Peconic River Project
New information on the Peconic River project will be available on the Long-Term Response Action web page, currently under development. Information on this site is retained to archive the decision process.
The Record of Decision for the Peconic River project, titled "Final Operable Unit V Record of Decision for Area of Concern 30 (Peconic River)," has been approved. Attachments to this document include Appendix A, Appendix B, and Appendix C which consists of Table C-1, Table C-2, and Table C-3. The document's signature page is available.
The Peconic River receives discharges from the Lab's sewage treatment plant. During the remedial investigation, elevated levels of heavy metals (such as mercury, copper, and silver), organic chemicals (such as polychlorinated biphenyls, or PCBs), and low levels of pesticides (such as DDD, a product of DDT degradation) and radionuclides were detected in Peconic River sediment.
Most of the contaminants were found in the top six inches. As expected, contaminants are more prevalent in areas where more sediment is deposited by the river and decrease with distance downriver.
Last Modified: February 1, 2008