Boral — Corporate Update (June 2022)
36 slides from Boral's corporate update, Jun 10, 2022
Slide 1: Berrima Colliery – Closure Working Group Meeting #14
Click to edit Master title style Subheader Berrima Colliery – Closure Working Group Meeting #14 10 June 2022 DRAFT – Not for distribution
Slide 2: Agenda
Agenda 1. Welcome and Apologies - Introductions 2. Terms of Reference - Conduct of CWG Members 3. Review of minutes & actions 4. Water Quality Results update - Greg Johnson 5. Water treatment update- Greg Johnson/David Spears 6. Pit top treatment and pipeline REF update– Greg Johnson, Rob Byrnes 7.
Slide 3: Welcome and Apologies
01 Welcome and Apologies
Slide 4: CWG Representatives, Apologies & Guests
CWG Representatives, Apologies & Guests ● Boral - Girish Yadwad (apology), Greg Johnson, David Spears, Kate Woodbridge ● Resource Regulator - Greg Kininmonth, Peter McMillan ● Environment Protection Authority – Greg Newman, Andrew Couldridge (apology), ● WaterNSW - Ravi Sundaram ● Wingecarribee Shir
Slide 5: Terms of Reference – Code of Conduct
02 Terms of Reference – Code of Conduct
Slide 6: Terms of Reference – Code of Conduct
Terms of Reference – Code of Conduct 6
Slide 7: Review of minutes and actions
03 Review of minutes and actions
Slide 8: Review of Minutes – suggested amendments
Review of Minutes – suggested amendments 8
Slide 9: Review of minutes - actions
Review of minutes - actions Summary of Meeting Actions: Boral to provide a presentation and update on groundwater and hydrogeochemical data. Boral to provide a copy of the consultation letter to Medway to the CWG. Boral to place the REF on the website. Kate Woodbridge to meet with Julian Brophy to d
Slide 10: Water Quality Results Update
04 Water Quality Results Update
Slide 11: Surface Water Monitoring Update
Surface Water Monitoring Update 11
Slide 12: Water Quality Guidelines
Water Quality Guidelines In order to interpret and give context to the water quality monitoring results from the Colliery we are now including details, where applicable, against the Australian Water Quality Guidelines for Freshwater Protection, Australian Water Quality Guidelines – Primary Industry
Slide 13: Adit discharge update – Volume, pH & EC
Adit discharge update – Volume, pH & EC Volume discharged – 1.9 ML per day (av.) pH – recent results more towards a neutral level by dosing EC – slight uptick above 1000uS/cm 13
Slide 14: Adit discharge update – Iron & Manganese
Adit discharge update – Iron & Manganese Iron – Short term uptick in iron, fortunately back below detected levels Manganese – recent results have been elevated, but trending down again. 14
Slide 15: Adit discharge update – Nickel and Zinc
Adit discharge update – Nickel and Zinc Nickel – Recent spikes are settling down. Zinc – Recent spikes are settling down. Commentary – Recent spikes in metals are settling down. Action has been to increase lime dosing. Aeration is the key driver to manage Fe and Mn. Water quality will be easier to m
Slide 16: River Quality Update
River Quality Update BCRAL ©
Slide 17: River quality update – pH & EC
River quality update – pH & EC Similar results to last quarter. High stream flows continue. pH – No influence in river at Biloela (6km) EC – No influence in river at Biloela (6km) 17
Slide 18: River quality update – iron & manganese
River quality update – iron & manganese Iron – March sample shows the temporary spike, but back in May. No impact on river due to stream flows Manganese – Elevated levels in the stream are likely the result of high stream flow from rain events. 18
Slide 19: River quality update – Nickel and Zinc
River quality update – Nickel and Zinc Nickel – River is below 95% protection down stream. Zinc – Levels below 95% protection down stream. 19
Slide 20: River quality update – Sulphate and commentary
River quality update – Sulphate and commentary Copper – Below stock drinking levels. Other sources influencing. Sulphate –Well below any trigger points. 20
Slide 21: Water Treatment Update
OS Water Treatment Update eee
Slide 22: Water treatment update
Water treatment update • The mine water quality behind the bulkheads remains poor, the underground water treatment system remains in operation to manage the mine water discharge quality. • Volumes of waters discharging has been consistent at 1.9ML • The pH of water was within the licence conditions.
Slide 23: Bulkhead water level update
Bulkhead water level update The underground water level behind the bulkheads has been retained at a reasonably constant height as is indicated in the above graph. With mine water levels behind the bulkheads managed though the underground mine water treatment pumping system. The monitoring the surrou
Slide 24: Pit Top Treatment & Pipeline EPL EIP & Review of Environmental Factors
06 Pit Top Treatment & Pipeline EPL EIP & Review of Environmental Factors
Slide 25: Review of Environmental Factors – Status
Review of Environmental Factors – Status As part of the EIP within the EPL we are required to complete an environmental assessment via a Review of Environmental Factors (REF) Rob Byrnes is assisting Boral the prepare the assessment and we are still awaiting the draft 25
Slide 26: Tip Top Treatment and Pipeline – EPL EIP
Tip Top Treatment and Pipeline – EPL EIP • The NSW EPA finalised the licence variation in December 2021. 26
Slide 27: Groundwater and Hydrogeochemical Review
07 Groundwater and Hydrogeochemical Review
Slide 28: Groundwater and Hydrogeochemical Review
Groundwater and Hydrogeochemical Review • A late 2017 Hydrogechemical assessment confirmed that irrespective of the closure option (partial or fully sealed) the majority of the groundwater would discharge from the lowest point of the mine being the drain adit. This has been confirmed by recent hydro
Slide 29: “— Berrima
“— Berrima ie
Slide 30: Mandemar Lane Update
08 Mandemar Lane Update
Slide 31: Mandemar Lane update
Mandemar Lane update All access agreements have now expired. Monitoring has ceased and we will be preparing a final monitoring report for Mandemar Lane and will remove piezometers shortly. 31
Slide 32: Communications Update
8 Communications Update
Slide 33: Community engagement pit top treatment project
• Community engagement pit top treatment project – A letter was delivered to all residents in Medway village, New Berrima and Mandemar Lane to provide them with details of the proposed pit top treatment and pipeline construction project, provide a map of the pipeline placement, details of the enviro
Slide 34: General Business
9 General Business
Slide 35: Next Meeting Proposed Friday 16 September 2022
10 Next Meeting Proposed Friday 16 September 2022
Slide 36: Thanks for your participation
Thanks for your participation 36