This document analyzes the potential impacts of the proposed conveyance of 845 acres at March Air Force Base, California, to a private party in exchange for construction of three facilities elsewhere on the base. These facilities would be modern and efficient replacements for three existing facilities currently located on the 845-acre parcel to be conveyed: the Headquarters building of the 15th Air Force; the Non-commissioned Officers Professional Education Center; and the 15th Air Force Band Center. The Environmental Impact Statement (EIS) addresses both the impacts of constructing the new facilities on the Main Base and the impacts of probable development on the 845-acre West March parcel after it has been conveyed to a private party. Environmental effects with the potential for leading to significant impacts were identified in several issue areas and mitigation measures have been suggested that would reduce these impacts to levels that are not significant.