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HRS Toolbox

ToolboxThe HRS Toolbox page provides current guidance documents that may be used to determine if a site is a candidate for inclusion on the National Priorities List.


Hazard Ranking System Guidance Manual

The Hazard Ranking System Guidance Manual provides general and technical guidance for individuals involved in determining HRS scores and preparing HRS scoring packages. The manual clarifies terms and concepts in the HRS, presents strategies and specific guidance for scoring select HRS factors, and provides guidelines to assist in collecting and organizing relevant data. For more information on HRS Acronyms and Terms, access the Glossary of HRS Acronyms and Terms (A-L) and Glossary of HRS Acronyms and Terms (M-Z).

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Hazard Ranking System; Final Rule December 14, 1990

This revision to the Hazard Ranking System (HRS) was published in the Federal Register (Volume 55, Number 241) on Friday, December 14, 1990.

Fact Sheets

This collection of fact sheets provides a quick reference guide for HRS scoring and HRS related topics. The fact sheets were published from November 1990 to April 2000.

HRS Scoring and Documentation Tools

The HRS Scoring and Documentation Tools collection currently contains the NPL Characteristics Data Collection Form, the Superfund Chemical Data Matrix (SCDM) and HRS Quickscore.

NPL Listing Policy Documents

The NPL Listing Policy Documents currently contains a Policy for Withdrawing a Proposal to List a Site on the NPL, a Policy for Obtaining a Govenor's Letter prior to Listing on the NPL, and a Policy for Clarifying the Definition of "Site" under the NPL.

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