Vessel Pollution and Dangerous Chemicals Regulations

Marginal note:Interpretation

• 64 (1) The following definitions apply in this section.

  high-viscosity substance

  high-viscosity substance means a noxious liquid substance in Category X or Y with a viscosity equal to or greater than 50 mPa·s at the unloading temperature. (substance à viscosité élevée)

  solidifying substance

  solidifying substance means a noxious liquid substance that at the time of unloading is

  • (a) at a temperature of less than 5°C above its melting point, in the case of a substance with a melting point below 15°C; or

  • (b) at a temperature of less than 10°C above its melting point, in the case of a substance with a melting point of 15°C or higher. (substance qui se solidifie)

• Marginal note:Procedures — Categories Y and Z

  (2) A tank from which a Category Y or Z noxious liquid substance has been unloaded must undergo a tank prewash operation before the vessel leaves the port of unloading if

  • (a) the unloaded substance is a Category Y noxious liquid substance that is a high-viscosity substance or a solidifying substance; or

  • (b) the unloading operation is not carried out in accordance with the vessel’s procedures and arrangements manual.

• Marginal note:Non-application

  (3) Subsection (2) does not apply if

  • (a) the unloaded tank will be reloaded with the same substance or another substance compatible with the previous one and will not be washed or ballasted prior to loading;

  • (b) the unloaded tank will not be washed or ballasted at sea and the vessel’s master has given written notice to the Department of Transport Marine Safety Office nearest to the vessel that the tank will undergo a tank prewash operation at another port and that this other port has confirmed in writing that it has a reception facility that is available and adequate for such a purpose; or

  • (c) the cargo residues will be removed from the tank by a ventilation procedure.