The report gives results of a search of U.S. literature to identify published information about trace metals and Stationary Conventional Combustion Processes (SCCPs). The report summarizes the information found in the literature and includes specific references. It summarizes what has been published about ambient trace metals in air, water, and soils. A survey, reporting the trace metal concentration in combustible fuels, identifies coal as the fuel of most concern; generally, trace metal levels in coal are similar to their crustal abundances. It reviews conventional combustion technology. It discusses trace metal flows and partitioning around various types of boilers and pollution control devices, and reports data from cited studies. In addition to coal, the report gives data for oil, municipal refuse, and wood. It also covers emissions to air, water, and soil, including trace metal leaching. It documents the health and environmental effects of trace metals. Where possible, it assesses specific contributions from SCCPs. It covers environmental transport systems, as well as special problems associated with radioactive metals and SCCPs.