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 includes

  • Dr Jeff Peterson Principal Scientist
    Dr Jeff Peterson

    Jeff Peterson has over 27 years of experience managing projects that assess risks hazardous substances may pose to human health and the environment. He also provides clients and project managers with strategic and regulatory guidance. His areas of specialty include ecology, toxicology, and statistics. Jeff has performed over one hundred risk assessments for numerous facilities, including oilfields, landfills, airports, and a diverse array of industrial sites. On behalf of private companies and municipalities, he has negotiated favorable outcomes with a variety of state and federal regulatory agencies.

  • Cindy Ott Senior Scientist
    Cindy Ott

    Cindy has over 30 years of experience in providing consultation in the areas of human health and ecological risk assessments (HHERA), contaminated site investigation and management, environmental chemistry, environmental impact assessment, hydrogeology and environmental analytical chemistry. An experienced scientist and project manager, Cindy possesses a unique combination of direct experience in ecological and human health risk assessment, and direct experience in contaminated sites investigation and monitoring.  She is a past President of the BC Society of Contaminated Sites Approved Professionals (CSAP).

  • 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. 


  • Tarah Hagen Technical Discipline Manager
    Tarah Hagen

    Tarah has over 14 years’ experience in conducting screening and detailed human health and ecological risk assessments for a variety of industries and government. Included are industrial emissions, contaminated land and water, consumer goods and food. She has written and co-written numerous major reports, which have been influential in shaping Australian health risk assessment methodology and policy decisions in relation to environmental issues. She is only one of a few consultant toxicologists in Australia certified by the American Board of Toxicology