Risk Assessment


In 1993 EPA prepared a baseline risk assessment for the Grasse River. The 1993 document identified PCBs as the primary chemical of concern for the Grasse River, and eating fish containing PCBs as posing the greatest potential risk. In 2002, Alcoa updated the human health portion of EPA's baseline risk assessment to incorporate the significant amount of Grasse River data that had been collected since 1993 along with the most current scientific and regulatory policy on risk evaluation. The 2002 update was conducted with input from EPA personnel and in accordance with EPA-approved methods, and was reviewed and approved by EPA. Updates were also prepared in 2010 and 2011 to complete the risk assessment work.

Click on the Human Health and Ecological links above to read details of the assessment. To learn more about the risk assessment process, read Assessing Health Risks.