The Bio-Ecology site is an 11.2 acre tract located in Grand Prairie, Texas. The site is bounded in all directions by private property and also on the east and south by the tributaries of Old Mountain Creek. The Bio-Ecology waste disposal site was a Class I industrial solid waste management facility which was permitted to: (1) incinerate combustible liquids, slurries and sludges; (2) chemically treat acids, caustics and other waste chemical solutions, excluding those containing heavy metals; (3) treat waste waters using biological oxidation; and (4) landfill solids from other treatment processes. The site was actively operated from June 1972 through 1978. The cost-effective remedial alternative includes: raising the elevation above the 100-year flood plain; construction of an on-site disposal cell with synthetic liner and a leachate collection system; construction of a final cover, liner and leachate collection and removal system in accordance with RCRA Part 264; stabilize the waste and encapsulate in an on-site cell; construct a fence; and install a ground water monitoring system in accordance with RCRA Part 264. The capital cost for the selected alternative is estimated to be $2,709,600. Operation and maintenance costs for the first year are estimated to be $20,000.