HETI offers various site investigation services – including subsurface investigations, cause and origin investigations, forensic and fate-and-transport analyses, and indoor air quality evaluations. Typically, site investigations are focused on determining the extent and magnitude of contamination. However, they are also used to support decisions regarding risk characterization and/or site remediation. HETI uses our extensive experience in risk management and site remediation to develop investigative work scopes that provide information necessary to evaluate and design cost-effective approaches to site closure.