Tag: HRS

Subsurface Component Added to Superfund Ranking System

In a final rule, the EPA has added a subsurface intrusion component to the hazard ranking system (HRS) the Agency uses when considering whether to add sites to the Superfund’s National Priorities List (NPL). Until this action, the HRS, which was promulgated in 1990, did not consider the threat posed by subsurface intrusion when evaluating […]