Boral — Corporate Update (February 2019)
29 slides from Boral's corporate update, Feb 11, 2019
Slide 1: Berrima Colliery - Closure Working Group Meeting #3
Berrima Colliery - Closure Working Group Meeting #3 >Welcome Berrima Colliery, Medway, 11 February 2019
Slide 2: Agenda
Agenda 1. Welcome and Apologies 2. Pit top inspection 3. Review of minutes & actions 4. Estimates of Iron removed since commencement of trials 5. Water Quality Trends and Macroinvertebrate Update 6. Bulkhead Seals Update 7. EPL/MOP Updates 8. Loch Catherine Update Titlefefefefeffff4g45g4545 9. Commu
Slide 3: Welcome - CWG Representatives, Apologies & Guests
Welcome - CWG Representatives, Apologies & Guests ● Boral - Fabio Colusso, Greg Johnson, David Spears, Chris Maher ● Resource Regulator - Greg Kininmonth, ● Environment Protection Authority - William Dove, Andrew Couldridge ● WaterNSW - Ravi Sundaram ● Wingecarribee Shire Council - Barry Arthur Titl
Slide 4: Pit Top Inspection
Pit Top Inspection Safety requirements - David/Chris Titlefefefefeffff4g45g4545
Slide 5: Pit Top Inspection
Pit Top Inspection Titlefefefefeffff4g45g4545
Slide 6: Review of Minutes – suggested amendments & review of actions
Review of Minutes – suggested amendments & review of actions Titlefefefefeffff4g45g4545
Slide 7: Terms of Reference
Terms of Reference Titlefefefefeffff4g45g4545
Slide 8: Estimated Metals retained within mine Feb 2018 - Nov 2018
Estimated Metals retained within mine 15 Feb 2018 - 26 Nov 2018 Iron - 8956 kg Manganese - 1834 kg Nickel - 32.5 kg Zinc - 72 kg Titlefefefefeffff4g45g4545
Slide 9: Surface Water Performance Monitoring Update - Report dated 1 October 2018
Surface Water Performance Monitoring Update - Report dated 31 October 2018 Titlefefefefeffff4g45g4545
Slide 10: Surface Water Performance Monitoring Update - report dated 1 Oct 2018
Surface Water Performance Monitoring Update - report dated 31 Oct 2018 Wingecarribee River Flow - Very low flow (before recent rain and releases), mixing becomes non-existent in very low flows, mine discharge accounted an average of 30% of stream flow during 2018 Titlefefefefeffff4g45g4545 2018 Annu
Slide 11: Surface Water Monitoring Update
Surface Water Monitoring Update ● pH - of mine water averaging 0.5 below long term average. Not appearing to impact water downstream. ● Conductivity - higher conductivity causes an increase within and beyond mixing zone, increase of 200us/cm, it is generally below 500us/cm which is considered fresh
Slide 12: Surface Water Monitoring Update
Surface Water Monitoring Update ● Iron - Drops rapidly, generally follows upstream sites. ● Mg - Decreases rapidly through mixing zone. Similar to historical situation, all below ANZECC 95% default of 1.9mg/l Titlefefefefeffff4g45g4545
Slide 13: Surface Water Monitoring Update
Surface Water Monitoring Update ● Nickel & Zinc - Decreases rapidly within the mixing zone meeting ANZECC 95% ecosystem protection values of 0.011 Nickel and 0.008 Zinc at Biloela Titlefefefefeffff4g45g4545
Slide 14: Discharge Quality Update - Volumes
Discharge Quality Update - Volumes ● Additional pumping ceased in October to allow bulkhead works to commence ● Recharging rate appears to be slowing with pumping now intermittent Titlefefefefeffff4g45g4545
Slide 15: Treatment Trial Water Quality Trends - pH & EC
Treatment Trial Water Quality Trends - pH & EC ● pH is relatively constant and within licence range of 6.5 - 8.5 ● Conductivity trending down towards 2015 levels Titlefefefefeffff4g45g4545
Slide 16: Treatment Trial Water Quality Trends - Iron and Manganese
Treatment Trial Water Quality Trends - Iron and Manganese ● Iron and Manganese - returning to 2015 levels ● Close to 9t or Iron and 2t of Manganese prevented from entering river ● Precipitates remain within the limestone trench and goaf ● See samples of limestone from Titlefefefefeffff4g45g4545 trea
Slide 17: Treatment Trial Water Quality Trends - Nickel and Zinc
Treatment Trial Water Quality Trends - Nickel and Zinc ● Nickel and Zinc has returned to 2015 levels Titlefefefefeffff4g45g4545
Slide 18: Water Quality Trends along the treatment path - Iron and Sulphate examples
Water Quality Trends along the treatment path - Iron and Sulphate examples ● 400 D12 Sump - Pump pick up location ● Titlefefefefeffff4g45g4545 400 C8 - After aeration, treatment through lime bed and filtered through goaf ● Adit Discharge - V - Notch sample Iron - Level remains elevated from sump. Tr
Slide 19: Macroinvertebrate study update - January 2019 Report
Macroinvertebrate study update - January 2019 Report ● In general, impacts from discharge were observed downstream at Site 3 (300m downstream) and Site 4 (1000m downstream) in all three survey periods (March, June and September 2018) with no obvious impacts at sites further downstream. ● Impacts inc
Slide 20: Interim Sealing Plan Update - Location in respect of workings
Interim Sealing Plan Update - Location in respect of workings Titlefefefefeffff4g45g4545
Slide 21: Bulkhead Seal installation update
Bulkhead Seal installation update Titlefefefefeffff4g45g4545
Slide 22: Environmental Protection Licence/ Mine Operations Plan Updates
Environmental Protection Licence/ Mine Operations Plan Updates EPL 608 - Varied in November to amend report submission dates MOP - Update to MOP to be submitted in April 2019 to reflect Loch Catherine sealing options. The Loch Catherine Mine was closed in 1959 and although most of the original infra
Slide 23: Loch Catherine Update
Loch Catherine Update Titlefefefefeffff4g45g4545
Slide 24: Loch Catherine Update
Loch Catherine Update Access to the adits via the former drift was reinstated as per the approved Stage 1 MOP in December. Titlefefefefeffff4g45g4545
Slide 25: Communication Plan - Update
Communication Plan - Update Titlefefefefeffff4g45g4545
Slide 26: Boral's commitment to a best practice approach
Master Animation is proposed as a next stage in community engagement, one 2-3-minute master video animation [shareable Master Animation is proposed as a next stage in community engagement, one 2- format] will be produced to visualise and explain the current 3-minute master video animation [shareable
Slide 27: General business
General business Titlefefefefeffff4g45g4545
Slide 28: Next meeting date
Next meeting date Due to bulkhead seals, recharging of mine and minimal discharge Proposing 6 months time - August 2019, will provide an update to members of CWG on site activities in May 2019. Location – TBA Titlefefefefeffff4g45g4545
Slide 29: Slide 29