Boral — Corporate Update (March 2022)
33 slides from Boral's corporate update, Mar 11, 2022
Slide 1: Berrima Colliery – Closure Working Group Meeting #13
Click to edit Master title style Subheader Berrima Colliery – Closure Working Group Meeting #13 11 March 2022
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 EPL EIP & REF – Greg Johnson, EPA, Rob B
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, ● WaterNSW - Ravi Sundaram ● Wingecarribee Shire Council
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: L Boral to continue to liaise with Dr lan Wright in relation to river monitoring as part of the transition to the next stage in mine closure. This may include a joint meeting between Dr Wright, the EPA and Boral. 2. December 2021 newsletter to
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 trending down, dosing rate to be increased EC – trending below 1000uS/cm 13
Slide 14: Adit discharge update – Iron & Manganese
Adit discharge update – Iron & Manganese Iron – Continues to remain low Manganese – Spike in January. 14
Slide 15: Adit discharge update – Nickel and Zinc
Adit discharge update – Nickel and Zinc Nickel – Spike in February. Zinc – Spike in February. Commentary – Feb spike in metals, we are investigating possible cause. Action has been to increase lime dosing. Aeration is the key driver to manage Fe and Mn. Water quality will be easier to manage at the
Slide 16: River Quality Update
River Quality Update BCRAL ©
Slide 17: River quality update – pH & EC
River quality update – pH & EC Note: we no longer are required to monitor at the 100m, 1km, 2km or 3km points downstream. 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 – Levels remain low, discharge concentrations are below usual river levels. Stream levels are reflective of rain event. Estimating >2000ML per day. 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 above 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 increasing, closer to 1.9ML • The pH of waters was on the low end in Feb
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 will be assisting Boral the prepare the assessment We will be aiming to have this prepared shortly. 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. 26
Slide 27: Mandemar Lane Update
07 Mandemar Lane Update
Slide 28: Mandemar Lane update
Mandemar Lane update Still to resolve access to one property owner to enable final subsidence survey. 28
Slide 29: Communications Update
8 Communications Update
Slide 30: Communications update: community website and pit top engagement
• Local community website – uploaded December 2021 newsletter. • Community engagement pit top treatment project – In addition to the information provided in recent newsletters distributed in the local community Boral intends to write to all residents in Medway village to provide them with details of
Slide 31: General Business
9 General Business
Slide 32: Next Meeting Proposed Friday 10 June 2022
10 Next Meeting Proposed Friday 10 June 2022
Slide 33: Thanks for your participation
Thanks for your participation 33