The purpose of this investigation is to conduct a remedial investigation/feasibility study at the HHA and FTA sites at Fort Meade. As part of the analyses, data gaps will be identified. Previous studies have been conducted by Arthur D. Little, Inc., and EA engineering, Science and Technology, Inc. The RI/FS process is designed to collect sufficient data of demonstrable quality, which can then be used to assess potential risks to human health and the environment, develop/evaluate remedial alternatives, and select a preferred remedial action. In general, data obtained during the RI phase is used to evaluate the nature, extent, and migration of contaminants at sites that are known or believed to have been adversely impacted by past hazardous waste or hazardous materials handling practices. The FS phase evaluates potential remedial action with regard to effectiveness, risk reduction or mitigation, implementability, and cost.