Abstract |
The Broward County Solid Waste Disposal facility (a.k.a. Davie Landfill) is located 10 miles southwest of Fort Lauderdale, Florida near the intersection of Orange Drive and Boy Scout Road. The landfill area includes a 50-acre garbage landfill, an 80-acre trash landfill and a 56-acre sludge lagoon. The facility began operation in 1964 accepting trash and ash from the county's adjacent garbage incinerator. In November 1971, the lagoon was created in an unlined natural depression onsite. Grease trap pump-outs, septic tank and treated municipal sludges were disposed in the lagoon which contains an estimated 75,000 cubic yards of sludge. Initial sampling of the lagoon contents characterize the waste as being in the high range of typical wastewater treatment plant sludge hazardous constituents. In addition, concerns have been raised about the relatively high cyanide and sulfide concentrations detected. The selected remedial action includes: dewatering and stabilization of the sludge lagoon contents and placement in a single-lined sanitary landfill cell; and installation of a cap on the cell that meets the regulatory requirements of 40 CFR 264.310(a). This ROD addresses only source control measures. The decision concerning cleanup of groundwater contamination will be made following an evaluation of these actions and monitoring data. Total capital cost for the selected remedial action is estimated to be $3.0-$3.7 million with annual O&M costs of $100,000. |