Franklin County commissioners have agreed to a new cleanup plan for the Pasco Sanitary Landfill, as proposed by the state Department of Ecology.
The agreement requires the county, as one of 32 potentially liable businesses and government agencies, to do a feasibility study to determine the type, amount and spread of contamination in soil and groundwater at the 250-acre site, about 11/2 miles northeast of the city near Kahlotus Road and highways 12 and 395.
The Department of Ecology will develop a long-term cleanup plan, based on the results of the feasibilitystudy.
Commissioners were briefed about the new directive from Ecology in an executive session Wednesday, then returned to public session before announcing they would sign onto the agreement.
The Pasco landfill was operated as a burning dump until 1971, when it was converted into a sanitary landfill.
The landfill was designed to accept industrial wastes, in drummed and liquid forms.
The agreement notes that the dump site ended up with about 5,000 drums of chlorinated herbicide manufacturing waste.
About 3 million gallons of liquid waste were in the evaporation lagoons, as well as 11,000 tons of chlor-alkali sludge and carbon electrode wastes.
The site has been listed on the Environmental Protection Agency's Superfund priority list for 32 years and is considered a potential threat to ground water.
Interim remedial activities have been occurring at the site since 2002.
The new order from Ecology finds there is potential liability for all the named entities based on hazardous substances at the 250-acre site. In addition to the focused feasibility study, the new order requires ongoing operation, maintenanceand monitoring of any Ecology-approved interim actions that might be necessary.
The hazardous waste found at the site includes industrial and solid wastes, bulk liquids, septic tank taste, sewage sludges, animal fats, metallic wastes and drummed materials.
No one knows just how much contamination is at the site.
-- John Trumbo: 582-1529; firstname.lastname@example.org