The additional study areas to be investigated under the Fort Sheridan DOD OU RI/Feasibility Study (FS) are described in the following sections. The locations of the study areas are shown in Figure 2-1. The study area descriptions summarize the known history and principal findings at each study area from previous investigations. The primary sources of historical information include the Final Archives Search Report (ACE 1996), aerial photographs, discussions with project personnel, and review of historical maps and data obtained from Fort Sheridan.

This document is divided into two main sections -- the Work Plan and the addenda. The Work Plan describes the regulatory history and physical setting of Operable Unit 4-12, previous sampling activities, and data. It also identifies a preliminary conceptual model, preliminary remedial action alternatives, and preliminary applicable or relevant and appropriate requirements. In addition, the Work Plan discusses data gaps and data quality objectives for proposed remedial investigation activities. Also included are tasks identified for the remedial investigation/feasibility study (RI/FS) and a schedule of RI/FS activities. The addenda include details of the proposed field activities (Field Sampling Plan), anticipated quality assurance activities (Quality Assurance Project Plan), policies and procedures to protect RI/FS workers and the environment during field investigations (Health and Safety Plan), and policies, procedures, and activities that the Department of Energy will use to involve the public in the decision-making process concerning CFA Landfills II and III RI/FS activities (Community Relations Plan).

The purpose of this Phase I/II feasibility study is to assemble and screen a list of alternatives for remediation of the 300-FF-5 operable site on the Hanford Reservation. This screening is based on information gathered in the Phase I Remedial Investigation (RI) and on currently available information on remediation technologies. The alternatives remaining after screening provide a range of response actions for remediation. In addition, key data needs are identified for collection during a Phase II RI (if necessary). This Phase I/II FS represents a primary document as defined by the Tri-Party Agreement, but will be followed by a Phase III FS that will further develop the alternatives and provide a detailed evaluation of them. The following remedial action objectives were identified for the 300-FF-5 operable unit: Limit current human exposure to contaminated groundwater in the unit; Limit discharge of contaminated groundwater to the Columbia River; Reduce contaminant concentrations in groundwater below acceptable levels by the year 2018.

This Quality Control Plan has been prepared to address the Feasibility Study (FS) and Remedial Investigation/Site Inspection (RI/SI) Addendum activities and a Change Order to Delivery Order No. 0009 dated July 15, 1993, at the Fort George G. Meade (FGGM). It has been prepared for the U.S. Army Environmental Center (USAEC), formerly the U.S. Army Toxic and Hazardous Materials Agency (USATHAMA), to fulfill the requirement of deliverable ELIN A004 under Task Order 0009 of TEPS contract DAAA15-9l-D-00l6. It has been developed in accordance with the USATHAMA Quality Assurance Program, USATHAMA Geotechnical Requirements, and Guidance for Conducting Remedial Investigations and Feasibility Studies Under CERCLA.

This document presents the scope of work for additional data collection activities and interpretive reports to be performed in the off-post operable unit (OU) for preparation of: (1) Addendum to the final remedial investigation report; (2)' Revision of the draft final endangerment assessment/feasibility study. The plan is divided into the following sections: (1) Requirements for the RI addendum - technical approach and data collection program for the RI addendum - technical approach and data collection program for ground water, soil, sediment, biota, air; (2) Revision of the endagerment assessment - items that need to be reevaluated; (3) Revision of the feasibility study - evaluation of different media and ARAR's development of remedial alternatives; (4) Schedule and description of deliverables. Appendix a contains a detailed approach for the 96th avenue risk assessment.-BKA.