. . "0001-01-01T00:00:00"^^ . . . "general classification for the heavier oils that remain after the distillate fuel oils and lighter hydrocarbons are distilled away in refinery operations"@en . "0001-01-01T00:00:00"^^ . "residual fuel oil"@en . "http://www.arb.ca.gov/regact/2007/ghg2007/isor.pdf"@en . . . . . .