Abstract
The US Environmental Protection Agency (EPA) revised the procedures for evaluating sites contaminated with hazardous substances and pollutants under the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA), as amended by the Superfund Amendments and Reauthorization Act (SARA). Revised procedures include substantial changes to the Hazard Ranking System (HRS), the scoring system EPA uses to assess a site`s relative threat to human health and the environment and subsequent inclusion on the National Priorities List (NPL). A preliminary assessment (PA) is the first step in evaluating a site pursuant to CERCLA, the National Contingency Plan (NCP), and the HRS. Site inspection (SI) -- the second-step -- is conducted when the PA indicates that further investigation under CERCLA is needed. This Information Brief provides an overview of the SI process and its relationship to the HRS and other site activities under CERCLA and the Resource Conservation and Recovery Act (RCRA), and the information required to develop the HRS score for a site. A companion Information Brief provides an overview of the PA process.
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