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In DOE’s response to comments on the mills proposed biomass cogeneration project, the fuels currently burned by Power Boiler #10 were clarified. Fuels burned post-project would not change, though their relative balance would.
Currently acceptable fuels used in PB10 include:
Wood fuels including hog fuel, forest biomass and urban wood. Wood fuels do not include wood treated with creosote, pentachlorophenol, or copper-chrome-arsenic; or municipal waste.
Forest biomass means the by-products of current forest management activities, current forest protection treatments authorized by the agency, or the by-products of forest health treatment prescribed or permitted under Washington’s forest health law. Forest biomass does not include municipal solid waste.
Urban wood meeting an acceptance program is purchased and used as fuel in the power boiler. PTPC currently has acceptance criteria prohibiting wood treated with creosote, pentachlorophenol, or copper-chrome-arsenic; or municipal waste. Also, hazardous material contaminants (asbestos, lead, mercury), lead painted items, and plastic coatings are prohibited. The acceptance program is currently included in PTPC contracts for urban wood.
Ecology does not currently consider any of the purchased materials to be a solid waste. Should a determination occur in the future redefining the materials, their status as a boiler fuel would be re-evaluated.
Oil, including reprocessed fuel oil (RFO).
Primary sludge from the process wastewater treatment plant. The sludge has been dewatered and burned in PB10 for about 30 years. The primary sludge will continue to be burned in PB10. (Note: The process and sanitary wastewater systems are separate. Sanitary wastewater is treated at a small wastewater treatent plant at the mill. Waste sludge from the sanitary wastewater treatment plant is hauled to the local municipal wastewater treatment plant for disposal. It does not enter the PB10 fuel stream.)
Burnable rejects from the mill and the old corrugated container (OCC) recycle facility, which are processed to remove plastics and metal prior to use as a fuel.
Question: The restrictions on urban wood do not specify adhesives used for composite board. Is it considered okay to burn plywood, OSB board and particle board?<div> </div> </body>