GeoPro Talks: Why do Toxicity Reference Values (TRVs) Matter at My Contaminated Site?

A fundamental step in risk assessment is establishing what level of chemical contamination is safe. Toxicity reference values (TRVs) represent an exposure dose that people can safely be exposed to without adverse effects. Toxicity reference values are used to derive drinking water and soil quality guidelines, and to calculate hazard quotients (HQs) that determine risk […]

GeoPro Talks: Creosote Legacy

“Creosote Legacy” back by popular demand: Reidar Zapf-Gilje talks about coal tar and creosote uses for wood preservation and the legacy of contamination that resulted. The recorded Talk covers the properties that makes coal tar and creosote contamination so problematic, and presents some Canadian case studies. The case studies illustrate investigation techniques, remediation solutions and human […]