Treacherous \Treacher*ous\, a. [See Treacher.] Like a traitor; involving treachery; violating allegiance or faith pledged; traitorous to the state or sovereign; perfidious in private life; betraying a trust; faithless. [1913 Webster] Loyal father of a treacherous son.
Fuel Safety Tips. 1  If you need to transport fuels such as propane, gasoline or oil, it should only be carried in approved containers certified by agencies such as the Canadian Standards Association or Underwritersâ Laboratories of Canada. 2  Containers should never be filled right to the top.
Turn the appliance off and do not touch it until it has been checked by a Gas Safe registered engineer. If you suspect there is a gas leak you should immediately do the following: 1  Call National Grid's Gas Emergency Freephone number: 0800 111 999.he Gas Safety (Installation and Use) Regulations 1998 and Building Regulations require flues to be installed in a safe position at specified distances from the boundary, however there might be installations that do not comply but still operate safely.