The report gives results of a study to determine if technology used to capture and control fugitive dust emissions in the foreign practice of steelmaking is superior to that in use domestically. Where apparently superior technology was identified, a feasibility study was performed to show the technology's domestic applicability. Roof-mounted electrostatic precipitators (REPs) were identified as potentially superior technology. Using engineering data from an existing U.S. basic oxygen furnace shop and engineering design details for a Japanese-supplied REP, costs of retrofitting the technology to an existing plant were estimated along with energy consumption, building modifications necessary, utility and wastewater treatment needs, and expected performance. A visible emissions evaluation program was conducted in a Japanese steelmaking plant to determine the effectiveness of REPs in capturing and controlling fugitive emissions. REP electrical performance data obtained during this program and dust characteristics data from three fugitive dust sources in steelmaking operations were input to an electrostatic precipitator (ESP) computer model, and estimated performance was calculated. Good agreement was obtained between the actual measured performance of the REP and the computer--predicted performance for the source where the evaluation program was performed.