The purpose of the Southern Study Area (SSA) Report is to present the Army's Remedial Investigation (RI) results for the southern portion of Rocky Mountain Arsenal (RMA). This document is a formal RI product in accordance with the proposed Federal Facilities Agreement and Settlement Agreement (1988), the RMA Technical Program Plan (TPP) (PMO, 1988/RIC 88131R01), and the June 1985 U.S. Environmental Protection Agency (EPA) RI Guidance Document. The seven completed RI Study Area Reports (SARs), along with the RI media reports for air, biota, buildings, and water, fulfill the requirements of defining the nature and extent of contamination, and completing a comprehensive RI for the On-post Operable Unit of RMA as required by the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA), the Superfund Amendments and Reauthorization Act (SARA), and the National Contingency Plan (NCP). The SSA report integrates known historical information, the results of previous investigations, and the current RI programs for buildings, soil, surface water, groundwater, biota, and air to present an overall environmental contamination assessment of the study area as required under Contract Numbers DAAA15-88-D- 0024. The SSA Report represents Volume VI of the overall RMA Remedial Investigation.

The Eastern Study Area (ESA) Report summarizes a portion of the Remedial Investigation (RI) conducted at Rocky Mountain Arsenal (RMA). This report, Volume VII of the On-Post RI, integrates the study area history, geology, and hydrology with the results from soil, surface water, groundwater, air, biota, and structures investigations to identify contaminant sources, distribution patterns, and migration pathways. The ESA encompasses approximately 10 square miles on the eastern tier of RMA, and includes all of Sections 5, 19, 20, 30, 31, and 32 and portions of Sections 6, 7, 8, 20, 24, and 25. The ESA shares information along the western boundary from five adjacent study areas, including the Southern, South Plants, Central, North Plants, and North Central Study Areas. The boundaries of the ESA were chosen to delineate an area which is east of the primary manufacturing and disposal facilities on RMA. As the boundaries are drawn, no groundwater contaminant plumes are identified within the ESA, and the entire length of First Creek within RMA boundaries is in the ESA.