The large quantities of sulfur related emissions possible for a commercial oil shale facility point up the need for control of such emissions to prevent adverse impacts on air quality. Releases of sulfur dioxide produced during the combustion of hydrogen sulfide quickly consume the Prevention of significant Deterioration increment and can easily produce pollutant levels that exceed National Ambient Air Quality standards. Within the U. S. Environmental Protection Agency, the Oil Shale Energy and Mining branch of the Industrial Environmental Research Laboratory is responsible for conduction research related to the assessment of the environmental impacts of oil shale processing and for developing and applying control technologies to minimize these impacts. This report is part of a study initiated by this group to determine the feasibility of using a suitable acid gas removal technology to control emissions of reduced sulfur compounds. The study entails field evaluation of a pilot plant, and the acid gas removal technology selected for testing was the Stretford process.