LLNL Environmental Sciences Research Program The LLNL Environmental Sciences Research Program ex- plores ways in which developing energy technologies mayaffect the environment. It focuses on the flow of pollutants through the environment and the food chain to man and othertarget organisms. It includes studies of the composition and transport of pollutants, the physical, chemical, and biological transforma- tions that they undergo, and their effect on aquatic organisms and terrestrial plants. It also includes development of new monitoring instruments and integrated assessmentsof the total _ environmental impact of energy operations. Its goal is to provide data that will make possible the development of benign energy technologies. Support for our work comeslargely from the the U.S. Department of Energy's Office of Environment, which has the major responsibility within DOE for evaluating the effects of DOE programs on health, safety, and the environment. Somein- dividual projects are funded by other Federal agencies, in- cluding the Nuclear Requlatory Commission, the Department of the Interior, the Environmental Protection Agency, and the Department of Defense. Our program addresses environmental concems associated with nuclear, geothermal, and fossil-fuels technologies. In the nuclear area, we are studying the long-term effects of plutonium, other selected radionuclides, and copper corrosion products along the coasts and in the ocean (including their uptake and transfer through food chains). We are also assessing the potential radiation dose to natives of the Bikini and Enewetak atolis (in the Marshall Istands) who are returning to islands contaminated by nuclear explosions in the 1940s and 1950s. In the geothermal area, we have conducted an integrated assessment of health, environmental, and socioeconemic issues raised by the prospect of geothermal development in California’s Imperial Valley. At The Geysers geothermal area (also in California), we are participating in a program whose overall purpose is to assess environmental issues associated with the development of known geothermal resource areas in d a a> iO a dn the United States. Fossil fuel technologies specifically addressed in our program are direct coal combustion, oil extraction, in situ coal _ gasification, and in situ oil shale retorting. We are also concerned with the consequences of a large-scale liquefied-naturalgas accident. In the Septemberissue of Energy and Technology Review, we described environmental research at LLNL related to fossil fue! technologies. In this issue, we will describe recent work relating to nuclear, geothermal, and liquefied-gaseous-fuel technologies. For further information contact Richard C. Ragaini (4223840).