Annual Environmental Management Report · 2017. 12. 7. · MYU21623_Annual Environmental Management Report Myuna Colliery Page 2 of 36 Table of Contents 1. Introduction_____5 1.1

Annual Environmental Management Report Centennial Coal Myuna Colliery January 2011 to December 2011

MYU21623_Annual Environmental Management Report Myuna Colliery

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Table of Contents 1. Introduction ______________________________________________________ 5

1.1. Consents, Leases and Licences _________________________________________ 5

1.2. Mine Contacts ______________________________________________________ 7

1.3. Actions Required at Previous AEMR Review ______________________________ 7

2. Operations during the reporting period ________________________________ 8

2.1. Exploration ________________________________________________________ 8

2.2. Land Preparation ____________________________________________________ 8

2.3. Construction _______________________________________________________ 8

2.4. Mining ____________________________________________________________ 8

2.5. Mineral Processing __________________________________________________ 8

2.6. Waste Management _________________________________________________ 9

2.6.1. Mining __________________________________________________________ 9

2.6.2. General Waste ____________________________________________________ 9

2.6.3. Recyclable Waste Collection Systems ________________________________ 10

2.6.4. Liquid and Hazardous Wastes: ______________________________________ 10

2.6.5. Ore and Product Stockpiles ________________________________________ 11

2.7. Water Management ________________________________________________ 11

2.7.1. Underground ____________________________________________________ 11

2.7.2. Surface _________________________________________________________ 11

2.8. Hazardous Material Management _____________________________________ 13

2.9. Surface Infrastructure _______________________________________________ 13

3. Environmental Management and Performance ________________________ 16

3.1. Environmental Risk Assessment ______________________________________ 16

3.2. Environmental Performance _________________________________________ 17

3.2.1. Air Pollution ____________________________________________________ 17

3.2.2. Erosion and Sedimentation ________________________________________ 19

3.2.3. Surface Water Management _______________________________________ 19

3.2.4. Groundwater ____________________________________________________ 26

3.2.5. Contaminated Polluted land _______________________________________ 26

3.2.6. Flora & Fauna ___________________________________________________ 26

3.2.7. Weeds _________________________________________________________ 27

3.2.8. Blasting ________________________________________________________ 27

3.2.9. Operational Noise ________________________________________________ 27

3.2.10. Visual, Stray Light ________________________________________________ 28


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3.2.11. Aboriginal Heritage _______________________________________________ 28

3.2.12. Natural Heritage _________________________________________________ 29

3.2.13. Spontaneous Combustion _________________________________________ 29

3.2.14. Bush fire ________________________________________________________ 29

3.2.15. Mine Subsidence _________________________________________________ 29

3.2.16. Hydrocarbon Contamination _______________________________________ 29

3.2.17. Greenhouse Gas _________________________________________________ 30

3.2.18. Public Safety ____________________________________________________ 30

3.2.19. Other Issues and Risks ____________________________________________ 30

4. Community Relations _____________________________________________ 31

4.1. Community Complaints & Enquiries ___________________________________ 31

4.2. Community Liaison and Sponsorships __________________________________ 31

5. Rehabilitation ___________________________________________________ 33

5.1. Buildings _________________________________________________________ 33

5.2. Rehabilitation of Disturbed Lands _____________________________________ 33

5.3. Other infrastructure ________________________________________________ 33

5.4. Rehabilitation Trials and Research_____________________________________ 33

5.5. Further development of the Final Rehabilitation Plan _____________________ 33

6. Activities Proposed in the Next Reporting Period _______________________ 34

7. LIST OF PLANS ___________________________________________________ 36

8. APPENDICES ____________________________________________________ 36

Tables Table 1: Summary of Myuna Colliery Approvals, Authorities & Licences.................. 6

Table 2: Myuna Colliery Contacts ............................................................................ 7

Table 3: Monthly General waste to land fill disposal ............................................... 9

Table 4: Liquid and Hazardous Recyclable Waste Volume / Quantity .................... 10

Table 5: 2010 Total Monthly Rainfall (mm) and Number of Wet Days (>15mm in 24 Hours) ................................................................................................................... 13

Table 6: Production and Waste Summary ............................................................. 15

Table 7: Stored Water ........................................................................................... 15

Table 8: High and Significant Environmental Risks at Myuna Colliery ................... 16

Table 9 Dust Gauge Locations ............................................................................... 18

Table 10 Dust Gauge Rolling Averages .................................................................. 18

Table 11: Discharge and Monitoring Point 1 ......................................................... 20


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Table 12: Discharge and Monitoring Point 2 ......................................................... 20

Table 13: Manganese results from Wangi bay ...................................................... 21

Table 14 Greenhouse Gas Emissions ...................................................................... 30

Table 15: Rehabilitation Summary ........................................................................ 35

Figures

Figure 1: 2011 Dust Deposition Gauge Results ...................................................... 19

Figure 2: Daily Mine Water Discharge from LDP001 .............................................. 22

Figure 3: LDP001 TSS Trends 2011 ......................................................................... 22

Figure 4: LDP002 TSS Trends 2011 ......................................................................... 23

Figure 5: LDP001 pH Trends 2011 .......................................................................... 24

Figure 6: LDP002 pH Trends 2011 .......................................................................... 24

Figure 7: LDP001 O&G Trends 2011 ....................................................................... 25

Figure 8: LDP002 O&GTrends 2011 ........................................................................ 25


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1. Introduction Myuna Colliery is an existing underground coal mine owned and operated by Centennial Myuna Pty Ltd, a wholly owned subsidiary of Centennial Coal Company Limited (Centennial). Myuna Colliery’s Surface Facilities Area is on the western side of Lake Macquarie, at Wangi Wangi, approximately 25 kilometres south-west of Newcastle, New South Wales.

Development of Myuna Colliery commenced in 1979 and since this time extraction of coal and associated mining activities has occurred in three coal seams (Wallarah, Great Northern and Fassifern) using bord and pillar methods.

Myuna Colliery operates under an existing Development Consent (SH 110/148) within the Development Consent Mining Area, in accordance with the conditions of relevant mining leases.

In 2010 Myuna Colliery submitted a Project Approval under Part 3A of the EP&A Act to continue mining in those areas outside the existing Development Consent Mining Area and within the existing mining leases. In January 2012, Myuna Colliery received Project Approval (10_0080) for the continuation of mining until 31 December 2032. This approval extends mining and coal handling at Myuna Colliery within the Colliery lease Area and proposes to:

• Mine using bord and pillar mining methods in the Wallarah, Great Northern, and Fassifern seams in CCL762 and ML1370, for a further 21 years;

• Produce, handle and distribute to Eraring Power Station, up to 2 million tonnes per annum (Mtpa) using existing infrastructure;

• Continue the use of ancillary infrastructure and service for a further 21 years; • Upgrade the water management system; and • Rehabilitate the surface facilities within 5 years of completion of mining.

This Annual Environment Management Report (AEMR) 2011 details the environment and community performance of Myuna Collieries operations for the twelve month period ending 31 December 2011.

The AEMR is a regulatory requirement and has been prepared in accordance with DII guidelines.

1.1. Consents, Leases and Licences The Colliery lease lies within the Parishes of Awaba, Cooranbong, Morisset and Wallarah in the County of Northumberland subsidence district and is located within the Shire of Lake Macquarie.

The Myuna Colliery Holding is covered by Consolidated Coal Lease No 762. The Consolidated Coal Lease No 762 includes a surface land area of 33 hectares for mine infrastructure (Mining Purposes Lease No. 334). The total lease area is 10,820 hectares. A summary of Myuna’s Approvals, Authorities and licences is presented in Table 1 below.


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Table 1: Summary of Myuna Colliery Approvals, Authorities & Licences

Name Summary Date Granted Expiry Date

Development Consent

Development of Myuna and Cooranbong Collieries, as described in the EIS and subject to certain conditions

21/12/1977 No expiration date specified in the consent. Subject to renewal of mining leases

Environmental Protection Licence (EPL) 366

Licence authorising discharges to water and Mining for coal at a rate of 0.5 – 2 Mtpa

01/01/2000 N/A

CCL 762 A title including the area originally in CL195 for coal mining purposes of approximately 10,820 Hectares

CL 195 granted 8/8/1979, consolidated into CCL 762 in 1991

Renewal 13/12/2022

MPL 334 Title to construct and operate prescribed mine related plant and infrastructure of approximately 33 Hectares

20/10/1994 Renewal 20/10/2015

ML 1370 Title that provides rights to mine the coal resource of approximately 653 hectares

26/09/1995 Renewal 02/12/2016

Exploration Licence (EL) 4444

Licence granted to allow exploration to be undertaken to determine the occurrence and extent of the coal resource and to assess the potential for mining of approximately 5,164 hectares

23/10/1992 Renewal 23/10/2012

Trade Waste Permit (D 171027)

Permits the discharge of ‘prohibited substances’ to sewer in accordance with various quality requirements

23/10/1995 N/A

Section 151 Licence (Mining Operations – Various Licence)

Installation and Monitoring of Surface Subsidence Stations at Point Wolsoncroft

10/09/2009 10/09/2015


Installation and Monitoring of Surface Subsidence Stations at Pulbah Island

1/11/2011 31/10/2016


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Installation and Monitoring of Surface Subsidence Stations at Wangi Wangi Point

16/02/2011 16/02/2015

Water Access Licence

Licensing of three existing dewatering bores at the Surface Facilities Area

Licence currently being sought

N/A

Development Consent (10_0080)

Extension of Mining – Environmental Assessment is currently being assessed by the Department of Planning

18/01/2012 31/12/2032

1.2. Mine Contacts The following are the mine contacts for any information with regards to this report.

Table 2: Myuna Colliery Contacts

Name Position Email Address Contact Telephone

Number

Roger Davis Colliery Manager [email protected]

02 4970 0221

Veronica Warren Environment and Community Officer

02 4970 0263

1.3. Actions Required at Previous AEMR Review An inspection by Department of Primary Industries for the 2010 AEMR was not conducted.


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2. Operations during the reporting period 2.1. Exploration

The majority of the Colliery reserves lie below a major water body – Lake Macquarie.

Exploration including Lake drilling is used to determine the solid rock head cover (solid rock mass between the lake bed and the working seams) and seam levels and geological anomalies. The exploration activities have included lake bore drilling programmes, in-seam drilling in advance of the mine workings and floor coring to meet requirements of DPI conditions for mining under foreshores.

There were no surface explorations drilling activities in the 2011 reporting period. There were 6 interseam drilling bores, 4 between the Fassifern and the Great Northern Seam, and 2 between the Wallarah and Great Northern Seams.

2.2. Land Preparation Approximately 21 Ha of the surface lease holding is used for services and infrastructure. No additional land preparation occurred during the reporting period.

2.3. Construction No construction within the surface lease holding of the mine occurred during the reporting period.

2.4. Mining Mining continued in the Wallarah, Great Northern and Fassifern seam in 2011. Mining in the three seams allow blending of the run of mine coal. Myuna Colliery produced 1,584,866 Tonnes of coal during the 2011 calendar year.

Results of subsidence monitoring programs in areas of Point Wolstoncroft and Pulbah Island continue to show negligible subsidence of <20mm with this trend expected to continue.

Mining activities conducted in the Wallarah, Great Northern & Fassifern Seams during the reporting period are illustrated on plans No MY11129, MY11130, and MY11131, respectively.

The coal handling plant facilities allow for sizing and crushing of the product prior to delivery via overland conveyor to the Eraring Power Station.

2.5. Mineral Processing The coal plant crushing arrangement consists of a primary and two secondary crushers, the final product is sized to less than 35mm for delivery to Eraring Energy. Management of coal


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fines and coal plant dust suppression systems are discussed in section 2.7 – Water Management.

2.6. Waste Management

2.6.1. Mining

There is no coal processing waste stored on site. Inert stone ballast material is stored in an onsite bin then removed periodically to be stored on the temporary coal stockpile area.

2.6.2. General Waste

In 2011 Myuna Colliery moved over to total waste management with JR Richards. This is to allow for more efficient management and reporting of waste, and also greater recycling through the sorting of waste brought to the surface from underground.

General waste is placed into one 15 m3 and 3m3 general waste bins. Table 3 illustrates monthly volume of general waste removed from the site during the reporting period.

Table 3: Monthly General waste to land fill disposal

Month Bulk Rubbish Tonnes

Jan-11 6.3

Feb-11 11.4

Mar-11 9.24

Apr-11 9.26

May-11 4.32

Jun-11 17.18

Jul-11 11.8

Aug-11 16.155

Sep-11 10.35

Oct-11 16.4

Nov-11 19.5

Dec-11 20.105


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2.6.3. Recyclable Waste Collection Systems

Surface cardboard is crushed into 50kg bails via a purpose built machine, which is then collected by JR Richards for recycling. The hire of a cardboard crusher reduces boxes in general waste bins. Training has meant that more office material is being placed in recyclable materials bins.

Ferrous & Non Ferrous Metal are collected using four scrap metal bins which are serviced as required. The removal of bulk scrap steel has greatly increased the amount of scrap steel being resold instead of put to general landfill. There was 285.18 Tonnes of scrap steel which was collected from the site and sold to Simsmetal for recycling during 2011.

All timber waste is stored until a sufficient quantity is collected to have an on-site tub grinder break it down to reusable wood chip. This chip is used for community requests & on-site rehabilitation works. Reusable pallets are neatly stored for reuse.

2.6.4. Liquid and Hazardous Wastes:

All waste oil on the mine surface is collected for reuse. Table 4 shows the waste oil taken off site for recycling during the reporting period under waste tracking guidelines.

Used batteries are stored on a spill collection tray in a safe, dry, designated area prior to removal off site by an EPA approved recycling company. The table below shows the used batteries taken off site for recycling during the reporting period under waste tracking guidelines.

Table 4: Liquid and Hazardous Recyclable Waste Volume / Quantity

Month / Year

Waste Oil / Litres / month / recycled

Used Batteries

January 10 5300

February 10 0

March 10 1600

April 10 0

1 Pallet Batteries

May 10 35

June 10 35

July 10 35

August 10 700


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2.6.5. Ore and Product Stockpiles

A small amount of stone ballast is collected in a bin on the surface coal handling facility and stored onsite.

2.7. Water Management

2.7.1. Underground

A major part of the Fassifern Seam remains dammed to ensure filtration through retention prior to pumping to the surface. Water in the Great Northern Seam is treated through a series of settlement ponds prior to delivery to the major dam underground.

A major restructure of the Great Northern seam pumping arrangements was conducted in 2007 and completed early in 2008. A large area has been dammed (allowing increased retention and settling times) and a major pumping installation was completed during 2009.

Mine water from all 3 seams is pumped to the surface Mine Water Settling Pond 2, which then flows to Mine Water Settling Pond 3 through a connecting weir, prior to discharge through LDP001 to Wangi Creek.

The underground water from the three seams is pumped to the main surface settling ponds at a maximum daily rate of 12 ML as per EPL 366 condition M2.1. The average daily discharge in 2011 was 6.0 ML.

2.7.2. Surface

Myuna Colliery’s Surface Facilities Area is located in proximity to Wangi Creek which is a heavily modified waterway as a result of the Wangi Power Station outflow canal. Myuna Colliery’s existing water management system discharges water to Wangi Creek through two discharge points licensed under Myuna Colliery’s EPL 366.

September 10 1500

October 10 0

November 10 232

December 10 2500

Total 11,937


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Surface water consists of runoff (both clean and dirty) that contributes to surface water storages. At Myuna Colliery these include the CHP Dam, mine water settlement ponds and the Emergency Coal Stockpile Sediment Dam.

The surface water system is divided into clean and dirty water catchments, as follows:

Clean water management - includes diversion of external catchment runoff through a series of clean water diversions which direct the flow of surface water from clean catchments away from dirty catchment areas, and the management of clean surfaces within the surface facilities area. Clean surfaces managed within the Surface Facilities Area include:

• Roof runoff from the administration, bathhouse and workshop buildings, which is collected through downpipes and directed to the piped stormwater network, into the first flush settlement tank, eventually discharging into an open channel which drains to Wangi Creek.

• Runoff from several clean hardstand areas including the car park and materials yard. To maintain these hardstand areas as clean catchments, regular sweeping is undertaken and these areas are also regularly inspected to ensure that they remain clean. This runoff is discharged through the first flush settlement tank eventually discharging into an open channel which drains to Wangi Creek.

• External catchment runoff from areas surrounding the Surface Facilities Area. There are clean water diversions currently in place. External catchment runoff flows into Wangi Creek.

Dirty water management - includes the capture of water from disturbed surfaces and a series of dirty water diversions which direct flow of dirty water to the dirty water management system. Dirty water sources include:

• Runoff from the CHP and storage yard which is directed through a series of open drains, diversions, collection sumps and pipes to the primary settlement tank, which then discharges into the CHP Dam.

• Runoff captured from the Emergency Coal Stockpile Area within the Emergency Coal Stockpile Sediment Dam. Water levels in the Emergency Coal Stockpile Sediment Dam are monitored, and water is transferred to Mine Water Settling Pond 2 as required through bi-directional pipeline and pumping mechanism. Water from Mine Water Settling Pond 2 flows to Mine Water Settling Pond 3 through a connecting weir, prior to discharge through LDP001 to Wangi Creek. In the event that the capacity of the Emergency Coal Stockpile Sediment Dam is exceeded, ponding extends into the broader Emergency Coal Stockpile Area.

• Runoff from the washdown bay is directed to the oil/water separator and tank. Water from the oil/water separator is pumped to the sewer in accordance with a Trade Waste Permit from Hunter Water Corporation. Monitoring of the system is conducted on CITECT.

In April 2011 Myuna Colliery installed a weather station in accordance with the requirements of Environmental Protection Licence (EPL) 366 condition M7. The below table show the total monthly rainfall and days where >15mm of rain fell in 24 hrs is recorded. This data is used for interpreting water quality and dust results and for implementing improvements in Myuna’s water management system. Data from January to March is from the rain gauge that was previously installed at the Colliery.


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Table 5: 2010 Total Monthly Rainfall (mm) and Number of Wet Days (>15mm in 24 Hours)

Period Total Rainfall (mm)

Wet Days

January 27 0

February 58.0 1

March 62.2 1

April 148.4 2

May 143.8 3

June 161.2 3

July 203.8 3

August 33.6 0

September 131.4 4

October 119.6 2

November 163.2 3

December 123.2 2

Total 1375.4 12

2.8. Hazardous Material Management No explosives were used at the mine during the 2011 reporting period.

Centennial Coal employees have access to the online up to date register Chemwatch. Myuna Colliery’s Hazardous Substance Management Plan specifies obligations, responsibilities and safe hazardous substances storage, purchase, use and general management of hazardous substances.

2.9. Surface Infrastructure Surface infrastructure at the Colliery comprises:

• Mine Infrastructure:


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o Men and materials portal;

o Conveyor drift portal;

o Drive houses;

o Up-cast ventilation shaft and fan-house;

o Downcast ventilation shaft;

o Road ballast and concrete bore holes with associated infrastructure;

o Power Factor Correction Banks;

o Diesel and Oil Tanks;

o Water storage tanks; and

o Emergency Coal Stockpile Area.

• Coal Handling Plant:

o Breaker and crusher groups, feeders and coal storage bins (ROM bin and Final Product Bin); and

o Surface conveyor systems.

• Workshop and administration infrastructure:

o Workshop, store and wash down facilities;

o Material yard and equipment/oil and gas stores;

o Materials reclaim area;

o Administration offices and bath house;

o Air compressors and associate infrastructure;

o Service bay;

o Hardstand areas, haul roads, car-parking areas and emergency heli-pad;

o Explosives magazine; and

o Fire station and associated fire fighting equipment.

• Pollution control infrastructure:

o Wash down bay oil/water separator;

o Primary settlement tank (sump);

o Emergency Coal Stockpile Sediment Dam and pump-house;

o Dust suppression system at the CHP and coal stockpile area;

o Sewerage treatment plant and associated infrastructure; and

o Hydrocarbon recycling depot.

o Water management Infrastructure.


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Table 6: Production and Waste Summary

Table 7: Stored Water

Volumes Held (cubic meters)

Start of Reporting Period

At end of Reporting Period

Storage Capacity

Clean Water 4x 100,000L 4 x 100,000L 4 x 100,000L

Dirty Water Nil Nil Nil

Controlled Discharge Water

Nil Nil Nil

Contaminated Water Nil Nil Nil

Note Clean Water: Backup water supply from Toronto Reservoir is connected to the incoming mains along with water supply from Wangi Reservoir in case of emergencies, allowing a secondary source of permanent mains pressure supply to the mine, however, this water supply was not required during the reporting period. The stored clean water in tanks is backup for emergencies should both water supplies be unavailable.

Note Dirty Water: Dirty water is collected, treated and processed in our Oil/Water sump and oil separator prior to discharge under Centennial Myuna’s Trade Waste Permit with Hunter Water to sewer. Separated waste oil is transported and disposed of by licensed contractor with waste details saved for waste tracking.

Note Contaminated Water: Contaminated water is not stored on site.

Cumulative Production (tonnes)

Start of Reporting Period

At end of Reporting Period

End of Next Reporting Period

Topsoil stripped Nil Nil Nil

Topsoil Used / Spread

Nil Nil Nil

Waste Rock 6600 7200 7800

Ore 34,799,472 36,552,756 38,137,622

Processing Waste Nil Nil Nil

Product (tonnes) 34,806,072 36,559,956 38,145,422


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3. Environmental Management and Performance 3.1. Environmental Risk Assessment

A risk assessment was completed using the Centennial Coal framework Stature (Previously known as Dyadem). This assessment was conducted for all relevant environmental management issues at the site. A copy of the risk assessment is attached as Appendix 1. The purpose of the risk assessment is to identify mine activities, processes and facilities which require control strategies to ensure environmental protection and compliance with conditions of the leases, licence(s) and the development consents.

To identify risks, consideration should be given to circumstances which may trigger or exacerbate risks from: intense rain or storm events; prolonged above average rain; drought; flood and inundation, wind, earthquake, fire, equipment breakdown, human error, and accidents.

The Environmental Risk Assessment is reviewed annually to identify any new risks, controls implemented or changes in legislative requirements. This document lists current or existing controls and new controls that may be investigated during the next report period.

The higher risks identified in the Annual Environmental Risk Assessment can be found in Table 9 below.

Table 8: High and Significant Environmental Risks at Myuna Colliery Background Potential Incident RR

Surface water management There is a risk to Myuna from

::: Water discharge quality through LDP002 greater then licence limits. (TSS, pH, O&G, heavy metals) :::

Caused by:

Algae content in the water or CHP Coal Spill or Failure of flocculation system (Mine water) or Failure of pollution control system (sumps full) or Heavy metal content in water or Heavy rainfall or High ash / clay levels in coal or Hydrocarbon spills / leaks or Overflow of compressor condensate 1,000Ltr temporary tank or Poor management in waste sorting area or Rainfall event or Underground machinery & equipment brought to the surface

Resulting in: Community Complaints or Exceeding licence limits or Non-compliance with Development Consent conditions or Pollution of waterways.

9

(H)

Surface water management There is a risk to Myuna from

::: Discharge from site exceeding quantity licence limits on LDP002 via the overflow pipe on the CHP Dam :::

Caused by:

Heavy rainfall

Resulting in: Exceeding licence limits.

14

(S)


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3.2. Environmental Performance This section presents a summary of relevant monitoring data for Myuna Colliery.

3.2.1. Air Pollution

(i) Dust

The Dust Management Plan for the site outlines potential sources and impacts of raised dust levels. The Plan also identifies measures which must be in place to reduce dust and environmental activities conducted to minimise elevated dust levels. All contractors and employees undergo induction and regular refresher training to help identify responsibilities.

In order to determine the effectiveness of the colliery’s dust control measures, a network of dust depositional monitoring gauges has been established. Depositional gauges are located on the Colliery boundary, a total of 4 depositional gauges are utilised (locations identified in plan MY10965 attached).

For the report period an independent consultant collected the samples for analyses. Samples were taken from the depositional gauges every 30 + or - 2 days as per Approved Methods for the Sampling and Analysis of Air Pollutants in NSW.

(ii) Dust Control Measures

Due to the physical nature of operations there is the potential for air pollution due to suspended dust particles. The dust generally emanates from stockpiles and operational hardstand areas and can be either wind or traffic generated.

Over the report period control measures implemented in these areas to minimise the potential for dust generation are outlined below.

• Vacuum sweeping - All hard stand and sealed roads are swept by a vacuum sweeper truck on a weekly basis.

• Damping Down - The haul road and coal pad areas are damped down when required. • Speed Limits - Speed on site is limited to 20 km/h. • Conveyors - Conveyors are enclosed and washed down weekly to prevent aeration • Buffer zone and topography - Maintaining a vegetated buffer zone assists in

reducing any airborne particulate movement from site. The mine is positioned in a small hollow which reduces the effect and severity of wind gusts, and the surrounding vegetation acts as a filter system if airborne dust is created.

(iii) Dust Monitoring

Dust monitoring was performed at the Colliery during 2011 and occurs on a monthly basis at four dust depositional gauges (Table 9). During 2011, the dust deposition gauges were added to the Myuna Colliery Environmental Protection Licence (EPL).


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Monthly results are collated and assessed against the DECCW annual average guideline of 4 g/m2/month for total insoluble solids. Table 10 below shows the rolling annual averages for each dust gauge.

Table 9 Dust Gauge Locations

Dust Gauge

GPS Location Description

D1 366672E, 6340919N

Between boundary of Power Station and Wangi Creek

D2 366202E, 6341128N

Western side of disused weigh bridge

D3 366669E, 6340350N

Horse paddock, off Wangi Point Road

D4 366020E, 6340755N

Between Summerville Drive and the final products bin

Table 10 Dust Gauge Rolling Averages

Annual Average DG1 DG2 DG3 DG4

Total Insoluble Solids (g/m2/month)

0.6 0.6 1.0 0.9

DECCW Annual Average Guideline

4.0 4.0 4.0 4.0

The annual average for each dust gauge is below the DECCW guideline (4/g/m2/month). Figure 1 also shows the monthly results from the Dust Depositional Gauges.


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Figure 1: 2011 Dust Deposition Gauge Results

3.2.2. Erosion and Sedimentation

Myuna Colliery has 3 dams designed with over/under weirs, permanent floating booms, and a drive in sump. These structures are inspected weekly. A status report is generated by the Environment & Community Officer and actions are initiated as and when required.

Emergency sediment control equipment is contained in the store and contains, booms, stakes, sediment fencing, & shovels.

Checking of fire trails, roads and unvegetated areas occurs routinely under work orders through the PULSE system. No vegetation clearing works were undertaken nor were erosion or sedimentation issues or incidents recorded for the reporting period.

3.2.3. Surface Water Management

Myuna Colliery has a Water Management Plan which discusses responsibilities, pollution sources, hazards, risks and mitigation strategies of water management. Regular refresher training and site inductions discuss water management to make personnel aware of the site issues. The water management system at Myuna is discussed in further detail in Section 2.7 above.

Myuna Colliery operates under an Environmental Protection Licence (EPL) No 366. This Licence specifies monitoring and reporting requirements along with criteria for water discharge through LDP001 and LDP002.


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There was a review of the EPL during the reporting period which required increased monitoring at the site from monthly to daily for pH, TSS, O&G and Conductivity, with other additional monitoring parameters to be sampled for on a monthly basis (including a variety of metals). Myuna Colliery also received a Pollutions Studies and Reduction Program (PRP) to conduct an assessment of potential impacts of metals.

During the 2011 reporting period there were four non-compliances with the Environmental Protection Licence. This includes a Total Suspended Solids (TSS) exceedence at LDP001, a TSS exceedence at LDP002, and 2 non-conformances as a result of the Coal Handling Plant Dam overflowing. The monitoring results for 2011 and non-compliances with the licence can be found in more detail in Appendix 2 – Annual Return.

The Following tables show the results of the water monitoring against the concentration limits as set out in the EPL.

Table 11: Discharge and Monitoring Point 1 Pollutant Unit of

Measure Licence concentration limit

No. of Samples Required by licence

No. of samples you collected and analysed

Lowest Sample Value

Mean of Samples

Highest Sample Value

pH pH 6.5 – 8.5 309 320 7.11 7.54 8.02

Total Suspended Solids

mg/L 50 309 320 1<5 4.61 54

Oil & Grease mg/L 10 309 331 1< 2 0.22 6

1= Indicates that the result was below detectable limits of the NATA accredited instrumentation at laboratory.

Table 12: Discharge and Monitoring Point 2 Pollutant Unit of

Measure Licence concentration limit

No. of Samples Required by licence

No. of samples you collected and analysed

Lowest Sample Value

Mean of Samples

Highest Sample Value

pH pH 6.5 – 8.5 309 309 7.26 7.52 7.89

Total Suspended Solids

mg/L 50

309 309 1<5 9.34 299

Oil & Grease mg/L 10 309 322 1< 2 0.27 8

1 = Indicates the result was below NATA accredited laboratory instrument limit of reporting.


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The risk of surface polluted water leaving the site remains one of the highest environmental risks at the Colliery. Numerous hard barriers and control measures are in place at the Colliery to address this risk. The Colliery submits an Annual Return to the EPA every year, summarising water quality information. The Annual Return can be found in Appendix 2.

(iv) Manganese Monitoring in Lake Macquarie

Under special condition E1 Additional Monitoring of Licence No 366, a surface water monitoring program in Wangi Bay has been implemented. The program requires three monthly sampling for the level of filterable manganese to be carried out. The results are submitted to the EPA Regional Manager, Hunter. Below are the results for the reporting period.

Table 13: Manganese results from Wangi bay

Date Filterable Manganese (mg/L)

T2 – 5m (1) T2 – 5m (2) T2 – 10m (1) T2 – 10m (2)

14/03/11 0.177 0.188 0.153 0.158

16/06/11 0.034 0.036 0.034 0.035

15/09/11 0.004 0.004 0.003 0.003

14/12/11 0.248 0.559 0.459 0.422

(v) Monitoring Data Results for the 2011 Calendar Year


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Figure 2: Daily Mine Water Discharge from LDP001

Figure 3: LDP001 TSS Trends 2011


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Figure 4: LDP002 TSS Trends 2011

The Figures 3 & 4 show the TSS results for LDP001 and LDP002 during the reporting year. As can be seen in Figure 3, there was 1 TSS exceedence at LDP001 during the year. Details of this exceedence can be found in Appendix X.

Environmental Protection Licence (EPL) 366 contains a condition (L2.5) which states “Exceedences of the concentration limits for TSS in Condition L3.3 are permitted at the following points during the duration of the overflow. LDP2 whenever a wet weather overflow is occurring due to stormwater events greater than or equal to 15mm.”

There was 1 non-conformance with regards to high TSS reported in the Annual Return (Appendix 2) for 2011. For every other occurrence of high TSS, the rainfall had been greater than or equal to 15mm. Myuna Colliery is currently investigating methods of reducing discharges with elevated TSS.


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Figure 5: LDP001 pH Trends 2011

Figure 6: LDP002 pH Trends 2011

Figures 5 & 6 shows the results of pH monitoring at LDP001 and LDP002 during the reporting period. There were no pH exceedences in 2011.


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Figure 7: LDP001 O&G Trends 2011

Figure 8: LDP002 O&GTrends 2011

Figures 7 & 8 show the results of Oil & Grease (O&G) monitoring at LDP001 and LDP002 during the reporting period. There were no O&G exceedences in 2011.


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3.2.4. Groundwater

Water in underground workings is generated from ground water which is released from the strata into mine workings, as well as process water. The collected water is pumped through an extensive system that allows filtration and settlement in large dams. The water is then pumped from the mine into the surface settlement pond systems prior to discharge via EPL LDP001.

Continual sampling and inline flow monitoring enables monitoring of Myuna operations impact on the groundwater quality and increase or decrease in groundwater make. No incident of contamination or variation in flow volumes occurred over the report period.

No piezometer groundwater monitoring was undertaken during the report period.

3.2.5. Contaminated Polluted land

A Phase 2 Part 1 contaminated site assessment was completed during the 2008 year. Potential areas of contamination were identified. Ongoing investigations into contaminated lands will occur over the life of the mine.

Under Section 3 of the Environmental Management System, a Hydrocarbon Management Plan is in place to reduce the risk of contamination by hydrostatic materials. Spills are controlled in appropriate areas of the pit top surface, they are cleaned up using emergency spill kit material which is restocked once a month. Spills are reported in accordance with our internal environmental incident reporting system and investigated.

Training in Myuna’s Hydrocarbon Management Plan occurs in all inductions with refresher training rolled out to the workforce routinely to ensure all personnel appropriately manage hydrocarbons and spills.

3.2.6. Flora & Fauna

Within the Environmental Management System sits the Land Management Plan and the Bushfire Management Plan. These plans identify different vegetation types and management methods. No threatened flora or fauna was impacted due to surface or mining operations during the reporting period.

A Flora Assessment was conducted on site in 1999, one vulnerable species (under Threatened Species Conservation Act (1995) was identified. Tetratheca juncea was found to occur in small numbers in the mines buffer zone.

A fauna survey was also conducted in 1999, while two vulnerable species (Koala and Swift Parrot as per Threatened Species Conservation Act, 1995) have been observed in bushland near the Colliery no evidence of Koalas using the site were observed. The report determined that the likelihood of the Swift Parrot using the buffer zones as a nesting site was extremely low. Some suitable feeding trees for Koalas were observed on site.


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A Terrestrial Flora and Fauna Impact Assessment was completed during the 2010 reporting period for the Myuna Colliery Extension of Mining Environmental Assessment. A search of the DECCW Wildlife Atlas revealed there were 24 threatened flora species (7 Endangered & 17 Vulnerable) & 56 threatened terrestrial fauna species (8 endangered & 48 vulnerable) listed under the TSC Act in the lease area.

Minimal changes to sub-surface hydrology are expected and existing infrastructure at the Surface Facilities Area will be utilised to service Myuna Colliery. Due to the predicted negligible surface impacts, Myuna Colliery is unlikely to impact on any threatened species, endangered population or TECs.

Minimal removal of vegetation occurred during the reporting period

3.2.7. Weeds

Under Section 8 of the Environmental Management System is the Weed & Pest Management Plan. This plan identifies the weeds on site and management techniques used to control them. A contract weed controller is engaged to manage weeds at the Colliery on a regular basis. A weed audit was conducted during the reporting period, with a weed action plan to be implemented in the 2012 reporting period.

3.2.8. Blasting

No blasting was undertaken in the reporting period. No Underground shot firing was undertaken during the report period.

3.2.9. Operational Noise

During the reporting period the existing Leases, Licence and approvals did not require Myuna Colliery to perform any noise monitoring. In January 2012 Myuna received development consent approval which requires that a Noise Management Plan and monitoring program be developed.

Myuna Colliery does not transport coal by road or rail. Coal is transported directly to Eraring Power Station by direct conveyor which is owned and operated by Eraring Power Station. The ROM coal drop bin has been removed as Myuna no longer separates any coal for export.

Trees surround the surface area of the Colliery for approximately 270°. The now obsolete Wangi Power Station occupies the remaining area. Overall, the Colliery is well screened from nearby residences, of which the closest is approximately 500-600 metres away.

The surrounding vegetated buffer zone and the Wangi Power Station are at slightly higher elevation than the Colliery surface infrastructure. This is forming a natural ‘bowl’ that the colliery sits within.


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A impact noise assessment was completed as part of the Part 3A. This report concluded that the operation noise levels are predicted to meet the project specific noise criteria at all assessed residential receivers under calm and prevailing weather conditions with the recommended noise mitigation and management strategies in place.

3.2.10. Visual, Stray Light

The Myuna Colliery Surface Facilities Area is surrounded by ridgelines which vary from 20 to 50 metres RL. The Surface Facilities Area is bound in all directions by a natural bushland buffer and road network, with the closest receivers over 500 metres away. The surface facilities are well shielded from passerby traffic and residences and contribute a very low visual impact to the area.

3.2.11. Aboriginal Heritage

A study in 1977 stated that no aboriginal sites or artefacts were recorded.

The Colliery’s underground workings extend under Point Wolstoncroft in Lake Macquarie which is listed as State Conservation Area under NPWS legislation. The application to mine under Point Wolstoncroft was granted approval by DPI 15 March 2007 (S89 Consent to Mine in High Water Level Subsidence Control Zone). A further variation to the original approved mining plan have been subsequently submitted and approved 18 August 2008. A condition of the original approval, was to perform routine subsidence monitoring on Point Wolstoncroft. To perform subsidence monitoring on Point Wolstoncroft a S90 Consent to Destroy was required, applied for (together with REF) and granted by NPWS (26 June 2007) to perform subsidence monitoring on the island which included several conditions.

A Cultural Heritage Assessment was also completed as part of the Part 3A process. Results of DECCW’s Aboriginal Heritage Information Management System (AHIMS) found that the most commonly occurring heritage site type associated with Lake Macquarie are middens. The AHIMS database search identified 11 middens, two isolated finds and one Potential Archaeological Deposit previously recorded across the lease Area, and a number of artefact scatters, open camp sites and scarred trees within the surrounding area.

The field survey conducted as part of the Assessment recorded an additional 4 new sites, and two previously identified sites, as detailed below:

• Midden located at Myuna Bay • Cultural Site at Buttaba Hills • Midden – Previously recorded site. Anadara trapezia adjacent waterhole • Midden; artefacts; cultural site – extensive Anadara trapezia, few Ostr

The Cultural Heritage Assessment also identified the following European Heritage items in and surrounding the lease areas:

• Decommissioned Wangi Power Station • Threkholds original Coal Mine • Remnants of the Wangi Power Station railway line


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3.2.12. Natural Heritage

An extensive Environmental Assessment undertaken for the mine’s original development consent approval included information regarding aboriginal heritage, natural drainage and current landuse.

Mine design is such that there is no visible disturbance to the surface due to mine subsidence therefore no impact predicted to natural heritage or the requirement for investigation triggered.

3.2.13. Spontaneous Combustion

There were no occurrences of spontaneous combustion during the reporting period in stockpiles or underground.

3.2.14. Bush fire

Surface structures have fire protection equipment installed around them for compliance with the Coal Mines Regulation Act 1999. A designated Fire Officer is in charge of maintaining the fire equipment on the surface and underground areas of the site.

Regular mowing of the lawns surrounding the building structures ensures fire fuel loading is well within acceptable limits. No bushfire incidents occurred in the reporting period.

Hazard reduction slashing around the boundary and Asset Protection Zones are recorded in our Bushfire Management Plan. Fire Trails and vegetated zones are routinely inspected. A fuel loading assessment is performed throughout the sites buffer zones annually by the Wangi Fire Brigade and Environment and Community Officer.

3.2.15. Mine Subsidence

The Subsidence effects in the surface mining areas are predicted to be negligible (ie. <20 mm). This prediction is based on latest pillar design principles, local roof and floor conditions and results of subsidence monitoring to date.

A monitoring program has been implemented to collect data on surface movement. The formation of pillars is effectively managed to ensure headings and cut-throughs are formed to design dimensions.

A Panel inspection/audit system has been implemented to monitor and report any deviation from the plan and the corrective action taken.

3.2.16. Hydrocarbon Contamination

Under Section 6 of the Environmental Management System is the Hydrocarbon Management Plan to ensure hazards and risks are identified and harm minimisation and


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mitigation systems are in place. All hydrocarbon materials are stored within a dedicated bunded bulk oil store building.

Emergency spill stations are positioned in strategic locations around the site surface and provide hydrocarbon spill containment equipment. All emergency spill equipment is checked and refilled regularly and a written report carried out monthly.

Potential areas where historic operations may have contaminated land have been identified through the phase two part 1 contaminated land survey.

Hydrocarbon spills are immediately cleaned up and contaminated material disposed of appropriately and reported to Environment and Community Officer.

3.2.17. Greenhouse Gas

Estimation of the GHG emissions associated with the Myuna was undertaken using the emission factors and methods outlined in the National Greenhouse and Energy Reporting (Measurement) Determination 2008.

Table 14 Greenhouse Gas Emissions Emissions (CO2-eT)

Diesel 200 Electricity 7,366 CO2 Emissions 1,963 CH4 Emissions 75,690

Total Emissions (CO2-eT) 85,219 Note: Values are for the period of July 2010 to June 2011.

3.2.18. Public Safety

Myuna Colliery is surrounded by fencing and is patrolled by security staff on a regular basis; public safety was not a concern during the reporting period.

No surface impacts from mining that could pose a risk to public safety were identified during the report period.

3.2.19. Other Issues and Risks

There were no other environmental issues or risks encountered during the reporting period.


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4. Community Relations 4.1. Community Complaints & Enquiries

A community complaints register is kept on site including forms that are to be completed by staff that receives a complaint. This information is then entered into the Centennial Coal Environment and Community Database (ECD).

There were no complaints regarding the Colliery during the reporting period.

On the 23rd of October 2011 a resident contacted the colliery as they could hear an alarm, which had been going all day. The resident was informed that the alarm was from the Conveyor belt which is owned by Eraring. The Colliery contacted Eraring to get the alarm turned off. The resident wished to remain anonymous, therefore Colliery was unable to follow up on this call.

4.2. Community Liaison and Sponsorships Myuna Colliery operates under a Stakeholder Engagement Plan, and continues to support the local community through various sponsorship schemes. The following is the sponsorship and support carried out locally during the calendar year:

• Myuna Colliery was a major sponsor of the Wangi Dobell Festival of Arts and Crafts 2011;

• Sponsorship of the Centennial Coal Australia Day Regatta run by the Wangi RSL Amateur Sailing Club

• Assistance of the Wangi Bowling Club with shade • Sponsorship of Wangi Arcadia Netball Club for uniforms • Sponsorship of the Wangi Lions Club and the Wangi Beautifying Project • Toronto Learning Community Band Sponsorship for band equipment • Wangi Wangi RSL New years eve community fireworks • Wangi Amateur Sailing Club Youthsail Lake Macquarie Regatta which was held in

March 2012.

Myuna Colliery also supported corporate sponsorships for local sporting organisations, with sponsorship assistance for new equipment and operational costs. These sporting clubs include: Southern Lakes United Football, Southlakes Junior Rugby, Southern Lakes Rugby Union, Lake Macquarie Dockers, Westlakes District Netball and Macquarie Scorpions Rugby League.

The colliery also supported corporate sponsorship for community organisations and events including: The restoration of the Toronto RSL War Memorial, Speers Point Park Australia Day Festival, Morriset / Toronto Meals on Wheels, Dora Creek Rural Fire Brigade, theCircus Quirkus Event supporting Lake Macquarie children suffering from immune deficiencies, Hunter Rescue Helicopter West Cycle Classic, sponsorship and participation in the Rotary Club of Toronto Sunrise’s Paddlefest event, Hunter Life Education Australia Secondary high school program, the YMCA Lake Macquarie, Hunter Valley Research Foundation, Chuck


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Duck Breakfast Club Food supporting in need local school children, Lake Macquarie Classic Boatfest, Variety Club special children Christmas party, Wangi Wangi RSL Wheelchair convention, the Rathmines Catalina Festival, Hunter Medical Research Institute Capital Campaign and the Lake Macquarie City Council Seedling funding.


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5. Rehabilitation 5.1. Buildings

Myuna Colliery surface infrastructure is listed in detail in section 2.10 Surface Infrastructure.

No buildings were renovated, removed or rehabilitated during the AEMR period.

5.2. Rehabilitation of Disturbed Lands There was no disturbance of native vegetation during the reporting period. Rehabilitation of degraded areas caused by environmental weeds was systematically carried out during the reporting period, as part of land management practice.

5.3. Other infrastructure During the reporting period no surface exploration, new infrastructure, shafts, dams or fences were built, requiring rehabilitation works.

5.4. Rehabilitation Trials and Research No rehabilitation trials, research or initiatives were undertaken during the reporting period.

5.5. Further development of the Final Rehabilitation Plan All surface infrastructure associated with Myuna Colliery’s operations is located at the Surface Facilities Area. The Surface Facilities Area encompasses a footprint of approximately 89 hectares, of which 21 hectares includes the surface infrastructure. This 21 hectares is the total area currently requiring rehabilitation prior to mine closure. The remainder of the Surface Facilities Area is predominantly natural bushland vegetation, the Wangi Creek watercourse and existing cleared easement corridors.

The current MOP includes a conceptual final land use plan for the Surface Facilities Area. In accordance with Development Consent (10_0080), a Rehabilitation Management Plan will be prepared and submitted to the Director Mineral Resources within 12 months of Approval.


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6. Activities Proposed in the Next Reporting Period Planned activities for the next reporting year:

• Seek development approval under Part 3A of the NSW Environmental Planning & Assessment Act (1979) for Myuna Colliery’s Extension of Mining Environmental Assessment and complete actions from this process.

• Review and Development of Management Plans as per approval (10_0080) conditions.


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Table 15: Rehabilitation Summary Area Affected/Rehabilitated (hectares)

A MINE LEASE AREA

Total Area, start of MOP

Total Area, end of MOP

At mine closure (anticipated)

A1 Mine Lease(s) Area 6500ha 6500ha

B. DISTURBED AREAS

B1 Infrastructure Area (other disturbed areas to be rehabilitated at closure including facilities, roads)

21ha 21ha

B2: Active Mining Area

(excluding items B3-B5 below) Na Na

B3: Waste Emplacements

(active/unshaped/in or out-of-pit) Nil Nil

B4 Tailings Emplacements

(active/unshaped/uncapped) Nil Nil

B5 Shaped Waste Emplacement

(awaits final vegetation) Nil Nil

ALL DISTURBED AREAS 21ha 21ha

C. REHABILITATION

C1 Total Rehabilitated Area

(except for maintenance) Nil Nil Nil

D. REHABILITATION ON SLOPES

D1 10 to 18 Degrees Nil Nil Nil

D2 Greater than 18 degrees Nil Nil Nil

E: SURFACE OF REHABILITATED LAND

E1 Pasture and Grasses Nil Nil Nil

E2 Native Forest/Ecosystems 4ha 4ha 21ha

E3 Plantations and Crops Nil Nil Nil

E4 Other(include non-vegetative outcomes) Nil Nil Nil

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7. LIST OF PLANS MY11129 – Wallarah Seam Workings 1 Jan 2011 – 31 Dec 2011

MY11130 – Great Northern Seam Workings 1 Jan 2011 – 31 Dec 2011

MY11131 – Fassifern Seam Workings 1 Jan 2011 – 31 Dec 2011

MY10547 – Site Services Plan

MY10956 – Dust Management Plan

PC14 - Myuna Lease Area Plan

8. APPENDICES Appendix 1 - Myuna Colliery Environmental Risk Assessment

Appendix 2 – Myuna Colliery Annual Return (EPL 366)

Appendix 3 - DPI-MR Rehabilitation Cost Calculation

Appendix 1

Myuna Colliery

Environmental Risk Assessment

Site: Myuna Title: Annual Environmental Risk Assessment Stature ID:1000063013 Version: 2 Lifecycle State: Risk Assessment Made Effective

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Dyadem Stature for Risk Management: Risk Assessment Title: Annual Environmental Risk Assessment Version: 2 Region: North Site: Myuna Department: Surface Equipment / Process: Services Stature Risk Assessment No.: 1000063013 Study Lifecycle State: Risk Assessment Made Effective Potential Hazard No.: 19070 PULSE Actions Required URL: Site Risk Assessment Ref. No. (Optional):


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Executive Summary of Top 10 Risks Background Potential Incident RR

Surface water management There is a risk to Myuna from ::: Water discharge quality through LDP002 greater then licence limits. (TSS, pH, O&G, heavy metals) ::: Caused by: Algae content in the water or CHP Coal Spill or Failure of flocculation system (Mine water) or Failure of pollution control system (sumps full) or Heavy metal content in water or Heavy rainfall or High ash / clay levels in coal or Hydrocarbon spills / leaks or Overflow of compressor condensate 1,000Ltr temporary tank or Poor management in waste sorting area or Rainfall event or Underground machinery & equipment brought to the surface Resulting in: Community Complaints or Exceeding licence limits or Non-compliance wit Development Consent conditions or Pollution of waterways.

9 (H)

Surface water management There is a risk to Myuna from ::: Discharge from site exceeding quantity licence limits on LDP002 via the overflow pipe on the CHP Dam ::: Caused by: Heavy rainfall Resulting in: Exceeding licence limits.

14 (S)

Surface water management There is a risk to Myuna from ::: Unlicenced discharge of water from Coal Stockpile Dam ::: Caused by: Heavy rainfall or Insufficient pumping capacity Resulting in: Community Complaints or Exceeding licence limits or Non-compliance wit Development Consent conditions or Pollution of waterways.

17 (M)

Surface water management There is a risk to Myuna from ::: Water discharge quality through LDP001 greater then licence limits. (TSS, pH, O&G, heavy metals) ::: Caused by: Algae content in the water or Coal particles in water or Heavy metal content in water or High ash /

18 (M)


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Background Potential Incident RR clay levels in coal or Hydrocarbon spills / leaks Resulting in: Community Complaints or Exceeding licence limits or Non-compliance wit Development Consent conditions or Pollution of waterways.

Surface water management There is a risk to Myuna from ::: Contamination of stormwater system ::: Caused by: Bootwash or Failure of the oil separator system or Hydrocarbon spills / leaks or Leaking machinery in clean areas or Underground machinery & equipment brought to the surface or Vehicle movements or Vehicles coming to & from the site Resulting in: Community Complaints or Pollution of waterways.

18 (M)

Operation of oil / water separators There is a risk to Myuna from ::: High pollutant levels in discharge water in trade waste system ::: Caused by: Failure of the oil separator system or Hydrocarbon spills / leaks or Spillage of coal fines or Use & storage of chemicals Resulting in: Exceedence of Trade Waste Agreement conditions.

18 (M)

Transport of Machinery and Equipment to and from the site There is a risk to Myuna from ::: Coal spill on public road ::: Caused by: Improper preparation of machinery or equipment for transport Resulting in: Community Complaints or Injury to person(s) or Public Liability.

18 (M)

Transport of Machinery and Equipment to and from the site There is a risk to Myuna from ::: Hydrocarbon spill on Public road ::: Caused by: Improper preparation of machinery or equipment for transport Resulting in: Community Complaints or Injury to person(s) or Public Liability.

18 (M)

Transport of Machinery and Equipment to and from the site There is a risk to Myuna from 18


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Background Potential Incident RR ::: Loose objects falling from tranport machinery / equipment ::: Caused by: Improper preparation of machinery or equipment for transport Resulting in: Community Complaints or Injury to person(s) or Public Liability.

(M)

Mine land management There is a risk to Myuna from ::: Bushfire ::: Caused by: Accidental fire or Arson or Natural causes Resulting in: Damage to Flora & Fauna or Damage to infrastructure or Injury to person(s).

21 (L)

Surface water management There is a risk to Myuna from ::: Discharge from site exceeding quantity licence limits on LDP001 ::: Caused by: Increased pumping Resulting in: Exceeding licence limits.

21 (L)

Operation of oil / water separators There is a risk to Myuna from ::: Discharge of contaminated water into Stormwater ::: Caused by: Failure of pollution control system or Heavy rainfall Resulting in: Exceeding licence limits or Pollution of waterways.

21 (L)

Mining operations - includes underground and surface operations (excluding CHP). There is a risk to Myuna from ::: Subsidence greater then predicted levels ::: Caused by: Failure of mine design or Failure to follow mine design or Influence of natural events (earthquake etc) Resulting in: Adverse community impacts or Damage to Aboriginal or Cultural Artefacts / heritage or Damage

21 (L)


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Background Potential Incident RR to aquatic ecology, including seagrasses or Damage to Flora & Fauna or Damage to infrastructure or Damage to relationship with Aboriginal stakeholders.

Mining operations - includes underground and surface operations (excluding CHP). There is a risk to Myuna from ::: Groundwater contamination from Hydrocarbons ::: Caused by: Failure of pollution control system or Hydrocarbon spills / leaks or Old underground diesel tanks Resulting in: Damage to te environment or Exceedence of DECCW Guidelines.

21 (L)


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Executive Summary of Top 10 Severities Background Potential Incident MRC

Surface water management There is a risk to Myuna from ::: Water discharge quality through LDP002 greater then licence limits. (TSS, pH, O&G, heavy metals) ::: Caused by: Algae content in the water or CHP Coal Spill or Failure of flocculation system (Mine water) or Failure of pollution control system (sumps full) or Heavy metal content in water or Heavy rainfall or High ash / clay levels in coal or Hydrocarbon spills / leaks or Overflow of compressor condensate 1,000Ltr temporary tank or Poor management in waste sorting area or Rainfall event or Underground machinery & equipment brought to the surface Resulting in: Community Complaints or Exceeding licence limits or Non-compliance wit Development Consent conditions or Pollution of waterways.

3

Surface water management There is a risk to Myuna from ::: Unlicenced discharge of water from Coal Stockpile Dam ::: Caused by: Heavy rainfall or Insufficient pumping capacity Resulting in: Community Complaints or Exceeding licence limits or Non-compliance wit Development Consent conditions or Pollution of waterways.

3

Mine land management There is a risk to Myuna from ::: Bushfire ::: Caused by: Accidental fire or Arson or Natural causes Resulting in: Damage to Flora & Fauna or Damage to infrastructure or Injury to person(s).

4

Surface water management There is a risk to Myuna from ::: Water discharge quality through LDP001 greater then licence limits. (TSS, pH, O&G, heavy metals) ::: Caused by: Algae content in the water or Coal particles in water or Heavy metal content in water or High ash / clay levels in coal or Hydrocarbon spills / leaks

4


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Background Potential Incident MRC Resulting in: Community Complaints or Exceeding licence limits or Non-compliance wit Development Consent conditions or Pollution of waterways.

Surface water management There is a risk to Myuna from ::: Discharge from site exceeding quantity licence limits on LDP001 ::: Caused by: Increased pumping Resulting in: Exceeding licence limits.

4

Surface water management There is a risk to Myuna from ::: Discharge from site exceeding quantity licence limits on LDP002 via the overflow pipe on the CHP Dam ::: Caused by: Heavy rainfall Resulting in: Exceeding licence limits.

4

Surface water management There is a risk to Myuna from ::: Contamination of stormwater system ::: Caused by: Bootwash or Failure of the oil separator system or Hydrocarbon spills / leaks or Leaking machinery in clean areas or Underground machinery & equipment brought to the surface or Vehicle movements or Vehicles coming to & from the site Resulting in: Community Complaints or Pollution of waterways.

4

Operation of oil / water separators There is a risk to Myuna from ::: High pollutant levels in discharge water in trade waste system ::: Caused by: Failure of the oil separator system or Hydrocarbon spills / leaks or Spillage of coal fines or Use & storage of chemicals Resulting in: Exceedence of Trade Waste Agreement conditions.

4

Operation of oil / water separators There is a risk to Myuna from 4


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Background Potential Incident MRC ::: Discharge of contaminated water into Stormwater ::: Caused by: Failure of pollution control system or Heavy rainfall Resulting in: Exceeding licence limits or Pollution of waterways.

Mining operations - includes underground and surface operations (excluding CHP). There is a risk to Myuna from ::: Subsidence greater then predicted levels ::: Caused by: Failure of mine design or Failure to follow mine design or Influence of natural events (earthquake etc) Resulting in: Adverse community impacts or Damage to Aboriginal or Cultural Artefacts / heritage or Damage to aquatic ecology, including seagrasses or Damage to Flora & Fauna or Damage to infrastructure or Damage to relationship with Aboriginal stakeholders.

4

Mining operations - includes underground and surface operations (excluding CHP). There is a risk to Myuna from ::: Groundwater contamination from Hydrocarbons ::: Caused by: Failure of pollution control system or Hydrocarbon spills / leaks or Old underground diesel tanks Resulting in: Damage to te environment or Exceedence of DECCW Guidelines.

4

Transport of Machinery and Equipment to and from the site There is a risk to Myuna from ::: Coal spill on public road ::: Caused by: Improper preparation of machinery or equipment for transport Resulting in: Community Complaints or Injury to person(s) or Public Liability.

4

Transport of Machinery and Equipment to and from the site There is a risk to Myuna from ::: Hydrocarbon spill on Public road ::: Caused by: Improper preparation of machinery or equipment for transport

4


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Background Potential Incident MRC Resulting in: Community Complaints or Injury to person(s) or Public Liability.

Transport of Machinery and Equipment to and from the site There is a risk to Myuna from ::: Loose objects falling from tranport machinery / equipment ::: Caused by: Improper preparation of machinery or equipment for transport Resulting in: Community Complaints or Injury to person(s) or Public Liability.

4

Working offsite - surveyor work, exploration, etc There is a risk to Myuna from ::: Damage to Aboriginal & Cultural Heritage Items ::: Caused by: Clearing or Installation of subsidence pegs or Surface drilling or Vehicle movements Resulting in: Community Complaints or Damage to relationship with Aboriginal stakeholders or Legal liability or Non-compliance with Development Consent conditions.

4


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Study Approval Approver Approved / Rejected Date Comments

1. Veronica Warren

Approved February 08, 2012


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1. Background

The Department of Primary Industries (Mineral Resources) has included in the Mining Operations Plan (MOP) and Annual Environmental Management Report (AEMR) processes the requirement to undertake an environmental risk assessment of the operations. The purpose is to identify mine activities, processes and facilities which require control strategies to ensure environmental protection and compliance with conditions of the leases, licence(s) and development consent. To identify risks, consideration should be given to circumstances which may trigger or exacerbate risks from: intense rain or storm events; prolonged above average rain; drought; flood and inundation, wind, earthquake, fire, equipment breakdown, human error, and accidents. The Environmental Risk Assessment is reviewed annually to identify any new risks, controls implemented or changes in legislative requirements. In 2011 Myuna's Environmental protection Licence (EPL) was reviewed by the Office of Environment and Heritage, introducing additional and more stringent conditions on the monitoring requirements of the Colliery. In January 2012 Myuna colliery received Project Approval for the Myuna Colliery Extension of Mining allowing mining operations to continue until 31 December 2032.


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2. Objective The following Hierarchy of Controls offers a framework for considering the effectiveness of controls. Note that the effectiveness of a control that is intended to reduce a risk decreases from top to bottom of the list. In other words, the closer the control type is to the top of the hierarchy, the more potentially effective the control. ·Eliminate the hazard or energy source (do not use the energy) ·Minimise or replace the hazard or energy source (reduce the amount of energy to a less damaging level or replace the energy with another that has less potential negative consequences) ·Control the hazard or energy using engineered devices (ex. Lock outs, chemical containers, mechanical roof support, gas monitors, etc.) ·Control the hazard or energy by using physical barriers (ex. machine guarding, warning signs, etc.) ·Control the hazard or energy with procedures (ex. Isolation procedures, standard operating procedures, etc.) ·Control the hazard or energy with personal protective equipment (ex. hard hats, boots with toe caps, gloves, safety glasses, welding gear, etc.) ·Control the hazard or energy with warnings and awareness (ex. posters, labels, stickers, verbal warnings, etc.) The objective of this risk assessment is to meet the requirements of Section 6 of the DMR document titled "Guidelines to the Mining, Rehabilitation and Environment Management Process". To identify and assess the likelihood of occurrence and consequence of the environmental risks associated with Myuna Colliery, and to control the risks to people and the environment while conducting mining operations on Myuna lease holdings.


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3. Potential Hazards

Airborne dust Sedimentation of surrounding waterways Hydrocarbon contamination of the land Spontaneous combustion of coal stockpile Hydrocarbon and/or chemical pollution of ground water Infestation and/or spread of declared weeds Noise impacts on sensitive receivers Bushfire impacting on site operations Subsidence of land leading to injury to bush walkers and other persons. Subsidence impacting on surrounding vegetation/creeks Public vehicles coming into contact with mine trucks and machinery Member of the public falls into colliery dams/tanks.


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4a. Risk Assessment Boundary Definition

This risk assessment applies to the risks to the community and the environment from: Vehicle Movements around colliery Coal Stockpiling and loading Vehicle and machinery wash down area Transport and storage of Hydrocarbons and chemicals on site. (Hydrocarbon management) Disposal of sewage Control of weeds Shotfiring (Underground) Operational noise due to loading and transporting of product, etc Visual Stray Light Bushfire control Subsidence Mine operations, including U/G operations impacts on the surface, CHP, machinery movements, pumping, etc. Rehabilitation Discharging water from the site Transport of materials and waste Transport of machinery and equipment to and from the site


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4b. Boundary Definition


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5. Risk Assessment Methods

Yes/No Method Yes Workplace Risk Assessment and Control (WRAC)

Fault Tree Analysis (FTA)

Safety Integrity Level Analysis to Australian Standard 61508 (SIL)

Bow Tie Analysis (BTA)

Failure Modes and Effects Analysis (FMEA)

Hazard and Operability Analysis (HAZOP)


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6. Previous Risk Assessment and other documents to be used and/or referenced

Document Name Title Version Referenced Document Date Annual Environmental Risk Assessment 2011

Annual Environmental Risk Assessment 2011

2010 Environmental Risk Assessment Review

2010 Environmental Risk Assessment Review 1

Myuna Colliery - Assessment of Environmental Risks Review

Myuna Colliery - Assessment of Environmental Risks Review for 2008 and 2009

1 21-Jan-2009

Myuna Colliery - Assessment of Environmental Risks Review 18/12/07

Myuna Colliery - Assessment of Environmental Risks Review 18/12/07

1 18-Dec-2007

Risk Assessment Report 2004 Environmental Risk Assessment Report 2004 2 23-Feb-2005 Myuna Colliery Assessment of Environmental Risks 2003

Myuna Colliery Assessment of Environmental Risks 2003 3 20-Feb-2003


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7. Information Required for Risk Assessment (This page intentionally left blank)


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8. Venue and Time Date Description Location Start Time End Time Comment

1. 31-Jan-2012

Scoping Myuna Training Room 8:00 AM 8:30 AM

2. 31-Jan-2012

Assessment Myuna Training Room 8:30 AM 9:00 AM

3.

Review


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9. Risk Assessment Team Selection

Name Title Company Industry Start Date

Yrs. of Exp.

Mobile Phone # E-Mail Address

Pulse User No.

Role

Attendance 1.

31-Jan-2012

2. 31-

Jan-2012

3.

Arthur Kent Multiskilled Mineworker Myuna Colliery 08-Mar-1982 30 72039 (none) A pr

Veronica Warren Environment & Community Coordinator

Myuna Colliery 06-Aug-2007 5 [email protected]

70036 Facilitator P P

Brett Henderson Mechanical Engineer Myuna Colliery 11-Dec-1974 37 [email protected]

50016 P P

Barrie Alley Mine Electrical Engineer Myuna Colliery 03-Feb-1975 37 [email protected]

70000 P P

Greg Talbot Local Check Inspector Myuna Colliery 19-Jan-1981 31 72072 P P

Peter Nelson Engineering Superintendent Myuna Colliery 16-Jan-1975 37 [email protected]

70037 P P

Roger Davis Mine Manager Myuna Colliery 06-Nov-1978 33 [email protected]

110006 Risk Assessment Owner P P

Tim OReilly Production Manager Myuna Colliery 19-Jan-1980 32 0439 041 698 [email protected]

110002 P P

Mal Yule Technical Services Superintendent

Myuna Colliery 02-Apr-1977 35 [email protected]

70039 P P


21 of 59

10. Scope Confirmation Approver Scope Confirmation Date Comments

1. Veronica Warren

Yes January 31, 2012


22 of 59

WRAC Analysis Worksheet Step Potential Incident Current Controls L MRC RR Recommended Control Bow Tie

Extension 1. Coal Handling on the

surface. Includes CHP, stockpiling & handling.

There is a risk to Myuna from ::: High air pollution levels ::: Caused by: Coal Handling Plant Operations or Coal stockpiling & loading or Truck movements Resulting in: Community Complaints or Exceedence of DECCW Guidelines or Exceedence of Development Consent Conditions.

1.1.a. Speed limits / traffic control

C (Pb)

5 (L)

22 (L)

1.1.b. Enclosed surface conveyors & CHP

1.1.c. Dust deposition monitoring (External consultant)

1.1.d. Spot bobcat sweeper around CHP

1.1.e. Weekly vacuum sweeping 1.1.f. Dust Management Plan 1.1.g. Water tanker utilised when

transporting coal 1.1.h. Operate and maintain

suppression water sprays along conveyors, crushers, Coal Handling Plant

1.1.i. Sealed surface and roads 1.1.j. Minimal coal handling 1.1.k. Buffer zone between site &

residents There is a risk to Myuna from ::: Contamination of land ::: Caused by: Hydrocarbon spills / leaks or Rope greaser dripping or Spillage of coal fines or Surface transformers (including spare transformers) or Waste dumping area Resulting in: Community Complaints or Contaminated land or Exceedence of DECCW Guidelines.

1.2.a. Routinely clean CHP

C (Pb)

5 (F)

22 (L)

1.2.b. Hydrocarbon Management Plan

1.2.c. Emergency spills kits 1.2.d. Induction & training 1.2.e. Waste Management Plan 1.2.f. Contractors waste sorting

There is a risk to Myuna from ::: Contamination of water runoff into

1.3.a. Drain coverings C

(IF) 5

(L) 22 (L)

1.3.b. Heavy / large coal fines

collected by bobcat weekly


23 of 59

Step Potential Incident Current Controls L MRC RR Recommended Control Bow Tie Extension

CHP Dam ::: Caused by: Hydrocarbon spills / leaks or Rope greaser dripping or Spillage of coal fines or Storage of hydrocarbons in CHP or Storage of surplus plant and equipment or Surface transformers (including spare transformers) Resulting in: Community Complaints or Exceeding licence limits or Pollution of waterways.

1.3.c. Under / over weir in CHP dam 1.3.d. Drive in sump which traps

larger material 1.3.e. Oil booms installed 1.3.f. Routine week day / weekly

inspection 1.3.g. Transformers in operation are

bunded

There is a risk to Myuna from ::: High noise levels ::: Caused by: Alarms - Belt, Shift alarms, Metal detector etc or Coal Handling Plant Operations or Coal stockpiling & loading or Doors being open on CHP or Temperature Inversion or Truck movements or Vehicle movements Resulting in: Community Complaints or Exceedence of DECCW Guidelines or Exceedence of Development Consent Conditions.

1.4.a. Material handling predominantly during daylight hours

D (Pb)

5 (R)

24 (L)

1.4.b. Buffer zone between site & residents

1.4.c. PLC automatic control on bin levels to minimise 'run empty' operations

1.4.d. Doors installed on CHP 1.4.e. Fully enclosed coal handling

plant

There is a risk to Myuna from ::: Spontaneous Combustion (surface stockpiling). ::: Caused by: Stockpiling coal for long periods of time Resulting in: Community Complaints or Damage to infrastructure or Exceedence of Development Consent Conditions or Fire.

1.5.a. Stockpile area generally empty - utilised only for emergency stockpiling

D (Op)

5 (F)

24 (L)

5. Develop SWP for regular inspection for spontaneous combustion when coal is stockpiled.

2. Operation of Ventilation There is a risk to Myuna from 2.1.a. Dust scrubbers on continuous E 5 25


24 of 59


system & upcast shaft

::: High air pollution levels ::: Caused by: Fire underground or Increased ventilation or Natural causes - roof fall, earthquake etc or Underground vehicle movements Resulting in: Community Complaints or Exceedence of DECCW Guidelines or Exceedence of Development Consent Conditions.

miners (Pb) (R) (L) 2.1.b. Spray systems on underground

conveyor belts 2.1.c. Distance between production

panels and upcast shaft (allows dust to settle from ventilation current to upcast shaft)

2.1.d. Stringent underground monitoring and inspections for early fire detection

2.1.e. Naturally wet mine 2.1.f. Mine Health & Safety

Management System 2.1.g. Trained fire response team

There is a risk to Myuna from ::: Green house gas emissions ::: Caused by: CO2 levels underground or Methane levels underground Resulting in: Change in operating costs due to the carbon tax or Increasing the sites contribution to the climate change.

2.2.a. Ventilation monitoring

E (IF)

5 (F)

25 (L)

6. Investigate options for sealing and flooding areas underground to decrease greenhouse gas emissions

3. Mine land management

There is a risk to Myuna from ::: Erosion of soils ::: Caused by: Fire trails not being maintained or Heavy rainfall or Poor rehabilitation or Poor water management or Vehicle movements Resulting in: Degredation of land or Exceeding licence limits or Fire trails untrafficable or Non-compliance with Leases & Consents or Pollution of waterways.

3.1.a. Rehabilitation of areas as required to minimise exposed areas

D (IF)

5 (E)

24 (L)

3.1.b. Limited disturbance of land 3.1.c. Limited traffic movements on

unsealed areas 3.1.d. Mulching of unvegetated areas3.1.e. Sediment control fencing 3.1.f. Bushfire Management Plan -

includes inspection & maintenance of fire trails.

3.1.g. Buffer zones vegetated 3.1.h. Minimal fire trails onsite

There is a risk to Myuna from 3.2.a. Hydrocarbon Management E 5 25


25 of 59


::: Contamination of land ::: Caused by: Hydrocarbon spills / leaks or Vehicle movements Resulting in: Exceedence of DECCW Guidelines.

Plan (Pb) (F) (L) 3.2.b. Emergency spills kits 3.2.c. Designated areas for

maintenance on machines 3.2.d. Limited traffic movements on

unsealed areas 3.2.e. Limited access

There is a risk to Myuna from ::: Damage to flora & Fauna ::: Caused by: Bushfire Management or Clearing or Diversion drains or Fire or Vehicle movements or Weed and pest control Resulting in: Community Complaints or Damage to Flora & Fauna or Non-compliance with Leases & Consents.

3.3.a. Tetratheca Juncea only threatened species identified onsite

E (D)

5 (E)

25 (L)

3.3.b. Land Management Plan 3.3.c. Bushfire Management Plan 3.3.d. Weed and Pest Management

Plan 3.3.e. Flora Surveys completed for

diversion drains

There is a risk to Myuna from ::: Weed & pest infestation (& impacts on native vegetation) ::: Caused by: Improper weed and pest management or Vehicle movements Resulting in: Degredation of land.

3.4.a. Selective pesticides used

D (Pb)

5 (E)

24 (L)

3.4.b. Limited traffic movements on unsealed areas

3.4.c. Weed and Pest Management Plan

3.4.d. Land Management Plan 3.4.e. Weed action plan developed

for the site

There is a risk to Myuna from ::: Bushfire ::: Caused by: Accidental fire or Arson or Natural causes Resulting in: Damage to Flora & Fauna or Damage to infrastructure or Injury to person(s).

3.5.a. Buffer zone between site & residents

D (Pb)

4 (F)

21 (L)

3.5.b. Bushfire Management Plan - includes inspection & maintenance of fire trails.

3.5.c. Boundary fence slashing conducted routinely

3.5.d. Boundary fence to limit access to site

3.5.e. Wangi NSW Fire Brigade


26 of 59


routinely perform fuel assessments onsite & controlled back burning when required.

4. Surface water management

There is a risk to Myuna from ::: Water discharge quality through LDP001 greater then licence limits. (TSS, pH, O&G, heavy metals) ::: Caused by: Algae content in the water or Coal particles in water or Heavy metal content in water or High ash / clay levels in coal or Hydrocarbon spills / leaks Resulting in: Community Complaints or Exceeding licence limits or Non-compliance wit Development Consent conditions or Pollution of waterways.

4.1.a. Water Management Plan

C (Pb)

4 (L)

18 (M)

2. Install continuous monitoring equipment with automatic alarm functions incorporated on discharge points

4.1.b. Underground water settlement and storage

4.1.c. Mon - Fri Inspection / weekly inspection

4.1.d. Oil booms installed 4.1.e. Daily monitoring conducted by

external consultant. 4.1.f. Dam cleaned out to remove

sediment and weed.

There is a risk to Myuna from ::: Discolouration of discharge from LDP001 ::: Caused by: Failure to dilute Fassifern discharge or High iron and manganese content in Fassifern seam Resulting in: Community Complaints or Pollution of waterways.

4.2.a. Mon - Fri Inspection / weekly inspection

C (D)

5 (E)

22 (L)

4.2.b. CITECT interlocked to prevent Fassifern seam from running alone

There is a risk to Myuna from ::: Water discharge quality through LDP002 greater then licence limits. (TSS, pH, O&G, heavy metals) ::: Caused by: Algae content in the water or CHP Coal Spill or Failure of flocculation


B (D)

3 (L)

9 (H)

1. Investigate opportunity to install an oil / water separator on sump before CHP Dam.

4.3.b. Induction & training



7. Repairs to coal handling plant cladding

4.3.d. Oil booms installed 8. Investigate alternate methods of capturing washdown fine at source in coal plant.

4.3.e. Daily monitoring conducted by


27 of 59


system (Mine water) or Failure of pollution control system (sumps full) or Heavy metal content in water or Heavy rainfall or High ash / clay levels in coal or Hydrocarbon spills / leaks or Overflow of compressor condensate 1,000Ltr temporary tank or Poor management in waste sorting area or Rainfall event or Underground machinery & equipment brought to the surface Resulting in: Community Complaints or Exceeding licence limits or Non-compliance wit Development Consent conditions or Pollution of waterways.

external consultant. 4.3.f. Annual coal fine removal from

CHP dam 4.3.g. Emergency spills kits 4.3.h. Designated / bunded

hydrocarbon storage areas 4.3.i. Designated areas for

maintenance on machines 4.3.j. Drive in sump traps larger

material 4.3.k. Weekly vacuum sweeping 4.3.l. Heavy / large fine collected by

bobcat weekly 4.3.m. Routinely clean CHP 4.3.n. Under / over weir in CHP dam 4.3.o. Spot bobcat sweeper around

CHP There is a risk to Myuna from ::: Discharge from site exceeding quantity licence limits on LDP001 ::: Caused by: Increased pumping Resulting in: Exceeding licence limits.

4.4.a. Flow monitoring devices on underground pumping system with alarm to citect

D (Pb)

4 (L)

21 (L)

4.4.b. Pump capacity underground is

less then discharge volume.

There is a risk to Myuna from ::: Discharge from site exceeding quantity licence limits on LDP002 via the overflow pipe on the CHP Dam ::: Caused by: Heavy rainfall Resulting in: Exceeding licence limits.

4.5.a. LDP002 designed to discharge (83mm diameter) maximum of 1ML/day

B (Pb)

4 (L)

14 (S)

9. Investigate blocking Overflow pipe from CHP Dam, and diverting into LDP001 via mine dams.

There is a risk to Myuna from ::: Unlicenced discharge of water from

4.6.a. Small diesel pump on stockpile dam which pumps to Mine water dams.

D (Pb)

3 (L)

17 (M)

3. Investigate possibility of installing automatic pump with greater pumping capacity, & possibility of level monitoring on the coal pad dam.


28 of 59


Coal Stockpile Dam ::: Caused by: Heavy rainfall or Insufficient pumping capacity Resulting in: Community Complaints or Exceeding licence limits or Non-compliance wit Development Consent conditions or Pollution of waterways.

4.6.b. Clean water diversions drains around coal stockpile.

10. Investigate possibility of draining coal pad dam to underground workings via surface borehole.

There is a risk to Myuna from ::: Contamination of stormwater system ::: Caused by: Bootwash or Failure of the oil separator system or Hydrocarbon spills / leaks or Leaking machinery in clean areas or Underground machinery & equipment brought to the surface or Vehicle movements or Vehicles coming to & from the site Resulting in: Community Complaints or Pollution of waterways.

4.7.a. Stormwater sump

C (Pb)

4 (L)

18 (M)

11. Investigate installation of oil separator system on stormwater drain.

4.7.b. Over / under weir 4.7.c. Emergency spills kits 4.7.d. Training in spill response

5. Operation of oil / water separators

There is a risk to Myuna from ::: High pollutant levels in discharge water in trade waste system ::: Caused by: Failure of the oil separator system or Hydrocarbon spills / leaks or Spillage of coal fines or Use & storage of chemicals Resulting in: Exceedence of Trade Waste Agreement conditions.

5.1.a. System connected to CITECT to monitor levels

C (Pb)

4 (L)

18 (M)

5.1.b. Annual analysis completed for compliance against trade waste agreement


5.1.d. Maintenance on oil separator quarterly (generated from WO pulse system)

There is a risk to Myuna from


D (Pb)

4 (L)

21 (L)


29 of 59


::: Discharge of contaminated water into Stormwater ::: Caused by: Failure of pollution control system or Heavy rainfall Resulting in: Exceeding licence limits or Pollution of waterways.

5.2.b. Mon - Fri Inspection / weekly inspection

5.2.c. Annual analysis completed for compliance against trade waste agreement


6. Mining operations - includes underground and surface operations (excluding CHP).

There is a risk to Myuna from ::: Subsidence greater then predicted levels ::: Caused by: Failure of mine design or Failure to follow mine design or Influence of natural events (earthquake etc) Resulting in: Adverse community impacts or Damage to Aboriginal or Cultural Artefacts / heritage or Damage to aquatic ecology, including seagrasses or Damage to Flora & Fauna or Damage to infrastructure or Damage to relationship with Aboriginal stakeholders.

6.1.a. Mine Design system

D (Pb)

4 (L)

21 (L)

6.1.b. Appropriate regulatory approval granted prior to mining commencing

6.1.c. Ongoing subsidence monitoring

There is a risk to Myuna from ::: Groundwater contamination from Hydrocarbons ::: Caused by: Failure of pollution control system or Hydrocarbon spills / leaks or Old underground diesel tanks Resulting in: Damage to te environment or Exceedence of DECCW Guidelines.

6.2.a. Washdown of equipment in designated "dirty areas"

D (Pb)

4 (F)

21 (L)

4. Follow up on actions required for decommissioning underground diesel tanks.

6.2.b. Environmental awareness training

6.2.c. Emergency spills kits 6.2.d. Surface transport management

system 6.2.e. Above ground diesel and oil

tanks onsite 6.2.f. Bunded hydrocarbon storage

areas


6.3.a. Operator training to minimise noise

C (Pb)

5 (R)

22 (L)


30 of 59


::: High noise levels ::: Caused by: Alarms - Belt, Shift alarms, Metal detector etc or Alarms on vehicles and machinery or Emergency services response (Ambulance, Helicopter etc) or Underground machinery & equipment brought to the surface or Vehicle movements or Vehicles coming to & from the site Resulting in: Community Complaints or Exceedence of DECCW Guidelines or Exceedence of Development Consent Conditions.

6.3.b. Minimal heavy equipment use on surface

6.3.c. Buffer zone between site & residents

There is a risk to Myuna from ::: Visual stray light ::: Caused by: Environmental conditions - cloud cover or Lighting of surface infrastructure at night or Vehicle movements or Vehicles coming to & from the site Resulting in: Community Complaints or Exceedence of Development Consent Conditions.


E (Pb)

5 (R)

25 (L)

6.4.b. Lights designed to reduce light leaving site

7. Transport of Machinery and Equipment to and from the site

There is a risk to Myuna from ::: Coal spill on public road ::: Caused by: Improper preparation of machinery or equipment for transport Resulting in: Community Complaints or Injury to person(s) or Public Liability.

7.1.a. Washdown Bay area

C (Pb)

4 (L)

18 (M)

12. Review procedure for equipment and machinery coming and leaving the colliery.

7.1.b. Procedure for Equipment and machinery leaving site

13. Training of personnel on procedure for equipment and machinery leaving the Colliery.

There is a risk to Myuna from ::: Hydrocarbon spill on Public road :::

7.2.a. Procedure for Equipment and machinery leaving site

C (Pb)

4 (L)

18 (M)




31 of 59


Caused by: Improper preparation of machinery or equipment for transport Resulting in: Community Complaints or Injury to person(s) or Public Liability. There is a risk to Myuna from ::: Loose objects falling from tranport machinery / equipment ::: Caused by: Improper preparation of machinery or equipment for transport Resulting in: Community Complaints or Injury to person(s) or Public Liability.


C (Pb)

4 (L)

18 (M)


7.3.b. Transport drivers inspect loads to meet RTA standards before leaving site.


8. Working offsite - surveyor work, exploration, etc

There is a risk to Myuna from ::: Damage to flora & Fauna ::: Caused by: Clearing or Installation of subsidence pegs or Surface drilling or Vehicle movements Resulting in: Community Complaints or Legal liability or Non-compliance wit Development Consent conditions or Non-compliance with REF - NPWS.

8.1.a. REF's and appropriate approvals received prior to conducting works

E (Pb)

5 (E)

25 (L)

8.1.b. Offsite surface disturbance procedures

8.1.c. Minimal work conducted offsite

There is a risk to Myuna from ::: Damage to Aboriginal & Cultural Heritage Items ::: Caused by: Clearing or Installation of subsidence pegs or Surface drilling or Vehicle movements Resulting in:


E (Pb)

4 (R)

23 (L)

8.2.b. Offsite surface disturbance

procedures 8.2.c. Aboriginal studies completed

as part of the REF process


32 of 59


Community Complaints or Damage to relationship with Aboriginal stakeholders or Legal liability or Non-compliance with Development Consent conditions.

9. Shotfiring (Undergound)

There is a risk to Myuna from ::: Unplanned Surface movement / vibration ::: Caused by: Depth of cover or Poor design of shotfiring or proximity to residential area Resulting in: Community Complaints or Exceedence of DECCW Guidelines or Non-compliance with Development Consent conditions.

9.1.a. Shotfiring management plan

D (Pb)

5 (R)

24 (L)

9.1.b. Limited amount of shotfiring occurs on colliery


33 of 59

WRAC Analysis Sorted by RR Step Potential Incident Current Controls L MRC RR Recommended Control


There is a risk to Myuna from ::: Water discharge quality through LDP002 greater then licence limits. (TSS, pH, O&G, heavy metals) ::: Caused by: Algae content in the water or CHP Coal Spill or Failure of flocculation system (Mine water) or Failure of pollution control system (sumps full) or Heavy metal content in water or Heavy rainfall or High ash / clay levels in coal or Hydrocarbon spills / leaks or Overflow of compressor condensate 1,000Ltr temporary tank or Poor management in waste sorting area or Rainfall event or Underground machinery & equipment brought to the surface Resulting in: Community Complaints or Exceeding licence limits or Non-compliance wit Development Consent conditions or Pollution of waterways.


B (D)

3 (L)

9 (H)







4.3.e. Daily monitoring conducted by external consultant.

4.3.f. Annual coal fine removal from CHP dam

4.3.g. Emergency spills kits 4.3.h. Designated / bunded



material 4.3.k. Weekly vacuum sweeping 4.3.l. Heavy / large fine collected

by bobcat weekly 4.3.m. Routinely clean CHP 4.3.n. Under / over weir in CHP

dam 4.3.o. Spot bobcat sweeper around

CHP 4. Surface water

management



B (Pb)

4 (L)

14 (S)



34 of 59

Step Potential Incident Current Controls L MRC RR Recommended Control 4. Surface water

management

There is a risk to Myuna from ::: Unlicenced discharge of water from Coal Stockpile Dam ::: Caused by: Heavy rainfall or Insufficient pumping capacity Resulting in: Community Complaints or Exceeding licence limits or Non-compliance wit Development Consent conditions or Pollution of waterways.


D (Pb)

3 (L)

17 (M)





There is a risk to Myuna from ::: Water discharge quality through LDP001 greater then licence limits. (TSS, pH, O&G, heavy metals) ::: Caused by: Algae content in the water or Coal particles in water or Heavy metal content in water or High ash / clay levels in coal or Hydrocarbon spills / leaks Resulting in: Community Complaints or Exceeding licence limits or Non-compliance wit Development Consent conditions or Pollution of waterways.


C (Pb)

4 (L)

18 (M)




4.1.d. Oil booms installed 4.1.e. Daily monitoring conducted

by external consultant. 4.1.f. Dam cleaned out to remove

sediment and weed.


There is a risk to Myuna from ::: Contamination of stormwater system ::: Caused by: Bootwash or Failure of the oil separator system or Hydrocarbon spills / leaks or Leaking machinery in clean areas or Underground machinery & equipment brought to the surface or Vehicle movements or Vehicles coming to & from the site


C (Pb)

4 (L)

18 (M)




35 of 59

Step Potential Incident Current Controls L MRC RR Recommended Control Resulting in: Community Complaints or Pollution of waterways.


There is a risk to Myuna from ::: High pollutant levels in discharge water in trade waste system ::: Caused by: Failure of the oil separator system or Hydrocarbon spills / leaks or Spillage of coal fines or Use & storage of chemicals Resulting in: Exceedence of Trade Waste Agreement conditions.


C (Pb)

4 (L)

18 (M)





There is a risk to Myuna from ::: Coal spill on public road ::: Caused by: Improper preparation of machinery or equipment for transport Resulting in: Community Complaints or Injury to person(s) or Public Liability.


C (Pb)

4 (L)

18 (M)





There is a risk to Myuna from ::: Hydrocarbon spill on Public road ::: Caused by: Improper preparation of machinery or equipment for transport Resulting in: Community Complaints or Injury to person(s) or Public Liability.


C (Pb)

4 (L)

18 (M)




There is a risk to Myuna from ::: Loose objects falling from tranport machinery / equipment ::: Caused by:


C (Pb)

4 (L)

18 (M)





36 of 59

Step Potential Incident Current Controls L MRC RR Recommended Control Improper preparation of machinery or equipment for transport Resulting in: Community Complaints or Injury to person(s) or Public Liability.




D (Pb)

4 (F)

21 (L)

3.5.b. Bushfire Management Plan -includes inspection & maintenance of fire trails.



3.5.e. Wangi NSW Fire Brigade routinely perform fuel assessments onsite & controlled back burning when required.


There is a risk to Myuna from ::: Discharge from site exceeding quantity licence limits on LDP001 ::: Caused by: Increased pumping Resulting in: Exceeding licence limits.


D (Pb)

4 (L)

21 (L)

4.4.b. Pump capacity underground is less then discharge volume.


There is a risk to Myuna from ::: Discharge of contaminated water into Stormwater ::: Caused by: Failure of pollution control system or Heavy rainfall Resulting in: Exceeding licence limits or Pollution of waterways.


D (Pb)

4 (L)

21 (L)




6. Mining operations - includes underground


6.1.a. Mine Design system D (Pb)

4 (L)

21 (L)

6.1.b. Appropriate regulatory


37 of 59

Step Potential Incident Current Controls L MRC RR Recommended Control and surface operations (excluding CHP).

::: Subsidence greater then predicted levels ::: Caused by: Failure of mine design or Failure to follow mine design or Influence of natural events (earthquake etc) Resulting in: Adverse community impacts or Damage to Aboriginal or Cultural Artefacts / heritage or Damage to aquatic ecology, including seagrasses or Damage to Flora & Fauna or Damage to infrastructure or Damage to relationship with Aboriginal stakeholders.

approval granted prior to mining commencing





D (Pb)

4 (F)

21 (L)



6.2.c. Emergency spills kits 6.2.d. Surface transport

management system 6.2.e. Above ground diesel and oil


areas

1. Coal Handling on the surface. Includes CHP, stockpiling & handling.



C (Pb)

5 (L)

22 (L)

1.1.b. Enclosed surface conveyors

& CHP 1.1.c. Dust deposition monitoring

(External consultant) 1.1.d. Spot bobcat sweeper around

CHP 1.1.e. Weekly vacuum sweeping 1.1.f. Dust Management Plan 1.1.g. Water tanker utilised when


suppression water sprays along conveyors, crushers,


38 of 59

Step Potential Incident Current Controls L MRC RR Recommended Control Coal Handling Plant

1.1.i. Sealed surface and roads 1.1.j. Minimal coal handling 1.1.k. Buffer zone between site &

residents 1. Coal Handling on the


There is a risk to Myuna from ::: Contamination of land ::: Caused by: Hydrocarbon spills / leaks or Rope greaser dripping or Spillage of coal fines or Surface transformers (including spare transformers) or Waste dumping area Resulting in: Community Complaints or Contaminated land or Exceedence of DECCW Guidelines.


C (Pb)

5 (F)

22 (L)

1.2.b. Hydrocarbon Management

Plan 1.2.c. Emergency spills kits 1.2.d. Induction & training 1.2.e. Waste Management Plan 1.2.f. Contractors waste sorting


There is a risk to Myuna from ::: Contamination of water runoff into CHP Dam ::: Caused by: Hydrocarbon spills / leaks or Rope greaser dripping or Spillage of coal fines or Storage of hydrocarbons in CHP or Storage of surplus plant and equipment or Surface transformers (including spare transformers) Resulting in: Community Complaints or Exceeding licence limits or Pollution of waterways.

1.3.a. Drain coverings

C (IF)

5 (L)

22 (L)


collected by bobcat weekly 1.3.c. Under / over weir in CHP

dam 1.3.d. Drive in sump which traps


inspection 1.3.g. Transformers in operation

are bunded


There is a risk to Myuna from ::: Discolouration of discharge from LDP001 ::: Caused by: Failure to dilute Fassifern discharge or High iron and manganese content

4.2.a. Mon - Fri Inspection / weeklyinspection

C (D)

5 (E)

22 (L)



39 of 59

Step Potential Incident Current Controls L MRC RR Recommended Control in Fassifern seam Resulting in: Community Complaints or Pollution of waterways.


There is a risk to Myuna from ::: High noise levels ::: Caused by: Alarms - Belt, Shift alarms, Metal detector etc or Alarms on vehicles and machinery or Emergency services response (Ambulance, Helicopter etc) or Underground machinery & equipment brought to the surface or Vehicle movements or Vehicles coming to & from the site Resulting in: Community Complaints or Exceedence of DECCW Guidelines or Exceedence of Development Consent Conditions.


C (Pb)

5 (R)

22 (L)




There is a risk to Myuna from ::: Damage to Aboriginal & Cultural Heritage Items ::: Caused by: Clearing or Installation of subsidence pegs or Surface drilling or Vehicle movements Resulting in: Community Complaints or Damage to relationship with Aboriginal stakeholders or Legal liability or Non-compliance with Development Consent conditions.


E (Pb)

4 (R)

23 (L)


8.2.c. Aboriginal studies completed as part of the REF process


There is a risk to Myuna from ::: High noise levels ::: Caused by:

1.4.a. Material handling predominantly during daylight hours D

(Pb) 5

(R) 24 (L)



40 of 59

Step Potential Incident Current Controls L MRC RR Recommended Control Alarms - Belt, Shift alarms, Metal detector etc or Coal Handling Plant Operations or Coal stockpiling & loading or Doors being open on CHP or Temperature Inversion or Truck movements or Vehicle movements Resulting in: Community Complaints or Exceedence of DECCW Guidelines or Exceedence of Development Consent Conditions.



plant


There is a risk to Myuna from ::: Spontaneous Combustion (surface stockpiling). ::: Caused by: Stockpiling coal for long periods of time Resulting in: Community Complaints or Damage to infrastructure or Exceedence of Development Consent Conditions or Fire.


D (Op)

5 (F)

24 (L)



There is a risk to Myuna from ::: Erosion of soils ::: Caused by: Fire trails not being maintained or Heavy rainfall or Poor rehabilitation or Poor water management or Vehicle movements Resulting in: Degredation of land or Exceeding licence limits or Fire trails untrafficable or Non-compliance with Leases & Consents or Pollution of waterways.

3.1.a. Rehabilitation of areas as required to minimise exposed areas

D (IF)

5 (E)

24 (L)


unsealed areas 3.1.d. Mulching of unvegetated

areas 3.1.e. Sediment control fencing 3.1.f. Bushfire Management Plan -




There is a risk to Myuna from ::: Weed & pest infestation (& impacts

3.4.a. Selective pesticides used D

(Pb) 5

(E) 24 (L)

3.4.b. Limited traffic movements on

unsealed areas


41 of 59

Step Potential Incident Current Controls L MRC RR Recommended Control on native vegetation) ::: Caused by: Improper weed and pest management or Vehicle movements Resulting in: Degredation of land.

3.4.c. Weed and Pest Management Plan

3.4.d. Land Management Plan 3.4.e. Weed action plan developed

for the site


There is a risk to Myuna from ::: Unplanned Surface movement / vibration ::: Caused by: Depth of cover or Poor design of shotfiring or proximity to residential area Resulting in: Community Complaints or Exceedence of DECCW Guidelines or Non-compliance with Development Consent conditions.

9.1.a. Shotfiring management plan

D (Pb)

5 (R)

24 (L)

9.1.b. Limited amount of shotfiring

occurs on colliery

2. Operation of Ventilation system & upcast shaft

There is a risk to Myuna from ::: High air pollution levels ::: Caused by: Fire underground or Increased ventilation or Natural causes - roof fall, earthquake etc or Underground vehicle movements Resulting in: Community Complaints or Exceedence of DECCW Guidelines or Exceedence of Development Consent Conditions.

2.1.a. Dust scrubbers on continuous miners

E (Pb)

5 (R)

25 (L)

2.1.b. Spray systems on underground conveyor belts

2.1.c. Distance between production panels and upcast shaft (allows dust to settle from ventilation current to upcast shaft)





There is a risk to Myuna from ::: Green house gas emissions ::: Caused by:


E (IF)

5 (F)

25 (L)



42 of 59

Step Potential Incident Current Controls L MRC RR Recommended Control CO2 levels underground or Methane levels underground Resulting in: Change in operating costs due to the carbon tax or Increasing the sites contribution to the climate change.


There is a risk to Myuna from ::: Contamination of land ::: Caused by: Hydrocarbon spills / leaks or Vehicle movements Resulting in: Exceedence of DECCW Guidelines.

3.2.a. Hydrocarbon Management Plan

E (Pb)

5 (F)

25 (L)

3.2.b. Emergency spills kits 3.2.c. Designated areas for






E (D)

5 (E)

25 (L)

3.3.b. Land Management Plan 3.3.c. Bushfire Management Plan 3.3.d. Weed and Pest

Management Plan 3.3.e. Flora Surveys completed for

diversion drains




E (Pb)

5 (R)

25 (L)



43 of 59

Step Potential Incident Current Controls L MRC RR Recommended Control 8. Working offsite -

surveyor work, exploration, etc



E (Pb)

5 (E)

25 (L)




44 of 59

WRAC Analysis Sorted by Consequence Step Potential Incident Current Controls L MRC RR Recommended Control


There is a risk to Myuna from ::: Water discharge quality through LDP002 greater then licence limits. (TSS, pH, O&G, heavy metals) ::: Caused by: Algae content in the water or CHP Coal Spill or Failure of flocculation system (Mine water) or Failure of pollution control system (sumps full) or Heavy metal content in water or Heavy rainfall or High ash / clay levels in coal or Hydrocarbon spills / leaks or Overflow of compressor condensate 1,000Ltr temporary tank or Poor management in waste sorting area or Rainfall event or Underground machinery & equipment brought to the surface Resulting in: Community Complaints or Exceeding licence limits or Non-compliance wit Development Consent conditions or Pollution of waterways.


B (D)

3 (L)

9 (H)







4.3.e. Daily monitoring conducted by external consultant.

4.3.f. Annual coal fine removal from CHP dam

4.3.g. Emergency spills kits 4.3.h. Designated / bunded



material 4.3.k. Weekly vacuum sweeping 4.3.l. Heavy / large fine collected by

bobcat weekly 4.3.m. Routinely clean CHP 4.3.n. Under / over weir in CHP dam4.3.o. Spot bobcat sweeper around

CHP 4. Surface water

management

There is a risk to Myuna from ::: Unlicenced discharge of water from Coal Stockpile Dam ::: Caused by: Heavy rainfall or Insufficient pumping capacity Resulting in: Community Complaints or Exceeding licence limits or Non-compliance wit Development Consent conditions or


D (Pb)

3 (L)

17 (M)





45 of 59

Step Potential Incident Current Controls L MRC RR Recommended Control Pollution of waterways.




D (Pb)

4 (F)

21 (L)

3.5.b. Bushfire Management Plan - includes inspection & maintenance of fire trails.



3.5.e. Wangi NSW Fire Brigade routinely perform fuel assessments onsite & controlled back burning when required.




D (Pb)

4 (F)

21 (L)



6.2.c. Emergency spills kits 6.2.d. Surface transport

management system 6.2.e. Above ground diesel and oil


areas


There is a risk to Myuna from ::: Water discharge quality through LDP001 greater then licence limits. (TSS, pH, O&G, heavy metals) ::: Caused by: Algae content in the water or Coal particles in water or Heavy metal content in water or High ash / clay levels in coal or Hydrocarbon spills / leaks Resulting in: Community Complaints or Exceeding licence limits or Non-compliance wit


C (Pb)

4 (L)

18 (M)




4.1.d. Oil booms installed 4.1.e. Daily monitoring conducted by

external consultant. 4.1.f. Dam cleaned out to remove

sediment and weed.


46 of 59

Step Potential Incident Current Controls L MRC RR Recommended Control Development Consent conditions or Pollution of waterways.


There is a risk to Myuna from ::: Discharge from site exceeding quantity licence limits on LDP001 ::: Caused by: Increased pumping Resulting in: Exceeding licence limits.


D (Pb)

4 (L)

21 (L)

4.4.b. Pump capacity underground is less then discharge volume.




B (Pb)

4 (L)

14 (S)



There is a risk to Myuna from ::: Contamination of stormwater system ::: Caused by: Bootwash or Failure of the oil separator system or Hydrocarbon spills / leaks or Leaking machinery in clean areas or Underground machinery & equipment brought to the surface or Vehicle movements or Vehicles coming to & from the site Resulting in: Community Complaints or Pollution of waterways.


C (Pb)

4 (L)

18 (M)




There is a risk to Myuna from ::: High pollutant levels in discharge water in trade waste system :::


C (Pb)

4 (L)

18 (M)



47 of 59

Step Potential Incident Current Controls L MRC RR Recommended Control Caused by: Failure of the oil separator system or Hydrocarbon spills / leaks or Spillage of coal fines or Use & storage of chemicals Resulting in: Exceedence of Trade Waste Agreement conditions.




There is a risk to Myuna from ::: Discharge of contaminated water into Stormwater ::: Caused by: Failure of pollution control system or Heavy rainfall Resulting in: Exceeding licence limits or Pollution of waterways.


D (Pb)

4 (L)

21 (L)





There is a risk to Myuna from ::: Subsidence greater then predicted levels ::: Caused by: Failure of mine design or Failure to follow mine design or Influence of natural events (earthquake etc) Resulting in: Adverse community impacts or Damage to Aboriginal or Cultural Artefacts / heritage or Damage to aquatic ecology, including seagrasses or Damage to Flora & Fauna or Damage to infrastructure or Damage to relationship with Aboriginal stakeholders.

6.1.a. Mine Design system

D (Pb)

4 (L)

21 (L)

6.1.b. Appropriate regulatory

approval granted prior to mining commencing



There is a risk to Myuna from ::: Coal spill on public road ::: Caused by: Improper preparation of machinery or


C (Pb)

4 (L)

18 (M)





48 of 59

Step Potential Incident Current Controls L MRC RR Recommended Control equipment for transport Resulting in: Community Complaints or Injury to person(s) or Public Liability.


There is a risk to Myuna from ::: Hydrocarbon spill on Public road ::: Caused by: Improper preparation of machinery or equipment for transport Resulting in: Community Complaints or Injury to person(s) or Public Liability.


C (Pb)

4 (L)

18 (M)




There is a risk to Myuna from ::: Loose objects falling from tranport machinery / equipment ::: Caused by: Improper preparation of machinery or equipment for transport Resulting in: Community Complaints or Injury to person(s) or Public Liability.


C (Pb)

4 (L)

18 (M)





There is a risk to Myuna from ::: Damage to Aboriginal & Cultural Heritage Items ::: Caused by: Clearing or Installation of subsidence pegs or Surface drilling or Vehicle movements Resulting in: Community Complaints or Damage to relationship with Aboriginal stakeholders or Legal liability or Non-compliance with Development Consent conditions.


E (Pb)

4 (R)

23 (L)


8.2.c. Aboriginal studies completed as part of the REF process


There is a risk to Myuna from 3.1.a. Rehabilitation of areas as D 5 24


49 of 59

Step Potential Incident Current Controls L MRC RR Recommended Control ::: Erosion of soils ::: Caused by: Fire trails not being maintained or Heavy rainfall or Poor rehabilitation or Poor water management or Vehicle movements Resulting in: Degredation of land or Exceeding licence limits or Fire trails untrafficable or Non-compliance with Leases & Consents or Pollution of waterways.

required to minimise exposed areas

(IF) (E) (L)


unsealed areas 3.1.d. Mulching of unvegetated

areas 3.1.e. Sediment control fencing 3.1.f. Bushfire Management Plan -






E (D)

5 (E)

25 (L)

3.3.b. Land Management Plan 3.3.c. Bushfire Management Plan 3.3.d. Weed and Pest Management

Plan 3.3.e. Flora Surveys completed for

diversion drains


There is a risk to Myuna from ::: Weed & pest infestation (& impacts on native vegetation) ::: Caused by: Improper weed and pest management or Vehicle movements Resulting in: Degredation of land.

3.4.a. Selective pesticides used

D (Pb)

5 (E)

24 (L)

3.4.b. Limited traffic movements on

unsealed areas 3.4.c. Weed and Pest Management

Plan 3.4.d. Land Management Plan 3.4.e. Weed action plan developed

for the site


There is a risk to Myuna from ::: Discolouration of discharge from LDP001 ::: Caused by:

4.2.a. Mon - Fri Inspection / weekly inspection

C (D)

5 (E)

22 (L)



50 of 59

Step Potential Incident Current Controls L MRC RR Recommended Control Failure to dilute Fassifern discharge or High iron and manganese content in Fassifern seam Resulting in: Community Complaints or Pollution of waterways.




E (Pb)

5 (E)

25 (L)




There is a risk to Myuna from ::: Contamination of land ::: Caused by: Hydrocarbon spills / leaks or Rope greaser dripping or Spillage of coal fines or Surface transformers (including spare transformers) or Waste dumping area Resulting in: Community Complaints or Contaminated land or Exceedence of DECCW Guidelines.


C (Pb)

5 (F)

22 (L)

1.2.b. Hydrocarbon Management

Plan 1.2.c. Emergency spills kits 1.2.d. Induction & training 1.2.e. Waste Management Plan 1.2.f. Contractors waste sorting


There is a risk to Myuna from ::: Spontaneous Combustion (surface stockpiling). ::: Caused by: Stockpiling coal for long periods of time Resulting in:


D (Op)

5 (F)

24 (L)



51 of 59

Step Potential Incident Current Controls L MRC RR Recommended Control Community Complaints or Damage to infrastructure or Exceedence of Development Consent Conditions or Fire.


There is a risk to Myuna from ::: Green house gas emissions ::: Caused by: CO2 levels underground or Methane levels underground Resulting in: Change in operating costs due to the carbon tax or Increasing the sites contribution to the climate change.


E (IF)

5 (F)

25 (L)



There is a risk to Myuna from ::: Contamination of land ::: Caused by: Hydrocarbon spills / leaks or Vehicle movements Resulting in: Exceedence of DECCW Guidelines.

3.2.a. Hydrocarbon Management Plan

E (Pb)

5 (F)

25 (L)

3.2.b. Emergency spills kits 3.2.c. Designated areas for






C (Pb)

5 (L)

22 (L)

1.1.b. Enclosed surface conveyors

& CHP 1.1.c. Dust deposition monitoring

(External consultant) 1.1.d. Spot bobcat sweeper around

CHP 1.1.e. Weekly vacuum sweeping 1.1.f. Dust Management Plan 1.1.g. Water tanker utilised when


suppression water sprays along conveyors, crushers, Coal Handling Plant

1.1.i. Sealed surface and roads 1.1.j. Minimal coal handling


52 of 59

Step Potential Incident Current Controls L MRC RR Recommended Control 1.1.k. Buffer zone between site &

residents 1. Coal Handling on the


There is a risk to Myuna from ::: Contamination of water runoff into CHP Dam ::: Caused by: Hydrocarbon spills / leaks or Rope greaser dripping or Spillage of coal fines or Storage of hydrocarbons in CHP or Storage of surplus plant and equipment or Surface transformers (including spare transformers) Resulting in: Community Complaints or Exceeding licence limits or Pollution of waterways.

1.3.a. Drain coverings

C (IF)

5 (L)

22 (L)


collected by bobcat weekly 1.3.c. Under / over weir in CHP dam1.3.d. Drive in sump which traps


inspection 1.3.g. Transformers in operation are

bunded


There is a risk to Myuna from ::: High noise levels ::: Caused by: Alarms - Belt, Shift alarms, Metal detector etc or Coal Handling Plant Operations or Coal stockpiling & loading or Doors being open on CHP or Temperature Inversion or Truck movements or Vehicle movements Resulting in: Community Complaints or Exceedence of DECCW Guidelines or Exceedence of Development Consent Conditions.

1.4.a. Material handling predominantly during daylight hours

D (Pb)

5 (R)

24 (L)




plant


There is a risk to Myuna from ::: High air pollution levels ::: Caused by: Fire underground or Increased ventilation or Natural causes - roof fall, earthquake etc or Underground vehicle movements

2.1.a. Dust scrubbers on continuous miners

E (Pb)

5 (R)

25 (L)

2.1.b. Spray systems on underground conveyor belts

2.1.c. Distance between production panels and upcast shaft (allows dust to settle from ventilation current to upcast shaft)


53 of 59

Step Potential Incident Current Controls L MRC RR Recommended Control Resulting in: Community Complaints or Exceedence of DECCW Guidelines or Exceedence of Development Consent Conditions.





There is a risk to Myuna from ::: High noise levels ::: Caused by: Alarms - Belt, Shift alarms, Metal detector etc or Alarms on vehicles and machinery or Emergency services response (Ambulance, Helicopter etc) or Underground machinery & equipment brought to the surface or Vehicle movements or Vehicles coming to & from the site Resulting in: Community Complaints or Exceedence of DECCW Guidelines or Exceedence of Development Consent Conditions.


C (Pb)

5 (R)

22 (L)






E (Pb)

5 (R)

25 (L)



There is a risk to Myuna from ::: Unplanned Surface movement /

9.1.a. Shotfiring management plan D

(Pb) 5

(R) 24 (L)

9.1.b. Limited amount of shotfiring

occurs on colliery


54 of 59

Step Potential Incident Current Controls L MRC RR Recommended Control vibration ::: Caused by: Depth of cover or Poor design of shotfiring or proximity to residential area Resulting in: Community Complaints or Exceedence of DECCW Guidelines or Non-compliance with Development Consent conditions.


55 of 59

Recommended Controls Recommended Controls

Place(s) Used Allocated To

Required By Date Pulse User No. PULSE Ref. No. Do NOT enter additional Recommended Controls on this sheet.

(Only one SITE person for each Recommended Control)


Events: 4.3 Brett Henderson 15-Jun-2012 50016 19070.41876


Events: 4.1, 4.3 Veronica Warren 15-Jun-2012 70036 19070.41877


Events: 4.6 Peter Nelson 15-Nov-2012 70037 19070.41878


Events: 6.2 Veronica Warren 15-Jun-2012 70036 19070.41879




Events: 2.2 Mal Yule 15-Jul-2012 70039 19070.41881


Events: 4.3 Peter Nelson 24-May-2012 70037 19070.41882 8. Investigate alternate methods of capturing washdown fine

at source in coal plant.

Events: 4.3 Brett Henderson 15-Jul-2012 50016 19070.41883


Events: 4.5 Veronica Warren 30-Mar-2012 70036 19070.41884


Events: 4.6 Mal Yule 15-Jun-2012 70039 19070.41885




Events: 7.1, 7.2, 7.3 Ross Mackenzie 15-Jun-2012 77006 19070.41887


Events: 7.1, 7.2, 7.3 Ross Mackenzie 15-Jun-2012 77006 19070.41888


56 of 59

CEY Risk Matrix Page 1


57 of 59



58 of 59



59 of 59

Appendix 2

Myuna Colliery

Annual Return (EPL 366)

Appendix 3

DPI-MR Rehabilitation Cost Calculation

Documents

Annual Environmental Management Report · 2017. 12. 7. · MYU21623_Annual Environmental Management Report Myuna Colliery Page 2 of 36 Table of Contents 1. Introduction_____5 1.1