Environmental Geochemistry International has one of the world’s most experienced consulting and laboratory teams focused on Acid Rock Drainage and resource-related hydrogeology. EGi’s geochemists produced the AMIRA ARD Test Handbook and developed most of the globally accepted standard characterisation techniques used today by miners and environmental mining professionals everywhere.
DR WARWICK STEWART
BSc Hons, Grad Dip Env. Mgt., PhD
Warwick has held a key role in EGi since 2000. He has 28 years’ experience in geochemistry, geology, and environmental management. He has designed and led numerous ARD assessment programmes and prediction studies for various mine sites in Australia, Asia and the Americas, overseeing geochemical testing, mine materials assessment and mine geochemical management audit.
Leading EGi’s R&D and innovation programme, Warwick developed the techniques and methods that are used across the world for ARD assessment and authored the ARD Test Handbook published by AMIRA and referred to by all leading geochemists.
DR JOHN JEFFERY
John joined EGi in 1989 and holds the position of Principal Geochemist. He has a detailed understanding of the challenges associated with mine waste geochemical characterisation and management, and of the potential impacts on the receiving environments associated with ARD.
John has specific expertise in the environmental geochemical and hydrogeochemical aspects of waste disposal in the mining and mineral processing industry, including prediction and control of acid rock drainage, characterisation and management of sulphide-bearing wastes, mine site rehabilitation, geochemical modelling of pit and site-wide water quality, and contaminant transport in ground and surface waters.
DR ANDREW BOTFIELD
BSc Hons, PhD
Andrew has over 20 years’ experience as an environmental geochemist and contaminated site technical specialist. His core technical strengths are in relation to characterization of mine and industrial waste materials, predictive hydro-geochemical modelling and all stages of contaminated site investigation and remediation.
His project experience spans Australia, Canada, South America and Africa across a wide range of sectors including: mining; transport infrastructure; land developers; waste facility operators; oil and gas; heavy industry; and all levels of government.
DR STUART MILLER
BAgrSc, MSc, M. Phil, PhD
Stuart was the founding Director of EGi. He has over 40 years’ experience with more than 350 mining projects within Australia and worldwide and specialises in site auditing and development of ARD management strategies.
He is recognised as a world and leading expert in ARD prediction and management, and has pioneered development in ARD prediction technologies, including the Net Acid Generation (NAG) test.
DR KATARINA DAVID
BSc Hons, MSc, PhD
Katarina has 22 years’ experience in hydrogeology and groundwater management. She has completed numerous groundwater assessment studies on infrastructure, mining, contaminated land and agricultural projects. Her work includes practical aspects through to conceptual model development and evaluation of environmental impacts using analytical and numerical modelling and environmental assessment techniques. Her interests are in multidisciplinary studies involving hydrogeology, geochemistry and geomechanics. Katarina leads EGi’s hydrogeology activities.
DR RUSSELL SCHUMANN
BSc (Hons), PhD
Russell has the role of EGi Principal Environmental Chemist. He has over 25 years’ experience in the area of water analysis and water treatment; principally focused on environmental and operational water issues in the mining industry. He has extensive experience in the treatment of tailings water and other wastewater streams for repurposing at a range of operations. Russell’s work in the area of acid rock drainage includes being a key member of a research team that attracted over $6.7 million in research funding, including five ARC Linkage grants and significant industry funding. He has contributed to over 30 publications in the area of ARD research focusing on ARD prediction and management through source control. Russell’s work on ARD issues and water treatment include projects throughout Australia, South East Asia and North America.
DR DAVID FAULKNER
David is an environmental geochemist with extensive experience with mine-waste geochemical studies. He has been responsible for the development of sample selection and laboratory protocol for static and kinetic geochemical test work, data assessment and interpretation, trigger-level determination, aqueous geochemistry, hydrogeochemical modelling, statistical assessment and reporting. David’s recent work has focused on geochemical modelling using a variety of programs including: PHREEQC, Geochemists Workbench, and GoldSim. He has developed water quality prediction models to support decision making at various stages of mine life. He is also proficient with software packages for processing, interpreting and presenting large (hydro)geochemical datasets including: PHREEQC, WISH, ESdat, Grapher, and Python programming language.
DR BHASKER RATHI
BTech (Hons), PhD
Bhasker is a Senior Hydrogeochemical Modeller in EGi’s Perth office. He has more than 12 years’ of Australian and international experience in environmental consulting with a particular interest in modelling the fate of metals and metalloids in the natural systems. His modelling provides both invaluable insight into the nature and extent of groundwater seepages from mine waste storage areas and tools for the evaluation of feasible mitigation options. Bhasker’s toolkit includes numerical modelling programs such as MODFLOW, MT3D, PHT3D, PHREEQC, and GoldSim. Outside of EGi, Bhasker has presented his work at several international conferences, completed a postdoctoral research with University of Tuebingen, Germany, and worked as a contaminated site consultant for OTEK Australia and on site with FMG.
BSc Hons, MAppSc (Environmental Management)
David is an environmental management professional. He has over 25 years’ geology, environmental management and project management experience in the mineral resources and construction sectors holding various corporate, site and consultant roles, including responsibility for site safety management. His experience encompasses projects and mine sites across Australia, the South Pacific and South America and includes roles through the entire resource project development path from exploration through to mine closure, rehabilitation, and implementation of extensive long-term environmental monitoring programmes.
AI BINH TRAN
GAICD BEnvSc Hons, MPhil (Civil Engineering)
Ai Binh (Binny) joined EGi in 1999 and since that time has been in control of the company’s laboratory testing, analytical data management, quality control, and quarantine activities. She specialises in design, implementation and management of static and kinetic test-work programmes for domestic and international projects. Importantly, Binny manages the importation of samples from outside Australia; liaising with site-based and Australian Quarantine and Inspection Service personnel to maintain EGi’ s laboratory status as a class 5.11 quarantine approved premise.
Udaya is a qualified chemist and has been part of EGi since 1995. He has over 25 years’ experience in laboratory testing, laboratory operations, and laboratory management. Udaya was an instrumental part of the development of the laboratory protocols utilised by EGi for ascertaining acid potential from minesite samples.
BSc Hons, MBA, MAUSIMM, GAICD