Vessel Pollution and Dangerous Chemicals Regulations
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 be washed 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.
(3) Subsection (2) does not apply if
(a) the tank is reloaded with the same substance or a substance that is compatible with it and the tank is neither ballasted before loading nor washed after the vessel leaves the port of unloading;
(b) the vessel’s master notifies in writing the Department of Transport Marine Safety Office nearest to the vessel that the tank will be washed at another port that has adequate reception facilities; or
(c) the cargo residues are removed from the tank by a ventilation procedure.
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