Toxicology consulting is the practice of evaluating the potential for chemical exposures to affect human and environmental health and welfare. 

SLR professionals identify, acquire, and utilise the most up-to-date scientific information to assess intrinsic hazards of chemicals, exposures to these chemicals, and their corresponding risk to the public workers, and the environment.

How can we help?

SLR's core services for risk assessment and (eco) toxicology include: 

  • Detailed knowledge of current regulations, guidance, and underlying science. 
  • Clear understanding of our client’s goals and tailoring a scope to meet them. 
  • Conducting agency interaction and negotiation. 
  • Providing robust, pragmatic, and technically defensible human health and ecological risk assessment affording cost effective solutions. 
  • Development and/or assessment of health-based guidelines for chemicals 
  • Litigation support in toxicological matters. 
  • Hazardous substance and dangerous goods classification for mining concentrates, coal, and other related products.

Our team

  • Jamie Mills Technical Director
    Jamie Mills

    Jamie has over 25 years’ experience in the fields of Environmental Assessment, Contamination Remediation and Waste. He has conducted and directed environmental assessments and due diligence reviews for numerous and varied clients and industries throughout Europe. He has completed soil and groundwater investigations and developed remediation plans for soil and groundwater clean-up at numerous sites under a variety of statutes, negotiating with stakeholders and regulatory authorities. Jamie has provided expert witness in matters involving the source, distribution and fate of soil and groundwater contamination, as well as determining the adequacy of remediation. 


  • Stacey Arthurs Senior Consultant
    Stacey Arthurs

    Stacey has experience in due diligence works for acquisition, divestiture and compliance projects. She has managed portfolios of sites and has been involved with projects across Europe. Stacey has undertaken a variety of Phase 2 ground investigations for sites and contaminants across the UK, to assess environmental liabilities and to assess potential risk to human health and controlled waters. She has supervised several significant decommissioning and remediation projects and assists with Detailed Quantitative Risk Assessments.

  • Roy Bailey Principal Consultant
    Roy Bailey

    Roy has experience in due diligence, Phase I and II contaminated land investigation, remediation and waste management. He has experience in due diligence auditing, including divestiture, acquisition and compliance due diligence and has undertaken a wide range of Phase 1, 2 and remediation environmental projects for industry and property sectors. He has extensive knowledge of human health and groundwater risk assessment and technical comprehension of remedial techniques, remediation design and validation and has worked on projects across the UK.

  • Jon Parry Technical Director
    Jon Parry

    Jon’s particular areas of expertise include waste classification, environmental risk assessment, human health and controlled waters quantitative risk assessment, VOC assessment and vapour intrusion. As a hydrogeologist and risk assessor within environmental consultancies specialising in the investigation, assessment and remediation of Brownfield sites, he has extensive experience of contaminant fate and transport modelling including EA RTM, RBCA, RISC, SNIFFER, CLEA, & Consim. Jon is also experienced in developing remedial strategies and regulator negotiation.


excess oil

The dirt on the new Ontario Excess Soil Regulations

Kathryn Matheson Risk Assessor
Kathryn Matheson

Kathryn is a Qualified Person in Risk Assessment in Ontario with over 11 years of consulting experience in risk assessments, soil vapour assessments, Phase I and Phase II environmental site assessments and remediation activities. Kathryn has been involved in the preparation and peer review of numerous Human Health and Ecological Risk Assessments, Environmental Site Assessment and Remediation projects under guidance from the Canadian Council of Ministers of the Environment (CCME), Health Canada and the Canadian Standards Association (CSA) as well as various provincial and territorial bodies (ON, BC, AB, SK, MB, YK).

Toxic Release Inventory Reporting: Screening and Sampling for PFAS Chemicals

Toxic Release Inventory Reporting: Screening and Sampling for PFAS Chemicals

Annika Wallendahl Principal
Annika Wallendahl

Annika has over 15 years of environmental compliance and project management experience in the industrial and manufacturing sectors across the U.S. She specialises in environmental compliance, permitting, training and auditing at industrial facilities and is a licenced professional engineer and geologist.

As a former environmental manager at an industrial facility, she has a deep understanding of industrial facility CAPEX approval processes, timelines, procurement requirements, and project execution.

She has prepared corporate sustainability reports with emphasis on climate change initiatives; and provided cost estimates and return on investment estimates for “green projects” such as fossil fuel reduction projects and waste minimisation.