Orica Limited · ASX:ORI
Orica — Technical Presentation (February 2014)
12 slides from Orica's technical presentation, Feb 20, 2014
Slide 1: Expert Presentation to Community Liason Committee
www.geosyntec.com Expert Presentation to Community Liason Committee Dr. Michael Kavanaugh – Geosyntec Consultants Dr. Paul Johnson – Arizona State University Orica Botany Groundwater Cleanup Project 20 February 2014 Sydney, Australia 1 www.geosyntec.com
Slide 2: Influences from Recent Years
Influences from Recent Years ESTCP/SERDP Project Results Expert Committee Reports Empirical Performance Assessments Source Mechanistic Studies Characterization 2 www.geosyntec.com
Slide 3: Remediation Strategy
Remediation Strategy • Orica remediation strategy: (from 2014 Draft Report to Regulators) • Containment of dissolved phase CHC plumes on and off site to ensure risks to human health and the environment remain below target levels. • Continual optimization of operation of hydraulic containment and the
Slide 4: CSM Updates: Decreased Risk to Receptors
CSM Updates: Decreased Risk to Receptors DNAPL as CHC concentrations in CHCs concentrations n pore source of Springvale Drain water in Penrhyn Estuary below CHCs decreased several OoM Trigger Values Dissolved Decreases in CHC plumes concentrations in shallow groundwater as a result of Fill groundwat
Slide 5: Groundwater Capture - Shallow
Groundwater Capture - Shallow Hydraulic control is maintained From Figure 3.1 of 2013 Monitoring Report 5 www.geosyntec.com
Slide 6: Groundwater Capture - Deep
Groundwater Capture - Deep Hydraulic control is maintained Figure 3.2 of 2013 Monitoring Report 6 www.geosyntec.com
Slide 7: Groundwater Extraction Performance
Groundwater Extraction Performance • Approximately 14,000 ML groundwater has been removed (versus a plume pore volume of approximately 7,500 ML). Removal of close to two plume pore volumes Removal of 80-90% of dissolved mass – matches simple Pore Flushing Model • Total extraction rate is on target w
Slide 8: Mass Removal/Concentration
Mass Removal/Concentration • Total average extracted CHC concentration reaching asymptote Source: 2014 Botany Groundwater Review 8 www.geosyntec.com
Slide 9: Remedial System Performance Summary
Remedial System Performance Summary • System is meeting remedial objectives • Groundwater plumes are contained (shallow and deep) • Significant mass removal by extraction treatment • Potentially significant removal by transformation processes (hydrolysis, reductive dehalogenation, abotic reductions)
Slide 10: Large-Scale, High Concentration Plume – B.F. Goodrich Superfund Site
Large-Scale, High Concentration Plume – B.F. Goodrich Superfund Site • B.F. Goodrich Superfund Site, Calvert City, Kentucky has some similarities to BIP • Active chemical manufacturing facility • Large size, multiple sources, presence of multicomponent DNAPL with significant EDC fraction • High conc
Slide 11: B.F. Goodrich Superfund Site
B.F. Goodrich Superfund Site Source: Google Earth. 11 www.geosyntec.com
Slide 12: Closing Thoughts
Closing Thoughts • Current containment strategy is technically appropriate. • Current containment strategy is technically manageable – system rehabilitation/optimization required to meet RAOs in Voluntary Management Plan. • Complete isolation or removal of DNAPL sources not technically practical – p