INTEGRA UNDERGROUND MINE
Annual Review 2018
Prepared for:
HV Coking Coal Pty Ltd PO Box 534 SINGLETON NSW 2330
SLR Ref: 630.12690-R02 Version No: v1.0 July 2019 HV Coking Coal Pty Ltd SLR Ref No: 630.12690-R02-v1.0 Integra Annual Review_Clean.docx Integra Underground Mine July 2019 Annual Review 2018
PREPARED BY
SLR Consulting Australia Pty Ltd ABN 29 001 584 612 10 Kings Road New Lambton NSW 2305 Australia (PO Box 447 New Lambton NSW 2305 Australia) T: +61 2 4037 3200 F: +61 2 4037 3201 E: [email protected] www.slrconsulting.com
BASIS OF REPORT
This report has been prepared by SLR Consulting Australia Pty Ltd with all reasonable skill, care and diligence, and taking account of the timescale and resources allocated to it by agreement with HV Coking Coal Pty Ltd (the Client). Information reported herein is based on the interpretation of data collected, which has been accepted in good faith as being accurate and valid.
This report is for the exclusive use of the Client. No warranties or guarantees are expressed or should be inferred by any third parties. This report may not be relied upon by other parties without written consent from SLR
SLR disclaims any responsibility to the Client and others in respect of any matters outside the agreed scope of the work.
DOCUMENT CONTROL
Reference Date Prepared Checked Authorised 630.12690-R02-v1.0 29 July 2019 Megan Crowhurst Chris Jones Chris Jones 630.12690-R01-v1.0 29 March 2019 Megan Crowhurst Adam Williams Adam Williams
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HV Coking Coal Pty Ltd SLR Ref No: 630.12690-R02-v1.0 Integra Annual Review_Clean.docx Integra Underground Mine July 2019 Annual Review 2018
CONTENTS
1 STATEMENT OF COMPLIANCE ...... 1 2 INTRODUCTION ...... 2 2.1 Background ...... 2 2.2 History of Operations ...... 2 2.3 Purpose ...... 5 2.4 Mine Contacts ...... 7 3 APPROVALS ...... 8 3.1 Project Approval ...... 8 3.2 Leases ...... 8 3.3 Licences ...... 9 3.3.1 Environment Protection Licence ...... 9 3.3.2 Surface Water Licences ...... 9 3.3.3 Groundwater Licences ...... 9 3.3.4 Sewerage Management ...... 10 3.4 Other Approvals ...... 10 3.4.1 Mining Operations Plan ...... 10 3.4.2 Extraction Plan ...... 10 4 OPERATIONS DURING THE REPORTING PERIOD ...... 11 4.1 Mining Operations ...... 11 4.2 Exploration ...... 11 4.3 Other Operations ...... 13 4.3.1 Coal Processing ...... 13 4.3.2 Construction ...... 13 4.3.3 Mobile Plant and Equipment ...... 13 4.3.4 Land Subdivision & Ownership Transfers ...... 13 4.4 Next Reporting Period ...... 14 4.4.1 Mining ...... 14 4.4.2 Exploration ...... 14 4.4.3 Construction ...... 15 4.4.4 Land Subdivision & Ownership Transfers ...... 15 5 ACTIONS REQUIRED FROM PREVIOUS ANNUAL REVIEW ...... 16 5.1 2017 Annual Review ...... 16 5.2 2018 Annual Review ...... 16 6 ENVIRONMENTAL PERFORMANCE ...... 17 6.1 Meteorology ...... 17
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CONTENTS
6.1.1 Rainfall ...... 17 6.1.2 Temperature ...... 18 6.1.3 Wind Speed and Direction ...... 19 6.2 Air Quality ...... 19 6.2.1 Environmental Monitoring Results ...... 22 6.2.2 Comparison with Predictions ...... 24 6.2.3 Comparison with Long Term Data ...... 25 6.2.4 Key Performance and/or Management Issues ...... 26 6.2.5 Proposed Actions for 2019 ...... 26 6.3 Noise ...... 26 6.3.1 Environmental Monitoring Results ...... 29 6.3.2 Comparison with Predictions ...... 31 6.3.3 Key Performance and/or Management Issues ...... 31 6.3.4 Proposed Actions for 2019 ...... 31 6.4 Biodiversity ...... 31 6.4.1 Environmental Monitoring Results ...... 31 6.4.2 Key Performance and/or Management Issues ...... 33 6.4.3 Proposed Actions for 2019 ...... 33 6.5 Aboriginal Heritage ...... 33 6.5.1 Environmental Monitoring Results ...... 33 6.5.2 Key Performance and/or Management Issues ...... 34 6.5.3 Proposed Actions for 2019 ...... 34 6.6 Historical Heritage ...... 34 6.6.1 Unexpected Finds Protocol ...... 35 6.6.2 Key Performance and/or Management Issues ...... 35 6.6.3 Proposed Actions for 2019 ...... 35 6.7 Waste ...... 35 6.7.1 Environmental Monitoring Results ...... 35 6.7.2 Sewerage Treatment ...... 36 6.7.3 Key Performance and/or Management Issues ...... 36 6.7.4 Proposed Actions for 2019 ...... 36 6.8 Weed and Pests ...... 36 6.8.1 Environmental Monitoring Results ...... 36 6.8.2 Key Performance and/or Management Issues ...... 36 6.8.3 Proposed Actions for 2019 ...... 37 6.9 Bushfire ...... 37 6.9.1 Key Performance and/or Management Issues ...... 37
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CONTENTS
6.9.2 Proposed Actions for 2019 ...... 37 6.10 Greenhouse Gas ...... 38 6.10.1 Environmental Monitoring Results ...... 38 6.10.2 Comparison with Predictions ...... 38 6.10.3 Key Performance and/or Management Issues ...... 39 6.10.4 Proposed Actions for 2019 ...... 39 6.11 Hydrocarbon Management ...... 39 6.11.1 Environmental Monitoring Results ...... 39 6.11.2 Key Performance and/or Management Issues ...... 39 6.11.3 Proposed Actions for 2019 ...... 39 6.12 Public Safety ...... 39 6.12.1 Environmental Monitoring Results ...... 40 6.12.2 Key Performance and/or Management Issues ...... 40 6.12.3 Proposed Actions for 2019 ...... 40 6.13 Subsidence ...... 40 6.13.1 Environmental Monitoring Results ...... 40 6.13.2 Comparison with Predictions ...... 41 6.13.3 Key Performance and/or Management Issues ...... 41 6.13.4 Proposed Actions for 2019 ...... 41 7 WATER MANAGEMENT ...... 42 7.1 Water Balance ...... 44 7.2 Water Take ...... 45 7.3 Changes to Licences ...... 45 7.4 Discharges ...... 45 7.5 Surface Water ...... 45 7.5.1 Environmental Monitoring Results ...... 45 7.5.2 Stream Health and Channel Stability ...... 47 7.5.3 Comparison with Predictions ...... 48 7.5.4 Long Term Trend Analysis ...... 48 7.5.5 Key Performance and/or Management Issues ...... 50 7.5.6 Proposed Actions for 2019 ...... 50 7.6 Groundwater ...... 50 7.6.1 Environmental Monitoring Results ...... 50 7.6.2 Alluvium Interception ...... 52 7.6.3 Comparison with Predictions ...... 52 7.6.4 Long Term Trend Analysis ...... 53 7.6.5 Key Performance and/or Management Issues ...... 54
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CONTENTS
7.6.6 Proposed Actions for 2019 ...... 54 8 REHABILITATION ...... 55 8.1 Rehabilitation Outcomes and Objectives ...... 55 8.2 Status of Mining and Rehabilitation ...... 56 8.3 Comparison against MOP Predictions ...... 56 8.4 Post Rehabilitation Land Use ...... 58 8.5 Key Issues that May Affect Rehabilitation ...... 58 8.6 Rehabilitation Monitoring ...... 59 8.6.1 2018 Rehabilitation Monitoring Summary ...... 59 8.7 Rehabilitation Trials ...... 60 8.8 Removal of Buildings ...... 60 8.9 Proposed Actions for 2019 ...... 60 9 COMMUNITY ...... 61 9.1 Overview ...... 61 9.2 Community Consultative Committee ...... 61 9.3 Community Contributions, Donations and Sponsorship ...... 61 9.4 Community Complaints ...... 62 10 INDEPENDENT AUDIT ...... 62 11 INCIDENTS AND NON COMPLIANCES ...... 65 11.1 Air Quality ...... 65 11.2 Groundwater ...... 65 11.3 Administrative Non-Compliance ...... 66 12 ACTIVITIES TO BE COMPLETED IN THE NEXT REPORTING PERIOD ...... 67 13 REFERENCES ...... 68
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CONTENTS DOCUMENT REFERENCES
TABLES Table 1 Statement of Compliance ...... 1 Table 2 Non Compliances During 2018 ...... 1 Table 3 Compliance Status Categories ...... 1 Table 4 Relevant Annual Review Requirements ...... 6 Table 5 Mine Contacts ...... 7 Table 6 PA 08_0101 and Modifications ...... 8 Table 7 Integra Underground Leases ...... 8 Table 8 Integra Underground Surface Water Licences ...... 9 Table 9 Integra Underground Groundwater Licences ...... 9 Table 10 Production Summary ...... 11 Table 11 Exploration Summary 2018 ...... 11 Table 12 Integra Underground Mobile Plant and Equipment ...... 13 Table 13 Exploration 2019 ...... 14 Table 14 DPE Actions Required from 2017 Annual Review ...... 16 Table 15 DPIE Actions Required from 2018 Annual Review ...... 16 Table 16 Summary of 2018 Data from Glendell Meteorological Station ...... 17 Table 17 PA 08_0101 Air Quality Criteria ...... 20 Table 18 Depositional Dust Gauges ...... 22 Table 19 TEOM Monitoring Results – Annual Averages ...... 22 Table 20 TEOM Monitoring Results – 24 Hour Averages and Number of Exceedances ...... 23 Table 21 HVAS Monitoring Results – Annual Average ...... 23 Table 22 Comparison of 2018 Air Quality Data Against the Predictions ...... 24 Table 23 Long term annual PM10 concentrations recorded at TSP2 – Middle Fallbrook (2006-2018) ...... 25 Table 24 Project Specific Noise Criteria (dB (A)) ...... 28 Table 25 Cumulative Noise Criteria ((dB (A) LAeq (period)) ...... 29 Table 26 Attended Noise Monitoring Results ...... 30 Table 27 Vegetation Types Recorded at Monitoring Sites ...... 32 Table 28 Summary of Waste 2018 ...... 35 Table 29 Greenhouse Gas Data ...... 38 Table 30 Comparison of Subsidence Parameters: Forecast and Measured ...... 41 Table 31 Water Balance 2018 ...... 44 Table 32 Water Take 2017 – 2018 ...... 45 Table 33 Surface Water Monitoring Results – pH and EC ...... 46 Table 34 Surface Water Monitoring Results – TSS and TDS ...... 47 Table 35 Groundwater Monitoring Results ...... 51 Table 36 PA 08_0101 Rehabilitation Objectives ...... 55 Table 37 Rehabilitation Status ...... 56 Table 38 Rehabilitation Progress Compared to MOP Predictions ...... 56 Table 39 Non Compliances and Exceedances ...... 63 Table 40 Groundwater Incidents and Non-Compliances in 2018 ...... 65 Table 41 Proposed Activities in 2019 ...... 67 Table 42 Full list of TEOM Exceedances ...... 1 Table 43 List of TSP 1 exceedances contributing to a high annual average ...... 1
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CONTENTS
FIGURES Figure 1 Locality ...... 3 Figure 2 Site Layout ...... 4 Figure 3 Operations and Construction during 2018 ...... 12 Figure 4 Rainfall (mm) ...... 18 Figure 5 Monthly Temperature ...... 18 Figure 6 Annual Wind Rose ...... 19 Figure 7 Air Quality Monitoring Locations ...... 21 Figure 8 Noise Monitoring Locations ...... 27 Figure 9 Water Monitoring Locations and Alluvium Mapping ...... 43 Figure 10 Long Term Surface Water pH Results...... 49 Figure 11 Long Term Surface Water EC Results ...... 49 Figure 12 Long Term Groundwater pH Results ...... 53 Figure 13 Long Term Groundwater EC Results ...... 53 Figure 14 Long Term Groundwater Level Results ...... 54 Figure 15 Rehabilitation and Disturbance ...... 57
PHOTOS Photo 1 Gas Well Rehabilitation Site, LW03_GW01 (Umwelt, 2019) ...... 59 Photo 2 Singleton Town Band (The Singleton Argus, 2018) ...... 62
APPENDIX Appendix A TEOM Exceedances Appendix B TSP Exceedances
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1 Statement of Compliance
Integra Underground Mine (Integra Underground) operates in accordance with Project Approval (PA) 08_0101, Environmental Protection Licence (EPL) 3390 and several mining tenements. A summary of compliance with these major approvals during 2018 is provided in Table 1.
Where non-compliances have been recognised, they are listed in Table 2 and detailed in later sections of this Annual Review. Table 3 presents the categories used to define the status of each non-compliance.
Table 1 Statement of Compliance
Were all conditions of the relevant approval(s) complied with? Yes/No PA 08_0101 No EPL 3390 Yes ML 1437 Yes ML 1518 Yes ML 1525 Yes ML 1551 Yes ML 1676 Yes CL 382 Yes
Table 2 Non Compliances During 2018
Relevant Condition Compliance Where Condition Comment Date Approval/Licence Summary Status Addressed PA 08_0101 Schedule 3, Air Quality Exceedance in Various Section 6.2 Condition 12 and Dust Non-Compliant HVAS (TSP) and 11 Monitoring
Table 3 Compliance Status Categories
Risk Level Colour Code Description Non-compliance with potential for significant environmental High Non-Compliant consequences, regardless of the likelihood of occurrence Non-compliance with potential for serious environmental Medium Non-Compliant consequences, but is unlikely to occur; or potential for moderate environmental consequences, but is likely to occur Non-compliance with potential for moderate environmental Low Non-Compliant consequences, but is unlikely to occur; or potential for low environmental consequences, but is likely to occur Administrative Non-compliance which does not result in any risk of environmental Non-Compliant non-compliance harm
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2 Introduction 2.1 Background
Integra Underground is located approximately 12 km north‐west of Singleton, in the Singleton Local Government Area (LGA) (refer Figure 1).
Underground mining operations are approved at a maximum extraction rate of 4.5 million tonnes per annum (Mtpa) of run‐of‐mine (ROM) coal until 31 December 2035 under PA 08_0101. This approval allows longwall mining of the Hebden, Barrett and Middle Liddell seams to produce high quality, semi‐hard coking coal for export. The approved underground mine layout in the Middle Liddell Seam is shown in Figure 2.
Integra Underground was placed under care and maintenance in May 2014, during this time environmental management of the site was maintained under a Care and Maintenance Environmental Management System. Operations recommenced in 2017, with development resuming in February 2017 and longwall extraction resuming in May 2017. The reporting period (2018) is therefore the first full year of mining operations since being placed under care and maintenance.
Integra Underground completed secondary extraction of Longwall 13 in July 2018 and commenced secondary extraction of Longwall 14 in early September 2018. Development of first workings for Longwalls 15 and 16 continued in 2018, with secondary extraction of Longwall 15 due to commence in late July 2019.
2.2 History of Operations
Development Consent (DA 105/90) for Glennies Creek Colliery was granted on 1 November 1991 and was modified on six occasions to allow further surface facility development and increased production. An environmental assessment for mining within the Middle Liddell Seam beyond 2012 and in the Hebden and Barrett seams was submitted in July 2009 with the application (PA 08_0101) being approved in late 2010 by the former Department of Planning. To date, coal has been mined from the Middle Liddell Seam with approval and development also covering the Hebden and Barrett seams.
Camberwell Coal Joint Venture (CCJV) was granted Development Consent (DA 86/2889) for mining operation on 21 March 1990. Development commenced with the construction of the CHPP and rail loop facilities and the first coal was mined in the area known as the North Pit on 1 March 1991. Ten modifications have been granted, which related to matters such as increased production and surface infrastructure changes and upgrades. An application (PA 08_0102) for open cut mining operations within the Northern and Western Extension mining areas was approved in late 2010 by the former Department of Planning (now Department of Planning and Environment [DPE]).
CCJV and Glennies Creek Joint Venture (GCJV) were integrated on 4 August 2006 to form the Integra Coal Joint Venture (ICJV). AMCI Holdings Australia, part owner of ICJV, was bought by Brazil’s Companhia Vale do Rio Doce (CVRD) on the 20 April 2007. CVRD changed the company name to Vale on 29 November 2007 and on 11 February 2008 renamed CVRD Australia Pty Ltd as Vale Australia Pty Ltd. In December 2014, Vale Australia (GC) Pty Ltd, a subsidiary of Vale Australia Pty Ltd, acquired 3.6% from POS‐GC Pty Ltd, increasing its stake to 36%.
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The Integra Complex was operated as an unincorporated joint venture, with Integra Coal Operations Pty Limited being the management company responsible for all operations at both sites on behalf of the joint venture owners. Due to falling coal prices and increased operational costs at the Integra Complex, a decision was made by the Joint Ventures to place the Integra Complex under care and maintenance. Integra Underground and Integra Open Cut (IOC) were placed under care and maintenance on 28 July 2014 and 15 August 2014, respectively.
On 18 December 2015, HV Coking Coal Pty Limited (HVCC) (a 100% Glencore‐owned company) purchased the Integra Complex. Bloomfield Collieries Pty Limited (Bloomfield) subsequently purchased from Glencore the IOC, coal handling preparation plant (CHPP), train loading infrastructure and the rail loop.
EPL 3390 was applicable to the Integra Complex until 21 December 2015. At this time the EPL was varied to cover Integra Underground only, with the existing Rix’s Creek EPL (3391) varied to also cover Rix’s Creek North (previously IOC).
Prior to HVCC’s purchase of Integra Underground, the Integra Complex operated under a single project approval which combined the PA 08_0101 (Integra Underground) PA 08_0102 (IOC). Following the respective sales of the underground and open cut mines in December 2015, approval was sought to separate the combined project approval.
This separation of the combined project approval was granted through Modification (Mod) 5 on 23 August 2016. Until this modification was approved, an agreement between Bloomfield and HVCC outlined the separation of responsibilities under the Project Approval and EPL.
HVCC recommenced underground operations in 2017, with development resuming in February 2017 and longwall extraction resuming in May 2017 in accordance with the Extraction Plan as required under Condition 20 of Schedule 3 of PA 08_0101.
An application for Modification 8 (Mod 8) to PA 08_0101 and accompanying EA was lodged with the DPE in November 2017. The purpose of Mod 8 was to seek approval to continue longwall mining of the Middle Liddell Seam further to the north of the previously approved longwall panels, and construction and operation of ancillary surface infrastructure required to support the proposed mining activities. Subsequently, approval was granted by DPE on 16 April 2018.
2.3 Purpose
This Annual Review has been prepared for the reporting period of 1 January 2018 to 31 December 2018 (herein referred to as the reporting period).
This Annual Review has been prepared in accordance with: • The DPE publication Post Approval Requirements for State Significant Mining Developments – Annual Review Guideline (NSW Government 2015); • The environmental management and compliance reporting requirements contained in relevant mining tenements (CL 382, ML 1437, ML 1518, ML 1525, ML 1551 and ML 1676); • Schedule 5, Condition 11 of PA 08_0101; • Commitments in the approved Mining Operations Plan (MOP); • Commitments contained within the Integra Environmental Management System (EMS); and • Outcomes of the 2017 Annual Review.
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A summary of relevant requirements relating to this Annual Review is provided in Table 4.
Table 4 Relevant Annual Review Requirements
Condition Section Addressed PA 08_0101 Schedule 5, Condition 11 By the end of March each year, or other timing as may be agreed by the Secretary, the Proponent must submit a report to the Department reviewing the environmental performance of the project to the satisfaction of the Secretary. The review must: Sections 4, 8 and 12 a) describe the works (including any rehabilitation) that were carried out during the previous calendar year, and the works that are proposed to be carried out over the current calendar year; b) include a comprehensive review of the monitoring results and complaints records of the project over the previous calendar year, which includes a comparison of these results against the: • relevant statutory requirements, limits or performance measures/criteria; Sections 6, 7 and 9.4 • monitoring results of previous years; and • relevant predictions in the documents referred to in Condition 2 of Schedule 2; c) identify any non‐compliance over the previous calendar year, and describe Sections 1 and 11 what actions were (or are being) taken to ensure compliance; d) identify any trends in monitoring data over the life of the project; Sections 7.5.4 and 7.6.4 e) identify any discrepancies between the predicted and actual impacts of the Sections 6 and 7 project, and analyse the potential cause of any significant discrepancies; and f) describe what measures will be implemented over the current calendar year to Sections 6, 7 and 8 improve the environmental performance of the project. Schedule 3, Condition 36 The proponent must report on waste management and minimisation in the Annual Section 6.7 Review, to the satisfaction of the Secretary. ML 1437, ML 1518, ML 1525, ML 1551, ML 1676 3. Annual Rehabilitation Report (f) The lease holder must prepare a Rehabilitation Report to the satisfaction of the Minister. The report must: (i) provide a detailed review of the progress of rehabilitation against the performance measures and criteria established in the approved MOP; Section 8 (ii) be submitted annually on the grant anniversary date (or at such other times as agreed by the Minister); and (iii) be prepared in accordance with any relevant annual reporting guidelines published on the Department’s website. Bore Licence 20BL172505 and 20BL172506 The licence holder must submit an Annual Groundwater Report to the NSW Office Separate Annual Groundwater of Water (now DoI - Water) each year. Report Mining Operations Plan
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Condition Section Addressed Section 2.3.1 Exploration All exploration within a mining lease will be reported in the Integra Underground Section 4.2 Annual Review. Section 3.2.1.11 Air Quality The results of air quality monitoring will be assessed against the relevant criteria Section 6.2 from the Integra Underground Project Approval and EPL. Results will be provided in the Annual Review and EPL Annual Return. Section 8.1.1 Rehabilitation Monitoring Annual reviews will be conducted of rehabilitation monitoring data to assess trends Section 8 and monitoring programme effectiveness. The rehabilitation monitoring results, along with any remedial works required, will be summarised in the Annual Review. Section 10.1 Annual Review An Annual Review report is required to be prepared for Integra Underground as per Schedule 5, Condition 11 of the Project Approval. Section 8 The Annual Review includes a summary of rehabilitation monitoring and reporting and is sent to RR, DPE, OEH and other relevant stakeholders. Section 10.2 Incident Reporting Non-compliances and incidents will be reported within the Annual Review and EPL Sections 1 and 11 Annual Return.
Copies of this Annual Review will be made available to the DPE, the Department of Planning and Environment – Resources Regulator (RR), Department of Industry - Water (DoI Water), the Office of Environment and Heritage (OEH) and the Environment Protection Authority (EPA). Copies will also be provided to the members of the Community Consultative Committee (CCC) and a copy will be made available on the Integra Underground website.
2.4 Mine Contacts
Contact details for key personnel responsible for the environmental management at Integra Underground are provided in Table 5.
Table 5 Mine Contacts
Name Position Contact Peter Ostermann Operations Manager (02) 6577 4200 Keith Simkin Environment and Community Manager (02) 6577 4200 Evert Smit Technical Services Manager (02) 6577 4200
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3 Approvals
Operations at Integra Underground are regulated by a range of leases, licences and approvals, which are summarised in the following sections.
3.1 Project Approval
PA 08_0101 (as modified) allows for the extraction, processing and transportation of up to 4.5 Mtpa until 31 December 2035. Eight modifications to PA 08_0101 have been approved. Details of the approval and subsequent modifications are provided in Table 6.
Table 6 PA 08_0101 and Modifications
Approval Title Date Grated Expiry Original approval 26 November 2010 Mod 1 - Extend the open cut dump and increase 18 March 2012 emplacements height Mod 2 - Amendments to consent wording 1 February 2013 Mod 3 - Extend timeframes for conditions 5 October 2012 Mod 4 - Modify biodiversity offset areas 24 February 2016 Mod 5 - Separate into two project approvals for 23 August 2016 IOC and Integra Underground PA 08_0101 Mod 6 - Approved to correct an administrative 31 December 2035 error which unintentionally altered the previously 21 December 2016 approved mine plan for the project Mod 7 - Construct a water pipeline from Integra 15 September 2017 Underground to the Mount Owen Complex Mod 8 - Realignment of main headings, extension of approved longwalls, development of up to three additional longwalls to the northwest in the 16 April 2018 Middle Liddell Seam and changes to ancillary surface infrastructure and water management
3.2 Leases
The leases outlined in Table 7 are applicable to the operations at Integra Underground.
Table 7 Integra Underground Leases
Title Date Granted Expiry ML 1437 28 April 1999 27 March 2032 ML 1518 14 June 2004 27 March 2032 ML 1525 (shaft) 18 November 2002 17 November 2023 ML 1551 10 January 2006 27 March 2032 ML 1676 5 June 2013 4 January 2026 CL 382 12 November 1991 11 November 2033
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3.3 Licences
3.3.1 Environment Protection Licence
Integra Underground operates under EPL 3390, with an anniversary date of 31 August.
No variations have occurred during the 2018 reporting period.
3.3.2 Surface Water Licences
Integra Underground currently holds the surface water licences detailed in Table 8.
Table 8 Integra Underground Surface Water Licences
Licence No Work Approval Date Granted Expiry Share Water Source Hunter Regulated WAL 484 3 River - any part of 20CA200060 Glennies Creek WAL 485 99 WAL 960 20WA201234 50 1 July 2004 Perpetuity WAL 961 20WA201236 150 Hunter Regulated River - Zone 3A of WAL 1172 3 Glennies Creek WAL 1173 20CA201763 303 WAL 1242 13
3.3.3 Groundwater Licences
Integra Underground currently holds the groundwater licences outlined in Table 9.
Table 9 Integra Underground Groundwater Licences
Licence No. Date Granted Expiry Allocation (ML) Type of Works 20BL169862 4 August 2015 25 September 2020 450 20BL169864 Bore - Groundwater extraction for 20BL172505 dewatering purpose 20 May 2011 19 May 2021 500 20BL172506 20BL167917 15 August 2000 20BL169571 20BL169573 7 March 2005 20BL169574 20BL171707 Perpetuity - Monitoring Bore 20BL171708 17 August 2007 20BL171710 20BL171813 3 April 2008 20BL171870 15 May 2008
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Licence No. Date Granted Expiry Allocation (ML) Type of Works 20BL172277 20BL172278 15 September 2009 Perpetuity - Monitoring Bore 20BL172279
3.3.4 Sewerage Management
Integra Underground has approval to operate a system of sewage management under OSSM Approval Number 3969/2008. This approval was granted 25 January 2012. The approval was renewed on 1 July 2018 through to 30 June 2019. The approval will be renewed by Council after 30 June each year, unless Council becomes aware of problems with the operation of the on-site sewage management system requiring adjustment of approval conditions or prevention of system use.
3.4 Other Approvals
3.4.1 Mining Operations Plan
In November 2016, Glencore made a decision to recommence operations at Integra Underground. Integra Underground submitted a MOP to the RR in November 2016 which covered activities for the period 1 January 2017 to 31 December 2018. The MOP was approved on 30 November 2016, prior to commencement of first workings in February 2017. A new MOP was submitted to the RR in November 2018 following the approval of Mod 8 with a new completion date of 31 December 2023. This MOP was approved 19 November 2018.
3.4.2 Extraction Plan
The Integra Underground Longwalls 13 and 14 Extraction Plan (EP) was prepared to seek approval for secondary extraction within these panels. The EP was prepared in accordance with Schedule 3, Condition 20 of PA 08_0101 and was submitted to the DPE on 27 January 2017. Conditional approval was granted on 6 April 2017, and following response to DPE comments by Integra Underground on 6 June 2017, full approval was received from the DPE on the 11 August 2017. Integra Underground Longwalls 15 and 16 Extraction Plan (EP) is expected to be completed and issued to DPE in early-2019.
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4 Operations during the Reporting Period 4.1 Mining Operations
Integra Underground completed secondary extraction of Longwall 13 in July 2018 and Longwall 14 commenced in early September 2018. Development of first workings for Longwalls 15 and 16 continued in 2018, with secondary extraction of Longwall 15 due to commence in late July 2019. Coal extraction during 2018 has been shown in Figure 3.
All ROM coal is sent to Rix’s Creek North for processing, therefore tailings/rejects are not relevant to Integra Underground. The 2018 production summary is presented in Table 10.
Table 10 Production Summary
2017 2018 2019 Approved reporting reporting 2018 MOP reporting Material Limit (PA period period Prediction* period 08_0101) (actual) (actual) (forecast) Waste Rock/ Overburden (bcm) N/A N/A N/A N/A N/A ROM Coal (t) 4,500,000 1,266,000 2,219,076 2,300,000 2,960,403 Reject Material (Tailings) (t) N/A N/A N/A N/A N/A Saleable product (t) N/A 789,000 1,453,451 1,500,000 1,987,775 *2018 MOP Predictions have been taken from the previous MOP (dated November 2016) as this provided a full year of predictions. The MOP updated in November 2018 only contains predictions for November and December 2018.
An application for Mod 8 to PA 08_0101 and accompanying Environmental Assessment was lodged with the DPE in November 2017 with approval granted by DPE on 16 April 2018. As such, the MOP was updated in 2018 which included projecting the increase forecast ROM and product coal tonnes.
4.2 Exploration
The following exploration was completed in 2018 and is shown on Figure 3.
Table 11 Exploration Summary 2018
Hole Number Drilled Depth (m) Start Date Completed DH320A 492.39 29 January 2018 2 February 2018 DH323 700.19 7 December 2017 23 January 2018 DH323A 709.29 7 February 2018 16 February 2018 DH324 502.13 14 December 2017 10 January 2018 DH325 486.15 8 February 2018 19 February 2018 DH326 598.08 21 February 2018 16 March 2018 DH327 567.19 28 February 2018 15 March 2018 DH328 546.90 27 March 2018 17 April 2018 DH329 478.00 19 April 2018 21 May 2018
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4.3 Other Operations
4.3.1 Coal Processing
All ROM coal was stockpiled by Integra Underground before being hauled along internal haul roads by Bloomfield operations to Rix’s Creek North (owned by Bloomfield) CHPP for processing.
4.3.2 Construction
Additional gas drainage infrastructure was also constructed in 2018. 17 gas wells were drilled and approximately 2.21 kilometres (km) of gas drainage pipeline was installed to drain high concentrations of methane from the goaf to allow safe mining.
4.3.3 Mobile Plant and Equipment
The equipment used in 2018 was consistent with 2017 and approved operations, with the majority of equipment used underground. Table 12 details the type and quantity of vehicles used for operations at Integra Underground.
Table 12 Integra Underground Mobile Plant and Equipment
Equipment Type Number Routinely in Operation Function Personnel transporters 12 Personnel movement Load haul dump (LHD/FBL) 8, 2 x B Heading drive Materials movement Grader 1 Underground road maintenance Continuous miner 3 Mine development Shuttle car 4 Mine development Bobcat 1 Underground belt cleaning Surface forklift 2 Surface and stores Longwall unit 1 Coal production Light Vehicles 8 Surface transportation
4.3.4 Land Subdivision & Ownership Transfers
In February 2017, HVCC submitted an application to subdivide a parcel of land currently owned by HVCC. The proposed subdivision is intended to allocate land parcels for underground (HVCC) and open cut (Bloomfield) coal mining operations, respectively.
The three land parcels relevant to the proposed subdivision include: • Lot 710 in Deposited Plan (DP) 624852; • Lot 1 DP in DP 1083482; and • Lot 791 in DP 580967 (eastern and western portions).
The subdivision was approved, and subsequent subdivision certificate issued from Singleton Council in 2018.
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4.4 Next Reporting Period
4.4.1 Mining
Integra Underground will undertake the following mining activities during 2019: • Longwall development within the Middle Liddell Seam using continuous miners; • Longwall mining within the Middle Liddell seam in Longwalls 14 and 15; • Extraction of a maximum 4.5 Mtpa of ROM coal; • Subsidence monitoring and remediation as per the approved Integra Underground Extraction Plan Longwalls 13 and 14, and the Extraction Plan to be submitted for Longwalls 15 and 16 (subject to approval); • Storage of ROM coal at the pit top. Haulage of ROM coal to Rix’s Creek North; • Processing of coal from Integra Underground is undertaken by Bloomfield Collieries in the Rix’s Creek North CHPP; • Operation of workshop and administration areas; and • Construction of mine infrastructure, including services and ventilation facilities as detailed in Section 4.4.3.
4.4.2 Exploration
Table 13 details the planned exploration for 2019.
In conjunction with the approval of Mod 8, the Exploration Activities and Surface Infrastructure Management Plan was revised, submitted to DPE and approved in September 2018.
Table 13 Exploration 2019
Site ID Easting Northing Estimated Depth (m) EXP01 323480.54 6409635.27 390 EXP02 322920.33 6410845.42 485 EXP03 322737.85 6409510.24 460 EXP04 322430.21 6410026.10 500 EXP05 323122.09 6408933.77 410 EXP06 322369.54 6408151.04 410 EXP07 322511.42 6408946.02 440 EXP08 323867.17 6408765.83 350 EXP09 323415.71 6408209.86 370 EXP10 322806.81 6407776.20 380 EXP11 321668.99 6408792.66 440 EXP12 320945.91 6411912.93 580 EXP13 321080.00 6410854.64 520
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4.4.3 Construction
Gas drainage construction works are anticipated to be undertaken in 2019. Four additional goaf wells (16 in total) will be installed for Longwall 14, and 13 goaf wells will be installed for Longwall 15 to extract gas from the goaf in order to facilitate production. Ventilation works will also need to be completed in the next reporting period. A new ventilation and services facility (Ventilation Shaft 3) is required to provide adequate ventilation and services to the underground mining operation. This new facility will be located above the main headings and near Longwall 16, with construction is expected to commence in 2019.
Construction of an 11 kV powerline from the Forest Road Ventilation Site to the new ventilation shaft overlying the North Mains will be undertaken in 2019. An additional 11 kV powerline may be constructed from this substation to the Goaf Dewatering Site and surface auxiliary fans if required. Construction of a new store (approximately 40 m x 20 m) at the Main Surface Facilities, along with the additional access road off Middle Falbrook Road, is expected to commence in 2019. This will also require the relocation of the effluent spray irrigation system to an alternative location, however the current sewage treatment plant will not be relocated.
Works associated with the car park extension at Integra Underground Mine Infrastructure Area are due to commence in 2019.
Three gas wells are scheduled to be decommissioned and rehabilitated in 2019. In addition, a building near the administration area will be demolished. A new office demountable building will be used at the administration area, replacing the building being demolished.
4.4.4 Land Subdivision & Ownership Transfers Land subject to the 2018 subdivision has been transferred from Integra to Bloomfield in February 2019.
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5 Actions Required from Previous Annual Review 5.1 2017 Annual Review
Following the submission of the 2017 Annual Review, the DPE responded on 3 May 2018 requesting additional information. The revised Annual Review was then submitted to the DPE on 1 June 2018. A letter was received from the DPE on 28 August 2018 confirming acceptance of the amended 2017 Annual Review.
The RR did not provide any feedback in response to the 2017 Annual Review.
While all comments received from DPE were addressed and the revised 2017 Annual Review approved, SLR has also addressed the feedback within this Annual Review. Table 14 outlines feedback and where the information has been addressed in this report.
Table 14 DPE Actions Required from 2017 Annual Review
Comment Section Addressed
Air Quality – please provide additional information relating to predictions from the EIS and current modification being undertaken and how site performance Sections 6.2 compared against these predictions, as per the Department’s request following the 2016 Annual Review.
Surface Water – Table 31 is labelled as ‘Surface Water Monitoring Results – TSS and TDS’, however the data presented is pH Results and EC Results. Please revise Sections 7.5 this table to include TSS and TDS data.
5.2 2018 Annual Review
Following the submission of the 2018 Annual Review, the Department of Planning, Industry & Environment (DPIE) responded on 1 July 2019 requesting additional information. The revised Annual Review (this document) is due to be submitted to DPIE by 30th July 2019 as required. Table 15 outlines feedback and where the information has been addressed in this amended report.
Table 15 DPIE Actions Required from 2018 Annual Review
Comment Section(s) Addressed Analysis of monitoring results – in accordance with Schedule 5, Condition 11 (b), and Section 6 of the Department’s Annual Review Guideline (2015), analysis of Sections 6.1, 6.3, 6.7, the current Annual Review period monitoring results should be extended to 6.10, 7.1, and 8.6. include comparison to previous years’ results for trend analysis (where appropriate and not already provided).
24 Hour PM10 exceedances – Table 19 details multiple exceedances of the 24hr PM10 criterion at all monitoring points. Please provide additional detail Appendix A regarding calculation methodology for determining Integra Underground Mine’s contribution to the overall level for each exceedance instance. TSP annual average exceedances – Table 20 details an exceedance of the annual TSP criterion at TSP 1. Please provide additional detail regarding calculation Appendix B methodology for determining Integra Underground Mine’s contribution to the overall level.
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6 Environmental Performance
This chapter provides a summary of environmental monitoring and management undertaken during the 2018 report period. In accordance with the Post Approval Requirements for State Significant Mining Developments – Annual Review Guideline (NSW Government 2015) this report contains a summary of environmental monitoring data where it is required to explain trends or environmental performance during the report period.
6.1 Meteorology
The Glendell Meteorological Station was operated in accordance with Schedule 3, Condition 16 of PA 08_0101. The weather station records rainfall, relative humidity, wind speed, wind direction and sigma theta at 10 minute intervals and temperature at two minute intervals. The data is transferred by a telemetry link to the weather display and is used to evaluate weather conditions. The weather station achieved good data recovery during the reporting period with no malfunctions for the measured parameters. A summary of conditions recorded in 2018 in provided in Table 16.
Table 16 Summary of 2018 Data from Glendell Meteorological Station
Humidity Rainfall Temperature (°C) * Wind Speed (m/s) Date (%) (mm) Min Av. Max Av. Max Av. Total January 10.3 26.6 43.2 2.8 13.7 60.8 16.2 February 12.1 23.9 40.8 2.9 11.3 64.7 61.8 March 9.2 22.5 39.1 3.0 10.9 73.3 91.6 April 8.3 20.2 35 2.2 14.2 72.0 24.4 May 2.9 14.4 28 2.0 13.6 69.3 7 June 1.1 11.6 20.2 1.9 13.2 78.4 41.2 July -1.5 11.8 25.1 3.1 15.0 61.3 1.8 August 0.6 12.5 24.7 3.2 12.9 60.4 33.2 September 2.3 15.4 32.4 2.1 12.9 66.0 22.4 October 4.8 18.5 35.6 2.6 17.7 73.9 49 November 8.4 21.3 38.4 3.1 15.7 61.9 76.4 December 10.8 24.4 40.3 2.3 17.0 65.9 80.2 * Excludes temperature recordings on 25/03/18, 26/04/18, 4/05/18, 7/05/18, 14/05/18 and 18/10/18 which are expected to be associated with equipment malfunctions.
6.1.1 Rainfall
A total of 505.2 mm of rainfall was recorded during 2018. This is a decrease of 27.2 mm from the 532.4 mm recorded during 2017. Monthly rainfall totals did not exceed 100 mm on any occasion during the reporting period, compared with one occasion in 2017. Figure 4 provides a comparison of monthly rainfall in 2017 and 2018.
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Figure 4 Rainfall (mm)
6.1.2 Temperature
Figure 5 illustrates the monthly maximum and minimum temperatures for 2017 and 2018. Results show similar trends across the two year period. The maximum temperature in 2018 was 43.2°C, observed in January. This is a decrease from the last reporting period, which had a maximum observed temperature of 48.3°C in February 2017. The minimum temperature in 2018 was -1.5°C, observed in July. This minimum temperature was only slightly lower than 2017, where a low of -1.2°C was observed.
Figure 5 Monthly Temperature
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6.1.3 Wind Speed and Direction
The wind distribution pattern during the reporting period shows winds generally follow a north‐west to south‐ east axis, with some winds also coming from the south and north. Maximum wind speed in 2018 was 17.7 m/s, recorded during October. These wind distribution patterns are consistent with observations in 2017, and are typical of the Hunter Valley region. Annual wind rose data is shown in Figure 6.
Figure 6 Annual Wind Rose
6.2 Air Quality
The Air Quality and Greenhouse Gas Management Plan is one of a series of environmental management plans that together form the Environmental Management System (EMS) for the Integra Underground. A copy of the latest Air Quality and Greenhouse Gas Management Plan is available on the Integra Underground website, which was updated in September 2018.
Air quality in the vicinity of Integra Underground’s operations is managed via a combination of: • Ambient air quality monitoring; • Meteorological monitoring; and • Site management measures.
Air quality monitoring is currently being conducted at the locations identified in Figure 7 and includes: • Three Tapered Element Oscillating Microbalance (TEOM) continuous air quality monitors that measure the concentration of particulate matter less than ten microns in diameter (PM10); • Seven Depositional Dust Gauges used for monitoring of larger dust particles (typically >50µm); and
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• One High Volume Air Sampler (HVAS) that monitors Total Suspended Particulates (TSP) over a 24 hour period every sixth day.
Condition 12 of PA 08_0101 stipulates the criteria for PM10, TSP and deposited dust, as presented in Table 17.
Table 17 PA 08_0101 Air Quality Criteria
Pollutant Criterion * Averaging Period 90 µg/m3 (Cumulative impact - increase in concentrations due to the TSP Annual project plus background concentrations due to all other sources) 50 µg/m3 (Incremental impact - incremental increase in 24-hour concentrations due to the project on its own) PM10 30 µg/m3 (Cumulative impact - increase in concentrations due to the Annual project plus background concentrations due to all other sources) 4 g/m2/month (Cumulative impact - increase in concentrations due to Annual the project plus background concentrations due to all other sources) Deposited Dust 2 g/m2/month (Incremental impact - incremental increase in Annual concentrations due to the project on its own) *Excludes extraordinary events such as bushfires, prescribed burning, dust storms, sea fog, fire incidents, illegal activities or any other activity which has been endorsed by the EPA and then agreed to by the Secretary.
Management and Mitigation Measures
Management measures include: • Using a water cart and/or water sprays to minimise wind-blown and traffic-generated dust. The water cart is prioritised to areas of highest dust generation potential, which is based on visual inspections; • Prior to the commencement of longwall operations (secondary extraction), the location and operation of water sprays are reviewed and water sprays implemented where deemed necessary to control dust emissions from the underground mine; • All haul roads have edges clearly defined with marker posts or equivalent to control their locations, especially when crossing large overburden emplacement areas; • Obsolete roads are ripped and re-vegetated; • Development of minor roads is limited and the locations of these is clearly defined; • Minor roads used regularly for access etc. are watered/treated to control dust; and • Due to Work Health and Safety (WHS) regulations regarding underground air quality, dust generated underground is minimised through the application of water and/or use of dust suppressants.
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318000 319000 320000 321000 322000 323000 324000 325000 326000 327000 328000
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Sheet Size : A4 Air Quality Monitoring Locations www.slrconsulting.com PH: 02 4037 3200 FIGURE 7
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6.2.1 Environmental Monitoring Results
Depositional Dust Gauges
Depositional dust gauge data collected during the reporting period is available on the Integra Underground website, and is summarised in Table 18. The data presented is corrected for contamination of samples (by bird droppings or insects), and presents annual average deposition rate of insoluble solids as g/m2/month.
Table 18 Depositional Dust Gauges
Current Insoluble 2017 Insoluble No. of Samples No. of Valid Consent Criteria Gauge Matter Deposited Matter Deposited 2 Collected Samples 2 2 (g/m /month) (g/m /month) (g/m /month) IDG1 11* 11 3.9 3.9 IDG2 12 12 3.1 2.7 IDG3 12 11 2.1 1.8 IDG4 12 10 2.4 2.4 4.0 IDG5 12 11 1.9 2.0 IDG6 12 11 2.6 2.2 IDG7 12 11 3.9 2.7 *No sample was collected in July 2018 due to a bottle breakage.
During 2018, the annual average depositional dust results remained below the 4 g/m2/month criteria at all monitoring locations. This is consistent with the previous 2017 results, which were also all below 4 g/m2/month, with results ranging from 1.8 – 3.9 g/m2/month between gauges.
TEOM (PM10)
TEOM results for PM10 concentrations are available on the Integra Underground website, and are summarised in Tables 19 and 20.
Table 19 TEOM Monitoring Results – Annual Averages
No. Samples Current Annual Previous (2017) Annual 3 Gauge 3 3 Consent Criteria (µg/m ) Collected Average (µg/m ) Average (µg/m ) TEOM 1* 251 29.14 26.6 TEOM 2 361 25.57 19.8 30 TEOM 3 364 22.32 20.2 TEOM 4 364 29.43 23.7 * TEOM 1 was removed from the Air Quality and Greenhouse Gas Management Plan in September 2018. Monitoring at this site ceased 10 September 2018.
As shown in Table 19, there were no exceedances of the 30 µg/m3 annual average criteria which was consistent with the previous reporting period. The highest reading was recorded as 210 µg/m3 during November 2018 when an extraordinary regional weather event occurred. This reading is 105.7 µg/m3 higher than the 2017 highest reading of 104.3 µg/m3.
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Table 20 TEOM Monitoring Results – 24 Hour Averages and Number of Exceedances
Previous number of 24 Hour Average Current Number of 3 Gauge 3 days exceeding criteria Consent Criteria (µg/m ) (µg/m ) days exceeding criteria (2017) TEOM 1* 29.14 34 26 TEOM 2 25.57 27 5 50 TEOM 3 22.32 12 2 TEOM 4 29.43 37 6 * TEOM 1 was removed from the Air Quality and Greenhouse Gas Management Plan in September 2018. Monitoring at this site ceased 10 September 2018.
As shown in Table 20, there were numerous exceedances of the 24 hour average criteria for TEOMs during 2018 across all four gauges. The number of exceedances was greater than in 2017, with 71 more exceedances in 2018 compared to 2017. Exceedances have been investigated further in Appendix A.
Integra Underground investigations have concluded that in all cases the monitoring results were not attributed to Integra Underground operations. This is based on the dominant wind direction during the monitoring period and minimal surface activities being carried out by Integra Underground upwind of monitoring locations during the reporting period. Moreover, numerous accounts of nearby bushfires and regional dust storm events during 2018 also contributed to regional air quality. Accordingly, Integra Underground were compliant with Schedule 3, Condition 12 of PA 08_0101.
HVAS (TSP)
HVAS results for TSP concentrations are available on the Integra Underground website, and are summarised in Table 21.
Table 21 HVAS Monitoring Results – Annual Average
Current Annual Average Previous (2017) Annual 3 Monitoring Point 3 3 Consent Criteria (µg/m ) (µg/m ) Average (µg/m )
HVAS - TSP 1 114.9 88 90
HVAS – TSP 2 77.9 73* 90 * Total Suspended Particulates (TSP) results for TSP 2 in 2017 was measured in December only
During the reporting period, the annual average at TSP 1 exceeded the criteria of 90 µg/m3. There were numerous events during the reporting period where higher TSP records contributed to the exceedance of the annual average criteria. Meteorological data at the time of these events were reporting predominantly from directions upwind of Integra Underground. Integra Underground considers its operations did not contribute to these higher levels. Daily exceedances that would have contributed to this high annual average have been investigated further in Appendix B.
Monitoring at TSP 1 will cease in accordance with the changes to the Air Quality and Greenhouse Gas Management Plan and monitoring of a new site known as TSP 2 has commenced. This new site is considered to be more representative of Integra Underground operations. Currently, TSP 1 is closer to the mine and as such would be overestimating air quality impacts from Integra Underground.
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6.2.2 Comparison with Predictions
Integra Underground operates in close proximity to a number of mining operations including: Ashton Coal, Rix’s Creek North, Rix’s Creek and the Mount Owen Complex which are potential sources of additional atmospheric emissions. Other potential sources of emissions in the locality include road and rail vehicle movements, vehicle exhaust emissions, windblown dust from exposed soils, bushfires and agricultural activities.
The predictions made in the 2009 Air Quality Assessment (AQA) (ERM), Mod 2 Air Quality Impact Assessment (AQIA) (PAE Holmes 2012) and the 2017 Air Quality and Greenhouse Gas Assessment (AQGGA) prepared by Jacobs as part of Mod 8 to PA 08_0101, have been assessed against air quality monitoring results for the reporting period. It should also be noted that the predictions made in the AQA and the AQIA were based on operations occurring at the Integra Complex at the time (i.e. both open cut and underground operations).
The 2009 AQA predicts the concentrations of depositional dust, PM10 and TSP for multiple scenarios. Scenario 4 was chosen as it represents Year 8 of operations i.e. 2017, which was the most representative scenario for 2018 operations. Table 22 outlines the predictions made in the AQA (ERM 2009) and the results for the 2018 reporting period.
Table 22 Comparison of 2018 Air Quality Data Against the Predictions
Sites 2009 Predictions (Scenario 4) 2018 Actual Depositional Dust (g/m2/month) IDG1 3.9 IDG2 3.1 IDG3 2.1 IDG4 5 2.4 IDG5 1.9 IDG6 2.6 IDG7 3.9 3 PM10 (µg/m ) TEOM 1* 28.51 TEOM 2 25.57 58 TEOM 3 22.32 TEOM 4 29.43 TSP (µg/m3) HVAS - TSP 1 119 114.9 * TEOM 1 was removed from the Air Quality and Greenhouse Gas Management Plan in September 2018. Monitoring at this site ceased 10 September 2018.
As shown in Table 22, during 2018 the particulate emission predictions made in the AQA (ERM 2009) were much higher than results recorded during the reporting period in most instances. HVAS results for TSP 1 (114.9 µg/m3) were similar to predictions; however this was still below predicted levels (119 µg/m3).
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The AQIA (PAE Holmes 2012) was prepared to support the application for PA 08_0101 Mod 2. This assessed the impact of the Western Extension (approved and commenced under PA 08_0102 for IOC) and the Integra Complex. The AQIA predicted the impacts of dust deposition, TSP and PM10 on 171 sensitive receptors during years 3, 4 and 6 of operations. During 2018 all depositional dust results were within annual average criteria.
The AQGGA predicts the total mass of emissions based on assumed emission rates from different operational activities, such as transport of coal via conveyor, operation of dozers etc. These predictions were made to identify key operational activities that contribute to particulate emissions and whether Mod 8 was likely to increase the mine’s air quality impacts. Jacobs (2017) state that historical and current monitoring data shows that air quality concentrations are at acceptable levels. The AQGGA concluded that “the modification would not cause any adverse air quality impacts”.
Air quality impacts for the mine are measured in terms of particulate concentrations rather than total mass. A direct comparison between the annual particulate emissions predicted in the AQGGA and air quality results recorded during the reporting period is not feasible.
6.2.3 Comparison with Long Term Data
As outlined in Sections 2 and 3, in November 2016 Glencore made a decision to recommence operations at Integra Underground with first workings recommencing in February 2017. Therefore site data from prior to 2017 can assist in showing the difference in environmental performance between when the site was in care and maintenance and Glencore operational.
Site TSP2 – Middle Fallbrook was sampled for PM10 concentrations between April 2006 and January 2018, with the results shown in Table 23. Sampling of TSP at TSP2 – Middle Fallbrook commenced from December 2017 (until present).
3 Annual averages for PM10 concentrations at TSP2 – Middle Fallbrook ranged from 17.8µg/m in 2016 to 24.9µg/m3 in 2017. 2007 and 2008 saw similar results to 2018, recording 24.2 and 24.0 annual averages respectively. Besides 2015 and 2016, most annual results ranged from 20.1 µg/m3 to 24.9µg/m3.
High maximum results can be the outcome of external sources including long periods of drought or bushfires. 2018 data included January samples only and being a summer month, external causes such as heat, dry weather and bushfires increased dust levels.
Table 23 Long term annual PM10 concentrations recorded at TSP2 – Middle Fallbrook (2006-2018)
Minimum annual Maximum annual Average annual PM10 Current Consent Year 3 3 3 3 PM10 (µg/m ) PM10 (µg/m ) (µg/m ) Criteria (µg/m ) 2006* 4.0 63.0 20.1 2007 2.0 103.0 24.2 2008 1.0 79.0 24.0 2009 2.0 61.0 22.4 2010 2.0 68.0 21.0 30 2011 4.0 65.0 20.2 2012 3.0 94.0 23.0 2013 3.0 68.0 21.7 2014 4.0 49.0 20.5
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Minimum annual Maximum annual Average annual PM10 Current Consent Year 3 3 3 3 PM10 (µg/m ) PM10 (µg/m ) (µg/m ) Criteria (µg/m ) 2015 1.0 55.0 19.3 2016 1.0 48.0 17.8 30 2017 1.0 90.0 24.9 January 2018 only* 18.0 46.0 35.8 * Data was analysed between April 2006 and January 2018, inclusive
6.2.4 Key Performance and/or Management Issues
The Air Quality and Greenhouse Gas Management Plan was revised during 2018. The Plan concluded that across 2017 and 2018, Integra Underground investigated high recorded levels at TEOM 1 and TSP 1, and identified these levels to not be attributable to Integra Underground. TEOM 1 and TSP 1 are located to the north east of Integra Underground operations and not within the range of prevailing winds. Subsequently, Integra Underground reviewed the air quality monitoring network in 2018 be more representative of Integra Underground operations. This review included the removal of TEOM 1 from 10 September 2018. The review also indicated that TSP 1 should be removed and TSP 2 should be added to the air quality monitoring network.
There were no complaints relating to air quality in 2018.
6.2.5 Proposed Actions for 2019
Integra Underground will continue to manage air quality in accordance with the Air Quality and Greenhouse Gas Management Plan. Monitoring of a new site known as TSP 2 will commence in 2019, this will replace site TSP 1.
6.3 Noise
The current Noise Management Plan was approved during the 2018 reporting period. The Noise Management Plan details the general controls implemented at Integra Underground to minimise noise emissions and establishes a noise monitoring program to assess noise impacts on surrounding sensitive receivers. A copy of the Noise Management Plan is available on the Integra Underground website.
Noise monitoring consists of both attended and unattended monitoring to meet the requirements of PA 08_0101 and EPL 3390. Monitoring includes: • Quarterly night-time attended monitoring to assess compliance with regulatory limits; and • Real-time unattended monitoring stations at the nearby Mount Owen Complex (MOC) which surrounds the Integra Underground operations. Integra Underground access this data to supplement the attended noise monitoring program.
The noise monitoring locations are illustrated in Figure 8.
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Noise Assessment Group Criteria
PA 08_0101 and EPL 3390 noise assessment group (NAG) criteria are provided in Table 24. NAGs 1 to 10 represent the noise monitoring locations for attended noise monitoring undertaken on a quarterly basis at Integra Underground. Noise emissions from Integra Underground must not exceed the project specific noise criteria at any residence on privately owned land or on more than 25 percent of any privately owned land.
Table 24 Project Specific Noise Criteria (dB (A))
Sleep Day Evening Night Location Disturbance LAeq(15 minute) LAeq(15 minute) LAeq(15 minute) LA1(1minute) NAG 1* All privately-owned land 38 38 36 46 NAG 2* All privately-owned land 39 39 37 47 87 42 42 42 49 NAG 3 106 39 39 39 49 All other privately-owned land 40 40 39 49 88, 91, 95, 99, 100, 105, 161 35 35 35 47 NAG 4 All other privately-owned land 42 42 37 47 111 37 37 37 52 112 36 36 36 52 118 39 39 39 52 NAG 5 154 36 36 36 52 103, 104, 121, 139 35 35 35 48 All other privately-owned land 50 46 42 52 132, 133, 137 35 35 35 48 NAG 6 All other privately-owned land 41 41 38 48 110 38 38 38 49 NAG 7 All other privately-owned land 41 41 38 48 142 35 35 35 45 NAG 8* All other privately-owned land 42 42 35 45 2, 3, 4, 143, 144, 145, 146, 35 35 35 48 NAG 9* 147, 148, 149, 150, 151, 152 All other privately-owned land 40 40 38 48 10 42 42 42 47 9 41 41 41 47 11, 13 40 40 40 47 NAG 10* 8 38 38 38 47 6 36 36 36 47 5 35 35 35 47 *These sites are not included as a noise limit locations within the EPL, however they are included as noise limit locations within PA 08_0101.
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Cumulative Noise Criteria
PA 08_0101 cumulative criteria for privately owned land are outlined in Table 25.
Table 25 Cumulative Noise Criteria ((dB (A) LAeq (period))
Location Day Evening Night NAGs 4, 5, 8 and 9 55 45 40 All other privately - owned land 50 45 40
Integra Underground implements all reasonable and feasible mitigation measures to ensure that noise emissions from its operations and other surrounding mines do not exceed the criteria at any residence on privately owned-land or on more of 25 percent of any privately owned-land.
Management and Mitigation Measures
In addition to conducting noise monitoring, Integra Underground implements a number of mitigation measures to minimise potential noise impact on nearby receivers, and to comply with the conditions of consent. Mitigation measures are completed as per the Noise Management Plan and include: • Most operations are below the ground surface or in the portal; • Significant distance between residences and ventilation fan sites; • Controlling mine noise at the source through the use of equipment with appropriate sound attenuation fitted, where practical; • Where noise attenuation requires maintenance, or a plant item is evidently in need of maintenance, this is reported to the maintenance team and the plant item either removed from service or its use restricted and monitored until the required maintenance is complete; • Sound power level testing upon procurement of relevant plant and equipment, and annual sound power level testing to ensure ongoing compliance with relevant sound power level specifications; • Restricting operations where possible in elevated/out of portal areas, especially during the night time and adverse meteorological conditions; • Where practicable, evening and night-time surface operations will be restricted to areas that support a minimisation of mine contributed noise at privately owned residences surrounding Integra Underground; • Using broadband reversing alarms on mine equipment, light vehicles and contract vehicles; and • Conducting noise management training with relevant personnel to enforce the importance of noise mitigation.
6.3.1 Environmental Monitoring Results
Attended noise monitoring was undertaken on a quarterly basis in accordance with PA 08_0101. The quarterly monitoring results are shown in Table 26. These results were the same as the previous reporting period.
Operator attended noise monitoring has shown that Integra Underground operations were inaudible throughout all monitoring periods, demonstrating compliance with criteria in Table 25.
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Table 26 Attended Noise Monitoring Results
LAeq (15minute) LA1 (1minute)
Location Integra Underground Contribution Integra Underground Contribution Criteria Criteria Q11 Q21 Q31 Q41 Q11 Q21 Q31 Q41
2 NAG 1 36 0 02 02 28 46 02 02 02 35
2 2 NAG 3 39 02 02 02 0 49 02 02 02 0
NAG 4 35 02 02 02 30 47 02 02 02 30
NAG 5 35 02 02 02 30 52 02 02 02 30
2 2 NAG 6 35 02 02 02 0 48 02 02 02 0
2 2 NAG 7 38 02 02 02 0 48 02 02 02 0
2 2 NAG 8 35 02 02 02 0 45 02 02 02 0
2 2 NAG 9 35 02 02 02 0 48 02 02 02 0
2 2 NAG 10 35 02 02 02 0 47 02 02 02 0 1 Estimated Integra Underground contribution, as assessed by the operator during the monitoring session 2 Not audible
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6.3.2 Comparison with Predictions
A comprehensive review of background noise levels in the region was undertaken as part of the Noise Impact Assessment (EMM 2012) prepared to support the application for PA 08_0101 Mod 2. This review was undertaken to assess cumulative noise from neighbouring operations including Rix’s Creek, Glennies Creek, Glendell, Mount Owen, Camberwell and Ravensworth East Mines, and the influence of the Main Northern Rail Line and the New England Highway on the ambient noise environment. The Noise Impact Assessment also assessed the impact of the operational changes associated with the approved Western Extension and the Integra Complex. Further to this, an acoustics report was prepared to support the Integra Underground Mod 8 Environmental Assessment (Bridges, 2017).
During 2018, the results of the quarterly noise monitoring recorded inaudible results for all locations, with the exception of NAG 1, NAG 4 and NAG 5 in Quarter 4. Integra Underground contributions to noise were below the criteria at these three locations. Approved criteria for the site was developed using past noise impact assessments, therefore Integra Underground being below criteria (or inaudible) suggests that the site is below noise predictions.
These results are consistent with the previous reporting period where all quarterly noise monitoring recorded inaudible results.
6.3.3 Key Performance and/or Management Issues
There were no key performance or management issues regarding noise during 2018.
6.3.4 Proposed Actions for 2019
Due to higher amount of construction proposed in 2019, monthly attended noise monitoring will be undertaken during the construction phase. Actual measures levels will be assessed against the “noise affected level” of 40 LAeq 15 minute as prescribed by the Interim Construction Noise Guideline (DECC, 2009) rather than against the predicted noise levels.
6.4 Biodiversity
Biodiversity is managed in accordance with the Biodiversity Management Plan which was updated and approved in September 2018. A copy of the Biodiversity Management Plan is available on the Integra Underground website.
6.4.1 Environmental Monitoring Results
The Biodiversity Management Plan committed to the collection of baseline ecological data within the surface area of Longwalls 13 and 14 to statistically test for impacts from subsidence. In 2017, SLR Consulting (SLR) completed the baseline monitoring using plot and transect surveys in the mapped vegetation communities within the predicted zone of subsidence, in accordance with the BioBanking Assessment Methodology (BBAM) (OEH 2014).
During the 2017 baseline monitoring survey two reference and three control sites were established. The control sites were selected by Integra Underground and are located outside of the predicted subsidence zone (including previously mined panels) but within the study area. The data collected from the reference sites has allowed the vegetation in the plots within the subsidence zone and vegetation outside of the impact zone to be compared as mining progresses. Field data for monitoring event 1 was sampled on 22 October 2018 and are provided below.
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Vegetation Types
The study area has been considerably disturbed due to land clearing and grazing activities and as such, most of the study area is cleared of native vegetation. Notwithstanding this fact, a total of seven native plant communities were identified within the study area during the field survey. These communities are as follows: • Central Hunter Ironbark-Spotted Gum-Grey Box Forest; • Central Hunter Bulloak Forest; • Central Hunter Swamp Oak Forest; • Hunter Valley River Oak Forest; • Grassland; • Regenerating Native Woodland/Shrubland; and • Revegetation.
Of the above listed vegetation types, three were verified as present within the monitoring plots established for this study: 1. Central Hunter Ironbark-Spotted Gum-Grey Box Forest; 2. Central Hunter Bulloak Forest; and 3. Grassland.
The identified vegetation communities and their conservation status under the Biodiversity Conservation Act 2016 (BC Act) and the Environment Protection and Biodiversity Conservation Act 1999 (EPBC Act) are listed in Table 27.
Table 27 Vegetation Types Recorded at Monitoring Sites
Vegetation Type Regional Significance BC Act Status EPBC Act Status Central Hunter Ironbark-Spotted Gum- High Endangered Critically endangered Grey Box Forest (planted and regrowth) Central Hunter Bull Oak Forest None Not listed Not listed Modified Grassland None Not listed Not listed
BioBanking Vegetation Assessment
The results of BBAM surveys are summarised below: • Both control sites contain higher species richness when compared to the impact sites of the respective PCT (with the exception of BO2 which was slightly lower). In comparison to the baseline survey the species richness in both the control and impact sites has decreased, suggesting that the decline has been exemplified by climatic or other conditions, rather than just longwall mining. • The canopy cover data recorded during monitoring event 1 varied in comparison to the baseline monitoring. Most sites showed slight increases in canopy cover. • Native mid‐storey cover was absent at all monitoring sites. • Native ground cover (shrubs) was absent at all monitoring sites and only a very low cover of shrub species was recorded in a few of the 20 m X 20 m plots.
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• The cover native grasses have declined in sites SG01, B01, B02 and G01 since the baseline survey. The only site showing an increase in native grasses was SG02. The decline in native grass cover could be attributed to both the drier climate conditions and the increasing percentage of canopy cover. • The cover of non‐grass species (i.e. ‘native groundcover (other)’) has decreased significantly at all sites since the baseline monitoring event. • Exotic plant cover has decreased at most sites, with the exception of B01, where it has increased by 6%. • The total length of fallen logs has increased at all sites, with 33 m of fallen logs in SG02 and 22 m in B02. Impact site SG01 contains 33.5 m of fallen logs and impact site B01 now contains 28 m of fallen logs after no fallen logs had been recorded during the baseline survey. The increase in the total length of fallen logs may be due to the placement of felled trees or fallen logs from other areas into the monitoring sites, as was recommended by the baseline report. • No hollow bearing trees were recorded within any of the monitoring sites.
The results presented in the Longwall 13 and Longwall 14 Biodiversity Monitoring Report 1 demonstrate a change in the data collected from baseline monitoring in May 2017 and the data collected during monitoring event 1 in November 2018. There is generally a lower abundance and diversity of groundcovers at all sites, which could be attributed to the difference in the season of the survey, the consistency of the canopy and the drier conditions during the time period between the baseline monitoring and monitoring event 1. The grassland monitoring site (G01) contains a mix of native and exotic pasture grasses, forbs and herbs, which is typical for grazing land within the Hunter Valley region. Due to the climate conditions and seasonal difference it is unclear whether the decrease in the abundance and diversity of flora at the monitoring locations can be attributed to mining impacts (SLR 2019).
6.4.2 Key Performance and/or Management Issues
There were no issues with biodiversity during 2018.
6.4.3 Proposed Actions for 2019
There are no specific proposed actions for 2019 in regards to Biodiversity.
6.5 Aboriginal Heritage
The management of Aboriginal heritage in 2018 was undertaken in accordance with the Aboriginal Heritage Management Plan (AHMP). A copy of the AHMP is available on the Integra Underground website.
6.5.1 Environmental Monitoring Results
An Aboriginal and Historic Heritage Impact Assessment was undertaken by OzArk in November 2017 to support the application for PA 08_0101 Mod 8, which sought approval to continue longwall mining of the Middle Liddell Seam further to the north of the previously approved longwall panels, as well as the construction and operation of ancillary surface infrastructure required to support the proposed mining activities. The impact assessment discovered five valid sites are located within the Assessment Boundary. The locations of all five sites were visited during the assessment and while surface artefacts were not visible at any of the site locations, all sites are regarded as remaining extant within the landscape (OzArk, 2017).
In efforts to preserve these sites, Integra Underground managed these areas in accordance with the AHMP. The protection measures implemented included:
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• Works were sited to avoid areas of cultural heritage significance, where possible; • Temporary fencing was installed throughout the duration of disturbance works in the immediate area; • An archaeologist was present during disturbance works in creeks; and • Signage was installed at these locations identifying the sites as an area of significance. Aboriginal Cultural Heritage Monitoring was undertaken by OzArk in May 2018 (OzArk, 2018). In summary, 18 sites, out of a total of 24, located in quadrant 4 were inspected: • Site IF1: it was recommended that a sign be erected at the site as it could be at risk of being driven over. If the paddock has cattle in it, consideration of the suitability of a sign that could be knocked over should be made. • Sites GCS9 and GCS-10: OzArk believes that Integra Underground have self-reported the potential impact to these sites through the track maintenance works that occurred prior to Glencore purchasing Integra Underground. The progress and/or results of this self-reporting process should be investigated to determine whether the site has been listed as ‘destroyed’ with AHIMS. Certainly from the results of the monitoring inspection it would appear that the site has been impacted by the track maintenance works. • Sites GCM2, GCM3 and GCM4: were never registered for reasons unknown, and due to the fact that there were no visible artefacts at the site, it is recommended that this site be removed from the Mount Owen Complex and Integra Underground GIS databases. There is no further requirement to conserve the location of this site. It was concluded that the rest of the site required no immediate maintenance (OzArk, 2018).
6.5.2 Key Performance and/or Management Issues
An Aboriginal Cultural Heritage Working Group meeting was held on 26 April 2018 with representatives from Integra Underground, Mount Owen Complex and Wanaruah Local Aboriginal Lands Council. Items discussed at this meeting were an overview of current Integra Underground Operations, Project Approval and AHMP, quarterly monitoring results, Mount Owen Continued Operations commitments, Proposed Mount Owen Continued Operations Modification 2, and the Glendell Continued Operation Project.
6.5.3 Proposed Actions for 2019
There are no specific proposed actions for 2019 in regards to Aboriginal Heritage.
6.6 Historical Heritage
Historical heritage is managed at Integra Underground in accordance with the Historical Heritage Management Plan (HHMP). A copy of the HHMP is available on the Integra Underground website, which was updated and effective from September 2018. The HHMP states that no additional historical heritage sites/items have been identified within the Integra Underground project approval area during the heritage assessment completed for Mod 8. It is not anticipated that Integra Underground’s mining operations will have any impact on the remaining historical heritage sites identified within the Integra Underground project area, and the potential for historical archaeological items to be present is considered to be very low, therefore, no specific monitoring measures are required.
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In November 2018, Umwelt completed a Heritage Assessment of the two buildings proposed for removal in the Integra Underground Pit Top Area. The heritage assessment of the ‘Oak Park School House’ and ‘Residence’ was required to assess potential heritage significance and to determine whether or not they can be demolished in accordance with PA 08_0101. It was concluded that the ‘Residence’ can be removed without further assessment or investigation, in accordance with PA 08_0101, Historic Heritage Management Plan and Mining Operations Plan. Moreover, it was determined that although the removal of the ‘Oak Park School House’ is permissible under PA 08_0101, Historic Heritage Management Plan and Mining Operations Plan, it has been assessed to be of potential value to the local community in terms of its historic, social and associative values. If removal is pursued in the future, it is recommended that a complete archival recording is undertaken (Umwelt, 2018).
6.6.1 Unexpected Finds Protocol
An Unexpected Finds Protocol is outlined in the HHMP in the event that an unexpected find is encountered during surface disturbance activities in the future.
6.6.2 Key Performance and/or Management Issues
There were no issues or unexpected finds relating to historical heritage during 2018.
6.6.3 Proposed Actions for 2019
There are no specific proposed actions for 2019 in regards to Historic Heritage.
6.7 Waste
The current waste management program utilises licensed waste contractors to incorporate recycling, in addition to the disposal of wastes in accordance with the waste provisions of the Protection of the Environment Operations (Waste) Regulation 2014.
6.7.1 Environmental Monitoring Results
There were no changes to the waste management system at Integra Underground during the reporting period. In accordance with Schedule 3, Condition 36 of PA 08_0101, Integra Underground are required to minimise and monitor waste generated by the operation and ensure that waste generated by Integra Underground is appropriately stored, handled and disposed. Table 28 outlines the volumes of waste disposed of or recycled during the report period.
Table 28 Summary of Waste 2018
Previous Current Previous Tonnes Waste Current Tonnes Percentage (%) Percentage (%) (2017) (2017) Total waste disposed offsite to 398.86 36.84 378.84 45.75 landfill Total waste recycled 683.85 63.16 449.29 54.25 Total waste generated onsite 1082.71 100 828.13 100
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6.7.2 Sewerage Treatment
The Integra Underground has an on‐site sewage treatment system (OSSM Approval Number 3969/2008), which includes a primary aeration tank with a secondary maturation pond and a package sewage treatment plant. Wastewater from the system is dispersed by irrigation sprays on dedicated irrigation areas.
As required by Condition M2.2 of EPL 3390, monitoring was undertaken of the sewage waste for pH and faecal coliforms. Sewage monitoring and maintenance has been undertaken on quarterly basis and relevant approvals have been retained.
6.7.3 Key Performance and/or Management Issues
There were no issues or complaints relating to waste during 2018.
6.7.4 Proposed Actions for 2019
Integra Underground will continue to monitor waste quantities and sewage waste parameters throughout 2019.
6.8 Weed and Pests
6.8.1 Environmental Monitoring Results
During 2018, Enright Land Management conducted weed control works on the Integra Underground mining lease and production areas, targeting biosecurity priority weeds and environmental weeds. A 2018 Completed Weed Works Report (Enright Land Management 2018) was prepared to provide information on the weed works carried out on site, the locations of the works and an indication of the weed areas treated. Of particular note, observation was made on Acacia Saligna (also known as Golden Wreath Wattle) which is classed as a Serious Environmental Weed and falls under General Biosecurity Duty regulations in all of NSW. The approximate infestation area treated was 2.2 hectares (plus individual trees) with areas of high infestation treated on the rehabilitation areas bordering Rix’s Creek Mine. The main method of treatment has been cut and paint (Glyphosate) which can be used all year round. Basal bark spraying has been carried out on some young growth. Acacia Saligna has a relatively strong presence in areas with disturbed soil on site. Monitoring and follow up may be required for regrowth or seed germination.
Additionally, Enright Land Management also carried out the vertebrate pest management works across areas shared by Integra Underground and MOC, including the ‘Autumn 1080 Wild Dog & Fox Baiting Program’ and ‘Spring 1080 Wild Dog & Fox Baiting Program’.
The Property Inspection Report completed in December 2018 identified 29 weed species to be controlled by Integra Underground in accordance with the Biosecurity Act 2015 No. 24. Out of the 29 species, 12 were deemed high priority, eight as medium priority and nine as low priority. The Weed and Pest Annual Management Plan details an annual treatment plan for the ongoing management of noxious weeds.
Additionally, six feral animal species including deer, cat, pigs, foxes, rabbits and wild dogs were identified at the properties and mine operation areas. The Property Inspection Report recommends range of actions, including open range shooting, baiting, trapping and fumigation, for the management of feral animals.
6.8.2 Key Performance and/or Management Issues
There were no issues relating to weeds and pests during 2018.
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6.8.3 Proposed Actions for 2019
Weed and pests will be monitored and managed during 2019 as per the recommendations in the Property Inspection Report.
6.9 Bushfire
Bushfire management is undertaken in accordance with the Bushfire Management Plan which has been prepared to assess and manage bushfire risks on site. The Bushfire Management Plan details prevention and management measures to reduce the impact of bushfire, if it was to occur at Integra Underground. These include:
Fuel Management • All fuel is stored within defined storages which meet Australian Standards and are regularly maintained; • Providing asset protection zones around vulnerable assets to minimise the impact of fire i.e. pit top, stockpiles, ventilation fans, gas wells and flares; • All fuel tanks on-site are fully or self bunded to ensure that in the event of a leak or rupture, no fuel escapes from the bunded area. Each bunded area has the capacity of at least 110% of the largest tank; • Refuelling is completed within designated fuel bays or within cleared areas; and • Reduce fuel loads within the strategic fire management zones and the land management zones.
Mobile Equipment and Operations • Regular maintenance and housekeeping by mine management; • All workshops and offices have appropriate firefighting equipment and their location is indicated by signs in accordance with Australian Standards; • Slashing or clearing is not permitted during total fire bans days as defined by the NSW Rural Fire Service; • Equipment is not stored on uncleared ground; • Fire response equipment is available onsite and properly maintained; and • Vehicular access is maintained around all areas of mining-related activities.
6.9.1 Key Performance and/or Management Issues
In 2018, tree clearing was completed around fan sites and powerlines in accordance with the sites Bushfire Management Plan. There was one bushfire recorded between Ashton and Glendell Coal Mines, approximately 2.5km from the Integra Underground Mine Infrastructure Area.
6.9.2 Proposed Actions for 2019
Integra Underground will review bushfire management procedures in 2019.
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6.10 Greenhouse Gas
Greenhouse gas management is undertaken in accordance with the Air Quality and Greenhouse Gas Management Plan. A copy of the plan is available on the Integra Underground website, which was updated and effective from September 2018. Annual emissions and abatement strategies are reported as part of the internal environmental reporting and National Greenhouse and Energy Reporting (NGER) obligations.
The methane emitted from Integra Underground is discharged via goaf gas drainage boreholes to either EDL’s Power Station or the flare site on Forest Road, and through mine ventilation. A number of goaf gas drainage boreholes are connected to the EDL Power Station, which utilises the methane to generate electricity for distribution in the NSW power grid. Integra Underground record the methane sent to the EDL Power Station on a monthly basis with the annual total reported in Table 29.
Additionally, energy efficiency opportunities and greenhouse gas management strategies are implemented at Integra Underground in accordance with Section 3.2 of the Air Quality and Greenhouse Gas Management Plan.
6.10.1 Environmental Monitoring Results
Greenhouse gas emissions for Integra Underground during the reporting period, as well as the previous reporting period (for comparison), are shown in Table 29. The emissions have been estimated using the methods specified in the former Department of the Environment, Water, Heritage and the Arts (DEWHA) (now Department of the Environment and Energy) National Greenhouse and Energy Reporting (Measurement) Determination 2008 and the publication, National Greenhouse Accounts Factors July 2018.
Table 29 Greenhouse Gas Data
Emission Source 2018 Quantity (t CO2-e) 2017 Quantity (t CO2-e) Electricity consumption (grid) 36,101 23,544 Fuel Combustion (diesel) 2,604 1,628 Fugitive emissions from ROM coal 37,724 21,524 Sub-total 76,427 46,969 Vented 514,618 379,383 Flared 67,009 2,739 Sent Offsite 41,198 342,247 Power Generation 0 0 Sub-total 622,825 724,369 Total 699,252 771,338
6.10.2 Comparison with Predictions
An Air Quality and Greenhouse Gas Assessment was prepared by Jacobs (2017) as a component of the Mod 8 Environmental Assessment. Jacobs (2017) predicted that total greenhouse gas emissions from Integra Underground would be 878,493 tCO2-e. As outlined in Table 29, total emissions during 2018 were only 699,252 tCO2-e which is an improvement upon the predicted emissions.
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6.10.3 Key Performance and/or Management Issues
There were no issues relating to greenhouse gas emissions during 2018.
6.10.4 Proposed Actions for 2019
There are no specific proposed actions for 2019 in regards to Greenhouse Gas.
6.11 Hydrocarbon Management
Bulk fuel facilities are managed in accordance with AS1940-2004 The Storage and Handling of Flammable and Combustible Liquids. All permanent fuel facilities are fully bunded, with emergency measures in place to manage any minor spills.
Hydrocarbon spills which occur are reported via the site’s incident reporting system and investigations carried out as required. When spills occur they are managed with spill kits available onsite or treated through oil- water separators.
6.11.1 Environmental Monitoring Results
During the reporting period seven hydrocarbon spills occurred and were all reported internally. All spill incidents were managed in accordance with the Spill Response Procedure in the Emergency Response Manual.
6.11.2 Key Performance and/or Management Issues
There were no key performance and/or management issues relating to hydrocarbon management in 2018.
6.11.3 Proposed Actions for 2019
Integra Underground will continue to prevent hydrocarbon spills in 2019 as well as respond to and investigate any spills which may occur to prevent recurrence.
6.12 Public Safety
Public safety is managed in accordance with the Longwalls 13 and 14 Public Safety Management Plan.
Integra Underground is committed to preventing risks to public safety resulting from operations at the mine. Ongoing reviews of potential public safety issues are undertaken on a regular basis around the mine area and associated public roads.
Day-to-day monitoring of public safety at Integra Underground is undertaken through the use of a variety of methods, including: • All site visitors are directed to the main office and are required to report and log on to an electronic visitors book; • Implementation of a security system to ensure public and employee safety is maintained in accordance with the relevant requirements under the , Work Health and Safety (Mines and Petroleum Sites) Act 2013, Work Health and Safety (Mines and Petroleum Sites) Regulation 2014, Mining Act 1992 and the mining tenements;
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• Signage advising of subsidence areas; • Security fencing surround the perimeter of the pit top and surface infrastructure; • Security patrols; and • Employee and contractor inductions regarding mine safety and environmental management issues prior to commencement of work at the site.
6.12.1 Environmental Monitoring Results
General public safety monitoring is undertaken as part of the weekly subsidence inspections.
6.12.2 Key Performance and/or Management Issues
There were no public safety incidents, performance or management issues in 2018.
6.12.3 Proposed Actions for 2019
A new Extraction Plan will be submitted to the DPE in 2019. This Extraction Plan will seek approval to undertake secondary extraction within Longwalls 15 and 16. This will include a Longwall 15 and 16 Public Safety Management Plan.
6.13 Subsidence
Subsidence is managed in accordance with the Longwalls 13 and 14 Extraction Plan, which is available on the Integra Underground website. The Longwalls 13 and 14 Subsidence Monitoring Program was prepared as a component of the Extraction Plan and details the ongoing monitoring program to manage subsidence. This includes: • Weekly inspections within the subsidence impact zone; • Bi-monthly subsidence impact reporting; and • Six-monthly reporting with a comprehensive summary of all impacts and environmental monitoring results.
6.13.1 Environmental Monitoring Results
SCT Operations (SCT) was engaged to review and analyse the Longwall 13 subsidence monitoring data (undertaken bimonthly during the 2018 reporting period, as well as a six monthly review from December 2017 to May 2018 and June 2018 to November 2018). SCT (2018) states that the main subsidence impact observed from mining Longwall 13 to date is minor cracking of the surface over the panel and near the panel edges. Some minor cracking near the start of Longwall 14 was also observed (SCT 2019). Impacts to the MOC Railway Line/Bettys Creek bridges and associated infrastructure are being effectively managed to avoid operating restrictions and maintain these built features in a safe and serviceable condition.
SCT (2018 & 2019) concluded: • The subsidence impacts observed are expected to be compliant with the subsidence performance measures outlined in Schedule 3, Condition 17 of PA 08_0101, notwithstanding the input of other specialists; and • The subsidence effects and impacts, observed and expected, are likely to be compliant with the performance indicators within the management plans for the Extraction Plan.
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6.13.2 Comparison with Predictions
A Subsidence Impact Assessment was undertaken by SCT (2017) to support the Longwalls 13 and 14 Extraction Plan. The assessment predicted the proposed extraction would be compliant with the subsidence performance measures in Schedule 3, Condition 17 of PA 08_0101.
The maximum vertical subsidence measured is less than 0.7 m, tilt is less than 5 mm/m and strains are less than 4 mm/m in tension and 4 mm/m in compression. This compares to forecast values of 1.4 m for subsidence, 14 mm/m for tilt and 7 mm/m and 10 mm/m for tensile and compressive strain respectively (SCT 2018).
Table 30 shows that measured values of the primary subsidence parameters – vertical subsidence, tilt and strains – are less than conventional subsidence forecast in SCT (2017) for the Longwalls 13 and 14 Extraction Plan. The lower than forecast subsidence applies to natural ground surfaces and areas of disturbed ground with waste rock fill material.
Table 30 Comparison of Subsidence Parameters: Forecast and Measured
Tensile Compressive Subsidence (m) Tilt (mm/m) Strain (mm/m) Strain (mm/m) Forecast Maximum 1.4 14 7 10 Measured Maximum <0.7 <5 <4 <4
The subsidence measured over Longwall 13 is expected to increase as Longwall 14 is mined and other subsidence parameters may also increase.
The subsidence parameters measured over Longwall 13 are also partly a result of the mining height being lower than the maximum used to forecast subsidence effects in SCT (2017).
Subsidence behaviour and impacts observed in the vicinity of Longwall 13 are consistent with expectations outlined in the Longwalls 13 and 14 Extraction Plan at the completion of Longwall 13 and less than those presented in SCT (2017).
SCT (2018) states the only subsidence impact observed is minor cracking of the surface near the panel edge of Longwall 13. SCT (2019) state that some minor cracking near the start of Longwall 14 was also observed. The position and magnitude of this cracking is consistent with predictions. The impacts observed are consistent with predictions by SCT (2017).
6.13.3 Key Performance and/or Management Issues
Minor subsidence cracking was identified during 2018, however this did not cause any potential impacts to public safety or the environment.
6.13.4 Proposed Actions for 2019
An Extraction Plan will be prepared for Longwall 15 and 16 in 2019.
The subsidence cracking identified above Longwall 13 will be rehabilitated in 2019.
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7 Water Management
Integra Underground operates a water management system which includes underground mine dewatering systems, mine water storages, sediment dams and dirty water collection drains, and mine water pumping and pipeline systems.
Integra Underground is situated within the catchments of Glennies Creek, Main Creek and Bettys Creek. Glennies Creek flows to the south where it discharges into the Hunter River, while Bettys Creek flows to Bowmans Creek, which similarly flows to the south before discharging into the Hunter River.
The Integra Underground water management system adopts a water management approach categorising water into three classes and managing each via a segregated system. The three categories of water are: • Clean water: − Runoff from areas undisturbed by mining activities, established rehabilitation or local water sources (creeks, rivers or alluvial aquifers). • Dirty water: − Runoff from unestablished rehabilitation and disturbed areas (hardstand, laydown areas and unsealed roads). • Mine water − Runoff from haul roads, rehabilitated overburden dumps, workshop areas, vehicle wash-down bays and storage yards; and − Dewatering of underground workings.
An important aspect of the Integra Underground water management system is the water sharing agreement in place with Bloomfield (operators of Rix’s Creek North) and the MOC. Construction of a water transfer pipeline from Integra Underground to MOC was completed during the last reporting period. The pipeline transfers mine water from Integra Underground to the MOC.
During the reporting period, water management was undertaken in accordance with the Integra Complex Water Management Plan (prepared by Vale and covering Integra Underground and IOC) and the Integra Underground Water Management Plan. The Integra Underground Water Management Plan was approved in September 2018 and is available on the Integra Underground website. Water monitoring sites and extent of alluvium at Integra Underground are shown on Figure 9.
In accordance with Section 9.1 of the Integra Complex WMP (2014) and Section 8.1.3 of the Integra Underground WMP (2018), a review of surface water and groundwater monitoring data for this Annual Review was conducted. An Annual Groundwater Report will be completed and submitted to relevant stakeholders.
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7.1 Water Balance
The mine water management system at Integra Underground achieves a net neutral water balance through integrated water management practices with the neighbouring open cut mining operation at Rix’s Creek North, and the Integra Underground to MOC mine water pipeline which operates under the Greater Ravensworth Area Water Sharing Scheme.
Mine water associated with Integra Underground is generated from: • Dewatering of underground workings; • Rainfall runoff from the Portal Sump, administration and laydown areas (via overflows from Process Dams); and • Seepage from former overburden dump (Rix’s Creek North).
Integra Underground engaged Engeny Water Management (Engeny) to review the site water balance for the reporting period (1 January 2018 – 31 December 2018), using the existing GoldSim model. The 2018 water balance, along with the previous 2017 balance for comparison, is presented in Table 31.
Table 31 Water Balance 2018
Aspect 2018 Volume (ML) 2017 Volume (ML) Inputs Imported clean water for operational use 341.2 220.2 Imported portable water 11.8 7.8 Groundwater ingress 148.0 -* Dewatering from Integra Underground workings 225.8 225.8 Seepage into Portal Sump from Rix’s Creek North 539.0 110.3 overburden emplacement Rainfall‐runoff 64.6 134.5 Total Inputs 1,104.6 698.57 Outputs Operational uses (dust suppression etc.) 27.8 18.3 Evaporation 23.8 69.0 Potable water use 11.8 7.8 Transfers to Rix’s Creek Mine 14.0 507.8 Transfers to Mount Owen Complex 957.1 69.3 Total Output 1,102.5 672.17 Inflow – Outflow 2.1 26.5 Recorded Volume Stored on Site at start of 40.2 34.84 Annual Review period Recorded Volume Stored on Site at end of 39.3 59.17 Annual Review period Recorded Change in Storage 0.9 24.32 Error <1% <1% *Was not reported separately in 2017 Annual Review - this was included in ‘Dewatering from Integra Underground workings.
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7.2 Water Take
Water taken by Integra Underground during the previous water year (1 July 2017 to 30 June 2018) has been summarised in Table 32.
Table 32 Water Take 2017 – 2018
Water sharing plan, source and management zone Allocation Water Licence # Entitlement (ML) (as applicable) Used (ML) Waterways WAL 484 Hunter Regulated River - any part of Glennies Creek 3 0 WAL 485 Hunter Regulated River - Zone 3A of Glennies Creek 99 0 WAL 960 Hunter Regulated River - Zone 3A of Glennies Creek 50 0 WAL 961 Hunter Regulated River - Zone 3A of Glennies Creek 150 0 WAL 1172 Hunter Regulated River - Zone 3A of Glennies Creek 3 0 WAL 1173 Hunter Regulated River - Zone 3A of Glennies Creek 303 238.1 WAL 1242 Hunter Regulated River - Zone 3A of Glennies Creek 13 0 Groundwater 20BL169862 Bore: Sydney Basin - Hunter Porous Rock Aquifer 450 20BL169864 148.0 20BL172505 Bore: Sydney Basin - Hunter Porous Rock Aquifer 500 20BL172506
7.3 Changes to Licences
There were no changes to licences during the reporting period.
7.4 Discharges
Integra Underground is a closed system and there are no discharges of water offsite.
7.5 Surface Water
7.5.1 Environmental Monitoring Results
Surface water quality was monitored onsite at Integra Underground and in the surrounding waterways during the reporting period. Surface water monitoring locations are shown on Figure 9 and comprise nine sites which are sampled monthly for pH, Electrical Conductivity (EC), total suspended solids (TSS) and total dissolved solids (TDS). Sampling of Bettys Creek and Main Creek is also completed on a quarterly basis.
The pH and EC monitoring results for the reporting period have been summarised in Table 33.
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Table 33 Surface Water Monitoring Results – pH and EC
pH Results EC Results (µS/cm) Monitoring Location Lower Upper Min Ave Max Min Ave Max Criteria Criteria Criteria Monthly Monitoring Sites GCSW01 Process Dam 7.9 8.3 8.8 - - 244 322 425 - GCSW02 Portal Sump 7.9 8.3 8.7 - - 5,540 7,153 8,470 - GCSW06 Sewerage Pond 7.2 7.7 8.8 - - 381 486 587 - GCSW07 Potable Water Supply 7.6 7.8 8.1 - - 244 267 329 - GCSW08 Runoff Pond 7.6 8.2 9.3 - - 343 446 610 - GCSW09 Vent Shaft Dam * ------GC1 Glennies Creek 7.7 7.9 8.2 7.61 7.9 250 301 410 555 GC2/W4 Nobles Crossing 7.8 7.9 8.2 7.5 7.9 251 305 422 4662 GC3 Glennies Creek 7.7 7.9 8.3 7.61 7.9 251 306 427 5192 Quarterly Monitoring Sites BC1 Bettys Creek * ------540 (flow) BC2 Bettys Creek * ------6,350 BC3 Bettys Creek * ------(no 6.9 - 7.8 (flow) flow) 6.9 - 8.1 (no flow) 680 (flow) MC3 Main Creek (Quarterly) 7.2 7.2 7.2 314 314 314 1,220 (no flow) * Dry during all sampling events 1 Previous lower criteria 7.5 (2017 Water Management Plan, effective up to September 2018) 2 Previous criteria 555 (2017 Water Management Plan, effective up to September 2018)
Limits were reached for pH trigger levels at GC1 Glennies Creek in March, April and May; GC2/W4 Nobles Crossing in April; and GC3 Glennies Creek in January, March and April. All EC results were under the listed criteria. In accordance with the Water Management Plan, investigations were undertaken in response to these pH limits. The majority of results were within the criteria range for all locations specified in the Water Management Plan. pH levels outside of trigger levels were investigated by Integra Underground. The monitoring results were within historic pH ranges which have been observed since February 2009. Additionally, the locations of these monitoring points are outside the predicted subsidence impact zone. It is considered that these results are not attributable to Integra Underground.
Total dissolved solids (TDS) and total suspended solids (TSS) were sampled at the locations summarised in Table 34. In accordance with the Water Management Plan, these locations are monitored to align with the requirements of Suite 2 (GCSW01) which requires the monitoring of TDS, and Suite 7 which requires the monitoring of TDS and TSS.
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Table 34 Surface Water Monitoring Results – TSS and TDS
TSS Results (mg/L) TDS Results (mg/L) Monitoring Location Min Ave Max Criteria Min Ave Max Criteria Monthly Monitoring Sites GCSW01 Process Dam NR NR NR NR 129 195 294 - GC1 Glennies Creek <5 30.33 78 133 159 182 - GC2/W4 Nobles Crossing <5 10.33 14 50** 133 170 196 - GC3 Glennies Creek <5 9.11 16 133 178 243 - Quarterly Monitoring Sites BC1 Bettys Creek* ------BC2 Bettys Creek* - - - 50** - - - - BC3 Bettys Creek* ------MC3 Main Creek 63 63 63 50** 292 292 292 - * Dry during all sampling events **ANZECC (2000) Australian and New Zealand Guidelines for Fresh and Marine Water Quality NR: Not required
TSS levels during the reporting period ranged from <5 mg/L to 78 mg/L, with an average of 17 mg/L. TDS levels during the reporting period ranged from 129 mg/L to 294 mg/L, with an average of 184 mg/L. Exceedances of TSS criteria were recorded in February at GC1 Glennies Creek and MC3 Main Creek.
Elevated TSS levels appear to be due to low flow, and higher than average temperatures. Integra Underground will continue to monitor in 2019.
7.5.2 Stream Health and Channel Stability
The results of the annual Bettys Creek diversion channel stability and stream health monitoring indicated that the diversion has not significantly changed from what was observed during the baseline survey, however some evidence of minor erosion progression was observed at some of the monitoring points (SLR, 2018b & 2018c). Some additional erosion was documented in the diversion however it is unlikely that this erosion was caused by subsidence impacts in the area based on observations made during the site inspection.
The diversion stability fluctuated over different sections of the creek and the stream health of the diversion is still very poor (SLR, 2018b & 2018c). The very poor stream health is predominantly a result of the long history of clearing, and weed invasion in the area. Canopy cover (where it exists) is primarily limited to the diversion/creek with adjacent grassland. In addition, debris which can be used as habitat (i.e. leaf litter, standing dead trees, hollow-bearing trees, fallen logs etc.) located around the diversion were minimal. The health of the rehabilitated riparian areas is expected to improve over time as the canopy cover increases provided that stock access and mining impacts to these areas are minimised (SLR, 2018b & 2018c). This anticipated improvement is expected to occur slowly.
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The monitoring identified that some sections of the diversion are currently eroding and are vulnerable to further erosion with areas of significant erosion observed. These areas are generally associated with exposed dispersive sub-soils, which hamper vegetation establishment by the development of a hard surface crust when the soil is dry, and the ‘melting’ nature of the soil when wet. The diversion is generally stable in most areas but some rill/gully erosion is occurring in some areas where the banks are bare (predominately between monitoring points MBD4 and MBD5). A number of cracks running parallel to the diversion were observed near the top of the left bank (looking downstream) in the reach of the diversion between monitoring points MBD2 and MBD4. It is not clear what caused these cracks, however it may have been caused by slumping following construction of the channel or historical subsidence associated with nearby underground mining (SLR, 2018b & 2018c).
7.5.3 Comparison with Predictions
A Surface Water Assessment was undertaken by WRM Water and Environment (2009) as part of the Integra Underground Coal Project EIS. The assessment concluded that “Impacts from the current proposal will be limited to Bettys Creek, Main Creek and their local drainage network. Mine planning has ensured that Glennies Creek and its associated alluvium lie outside the subsidence footprint from the proposed underground mining and hence no surface water impacts are expected” (WRM, 2009).
A Surface Water Assessment was undertaken by Hansen Bailey (2017) to support the Mod 8 Environmental Assessment. This assessment stated that: • The existing monitoring program will be expanded to include the Modification Underground Extraction Area and ancillary infrastructure; • The proponent will undertake routine inspections as necessary to monitor the potential impacts of the Modification; • Additional annual inspection sites will be established in response to any erosion or sediment control issues identified through the routine monitoring program; and • The monitoring program will continue to be reviewed on an annual basis.
The results presented in Tables 32 and 33 support that Integra Underground is not having any impacts upon surface water quality.
7.5.4 Long Term Trend Analysis
Figures 10 and 11 show long-term results for pH and EC, respectively. Although pH and EC levels resulted in some exceedances of criteria, these levels are within the historic pH and EC that has been observed since February 2009 (ERM 2009). The location of all monitoring sites is beyond the limit of predicted subsidence and therefore operations at Integra Underground are not considered a contributing factor to these exceedances.
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Figure 10 Long Term Surface Water pH Results
Figure 11 Long Term Surface Water EC Results
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7.5.5 Key Performance and/or Management Issues
Limits were reached for pH trigger levels at GC1 Glennies Creek in March, April and May, GC2/W4 Nobles Crossing in April and GC3 Glennies Creek in January, March and April. All EC results were under the listed criteria. In accordance with the Water Management Plan, investigations were undertaken in response to these pH limits. The investigations determined that monitoring results at the locations were not attributable to Integra Underground.
TSS levels during the reporting period ranged from <5 mg/L to 78 mg/L, with an average of 17 mg/L. TDS levels during the reporting period ranged from 129 mg/L to 294 mg/L, with an average of 184 mg/L. Exceedances of TSS criteria were recorded in February at GC1 Glennies Creek and MC3 Main Creek. Elevated TSS levels appear to be due to low flow, and higher than average temperatures. Integra Underground will continue to monitor in 2019.
7.5.6 Proposed Actions for 2019
There are no specific proposed actions for 2019 in regards to Surface Water Management.
7.6 Groundwater
7.6.1 Environmental Monitoring Results
Groundwater was monitored onsite at Integra Underground during the reporting period. Groundwater monitoring locations are shown on Figure 9 and comprises of eleven sites which are sampled bimonthly for pH, EC and depth (m). Table 35 summarises the pH, EC and depth monitoring results for the reporting period.
During 2018, trigger limits were reached on the following occasions for pH levels, EC and groundwater level (GL): • 1 February: pH at GCP3S, GCP3D, GCP4D, GCP11; EC at GCP4D, GCP17; GL at GCP3S, GCP4D, GCP9, GCP11, GCP17, GCP18, GCP39 (dry), GCP40; • 9 April: pH at GCP3S, GCP3D, GCP4D; EC at GCP4S, GCP4D, GCP9, GCP17; GL at GCP3S, GCP4D, GCP9, GCP11, GCP17, GCP18, GCP39 (dry), GCP40; • 1 June: pH at GCP4D; EC at GCP3S, GCP4S, GCP4D, GCP9, GCP17; GL at GCP3S, GCP4D, GCP9, GCP11, GCP17, GCP18, GCP39 (dry), GCP40 (dry); • 1 August: pH at GCP4D; EC at GCP3S, GCP4S, GCP4D, GCP9, GCP17; GL at GCP3S, GCP3D, GCP9, GCP11, GCP17, GCP18, GCP39 (dry), GCP40 (dry); • 2 October: pH at GCP4S, GCP4D; EC at GCP3S, GCP4S, GCP4D; GCP9, GCP17; GL at GCP3S, GCP3D, GCP9, GCP11, GCP17, GCP18, GCP39 (dry), GCP40 (dry); • 30 November: pH at GCP3S, GCP18; EC at GCP3S, GCP4D; GCP9, GCP17; GL at GCP3S, GCP3D, GCP4S, GCP9, GCP11, GCP18, GCP39 (dry), GCP40 (dry);
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Table 35 Groundwater Monitoring Results
pH Results EC Results (µS/cm) Groundwater Level (mbgl) Monitoring Lower Upper Lower Upper Lower Upper Location Min Ave Max Min Ave Max Min Ave Max Criteria Criteria Criteria Criteria Criteria Criteria GCP3S 6.7 7.1 7.4 6.9 7.2 15,860 26,523 35,700 14,900 16,200 5.2 5.5 5.7 3.6 4.5 GCP3D 7.1 7.3 7.6 7.3 7.5 9,250 9,647 10,300 5,140 10,700 38.0 39.1 41.1 92.14 # GCP4S 7.3 7.6 8.0 7.3 7.8 9,760 11,256 12,380 7,230 10,200 4.4 4.8 5.4 3.5 4.6 GCP4D 6.6 6.8 7.1 7.0 7.7 15,380 16,822 17,990 4,570 12,900 13.4 15.0 17.2 73.69 # GCP9 6.8 7.0 7.1 6.8 7.1 451 500 540 395 475 5.7 6.0 6.2 4.5 4.2 GCP11 7.0 7.2 7.4 7.1 7.5 3,160 3,233 3,340 1,740 4,510 8.7 9.1 9.4 8.4 9.3 GCP17 6.8 7.0 7.2 6.8 7.0 15,760 16,603 18,100 17,100 18,000 7.7 7.8 7.9 7.3 7.5 GCP18 6.8 6.9 7.4 6.8 7.3 765 796 822 760 1,180 7.9 8.0 8.2 -68.73 # GCP39* - - - 6.0 6.9 - - - 210 4,310 - - - 3.3 4.4 GCP40* - - - 6.6 6.9 - - - 33,000 40,800 - - - 4.6 5.2 DDH224 ------65.7 155.3 233.8 - - * Dry during all sampling events # Coal Measure Maximum Drawdown Level Triggers
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Integra Underground engaged GeoTerra to undertake an investigation of these results during the reporting period. In regards to pH, the report outlined that the exceedances are within the historic ranges of the piezometers since 2006 and none of the TARP pH trigger criteria exceedances are considered significant, and they are not directly due to influences from activities or operations within the Integra Underground (GeoTerra, 2019). In regards to salinity, the report outlined that exceedances are within the historic ranges of the piezometers since 2005 for pH and none of the TARP EC trigger criteria exceedances are considered significant, and are not directly due to influences from activities or operations within the Integra Underground, however, ongoing monitoring results should be observed to assess if the salinisation trend continues (GeoTerra, 2019). In regards to groundwater levels, the technical “exceedances” are within the historic range of the piezometers since January 2002. None of the TARP groundwater level trigger criteria exceedances are considered significant, and are not currently due to influences from recent activities or operations within the Integra Underground, however, ongoing monitoring results should be observed to assess the long term water level trends in association with rainfall (GeoTerra, 2019).
7.6.2 Alluvium Interception
In accordance with Condition 3 of groundwater licences 20BL169862 and 20BL169864, Figure 9 shows the extent of mining activities and the unconsolidated alluvium associated with Glennies Creek, Bettys Creek and Main Creek.
7.6.3 Comparison with Predictions
The Integra Underground Water Management Plan (2018) contains groundwater quality impact assessment criteria. These criteria take the form of site specific trigger values, based on acceptable limits of variation in water level and water quality and have been developed using quarterly groundwater sampling data collected between 2009 and 2016, with reference to the ANZECC/ARMCANZ (2000) guidelines. The trigger levels established in the Water Management Plan are presented in Table 35.
Groundwater levels in the alluvial aquifers generally varied by less than 0.5 m over 2018, with greater levels seen at GCP3D and a drop off of levels seen at GCP4D through the reporting period. Most alluvial piezometers showed slightly higher groundwater levels compared to 2017.
Similarly to 2017, groundwater quality recorded in the alluvial aquifers showed significant variability over 2018, which is likely due to the grab sampling method employed by Integra Underground rather than any real changes in the aquifer water quality. Because of this variability, there were numerous exceedances of relevant water quality trigger values for the alluvial aquifers. However, all 2018 pH monitoring results were within the ANZECC (2000) Guideline ranges for lowland river aquatic ecosystems, as were the full year of EC results at several of the piezometers. Where EC results were in excess of the Guideline values, the results were sufficiently high enough to suggest that groundwater at these locations naturally exceeds the Guideline values.
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7.6.4 Long Term Trend Analysis
Figures 12 to 14 show long-term results for pH, EC and depth, respectively. Although there were multiple exceedances of criteria in 2018 (refer Section 7.6.1), these levels are within the historic ranges of the piezometers (GeoTerra 2019).
Figure 12 Long Term Groundwater pH Results
Figure 13 Long Term Groundwater EC Results
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Figure 14 Long Term Groundwater Level Results
7.6.5 Key Performance and/or Management Issues
There were no groundwater incidents, performance or management issues in 2018. Exceedances are managed as per the Water Management Plan (2018).
7.6.6 Proposed Actions for 2019
There are no specific proposed actions for 2019 in regards to groundwater.
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8 Rehabilitation
Rehabilitation objectives at Integra Underground are in accordance with the approved MOP. Rehabilitation is undertaken progressively as outlined in the Environmental Assessments, PA 08_0101, the approved MOP and the Biodiversity Management Plan. The rehabilitation of the final landform features will be integrated across the underground and surrounding natural landforms.
8.1 Rehabilitation Outcomes and Objectives
Integra Underground is committed to achieving a post mining land use outcome which is safe, stable and sustainable and meets the requirements of key stakeholders. In general and where practicable the final landscape will be returned to as close as possible to the pre‐mining land use configuration. The rehabilitation objectives for the site, is to achieve an agreed post mining land use that is safe, stable, non‐polluting and sustainable.
Regular monitoring of rehabilitated areas is undertaken during the initial vegetation establishment period and beyond to demonstrate that the objectives of the rehabilitation strategy are being achieved, and that a sustainable, stable landform has been created. Depending on the outcomes of the monitoring, rehabilitation maintenance to repair any areas may be undertaken where required. This may include, but not be limited to, the repair of diversion drains and banks, and the reseeding or fertilising of areas that may have failed to establish.
The monitoring results of rehabilitated areas will be compared to the reference sites established as part of the baseline monitoring program to allow a comparison of the development and success of the rehabilitation against remnant vegetation. Reference sites indicate the condition of surrounding undisturbed areas and allow comparisons to be made between the rehabilitated sites and the undisturbed areas.
Additionally, Schedule 3, Condition 38 of PA 08_0101 sets out the rehabilitation objectives for Integra Underground. These are replicated in Table 36.
Table 36 PA 08_0101 Rehabilitation Objectives
Area/Domain Rehabilitation Objective Site (as a whole) Safe, stable and non‐polluting. Surface Infrastructure To be decommissioned and removed, unless DRG agrees otherwise. Restore ecosystem function, including maintaining or establishing self‐sustaining eco‐ Other land affected by the systems comprised of: project • Local native plant species (unless DRG agrees otherwise); and • A landform consistent with the surrounding environment. Glencore Mt Owen Bettys Rehabilitate to the same or better geotechnical, geomorphic and ecological condition as Creek Diversions prior to mining, unless the owner agrees otherwise. Sections of Bettys Creek and Hydraulically and geomorphologically stable, with diverse habitats and ecology. Main Creek to be Diversions Creek Diversions Hydraulically and geomorphologically stable, with diverse habitats and ecology. Repair to pre‐mining condition or equivalent unless: • The owner agrees otherwise; or Built features • The damage is fully restored, repaired or compensated for under the Mine Subsidence Compensation Act 1961.
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Area/Domain Rehabilitation Objective • Ensure public safety; and Community • Minimise the adverse socio‐economic effects associated with mine closure.
8.2 Status of Mining and Rehabilitation
The operational status of mining and rehabilitation is shown in Figure 15. All rehabilitation works were undertaken in accordance with the MOP. A copy of the MOP is found on the Integra Underground website. Currently 10.7 ha of land is under active rehabilitation. A detailed summary of the rehabilitation undertaken at Integra Underground is shown in Table 37.
The increase to total active disturbance in 2018 was associated with the construction and operation of gas drainage wells, with supporting pipelines and access roads.
Table 37 Rehabilitation Status
Previous Reporting This Reporting Period Next Reporting Period Mine Area Type Period (Actual) (Ha) (Actual) (Ha) (Forecast) (Ha) A. Total mine footprint 101.7 111.14 139.44 B. Total active disturbance 91 95.66 128.8 C. Land being prepared for rehabilitation 0.0 0 0 D. Land under active rehabilitation 10.7 8.12 11.2 E. Completed rehabilitation 0.0 0 0
8.3 Comparison against MOP Predictions
During 2018 Integra Underground generally operated in accordance with the approved MOP. A comparison of 2018 rehabilitation against the predictions made in the MOP have been presented in Table 38 and shown in Figure 15.
Table 38 Rehabilitation Progress Compared to MOP Predictions
Total Disturbance Area Total Rehabilitation Area Cumulative Rehabilitation Predicted/Actual (ha) (ha) (per MOP Year) Area (During MOP term) 2018 Data 95.66 0.41 8.12 2018 MOP Predictions 97.8 0 12.6 Note: The MOP was approved on 30 November 2018. This MOP did not include any predictions for rehabilitation in 2018 so a value of 0 ha has been applied as predicted in the former MOP.
As seen in Table 38, Integra Underground did not complete the rehabilitation target in respect to the MOP forecast, with the total cumulative rehabilitation area being less than the MOP prediction. The predicted total disturbance area is slightly higher than predicted in the MOP. Refinements to the site GIS have identified that rehabilitation is less than predicted in the MOP, this will be aligned in future updates to the MOP.
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8.4 Post Rehabilitation Land Use
As outlined in the MOP, Integra Underground is committed to achieving a post mining land use outcome which is safe, stable and sustainable, and meets the requirements of key stakeholders. In general and where practicable the final landscape will be returned to as close as possible to the pre-mining land use configuration.
The majority of mining and pit top infrastructure will be removed, with the majority of the areas rehabilitated to pasture. Only 7.2 ha of rehabilitation will be woodland/pasture. All surface cracks due to subsidence will be identified and remediated appropriately.
8.5 Key Issues that May Affect Rehabilitation
Issues that cannot be predicted but may present risks to Integra Underground rehabilitation include: • Climate change; • Bushfire; • Drought; • Flood; • Dam failure; • Major landform deformation due to geotechnical instability; • Changes to regulatory requirements; • Infestations of destructive species; and/or • Malicious damage.
An event such as those listed above could have substantial consequences for rehabilitation value and are likely to require effective recovery practices to limit the harm, control the risks and to rebuild the rehabilitation to achieve satisfactory performance criteria within a reasonable timeframe to achieve relinquishment. The effect on rehabilitation could occur at any time during the life of mine, during care and maintenance and post closure.
The probability of any of the events listed above occurring are very low based on industry evidence throughout Australia and the exact geo‐political location for Integra Underground. Some events may occur suddenly, such as an act of damage by a vandal whereas other such as the impacts of climate change can be monitored through progressive changes against average weather patterns and the severity of those events. The likelihood of a bushfire affecting the site is cyclical with conditions such as higher risk seasons and increasing fuel loads of vegetation in areas that have dense undergrowth and no grazing or clearing.
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8.6 Rehabilitation Monitoring
8.6.1 2018 Rehabilitation Monitoring Summary
A 2018 Annual Rehabilitation Monitoring Report was prepared by Umwelt (2019). Monitoring was undertaken over four days from 10 December 2018 to 13 December 2018. The program included the assessment of 35 rehabilitated gas well sites (see Photo 1), three pasture analogue sites, two woodland rehabilitation sites and two engineered creek-crossing sites.
Photo 1 Gas Well Rehabilitation Site, LW03_GW01 (Umwelt, 2019)
Three general types of rehabilitation works have been completed across Integra Underground to date. These are: • Woodland rehabilitation areas: these are in the rehabilitation overburden emplacement area (7.2 hectares), which have been reshaped, topsoil applied and seeded/planted with native trees, shrubs and groundcover species. • Gas well rehabilitation sites: former gas well sites would have originally had no greater disturbance size than approximately 20 metres by 20 metres. This area would have included a small actual drill hole, with the remaining area slashed for vehicle and equipment laydown areas. After cessation of the need for the gas well site, these locations were backfilled and left to naturally recover, with some follow-up weed management works. The rehabilitation of these sites aimed for consistency with surrounding vegetation (predominantly cattle grazed grassland).
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• Creek Crossings: these works were across existing natural creek lines and were enhanced to allow the following;
o Main Creek: Integra to Mt Owen Mine Water Pipeline was installed running horizontally to the creek and required excavation
o Bettys Creek: rehabilitation was required for the installation of the Mt Owen Mine Water Pipeline and a gas drainage pipeline.
Rehabilitation monitoring results and subsequent data analysis and interpretation showed that rehabilitation condition across the gas well sites was also variable: • 13 of the 35 monitored sites achieved a satisfactory performance (classified as ‘monitor’ or ‘acceptable’) typically with a satisfactory protective ground cover dominated by desirable and suitable pasture species. Monitoring of the four sites achieving an ‘acceptable’ performance can be temporarily suspended, whilst the monitoring frequency of the nine sites classified as ‘monitor’ can be decreased; • 18 of the 35 gas well sites were assessed as requiring minor maintenance works, typically in relation to required localised weed control; and • Four of the 35 gas well sites had rehabilitation which returned a very poor performance. The establishment of a suitable pasture vegetation community has failed and some sites are showing sunken areas (which will require in-filling). These sites were classified as needing re-work and regular monitoring will need to be continued. These results differed compared with 2017, which saw an additional two sites rated as very poor however six more sites rated as satisfactory. In summary, in 2017: • 19 of the 31 monitored sites achieve a satisfactory performance; • Six of the gas well sites were assessed as requiring minor maintenance works, typically in relation to required localised weed control; and • Six of the 31 gas well sites had rehabilitation which returned a very poor performance.
8.7 Rehabilitation Trials
There were no rehabilitation trials undertaken at Integra Underground during the 2018 Annual Review period.
8.8 Removal of Buildings
There were no buildings removed during 2018.
8.9 Proposed Actions for 2019
Integra Underground propose the following actions during 2019: • Continue additional works recommended in the Rehabilitation Monitoring 2018 report (Umwelt 2019); • Rehabilitation of subsidence cracking from Longwall 13 in accordance with the Extraction Plan (where necessary); and • Re-work and regular monitoring for the four gas well rehabilitation sites that returned a very poor performance in 2018.
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9 Community 9.1 Overview
A number of consultation tools are used at Integra Underground to consult with relevant stakeholders. These include: • A 24‐hour community hotline: this service aims to promptly and effectively address community concerns; • Community Consultative Committee (CCC): the Integra Underground CCC is held with the MOC CCC. This committee currently meets two times per year to discuss environmental management and any matters raised by members on behalf of the community; • Integra Underground website: includes updates on current and future operations, including environmental monitoring results; and • Glencore Greater Ravensworth Area newsletters: these are prepared bi‐annually and circulated to disseminate information on Glencore operations in the area, including Integra Underground.
9.2 Community Consultative Committee
The Integra Underground and MOC CCC comprise of: • Community members; • Representatives of Singleton Council; and • Managers from Mount Owen Mine, Glendell Mine and Integra Underground.
Two CCC meetings were held during the reporting period: • April 2018; and • October 2018.
These meetings provided updates on operations, including mine closure planning, subsidence management, environmental monitoring results, community complaints, environmental incidents, and summaries of rehabilitation activities. CCC meeting minutes are available on the Integra Underground website.
9.3 Community Contributions, Donations and Sponsorship
Integra Underground recommenced the community investment program during 2017, following a period of minimal investments due to Integra Underground being under care and maintenance. Integra Underground is committed to supporting the local community in which it operates. To reflect this commitment, Integra Underground supported the following community initiatives, making donations to the total value of $11,702.85 in 2018: • Movember; • Singleton Town Band – 140th Anniversary Concert (see Photo 2); • Westpac Rescue Helicopter Service – Singleton; and • Rotary Club of Singleton, Men’s Health Education Rural Van (MHERV).
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Photo 2 Singleton Town Band (The Singleton Argus, 2018)
9.4 Community Complaints
No community complaints were received during the 2018 reporting period.
10 Independent Audit
In accordance with Condition 3, Schedule 5 of PA 08_0101, an Independent Environmental Audit is required every three years. An audit was undertaken in 2017 and the audit actions are reported in Table 39, including progress to date. The audit period ranged between 5 December 2014 and 28 November 2017. The next environmental audit will be undertaken in 2020.
WSP (2018) determined there to be five non-compliances and six conditions were not verified. Some of the non-compliances noted in the audit related to the same issue which were duplicated between consent documents and management plans.
A basic risk assessment was conducted for all non-compliances resulting in Low/Medium/High risk levels, as well as administrative non-compliances. Of the five non-compliances, four were administrative non- compliances and one was a low risk. No medium or high risks were identified during the audit.
A copy of the Independent Environmental Audit and action plan to address non-compliances can be viewed on the Integra Underground website.
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Table 39 Non Compliances and Exceedances
Non-compliance Condition/Recommendation Finding Action Progress to date Reference PA 08_0101 Schedule 3, Condition 33 The Proponent must implement the approved DPE was notified in 2017 by management plan as approved from time to Notify NSW OEH of the disturbance to two HVCC/Glencore of the time by the Secretary. (2) AHIMS and the results of the disturbance and results of Schedule 5, Condition 9 investigation into the disturbance of investigation. Schedule 3, AHIMS sites. OEH was notified in Condition 33 & The Proponent must notify the Secretary and Administrative non- February 2018 however no Schedule 5, any other relevant agencies of any incident compliance Revise the Aboriginal Heritage further correspondence has Condition 9 associated with the project as soon as Management Plan to include the practicable after the Proponent becomes aware requirement to notify the OEH with been received. of the incident. Within 7 days of the date of the respect to incidents relating to Aboriginal The Aboriginal Heritage incident, the Proponent must provide the Heritage at the site. Management Plan was Secretary and any relevant agencies with a revised in 2018. detailed report on the incident Within 12 weeks of commencing each audit, or as otherwise agreed by the Secretary, the Proponent must submit a copy of the audit The previous IEA (2014, for Vale) was Schedule 5, report to the Secretary, together with its Administrative non- submitted later than the 12 weeks Not applicable Condition 13 response to any recommendations contained in compliance timeframe. the audit report, and a timetable for the No further action recommended. implementation of any measures proposed to address the recommendations. The Proponent must make copies of the Provide previous Environmental Copies of previous EAs have Schedule 5, following publicly available on its website: Administrative non- Assessments (EAs) for the project as listed been made available on the Condition 14(a) The documents referred to in conditions 2 and 3 compliance in Appendix 2 of PA 08_0101 on the Integra Underground of Schedule 2. project’s web site. website.
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Non-compliance Condition/Recommendation Finding Action Progress to date Reference Except for wind speed at microphone height, the data to be used for Except for wind speed at microphone height, determining meteorological conditions the data to be used for determining Future monitoring reports Appendix 5, Non-Compliance shall be that recorded by the Glendell meteorological conditions shall be that recorded have been amended to Condition 5 weather station (as per condition 16 of by the meteorological station located on the site Risk = Low address this requirement. schedule 3). Amend future Environmental (as required by condition 16 of Schedule 3). Noise Monitoring Reports to address this requirement. CL 383, ML 1437, ML 1518, ML 1525, ML 1551, ML 1676 The 2014 Annual Review prepared by the The lease holder must submit a Compliance previous mine operator (Vale) did not Report to the satisfaction of the Minister. The Administrative non- include a specific compliance statement Condition 4(a) report must be prepared in accordance with any Not applicable compliance with respect to relevant Coal Lease and relevant guidelines or requirements published Mining Leases. by the Minister for compliance reporting. No further action is recommended.
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11 Incidents and Non Compliances 11.1 Air Quality
During the reporting period, the annual average at TSP 1 exceeded the criteria of 90 µg/m3. There were numerous events during the reporting period where higher TSP records contributed to the exceedance of the annual average criteria. Meteorological data at the time of these events were reporting predominantly from directions upwind of Integra Underground. Integra Underground considers its operations did not contribute to these higher levels. HVAS results for TSP 1 (115 114.9 µg/m3) were similar to predictions; however this was still below predicted levels (119 µg/m3).
Monitoring at TSP 1 will cease in accordance with the changes to the Air Quality and Greenhouse Gas Management Plan and monitoring of a new site known as TSP 2 will commence. This new site is considered to be more representative of Integra Underground operations. Currently, TSP 1 is closer to the mine and as such would be overestimating air quality impacts from Integra Underground.
11.2 Groundwater
During 2018, trigger limits were reached on the following occasions for pH levels, EC and groundwater level (GL) as summarised in Table 40.
Table 40 Groundwater Incidents and Non-Compliances in 2018
Date Incident/Non-compliance
1 February 2018 Exceedance in: • pH at GCP3S, GCP3D, GCP4D, GCP11 • EC at GCP4D, GCP17 • GL at GCP3S, GCP4D, GCP9, GCP11, GCP17, GCP18, GCP39 (dry), GCP40; 9 April 2018 Exceedance in: • pH at GCP3S, GCP3D, GCP4D • EC at GCP4S, GCP4D, GCP9, GCP17 • GL at GCP3S, GCP4D, GCP9, GCP11, GCP17, GCP18, GCP39 (dry), GCP40 1 June 2018 Exceedance in: • pH at GCP4D • EC at GCP3S, GCP4S, GCP4D, GCP9, GCP17 • GL at GCP3S, GCP4D, GCP9, GCP11, GCP17, GCP18, GCP39 (dry), GCP40 (dry) 1 August 2018 Exceedance in: • pH at GCP4D • EC at GCP3S, GCP4S, GCP4D, GCP9, GCP17 • GL at GCP3S, GCP3D, GCP9, GCP11, GCP17, GCP18, GCP39 (dry), GCP40 (dry) 2 October 2018 Exceedance in: • pH at GCP4S, GCP4D • EC at GCP3S, GCP4S, GCP4D; GCP9, GCP17 • GL at GCP3S, GCP3D, GCP9, GCP11, GCP17, GCP18, GCP39 (dry), GCP40 (dry)
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Date Incident/Non-compliance
30 November 2018 Exceedance in: • pH at GCP3S, GCP18 • EC at GCP3S, GCP4D, GCP9, GCP17 • GL at GCP3S, GCP3D, GCP4S, GCP9, GCP11, GCP18, GCP39 (dry), GCP40 (dry)
Integra Underground engaged GeoTerra to undertake an investigation of these results during the reporting period. In regards to pH, the report outlined that the exceedances are within the historic ranges of the piezometers since 2006 and none of the TARP pH trigger criteria exceedances are considered significant, and they are not directly due to influences from activities or operations within the Integra Underground (GeoTerra, 2019). In regards to salinity, the report outlined that exceedances are within the historic ranges of the piezometers since 2005 for pH and none of the TARP EC trigger criteria exceedances are considered significant, and are not directly due to influences from activities or operations within the Integra Underground, however, ongoing monitoring results should be observed to assess if the salinisation trend continues (GeoTerra, 2019). In regards to groundwater levels, the technical “exceedances” are within the historic range of the piezometers since January 2002. None of the TARP groundwater level trigger criteria exceedances are considered significant, and are not currently due to influences from recent activities or operations within the Integra Underground, however, ongoing monitoring results should be observed to assess the long term water level trends in association with rainfall (GeoTerra, 2019).
11.3 Administrative Non-Compliance
On the 10 September 2018 an administrative non-compliance was recorded. The Air Quality and Greenhouse Gas Management Plan approved 10 September 2018 indicated that air quality monitoring locations for HVAS (TSP 1) was to be moved to a new site referred to as TSP 2. TSP 1 was monitored for the remainder of 2018. In accordance with the Air Quality and Greenhouse Gas Management Plan monitoring of a new site known as TSP 2 will commence and monitoring at TSP 1 will cease. This new site is considered to be more representative of Integra Underground operations. Currently, TPS 1 is closer to the mine and as such would be overestimating air quality impacts.
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12 Activities to be Completed in the Next Reporting Period
The activities listed in Table 41 have been/will be completed in 2019.
Table 41 Proposed Activities in 2019
Topic Proposed Activity By When Undertake planned exploration program as Exploration Ongoing outlined in Section 4.4.2. Undertake longwall development within the Middle Liddell seam using continuous miners, Longwall mining Ongoing and longwall mining within the Middle Liddell seam in Longwalls 14 and 15. Construction of mine infrastructure, including Construction service and ventilation facilities as outlined in Ongoing Section 4.4.3. Progressive rehabilitation of gas drainage Rehabilitation Ongoing infrastructure. Prepare and submit Longwall 15 and 16 Management Plans July 2019 Extraction Plan.
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13 References
Bridges (2017) Integra Longwall Extension Modification – Acoustics.
EMM (2012) Integra Mine Complex Modification 2 Environmental Assessment.
Enright Land Management (2018) 2018 Completed Weed Works Report.
Geoterra (2018) Discussion on TARP trigger exceedance at Integra Underground.
Hanson Bailey (2017) Integra to Mount Owen Complex Water Pipeline Modification Environmental Assessment.
Integra 2017 Longwalls 13 and 14 Public Safety Management Plan.
NSW Government (2015) Post Approval Requirements for State Significant Mining Developments – Annual Review Guideline
OzArk EHM (2017) Aboriginal Due Diligence Archaeological Assessment, Potential Impacts Associated with Coal Extraction from Longwall 13, Integra Underground Mine, Singleton LGA.
OzArk EHM (2017) Aboriginal Due Diligence Archaeological Assessment, Potential Impacts Associated with Coal Extraction from Longwall 14, Integra Underground Mine, Singleton LGA.
OzArk EHM (2018) Aboriginal Cultural Heritage Monitoring Report, Mount Owen Complex.
SCT (2017) Integra Underground Mine: Subsidence Assessment for LW13 and LW14 Extraction Plan.
SCT (2018) Integra Underground Mine: Six-monthly Subsidence Report for Longwall 13.
SCT (2019) Integra Underground Mine: Six-monthly Subsidence Report for Longwall 13 & 14.
SLR (2017) Creek Crossing Management Plan.
SLR (2017a) Integra Underground Coal Project, Biodiversity Management Plan, Baseline Monitoring Report.
SLR (2017b) Mining Operations Plan, Integra Underground, January 2017 – December 2018.
SLR (2018a) Mining Operations Plan, Integra Underground, November 2018 – December 2023.
SLR (2018b) May 2018 Integra Bettys Creek Monitoring Report.
SLR (2018c) October 2018 Integra Bettys Creek Monitoring Report
SLR (2019) Integra Underground Longwall 13 and Longwall 14 Biodiversity Monitoring Report 1.
The Singleton Argus (2018) Toe tapping big band music will have the Civic Centre rocking (30 October 2018)
Umwelt (2018) Heritage Assessment of Two Buildings Proposed for Removal, Integra Underground Pit Top Area, Glennies Creek.
Umwelt (2019) Integra Underground 2018 Annual Rehabilitation Monitoring Report.
WSP (2018) Integra Underground Project PA 08_0101 Independent Environmental Audit 2017.
Page 68
APPENDIX A TEOM Exceedances
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Table 42 Full list of TEOM Exceedances PM10 - 24Hr Date Sampled Sample Site Exceedance Reasoning mean (µg/m³) TEOM 1 53.1 Temperature reached 42.9oC; wind direction is opposite to that which operations would contribute 07/01/2018 TEOM 2 98.7 to result; minimal surface activities undertaken on 7/01 as part of operations. TEOM 1 52.6 Wind direction is opposite to that which operations would contribute to result; minimal surface 09/02/2018 TEOM 4 51.1 activities undertaken on 9/02 as part of operations. Temperature reached 39.6oC; wind direction is opposite to that which operations would contribute 11/02/2018 TEOM 2 54.7 to result; minimal surface activities undertaken on 11/02 as part of operations. TEOM 1 53.5 TEOM 2 59.1 Temperature reached 38.2oC; wind direction is opposite to that which operations would contribute 15/02/2018 TEOM 3 64.8 to result; minimal surface activities undertaken on 15/02 as part of operations. TEOM 4 71.8 Temperature reached 35.8oC; wind direction is opposite to that which operations would contribute 16/02/2018 TEOM 4 51.2 to result; minimal surface activities undertaken on 16/02 as part of operations. TEOM 1 58.3 TEOM 2 60.7 Temperature reached 39.1oC; wind direction is opposite to that which operations would contribute 19/03/2018 TEOM 3 63.4 to result; minimal surface activities undertaken on 19/03 as part of operations. TEOM 4 72.1 Temperature reached 30.2oC; wind direction is opposite to that which operations would contribute 12/04/2018 TEOM 4 51.9 to result; minimal surface activities undertaken on 12/04 as part of operations. Wind speed reached 10.4m/s and temperature 31.2oC; wind direction is opposite to that which 13/04/2018 TEOM 4 64.8 operations would contribute to result; minimal surface activities undertaken on 13/04 as part of operations. TEOM 1 113.8 TEOM 2 73.9 Wind speed reached 14m/s; wind direction is opposite to that which operations would contribute to 15/04/2018 TEOM 3 68.3 result; minimal surface activities undertaken on 15/04 as part of operations. TEOM 4 83.2 04/05/2018 TEOM 1 89.7 Wind speed reached 10m/s; wind direction is opposite to that which operations would contribute to
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PM10 - 24Hr Date Sampled Sample Site Exceedance Reasoning mean (µg/m³) TEOM 2 58.9 result; minimal surface activities undertaken on 4/05 as part of operations. TEOM 3 56.5 TEOM 4 72.0 TEOM 1 77.2 Wind speed reached 12.6m/s; wind direction is opposite to that which operations would contribute 10/05/2018 TEOM 2 54.2 to result; minimal surface activities undertaken on 10/05 as part of operations. TEOM 4 62.3 TEOM 1 88.5 Wind speed reached 12.1m/s; wind direction is opposite to that which operations would contribute 11/05/2018 TEOM 4 63.3 to result; minimal surface activities undertaken on 11/05 as part of operations. Wind direction is opposite to that which operations would contribute to result; minimal surface 19/05/2018 TEOM 2 50.1 activities undertaken on 19/05 as part of operations. TEOM 1 51.8 Wind speed reached 9.1m/s; wind direction is opposite to that which operations would contribute 21/05/2018 TEOM 4 65.7 to result; minimal surface activities undertaken on 11/05 as part of operations. Wind direction is opposite to that which operations would contribute to result; minimal surface 22/05/2018 TEOM 4 51.7 activities undertaken on 22/05 as part of operations. Wind direction is opposite to that which operations would contribute to result; minimal surface 04/07/2018 TEOM 4 61.5 activities undertaken on 4/07 as part of operations. Wind speed reached 13.9m/s; wind direction is opposite to that which operations would contribute 06/07/2018 TEOM 4 63.6 to result; minimal surface activities undertaken on 6/07 as part of operations. Wind speed reached 13.7m/s; wind direction is opposite to that which operations would contribute 07/07/2018 TEOM 1 62.7 to result; minimal surface activities undertaken on 7/07 as part of operations. TEOM 1 52.6 Wind speed reached 13.9m/s; wind direction is opposite to that which operations would contribute 12/07/2018 TEOM 2 53.9 to result; minimal surface activities undertaken on 12/07 as part of operations. Wind direction is opposite to that which operations would contribute to result; minimal surface 15/07/2018 TEOM 1 51.4 activities undertaken on 15/07 as part of operations. TEOM 1 71.0 Wind speed reached 10.3m/s; wind direction is opposite to that which operations would contribute 16/07/2018 TEOM 2 54.2 to result; minimal surface activities undertaken on 16/07 as part of operations. TEOM 4 64.3 17/07/2018 TEOM 1 79.3 Wind speed reached 10.4m/s; wind direction is opposite to that which operations would contribute
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PM10 - 24Hr Date Sampled Sample Site Exceedance Reasoning mean (µg/m³) TEOM 4 72.9 to result; minimal surface activities undertaken on 17/07 as part of operations. TEOM 1 87.7 TEOM 2 70.6 Wind direction is opposite to that which operations would contribute to result; minimal surface 18/07/2018 TEOM 3 60.8 activities undertaken on 18/07 as part of operations. TEOM 4 70.0 TEOM 1 68.8 Wind speed reached 9.8m/s; wind direction is opposite to that which operations would contribute 19/07/2018 TEOM 2 54.2 to result; minimal surface activities undertaken on 19/07 as part of operations. TEOM 4 59.7 TEOM 1 90.3 TEOM 2 51.8 Wind speed reached 15m/s; wind direction is opposite to that which operations would contribute to 20/07/2018 TEOM 3 65.5 result; minimal surface activities undertaken on 20/07 as part of operations. TEOM 4 68.0 Wind direction is opposite to that which operations would contribute to result; minimal surface 22/07/2018 TEOM 2 53.8 activities undertaken on 22/07 as part of operations; regional dust event in Hunter Valley. TEOM 1 78.8 Minimal surface activities undertaken on 23/07 as part of operations; regional dust event in Hunter 23/07/2018 TEOM 2 64.0 Valley. TEOM 1 144.8 TEOM 2 92.5 Minimal surface activities undertaken on 24/07 as part of operations; regional dust event in Hunter 24/07/2018 TEOM 3 52.9 Valley. TEOM 4 86.4 TEOM 1 83.9 TEOM 2 60.9 Minimal surface activities undertaken on 25/07 as part of operations; regional dust event in Hunter 25/07/2018 TEOM 3 50.4 Valley. TEOM 4 64.5 TEOM 1 68.5 Minimal surface activities undertaken on 26/07 as part of operations; regional dust event in Hunter 26/07/2018 TEOM 4 53.4 Valley. 28/07/2018 TEOM 1 58.2 Wind direction is opposite to that which operations would contribute to result; minimal surface
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PM10 - 24Hr Date Sampled Sample Site Exceedance Reasoning mean (µg/m³) TEOM 2 62.9 activities undertaken on 28/07 as part of operations. Wind speed reached 14.1m/s; wind direction is opposite to that which operations would contribute 29/07/2018 TEOM 1 53.9 to result; minimal surface activities undertaken on 29/07 as part of operations. TEOM 1 56.6 Wind speed reached 10.4m/s; wind direction is opposite to that which operations would contribute 30/07/2018 TEOM 4 50.1 to result; minimal surface activities undertaken on 30/07 as part of operations. Wind speed reached 11.6m/s; wind direction is opposite to that which operations would contribute 31/07/2018 TEOM 4 54.8 to result; minimal surface activities undertaken on 31/07 as part of operations. TEOM 1 53.3 Wind speed reached 17.3m/s; wind direction is opposite to that which operations would contribute 01/08/2018 TEOM 4 50.2 to result; minimal surface activities undertaken on 1/08 as part of operations. TEOM 1 62.3 TEOM 2 56.7 Wind speed reached 10.9m/s; wind direction is opposite to that which operations would contribute 04/08/2018 TEOM 3 50.3 to result; minimal surface activities undertaken on 4/08 as part of operations. TEOM 4 66.9 Wind speed reached 10.9m/s; wind direction is opposite to that which operations would contribute 05/08/2018 TEOM 1 63.3 to result; minimal surface activities undertaken on 5/08 as part of operations. TEOM 1 58.2 Wind speed reached 12.3m/s; wind direction is opposite to that which operations would contribute 07/08/2018 TEOM 4 51.5 to result; minimal surface activities undertaken on 7/08 as part of operations. TEOM 1 64.4 Wind speed reached 15m/s; wind direction is opposite to that which operations would contribute to 15/08/2018 TEOM 4 78.7 result; minimal surface activities undertaken on 15/08 as part of operations. Wind speed reached 10.9m/s; wind direction is opposite to that which operations would contribute 16/08/2018 TEOM 1 56.4 to result; minimal surface activities undertaken on 16/08 as part of operations. TEOM 1 77.9 Wind speed reached 12.6m/s; wind direction is opposite to that which operations would contribute 18/08/2018 TEOM 4 56.7 to result; minimal surface activities undertaken on 18/08 as part of operations. Wind speed reached 11.1m/s; wind direction is opposite to that which operations would contribute 19/08/2018 TEOM 1 66.2 to result; minimal surface activities undertaken on 19/08 as part of operations. Wind speed reached 9.4m/s; wind direction is opposite to that which operations would contribute 20/08/2018 TEOM 1 57.1 to result; minimal surface activities undertaken on 20/08 as part of operations. 21/08/2018 TEOM 1 74.4 Wind speed reached 9m/s; wind direction is opposite to that which operations would contribute to
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PM10 - 24Hr Date Sampled Sample Site Exceedance Reasoning mean (µg/m³) TEOM 4 53.1 result; minimal surface activities undertaken on 21/08 as part of operations. Wind direction is opposite to that which operations would contribute to result; minimal surface 13/09/2018 TEOM 2 57.7 activities undertaken on 13/09 as part of operations. TEOM 2 77.7 Wind speed reached 12.9m/s; wind direction is opposite to that which operations would contribute 15/09/2018 TEOM 4 73.6 to result; minimal surface activities undertaken on 15/09 as part of operations. o TEOM 2 50.4 Wind speed reached 12.9m/s and temperature 27.7 C; wind direction is opposite to that which 19/09/2018 operations would contribute to result; minimal surface activities undertaken on 19/09 as part of TEOM 4 66.3 operations. Wind speed reached 7.5m/s and temperature 33.9oC; wind direction is opposite to that which 31/10/2018 TEOM 2 58.8 operations would contribute to result; minimal surface activities undertaken on 31/10 as part of operations. TEOM 2 57.7 Wind speed reached 12.3m/s and temperature 37.7oC; wind direction is opposite to that which 06/11/2018 TEOM 3 65.8 operations would contribute to result; minimal surface activities undertaken on 6/11 as part of TEOM 4 82.4 operations. Wind speed reached 13.3m/s and temperature 28.2oC; wind direction is opposite to that which 21/11/2018 TEOM 4 78.6 operations would contribute to result; minimal surface activities undertaken on 21/11 as part of operations. TEOM 2 163.2 Wind speed reached 15.4m/s; wind direction is opposite to that which operations would contribute 22/11/2018 TEOM 3 166.0 to result; minimal surface activities undertaken on 22/11 as part of operations; bushfire burning in TEOM 4 210.7 the local area and regional dust event in Hunter Valley. TEOM 2 124.0 Wind speed reached 15.7m/s; wind direction is opposite to that which operations would contribute 23/11/2018 TEOM 3 147.1 to result; minimal surface activities undertaken on 23/11 as part of operations; regional dust event TEOM 4 159.1 in Hunter Valley. Wind speed reached 14.7m/s and temperature 36.4oC; wind direction is opposite to that which 02/12/2018 TEOM 4 60.8 operations would contribute to result; minimal surface activities undertaken on 2/12 as part of operations. Temperature reached 38.4oC; wind direction is opposite to that which operations would contribute 30/12/2018 TEOM 2 50.2 to result; minimal surface activities undertaken on 30/12 as part of operations.
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APPENDIX B
HVAS Exceedances
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Table 43 List of TSP 1 exceedances contributing to a high annual average
Date Sampled TSP (µg/m³) Exceedance Reasoning Temperature reached a maximum of 43.2oC; wind direction is opposite to that which operations would contribute to 07/01/2018 255.0 result; minimal surface activities undertaken on 7/01 as part of operations. Wind speed reached 13.7m/s and temperature 39.3oC; wind direction is opposite to that which operations would 13/01/2018 257.0 contribute to result; minimal surface activities undertaken on 13/01 as part of operations. Wind speed reached 10.6m/s and temperature 39.3oC; wind direction is opposite to that which operations would 19/01/2018 108.0 contribute to result; minimal surface activities undertaken on 19/01 as part of operations. Temperature reached a maximum of 40.8oC; wind direction is opposite to that which operations would contribute to 12/02/2018 96.0 result; minimal surface activities undertaken on 12/02 as part of operations. Temperature reached a maximum of 39.1oC; wind direction is opposite to that which operations would contribute to 24/02/2018 91.0 result; minimal surface activities undertaken on 24/02 as part of operations. Wind speed reached 10.1m/s and temperature 39.1oC; wind direction is opposite to that which operations would 20/03/2018 91.0 contribute to result; minimal surface activities undertaken on 20/03 as part of operations. Wind speed reached 10.4m/s and temperature 35.0oC; wind direction is opposite to that which operations would 13/04/2018 144.0 contribute to result; minimal surface activities undertaken on 13/04 as part of operations. Wind direction is opposite to that which operations would contribute to result; minimal surface activities undertaken 07/05/2018 128.0 on 7/05 as part of operations. Wind direction is opposite to that which operations would contribute to result; minimal surface activities undertaken 13/05/2018 133.0 on 13/05 as part of operations. Wind direction is opposite to that which operations would contribute to result; minimal surface activities undertaken 19/05/2018 190.0 on 19/05 as part of operations. Wind speed reached 11.2m/s; wind direction is opposite to that which operations would contribute to result; minimal 18/06/2018 108.0 surface activities undertaken on 18/06 as part of operations. Wind speed reached 10.4m/s; wind direction is opposite to that which operations would contribute to result; minimal 30/06/2018 202.0 surface activities undertaken on 30/06 as part of operations. Wind speed reached 13.4m/s; wind direction is opposite to that which operations would contribute to result; minimal 06/07/2018 139.0 surface activities undertaken on 6/07 as part of operations. Wind direction is opposite to that which operations would contribute to result; minimal surface activities undertaken 12/07/2018 252.0 on 12/07 as part of operations. Wind direction is opposite to that which operations would contribute to result; minimal surface activities undertaken 18/07/2018 284.0 on 18/07 as part of operations.
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Date Sampled TSP (µg/m³) Exceedance Reasoning Wind speed reached 11.6m/s; wind direction is opposite to that which operations would contribute to result; minimal 24/07/2018 546.0 surface activities undertaken on 24/07 as part of operations; regional dust event in Hunter Valley. Wind speed reached 10.4m/s; wind direction is opposite to that which operations would contribute to result; minimal 30/07/2018 201.0 surface activities undertaken on 30/07 as part of operations. Wind speed reached 12.9m/s; wind direction is opposite to that which operations would contribute to result; minimal 05/08/2018 266.0 surface activities undertaken on 5/08 as part of operations. Wind speed reached 12.9m/s; wind direction is opposite to that which operations would contribute to result; minimal 11/08/2018 166.0 surface activities undertaken on 11/08 as part of operations. Wind direction is opposite to that which operations would contribute to result; minimal surface activities undertaken 17/08/2018 196.0 on 17/08 as part of operations. Wind direction is opposite to that which operations would contribute to result; minimal surface activities undertaken 29/08/2018 120.0 on 29/08 as part of operations. Wind speed reached 8.6m/s and temperature 30.8oC; wind direction is opposite to that which operations would 10/09/2018 426.0 contribute to result; minimal surface activities undertaken on 10/09 as part of operations. Wind speed reached 8.6m/s and temperature 30.8oC; wind direction is opposite to that which operations would 16/09/2018 96.0 contribute to result; minimal surface activities undertaken on 16/09 as part of operations. Wind speed reached 12.4m/s and temperature 30.8oC; wind direction is opposite to that which operations would 22/09/2018 235.0 contribute to result; minimal surface activities undertaken on 22/09 as part of operations. Wind speed reached 12.4m/s and temperature 30.8oC; wind direction is opposite to that which operations would 28/09/2018 116.0 contribute to result; minimal surface activities undertaken on 28/09 as part of operations. Wind speed reached 12.4m/s and temperature 35.9oC; wind direction is opposite to that which operations would 03/11/2018 173.0 contribute to result; minimal surface activities undertaken on 3/11 as part of operations. Wind speed reached 12.4m/s and temperature 38.2oC; wind direction is opposite to that which operations would 15/11/2018 99.0 contribute to result; minimal surface activities undertaken on 15/11 as part of operations. Wind speed reached 13.3m/s and temperature 38.2oC; wind direction is opposite to that which operations would 21/11/2018 103.0 contribute to result; minimal surface activities undertaken on 15/11 as part of operations. Temperature reached a maximum of 38.2oC; wind direction is opposite to that which operations would contribute to 03/12/2018 196.0 result; minimal surface activities undertaken on 3/12 as part of operations. Temperature reached a maximum of 38.2oC; wind direction is opposite to that which operations would contribute to 27/12/2018 100.0 result; minimal surface activities undertaken on 27/12 as part of operations.
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