it had to be completed in one operation. The costings will be assessed and adjusted over time as the Mine Closure Plan is regularly revisited. FINAL CLOSURE COST ESTIMATES Actions to be Completed for Final Closure Estimated Cost Removal of all structures, buildings and fences. Bulldozer to reform faces, push down to form batter slopes, deep rip the floor. Hardstand and the access roads will be deep ripped with tyne attached to a loader, grader or bulldozer but only at the completion of all excavation Sourced from leaseholder mobile plant.

$ 50 000

Spreading overburden followed by topsoil by bulldozer and loader. Not required as it will compromise industrial land use.

Environmental consultant to provide input to the species and methods to be used for rehabilitation.

$ 5 000

Purchasing and spreading pasture seed $ 10 000 Monitoring of the rehabilitation, and ongoing assessment. Weed control, using mechanical removal, hand pulling and glyphosphate/Fusilade control.

$ 10 000

Replanting or reseeding areas that do not meet the completion criteria, trials. The monitoring of the success becomes the research protocol and will define the methods, species, planting regimes and preparation to be used.

$ 10 000

Administration, travel and other contingencies $ 5 000 Annual inspections and tasks by local contractor $ 5 000 TOTAL $ 50 000



TEMPORARY CLOSURE COSTS Actions to be Completed for Temporary Closure Estimated Cost Removal of structures and plant that will not be secure $ 5 000

Ensuring that faces and operations are geotechnically safe $ 10 000 Removal of wastes and any potentially adverse materials $ 1 000 Maintenance and upgrade of safety and security features such as fences, gates, trenches and bunding.

$ 4 000 plus $ 4 000 annually

Administration and review of site. $ 4 000 annually TOTAL $ 20 000 plus up to

$ 8 000 annually until taken over by Landcorp/Latitude 32.

Table 11 Closure Cost Estimates The cost of rehabilitation will be reviewed regularly, every time the Mine Closure Plan is revisited; that is every three years.



11.0 MANAGEMENT OF INFORMATION AND DATA

All data relating to the operations will be retained as hard copies and electronic copies by Hanson Construction Materials. The data will include all materials relating to the project and include updated aerial and ground photography. An annual environmental report will be prepared and submitted to the Department of Mines and Petroleum in accordance with the tenement conditions. The Mine Closure Plan will be reviewed every three years or as required by the Department of Mines and Petroleum.



12.0 CLOSURE IMPLEMENTATION PROCEDURES

12.1 Land Restoration and Rehabilitation

Land Clearing 1. The land is cleared. Land Restoration The following procedures are to be used to restore the disturbed ground to comply with the HVWRA (Latitude 32) Master Plan and any amendments.

• Formation and surface stabilistation of the land surface to the Master Plan is to occur as soon as possible following the end of excavation, and other activities or as soon as a part of the operation is completed or no longer required.

• Where possible any disturbed areas that are no longer required will be reformed and

stabilised to comply with the Master Plan using the methods described above within 12 months of becoming available. Currently no area is available and the Master Plan has not been finalised.

Pit faces

• The pit will be prepared by pushing down, reducing and backfilling the active face with a loader and bulldozer.

• Batter slopes will be retained in compliance with the Mines Safety and Inspection Act

1994 and DMP Mine Closure Guidelines. Any natural soil or weathered regolith slope or batter will be less than 1 : 2 to 1 : 4 vertical to horizontal in compliance with the Master Plan and any amendments and the requirements of Landcorp.

• The floor is internally draining, and will retain rainfall and not allow any runoff.

• Surface water will be retained in the lowest corner of the pit to act as a temporary water

source and seasonal habitat.

Pit floor, hardstand, roads and excavated areas

• All buildings, plant and any other foreign materials will be removed from site. • Roadbase, hardstand and any other inert materials left over from the site operations will

be scraped and picked up and removed from site.

• The ex-hard stand, processing, access roads, stockpile areas and excavated areas will be reformed to comply with the Master Plan and any amendments and to the requirements of Landorp.

• The whole floor will be left as hard stand as required by Landcorp or hardstand covered

by overburden and topsoil and stabilised by pasture.

• The draft floor is 16 metres AHD in the west, rising to 20 metres dependant on the Mater Plan Final Contours for Development Area 5.



• Overburden and topsoil that is not required to be used by Landcorp as part of the

interim stabilisation, will be stored in separate dumps stabilised by pasture or soil amendments.

Unplanned or temporary closure is addressed under 8.4 Temporary Closure. Revegetation

Floor of the Pit • The preferred method of revegetation is to use the pasture seed from existing topsoil.

However this may be deficient and additional seed is likely to be required. • If sufficient pasture seed is not available from the topsoil or does not germinate then

additional seed will be added. • For pasture in this situation it is essential that the species are matched to the soil types

and rainfall. The location falls into the “High Rainfall Coastal” planting regime with sandy to limestone soils. Suitable perennial legumes include Birdsfoot trefoil, Lucerne, Strawberry Clover, and Sulla. Perennial pasture includes Perennial Ryegrass, Phalaris, Cocksfoot, and Summer Active Tall Fescue, Kikuyu and Rhodes Grass. Annual pasture species include Italian Ryegrass, Serradella, subterranean clover.

• The actual species used will be determined by the individual season, nature of the

rainfall in the preceding months and stocking/hay production proposed by the landholder which may change from time to time.

• Seeding rates are 2 – 5 kg/ha depending on the species used; for example Ryegrass is

seeded at 3 kg/ha whereas Rhodes Grass is seeded at 4 kg/ha. • Studies have shown that topsoil placement, if required by Landcorp/Latitude 32, is best

undertaken in summer for maximum germination, but this raises the potential for additional dust generation from the fine humus particles.

• Any weeds likely to significantly impact on the rehabilitation are to be sprayed with

Roundup or similar herbicide or grubbed out, depending on the species involved. • If sufficient vegetation does not germinate, the area will be seeded in early Autumn

with a mixture of pasture species. The species will be selected on advice from a consultant or the Department of Agriculture and Food.

Erosion Control • Soil erosion occurs when the limestone and sand base are disturbed by traffic or

other movements. Limestone readily crusts when exposed to rainfall. • Erosion involves soil particles being detached from areas not adequately protected by

vegetation, limestone not stabilised by crusting or disturbed by vehicle or other movements. The stability of previously excavated slopes and floors on the adjoining land demonstrates that the excavated areas readily form stable land surfaces with minimal treatment.

• The surface of the excavated areas will be flat with minimal erosive runoff.



• Water erosion on the batter slopes can be reduced by leaving the surface soft, rough and undulating, with the undulations running along contour. The final machinery run should be along contour and not down slope. In most cases any backfill will be pushed perpendicular to the face rather than pushed along contour.

• Wind erosion will be controlled by rehabilitating the disturbed ground as soon as

practicable.

• For rehabilitation areas, revegetation will take place as soon as possible following landform and soil reconstruction.

Fertiliser 1. Fertiliser is not normally required and will add nutrients to the ground water Weeds 1. The Weed Management Plan (attached) will form the basis of weed treatment. Depending

on the nature of the planting substrate, a broad spectrum spraying program may be used. In areas where grass only is a potential problem, grass specific sprays will be used. In some areas where topsoil from cleared native vegetation is available no spraying may be required.

Monitoring 1. During late summer an assessment of the success of the rehabilitation will be made to

determine the rehabilitation requirements for the following winter. 2. Monitoring includes visual assessments and, where necessary, counts to determine the

success of the rehabilitation as follows;

• plant density • plant form and vegetation structure • plant growth • plant deaths • regeneration • weed infestation

3. As necessary steps will be taken to correct any deficiencies in the vegetation. 4. Rehabilitation of each stage will be monitored for a period of three plus years to ensure that

the revegetation meets the completion criteria of providing self sustaining indigenous shrub vegetation or until taken over by Landcorp/Latitude 32.

5. Ongoing weed management to identify and treat significant environmental weeds or weeds

likely to impact on the rehabilitation will be conducted until taken over by Landcorp/Latitude 32.

6. In areas of rehabilitation that do not meet the completion criteria measures are to be taken

to increase the stem density to achieve the completion criteria. This could include but not be limited to;

• additional seeding, • planting additional tube plants, • additional use of fresh topsoil.



12.2 Dieback Management

Dieback Management Dieback of vegetation is often attributed to Phytophthora cinamomi even though there are other Phytophthora species and other diseases such as Armillaria that can cause dieback like symptoms. Microscopic soil-borne fungi of the genus Phytophthora kill a wide range of native plants and can cause severe damage to many vegetation types, particularly those from the families Proteaceae, Epacridaceae, Xanthorrhoeaceae and Myrtaceae. In most cases dieback is caused by a pathogen which infests the plant and causes it to lose vigour, with leaves dying, and overtime may kill the plant. As such the management of Dieback is essentially related to plant hygiene when coming onto a site and within a site. There are several guides to the management of Dieback. • Department of Parks and Wildlife (CALM) Dieback Hygiene Manual 1992 is a practical

guide to Dieback management. • Department of Parks and Wildlife (CALM) Best Practice Guidelines for the Management of

Phytophthora cinamomi, draft 2004. • Dieback Working Group 2005, Management of Phytophthora Dieback in Extractive

Industries. • Dieback Working Group, 2000, Managing Phytophthora Dieback, Guidelines for Local

Government. The Department of Parks and Wildlife generally recognises that Dieback is less likely to impact on vegetation on limestone and Spearwood/Cottesloe Land Systems, Podger F D and K R Vear, 1998, Management of Phytophthora and disease caused by it, IN Phytophthora cinnamomi and the disease caused by it - protocol for identifying protectable areas and their priority for management, EPA 2000. However recently Murdoch University has identified a species of Phytophthora as having impacts on Tuart in calcareous soils.

The Draft Tuart Conservation and Management Strategy also recognises that Tuart is resistant to Phytophthora cinamomi and Armillaria luteobubalina. The recent impacts on local Tuarts are also not thought to be due to Medulla Yellows by the Strategy. It is unclear whether dieback or other pathogens already occur on site. With the level of disturbance, previous activities and the degree of disturbance to vegetation it is likely that pathogens already exist on site. It must also be remembered that the end use of the site will be industrial land that is part of Latitude 32. Therefore dieback management will relate to adjoining native vegetation, rehabilitation of green belts along Russell Road and best practise. However as part of normal best practice, plant disease management actions will be used, therefore the following general principles are applied to Dieback management. The aim of dieback management during excavation is to minimise the risk of entry of any additional plant pathogens to the site. The calcareous soils of the remnant vegetation may reduce the spread of some Phytophthora species, but there may be other pathogens such as Armillaria. In many ways the management of the site for dieback is similar to that for the management of weeds, and the two management practices are considered together. Even so, the final end use will be industrial land. There is very little risk of the operations spreading dieback onto vegetation on adjoining properties as there is no access to those properties and they are cleared.



On the other hand good management practices are used as part of the ongoing normal quarry operations. Not all potential impacts apply to all parts of the proposed quarry operations. • DPAW and Dieback Working Group 2005, Guidelines will be followed. • The access road will be limestone. • Dieback diseases are more likely to be transported under moist soil conditions. • All vehicles and equipment used during land reinstatement, will be clean and free from soil

or plant material when arriving at site. • No soil and vegetation is to be brought to the site apart from that to be used in rehabilitation

and that which is dieback free. • Unwanted access to vegetated areas is discouraged through reduced tracks, signage, site

marking and or fencing as appropriate. • Rehabilitated surfaces will be free draining and not contain wet or waterlogged conditions. • Illegally dumped rubbish is to be removed promptly. • Roads are to be maintained as free draining and hard surfaced. • A split operation will be worked where practicable, where the road transport vehicles only

access one side of the stockpile or processing area and excavation vehicles operate on the other side of the stockpiles and processing, reducing the risk of contamination from road transport.

• DPAW has determined that material such as sand and limestone, taken from deeper in the

regolith profile where there is no organic and other plant matter, carries low risk of spreading dieback. (DEC 2004).

• The Weed Management Policy will be complied with.



12.3 Weed Management Weed management is to be used to minimise impact on site remnant vegetation and on adjoining properties. Good management practices are to be used as part of the ongoing normal quarry operations. The management of weeds is essentially similar to that for plant diseases. The impact of weeds is really the impact within the local area and the more they are controlled the better. It is desirable that the site does not become a haven for environmental weeds and therefore a management and control program is warranted at all sites. Weeds can be declared under the Agriculture and Related Resources Protection Act 1976 which requires that Declared Weeds are eradicated. Other weeds are not Declared but may be classified as Environmental Weeds because they are well known for impacting on vegetation. Generally if the actions taken for Dieback are applied they will also control weeds. Not all potential impacts will apply to this quarry and the main impacts affecting this site are also listed. Weed management will be used to minimise impact on site and on adjoining properties. Good management practices will be used as part of the ongoing normal quarry operations. This plan utilises the most appropriate on ground measures to minimise the risk of spread of Declared and Environmental weeds. The information provided here summarises the key points of the on ground management. There is a significant amount of exotic vegetation on site including pasture and other species that can be classified as weeds to bushland. During the vegetation studies a total of 34 species of exotic plants were recorded. Weeds are most likely to impact on;

• Disturbed areas such as overburden dumps, topsoil stockpiles.

• Edges of access roads.

• Edges of firebreaks adjacent to surrounding vegetation.

• Locations accessible to the public on which rubbish is dumped. The main sources of weeds are;

• Naturally occurring in topsoil. There is a very high exotic plant seed load with most of the vegetation being pasture and exotic species. 34 species were recorded and there are undoubtedly more on site.

• Weeds from edge effects from access and local roads. • Gradual creep of weeds along access roads.

• Rubbish dumped by the public.

• Materials or waste brought to site by employees.

• Soil and seeds from vehicles arriving at site. This often applies to trucks that have

carried something else such as grain, or vehicles to be used in earthworks.

• Wind blown seed from surrounding land.



• Birds and other vectors. This is more common than is often given credit for. eg

Solanum species. Weed Management will consist of, but not be limited to, the following actions. As the site will be industrial land grass stabilisation is preferred by Latitude 32. Therefore the main action on weeds will concentrate on species known to cause significant impacts and listed weeds. • The Dieback Management Actions will be used to assist weed management. • Inspections are to be conducted to monitor the presence and introduction of Environmental

and Declared Weeds on an annual or more frequent basis. On identification, Declared and significant environmental weeds will either be removed, buried, or sprayed with a herbicide.

• Large plants such as Castor Oil plants and Declared Weeds are to be periodically grubbed

out or spot sprayed with a herbicide. • Rehabilitation of the final land surface will be to interim pasture revegetation for soil

stabilisation as the site will be formed into industrial land. This will not involve the elimination of exotic species, but rather provide an interim cover that stabilises the soil. Weeds that impact on that interim cover will be treated.

• Areas of grass can be sprayed with Fusilade or similar grass selective herbicide if required.

This can occur over the top of rehabilitated areas without significantly setting back the broad leafed species.

• All vehicles and equipment to be used during land clearing or land reinstatement, are to be

clean and free from soil or plant material when arriving at site. • No soil and vegetation will be brought to the site apart from that to be used in rehabilitation. • Plants to be used in rehabilitation are to be free from weeds. • Unwanted access to vegetated areas is to be discouraged through signage, marking, a lack

of tracks, perimeter bunding and/or external fencing. • Weed affected top soils may need to be taken offsite, used in weed affected areas, buried

by 500 mm soil/overburden or taken offsite. • Illegally dumped rubbish is the major source of weeds and will be removed promptly. • No weed contaminated or suspect soil or plant material is to be brought onto the site. • Weeds are to be sprayed with broad spectrum spray prior to planting or seeding in weed

affected soils as required. • Weed management will work from the least affected areas to most affected. • Ongoing monitoring of weeds should be undertaken at least annually in autumn, prior to

winter rains.

12.4 Surface and Ground Water Protection The sand and limestone is very porous and direct infiltration of rainfall is normal without any detention basins or other collection systems. There is no surface water runoff.



All surface water runoff from the disturbance and rehabilitation footprint is contained on site. As the disturbance footprint is located on elevated ground, and there is no surface water flow, no flows will come into the disturbance footprint, and none will need to be diverted around the disturbance. The rehabilitated surface will be around metres above the highest known water table thereby further minimising any risks to groundwater quality.



REFERENCES Acid Sulfate Soil Management Advisory Committee NSW, 1998, in their Acid Sulfate Manual. Abeysinghe P B, 1998, Limestone and Limesand Resources of Western Australia, Geological Survey of Western Australia, Mineral Resources Bulletin 18. Abeysinghe P B, 2003, Silica resources of Western Australia, Geological Survey of Western Australia, Mineral resources Bulletin No 21. Australian Geomechanics Society, 2003, Engineering Geology of Perth, Parts 1 and 2, Volume 38 No 3 and No 4. Basic Raw Materials Resource Protection Working Plan, prepared for the Department of Planning and Urban Development (DPUD, 1996). Bastian L V, 1996, Residual soil mineralogy and dune subdivision, Swan Coastal Plain, Western Australia, Australian Journal of Earth Sciences 43, 31-44

Chamber of Commerce and Industry, 1995 and 1996, Managing the Basic Raw materials of Perth and the Outer Metropolitan Region, Parts 1 and 2. Chamber of Commerce and Industry, 2008, Basic Raw Materials Access and Availability. Department of Conservation and Environment, 1980, Atlas of Natural Resources Darling System, Western Australia. Department of Environment and Conservation 2004, Perth Groundwater Atlas. Department of Environmental Protection (1996). Land development sites and impacts on air quality: A guideline for the prevention of dust and smoke pollution from land development sites in Western Australia. Department of Environmental Protection (1997b). Environment Protection (Noise) Regulations 1997: Summary of the Regulations. Department of Environmental Protection, Perth. DEC, 2011, Guideline for Managing the Impacts of Dust and Associated Contaminants from Land Development Sites, Contaminated Sites Remediation and other Related Activities. Department of Minerals and Energy (1991). Environmental Management of Quarries: Development, Operation and Rehabilitation Guidelines. DOIR, Perth. Department of Water (1999b). Water Quality Protection Note: Above Ground Chemical Storage Tanks in Public Drinking Water Source Areas. Water and Rivers Commission, Perth. Department of Water (1999d). Draft Statewide Policy: Pesticide use in Public Drinking Water Source Areas. Water and Rivers Commission Perth. Department of Water (1999a). Water Resource Protection Series WRP16: Draft Policy and Guidelines on Construction and Silica Sand Mining in Public Drinking Water Source Areas. Water and Rivers Commission, Perth. Department of Water (1999c). Water Quality Protection Note: Recharge Criteria for Public Drinking Water Source Areas. Water and Rivers Commission, Perth. Department of Water, Water Quality Protection Note: Washdown of Mechanical Equipment, Perth.



Department of Water, 1998, Manual for Managing Urban Stormwater Quality in Western Australia. Environmental Protection (Kwinana) (Atmospheric Wastes) Regulations 1992 Area B. EPA, 2000, Phytophthora cinnamomi and the disease caused by it – a protocol for identifying protectable areas and their priority for Management. Firman J B, 2006, Ancient weathering zones, pedocretes and palaeosols on the Australian Precambrian shield and in adjoining sedimentary basins: a review, IN Journal of the Royal Society of Western Australia, Volume 89 part 2. Geological Survey of Western Australia, 1990, Geology and Mineral Resources of Western Australia, Memoir 3. Geoscience Australia, 2005, Natural hazard risk in Perth, Western Australia. Gozzard J R, 1987, Information on Industrial Minerals - Coastal Plain between Lancelin and Fremantle, Geological Survey of Western Australia record 1978/11. Gozzard J R, 1987, Limesand and Limestone Resources between Lancelin and Bunbury, Geol Surv WA, Record 1987/5 Grimes K G, 2006 Syngenetic karst in Australia: a review, Helictite 39 (2) 200 Guidelines for Groundwater Protection in Australia, ARMCANZ, ANZECC, September 1995. Latitude 32, 2014, Groundwater Monitoring May 2013 – November 2014. Playford, P E, A E Cockbain and G H Low, 1976, Geology of the Perth Basin Western Australia, Geological Survey of Western Australia Bulletin 124. Tiller K G, 1993, Micronutrients, IN Soils and Australian Viewpoint, CSIRO Water Authority 1989, South West Coastal Groundwater Area Groundwater Management Review, Report WG 84 Western Australian Planning Commission, 2010, Directions 2031. Western Australian Planning Commission, Planning Bulletin 64, Acid Sulfate Soils. Western Australian Planning Commission, State Planning Policy 2.4, Basic Raw Materials. Western Australian Planning Commission, State Planning Policy No 4.1, State Industrial Buffer Policy, (draft July 2004). Western Australian Water Quality Guidelines for Fresh and Marine Waters, EPA Bulletin 711, 1993. Willett, I R, 1993, Oxidation-reduction reactions IN Soils and Australian Viewpoint,

Metadata DatumHorizontal : GDA94Zone : MGA Zone 50Vertical : AHD71

Scale

1 : 2500 @ A3Project Code : 061501 - 20161130MXDDelivery : 30th November, 2016

M70/1275 - 2016 CALENDER YEAR AER SUMMARY (for EARS 2)MINING & INFRASTRUCTURE MRF16

Legend

Notes

Tenement Boundary : Dept of Mines & PetroleumOrthophoto Mosaic : Aerial Photography flownJanuary 2008.Compiled at Survey Graphics : 30th Nov, 2016.

M70/1275Total 27.85ha

D

D

DD

DD

D

DD

D

D

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RUSSELL

ROAD

0 50 100 150 200

metres'Sealed Road', 'Building Area' & 'Active Mining Area' have been positioned visually,based on an image supplied in the original email.

Legend

Sealed Road [0.10ha]

Building Area [0.13ha]

Active Mining Area [16.07ha]

Unapproved Mining Area [9.23ha]

Buffer/Bunding Area [2.32ha]

D

Area (ha)

Total Area [27.85ha]

MRF Desc. MRF Category

Transport Corridor C

C

N/A N/A

Mining void (with depth >5m)above groundwater level

Building (other than workshop)or camp site

C

N/A N/A

APPROVED EXCAVATION AREA

Figure 1

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387,800mE

387,900mE

387,900mE

388,000mE

388,000mE

2016 Site Plan - M70/1275

PLAN PRODUCED: 16/11/2016COORDINATE SYSTEM: GDA 1994 MGA Zone 50Imagery Source: WA Limestone (November 2016)

Russell Road QuarryRussell Road, Munster

Scale at A3: 1:2,500

0 20 40 60 80 10010

m

W.A. LIMESTONE

NO

RT

HLegend

Tenement Boundary

Access

Cleared

Mining Void <5m

Topsoil Stockpile

Disturbed by others (prior to grant of tenement)

Undisturbed

CURRENT SITE ACTIVITY

Figure 2

CURRENT SITE ACTIVITY

Figure 3

Screening bund to Torgoyle Road. View west.

View north along the eastern boundary of the excavation area

Figure 4

Excavation area cleared, with the topsoil left in place

Entrance to the excavation area with the eastern screening bund in place. View north rom the south eastern corner.

Figure 5

Figure 6

LATITUDE 32

Approved AreaM70/1275

Risk Management, Closure M70/1275Russell Road, Wattleup

Landform Research 1

Environmental Factor - Objective

Identified Issues and Commitments

Unmanaged Risk Proposed Management References Managed Risk

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FLORA and VEGETATION

To maintain representation, diversity, viability and ecological function at the species, population and community level.

Vegetation communities and/or biodiversity may be significantly impacted by clearing, and degradation by weeds and dieback.

E 1 Low • The site is cleared. E 1 Low

Threatened Communities may be impacted by inadvertent impacts.

E 1 Low • None recorded. • The site is cleared.

E 1 Low

Priority species may be affected by clearing, disturbance, weeds, dieback and other impacts.


E 1 Low

Threatened Species may be impacted by inadvertent impacts.


E 1 Low

Weeds may become established and impact on the local and on site biodiversity

C 3 High • A weed management program is proposed, in conjunction with City of Cockburn.

12.3 Weed Management Plan

C 1 Low

Dieback disease may be present and impact on the local and onsite vegetation.

C 4 High • Dieback management procedures are proposed in 12.2 in conjunction with City of Cockburn.

Dieback Management Plan D 2 Low

The developments may fragment communities, biodiversity and

E 1 Low • The linkages are determined by the Latitude 32 master Plan which shows Russell Road as a green belt.

• The northern buffer and batter slope will potentially

E 1 Low


Landform Research 2

ecological linkages.

be formed as a green belt depending on the outcome of the Development Precinct 5 planning which is currently underway.


Landform Research 3




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TERRESTRIAL FAUNA

To maintain representation, diversity, viability and ecological function at the species, population and assemblage level.

Communities and fauna and/or biodiversity may be significantly impacted by clearing, and degradation by weeds and dieback.

E 1 Low • The site is cleared. • There will be no fragmentation of communities.

E 1 Low

Threatened Faunal Communities may be impacted by inadvertent impacts.

E 1 Low • The site is cleared. E 1 Low

Priority Fauna species may be affected by clearing, disturbance, weeds

E 1 Low • The site is cleared.

E 1 Low

Threatened Fauna Species may be impacted by inadvertent impacts.

D 2 Low • The site is cleared.

D 2 Low

SUBTERRANEAN FAUNA

To maintain representation, diversity, viability and ecological function at the species, population and assemblage level.

The development may have an impact on an isolated population of subterranean fauna.

E 1 Low • The site is sand over limestone with no subterranean cavities recorded.

• The site is cleared. • The separation to the water table will be around 15

metres and is determined by the final land surface provided by Latitude 32 in the structure planning for Development Area 5.

E 1 Low


Landform Research 4




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LANDFORMS

To maintain the variety, integrity, ecological functions and environmental values of landforms and soils.

The local landform may be altered to a form that is not compatible with the surrounding geomorphology.

E 1 Low • The end use will be industrial to Development Precinct 5, of latitude 32. The landform will conform to the contours required by the Master Plan.

E 1 Low

The final land surface should be fit for its required end use.

E 1 Low • The end use will be industrial to Development Precinct 5, of latitude 32. The landform will conform to the contours required by the Master Plan.

E 1 Low

The development and final landform will not lead to significant visual impacts.

E 1 Low • The proposed excavation is set back from existing and proposed road networks with bunding already in place to manage visual impacts.

• The excavation and closure will be partly visible but not from Russell Road and largely from “non sensitive” land.

E 1 Low

The final landform and soils may be subject to erosion by wind, water or other processes.

E 1 Low • The final soils will be stabilised and sown to pasture to the requirements of Latitude 32 and in preparation of the implementation of the Master Plan.

E 1 Low

Acid soils are not exposed or are managed to ensure that there are no long term adverse effects.

E 1 Low • There is no evidence of acid sulfate conditions that will be disturbed during excavation.

• The final land surface will be 15 metre above the water table and saturated zone.

E 1 Low

The project has been assessed for karst features and has been designed to mitigate impacts on known and features that may potentially be present.

E 1 Low • The site is sand over limestone with no subterranean cavities recorded.

• The site is cleared. • The separation to the water table will be around 15


2.2 Geology and Geomorphology

E 1 Low


Landform Research 5




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HYDRO - GEOLOGICAL PROCESSES To maintain the hydrological regimes of groundwater and surface water so that existing and potential uses, including ecosystem maintenance, are protected.

The ecological functions of watercourses are to be maintained.

• There are no watercourses.

Groundwater may be impacted by changes to recharge, over-pumping, alterations to flow paths or lead to significant evaporation and water loss.

D 2 Low • The site is cleared. • The separation to the water table will be around 15


• Complies with DOW separation between the water table and the land surface.

D 2 Low

Wetlands may be altered by draining or flooding, potentially changing their ecological functions and biodiversity.

• There are no wetlands or wetlands that will be impacted.

• Recharge will remain similar and slightly increase as a result of clearing.

E 1 Low

WATER QUALITY

To maintain the quality of groundwater and surface water, sediment and biota so that the environmental values, both ecological and social, are protected.

Hydrocarbons, fuels and other chemicals are stored in a manner that they pose no risk to the environment.

C L High • Extensive management procedures are proposed. • The site is cleared. • The separation to the water table will be around 15


• Complies with DOW separation between the water table and the land surface.

Management Plan D 2 Low

Runoff from operations is contained and all

D 2 Low • All water is to be retained on site in the base of the pit similar to pre and post excavation.

Mining Proposal E 2 Low


Landform Research 6

water is either retained or treated to removed sediment and any deleterious materials.

Water quality during and after development and operations is not adversely affected or altered.

D 2 Low • All water is to be retained on site in the base of the pit similar to pre and post excavation.

• Extensive water management plans are proposed to protect water quality.

Mining Proposal D 1 Low


Landform Research 7




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OFFSITE EMISSIONS

To maintain representation, diversity, viability and ecological function at the species, population and community level.

Dust emissions are minimised or controlled to ensure that the local amenity is protected.

B 3 High • Extensive Dust Management Procedures are proposed.

• Dust Management Plan has been approved by the City of Cockburn.

• The land is cleared. • A complaints procedure is in place. • The local residents were notified prior to clearing and

were supplied with contact details. • Perimeter bunding will assist with dust and noise

management.

Dust Management Plan

E 1 Low

Dust emissions will not significantly impact on local and on site personnel health or quality of life.

E 1 Low • See above. Dust Management Plan E 1 Low

Noise levels will comply with the Environmental Protection (Noise) Regulations 1997.

E 1 Low • Noise levels will comply with Environmental Protection (Noise) Regulations 1997.

• A Noise Study was completed by Herring Storer Acoustics

• Perimeter bunding will assist with visual, dust and noise management.

Mining Proposal E 1 Low

Noise levels and operational procedures will be used to protect on site personnel health and safety.

C 3 High • The operations are designed to minimise on site noise and the potential for offsite noise.

• See above

Mining Proposal D 2 Low

Emissions gases and other materials potentially adverse to human health will not be used or will be managed.

D 2 Low • There are no gaseous or other potential harmful emissions from the operations.

NA D 2 Low

Potential impacts from blasting will comply with the Environmental Protection (Noise)

NA • There will be no blasting. NA NA


Landform Research 8

Regulations 1997 and guidelines for ground vibration. Employ procedures and design the operations to minimise the risk of excessive greenhouse emissions.

E 1 Low • The whole purpose of this proposal is to extract sand and limestone from as close as possible to the destination, reducing emissions of green house gases to the minimum.

• The excavation is to prepare the site for industrial land use.

E 1 Low


Landform Research 9




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HERITAGE

Known heritage sites will be protected.

Known aboriginal heritage sites will be protected.

E 1 Low • No archaeological or ethnographic sites are known. The site is cleared.

E 1 Low

Sites of European heritage will be protected.

NA • None known NA

Heritage sites uncovered during operations will be independently assessed and managed through communication with the community, Government and traditional owners.

E 1 Low • A commitment is made to this. E 1 Low






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SOCIAL and HEALTH

To minimise the impact on the local community

Human health is protected from adverse impacts of dust, noise, other emissions and chemicals.

E 1 Low • Silica sand and limestone has no known health impacts.

• Effective dust management is proposed. • Dust is mainly organic during land clearing and from

road traffic, which is to be managed through best practice environmental dust and occupational health measures that are normal at any similar working sand quarry.

• The health and safety risks are well known and are managed under the Mines Safety and Inspection Act and the DMP SRS System.

E 1 Low

Transport may impact on local, and regional roads or school bus routes.

E 1 Low • The purpose of this proposal is to extract sand and limestone from as close as possible to the destination, reducing emissions of green house gases to the minimum.

• The operations are approved, taking into account potential transport impacts.

E 1 Low

The operations have been designed to provide sufficient buffers and visual protection.

E 1 Low • Perimeter bunding will assist with visual, dust and noise management.

• The proposed excavation is set back from existing and proposed road networks with bunding already in place to manage visual impacts.

• The excavation and closure will be partly visible but not from Russell Road and largely from “non sensitive” land.

• The operations are approved, taking into account potential visual impacts.

E 1 Low






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CLOSURE AND REHABILITATION

To ensure that premises are closed, decommissioned and rehabilitated in an ecologically sustainable manner, consistent with agreed outcomes and land uses, and without unacceptable liability to the State

At the end of excavation the created soils should be deep enough or of sufficient quality to be sustainable to meet the long term end use or ecological values.

B 3 High • The end use will be industrial to Development Precinct 5, of latitude 32. The landform will conform to the contours required by the Master Plan.

• Topsoil has been retained separate from the overburden and located in bunds around the perimeter, for use in land rehabilitation and stabilisation prior to an industrial end use.

Closure and Rehabilitation D 2 Low

All infrastructure, roads, hardstand, non natural materials are to be removed from site progressively when not required and all removed at the end of the project.

C 2 Med • This is committed to. Closure and Rehabilitation D 2 Low

No materials are to be left on site that may cause long term detrimental outcomes in terms of impacts to soils, water, heritage, vegetation health or other factors.

C 2 Med • This is committed to. Closure and Rehabilitation D 2 Low

All contaminated materials are to be removed from site prior to closure.

C 2 Med • All contaminated materials are to be removed from site prior to closure.

Closure and Rehabilitation D 2 Low






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SAFETY

To ensure that the project provides high levels of safety to on site personnel and the community

Ensure that the project provides high levels of safety to on site personnel.

C 3 High • The operations are designed to comply and operate to the Mines Safety and Inspection Act 1994.

• The operations are registered under the DMP SRS system.

• Hanson Construction Materials and the operator, WA Limestone have extensive safety management systems in place at all their operations.

• Officers from the Safety Division of the DMP will regularly inspect the operations in relation to health and safety.

D 2 Low




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COMMUNITY CONSULTATION

To provide a community consultation process commensurate with the size nature and time line of the project.

Community consultation assists by identifying and resolving concerns before they become significant issues.

NA • Extensive Dust Management Procedures are proposed.

• Dust Management Plan has been approved by the City of Cockburn.

• The land is cleared. • A complaints procedure is in place. • The local residents were notified prior to clearing and

were supplied with contact details. • Perimeter bunding will assist with dust and noise

management.

NA

A complaints and improvements procedure will assist management of the site.

NA • An ongoing complaints program is proposed as part of the program in place through Hanson Construction Materials and WA Limestone central office.

NA






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GEOTECHNICS

To ensure that all ground and geological materials is safe commensurate with the operations and final land surface.

The operational and final land surfaces will be made safe and not subject to subsidence, slippage or other adverse conditions.

E 1 Low • The end use will be a gently sloping floor with rehabilitated sloping sides in compliance with the safety considerations of the Mines Safety and Inspection Act 1995 and the requirements and guidelines of the Department of Mines and Petroleum; for example Guidelines on Safety Bund Walls Around Abandoned Open Pits 1991.

• The end use will be industrial to Development Precinct 5, of latitude 32. The landform will conform to the contours required by the Master Plan.

E 1 Low

The quarry and operations will comply with the Mines Safety and Inspection Act 1994.

C 2 High • Hanson Construction Materials and the operator, WA Limestone are committed to complying with all relevant Acts and Regulations.

D 1 Low

The operational and final surfaces and features are designed to be not affected by extreme climate events.

E 1 Low • The site will be internally draining with large capacity to retain water during excavation and on completion and rehabilitation.

E 1 Low



RISK MATRIX

Effect / Consequence 1 2 3 4 5 Type Insignificant Minor Moderate Major Severe Environmental Impact No discernible,

adverse impact, individuals of species may be affected locally.

Discernible effect on the environment but no adverse impact, minor number of individuals of species may be affected locally

Minor adverse effect to the environment (including public amenity), moderate loss of individuals of species locally.

Moderate damage to ecosystem function, major loss of individuals of species locally, loss of public amenity.

Significant long-term damage/loss to ecosystem function, extinction of a species locally

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A Almost Certain

Likely that the unwanted event could occur often (once per week) during the life of an individual item or system

Medium 11

High 16

High 20

Very High 23

Very High 25

B Likely

Likely that the unwanted event could occur several times per year during the life of an individual item or system.

Medium 7

Medium 12

High 17

High 21

Very High 24

C Possible

Likely that the unwanted event could occur sometime (once per year) during the life of an individual item or system.

Low 4

Medium 8

High 13

High 18

High 22

D Unlikely

Unlikely, but possible for the unwanted event to occur once in the life of an individual item or system.

Low 2

Low 5

Medium 9

High 14

High 19

E Rare

Highly unlikely that the unwanted event could ever occur in the life of an individual item or system.

Low 1

Low 3

Medium 6

Medium 10

High 15

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MINE CLOSURE PLAN to accompany Mining Proposal M70/1275 …

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