Environmental risk assessment is a structured process used by regulatory agencies such as the United States Environmental Protection Agency to evaluate potential impacts of chemical contaminants on human health and ecological receptors.

These assessments help characterize both the nature and magnitude of risk to populations such as residents, workers, and recreational users, as well as ecological systems including wildlife, aquatic organisms, and vegetation. The results are used by regulators and stakeholders to determine appropriate actions needed to protect human health and the environment.

Human Health & Ecological Risk Expertise

AQS conducts both large- and small-scale risk assessments under a variety of regulatory programs, including:

  • Resource Conservation and Recovery Act (RCRA)
  • Comprehensive Environmental Response, Compensation, and Liability Act (Superfund / CERCLA)
  • EPA Brownfields and state-led cleanup programs

Our team brings expertise across:

  • Chemistry and environmental fate
  • Toxicology and exposure assessment
  • Human health and ecological risk modeling
  • Environmental data analysis and interpretation

From Data to Defensible Decisions

AQS supports the full risk assessment process, including:

  • Development of conceptual site models
  • Exposure pathway evaluation
  • Risk calculations and uncertainty analysis
  • Determination of risk-based remediation goals
  • Preparation of clear, regulator-ready reports

We focus on producing assessments that are technically sound, clearly documented, and defensible under regulatory review.

Practical, Cost-Effective Outcomes

Beyond analysis, AQS works with clients and regulators to identify practical and cost-effective approaches for achieving cleanup objectives. Our goal is to balance regulatory requirements with real-world implementation—helping move projects forward efficiently while maintaining protection of human health and the environment.