The regulation of hazardous air pollutants under the Clean Air Act Amendments of 1990: further effects on the Portland cement industry

Title III of the 1990 Clean Air Act Amendments (CAAA) addresses the control of hazardous air pollutants, or HAPs, from major sources of air pollution in the United States. This paper outlines the recent activities (during 1995) undertaken by the US Environmental Protection Agency to regulate HAP emissions from Portland cement plants and reports on the progress of projects in the technical program developed by the Portland cement manufacturing industry. Key issues will include the need for subcategorization of the industry to comply with standards, correcting estimates of emissions from Portland cement kilns made by others, and preparation of protocols/methods for effective measurement of HAPs.