Hazard Ranking System Score. A mathematical score given to each Superfund site, used to set priorities for cleanup of sites. Also called an HRS score.

Hazard Ranking System . HRS is the principal mechanism EPA uses to evaluate uncontrolled waste sites for possible inclusion on the National Priorities List (NPL). HRS assigns each site a score ranging from 0 to 100. Sites receiving HRS scores of 28.50 and above are eligible for the NPL.

HAZARD RANKING SYSTEM. A scoring system used to evaluate potential relative risks to public health and the environment from releases or threatened releases of hazardous substances. The EPA used the HRS to calculate a site score for NAF Adak. The HRS is based on the ability of actual or potential releases of hazardous substances from a site through air, surface water or groundwater to affect people. This score was the primary factor used to decide whether NAF Adak should be placed on the National Priorities List.

Hazard Ranking System. the method EPA uses to assess and score the hazards posed by a site that takes into account the nature and extent of contamination and the potential for the hazardous substances to migrate from the site through air, soil, surface water, or groundwater; HRS scores are used to determine whether a site should be placed on the National Priorities List (NPL)

Hazard Ranking System, a ranking system used by the EPA to establish the National Priorities List for federal Superfund cleanups

Human Resources System

Human Resource System