Hazard Ranking System, remediation site

TTie U. S. Environmental Protection Agency (EPA) developed the Hazard Ranking System (HRS) (1) to determine priorities among releases, or threatened releases, from remediation sites. The HRS applies the appropriate consideration of each of the following site-specific characteristics of such facilities ... 

CERCLA has set up a remedial scheme for analyzing the impact of contamination on sites under a hazard ranking system, from which a list of prioritized disposal and contaminated sites is compiled. This list is known as the National Priorities List (NPL). The NPL identifies the worst sites in the nation, based on such factors as the quantities and toxicity of wastes involved, the exposure pathways, the number of people potentially exposed, and the importance and vulnerability of the imderlying groundwater. 

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