The report summarizes the results of a dioxin/furan emissions test of a wood-fired boiler equipped with a fabric filter system for particulate emissions control. The boiler combusts a combination of bark, hogged wood, sawdust, and green and dry planar shavings. The test is the seventh in a series of emission tests conducted under Tier 4 of the National Dioxin Study. The primary objective of tier 4 is to determine if various combustion devices are sources of dioxin and/or furan emissions. If any of the combustion sources are found to emit dioxin or furan, the secondary objective of Tier 4 is to quantify these emissions. Wood-fired boilers are one of eight combustion device categories that have been tested in the Tier 4 program. The tested boiler, hereafter referred to as Boiler WFB-A, was selected for this test after an initial information screening and a 1-day pretest survey. The logs which are processed at the plant are stored in a salt water body adjacent to the plant. Thus, the feed to Boiler WFB-A has a higher inorganic chloride content than the feed to most wood-fired boilers. Boiler WFB-A is considered representative of those wood-fired boilers in the United States firing salt-laden wood. Data presented in the report include dioxin (tetra through octa homologue +2378 TCDD) and furan (tetra through octa homologue +2378 TCDF) results for both stack samples and ash samples. In addition, process data collected during sampling are also presented.

Final. "Radian Corporation." Distributed to depository libraries in microfiche. "April 1987." Includes bibliographical references (p. R-1). "EPA-450/4-84-014p."