STATEMENT of ENVIRONMENTAL EFFECTS Mt Boppy Gold Mine Report No

ABN: 71 124 374 321

Statement of Environmental Effects

for the

Mt Boppy Gold Mine

March 2015

Prepared by:

R.W. CORKERY & CO. PTY. LIMITED

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ABN: 71 124 374 321

Statement of Environmental Effects

for the

Mt Boppy Gold Mine

Prepared for: Black Oak Minerals Limited Telephone: (07) 3236 2511 ABN: 71 124 374 321 Email: [email protected] Level 1, 160 Wharf Street SPRING HILL QLD 4000

GPO BOX 519 BRISBANE QLD 4001 Prepared by: R.W. Corkery & Co. Pty. Limited Geological & Environmental Consultants ABN: 31 002 033 712

Brooklyn Office: Orange Office: Brisbane Office: 1st Floor, 12 Dangar Road 62 Hill Street Suite 5, Building 3 PO Box 239 ORANGE NSW 2800 Pine Rivers Office Park BROOKLYN NSW 2083 205 Leitchs Road BRENDALE QLD 4500 Telephone: (02) 9985 8511 Telephone: (02) 6362 5411 Telephone: (07) 3205 5400 Facsimile: (02) 6361 3622 Facsimile: (02) 6361 3622 Facsimile: (02) 6361 3622 Email: [email protected] Email: [email protected] Email: [email protected] Ref No. 569/05 March 2015

BLACK OAK MINERALS LIMITED STATEMENT OF ENVIRONMENTAL EFFECTS Mt Boppy Gold Mine Report No. 569/05

This Copyright is included for the protection of this document

All intellectual property and copyright reserved.

Apart from any fair dealing for the purpose of private study, research, criticism or review, as permitted under the Copyright Act, 1968, no part of this report may be reproduced, transmitted, stored in a retrieval system or adapted in any form or by any means (electronic, mechanical, photocopying, recording or otherwise) without written permission. Enquiries should be addressed to R.W. Corkery & Co. Pty Limited.

STATEMENT OF ENVIRONMENTAL EFFECTS BLACK OAK MINERALS LIMITED Report No. 569/05 Mt Boppy Gold Mine CONTENTS Page LIST OF ABBREVIATIONS ...... IX

EXECUTIVE SUMMARY...... XI

1. INTRODUCTION ...... 1 1.1 SCOPE ...... 1 1.2 FORMAT OF THE STATEMENT ...... 1 1.3 THE APPLICANT AND BACKGOUND TO THE PROPOSED MODIFICATION ...... 3 1.4 OVERVIEW OF EXISTING OPERATIONS ...... 4 1.4.1 Existing Approvals ...... 4 1.4.2 Approved Mine Operations ...... 5 1.4.3 Environmental Performance ...... 7 1.5 CONSULTATION ...... 7 1.6 MANAGEMENT OF INVESTIGATIONS ...... 8

2. DESCRIPTION OF THE PROPOSED MODIFICATION ...... 9 2.1 INTRODUCTION ...... 9 2.1.1 Objectives ...... 9 2.1.2 Overview of the Proposed Modification ...... 9 2.1.3 Modifications Sought ...... 11 2.2 GEOLOGY AND RESOURCES...... 12 2.3 MODIFIED MINING OPERATIONS ...... 12 2.4 WASTE ROCK MANAGEMENT ...... 13 2.4.1 Introduction ...... 13 2.4.2 Waste Rock Characterisation ...... 13 2.4.3 Waste Classification and Volumes ...... 15 2.4.4 Waste Rock Emplacement Design and Management ...... 16 2.5 PROCESSING RESIDUES AND TAILINGS ...... 17 2.6 WATER MANAGEMENT ...... 17 2.6.1 Surface Water Management ...... 17 2.6.2 Mine Water Management ...... 17 2.7 TRANSPORTATION ...... 20 2.7.1 Mine Site Entrances and Access ...... 20 2.7.2 Ore Transportation ...... 20 2.8 HOURS OF OPERATION AND MINE LIFE ...... 21 2.8.1 Hours of Operation ...... 21 2.8.2 Mine Life ...... 22 2.9 REHABILITATION ...... 22 2.9.1 Introduction ...... 22 2.9.2 Rehabilitation Objectives...... 22 2.9.3 Final Landform and Land Uses ...... 23 2.9.4 Rehabilitation Procedures ...... 25 2.9.5 Rehabilitation Implementation and Monitoring ...... 27

BLACK OAK MINERALS LIMITED STATEMENT OF ENVIRONMENTAL EFFECTS Mt Boppy Gold Mine Report No. 569/05 CONTENTS Page 3. ENVIRONMENTAL SETTING ...... 28 3.1 INTRODUCTION ...... 28 3.2 TOPOGRAPHY AND DRAINAGE ...... 28 3.2.1 Regional Topography and Drainage ...... 28 3.2.2 Local Topography and Drainage ...... 28 3.3 SOIL AND LAND CAPABILITY ...... 31 3.4 CLIMATE ...... 31 3.4.1 Introduction ...... 31 3.4.2 Data Sources ...... 31 3.4.3 Temperature and Humidity ...... 32 3.4.4 Rainfall...... 32 3.4.5 Winds...... 33 3.5 LAND USE AND LAND OWNERSHIP ...... 33 3.5.1 Land Uses ...... 33 3.5.2 Land Ownership ...... 33

4. ASSESSMENT AND MANAGEMENT OF KEY ENVIRONMENTAL ISSUES ...... 36 4.1 INTRODUCTION ...... 36 4.2 ACID FORMING MATERIAL ...... 36 4.2.1 Introduction ...... 36 4.2.2 Operational Controls and Management Measures ...... 36 4.2.3 Assessment of Impacts ...... 37 4.3 TRAFFIC AND TRANSPORTATION ...... 38 4.3.1 Introduction ...... 38 4.3.2 Existing Environment ...... 38 4.3.3 Traffic Levels ...... 39 4.3.4 Intersection performance...... 39 4.3.5 Operational Controls and Management Measures ...... 40 4.3.6 Assessment of Impacts ...... 40 4.4 NOISE ...... 40 4.4.1 Introduction ...... 40 4.4.2 Existing Environment ...... 40 4.4.3 Assessment Criteria ...... 41 4.4.4 Operational Noise Assessment Results ...... 41 4.4.5 Negotiated Agreements with Surrounding Residents ...... 46 4.4.6 Road Traffic Noise Assessment ...... 47 4.4.7 Controls and Operational Safeguards ...... 48 4.4.8 Assessment of Impacts ...... 48 4.5 AIR QUALITY ...... 48 4.5.1 Introduction ...... 48 4.5.2 Existing Environment ...... 49 4.5.3 Assessment Criteria ...... 50 4.5.4 Assessment Methodology ...... 50 4.5.5 Assessment Results ...... 51

STATEMENT OF ENVIRONMENTAL EFFECTS BLACK OAK MINERALS LIMITED Report No. 569/05 Mt Boppy Gold Mine CONTENTS Page 4.5.6 Operational Controls and Management Measures ...... 52 4.5.7 Assessment of Impacts ...... 52 4.5.8 Monitoring ...... 53 4.6 GENERAL ASSESSMENT OF ENVIRONMENTAL EFFECTS ...... 53

5. EVALUATION OF THE PROPOSAL ...... 58 5.1 INTRODUCTION ...... 58 5.2 EVALUATION OF RESIDUAL EFFECTS ...... 58 5.2.1 Biophysical Considerations ...... 58 5.3 SOCIO-ECONOMIC CONSIDERATIONS ...... 59 5.4 SECTION 96(2) CONSIDERATIONS ...... 60 5.4.1 Introduction ...... 60 5.4.2 Substantially the Same Development ...... 60 5.4.3 Consultation with the Relevant Minister, Public Authority or Approval Body ...... 60 5.4.4 Notification of the Application ...... 61 5.4.5 Submissions Regarding the Proposal ...... 61 5.5 SECTION 79C(1) CONSIDERATIONS ...... 61 5.5.1 Introduction ...... 61 5.5.2 Environmental Planning Instruments, Plans and Regulations (Section 79C (1a)) ...... 61 5.5.3 Likely Impacts of the Development (Section 79C (1b)) ...... 65 5.5.4 Suitability of the Site (Section 79C (1c)) ...... 65 5.5.5 Submissions (Section 79C (1d)) ...... 65 5.5.6 The Public Interest (Section 79C (1e)) ...... 65 5.6 OBJECTS OF THE EP&A ACT ...... 65 5.7 CONCLUSION ...... 66

6. REFERENCES ...... 68

APPENDICES Appendix 1 Application to Modify Development Consent DA 2011/LD00070 ...... A1-1 Appendix 2 Development Consents DA 2006/LDA-00015 and DA 2011/LD00070 ...... A2-1 Appendix 3 Government Agency Correspondence ...... A3-1 Appendix 4 A Summary of Assessment Requirements and where each has been addressed ...... A4-1 Appendix 5 Waste Characterisation Assessment ...... A5-1 Appendix 6 Traffic Impact Assessment ...... A6-1 Appendix 7 Noise Impact Assessment ...... A7-1 Appendix 8 Air Quality Impact Assessment ...... A8-1

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BLACK OAK MINERALS LIMITED STATEMENT OF ENVIRONMENTAL EFFECTS Mt Boppy Gold Mine Report No. 569/05 CONTENTS Page FIGURES Figure A Locality Plan ...... xi Figure B Approved Site Layout ...... xiii Figure C Proposed Mine Site Layout ...... xiv Figure 1.1 Locality Plan ...... 2 Figure 1.2 Approved Site Layout ...... 6 Figure 2.1 Proposed Mine Site Layout ...... 10 Figure 2.2 Final Landform and Post-mining Land Use ...... 24 Figure 3.1 Regional Topography and Drainage ...... 29 Figure 3.2 Local Topography, Drainage, Land Use and Vegetation ...... 30 Figure 3.3 Wind Roses ...... 34 Figure 3.4 Land Ownership and Residential Receivers ...... 35 Figure 4.1 Noise Scenario 1 – Pre-stripping ...... 42 Figure 4.2 Noise Scenario 2 – Operational Mining (6 to 18 months) ...... 43 Figure 4.3 Noise Scenario 3 – Ore Transportation (18 to 24 months) ...... 44

TABLES Table 1.1 Current Consents, Authorisations and Licenses ...... 4 Table 1.2 Summary of Government Agency Consultation ...... 8 Table 2.1 Open Cut Water Quality ...... 18 Table 2.2 Proposed Hours of Operation ...... 22 Table 2.3 Rehabilitation Objectives and Targets ...... 22 Table 3.1 Monthly Meteorological Data...... 32 Table 4.1 Existing and Forecast Daily Traffic Volumes (vehicles per day) ...... 39 Table 4.2 Predicted Operational Noise Levels ...... 45 Table 4.3 Predicted Maximum Night Time Operational Noise Levels ...... 46 Table 4.4 Comparison of 2012 and Current Predicted Noise Levels ...... 46 Table 4.5 Predicted Road Traffic Noise Levels ...... 47 Table 4.6 Background Air Quality at the Mine...... 49 Table 4.7 Air Quality Assessment Goals...... 50 Table 4.8 Modelled Particulate Matter Levels at the Mine ...... 51 Table 4.9 Assessment of Impacts for Remaining Environmental Issues ...... 54 Table 5.1 Application of SEPP (Mining, Petroleum Production and Extractive Industries) 2007 ...... 62 Table 5.2 Objects of the EP&A Act ...... 65

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STATEMENT OF ENVIRONMENTAL EFFECTS BLACK OAK MINERALS LIMITED Report No. 569/05 Mt Boppy Gold Mine

LIST OF ABBREVIATIONS

AHD Australian Height Datum

ANFO Ammonium Nitrate Fuel Oil bcm bank cubic metre – a volume of 1m3 in the ground prior to disturbance

BOM Bureau of Meteorology

DA Development Approval

EP&A Act Environmental Planning and Assessment Act 1979

EPA Environment Protection Authority

EPBC Act Environment Protection and Biodiversity Conservation Act 1999 ha hectare

INP Industrial Noise Policy m metre

ML Mining Lease

ML Million Litres

MPL Mining Purpose Lease

Mtpa Million tonnes per annum

NOW NSW Office of Water

ROM Run-Of-Mine

SoEE Statement of Environmental Effects t tonne

µS/cm Micro-siemens per centimetre

WRE Waste Rock Emplacement

BLACK OAK MINERALS LIMITED STATEMENT OF ENVIRONMENTAL EFFECTS Mt Boppy Gold Mine Report No. 569/05

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STATEMENT OF ENVIRONMENTAL EFFECTS BLACK OAK MINERALS LIMITED Report No. 569/05 Mt Boppy Gold Mine

EXECUTIVE SUMMARY

This Statement of Environmental Effects The Applicant has owned and operated the (SoEE) has been prepared by R.W. Corkery Mt Boppy Mine, through its wholly owned & Co. Pty Limited on behalf of Black Oak subsidiary Polymetals (Mt Boppy) Ltd, Minerals Limited (the Applicant) to since 1993, with the most recent operations accompany an application to Cobar Shire on the site being between 2002 and 2005. Council to modify Development Consent Since 2005 the Mine has been on care and DA 2011/LD00070 (the Proposed maintenance. However, development Modification) for the Mt Boppy Mine (the approval was received in 2012 Mine). The Mine is located adjacent to the (2011/LD00070) to recommence mining village of Canbelego, approximately 48km and processing. Approval is also retained east of Cobar NSW (Figure A). for the haulage of ore to The Peak Mine under Development Consent The Proposed Modification has been lodged 2006/LD00015. In September 2014, the under Section 96(2) of the Environmental Applicant purchased the liquidated assets of Planning and Assessment Act 1979 and will the Wonawinta Mine (now Manuka Mine). be considered Integrated Development An opportunity was identified to utilise, under Section 91 of that Act as with some modification, the existing Environment Protection Licence 20192 processing infrastructure at the Manuka issued for the Mine will also require Mine to process Mt Boppy ore. In variation. consolidating the two mining operations, a range of aspects relating to the existing approved operations require modification.

Figure A Locality Plan A5 / Full colour

BLACK OAK MINERALS LIMITED STATEMENT OF ENVIRONMENTAL EFFECTS Mt Boppy Gold Mine Report No. 569/05

Existing and Approved Operations  Capping of the existing non- The principal components of the approved rehabilitated Tailings Storage Facility 3 Mine under DA 2006/LDA-00015 are as (TSF 3). follows (Figure B).  Construction of a new Tailings Storage  Extraction and crushing of up to Facility 11 (TSF 11). 700 000t of ore and backfill sand at a rate of up to 150 000tpa. Cobar Shire Council has confirmed that DA 2011/LD-00070 has yet to physically  Transportation of that material from the commence, with the Consent to lapse on Mine Site to the Peak Gold Mine via the 15 October 2017 should physical Gilgunnia – Canbelego Road, Barrier commencement not occur before that date. Highway and Kidman Way using 50t capacity double road trains. The Proposed Modification  Processing of transported ore at the Peak The principle components of the Proposed Gold Mine. Modification are as follows and are displayed in Figure C.  Capping and rehabilitation of Tailings Storage Facility 3 using oxidised waste  Minor modification of pit design to rock. provide for the recovery of approximately 630 000t of ore. The principal components of the approved  Rationalisation / redesign of the waste Mine under DA 2011/LD-00070 are as rock emplacements. follows (Figure B).  Recovery of approximately 500 000t of  Provision for the management of ore from an extension of the existing potentially acid forming waste rock open cut using conventional drill and within the waste rock emplacement and blast, load and haul methods. existing TSF 3.  Crushing, milling and processing of ore  Provision for transport of ore to and through the upgraded on-site plant using processing at the Manuka Mine. In standard cyanide leach and carbon particular, the Proposed Modification recovery methods at a rate of seeks to transport ore via the approved approximately 150 000tpa. transportation route via Gilgunnia- Canbelego Road, the Barrier Highway  Extension of the existing Waste Rock and Kidman Way using AB-triple Emplacement 1 (WRE 1) to create trucks. A separate application to modify Waste Rock Emplacement 2 (WRE 2). the approval for the Manuka Mine will  Rehabilitation of existing historic be prepared to seek approval to transport capped tailings storage areas using ore from the Kidman Way to the mined waste rock to create Waste Rock Manuka Mine. Emplacement 3 (WRE 3).  Construction of temporary water  Construction / improvement of noise holding dams for the management of bunds using waste rock. water from the open cut (thereby avoiding the need to discharge open cut water).

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STATEMENT OF ENVIRONMENTAL EFFECTS BLACK OAK MINERALS LIMITED Report No. 569/05 Mt Boppy Gold Mine

Figure B Approved Site Layout A4 / Full Colour

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BLACK OAK MINERALS LIMITED STATEMENT OF ENVIRONMENTAL EFFECTS Mt Boppy Gold Mine Report No. 569/05

Figure C Proposed Mine Site Layout

A4 / Full Colour

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STATEMENT OF ENVIRONMENTAL EFFECTS BLACK OAK MINERALS LIMITED Report No. 569/05 Mt Boppy Gold Mine

 Extension of hours of operation for  Predicted operational noise levels at mining to 24 hour per day, seven days surrounding residential receptors are per week. consistent with the previously predicted and approved noise levels and all  Refurbishment of the northern access privately-owned residences are subject road and intersection with the Gilgunnia to existing confidential agreements – Canbelago Road. concerning noise emissions from the  Adjustment of the timeframe for the Mine. provision of a biodiversity offset and  All road noise levels associated with incorporation into a consolidated Mine-related transportation are Biodiversity Offset Strategy for the predicted to be compliant with the NSW Mt Boppy and Manuka Mines. Road Noise Policy, during all periods of operation. Evaluation and Justification  Only minor dust impacts would result The following conclusions are made throughout the Statement of Environmental from the Proposed Modification. Effects concerning potential impacts to the  There would be no additional impacts to biophysical or socio-economic biodiversity, Aboriginal cultural environment. heritage, surface water and groundwater  The residual risk of discharge of low pH resources, soil and land capability and leachate from the Mine Site during the visual amenity. operational or rehabilitation phase of the  There would be no additional adverse Mine would be low. impacts to the local or regional socio-  The use of 50t-capacity A-double road economic setting. Rather the Proposed trains initially would be consistent with Modification would result in beneficial the approved transportation operations impacts such as employment and and, as a result, there would be no expenditure on services. additional impacts compared to the approved operation of the Mine. Use of Based on the implementation of proposed the proposed 60t AB-triple road trains operational controls and management would commence only after completion measures, it is assessed that the Proposed Modification would be undertaken in a of a Road Audit for the approved manner that would satisfy all relevant transportation route and completion of statutory goals and criteria, environmental the required road upgrade. objectives and reasonable community expectations.

BLACK OAK MINERALS LIMITED STATEMENT OF ENVIRONMENTAL EFFECTS Mt Boppy Gold Mine Report No. 569/05

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STATEMENT OF ENVIRONMENTAL EFFECTS BLACK OAK MINERALS LIMITED Report No. 569/05 Mt Boppy Gold Mine

1. INTRO DUCTION

1.1 SCOPE

This Statement of Environmental Effects (SoEE) has been prepared by R.W. Corkery & Co. Pty Limited on behalf of Black Oak Minerals Limited (the Applicant) to accompany an application to Cobar Shire Council to modify Development Consent DA 2011/LD00070 (the Proposed Modification) for the Mt Boppy Mine (the Mine). A copy of the application form and the development consent are presented as Appendices 1 and 2 respectively. The Mine is located adjacent to the village of Canbelego, approximately 48km east of Cobar NSW (Figure 1.1).

The principal components of the Proposed Modification include:  Minor rationalisation of the site layout;  Transportation of ore via the approved transportation route using 60t AB-triple road trains; and  An extension to the hours of operation for mining to 24 hour per day, seven days per week.

The Proposed Modification has been lodged under Section 96(2) of the Environmental Planning and Assessment Act 1979 and is Integrated Development under Section 91 of the Act as Environment Protection Licence 20192 issued for the Mine will also require variation.

This SoEE describes the proposed changes to transportation, on-site operations and layout, describes the relevant features of the existing environment within and surrounding the Mine, and assesses the environmental effects of the Proposed Modification after a range of environmental safeguards are adopted.

The contents of this document also reflect the results of consultation with Cobar Shire Council and other government agencies. Copies of the correspondence received and a summary of where relevant requirements have been addressed are provided in Appendices 3 and 4 respectively.

1.2 FORMAT OF THE STATEMENT

This SoEE has been prepared in five sections together with references and a set of appendices.

Section 1: Introduces the Proposed Modification and the Applicant and briefly reviews the background to the Proposed Modification, the existing operations of the Mine and consultation undertaken for the Proposed Modification.

Section 2: Describes the Proposed Modification in detail and highlights where it differs from the currently approved operation. This section also provides an overview of planned rehabilitation of the Mine.

Section 3: Briefly describes specific aspects of the environmental setting within and surrounding the Mine.

BLACK OAK MINERALS LIMITED STATEMENT OF ENVIRONMENTAL EFFECTS Mt Boppy Gold Mine Report No. 569/05

Figure 1.1 Locality Plan (A4 Colour) Dated 19/3/15 inserted 19/3/15

STATEMENT OF ENVIRONMENTAL EFFECTS BLACK OAK MINERALS LIMITED Report No. 569/05 Mt Boppy Gold Mine

Section 4: Describes and presents the assessment of specific environmental impacts arising from the Proposed Modification and management measures that the Applicant has incorporated into the Proposed Modification to minimise impact on the biophysical, social and economic environment, surrounding the Mine.

Section 5: Provides an evaluation of the Proposed Modification with respect to the relevant planning instruments and provides a justification of the Proposed Modification with respect to biophysical, economic and social considerations.

References: Provides a list of documents that were referenced during the preparation of this document.

The document concludes with a set of appendices as follows.

Appendix 1: A copy of the application to modify Development Consent DA 2011/LD00070.

Appendix 2: A copy of Development Consent DA 2011/LD00070, as currently approved.

Appendix 3: A copy of correspondence with Cobar Shire Council and the various government agencies regarding assessment requirements for the Proposed Modification.

Appendix 4: A summary of assessment requirements and where each has been addressed.

Appendix 5: A waste characterisation assessment report prepared by RGS Environmental

Appendix 6: A traffic impact assessment report prepared by Constructive Solutions.

Appendix 7: A noise impact assessment report prepared by SLR Consulting.

Appendix 8: An air quality assessment report prepared by SLR Consulting.

1.3 THE APPLICANT AND BACKGOUND TO THE PROPOSED MODIFICATION

Polymetals Mining Ltd was incorporated in 1986, publicly listed in May 2011 and merged with Southern Cross Goldfields Limited in 2013. Southern Cross Goldfields Limited subsequently changed its name to Black Oak Minerals Limited in December 2014. For the purposes of this document, these Companies are collectively referred to as the “Applicant”. The Applicant has owned and operated the Mt Boppy Mine, through its wholly owned subsidiary Polymetals (Mt Boppy) Ltd, since 1993, with the most recent operations on the site being between 2002 and 2005. Since 2005 the Mt Boppy Mine has been on care and maintenance. However, development approval was received in 2012 (2011/LD00070) to recommence mining and processing. Approval is also retained for the haulage of ore to The Peak Mine under Development Consent 2006/LD00015. In September 2014, the Applicant purchased the liquidated assets of the Wonawinta Mine (now Manuka Mine) with the objective of recovering and processing the remaining ore contained on the ROM pad, other stockpiles and the two open cuts. An opportunity was identified to utilise, with some modification, the existing processing infrastructure at the Manuka Mine to process Mt Boppy ore.

BLACK OAK MINERALS LIMITED STATEMENT OF ENVIRONMENTAL EFFECTS Mt Boppy Gold Mine Report No. 569/05

In consolidating the two mining operations, a range of aspects relating to the existing approved operations require modification. These are described in detail in Section 2.

1.4 OVERVIEW OF EXISTING OPERATIONS

1.4.1 Existing Approvals

Table 1.1 provides a summary of the relevant consents, authorisations and licences held by the Applicant for the Mine. Table 1.1

Current Consents, Authorisations and Licenses Page 1 of 2 Approval/Lease/Licence Issue Date Expiry Date Details / Comments Development Approvals Development Consent 22 June 2006 Not Specified Granted by Cobar Shire Council for the extension 2006/LDA-00015 of the existing open cut and transportation of up to 700 000t of ore and gold-bearing backfill sands to Peak Gold Mines for processing. Cobar Shire Council has confirmed that this approval has physically commenced. Development Consent 27 September Not Specified Granted by Cobar Shire Council for the extension 2011/LD-00070 (the 2012 and operation of the Mine, recovering subject of this application) approximately 500 000t of ore, and refurbishment and operation of the processing facility for a processing rate of approximately 150 000tpa. Cobar Shire Council has confirmed that this approval has yet to physically commence, with the Consent to lapse on 15 October 2017 should physical commencement not occur before that date. Development Consent 22 November Not Applicable Granted by Cobar Shire Council for the 2012/LD-00034 2012 expansion of the mining camp. Mining Authorisations1 Gold Lease 3255 20 May 1926 20 May 2033 Incorporating 8.281ha with no surface exceptions or depth restrictions. Gold Lease 5836 15 June 1965 15 June 2033 Incorporating 6.045ha with no surface exceptions or depth restrictions. Gold Lease 5848 15 February 15 June 2033 Incorporating 8.625ha with no surface exceptions 1968 or depth restrictions. Gold Lease 5898 21 June 1972 12 December Incorporating 7.512ha with no surface exceptions 2033 or depth restrictions. Mining Lease 311 08 December 12 December Incorporating 10.117ha with no surface 1976 2033 exceptions and a depth restriction of 3m. Mining Purpose Lease 240 17 January 12 December Incorporating 17.8ha with no surface exceptions 1986 2033 and a depth restriction of 2m. Mining Lease 1681 12 December 12 December Incorporating 188.1ha with no surface exceptions 2012 2033 or depth restrictions.

STATEMENT OF ENVIRONMENTAL EFFECTS BLACK OAK MINERALS LIMITED Report No. 569/05 Mt Boppy Gold Mine

Table 1.1 (Cont’d)

Current Consents, Authorisations and Licenses Page 2 of 2 Approval/Lease/Licence Issue Date Expiry Date Details / Comments Other Approvals & Licences (Cont’d) Environment Protection 10 January Not Applicable Issued by the NSW Environment Protection Licence No. 20192 2013 Authority (EPA) under the Protection of the Environment Operations Act 1997. Groundwater Licence 12 January 16 March 2015 Issued by the NSW Office of Water (NOW) for 85WA752612 2012 the water supply works associated with production bore PBP0172. Groundwater Licence 10 June 2013 06 June 2023 Issued by NOW for the water supply works 85WA753524 associated with excavation of the open cut. Water Access Licence 14 June 2012 Not Applicable Issued by NOW providing entitlement to 250ML WAL30045 from the Lachlan Fold Belt MDB Groundwater Source. Note 1: See Figure 1.2

1.4.2 Approved Mine Operations

The approved layout (Development Consent 2011/LD-00070) and relevant mining tenement boundaries for the 2006 approval and are shown on Figure 1.2. The boundary of the approved Waste Rock Emplacement under Development Consent 2006/LDA-00015 is also shown on Figure 1.2.

The principal components of the approved Mine under DA 2006/LDA-00015 are as follows.  Extraction and crushing of up to 700 000t of ore and backfill sand at a rate of up to 150 000tpa.  Transportation of that material from the Mine Site to the Peak Gold Mine via the Gilgunnia – Canbelego Road, Barrier Highway and Kidman Way using 50t capacity double road trains.  Processing of transported ore at the Peak Gold Mine.  Capping and rehabilitation of Tailings Storage Facility 3 using oxidised waste rock.

The principal components of the approved Mine under DA 2011/LD-00070 are as follows.  Recovery of approximately 500 000t of ore from an extension of the existing open cut using conventional drill and blast, load and haul methods.  Crushing, milling and processing of ore through the upgraded on-site plant using standard cyanide leach and carbon recovery methods at a rate of approximately 150 000tpa.  Extension of the existing Waste Rock Emplacement 1 (WRE 1) to create Waste Rock Emplacement 2 (WRE 2).

BLACK OAK MINERALS LIMITED STATEMENT OF ENVIRONMENTAL EFFECTS Mt Boppy Gold Mine Report No. 569/05

Figure 1.2 Approved Site Layout (A4 Colour) Dated 5/3/15 Inserted 19/3/15

STATEMENT OF ENVIRONMENTAL EFFECTS BLACK OAK MINERALS LIMITED Report No. 569/05 Mt Boppy Gold Mine

 Rehabilitation of existing historic capped tailings storage areas using mined waste rock to create Waste Rock Emplacement 3 (WRE 3).  Construction/improvement of noise bunds using waste rock.

 Capping of the existing non-rehabilitated Tailings Storage Facility 3 (TSF 3).

 Construction of a new Tailings Storage Facility 11 (TSF 11).

As discussed in Section 1.3, approval is also retained for the haulage of ore to The Peak Mine under Development Consent 2006/LD00015.

1.4.3 Environmental Performance

An appreciation of the standard of environmental performance, from the community’s perspective, is often gauged through any complaints received directly or through the EPA or Council. Non-compliances with operating conditions are also an indication of environmental performance.

Complaints The Applicant has received no complaints since 2005 whilst the Mine has been on care and maintenance.

Compliance Operations have not yet commenced under Development Consent 2011/LD-00070 and therefore no compliance issues have arisen.

Environment Protection Licence 20192 was granted 10 January 2013. Since that time, one annual return has been submitted for the period 10 January 2013 to 9 January 2014 and records no non-compliances. The annual return for the period 10 January 2014 to 09 January 2015 is currently being prepared. No environmental non-compliances occurred during this period.

1.5 CONSULTATION

Initial consultation with Cobar Shire Council was undertaken with Mr Stephen Poulter, Acting Director of Planning and Environmental Services. It was agreed that the Applicant would consult with each government agency directly in lieu of convening a Planning Focus Meeting. Table 1.2 provides a summary of the agencies contacted including whether a response and/or assessment requirements were provided. Where assessment requirements have been provided, they are presented in Appendix 3 and summarised in Appendix 4, together with a cross reference of where each item raised has been addressed in this document.

BLACK OAK MINERALS LIMITED STATEMENT OF ENVIRONMENTAL EFFECTS Mt Boppy Gold Mine Report No. 569/05

Table 1.2

Summary of Government Agency Consultation Assessment Response Requirements Agency Received Provided Cobar Shire Council 10/12/14 Yes Division of Resources and Energy Nil No Environmental Protection Authority 18/12/14 Yes Office of Environment and Heritage 17/12/14 Yes NSW Office of Water 19/12/14 Yes Roads and Maritime Services 23/12/14 Yes

1.6 MANAGEMENT OF INVESTIGATIONS

The preparation of this document has involved a study team managed by Mr Scott Hollamby (B.EnvSc (Hons)), Senior Environmental Consultant of R.W. Corkery & Co. Pty Limited. Mr Nicholas Warren (B.Sc., M.Bus M EnvSc), Environmental Consultant with the same Company assisted with preparation of this document. Mr Mitchell Bland, (B.Sc(Hons), MEconGeol, LLB(Hons)), Principal Environmental Consultant with the Company undertook an internal review.

Representatives from Black Oak Minerals Limited also assisted with the preparation of this document, including:  Mr Troy Lowien, General Manager Mineral Resources and Compliance; and  Mr David Sproule, Managing Director.

A number of specialist studies were also commissions through the following specialist consultants.  Waste Characterisation and Assessment – RGS Environmental. – Dr Alan Robertson (HND, PhD (Pure and Applied Chemistry)).  Traffic and Transport Assessment – Constructive Solutions. – Mr Mick Bloem (BEng (Civil)).  Air Quality Assessment – SLR Consulting. – Dr Martin Doyle (PhD, BSc (Hons), AAirqual). – Mr Varun Marwaha (BEng (Environment), CPPM).  Noise Assessment – SLR Consulting. – Mr Nathan Archer, BEng Civil (Hons).

STATEMENT OF ENVIRONMENTAL EFFECTS BLACK OAK MINERALS LIMITED Report No. 569/05 Mt Boppy Gold Mine

2. DESCRIPTION OF THE P R O P O S E D MODIFICATION

2.1 INTRODUCTION

2.1.1 Objectives

The Applicant’s objectives in modifying DA 2011/LD00070 are as follows.  To consolidate operations at the Mt Boppy Mine (in parallel with a separate application in relation to the Manuka Mine) to create operational efficiencies that ensure the longevity of both operations.  To modify existing components of the Mine to improve the efficiency of recovery of ore materials and management of waste rock.  To develop and operate the Mine in a manner that complies with all statutory requirements.  To minimise, to the maximum extent practicable, the impact on the local environment and community and other stakeholders.  Achieve the above objectives in a cost-effective manner to ensure that operations are economically viable.

2.1.2 Overview of the Proposed Modification

The principle components of the Proposed Modification are as follows (Figure 2.1).  Minor modification of pit design to provide for the recovery of approximately 630 000t of ore.  Rationalisation / redesign of the waste rock emplacements.  Provision for the management of potentially acid forming waste rock within the waste rock emplacement and existing TSF 3.  Provision for transport of ore to and processing at the Manuka Mine. In particular, the Proposed Modification seeks to transport ore via the Gilgunnia-Canbelego Road, the Barrier Highway and Kidman Way using AB-triple trucks. A separate application to modify the approval for the Manuka Mine will be prepared to seek approval to transport ore from the Kidman Way to the Manuka Mine.  Construction of temporary water holding dams for the management of water from the open cut (thereby avoiding the need to discharge open cut water).  Extension of hours of operation for mining to 24 hour per day, seven days per week.

BLACK OAK MINERALS LIMITED STATEMENT OF ENVIRONMENTAL EFFECTS Mt Boppy Gold Mine Report No. 569/05

Figure 2.1 Proposed Mine Site Layout

A4/Colour

Dated 23/3/15 inserted 23/3/15

STATEMENT OF ENVIRONMENTAL EFFECTS BLACK OAK MINERALS LIMITED Report No. 569/05 Mt Boppy Gold Mine

 Refurbishment of the northern access road and intersection with the Gilgunnia – Canbelago Road.  Adjustment of the timeframe for the provision of a biodiversity offset and incorporation into a consolidated Biodiversity Offset Strategy for the Mt Boppy and Manuka Mines.

2.1.3 Modifications Sought

The Applicant is seeking the following modifications to DA 2011/LD-00070. It is noted that, as part of the modification, the transportation provisions included in DA 2006-LDA00015 are proposed to be incorporated into DA 2011/LD00070 and DA2006/LDA-00015 surrendered (subject to approval of the Proposed Modification).

Additional proposed text is underlined and text proposed to be deleted is presented as strikethrough. Explanatory notes are presented in italicised text. 1. The development must be carried out in accordance with the documents listed below, except where amended by other conditions of this consent: Environmental Impact Statement for Polymetals Mining Limited prepared by David Houghton 23 November 2011 comprising EIS Main Text and Appendices A to N. Response to Submissions document, Development Application 2011/LD00070 Mt Boppy Gold Mine Expansion July 2012. Email correspondence from David Houghton 21 August 2012 to Garry Ryman item 3 response to inquiry from Office of Environment and Heritage. Polymetals Mining Limited letter dated 22 August 2012 prepared by David Houghton including Attachments A, B, C and D. Statement of Environmental Effects for the Mt Boppy Gold Mine Prepared by R.W. Corkery & Co. Pty Limited, March 2015. 23. The impact of the proposed development on biodiversity must be assessed (based on data collected in the field) and a binding agreement executed in respect of an agreed biodiversity offset strategy, to the satisfaction of Council and the Office of Environment and Heritage, within 9 months from the date of consent for Modification 1 being granted. 29. All trucks carrying ore from the Mine Site, including to the Peak Gold Mine, are to have their loads covered at all times. Transfer of Condition 10, as relevant, from DA 2006/LDA-00015.

BLACK OAK MINERALS LIMITED STATEMENT OF ENVIRONMENTAL EFFECTS Mt Boppy Gold Mine Report No. 569/05

2.2 GEOLOGY AND RESOURCES

The Mount Boppy Conglomerate Member is the dominant geological unit at Canbelego. The unit occupies the upper section of low hills surrounding the Mine Site.

Mineralisation at Mount Boppy is hosted by brecciated, highly silicified, fine-grained sediments of the Devonian Baledmund Formation and associated quartz veins. The mineralisation consists predominantly of gold with minor zinc, copper and lead. The characteristics of the ore are described as follows.  Host rock comprised mostly quartz and clay-sericite.  Predominant sulphide is pyrite.  Minor sulphide is sphalerite with rare minute inclusions of galena.  No arsenopyrite has been identified.

The Applicants most recent resource statement for the Mine, dated 30 June 2014, indicates that total resources are as follows.  Mt Boppy – 656 000t at 4.5g/t gold for 94 000 ounces of gold.  Mt Boppy South – 100 000t at 2.3g/t gold for 8 000 ounces of gold.

2.3 MODIFIED MINING OPERATIONS

The Proposed Modification includes continued mining within the extraction area approved under DA 2011/LD-00070. The final open cut would be developed to an elevation of approximately 160m AHD or approximately 120m below ground level.

Mining will continue to utilise conventional drill and blast, load and haul methods. Mining will involve the drilling and blasting of rock, followed by the loading of the fractured ore and waste into haul trucks. The primary blasting agent will be ANFO and non-electric detonation will be used to initiate the blast. Blasting frequency is expected to average two blasts per week with each blast recovering between 40 000t and 70 000t of waste rock or ore.

The following design criteria will generally be adopted.  Operational Face Height: ...... 5m.  Final Face Height: ...... 20m.  Operational Bench Width: ...... 20m.  Final Bench Width: ...... 5m.  Face Angle (weathered material): ...... ~55 to 65°.  Face Angle (unweathered material): ...... 70°.

These design criteria will be reviewed throughout operations to ensure that the open cut is developed to provide a safe and stable landform.

STATEMENT OF ENVIRONMENTAL EFFECTS BLACK OAK MINERALS LIMITED Report No. 569/05 Mt Boppy Gold Mine

In addition, to allow for the stockpiling of ore pending transportation to the Manuka Mine, the existing ROM Pad would be extended to the north (Figure 2.1).

2.4 WASTE ROCK MANAGEMENT

2.4.1 Introduction

RGS Environmental Pty Ltd undertook a detailed assessment of waste rock and tailings within the Mine Site. The resulting report, referred to hereafter as RGS (2015) is presented as Appendix 5. The scope of the assessment was as follows.  To review of existing geochemical, geological and water quality monitoring data.  To design, undertake and interpret a geochemical assessment program for representative waste rock and tailings materials.  Review the proposed management and monitoring strategies.

This subsection provides an overview of the results of that assessment.

2.4.2 Waste Rock Characterisation

2.4.2.1 Assessment Methodology

RGS (2015) implemented the following assessment methodology to determine the characteristics of waste rock within the Mine Site.  Detailed review of existing geochemical and geological information, including the following. – Analysis of 13 waste rock samples in 2011. – Analysis of static and kinetic (12 week) geochemical testing of four representative waste rock samples.  Analysis of a further 20 waste rock samples (and 4 tailings samples) collected for RGS (2015).

RGS (2015) undertook the following tests on samples collected.  All samples – static geochemical testing, including acid base accounting (total sulphur, acid neutralising capacity and net acid generation).  Six waste rock (and two tailings samples) – multi-element analysis.  Three composite waste rock samples representing fresh, partially oxidised and oxidised waste rock – Kinetic Leach Column tests.

BLACK OAK MINERALS LIMITED STATEMENT OF ENVIRONMENTAL EFFECTS Mt Boppy Gold Mine Report No. 569/05

2.4.2.2 Assessment Results

Assessment results are presented in detail in Section 5 of RGS (2015) and may be summarised as follows.

Acid Base Accounting Acid base accounting determines the net acid generation capacity or the amount of acid that could be produced by a sample and the acid neutralising capacity or the amount of acid that could be neutralised by a sample, to determine the net acid producing potential of each sample. The results of those tests indicated the following.  Fresh, unoxidised waste rock is typically classified as potentially acid forming.  Partially oxidised waste rock may be classified as either potentially acid forming or non-acid forming.  Oxidised waste rock is typically classified at non-acid forming.

Multi-Element Analysis and Enrichment Multi-element analysis determines the concentration of a wide range of elements in the waste rock, enabling these to be compared to the average crustal abundance concentrations.

The test results indicated that arsenic, copper, lead and zinc are enriched compared to average crustal abundance in some, but not all, waste rock samples. RGS (2015) note that this result is not unexpected given the mineralised nature of some of the waste rock.

Water Quality Static Leach Tests These tests mix very finely ground waste rock samples with deionised water and measure the resulting concentrations of dissolved metals and other contaminants. The results of those tests indicated the following.  pH – between 4.7 to 6.5, in line with the pH of the deionised water used for the test work, suggesting that the samples are unlikely to generate significant acidity during initial runoff and seepage.  Electrical conductivity – between 133µS/cm and 298µS/cm, indicating limited potential to release dissolved solids when in contact with water.  Dissolved metals – manganese, nickel and zinc were detected in some samples and all concentrations were less than the ANZECC (2000) trigger values for livestock watering.

STATEMENT OF ENVIRONMENTAL EFFECTS BLACK OAK MINERALS LIMITED Report No. 569/05 Mt Boppy Gold Mine

Water Quality Kinetic Leach Tests Three representative composite samples of oxidised, partially oxidised and fresh waste rock were subjected to kinetic leach tests where the samples were placed into sealed columns and were exposed to simulated conditions similar to those that would occur within the Project Site. Each column was then watered monthly and the collected water analysed. The tests are currently ongoing, with monthly watering and analysis to continue until June 2015.  pH – the leachate from the fresh and partially oxidised samples returned an average pH of approximately 3, while the leachate from the oxidised waste rock returned an average pH of 5, in line with the deionised water used for the test.  Electrical Conductivity – the fresh waste rock sample returned a relatively high result averaging 1 097µS/cm while the oxidised and partially oxidised samples returned an electrical conductivity of 212µS/cm and 480µS/cm respectively.  Dissolved metals – aluminium, cadmium and iron were detected at concentrations exceeding the ANZECC (2000) livestock watering trigger values in leachate from the partially oxidised and fresh waste rock samples, with copper, manganese and zinc exceeding those values in the leachate from the fresh waste rock sample.

Summary The waste rock characterisation test work determined that leachate from fresh and partially oxidised waste rock has the potential to have a low pH and elevated salinity and metal concentration, with leachate from oxidised waste rock likely to be of good quality.

2.4.3 Waste Classification and Volumes

RGS (2015) identified three classes of waste rock as follows.  “Increased risk” potentially acid forming waste rock, with a total sulphur concentration greater than 1%. The Applicant anticipates that approximately 8% of all waste rock, or approximately 136 000bcm, may be classified as “increased risk” potentially acid forming waste rock.  “Moderate risk” potentially acid forming waste rock, with a total sulphur concentration between 0.3% and 1% sulphur. The Applicant anticipates that approximately 8% of all waste rock, or approximately 254 500bcm, may be classified as “moderate risk” potentially acid forming waste rock.  Non-acid forming waste rock, with a total sulphur concentration less than 0.3% sulphur. The Applicant anticipates that approximately 1.2 million bcm of waste rock may be classified as non-acid forming.

BLACK OAK MINERALS LIMITED STATEMENT OF ENVIRONMENTAL EFFECTS Mt Boppy Gold Mine Report No. 569/05

2.4.4 Waste Rock Emplacement Design and Management

The Applicant proposes to place waste rock into three waste rock emplacements, namely:  Waste Rock Emplacement 1 (incorporating the existing Waste Rock Emplacement 2);  Waste Rock Emplacement 3; and  within Tailings Storage Facility 3.

The general design of the waste rock emplacements would be as follows.  Total area: ...... ~22.2ha.  Total volume ...... greater than 1.7 million bcm.  Maximum height: ...... 20m.  Lift height: ...... 10m.  Number of lifts: ...... 2.  Berm widths: ...... 5m.  Batter slopes: ...... 37° (upper), 18° (lower).

This Waste Rock Emplacement design would mimic a concave outer slope profile consistent with surrounding natural landforms. All areas that are to be used for emplacement of waste rock have been sterilised with respect to resource potential.

The Applicant notes that the total volume of waste rock to be mined during the approved Mine Life is expected to be approximately 1 670 000bcm. This material would be emplaced as follows.  “Increased risk” potentially acid forming waste rock – to be placed within the footprint of Tailings Storage Facility 3. It is noted that Tailings Storage Facility 3 was designed and approved to receive potentially acid forming tailings material and that the facility has been constructed with a liner suitable for that use.  “Moderate risk” potentially acid forming waste rock – to be placed within an encapsulation area. This area would have the following design criteria. – A minimum 3m thick basal layer of non-acid forming material to provide for drainage beneath the potentially acid forming material, limiting the potential for wetting and drying of that material. – “Moderate risk” potentially acid forming material would then be placed on top of the non-acid forming material to a depth of approximately 15m and lime added at a rate of 30t/ha as recommended by RGS (2015). – The limed potentially acid forming material would then be covered by a clay capping with a minimum depth of 900mm providing an impermeable layer with a maximum permeability of 1 x 10-9m/s.

STATEMENT OF ENVIRONMENTAL EFFECTS BLACK OAK MINERALS LIMITED Report No. 569/05 Mt Boppy Gold Mine

– The clay capping will then be covered using selected non-acid forming material to a depth of approximately 2m with an overlaying soil cover to provide a vegetated store and release layer.  Remaining non-acid forming waste rock would be used to encapsulate the potentially acid forming material and to complete construction of Waste Rock Emplacements 1 and 3.

2.5 PROCESSING RESIDUES AND TAILINGS

As no mineral processing is proposed to be undertaken at the Mine, no process residues or tailings would be generated. However, the existing TSF 3 would be utilised for the storage of ‘increased risk’ potentially acid forming material prior to capping with non-acid forming material. As Tailings Storage Facility 3 has been constructed for the management of potentially acid forming tailings material, the placement of ‘increased risk’ potentially acid forming waste rock within the existing facility would consolidate all ‘increased risk’ materials in one location.

2.6 WATER MANAGEMENT

2.6.1 Surface Water Management

Surface water management within the Mine would remain consistent with the approved surface water management methods, namely:  construction and maintenance of sedimentation ponds to capture and treat sediment laden runoff from the waste rock emplacement areas;  construction of clean water diversions to ensure clean water is diverted around areas of approved or proposed disturbance and dirty (or sediment laden) water from such areas is retained on site; and  use of any water captured within the open cut and tailings storage facility for dust suppression.

Given the high evaporation rates and low rainfall in the region it is not considered likely that discharges from the proposed and existing sediment basins would be required. However, in the event that these are necessary, water monitoring would be undertaken to ensure that water quality is within EPA discharge standards prior to any discharge occurring.

2.6.2 Mine Water Management

2.6.2.1 Volume of Water to be Removed

During the period from the cessation of mining operations in December 2005, the open cut has received groundwater inflows and incident rainfall, resulting in the open cut becoming partially water-filled. In addition, the failure of a surface water diversion in August 2013 resulted in temporary diversion of surface water into the open cut.

BLACK OAK MINERALS LIMITED STATEMENT OF ENVIRONMENTAL EFFECTS Mt Boppy Gold Mine Report No. 569/05

As a result, in August 2014 the water level within the open cut was approximately 242m AHD, with an estimated 370ML of water contained within the open cut. At the commencement of the current dewatering program, the water level had been reduced to approximately 238m AHD. On 10 February 2015, after two months of pumping, the water level within the open cut had been reduced to 234m AHD, with an estimated 145ML of water remaining within the open cut.

Water levels within the Northern and Southern Pits will need to be reduced to the current base of each open cut at 215m AHD and 209m AHD respectively to permit extraction of ore below the base of the open cuts

2.6.2.2 Mine Water Quality

Table 2.1 presents an overview of water quality within the existing Northern and Southern Pits. In summary, water within the open cut is suitable for stock watering, but is not suitable for discharge to aquatic ecosystems.

Table 2.1

Open Cut Water Quality

Parameter Units Northern Pit Southern Pit ANZECC Criteria 95% Species Livestock Protection pH - 7.66 to 8.45 7.64 to 7.87 6.0 to 8.5 Electrical µS/Cm 3 900 to 4 100 5 100 Conductivity Dissolved Solids mg/L 2 300 to 2 400 3 400 5 0001 Copper mg/L 0.00074 to 0.017 0.0020 to 0.0024 0.0014 1.0 to 5.0 Lead mg/L 0.00098 to 0.00010 to 0.0034 0.1 0.0019 0.00081 Zinc mg/L 0.020 to 0.054 0.015 to 0.12 0.008 20.0 Note 1: Criteria for no adverse effect on sheep Source: Acid Solutions (2014)

2.6.2.3 Use and Storage of Mine Water

Water removed from the open cut is used to irrigate sections of the Mine Site in accordance with the Irrigation Management Procedure for the Mt Boppy Gold Mine dated December 2014. That Plan identifies five irrigation areas as follows (Figure 1.2).  Area 1 – Existing Council Dams.  Area 2 – Tailings Storage Facility 3.  Area 3 – Open Cut and Processing Plant area.  Area 4 – Waste Rock Emplacement 3.  Area 5 – Waste Rock Emplacement 1.

STATEMENT OF ENVIRONMENTAL EFFECTS BLACK OAK MINERALS LIMITED Report No. 569/05 Mt Boppy Gold Mine

That Plan also requires the following.  The areas to be irrigated are assessed and modified to ensure that irrigated water does not enter surrounding watercourses and that evapotranspiration is maximised.  The irrigation system is constructed and inspected twice daily to ensure that no leakage occurs outside of the specified irrigation areas.  Water is applied such that the soil within the irrigation area is nearly saturated, without generating runoff or substantial seepage, with irrigation reduced or ceased if significant surface water runoff or ponding is observed.

Mine water is also used by:  the Applicant for dust suppression within the Mine Site, as required; and  Council and others from the existing Council Dams for surrounding roads.

In addition to the above, the Applicant proposes to construct two Temporary Mine Water Storage Dams within areas of previously approved disturbance (Figure 2.1). These storages would have a maximum capacity of approximately 145ML, namely, sufficient to store the remaining water within the Open Cut. The dams would be constructed progressively in cells, with each cell constructed and partially filled with mine water prior to construction of the next cell. This would allow the Applicant to construct only those cells required to store and manage mine water, reducing the potential for additional disturbance and capital expenditure that may not be required.

The proposed Temporary Mine Water Storage Dams would be constructed as follows.  The footprint of each cell would be surveyed and marked on the ground. Clean water diversions would then be constructed to ensure that surface water flows are diverted around the dams.  Vegetation and topsoil would then be removed as described in Section 2.4.2 of Polymetals (2011). Removed vegetation and stripped topsoil would be stockpiled in windrows to the west of each cell in a manner that would permit efficient respreading of the material over the reshaped landform.  Each cell would be excavated, with removed material used to construct the cell walls. Clay material extracted during cell construction operations would be stockpiled separately, if required and respread over the base and walls of the cell.  Respread clay material would be watered and compacted. Alternatively, in situ clay in the base and walls of the cell would be ripped, prior to being watered and compacted. This would minimise the potential for seepage from the cell during the limited operational life of the cell.  A stabilised emergency spillway would be constructed to ensure that in the unlikely case of a rainfall event that exceeds the freeboard capacity or a failure of the clean water diversion structures, that water may be discharged from the cells without adversely impacting on the cell embankment.

BLACK OAK MINERALS LIMITED STATEMENT OF ENVIRONMENTAL EFFECTS Mt Boppy Gold Mine Report No. 569/05

The proposed Temporary Mine Water Storage Dams would be progressively filled with mine water. A maximum filling level with a minimum freeboard of 300mm, or approximately double the 1 in 100 year-72 hour rainfall event, would be marked in all Temporary Mine Water Storage Dams. As the water level in these dams approaches the maximum fill level, pumping from the Open Cut would cease. In the event that water levels in the dams continue to rise to within 150mm of the spillway invert as a result of incident rainfall, pumping back to the Open Cut would commence to minimise the potential for discharge of mine water.

2.7 TRANSPORTATION

2.7.1 Mine Site Entrances and Access

Heavy vehicles accessing the Mine Site would do so via the existing Northern Access Road from the Gilgunnia-Canbelego Road (Figure 2.1).

Light vehicle access to the Mine would continue to be via the existing Light Vehicle Entrances.

2.7.2 Ore Transportation

2.7.2.1 Introduction

A key component of the Proposed Modification is the transportation of ore from the Mt Boppy Mine to the Manuka Mine. As described in Section 1.4.2, Development Consent 2006/LDA- 00015 permits transportation of ore from the Mine Site to the Peak Gold Mine, located 8km south of Cobar on the Kidman Way using 50t capacity double road trains. Similarly, as noted in Section 2.1.3, the transportation provisions included in DA 2006-LDA00015 are proposed to be incorporated into DA 2011/LD00070. As a result, this subsection describes the proposed modified transportation operations.

It is noted that the Applicant anticipates that DA 2011/LD00070, as modified, will cover ore transportation from the Mine Site to the intersection of the Kidman Way and the Peak Way and that the development consent for the Manuka Mine (2010/LD-00074) would cover transportation from that intersection to the Manuka Mine.

Finally, it is noted that on occasion, material such as oxidised waste rock or growth medium may be transported from the Manuka Mine to the Mt Boppy Mine for use during rehabilitation operations. This material would be transported as back loads under the same conditions as ore transportation and would not result in additional heavy vehicle movements.

2.7.2.2 Transportation Routes and Road Classification

Ore transportation would utilise the approved transportation route via the following (Figure 1.1).  Gilgunnia – Canbelego Road.  Barrier Highway.  Kidman Way to the intersection with the Peak Way.

STATEMENT OF ENVIRONMENTAL EFFECTS BLACK OAK MINERALS LIMITED Report No. 569/05 Mt Boppy Gold Mine

The Barrier Highway and Kidman Way are approved Type 1 A-Double Road Train routes. The Gilgunnia – Canbelego Road is within the general approval area for such vehicles.

2.7.2.3 Proposed Traffic Types and Levels

The Applicant notes that approval exists for transportation of ore using 50t capacity double road trains. Initially, the Applicant would transport ore using such vehicles. However, the Applicant proposes to transition to larger 60t capacity AB-triple road trains. Prior to using such vehicles, the Applicant would complete the following to the satisfaction of the Roads and Maritime Service and Cobar Shire Council.  Ensure that a Road Audit of the approved transportation route is completed and that the route is reclassified as suitable for AB-triple road trains.  Ensure that the required intersection upgrades are completed. Section 4.3.2 identifies the anticipated road upgrades that would be required.

The Applicant would undertake transportation of ore on a 24hr/day basis 7 days/week basis in accordance with the approved hours of operation under 2006/DA 2006-LDA00015. Transportation operations would initially use six dedicated road train sets (50t payloads) operated over two 12hr shifts per day. A return trip would require approximately 4.5hrs providing for a maximum of four trips per day per road train set. As a result, a maximum of 24 trips or 48 movements could be made per day, transporting approximately 1 200t ore/day).

In addition to road-trains transporting ore, a number of other approved light and heavy vehicle movements would occur, including:  up to approximately 20 light vehicle trips (40 movements) per day associated with site employees, contractors and visitors; and  up to two heavy vehicle trips (4 movements) per day associated with delivery of consumables (fuel, explosives etc.).

In total, a maximum of 26 heavy vehicle trips (52 movements) and 20 light vehicle trips (40 movements) are expected in any one day.

2.8 HOURS OF OPERATION AND MINE LIFE

2.8.1 Hours of Operation

Table 2.2 records the proposed hours of operation for all activities planned at the Mine.

BLACK OAK MINERALS LIMITED STATEMENT OF ENVIRONMENTAL EFFECTS Mt Boppy Gold Mine Report No. 569/05

Table 2.2

Proposed Hours of Operation

Activity Days and Times Soil stripping & vegetation clearing 7 days / week – 7.00am to 6.00pm Mining and earthmoving activities 7 days / week – 24hrs / day Transportation of ore 7 days / week – 24hrs / day On-site road grading 7 days / week – 7:00am to 6:00pm Equipment & other site maintenance 7 days / week – 24hrs / day

2.8.2 Mine Life

Based on the identified reserves remaining within the open cut, it is expected that operations at the Mine would last for approximately 2.5 years, with mining being completed within the initial 18 months. The remaining 12 month period would be required to complete transportation of ore from the Mine.

2.9 REHABILITATION

2.9.1 Introduction

The rehabilitation objectives and strategy for the Mine have been described in the Mining Operations Plan for the Mount Boppy Gold Mine (RWC, 2015). The following provides a brief overview of the proposed rehabilitation objectives, targets and procedures. The proposed final landform and land uses are displayed in Figure 2.2.

2.9.2 Rehabilitation Objectives

The objectives of rehabilitation activities and the targets for meeting these objectives are presented in Table 2.3.

Table 2.3

Rehabilitation Objectives and Targets Page 1 of 2 Feature Objective Target Land Use Provide native vegetation communities Rehabilitate Mine in accordance with suitable for intermittent and very low Figure 2.2. intensity grazing uses. Surface Decommission and remove all surface All surface infrastructure removed (unless Infrastructure infrastructure (unless required for a lawful required for a lawful post-mining land post-mining land use). use). Landform Provide a geotechnically stable landform. Geotechnical assessment based on site specific review determines that the retained slopes of the open cut are not likely to actively erode or ‘slip’ to an extent requiring further earthworks and profiling.

STATEMENT OF ENVIRONMENTAL EFFECTS BLACK OAK MINERALS LIMITED Report No. 569/05 Mt Boppy Gold Mine

Table 2.3 (Cont’d)

Rehabilitation Objectives and Targets Page 2 of 2 Feature Objective Target Landform Provide a non-polluting landform. Water quality monitoring results show the (Cont’d) landform is non-polluting within the meaning of Section 120 of the Protection of the Environment Operations Act 1997. In particular, ‘downstream’ water quality monitoring will record total suspended solids <50mg/L or within 10% of ‘upstream’ levels (whichever is the greater). Ensure the final open cut void is safe and Construct a safety bund around the open secure. cut void with appropriate signage. Biodiversity Revegetated areas provide a vegetation Rehabilitation monitoring confirms that the community with maintenance requirements established vegetation communities are no greater than adjoining vegetation / self-sustaining. analogue sites not disturbed by mining activities. Revegetated areas contain species Rehabilitation monitoring confirms the consistent with surrounding vegetation non-native and non-target species communities. (weeds) represent less than 10% of projected foliage cover or equivalent to surrounding vegetation / analogue sites not disturbed by mining activities. Other Allow for the relinquishment of the mining Within 10 years of final rehabilitation. tenements and the return of the security lodged over the Mining Lease within a reasonable time after the end of the mine life.

2.9.3 Final Landform and Land Uses

Land use on properties surrounding the Mine includes limited agricultural (very low intensity grazing) or nature conservation on vacant Crown Land. Final land uses considered for the Mine include the following. 1. Return to grazing. At present, the Mine Site is subject to minimal productive grazing uses due to exclusion fencing for part of the site, the previous disturbances and very poor quality of the existing pasture, reflecting the generally low quality of the soils and semi-arid climate. Nevertheless, reinstatement of vegetation types that are compatible with rural uses (notably saltbush) has previously been an aim of the project rehabilitation. However, due to the inherently poor condition of the country, grazing pressure would need to be maintained at very low levels once a suitable cover had been established, especially given current grazing pressures by kangaroos and feral goats (which are a regional land management issue).

BLACK OAK MINERALS LIMITED STATEMENT OF ENVIRONMENTAL EFFECTS Mt Boppy Gold Mine Report No. 569/05

Figure 2.2 Final Landform and Post-mining Land Use

A4/ Full Colour

Dated 12/3/15 inserted 19/3/15

STATEMENT OF ENVIRONMENTAL EFFECTS BLACK OAK MINERALS LIMITED Report No. 569/05 Mt Boppy Gold Mine

2. Conservation. While there are some areas of conservation significance to the west of the Mine, notably on the slopes of Mt Boppy proper, there are no areas within or in close proximity to the Mine that are considered suitable for conservation protection in their current condition. While rehabilitation measures will aim to re-establish a viable native ecosystem, the outcome is unlikely to be of significant conservation interest or value. 3. Other Land Use Options. Previous iterations of the Mt Boppy Mine (during the 1980s) have been considered for use as a waste disposal or other industrial development. However, the site is too isolated and services too poor to enable a viable concern to become established. The Mine was also considered for the purposes of radioactive waste disposal but this was not progressed following community feedback. The Mine has also been considered for use as a tourist attraction given it is an historical feature in the Cobar landscape. The isolation of the Mine and availability of other examples of mining in closer proximity to Cobar preclude this option.

Based on the above assessment, it is considered that establishment of site conditions that have native vegetation communities suitable for intermittent and very low intensity grazing uses is the preferred land use option. However, some areas are unlikely to be suitable for any form of grazing or vegetative rehabilitation e.g. the open cut.

2.9.4 Rehabilitation Procedures

A brief description of the activities required for the proposed final landform creation and rehabilitation activities is provided for each component area of the Mine as follows.

Tailings Storage Facility 3 The ‘increased risk’ potentially acid forming material will be placed over the tailings surface. Following reshaping, a clay liner will then compacted over the potentially acid forming material to a minimum depth of 0.9m and a permeability of 1 x 10-9m/s, or equivalent non-acid forming material will then be placed over the liner to create a minimum 2m thick store and release cover. The profiled surface will be free-draining with appropriate water management structures. If sufficient soil material is available, this will be spread to a depth of approximately 50mm across the flatter areas. Alternatively, weathered / clayey overburden material will be preferentially placed across the top of the non-acid forming material to provide a growth medium.

Waste Rock Emplacement The Waste Rock Emplacement will be constructed placement of non-acid forming material and profiling using a dozer in accordance with the landform design. The potentially acid forming encapsulation area will be similarly formed through paddock dumping of a base layer of non- acid forming material to a minimum thickness of 3m. The non-acid forming material will be

BLACK OAK MINERALS LIMITED STATEMENT OF ENVIRONMENTAL EFFECTS Mt Boppy Gold Mine Report No. 569/05 selected to provide good drainage beneath the Waste Rock Emplacement such that the potentially acid forming material is not subject wetting and drying cycles. Potentially acid forming material would then be built up in lifts to a total of approximately 15m thickness with non-acid forming material used to form the batters of the Waste Rock Emplacement.

The area of potentially acid forming encapsulation will then be limed, clay capped and covered with non-acid forming waste as per TSF 3. Similarly, if sufficient soil material is available, this will be spread to a depth of 50mm across the flatter areas. Alternatively, weathered / clayey overburden material will be preferentially placed across the top of the non-acid forming material to provide a growth medium. The areas will then be seeded with groundcover and shrub species.

Infrastructure Areas & ROM Pad For other general site areas including infrastructure areas and the ROM pad, all remaining materials and equipment will be removed from the site, any areas of contamination removed and any concrete footings or pads broken up and removed from site. These areas will then be profiled as required to provide a free-draining landform, deep ripped and, if soil material is available following rehabilitation of TSF 3 and the Waste Rock Emplacement, this will be spread to a depth of approximately 50mm. The areas will then be seeded with groundcover, shrub and tree species as identified in Table 17 of RWC (2015) or subsequent approved Mining Operations Plans.

Final Open Cut Void The principal rehabilitation to be undertaken for the final open cut void will be ensuring that an appropriate safety bund and signage is in place. The location of the bund will be such that it is established at a sufficient distance from the open cut crest that any potential wall failure will not intercept the bund.

The closure bund will typically be a minimum of 2m high with steep batters. However, where the haul road enters the open cut, the bund will be increased in height to further prevent stock or vehicular access. Appropriate warning signs will also be installed at regular intervals around the outside of the bund.

General Site and Revegetation In regard to grazing pressure management during the rehabilitation phase and the need to prevent access to rehabilitating areas by kangaroos and feral goats, the Applicant proposes the erection of a large herbivore exclusion fence around disturbance areas within the Mine to eliminate on-site feral goat populations from disturbed and rehabilitating areas. The fence will be a small hinge joint netting fence with additional salvage wires, resulting in a fence approximately 1 200mm high. This fence is low maintenance and will discourage kangaroo movement and stop re-population by feral goats, however, small mammal and reptile movement will not be impacted.

Rehabilitation trials and monitoring completed to date indicates that planting of tubestock at the Mine has only limited success. Therefore, revegetation will be undertaken by either direct or mechanical seeding. Seeding will be completed as soon as practicable after placement of soil material / growth medium and before the surface forms a crust so as to achieve an optimal surface microhabitat.

STATEMENT OF ENVIRONMENTAL EFFECTS BLACK OAK MINERALS LIMITED Report No. 569/05 Mt Boppy Gold Mine

Direct seeding lines for tree species will be spaced a minimum of 6m apart on flat areas and 8m on slopes to provide sufficient space for establishment and maintenance of groundcover species. Seeding rates will need to be high due to potential impact of grazing animals and will be approximately 1.5kg per kilometre.

2.9.5 Rehabilitation Implementation and Monitoring

Several rehabilitation trials have been undertaken at the Mine to test implementation of rehabilitation activities and potential for success of various rehabilitation strategies. These trial areas would continue to be monitored as operations continue, with results presented for each year in the AEMR.

Post-completion rehabilitation monitoring would focus upon determining whether progress towards achieving the relevant performance indicators, completion and relinquishment criteria presented in the Mining Operations Plan are being achieved. RWC (2015) provides the proposed rehabilitation monitoring methodology and frequency for each indicator and the associated criteria that would be used to guide success.

BLACK OAK MINERALS LIMITED STATEMENT OF ENVIRONMENTAL EFFECTS Mt Boppy Gold Mine Report No. 569/05

3. ENVIRONMENTAL SETTIN G

3.1 INTRODUCTION

The descriptions of various environmental aspects of the Proposed Modification throughout Section 4 are reliant upon a range of background information common to many of the key environmental issues. In this section, background information is provided on the topography, soil and land capability, climate and land use and ownership.

3.2 TOPOGRAPHY AND DRAINAGE

3.2.1 Regional Topography and Drainage

The Mine Site is situated in the western plains region of NSW where the regional topography is characterised by a gently undulating landform with low ridges and occasional locally prominent ridges and ranges (Figure 3.1). The most prominent topographical feature in the vicinity is Boppy Mountain, approximately 3.3km to the northwest of the Mine Site with an elevation of 406m AHD.

The Mine Site is located within the Barwon-Darling River catchment. The area surrounding the Mine Site is characterised by poorly defined ephemeral drainage lines that flow only immediately after rain and at times of heavy rainfall would drain to Mulga Creek approximately 9km to the east of the Mine Site or Yanda Creek approximately 13km to the southeast of the Mine Site. Both of these watercourses flow to the north.

3.2.2 Local Topography and Drainage

Pre-mining topography within the Mine Site is characterised by a number of low rises in the western section of the Mine Site, with maximum elevations between 290m AHD and 305m AHD (Figure 3.2). The lowest pre-mining point of the Mine Site is in the northeastern section of the Mine Site, with an elevation of approximately 275m AHD.

The topography within the Mine Site has, however, been influenced by previous mining operations, with the existing waste rock emplacement having an elevation of approximately 295m AHD or 20m above the natural surface and Tailings Storage Facility 3 having a maximum elevation of approximately 290m AHD, or 10m above the natural surface at that point. The deepest points of the Southern and Northern Pits are approximately 209m AHD or 215m AHD, or approximately 71m and 65m below the natural surface.

Drainage and runoff within the Mine Site is managed by a series of existing drainage lines and water storage dams that have been established to ensure that water storage capacity is suitable to manage a 1 in 100, 72-hour ARI event. An ephemeral creek flows generally south to north through the Mine Site. The creek has been realigned several times since 1900 around various mine components and currently flows west of Tailings Storage Facility 3 and the open cut and east of the existing waste rock emplacement.

STATEMENT OF ENVIRONMENTAL EFFECTS BLACK OAK MINERALS LIMITED Report No. 569/05 Mt Boppy Gold Mine

Figure 3.1 Regional Topography and Drainage A4/colour Dated 13/3/15 inserted 19/3/15

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Figure 3.2 Local Topography, Drainage, Land Use and Vegetation A4/colour Dated 19/3/15 inserted 19/3/15

STATEMENT OF ENVIRONMENTAL EFFECTS BLACK OAK MINERALS LIMITED Report No. 569/05 Mt Boppy Gold Mine

3.3 SOIL AND LAND CAPABILITY

The soils of the surrounding Canbelego area is characterised by Silurian and Siluro-Devonian siltstone and sandstone and surface residual and colluvial gravel and quartz. Where present, topsoils are skeletal and subject to sheet erosion.

The majority of the Mine Site has been heavily disturbed by previous mining activity, limiting potential land use. A soils assessment of the Mine was previously completed by SEEC (2011). In summary, the soils were described as being relatively consistent across the Mine Site, although depth increased slightly towards the south. The soil profile consists of approximately 400mm to 1 200mm of gravelly lithosols with high sand content. The soil was also considered to be non-sodic but with a low organic content.

The soils are highly erodible but are relatively coarse grained, meaning flocculation within sediment basins will not be required. Although the soils are erodible, the low slope gradients and low rainfall erosivity mean the soil loss class is ‘Very Low’.

Based on the dry and irregular climate and poor soils, it is considered that the Land and Soil Capability class within and surrounding the Mine Site is generally Class 6 in accordance with the classification presented in The land and soil capability assessment scheme: Second approximation (OEH, 2012). Class 6 land is defined as follows.

Low capability land: Land has very high limitations for high-impact land uses. Land use restricted to low-impact land uses such as grazing, forestry and nature conservation. Careful management of limitations is required to prevent severe land and environmental degradation.

3.4 CLIMATE

3.4.1 Introduction

Climatic conditions have the potential to influence a range of Mine-related impacts at surrounding residences and on the local environment. The climate in the vicinity of the Mine may be classified under the Köppen climate classification as a “warm semi-arid climate”, i.e. hot, dry summers and relatively cool dry winters, with the rainfall pattern having a summer maximum.

This subsection provides a brief overview of the climatic conditions surrounding the Mine, focusing particularly on those aspects of the climate that are likely to influence the potential Mine-related environmental impacts.

3.4.2 Data Sources

Meteorological data from the following Bureau of Meteorology (BOM) stations is presented in Table 3.1. Long term climate data was sourced from the following locations as they provided the largest and most complete datasets within the local area.  Cobar MO Weather Station (Station Number 048027), located approximately 45km west of the Mine Site (temperature, humidity and wind).

BLACK OAK MINERALS LIMITED STATEMENT OF ENVIRONMENTAL EFFECTS Mt Boppy Gold Mine Report No. 569/05

 Girilambone (Booroomugga) Station (Station Number 048011), located approximately 30km to the northeast of the Mine Site (rainfall).  Evaporation data was sourced from the Bureau of Meteorology’s Average Pan Evaporation Map.

3.4.3 Temperature and Humidity

Table 3.1 indicates that January is the hottest month, with a mean maximum temperature of 34.2°C and a mean minimum temperature of 20.6°C. July is the coldest month with a mean maximum temperature of 15.9°C and a mean minimum temperature of 5.0°C. Late autumn, winter and early spring (April to September) is typically the most humid times of the year.

Table 3.1

Monthly Meteorological Data

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann Temperature (ºC) 1 (1962 to 2014) Mean Maximum 34.2 33.2 30.0 25.2 20.1 16.5 15.9 18.0 22.1 26.1 29.6 32.5 25.3 Mean Minimum 20.6 20.1 17.1 12.9 9.0 6.2 5.0 6.2 9.1 12.7 16.0 18.7 12.8 Relative Humidity (%)1 (9am – 1910 / 3pm – 1962 to 2010) 9:00am 44 50 51 56 69 79 75 66 54 46 44 40 56 3:00pm 27 30 31 35 45 51 48 40 33 29 27 23 35 Rainfall (mm) 2(1881 to 2015) Mean rainfall 41.0 44.8 38.8 25.5 31.1 36.0 25.3 26.4 26.5 30.9 34.5 43.4 404.2 Highest daily rainfall 136.4 116.1 71.9 54.4 66.3 69.6 54.6 72.5 50.0 70.9 86.9 147.3 - Evaporation (mm) 3(1975 – 2005) Average evaporation 300 250 200 125 80 50 60 80 125 175 300 300 2 045 Source: Note 1: Cobar MO Weather Station (Station Number 048027) Note 2: Girilambone (Booroomugga) Station (Station Number 048011) Note 3: Bureau of Meteorology – Average Pan Evaporation Maps. (http://www.bom.gov.au/jsp/ncc/climate_averages/evaporation/index.jsp)

3.4.4 Rainfall

Monthly mean rainfall varies between 25.3mm and 44.8mm, with more rainfall in summer than winter. Rainfall variability is greatest in the warmer months of December to February. In general, monthly rainfall can be highly variable, with all months recording no rainfall in some years. Similarly, maximum daily rainfall has been recorded to be between two and four times the mean monthly rainfall, particularly in summer and early autumn, indicating that heavy storms can occur.

Mean monthly evaporation varies throughout the year, from approximately 300mm in November, December and January to approximately 50mm in June. Mean monthly evaporation exceeds rainfall in all months and annual evaporation exceeds annual rainfall by a factor of four, indicating that the area is typically in water deficit.

STATEMENT OF ENVIRONMENTAL EFFECTS BLACK OAK MINERALS LIMITED Report No. 569/05 Mt Boppy Gold Mine

3.4.5 Winds

Wind roses, indicating wind speed and direction, have been sourced from the BOM-operated Cobar MO Weather Station (station number 048027) and are presented in Figure 3.3. The data is based on records from 1962 until 2010 and indicate that prevailing winds throughout the year are from the west though display distinct seasonal patterns. During the summer and autumn westerly and southwesterly winds feature strongly while winds during winter and spring feature from most directions. During winter, calms have been recorded for approximately 20 percent of records indicating fewer winds during this time compared to other seasons were calms only feature for 10 to 13 percent of records.

3.5 LAND USE AND LAND OWNERSHIP

3.5.1 Land Uses

The land within the Mine Site has a long history of mining uses. The region surrounding the Mine is unsuitable for permanent cropping activity due to the poor quality of the soils combined with the low and unreliable rainfall patterns. No pastoral or other agricultural activities are located adjacent to the Mine Site. Land uses within the Canbelego region comprise mainly pastoral activities on native and low quality improved pasture with some areas of intact native vegetation, notably the vegetation communities associated with Mt Boppy proper and the Canbelego State Forest located to the north of the Barrier Highway.

3.5.2 Land Ownership

Land ownership within and surrounding the Mine Site and the location of existing residences are displayed in Figure 3.4. The majority of the land within the Mine Site (corresponding to the mining tenements) is Crown Land. Small sections of GL 5848 and GL 5898 also overlap allotments in the residential area of the Canbelego Township. Advice from the Cobar Shire Council is that these allotments are not valued or rated by the Council and thus it was suggested that they are vacant Crown Land.

The majority of other areas within the Canbelego Township are either Crown Land, owned by Cobar Shire Council or freehold land owned by the Company. A small number of freehold land parcels are privately owned. Three non-Applicant owned residences occur in the vicinity of the Mine Site.

BLACK OAK MINERALS LIMITED STATEMENT OF ENVIRONMENTAL EFFECTS Mt Boppy Gold Mine Report No. 569/05

Figure 3.3 Wind Roses A4/colour Dated 13/3/15 inserted 19/3/15

STATEMENT OF ENVIRONMENTAL EFFECTS BLACK OAK MINERALS LIMITED Report No. 569/05 Mt Boppy Gold Mine

Figure 3.4 Land Ownership and Residential Receivers

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4. ASSESSMENT AND MANAG EMENT OF KEY ENVIRONMENTAL ISSUES

4.1 INTRODUCTION

This section provides an overview of the key environmental issues associated with the Proposed Modification, as well as the proposed management measures that would be implemented for each and an assessment of the anticipated additional residual impacts, taking into account the proposed management measures. A risk-based approach has been taken, with detailed information provided in relation to those issues considered to be of greatest risk. For those issues considered to be of lower environmental risk, a simple tabulated assessment has been provided.

4.2 ACID FORMING MATERIAL

4.2.1 Introduction

RGS (2015) presents a detailed assessment of the waste rock within the Mine Site, with Section 2.4 presenting an overview of that work. In summary, RGS (2015) determined that:  approximately 8% or 136 000t of waste rock may be classified as “high risk” potentially acid forming material with a total sulphur concentration of greater than 1%;  approximately 14% or 254 500t of waste rock may be classified as “moderate risk” potentially acid forming material with a total sulphur concentration of between 0.3% and 1%; and  the remaining waste rock may be classified as non-acid forming.

4.2.2 Operational Controls and Management Measures

As identified in Section 2.4.4, the Applicant proposes to place each of the above classes of waste rock into the following locations.  “Increased risk” potentially acid forming waste rock – to be placed within the footprint of Tailings Storage Facility 3. It is noted that Tailings Storage Facility 3 was designed and approved to receive potentially acid forming tailings material and that the facility has been constructed with a liner suitable for that use.  “Moderate risk” potentially acid forming waste rock – to be placed within an encapsulation area. This area would have the following design criteria. – A minimum 3m thick basal layer of non-acid forming material to provide for drainage beneath the potentially acid forming material, limiting the potential for wetting and drying of that material. – “Moderate risk” potentially acid forming material would then be placed on top of the non-acid forming material to a depth of approximately 15m and lime added at a rate of 30t/ha as recommended by RGS (2015).

STATEMENT OF ENVIRONMENTAL EFFECTS BLACK OAK MINERALS LIMITED Report No. 569/05 Mt Boppy Gold Mine

– The limed potentially acid forming material would then be covered by a clay capping with a minimum depth of 900mm providing an impermeable layer with a maximum permeability of 1 x 10-9m/s. – The clay capping will then be covered using selected non-acid forming material to a depth of approximately 2m with an overlaying soil cover to provide a vegetated store and release layer.  Remaining non-acid forming material would be used to encapsulate the potentially acid forming material and to complete construction of Waste Rock Emplacements 1 and 3.

In addition, the Applicant would implement the following additional operational controls and management measures.  Ensure that all waste rock is sampled and characterised prior to being extracted and that each class of waste rock is transported to the appropriate emplacement location.  Inspect the “increased risk” and “moderate risk” potentially acid forming material emplacement areas for visual signs of oxidisation of sulphides or generation of low pH leachate.  Ensure that surface water from the “increased risk” and “moderate risk” potentially acid forming material emplacement areas is captured and is not permitted to discharge from the Mine Site.  Monitor the quality of leachate from the “increased risk” and “moderate risk” potentially acid forming material emplacement areas to detect if low pH leachate is being generated.  Ensure that that the “increased risk” potentially acid forming material emplacement areas is covered with a clay liner with a permeability of 1 x 10-9 over 900mm or equivalent and that the liner is then covered with a minimum of 2m of non-acid forming waste rock.  Ensure that that the “moderate risk” potentially acid forming material emplacement areas is constructed on at least 3m of non-acid forming waste rock and is covered by a minimum of 2m of such material.

4.2.3 Assessment of Impacts

Given the limited volume of “high risk” potentially acid forming waste rock and the proposed operational controls and management measures, the residual risk of discharge of low pH leachate from the Mine Site during the operational or rehabilitation phase of the Mine is low. In addition, the Applicant proposes a range monitoring measures that would ensure that any low pH leachate that was generated would be detected during the life of the Mine, enabling appropriate management measures to be implemented.

BLACK OAK MINERALS LIMITED STATEMENT OF ENVIRONMENTAL EFFECTS Mt Boppy Gold Mine Report No. 569/05

4.3 TRAFFIC AND TRANSPORTATION

4.3.1 Introduction

As described in Section 2.7.2, the Proposed Modification seeks:  to incorporate transportation of ore from the Mine Site to the intersection of the Kidman Way and the Peak Way using A-double road trains approved under DA 2006/ LDA00015 into DA 2011/LD00070;  approval to permit transportation of this material using AB-triple road trains once a Road Audit and associated road/intersection upgrades have been completed.

The Applicant will make a separate application to modify the approval for the Manuka Mine to approve transportation of ore from intersection of the Kidman Way and the Peak Way to the Manuka Mine.

Constructive Solutions Pty Ltd was commissioned to undertake an assessment of the potential traffic-related impacts of the Proposed Modification. A Traffic Impact Assessment Report was prepared in accordance with the Guide to Traffic Generating Developments (RTA, 2002). The resulting report is presented in Appendix 6 and is hereafter referred to as CS (2015). The following subsections provide an overview of the existing road network, key intersections and proposed traffic levels as well as the assessment of impact that the proposed haulage traffic would have on road service and condition along the approved transportation route.

4.3.2 Existing Environment

The Barrier Highway and Kidman Way are approved Type 1 A-Double Road Train routes. The Gilgunnia – Canbelego Road is within the general approval area for such vehicles. As the approved transport route is approved for use by A-double road trains, the Applicant contends that the route has previously been determined to be suitable for use by such vehicles.

CS (2015) assessed the following intersections for use by 60t capacity AB-triple road trains. It is noted that the Applicant would initially use 50t capacity A-double road trains until the commitments identified in Section 2.7.2.3 are implemented.

STATEMENT OF ENVIRONMENTAL EFFECTS BLACK OAK MINERALS LIMITED Report No. 569/05 Mt Boppy Gold Mine

The results of that assessment are presented in Sections 4 and 6 and Figures 1 and 2 of CS (2015). The following presents a brief summary of the results of that assessment.  Intersection of Barrier Highway and Gilgunnia-Canbelego Road. The signposted speed limit on the Barrier Highway in the vicinity of the intersection is 110km/h and the sight distances are approximately 300m to the east and greater than 500m to the west. CS (2015) determined that the swept path for AB-triple road trains would require widening of the shoulder for left-turning vehicles coming out of the Gilgunnia-Canbelego Road. In addition, the AUSTROADS warrants for the intersection indicate that a BAR/BAL treatment of the Barrier Highway would be required.  Intersection of Barrier Highway and Kidman Way. The signposted speed limit on the Barrier Highway and Kidman Way in the vicinity of the intersection is 50km/h and the sight distances are approximately 400m to the east and greater than 250m to the west. CS (2015) determined that the swept path for AB-triple road trains would require widening of the shoulder for left-turning vehicles coming out of the Barrier Highway. In addition, the AUSTROADS warrants for the intersection indicate that a BAR/BAL treatment of the Barrier Highway would be required for peak vehicle volumes of more than 50 vehicles per hour..

4.3.3 Traffic Levels

Existing traffic levels (provided in Table 4.1) were sourced from the Cobar Shire Council from surveys undertaken in 2013. CS (2015) assumed a two percent annual increase in traffic levels to over the three years of operations to 2017 to forecast traffic volumes throughout mining and transport operations. No existing traffic volume data is available for the Gilgunnia-Canbelego Road. Based on site observations, CS (2015) assumed a volume of less than 50 vehicles per day.

Table 4.1

Existing and Forecast Daily Traffic Volumes (vehicles per day) Existing Traffic (2013) Forecast Traffic (to 2017) Light Heavy Light Heavy Total Total Road Location Vehicles Vehicles Vehicles Vehicles Barrier Highway 3km east of Cobar 500 209 709 542 226 768 Kidman Way 10km south of Cobar 611 240 851 661 260 921

Source: CS (2015)

4.3.4 Intersection performance

CS (2015) undertook SIDRA analysis of each of the intersection on the approved transportation route and determined, based on forecast 2017 traffic levels and expected peak Mine-related traffic levels, that both intersections would retain a Level of Service A or “good operation” or B “acceptable delays and spare capacity).

BLACK OAK MINERALS LIMITED STATEMENT OF ENVIRONMENTAL EFFECTS Mt Boppy Gold Mine Report No. 569/05

4.3.5 Operational Controls and Management Measures

The Applicant would implement the following traffic and transport-related operational controls and management measures.  Ensure that all heavy vehicles transporting ore well maintained and regularly inspected.  Ensure that all loads are covered prior to leaving the Mine site and at all times while on the public road network.  Develop and implement a Driver’s Code of Conduct, for all heavy vehicle operators identifying the requirement for safe and courteous driving practices and a procedure for identifying and disciplining operators who do not comply with the requirements of the Code.

4.3.6 Assessment of Impacts

The Applicant contends that transportation of ore from the Mine Site to the intersection of the Kidman Way and the Peak Way using 50t-capacity A-double road trains would be consistent with the approved transportation operations and, as a result, there would be no additional impacts compared to the approved operation of the Mine.

In addition, the Applicant contends that its commitment to ensure the completion of the proposed Road Audit and resulting upgrades prior to transportation using 60t-capacity AB- triple road trains would ensure that the road network is adequate for such vehicles and that there would be no significant residual additional impacts.

4.4 NOISE

4.4.1 Introduction

A Noise Impact Assessment for the Proposed Modification was undertaken by SLR Consulting Pty Ltd (SLR). The full assessment is presented as Appendix 7 and is referred to hereafter as SLR (2015a). This subsection provides an overview of that assessment.

4.4.2 Existing Environment

The noise climate around the Mine is influenced by typical rural activities such as livestock and local traffic, together with noise associated with wind in the trees, insects and birds. Distant traffic on the Barrier Highway would also contribute to the local noise climate. Given that operations are no longer occurring at the Mine (while on care and maintenance), there are no existing noise generating activities occurring within the Mine Site. The Mine is the only industrial noise source in the vicinity.

Figure 3.4 presents the surrounding residential receivers. Residences R3, R4 and R7 are the only privately-owned, habitable residences in the vicinity of the Mine Site and the Applicant has a pre-existing agreement in place with the occupiers of each regarding noise conditions.

STATEMENT OF ENVIRONMENTAL EFFECTS BLACK OAK MINERALS LIMITED Report No. 569/05 Mt Boppy Gold Mine

For the purposes of the assessment, and in the absence of site-specific noise monitoring data, SLR (2015a) have assumed the default reference background level of 30dB(A) as specified in the Industrial Noise Policy (INP).

4.4.3 Assessment Criteria

The following presents the assessment criteria identified by SLR (2015a) for the noise assessment.  Operational noise.

– Intrusive Criteria – 35dB(A) Leq(15min) during the day (7:00am to 6:00pm), evening (6:00pm to 10:00pm) and night (10:00pm to 7:00am).

– Sleep disturbance criteria – 45dB(A)LA(1 minute).  Road noise criteria.

– Daytime (7:00am to 10:00pm) LAeq (period) – 60dB(A).

– Night-time (10:00pm to 7:00am) LAeq (period) – 55dB(A).

– A relative increase criteria of existing LAeq (period) plus 12dB(A).

4.4.4 Operational Noise Assessment Results

4.4.4.1 Assessment Methodology

Section 6 of SLR (2015a) presents the noise assessment methodology. In summary, the nose assessment was undertaken in accordance with assessment guidelines provided in the INP. Four climatic scenarios and three operational scenarios were assessed as follows.  Climatic scenarios. – Daytime – Calm, 25ºC, no wind. – Evening/night-time – Calm, 2ºC, no wind, no temperature inversion. – Night-time – Calm, 2ºC, no wind, Class F temperature inversion (3ºC/100m). – Night-time – Calm, 2ºC, no wind, Class G temperature inversion (8ºC/100m).  Operational scenarios – each of the following operational scenarios are presented on Figures 4.1 to 4.3. – Scenario 1 – Pre-stripping. – Scenario 2 – Operational Mining (6 to 18 months). – Scenario 3 – Ore Transportation (18 to 36 months).

BLACK OAK MINERALS LIMITED STATEMENT OF ENVIRONMENTAL EFFECTS Mt Boppy Gold Mine Report No. 569/05

Figure 4.1 Noise Scenario 1 – Pre-stripping

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Figure 4.2 Noise Scenario 2 – Operational Mining (6 to 18 months)

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Figure 4.3 Noise Scenario 3 – Ore Transportation (18 to 24 months)

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4.4.4.2 Assessment Results

Operational Noise Assessment The predicted operational noise levels for each scenario under the assessed meteorological conditions are provided in Table 4.2 for non-project related residential receivers (Figure 3.4). Although included in the assessment, the results at residences and vacant lands that are owned by the Applicant are not discussed further as noise criteria would not apply at those locations.

Table 4.2

Predicted Operational Noise Levels

Receiver Predicted intrusive noise level Leq(15minute) (dB(A)) Daytime Evening/Night- Night F-Class Night G-Class Calm time Calm Inversion Inversion Project Specific 35 35 35 35 Noise Levels Scenario 1 – Pre-Stripping Activities (0 to 6 months) R3 42 43 47 52 R4 42 43 46 52 R7 36 38 43 48 Scenario 2 – Operation Mining (6 to 18 months) R3 42 43 46 50 R4 40 42 45 50 R7 38 40 44 48 Scenario 3 – Ore Transport (18 to 36 months) R3 36 37 39 43 R4 33 34 36 41 R7 31 32 37 42 Source: SLR (2015a) – Tables 13, 14 and 15

The results indicate the following.  Predicted noise levels are likely to exceed the project-specific noise criteria except during the final stage of development where operations consist of mineral ore transportation only.  For each scenario, all privately-owned residences would exceed the voluntary land acquisition criteria, specified in Condition G3.1 of EPL 20192, under temperature inversion conditions.

Sleep Disturbance Noise Assessment Table 4.3 provides the maximum predicted night time operational noise levels (equivalent to an average over one minute) for Scenario 1 and Scenario 2 under night time meteorological conditions.

The results indicate that the predicted maximum noise levels would exceed the sleep disturbance criteria at each residence under temperature inversion conditions.

BLACK OAK MINERALS LIMITED STATEMENT OF ENVIRONMENTAL EFFECTS Mt Boppy Gold Mine Report No. 569/05

Table 4.3

Predicted Maximum Night Time Operational Noise Levels

Receiver Predicted intrusive noise level Leq(1minute) (dB(A)) Night F-Class Night G-Class Inversion Inversion Project Specific 45 45 Noise Levels Scenario 1 – Pre-Stripping (0 to 6 months) R3 50 54 R4 50 56 R7 46 50 Scenario 2 – Operational Mining (6 to 18 months) R3 55 58 R4 53 57 R7 51 56 Source: SLR (2015b) – Table 16

Comparison with Previous Intrusive Noise Assessments SLR (2015a) compared the results of the assessment completed above with the results of the Noise Impact Assessment completed in 2012 (SLR, 2012). The results of this comparison are provided in Table 4.4.

Table 4.4

Comparison of 2012 and Current Predicted Noise Levels

Period Range of predicted intrusive noise level LAeq(15minute) – All Scenarios (dB(A)) Previously Approved (2012) Proposed Modification Daytime Calm 44-45 31-42 Evening/Night-time Calm 38-44 32-43 Night G-Class Inversion 45-55 41-52 Source: SLR (2015a) – Table 17

These results indicate that the predicted noise levels are generally consistent with or less than those predicted in SLR (2012) and approved under DA 2011/LD-00070.

4.4.5 Negotiated Agreements with Surrounding Residents

Negotiated agreements have been signed by the following residents to allow for predicted and potential exceedances of noise criteria established in the INP and air quality (dust) guidelines issued by the OEH as a result of mining operations.  Ms Regina Peacy.  Mr Brent Winner.

STATEMENT OF ENVIRONMENTAL EFFECTS BLACK OAK MINERALS LIMITED Report No. 569/05 Mt Boppy Gold Mine

A verbal agreement exists between the Applicant and Mr Ben Walkington and Ms Joyce Walkington who have indicated that they are aware of the potential impacts, satisfied that the Mine should proceed, and do not wish to sign a negotiated agreement.

4.4.6 Road Traffic Noise Assessment

4.4.6.1 Assessment Methodology

SLR (2015a) completed a qualitative assessment of road traffic noise resulting from the Proposed Modification in accordance with the NSW Road Noise Policy. Predictions were made using the Federal Highway Administration Model. The addition to the data input for assessment of operational noise impacts the following inputs were included in modelling of road noise.  Annual average daily traffic levels for the Barrier Highway and Kidman Way, sourced from the Cobar Shire Council.  Daily traffic movements proposed under the Proposed Modification (see Section 2.7).  A nominal distance from the road of 10m and height from external ground level of 1.5m.

4.4.6.2 Assessment Results

Table 4.5 provides predicted road traffic noise levels determined by SLR (2015a).

Table 4.5

Predicted Road Traffic Noise Levels

Criteria Predicted Noise Level (dB(A) Road Period (LAeq(period)) LAeq(period)) Existing Proposed Total Barrier Daytime (0700 to 2200) 60 53 44 53 Highway Night- time (2200 to 0700) 60 53 47 54 Daytime (0700 to 2200) 55 53 44 54 Kidman Way Night -time (2200 to 0700) 55 53 47 54 Source: SLR (2015b) – Table 22

These results indicate that the road traffic noise levels are predicted to comply with the criteria established in the NSW Road Noise Policy during both daytime and night-time periods.

BLACK OAK MINERALS LIMITED STATEMENT OF ENVIRONMENTAL EFFECTS Mt Boppy Gold Mine Report No. 569/05

4.4.7 Controls and Operational Safeguards

Existing operational control measures that have been implemented to manage noise generated by the Mine would be continued under the Proposed Modification. These would include the following.  Prepare a Noise Management Plan, incorporating a Noise Monitoring Program, to guide management and responses to excessive noise emissions or substantiated complaints.  Maintain and operate all equipment in accordance with the manufacturer’s specifications.  Undertake regular communication and consultation with surrounding residents, including providing clear signage at the Mine that provides appropriate phone numbers. Ensure that feedback or complaints in relation to noise are promptly addressed.

4.4.8 Assessment of Impacts

The implementation of controls and operational safeguards described in Section 4.5.6, including development of a noise management plan, would limit noise emissions to the extent as practically possible. SLR (2015a) predicted that operational noise levels would exceed relevant criteria for both the project-specific noise criteria and sleep disturbance criteria at privately- owned residential receptors. However, these noise levels are consistent with or less than previously predicted and approved noise levels and all privately-owned residences are subject to existing confidential agreements concerning noise emitted from the Mine. As a result it may be concluded that the Proposed Modification would not result in unacceptable operational noise.

All road noise levels predicted by SLR (2015a) for Mine-related transportation were compliant with the NSW Road Noise Policy criteria during all periods of operation at a nominal distance of 10m from the Barrier Highway and the Kidman Way.

4.5 AIR QUALITY

4.5.1 Introduction

An Air Quality Impact Assessment for the Proposed Modification was undertaken by SLR Consulting Pty Ltd (SLR). The full assessment is presented as Appendix 8 and is referred to hereafter as SLR (2015b). This subsection provides an overview of that assessment.

STATEMENT OF ENVIRONMENTAL EFFECTS BLACK OAK MINERALS LIMITED Report No. 569/05 Mt Boppy Gold Mine

4.5.2 Existing Environment

The following pollutant emission sources may contribute to background particulate matter emissions in the vicinity of the Mine and are consistent with the rural nature of the surrounding landscape.  Dust stirred up by vehicle movements along unsealed and sealed public roads.  Diesel emissions from vehicle movements along public roads.  Wind generated dust from exposed areas within the surrounding landscape.  Dust and diesel emissions from agricultural activities at neighbouring properties.  Seasonal emissions from household wood burning fires.  Episodic emissions from dust storms and vegetation (e.g. bush and grass) fires.

For the purposes of the assessment, SLR (2015b) adopted background air quality levels based on the following sources.

 PM10 – Monitoring data sourced from the EPA’s New England District air quality monitoring station located at Tamworth.  Total suspended particulates (TSP) – A conservative assumption of the ratio of TSP to PM10 as 3:1.  Deposited Dust – Dust deposition monitoring undertaken during previous operations and for previous air quality assessments at the Mine.

SLR (2015b) notes that during days when dispersion modelling predicts a low incremental impact for Mine-related activities, the cumulative levels may nonetheless exceed approved levels due to background conditions such as regional dust or smoke events. SLR (2015b) reviewed the PM10 monitored data used to establish the background levels for this pollutant and identified 17 events where regional conditions resulted in exceedingly high levels of particulates. These events were removed from any further analyses.

The adopted background air quality levels are provided in Table 4.6.

Table 4.6

Background Air Quality at the Mine Estimated Background Pollutant Averaging Period Level

Total Suspended 3 Annual 51 µg/m Particulate Matter 24-Hour Daily varying PM10 Annual 17 µg/m3 24-Hour None assumed PM2.5 Annual None assumed Dust Deposition Annual 2 g/m2/month Source: SLR (2015b) – Table 23

BLACK OAK MINERALS LIMITED STATEMENT OF ENVIRONMENTAL EFFECTS Mt Boppy Gold Mine Report No. 569/05

4.5.3 Assessment Criteria SLR (2015b) reviewed the NSW EPA air quality impact assessment criteria, as specified in the “Approved Methods for the Modelling and Assessment of Air Pollutants in NSW” (DEC 2005) and the National Environment Protection (Ambient Air Quality) Measure (NEPM, 1998) to establish air quality goals for the Mine (see Table 4.7.)

Table 4.7

Air Quality Assessment Goals

Averaging Pollutant Goal Time TSP Annual 90 µg/m3 24 hours 50 µg/m3 PM10 Annual 30 µg/m3 24 hours 25 µg/m3 PM2.5 Annual 8 µg/m3 Maximum incremental (Mine only) increase of 2 g/m2/month Dust Deposition Annual Maximum Total of 4 g/m2/month (Mine and other sources) Source: SLR (2015b) – Table 9

4.5.4 Assessment Methodology SLR (2015b) modelled the air quality conditions at the Mine using the US EPA’s CALPUFF (Version 6.267) modelling system and applied the following inputs to establish a model to predict anticipated dust levels at surrounding privately-owned residential receptors.  Operational emissions sources – based on the previous and proposed operations activities and including: – wheel generated dust; – wind erosion from disturbed areas; – material handling; – grader operations; – drilling and blasting operations; and – other possible transfers and conveying.  An emissions inventory – calculated using default or calculated emission factors for specific emission sources.  Meteorological modelling – using The Air Pollution Model (TAPM, v 4.0.4).  Baseline air quality – described in Section 4.5.2 and excluding exceedances identified as regional exceedance events. Further detail on the inputs and a rationale for the approach taken to modelling is provided in SLR (2015b).

STATEMENT OF ENVIRONMENTAL EFFECTS BLACK OAK MINERALS LIMITED Report No. 569/05 Mt Boppy Gold Mine

4.5.5 Assessment Results

The results of emission dispersion modelling are provided in Table 4.8.

The results indicate that the adopted maximum 24-hour average PM10 air quality goals would be expected to be exceeded at Residence R4. Further consideration of the modelling results indicated that additional exceedances could be expected but that in each case background conditions were the most significant contribution to the PM10 levels predicted. A further consideration of background conditions during these events determined that the direction and intensity of wind was the most significant factor in producing background conditions, that when combined with contributions from the Mine, would exceed air quality goals.

Table 4.8

Modelled Particulate Matter Levels at the Mine

Pollutant Criteria Background Increment Cumulative Total Suspended Particulate Matter (µg/m3) R3 51.0 15.0 66.0 90 µg/m3 R4 51.0 13.6 64.6

R7 51.0 9.0 60.0 3 Maximum 24-Hour Average PM10 (µg/m ) R3 13.8 30.8 44.6 50 µg/m3 R4 36.3 33.5 69.8

R7 18.3 25.9 44.2 3 Annual Average PM10 (µg/m ) R3 17.0 5.6 22.6 30 µg/m3 R4 17.0 5.1 22.1

R7 17.0 3.5 20.5 3 Maximum 24-Hour Average PM2.5 (µg/m ) R3 N/A 3.2 N/A R4 25 µg/m3 N/A 3.6 N/A R7 N/A 2.7 N/A 3 Annual Average PM2.5 (µg/m ) R3 N/A 0.6 N/A R4 8 µg/m3 N/A 0.6 N/A R7 N/A 0.6 N/A Dust Deposition (g/m2/month) R3 Incremental 2.0 0.4 2.4 R4 increase of 2.0 0.3 2.3 2 g/m2/month R7 and cumulative total of 2.0 0.2 2.2 4 g/m2/month N/A: Data Not Available Source: SLR (2015b) – Table 24, Table 25, Table 26, Table 27, Table 30 and Table 31

BLACK OAK MINERALS LIMITED STATEMENT OF ENVIRONMENTAL EFFECTS Mt Boppy Gold Mine Report No. 569/05

4.5.6 Operational Controls and Management Measures

Existing operational control measures that have been implemented to manage air emissions within the Mine would be continued under the Proposed Modification. These include the following activities.  Operations during wind events when the wind is blowing strongly from the western quadrant (i.e. wind directions between 225° and 315°) would be managed to ensure dust emissions are reduced. This would essentially involve increasing the intensity of dust management measures, principally watering of active sections of the Mine Site and reducing the intensity of activities that significantly contribute to dust emissions during these times. The selection of activities to be limited would be based on the Emissions Inventory provided as Appendix A to SLR (2015b).  Re-establish and operate the existing network of five static deposited dust monitoring locations and one real time monitor to sample and record deposited dust levels at the Mine Site.  Grading and watering of all on-site roads, as needed, to maintain the surface of the road and reduce dust lift off. This would include the surface of the waste rock emplacement as this is constructed.  All mining equipment and other on-site vehicles would be fitted with appropriate exhaust controls and vehicles regularly serviced to maintain exhaust systems at suitable levels.  Mineral ore would continue to be transported as covered loads.  All vehicles travelling on internal, unsealed roads within the Mine Site would continue to be limited to a speed no greater than 10km/hr.  The complaints management system would continue to be maintained to ensure that all complaints are dealt with through investigation and implementation of corrective treatments.

4.5.7 Assessment of Impacts

Modelling of particulate matter dispersion completed by SLR (2015b) has predicted that particulate matter emitted from the Mine would not exceed air quality goals at surrounding privately-owned residential receptors except for 24-hour Annual Average PM10 at Residence R4. However, further consideration of the modelling results determined that the major contributor to exceedances in all cases were high background levels influenced by wind conditions. The Applicant has proposed to manage potential exceedances by limiting the intensity of operations during windy conditions and maintaining the existing network of deposited dust monitoring locations. In addition, a series of standard controls and operational safeguards would limit dust emissions and greenhouse gas emissions from operational activities and existing negotiated agreements with residents living at nearby residential receivers would remain in place.

STATEMENT OF ENVIRONMENTAL EFFECTS BLACK OAK MINERALS LIMITED Report No. 569/05 Mt Boppy Gold Mine

Based on the assessment completed by SLR (2015b) and the implementation of management controls and operational safeguards it is expected that there would be only minor dust impacts associated with the Proposed Modification.

4.5.8 Monitoring

Given that significant impacts to air quality around the Mine are not expected to occur, monitoring of air quality is not considered to be necessary. However, to ensure local air quality is appropriately managed, the Applicant would recommence operation of the network of monitoring locations described in Section 4.5.6. In addition, should any substantiated complaints be received by the Applicant, an investigation involving additional monitoring, as necessary, would be initiated to ensure compliance with the criteria adopted in Section 4.5.3 is being achieved.

4.6 GENERAL ASSESSMENT OF ENVIRONMENTAL EFFECTS

The Applicant contends that the remaining environmental issues are likely to be largely unaffected by the Proposed Modification. As a result and in the interest of brevity, each of these issues has been addressed in this subsection in tabular form.

Table 4.9 presents an overview of these issues. For each issue the Applicant’s objectives in managing environmental aspects, a description of the existing environment, an overview of environmental management and mitigation measures that would be implemented and an assessment of potential residual impacts after implementation of management and mitigation measures are provided.

54 Mt BLACK OAKLIMITED MINERALS

Boppy GoldBoppy Mine

Table 4.9

Assessment of Impacts for Remaining Environmental Issues Page 1 of 4 Management/Mitigation Objectives Existing Environment Impact Assessment

Measures BIODIVERSITY To ensure the Proposed Figure 2.1 presents the vegetation  Avoid disturbance of the As surface disturbing activities Modification does not adversely communities within the Mine Site. The Benson 103 Vegetation associated with the Proposed impact native flora and fauna, their western section of the Mine Site is Community. Modification would largely be with habitat or other biodiversity values dominated by the Benson 103 areas of existing or approved  Continue to implement pest in the vicinity of the Mine Site. Vegetation Community, with the disturbance, no significant and weed management remainder of the Mine Site vegetation biodiversity-related impacts are measures. classified as “disturbed” anticipated. (Polymetals, 2011). No vegetation within the Mine Site is classified as an Endangered Ecological Community and a previous assessment has determined that there would be no significant adverse effects on threatened

species (Polymetals, 2011). OF ENVIRONMENTALSTATEMENT EFFECTS ABORIGINAL HERITAGE To manage existing sites of A field survey conducted on Existing management measures The Proposed Modification would Aboriginal cultural heritage 5 September 2011 completed in would be extended to the not result in disturbance of significance and identify any conjunction with the Ngiyampaa / Proposed Modification and include additional areas. As a result, there potential sites of Aboriginal heritage Ngemba Aboriginal Traditional Owners the following. would be no impact expected as a Environmental Impact Statement value. for the  Maintain the existing protection result of the Proposed Modification. To consider the area within a that accompanied the original application provided for AHIMS sites 26-5- regional Aboriginal heritage context. for DA 2011/LD-00070 identified two 0035 and 26-5-0036. scar trees within the Mine Site.

(Polymetals, 2011). No. Report

569/05

No. Report OF ENVIRONMENTALSTATEMENT EFFECTS Table 4.9 (Cont’d)

Assessment of Impacts for Remaining Environmental Issues Page 2 of 4

Management/Mitigation 569/05 Objectives Existing Environment Impact Assessment Measures

ABORIGINAL HERITAGE (CONT’D) To manage existing sites of These sites consisted of two scarred  Should it become necessary to Aboriginal cultural heritage mature Bimble Box (Eucalyptus remove the identified scar significance and identify any populnea) that have since been trees, salvage and possible potential sites of Aboriginal heritage registered with the Aboriginal Heritage excavation would be value. Information Management System undertaken in consultation with (AHIMS) as sites 26-5-0035 and 26-5- the Ngiyampaa / Ngemba To consider the area within a regional Aboriginal heritage context. 0036. The location of these sites is Aboriginal Traditional Owners. (Cont’d) displayed on Figure 2.1. Both sites have Maintain existing protocols relating been cordoned off for their protection to site staff induction and training and appropriate management measures and the unexpected discovery of implemented. sites or artefacts with Aboriginal cultural heritage value. SURFACE WATER RESOURCES Existing water management Watercourses in the vicinity of the Mine  Maintain existing surface water Given the implementation of erosion controls have been established Site are ephemeral and have been the control structures, including and sediment, potentially acid within the Mine Site in order to meet subject of prior disturbance/realignment. regular inspections and forming material and irrigation the following objectives. maintenance as required. controls, it is anticipated that the Proposed Modification would have  Divert clean water away from  Construct SB1, SB2 and SB3 no impact to surface water quality or disturbed areas. in accordance with the water use. BLACK  Collect suspended sediments requirements of in runoff from disturbed areas. Landcom (2004) and DECC (2008).  Contain any low pH leachate OAKLIMITED MINERALS on site.  Ensure “increased risk”

potentially acid forming Mt

material is placed within

Boppy GoldBoppy Mine Tailings Storage Facility 3 and “moderate risk” potentially acid forming material within Waste Rock Emplacement 1.

56 Mt BLACK OAKLIMITED MINERALS

Boppy GoldBoppy Mine Table 4.9 (Cont’d)

Assessment of Impacts for Remaining Environmental Issues Page 3 of 4 Management/Mitigation Objectives Existing Environment Impact Assessment Measures

SURFACE WATER RESOURCES (CONT’D) Existing water management  Ensure that water used for controls have been established irrigation is not permitted to within the Mine Site in order to meet flow to natural drainage.

the following objectives.  Divert clean water away from disturbed areas.  Collect suspended sediments in runoff from disturbed areas. Contain any low pH leachate on site. (Cont’d) GROUNDWATER RESOURCES To ensure the Proposed Groundwater quality is poor, with As no additional groundwater The Proposed Modification would

Modification does not adversely measured total dissolved solid would be intercepted and no not impact groundwater resources. OF ENVIRONMENTALSTATEMENT EFFECTS impact local groundwater concentrations of between 2 200mg/L additional water would be resources. and 3 500mg/L. required, no additional mitigation The closest registered water bore is measures are proposed. 23km to the southwest of the Mine Site and there are no know groundwater dependent ecosystems in the vicinity of the MS (Polymetals, 2011). SOIL AND LAND CAPABILITY To ensure that the Proposed The Mine Site is an active mine site. Progressive and final rehabilitation The Proposed Modification would

Report No. No. Report Modification includes an Limited soil resources have been measures identified in the have no impact to existing soil and environmentally sound approach to previously stripped and soil stockpiles approved MOP would continue to land capability. soil management and rehabilitation. established. Progressive and final be implemented. As a result, no rehabilitation is described in the soil or land capability-specific

569/05 approved MOP. management measures are proposed.

No. Report OF ENVIRONMENTALSTATEMENT EFFECTS Table 4.9 (Cont’d)

Assessment of Impacts for Remaining Environmental Issues Page 4 of 4

Management/Mitigation 569/05 Objectives Existing Environment Impact Assessment Measures

SOCIO-ECONOMIC To identify any positive or negative In March 2015, 5 residents lived within As the Proposed Modification The Proposed Modification would social or economic impacts that the village of Canbelego, with three non- would result in only minor changes enable the recommencement of may result from the Proposed project related residences. to the approved Mine, it is not mining operations within the Mine Modification and ensure that social considered that any additional Site, transportation of ore to the equity is maintained. mitigation or management Manuka Mine and the ongoing measures are necessary. operation of that Mine, each of which would result in ongoing employment for residents of the Cobar Local Government Area and surrounds.

BLACK

OAKLIMITED MINERALS

Boppy GoldBoppy Mine

BLACK OAK MINERALS LIMITED STATEMENT OF ENVIRONMENTAL EFFECTS Mt Boppy Gold Mine Report No. 569/05

5. EVALUATION OF THE PR OPOSAL

5.1 INTRODUCTION

In evaluating whether the development and operation of the Proposed Modification is justified, consideration has been given to biophysical and socio-economic factors, including the predicted residual impacts on the local and wider environment and the potential benefits of the Proposed Modification. A review of the Proposed Modification against the provisions of the EP&A Act that guide modification and assessment of development in NSW is provided, followed by a review of the objects of the Act and a final evaluation of the Proposed Modification.

5.2 EVALUATION OF RESIDUAL EFFECTS

5.2.1 Biophysical Considerations

Section 4 presents a range of residual impacts on the biophysical environment that are predicted should the Proposed Modification proceed, after the adoption of a number of operational controls and management measures. A brief summary and review of these residual impacts is provided below.

Acid Forming Material The assessment of waste rock material undertaken by RGS (2015) determined the presence of potentially acid forming material. To manage this material, where present, a regime for sampling, separation and encapsulation has been proposed. This would be enhanced by a range of monitoring measures that would ensure that any low pH leachate that may be generated would be detected during the life of the Mine.

Given that RGS (2015) determined there was a limited volume of “high risk” potentially acid forming waste rock and the proposed implementation of operational controls and management measures, the residual risk of discharge of low pH leachate from the Mine Site during the operational or rehabilitation phase of the Mine is considered to be low.

Traffic and Transportation A Traffic Impact Assessment Report (CS, 2015), considered the potential impacts of the Proposed Modification to road condition and intersection performance. The Applicant contends that transportation of ore from the Mine Site to the intersection of the Kidman Way and the Peak Way using 50t-capacity A-double road trains would be consistent with the approved transportation operations and, as a result, there would be no additional impacts compared to the approved operation of the Mine.

STATEMENT OF ENVIRONMENTAL EFFECTS BLACK OAK MINERALS LIMITED Report No. 569/05 Mt Boppy Gold Mine

Noise An assessment of the acoustical environment prepared by SLR (2015a) predicted that operational noise levels would exceed criteria levels for both the project-specific noise criteria and sleep disturbance criteria at privately-owned residential receptors. However, these noise levels are consistent with or less than previously predicted and approved noise levels and all privately-owned residences are subject to existing confidential agreements concerning noise emitted from the Mine.

All road noise levels predicted by SLR (2015a) for Mine-related transportation were compliant with the NSW Road Noise Policy during all periods of operation. Based on this assessment, road noise emissions would not constrain transportation operations.

The implementation of controls and operational safeguards described in Section 4.5.6, including development of a noise management plan, would limit noise emissions as much as practically possible.

Air Quality Modelling of particulate matter dispersion completed by SLR (2015b) has predicted that particulate matter emitted from the Mine would not exceed air quality goals at surrounding privately-owned residential receptors except for 24-hour Annual Average PM10 at Residence R4. However, further consideration of the modelling results determined that the major contributor to exceedances in all cases was high background levels influenced by wind conditions. The Applicant has proposed to manage potential exceedances by limiting the intensity of operations during windy conditions. In addition, a series of standard controls and operational safeguards would limit dust emissions from operational activities.

Remaining Environmental Issues An assessment of remaining environmental issues determined that the Proposed Modification would not result in significant changes to existing impacts relating to biodiversity, Aboriginal cultural heritage, surface water and groundwater resources, soil and land capability and visual amenity.

5.3 SOCIO-ECONOMIC CONSIDERATIONS

The Proposed Modification would not result in any anticipated changes to significantly impact the socio-economic conditions of the local or regional setting. Rather, the recommencement of mining operations would produce benefits such as employment for residents of the Cobar Local Government Area and surrounds, spending of maintenance and other services and the payment of taxes, licensing fees and other contributions to the local, State and national economy.

BLACK OAK MINERALS LIMITED STATEMENT OF ENVIRONMENTAL EFFECTS Mt Boppy Gold Mine Report No. 569/05

5.4 SECTION 96(2) CONSIDERATIONS

5.4.1 Introduction

Section 96(2) of the EP&A Act sets out the requirements to be met for a consent authority to modify a consent. The following subsections provide an evaluation of the Proposed Modification against the provisions of Section 96(2).

5.4.2 Substantially the Same Development

Section 96(2)(a) of the EP&A Act 1979 nominates that “A consent authority may…modify a consent if: a) it is satisfied that the development to which the consent as modified relates is substantially the same development as the development for which consent was originally granted and before that consent as originally granted was modified (if at all) under this section”.

The Applicant contends that the Proposed Modification would effectively remain “substantially the same development” for the following reasons.  The Proposed Modification would result in only minor adjustments to the approved Mine Site layout.  The Proposed Modification would utilise the approved transportation route.  Rehabilitation of the Mine Site would result in substantially the same final landform as the currently approved final landform.

5.4.3 Consultation with the Relevant Minister, Public Authority or Approval Body

Section 96(2)(b) of the EP&A Act 1979 states that “A consent authority may…modify a consent if: b) it has consulted with the relevant Minister, public authority or approval body (within the meaning of Division 5) in respect of a condition imposed as a requirement of a concurrence to the consent or in accordance with the general terms of an approval proposed to be granted by the approval body and that Minister, authority or body has not, within 21 days after being consulted, objected to the modification of that consent”.

The Applicant notes that this is a matter for Council. However, as discussed in Section 1.5 the Applicant has consulted with all government agencies involved in the original consent. Where assessment requirements have been provided, they are presented in Appendix 3 and summarised in Appendix 4, together with a cross reference of where each item raised has been addressed in this document.

STATEMENT OF ENVIRONMENTAL EFFECTS BLACK OAK MINERALS LIMITED Report No. 569/05 Mt Boppy Gold Mine

5.4.4 Notification of the Application

Section 96(2)(c) of the EP&A Act 1979 states that “A consent authority may…modify a consent if: c) “it has notified the application in accordance with: (i) the regulations, if the regulation so require, or (ii) a development control plan, if the consent authority is a council that has made a development control plan under section 72 that requires the notification or advertising of applications for modification of a development consent”.

The Applicant notes that this is a matter for Council. However, the Applicant anticipates that Council will notify relevant parties in accordance with Clause 118 of the Environmental Planning and Assessment Regulation 2000.

5.4.5 Submissions Regarding the Proposal

Section 96(2) (d) of the EP&A Act 1979 states that “A consent authority may…modify a consent if: d) it has considered any submissions made concerning the Proposed Modification within the period prescribed by the regulations or provided by the development control plan, as the case may be”.

This is a matter for the Council to consider. However, the Applicant would be pleased to respond to any submissions received by Council during the assessment process.

5.5 SECTION 79C(1) CONSIDERATIONS

5.5.1 Introduction

Section 79C(1) of the EP&A Act sets out the matters for consideration by a consent authority when determining an application for development consent. The following subsections provide an evaluation of the Proposed Modification against the provisions of that section.

5.5.2 Environmental Planning Instruments, Plans and Regulations (Section 79C (1a))

Cobar Local Environmental Plan 2012 The Applicant notes that the Mine Site is situated within land zoned as Zone RU1 - Primary Production under the Cobar Local Environment Plan 2012. The objectives of Zone RU1 – Primary Production under that plan are as follows. “To encourage sustainable primary industry production by maintaining and enhancing the natural resource base. To encourage diversity in primary industry enterprises and systems appropriate for the area.

BLACK OAK MINERALS LIMITED STATEMENT OF ENVIRONMENTAL EFFECTS Mt Boppy Gold Mine Report No. 569/05

To minimise the fragmentation and alienation of resource lands. To minimise conflict between land uses within this zone and land uses within adjoining zones.”

Open cut mining is permitted with consent in this zone.

SEPP (Mining, Petroleum Production and Extractive Industries) 2007 The SEPP specifies matters requiring consideration in the assessment of any mining development, as defined in NSW legislation. Table 5.1 presents a summary of the relevant clauses requiring consideration and the Proposed Modification with respect to each relevant clause.

Table 5.1

Application of SEPP (Mining, Petroleum Production and Extractive Industries) 2007 Page 1 of 3 Relevant SEPP Description Comments Clause 12: Compatibility Consideration is given to: The Proposed Modification would with other land permit the recommencement of an  the existing uses and approved uses of land uses existing approved land use within in the vicinity of the development; the Mine Site. The land in  the potential impact on the preferred land question has been previously uses (as considered by the consent disturbed by mining activities and authority) in the vicinity of the development; the Proposed Modification would and be considered a beneficial use  any ways in which the development may be with respect to alternative incompatible with any of those existing, available uses. approved or preferred land uses. The land within and surrounding The respective public benefits of the the Mine Site is zoned for Primary development and the existing, approved or Production. As such the use for preferred land uses are evaluated and open cut mining would not conflict compared. with surrounding agricultural use. Measures proposed to avoid or minimise any incompatibility are considered. 12AA: Consideration is given to the significance of the The recommencement of Significance resource that is the subject of the application, operations at the Mine Site would of resource having regard to: result in initial employment of 30 people reducing to 23 after the  the economic benefits, both to the State and initial 11 months of operations. the region; and In addition, it would be expected  the advice provided by the DG of DTIRIS as that the operation would contribute to the relative significance of the resource in to the local, regional and wider comparison with other mineral resources economies through direct and across the State. indirect economic benefits associated with an annual expenditure of an estimated $15M. No advice has been sought from DRE regarding the significance of the resource.

STATEMENT OF ENVIRONMENTAL EFFECTS BLACK OAK MINERALS LIMITED Report No. 569/05 Mt Boppy Gold Mine

Table 5.1 (Cont’d)

Application of SEPP (Mining, Petroleum Production and Extractive Industries) 2007 Page 2 of 3 Relevant SEPP Description Comments Clause 12AB: Consideration is given to development This is a matter for Council. Non- standards that, if complied with, prevents the discretionary consent authority from requiring more onerous development standards for those matters standards for mining 13: Compatibility Consideration is given to whether the The Proposed Modification would with mining, development is likely to have a significant not limit access to or impact the petroleum impact on current or future mining, petroleum development of future mining production or production or extractive industry and ways in operations. extractive which the development may be incompatible. industry Measures taken by the Proponent to avoid or minimise any incompatibility are considered. The public benefits of the development and any existing or approved mining, petroleum production or extractive industry must be evaluated and compared. 14: Natural Consideration is given to ensuring that the The environmental performance of resource and development is undertaken in an the Mine is discussed in environmental environmentally responsible manner, including Section 1.4.3. In summary, no management conditions to ensure: complaints or non-compliances issues have been recorded in the  impacts on significant water resources, Applicant’s complaints including surface and groundwater management system or in the resources, are avoided or minimised; most recent Annual Return  impacts on threatened species and provided for EPL 20192 biodiversity are avoided or minimised; and respectively.  greenhouse gas emissions are minimised The Applicant would continue to and an assessment of the greenhouse gas manage surface water resources emissions (including downstream in order to separate clean, dirty emissions) of the development is provided. and potentially contaminated water and ensure water storage capacity is sufficient to manage a 1 in 100 year-72 hour rainfall event. The proposed Modification would not intercept significant additional groundwater resources nor result in contamination of the underlying aquifer. The Proposed Modification would not result in significant impacts to threatened species or regional biodiversity as no additional disturbance is proposed outside that previously approved.

BLACK OAK MINERALS LIMITED STATEMENT OF ENVIRONMENTAL EFFECTS Mt Boppy Gold Mine Report No. 569/05

Table 5.1 (Cont’d)

Application of SEPP (Mining, Petroleum Production and Extractive Industries) 2007 Page 3 of 3 Relevant SEPP Description Comments Clause 14: Natural The Applicant would continue to resource and limit greenhouse gas emissions, environmental as much as practicable, through management management and regular (Cont’d) maintenance of its fleet of vehicles. 15: Resource The efficiency of resource recovery, including The efficiency of resource recovery the reuse or recycling of material and recovery would be maximised minimisation of the creation of waste, is through stockpiling within the considered. extended ROM-pad while transportation activities continue. It is proposed that transportation activities would continue for an additional 12 to 18 months after mining activities have ceased. This would ensure that ore is recovered efficiently, minimise waste and allow the Applicant to progressively rehabilitate areas no longer in use. All processing activities would be undertaken at the Manuka Mine reducing the need to double- handle material and creating efficiencies in waste creation, energy use and transportation. 16: Transportation The following transport-related issues are Material transported from the Mine considered. Site would use the local and State  The transport of some or all of the materials road network to deliver ore from the site by means other than public material to the Manuka Mine. No road. feasible alternative to road transportation is available. The  Limitation of the number of truck Proposed Modification would not movements that occur on roads within change the existing approved residential areas or roads near to schools. transportation route.  The preparation of a code of conduct for the transport of materials on public roads. 17: Rehabilitation The rehabilitation of the land affected by the A summary of the proposed development is considered including: approach to rehabilitation is provided in Section 2.9. The Mine  the preparation of a plan that identifies the Site would be rehabilitated in proposed end use and landform of the land accordance with the approved once rehabilitated; Mining Operations Plan for the Mt  the appropriate management of Boppy Gold Mine. These plans development generated waste; would be adjusted to reflect the  remediation of any soil contaminated by the conditions of the Proposed development; and Modification, should it be approved.  the steps to be taken to ensure that the The Proposed Modification would state of the land does not jeopardize public not constrain the final land use or safety, while being rehabilitated or at the expected final landform. completion of rehabilitation.

STATEMENT OF ENVIRONMENTAL EFFECTS BLACK OAK MINERALS LIMITED Report No. 569/05 Mt Boppy Gold Mine

5.5.3 Likely Impacts of the Development (Section 79C (1b))

A detailed assessment of the environmental factors potentially impacted by the Proposed Modification is provided throughout Section 4. The continued and proposed operational controls and management measures that would be implemented and the residual environmental effects of the Proposed Modification have also been described. A summary and evaluation of the potential biophysical and socio-economic impacts of the Proposed Modification is provided in Section 5.2.

5.5.4 Suitability of the Site (Section 79C (1c))

The Mine is located within a zone in which open cut mining is permissible with consent. The Mine Site has a long history of mining activities.

5.5.5 Submissions (Section 79C (1d))

It is anticipated that Council will take any submissions into consideration during the assessment of this application.

5.5.6 The Public Interest (Section 79C (1e))

Given that the Proposed Modification would provide for the recommencement of operations at the Mine and the subsequent benefit to local employment and services as well as continued payment or taxes and royalties, it is considered that the Proposed Modification is in the public interest.

5.6 OBJECTS OF THE EP&A ACT

The Proposed Modification is being sought under Section 96(2) of the EP&A Act and must therefore satisfy the objects of that Act embodied in Section 5 of the Act. Table 5.2 identifies the objects of the EP&A Act and confirms that each has been satisfied by the Proposed Modification and this SoEE.

Table 5.2

Objects of the EP&A Act Page 1 of 2 Object Comments  to encourage:  the proper management, development and The Proposed Modification would occur wholly conservation of natural and artificial within land previously disturbed by mining and resources, including agricultural land, would therefore result in a beneficial use of land natural areas, forests, minerals, water, previously transformed and upon which most other cities, towns and villages for the purpose of land uses would be constrained. promoting the social and economic welfare of the community and a better environment,

BLACK OAK MINERALS LIMITED STATEMENT OF ENVIRONMENTAL EFFECTS Mt Boppy Gold Mine Report No. 569/05

Table 5.2 (Cont’d)

Objects of the EP&A Act Page 2 of 2 Object Comments  the promotion and co-ordination of the The Proposed Modification would result in a orderly and economic use and development beneficial use of land previously transformed by of land, mining activity without limiting surrounding land uses.  the protection, provision and co-ordination of No additional communication or utility services communication and utility services, would be required by the Proposed Modification and therefore no additional impact requiring specific consideration and management would result.  the provision of land for public purposes, The Mine Site is an existing mine located on Temporary Town Common (Crown Land) and it is not proposed that this land be provided for public purposes.  the provision and co-ordination of The Mine Site is located on Temporary Town community services and facilities, and Common (Crown Land) and would not impact the provision and co-ordination of community services and facilities.  the protection of the environment, including The Proposed Modification would involve activities the protection and conservation of native within previously approved and disturbed areas and animals and plants, including threatened would therefore not result in additional impacts to species, populations and ecological threatened species, populations and ecological communities, and their habitats, and communities, and their habitats  ecologically sustainable development, and On the basis that the Proposed Modification would have minimal additional residual impacts on the biophysical environment it is considered to conform to the principles of ecologically sustainable development.  the provision and maintenance of affordable The Proposed Modification would not contribute to housing, and any additional pressure on local housing.  to promote the sharing of the responsibility for The relevant environmental planning legislation has environmental planning between the different been reviewed in Section 5.4.2. It has been levels of government in the State, and concluded that the Proposed Modification would meet the requirements of all relevant legislation and would not constrain the ability of different levels of government in the State to exercise their functions.  to provide increased opportunity for public The Applicant anticipates that this application will involvement and participation in environmental be made publicly available by Council and that the planning and assessment. public will be encouraged to make submissions.

5.7 CONCLUSION

The Proposed Modification provides for the recommencement of mining operations at the Mt Boppy Mine in a manner that would maximise the efficiency of resource recovery while minimising environmental impacts through the consolidation of processing operations at the Manuka Mine.

STATEMENT OF ENVIRONMENTAL EFFECTS BLACK OAK MINERALS LIMITED Report No. 569/05 Mt Boppy Gold Mine

The following conclusions have been made throughout the Statement of Environmental Effects concerning potential impacts to the biophysical or socio-economic environment.  The residual risk of discharge of low pH leachate from the Mine Site during the operational or rehabilitation phase of the Mine would be low.  The use of 50t-capacity A-double road trains initially would be consistent with the approved transportation operations and, as a result, there would be no additional impacts compared to the approved operation of the Mine. Use of the proposed 60t AB-triple road trains would commence only after completion of a Road Audit for the approved transportation route and completion of the required road upgrade.  Predicted operational noise levels at surrounding residential receptors are consistent with the previously predicted and approved noise levels and all privately-owned residences are subject to existing confidential agreements concerning noise emissions from the Mine.  All road noise levels associated with Mine-related transportation are predicted to be compliant with the NSW Road Noise Policy, during all periods of operation.  Only minor dust impacts would result from the Proposed Modification.  There would be no additional impacts to biodiversity, Aboriginal cultural heritage, surface water and groundwater resources, soil and land capability and visual amenity.  There would be no additional adverse impacts to the local or regional socio- economic setting. Rather the Proposed Modification would result in beneficial impacts such as employment and expenditure on services.

Based on the implementation of proposed operational controls and management measures, it is assessed that the Proposed Modification would be undertaken in a manner that would satisfy all relevant statutory goals and criteria, environmental objectives and reasonable community expectations.

BLACK OAK MINERALS LIMITED STATEMENT OF ENVIRONMENTAL EFFECTS Mt Boppy Gold Mine Report No. 569/05

6. REFERENCES

Acid Solutions Pty Ltd (Acid Solutions) 2014. Mount Boppy Mine Site Water Quality Report for RW Corkery & Co Pty Ltd

Australian and New Zealand Environment and Conservation Council (ANZECC) (2000). Australian and New Zealand Guidelines for Fresh and Marine Water Quality.

Austroads (2009). Guide to Road Design – Part 4A: Un-signalised and Signalised Intersections.

Department of Environment and Conservation (DEC) 2005. “Approved Methods for the Modelling and Assessment of Air Pollutants in NSW”.

Department of Environment and Climate Change (DECC) (2008). Managing Urban Stormwater – Soils and Construction – Volume 2C Unsealed Roads.

Landcom (2004). Managing Urban Stormwater – Volumes 1 and 2C.

NEPM, 1998. National Environment Protection (Ambient Air Quality) Measure.

OEH, 2012. The land and soil capability assessment scheme: Second approximation.

Polymetals (Mt Boppy) Pty Ltd (Polymetals), 2011. Mt Boppy Gold Mine Proposed Redevelopment Project - Environmental Impact Statement - Version 1

Roads and Traffic Authority (2002). Guide to Traffic Generating Developments: Version 2.2.

RWC, 2015. Mining Operations Plan for the Mount Boppy Gold Mine (in preparation)

SEEC (2011). Soils Assessment for Proposed expansion of Mt Boppy Gold mine Canbelego, NSW.

SLR Consulting Australia (SLR) (2012). Mount Boppy Gold Mining Operations Project – Operational Noise and Blasting Impact Assessment.