NZ Sustainability Symposium | ALGA
Building leaders in the sustainable management of contaminated land and groundwater

From extreme weather events to a sustainable future – How should contaminated land be managed in a changing climate?

Location: JetPark Hotel Auckland Airport & Conference Centre 63 Westney Road, Māngere, Auckland 2022, New Zealand

CPD Points: 6

Date: 19 October 2023

Time: 10.00 AM - 5.00 PM

Registration Fee

ALGA Member: $300.00(NZD)
Non-Member: $450.00(NZD)
Student: $50.00(NZD)

Symposium Details

Change is a constant across many aspects of our world today, and the contaminated land management practice is no exception. Be events swift and unpredictable, or the slow-moving culmination of a century of industrialisation, impacts to ground conditions are inevitable.

The Sustainability Symposium will present several different perspectives on how we can manage contaminated land through risk analysis, and the challenges associated with responding in a fashion that doesn’t contribute to the risk profile. ‘Sustainability’ can be perceived as a frequently-used buzz word, but this symposium aims to put a tangible face to aligning our finite resources with long-term priorities.

Presentations will inform the delegate’s day-to-day assessment and management work, as well as share first-hand emergency preparedness and response lessons learnt from the recent catastrophic events faced by Auckland and its surrounding communities.


  • 09:30am to 10:00am
  • 10:00am to 10:15am
  • 10:15am to 12:00pm
    Session 1
    Risk Based Approach to Waste Recovery, Disaster Recovery and Sustainable Remediation
    Dr Jackie Wright, Director, Environmental Risk Sciences Pty Ltd (Australia)
    Dr Dave Bull and Sarah Newall, Site Contamination Specialists, HAIL Environmental (New Zealand)
    Lynn Spence, Senior Specialist Environmental Engineer, Tonkin + Taylor (New Zealand)
  • 12:00pm to 01:00pm
  • 01:00pm to 02:45pm
    Session 2
    Emergency Preparedness and Disaster Recovery
    Olle Wennstrom, Technical Director Crisis & Emergency Management, GHD (Australia)
    Marta Roberts, Acting Manager, Technical Specialists (Construction, Asbestos and Diving), Worksafe NZ (New Zealand)
  • 02:45pm to 03:15pm
    Afternoon Tea
  • 03:15pm to 05:00pm
    Session 3
    Sustainable Remediation
    Paul Nathanail, Director, Land Quality Management Ltd (UK)
    Andrew Rose, Decontamination and Remediation Manager, Urban Development and Delivery
  • 05:00pm to 07:00pm
    Networking Drinks

Session Details

Session 1 Overview:

  • Overturned in fire and water: what could happen to contaminated sites during a disaster?
  • The first few days: what risks are posed to whom?
  • Don’t try this at home: how (not) to create contaminated sites during disaster recovery.
  • Let’s not just create waste but find ways to provide sustainable solutions to managing disaster recovery and remediation.
  • Risk based approaches to waste and resource recovery/reuse, including biosolids.

Session 2 Overview:

  • Emergency, crisis and disaster. What are they and how does the relationship look?
  • What is emergency preparedness and how is it created?
  • When a disaster strikes!
  • Concept for recovery!

NZ National State of Emergency – Auckland Anniversary Floods and Cyclone Gabrielle

  • Insights into response stage
  • Identifying land and water contamination risks in the response stage
  • Inter-agency cooperation
  • WorkSafe guidance for emerging risks.

Session 3 Overview:

  • Remediation options appraisal: The therapy selection
  • Sustainable remediation: The prescribed treatment
  • Cheaper, greener, popular – it's not pick ‘n’ mix


  • Brendon Love (Chair), HAIL Environmental
  • Judah Lebow, 4Sight Consulting
  • Rachel Rait, Mine Waste Management
  • Jade McConchie, GHD
  • Stanley Howell, Jacobs
  • Mike Mechaelis, Tonkin & Taylor
  • Marcus Herrmann, Riley



Paul Nathanail,
Director, Land Quality Management Ltd (UK)



Paul is director of Land Quality Management Ltd (LQM) and offers specialist consultancy services across the world. He chairs his local community Neighbourhood Forum. He chaired the working group tha wrote AS ISO 18504: 2022 Sustainable Remedition. He is a long standing member of ALGA and a CRC Care Fellow.


Olle Wennstrom,


Olle has a broad international experience in the areas of Crisis and Emergency Management, from front-end operational level, through Senior Management and Executives levels in multinational companies and organizations, to Government/Cabinet Minister levels.

With more than 40 years’ experience as a Senior Fire Officer, in Fire & Rescue Operations with a specialty in Command & Control within large-scale operations, in Fire Department, Major Emergency Management for onshore and offshore operations, industry and forestry, he has a holistic risk-based approach to Crisis and Emergency Management.

He has conducted numerous large-scale fire and rescue operations offshore and on land.

He has designed and implemented crisis and emergency management systems for global companies and worked for NATO’s civilian branch, the EADRCC as Head of Evaluation.


Marta Roberts,
WorkSafe New Zealand



Marta Roberts is the Acting Manager for Technical Specialists in Construction Diving and Asbestos at Worksafe NZ. Marta started her asbestos career in the UK conducting asbestos surveys, air testing, and analysis. From there she progressed into project management, contract management, compliance auditing, and business management roles before moving to New Zealand in 2019. Marta began working at Worksafe as a Technical Specialist in asbestos providing technical subject matter expertise in asbestos risk management before progressing to her current role. During recent National State of Emergency in New Zealand Marta was deployed to the National Crisis Management Centre to assist with response to the Auckland Anniversary floods and Cyclone Gabrielle and to support National Emergency Management Agency safety function.


Dr Jackie Wright,
Environmental Risk Sciences Pty Ltd


Dr Jackie Wright is the director of Environmental Risk Sciences and has over 30 years of experience in human health and environmental toxicology and risk assessment. She was the key author of the NEPM Schedules B4 and B7 and other Australian guidance. Jackie is a Fellow of ACTRA.


Dr Dave Bull,
HAIL Environmental (New Zealand)


Dr Dave Bull is a director of HAIL Environmental and holds Certified Environmental Practitioner – Site Contamination specialist certification. He has over 22 years of professional experience, including 17 years in contaminated land consulting in New Zealand and England, and is well known as a technical reviewer and speaker on contaminated land matters. He is currently serving on the Board of the Waste Management Institute New Zealand. Dave is New Zealand’s leading authority on arsenic contamination, and has unhealthy interests in the distribution, speciation, bioavailability and sustainable management of heavy metals generally. His main practice areas are quantitative risk assessment and contaminated land management.


Sarah Newall,
Site Contamination Specialist,
HAIL Environmental (New Zealand)


Sarah Newall has been with HAIL Environmental since 2021. She has over 19 years of professional experience, including 15 years in contaminated land consulting across several regions of New Zealand. She is based in her home region of Hawke’s Bay and since February has been working closely with local authorities and private clients dealing with the effects of Cyclone Gabrielle. Key focus areas have been sediment characterisation, receptor site selection, navigating regulatory requirements and orders in council, and assessing options for sediment re-use. When not occupied with sediment, Sarah keeps herself busy providing contaminated land advice across a broad range of clients and projects in Hawke’s Bay and beyond.


Lynn Spence,
Senior Specialist Environmental Engineer
Tonkin + Taylor


Thirty eight years experience in environmental engineering specializing in contaminant transport modelling and risk assessment.  Lead technical expert for the development of several state and city risk-based corrective action (RBCA) regulatory programs. Participated in the development of several U.S. State and Federal guidance documents and regulations.  Provided peer review and technical guidance for many risk assessments and fate and transport models. Petroleum hydrocarbon specialist.  Developed the RISC5 software for assessing human and environmental risk from contaminated sites.



Andrew Rose,
Decontamination and Remediation Manager, Urban Development and Delivery





Thank you to our Gold Sponsor


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