Yeh Gradient - Yeh
Gradient

Senior Scientists

Andrew Yeh, Ph.D.
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Education

Ph.D., Environmental Toxicology, University of Washington

B.S., Biology, Duke University

Expertise

  • Risk Communication
  • Product Safety
  • Risk Assessment
  • Toxicology
  • Causation Analysis

Andrew Yeh, Ph.D.

Senior Toxicologist

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Dr. Yeh is an expert in general, molecular, and environmental toxicology. Dr. Yeh critically evaluates toxicological, epidemiological, and mechanistic data in support of causation analyses in litigation and human health risk assessment projects. He also conducts chemical risk assessments as part of safety evaluations of consumer products and medical devices. Before joining Gradient, Dr. Yeh was a Senior Fellow in the Department of Radiology at the University of Washington (UW) School of Medicine.  He earned a Ph.D. in environmental toxicology at UW, where he examined metabolic effects associated with exposure to contaminants of emerging concern (for example, in pharmaceuticals and personal care products) in the contexts of both ecotoxicity and seafood safety.

Education

Ph.D., Environmental Toxicology, University of Washington

B.S., Biology, Duke University

Expertise

  • Risk Communication
  • Product Safety
  • Risk Assessment
  • Toxicology
  • Causation Analysis

Services

Representative Projects

Causation Analysis:  Evaluated the risk of cancer and non-cancer effects associated with occupational exposure to perchloroethylene and trichloroethylene. 

Causation Analysis:  Evaluated the risk of multiple cancer types associated with occupational exposure to diesel exhaust and other substances (e.g., asbestos, benzene, creosote, and herbicides). 

Human Health Risk Assessment:  Conducted a quantitative risk assessment that concluded a mandated safety test of a children's toy altered the product's chemical structure leading to unrealistic estimates of health risks to children from exposure to boron. 

Product Stewardship:  Reviewed and summarized the human and ecological health hazards of four-membered lactones and their hydrolysis products.  The hazard identification analyses involved using quantitative structure-activity relationship software.

Environmental Risk Assessment:  Generated a database of over 1,000 chemicals present in vehicle fluids or tires, and acute toxicity data in Puget Sound salmon, in an assessment to identify chemicals that may be associated with a salmon mortality syndrome.     

Chemical Product Evaluation:  Providing ongoing support to a City chemical reduction program by evaluating the hazard to human and ecological receptors, and exposure potential (e.g., persistence and bioaccumulation properties), of numerous pesticide and herbicide products.  The evaluations are used to identify and prioritize products for the city's chemical reduction program.

Selected Publications

Meador, JP; Yeh, A; Young, G; Gallagher, EP.  2016. "Contaminants of emerging concern in a large temperate estuary." Environ. Pollut. 213 : 254-267.

See All Andrew Yeh Publications