“…Hall of the United States Environmental Protection Agency, using an air atomizing oil burner rated at 250,000 BTU/h heat input. Respirable particulates were collected from a dilution tunnel by electrostatic preciptation using a massive air volume sampler (Hall, 1983). Analysis of the particles showed certain metals were present at relatively high levels, for example: Pb, 75.6 mg/g; Zn, 23.0 mg/g; and Fe, 5.3 mg/g.…”