The report presents a detailed description of the structure, capabilities, and current research activities of virtually all Federal Government R and D Laboratories engaged in environmental studies. Information shown for each of the approximately 170 laboratories includes: name, agency, location, mailing address and telephone number, director, type of installation, mission or main function, extent of environmental research, budget (for past five years, if available), unusual equipment or facilities, number of reports and publications, list of meetings and symposia hosted, list of training programs hosted, floorspace, laboratory history, organization chart, personnel (totals and breakdowns by field, grade, degree, age, etc.), description of physical plant, future plans, and detailed descriptions of major current environmental research programs. The report contains the inventory from USDA/ARS through DOD/USAF. Volume II is SE 015 599. (Author/RH)