Federal supply schedule, FSC group. 91. Fuels, lubricants, oils, and waxes, pt. 1 (formerly classes 7 and 51, pt. 4), FSC class 9140, Fuel oils, OSA region 3, District of Columbia, and Maryland, Virginia, and West Virginia, Aug. 1, 1960 July 31, 1961; prepared by GSA Region 3.