Resume - Environmental geoscientist (hydrochemistry/hydrogeology) role

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Resume #27485

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PROFILE

I am an Environmental Geoscientist with over 10 years experience in hydrogeology and hydrogeochemistry. Working in several projects related to groundwater contamination, pyrite weathering (acid rock drainage - ARD) evaluation, soil-water interactions, contaminant transport in both contaminated sites and mine waste rock and tailing stacks in Australia and internationally. Recently I was involved as hydrogeochemist/hydrogeologist with the BHPBilliton's Marillana Creek Realignment Project and participated in a technical visit to CVG-Bauxilum in Venezuela to assess tailing deposition methodology transfer. My particular areas of interest include the analysis of hydro-geochemical systems for long-term mine site rehabilitation, pit-lake hydro-geochemistry and groundwater-surface water interactions at minesites.

SPECIALISED SKILLS

Possess solid understanding on:
Ground- surface-water quality assessment: fate and transport of solutes, monitoring techniques and assessment of impacts from both point and non-point sources.
Geotechnical, hydrogeology and hydro-geochemical assessment of contaminated sites and related waste material.
Acid rock drainage (ARD) prediction, prevention and remediation techniques.
Geotechnical and geochemical assessment of waste rock/tailing stacks.
Implementation of programmes for disposal of solid mine waste material.
Geological Explorations. Geological and engineering geological mapping.

STRENGTHS

Analytical
Sound problem solving skills
Innovative in approach new techniques
Strong commitment for team work
Research and project management

EMPLOYMENT HISTORY

April 2009 – current
Principal Environmental Geoscientist
Contract work for United Minerals Corporation (Perth).
Current project:
Sitewide hydrogeochemical assessment of the Railway Deposit, Hamersley Basin of Western Australia. The project involves a predictive hydrogeochemical assessment of the pit-lake and groundwater. Results will assist in defining potential long-term environmental effects that may derive from a proposed expansion of the mining areas.
Completed project:
Geochemical waste rock characterisation (GWRC): Implications for waste rock management: The project involved the overall management of the geochemical characterisation of the mine-waste rock for the development of the Railway Deposit, Hamersley Basin of Western Australia.

Jan 2008 – March 2009
Senior Environmental Geoscientist
GHD Pty - Western Australia
GHD is an international professional services company providing leadership in management, engineering, the environment, planning and architecture.
Key duties
Hydrogeology and hydrogeochemical evaluation of contaminated sites and groundwater contamination.
Hydrogeology and hydro-geochemical assessment (e.g., solute transport and processes) of waste rock dump (WRD)/tailing storage facilities (TSF) at mine sites.
ARD investigations and related project management.
Acid sulphate soils (ASS) investigations and related management.
Key projects and achievements
Red Sand Investigation, Centre for Sustainable Resource Processing (CSRP)
In addition to the evaluation for the potential of acid sulphate soil (PASS) and the hydrogeological characteristics of the site, the role included to coordinate the assessment of the hydrogeochemical and geochemical properties of the sand.
Marillana Creek realignment, Yandi, Western Australia.
Managed the geochemical, hydrogeology and hydrogeochemical components of the project, and also completed the long–term predictive hydrogeochemical modelling of the three options assessed; do nothing, diversion scenario and pit-infilling scenarios.
D-Dam Environmental Assessment, Bluestone Mines Pty Ltd
As part of the preparation of a Notice of Intent and DPEMP for a proposed tailings dam, completed the preliminary predictive geochemical modelling using data adapted to a box model of a reservoir, 3 rivers and several seepage tailing discharge points.
Hydrogeochemical/hydrogeological evaluation of the proposed Western Extension, Kemerton Silica Sand Pty Ltd.
Developed and completed a predictive hydrogeochemical assessment of the pit-lake in relation to groundwater seasonal fluctuations to define potential long-term environmental effects that may result from a proposed expansion of the mining areas.
Soil and aquatic sediment monitoring, Woodcutters, Northern Territory
In addition to the management of the project, duties involved the geochemical and hydrogeochemical assessment of substrate-sediment and groundwaters to define sources of metal contamination encountered within previous operational areas, biopolishing pond and banks of the Woodcutter stream.
Provisional hydrogeochemical modelling of Goldsworthy Mine Pit-Lake and Billy-Goat Hill Waste Dump Remediation
Participate in the evaluation of the data resulting from a geochemical waste rock characterization of the Goldsworthy Mine. Also, developed and completed a predictive geochemical modeling to define the long-term pit-lake water chemistry as affected by the proposed disposal of potentially acid forming (PAF) waste rock materials.
WO5H Pit-Lake hydrogeological and hydrogeochemical investigations, Western Australia
Participated in the assessment of the groundwater behavior and quality of the site. Additionally, to define if there is the likelihood of contaminated seepage leaving the WO5H pit-lake, completed the provisional long-term pit-lake hydrogeochemical modeling.

May 2006 – December 2007
Senior Environmental Geoscientist
Earth-Water-Life Sciences Pty Ltd (EWL) (Energy Resources Australia Pty Ltd – Rio Tinto Group)
EWLS is a company of highly qualified and experienced environmental specialists based in Darwin but with staff in Victoria, Western Australia and Queensland.
Key duties
My role within the Earth and Water team predominantly addresses topics related to hydrogeochemistry, hydrogeology and soil science (both soil physics and chemistry).

Projects managed and achievements
Groundwater remediation beneath the Ranger Uranium Mine tailing storage facility (TSF).
Managed and planned bore drilling and groundwater monitoring programs to understand TSF seepage processes and their interaction with groundwaters beneath and around the TSF. This has been targeted as a key project to understand soil/substrate/seepage/groundwater interactions and therefore the scope of the studies were expanded and investigations in relation to closure and rehabilitation continues to date.
Review of Rangers statutory and operational boreholes as part of the long-term minesite rehabilitation programme
Overall project management in relation to closure and long-term mine site rehabilitation. Reviewed the validity of statutory and operational groundwater monitoring programs in relation to long-term site-wide groundwater management.
Phase 2 contamination in the Regolith groundwater (Ranger Mine Operational and Landfill Areas)
To develop long-term plans to rehabilitate the operational areas in relation to Ranger mine site closure, the project achieved a hydrological, geochemical and hydrogeochemical evaluation of deep regolith materials within the contaminated sites.
Assessment of water quality & the origin of surface pools – Ranger TSF
The project was undertaken to collate and interpret historical and recent water quality data from samples attained in observation bores (OBs) and seepage pools near the TSF. Hydrogeochemistry data evaluation and geochemical modelling were the key tools to interpret overall seepage pool water quality behaviour and its influences on the surrounding environment.
Aquatic sediment monitoring (Woodcutters)
The project, as part of EWLS bench-mark exercise, completed a geochemical characterisation and evaluation of fate and spatial distribution of metals in sediments within the mine biopolishing pond and creek sediments from Woodcutters and Coomalie Creeks.
Installation of observation boreholes and piezometers around Ranger's TSF
Managed and supervised the implementation of 18 boreholes to monitor groundwater behaviour and potential contamination due to TSF seepage influences and groundwater pattern modifications resulting from the raising of the TSF walls was the key objective of the project.

November 2005 – February 2006
Project Scientist/Geochemist
Water Management Consultants Pty Ltd (WMC).
WMC is an international group specialising in the development, management and environmental protection of water resources. WMC provides technical services in a wide range of disciplines, including hydrogeology, geochemistry, and other related disciplines.
Key duty
My role predominantly addressed hydrogeochemistry related issues.
Achievements
Investigated and analysed hydro-geochemical systems for long-term mine site rehabilitation and this included:
a) Pit-lake hydro-geochemistry modelling.
b) Ground-surface water: water balance and hydro-geochemistry data analysis.
Developed a short research on upscaling hydro-geochemical laboratory data to field medium conditions.

July 2004 – December 2005
Full time PhD Research: (ARD research, thesis compilation and completion).

Jan 2003 – June 2004
Researcher (Field/laboratory assessment)
Sons of Gwalia Ltd
Key duties
As part of the TSF assessment and studies to understand the processes of ARD formation and management, my role was to:
Characterize the tailing materials, physical, and geochemical; and
Characterize the hydrogeology properties of tailing materials and tailing waste cover.

2000 – 2002
Full time PHD Research

1998 - 1999
Researcher (Laboratory assessment)
Auckland University of Technology (AUT) - (Auckland, New Zealand)
The position involved the development of a short research on "geochemical experiments to simulate and remediate ARD". In order to remove a trace metal Zn2+ from an aqueous solution, the research investigated the adsorption/co-precipitation of Zn2+ onto/with iron hydroxide [Fe(OH)3].

1996 - 1997
Researcher (Field/laboratory assessment)
Solid Energy - Stockton Open Cast Coal Mine – (Westport, Buller District, New Zealand)
Key duties
The implementation and evaluation of innovative static and kinetic tests to predict ARD.
The collection and evaluation of solid and liquid samples.
The implementation of monitoring programmes and techniques for sample and data collection.
Geological and engineering geological mapping.
The assessment of the stability of overburden waste rock stacks as integral part of the rehabilitation programme was also completed.

QUALIFICATIONS

Qualifications in areas of specialization
2008 Project Management Diploma (PMD), Leader Group (Australasia) Pty Ltd
2000 Postgraduate Diploma in Applied Science (International Practice) – Auckland University of Technology
Academic qualifications
2005 PhD - School of Earth and Geographical Sciences, The University of Western Australia
Research topic: "Pyrite weathering and lithium (Li+) transport under unsaturated flow conditions in model and mine-tailing systems"
1998 Master in Science (Honours) - (Environmental Science) - University of Canterbury, Christchurch, New Zealand
1995 Bachelor of Science - (Geology) - The University of Auckland, Auckland, New Zealand
1989 Engineering Geology Certificates - National University "Daniel Alcides Carrión", Cerro de Pasco, Pasco, Perú

PROFESSIONAL AFFILIATIONS, ACTIVITIES AND ACHIEVEMENTS

Member and organizer of the Environmental Science Group of the World Network of Peruvian Scientists (WNPS - http://www.rmcp-peru.org/). Reviewed peer papers presented to the group of Environmental Science during the First (2003), Second (2004) and Third (2005) International Conferences organized by WNPS (Lima, Perú). Current member of the Scientific Committee of the Environmental Science Group (WNPS)
Member of the Geological Society of Perú

OUTCOME OF SELECTED PROJECTS

Alarcón León, E, Gautam B. (2008) Marillana Creek realignment: hydrogeology and hydrogeochemistry. Poster presented at the GHD Hydrogeology Service Line Conference. Nov 2008.
Alarcón León, E, Pierce, S, (2008) Red Sand Investigation, Centre for Sustainable Resource Processing (CSRP). Report prepared for ALCOA and held at the GHD. 50 pp
Alarcón León, E, Gautam B. (2008) Marillana Creek realignment: Additions to Phase I Scope of Works. Report held by BHP Billiton. 54 pp plus Appendices.
Alarcón León, E (2008) Hydrogeological and hydrogeochemical assessment of the WO5H pit lake system. Short report held at the GHD. 10 pp
Alarcón León, E., Puhalovich, A., (2007) Review of current groundwater monitoring (operational & statutory) at ERA Ranger Mine. Report held at the EWL Sciences. 32 pp
Alarcón León, E., Puhalovich, A., Klessa, D.A. (2007) Assessment of water quality & the origin of surface pools – Ranger TSF. Short Report held at the EWL Sciences. 11 pp + Appendixes
Alarcón León, E., Jones, C., Noller, B., Diacomanolis, V., Ng, J. (2007) Woodcutters Sediment Monitoring 2006. Draft report held at Newmont Australia. 42 pp plus Appendixes.
Alarcón León, E., and Puhalovich, A. (2007) Observed seepages in the region of the Ranger tailings storage facility: construction of the wall raise to RL+47.5 (2006). Short Report held at the Ranger Uranium Mine. 8 pp
Alarcón León, E., Gellert, C., and Puhalovich, A. (2007) Position Paper: Current status of contaminated sites at Ranger Mine and proposed way forward. 5pp
Alarcón León, E., Gellert, C., and Pillai, M. (2007) Groundwater Contamination in the Ranger Mine Plant Area –Phase 2 Investigations. Report held at the Ranger Uranium Mine. 64pp
Alarcón León, Edgardo (2007) Drilling program and installation of piezometers around the Ranger tailings storage facility (TSF). Short report held at the Ranger Uranium Mine. 17pp

COMPUTING SKILLS

PHREEQCI – 2
HYDRUS 1/2/3 D
Aquachem
Good understanding of groundwater modelling packages and Phast and MT3DMS5

LANGUAGES
English, Spanish

REFEREES
Excellent references are available upon request.

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