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Title: Evaluating ground water plumes under the hazard ranking system. Fact sheet

Abstract

This fact sheet provides information on potential National Priorities List (NPL) sites evaluated as contaminated ground water plumes with no identified source of contamination and how such sites are evaluated under the Hazard Ranking System (HRS). It defines steps that should be taken before a ground water plume can be evaluated as a source of contamination and summarizes scoring considerations for sites that consist solely of a ground water plume. Responses to commonly asked questions about evaluating contaminated ground water plumes at potential NPL sites are also presented. This fact sheet provides guidance only and may be amended by EPA on a site-specific basis.

Publication Date:
Research Org.:
Environmental Protection Agency, Office of Emergency and Remedial Response, Washington, DC (United States)
OSTI Identifier:
676213
Report Number(s):
PB-98-963326/XAB; EPA-540-F-98-051
TRN: 83281126
Resource Type:
Technical Report
Resource Relation:
Other Information: DN: See also PB98-963327.; PBD: Sep 1998
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; GROUND WATER; PLUMES; HAZARDOUS MATERIALS; US SUPERFUND; AQUIFERS; MONITORING; WATER POLLUTION; POLLUTION SOURCES; REMEDIAL ACTION; SITE CHARACTERIZATION

Citation Formats

NONE. Evaluating ground water plumes under the hazard ranking system. Fact sheet. United States: N. p., 1998. Web.
NONE. Evaluating ground water plumes under the hazard ranking system. Fact sheet. United States.
NONE. Tue . "Evaluating ground water plumes under the hazard ranking system. Fact sheet". United States. doi:.
@article{osti_676213,
title = {Evaluating ground water plumes under the hazard ranking system. Fact sheet},
author = {NONE},
abstractNote = {This fact sheet provides information on potential National Priorities List (NPL) sites evaluated as contaminated ground water plumes with no identified source of contamination and how such sites are evaluated under the Hazard Ranking System (HRS). It defines steps that should be taken before a ground water plume can be evaluated as a source of contamination and summarizes scoring considerations for sites that consist solely of a ground water plume. Responses to commonly asked questions about evaluating contaminated ground water plumes at potential NPL sites are also presented. This fact sheet provides guidance only and may be amended by EPA on a site-specific basis.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Sep 01 00:00:00 EDT 1998},
month = {Tue Sep 01 00:00:00 EDT 1998}
}

Technical Report:
Other availability
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  • The Hazard Ranking System (HRS) is the scoring method EPA uses to assess the relative threat associated with the release or potential release of hazardous substances from a waste site. The HRS is the primary mechanism used by EPA to determine which sites should be placed on the National Priorities List. The manual is targeted primarily to HRS scorers and HRS package preparers, who frequently are government contractors or State agency staff. Inexperienced scorers should find it especially helpful as a reference while they 'learn' the HRS. Others involved in EPA's site assessment process (e.g., HRS package reviewers) should alsomore » find parts of the manual useful.« less
  • The Fact Sheet discusses the revised HRS which retains the same cutoff score and basic approach as the original HRS, while incorporating SARA requirements as well as improvements identified as necessary by EPA and the public. The revised HRS retains the ground water, surface water, and air pathways, drops the direct contact and fire/explosion pathways, and adds a fourth pathway, soil exposure. Several key provisions of the revised HRS make it more comprehensive. Other provisions make the revised HRS more accurate. The complexity and scope of the issues involved in revising the HRS required EPA to get widespread input. Themore » majority of the commenters believed that the revised HRS represented an improvement over the original HRS. The result is a revised HRS that is a practical and effective tool in identifying the nation's worst hazardous waste sites.« less
  • The Fact Sheet discusses U.S. Environmental Protection Agency (EPA) revised Hazard Ranking System (HRS) in response to the Superfund Amendments and Reauthorization Act (SARA). These revised HRS Qs and As address the SARA requirements for the revised HRS, specific revisions to the HRS, the impact of the revised HRS on the site assessment and remedial processes, and selection of the cutoff score.
  • The Fact Sheet discusses the Hazard Ranking System (HRS) in response to the Superfund Amendments and Reauthorization Act of 1986 (SARA). The HRS is the scoring system EPA uses to assess the relative threat associated with the release or potential release of hazardous substances from a waste site. The HRS score is the primary criterion EPA uses to determine whether a site should be placed on the National Priorities List (NPL). The NPL identifies sites that warrant further investigation to determine if they pose risks to public health or the environment. Sites on the NPL are eligible for long-term 'remedialmore » action' financed under the Comprehensive Environmental Response, Compensation, and Liability Act of 1980 (CERCLA), as amended by SARA. SARA authorizes a 'Hazardous Substances Superfund' totalling $8.5 billion over 5 years to pay costs not assumed by those responsible for problems at a site. The HRS uses data that can be collected relatively quickly and inexpensively, thus allowing most Superfund resources to be directed to remedial actions at sites on the NPL.« less
  • The report provides an overview of the NPL listing process and historical data summaries on the NPL from 1981-1991.