B-1.1, r. 2 - Construction Code

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8.207. A key-operated facility for loading a tank truck or tank car that is supplied by an aboveground tank in a bulk plant must have a remote control shut-off valve that opens only when the motor of the loading pump is operating.
The valve must be located at the outlet of the tank if the bulk plant is to be left unattended.
O.C. 220-2007, s. 1.