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Given the limited availability of suitable emission factors, sources must often rely on source test data from their specific operations or data from similar sources at other metalcasting facilities.
A considerable body of new emission information for a variety of foundry processes has been developed from research programs, and accumulated source test data from around the country.
Like most other industries compiling Title V emissions inventories, the typical foundry relies mostly on published emission factors, unless source test data or other information specific to the subject facility is available.