Final Remedial Investigation/Baseline Risk Assessment for the Ravines and Beach Area Study of the Surplus Operable Unit, Fort Sheridan, Illinois. Volume 1: RI Text and RI Appendices A-I.

摘要

This document is comprised of two separate parts: the Ravines and Beach Area Study Areas of the Surplus Operable Unit (OU) Remedial Investigation (RI) Report and the Ravines and Beach Area Study Areas of the Surplus OU baseline Risk Assessment (BRA). The RI presents the history of the Surplus OU; its geographic, hydrogeologic, and demographic setting; and a brief discussion of the methodologies used to collect the data evaluated in the report. The report also presents the collected data, establishes their validity and usability, and then evaluates the data to establish the nature and extent of the various affected environmental media (i.e., sediment, surface water, and groundwater) in the ravines and Beach Area study areas. The BRA evaluates the detected constituents to establish a list of constituents of potential concern (COPCs). The BRA identifies complete exposure pathways and those receptors potentially exposed to COPCs through these pathways. The BRA also evaluates whether the COPCs detected in the various environmental media in the ravines and Beach Area study areas pose a potential unacceptable risk to human health and the environment. The BRA concluded that the concentrations of COPCs in the various environmental media do not pose an unacceptable risk to human health or the environment.