Vessel Pollution and Dangerous Chemicals Regulations

Marginal note:Procedures — Category X

• 63 (1) A tank from which a Category X noxious liquid substance has been unloaded must undergo a tank prewash operation before the vessel leaves the port of unloading unless the vessel has been granted an exemption from a tank prewash operation.

• Marginal note:Exemption

  (2) On request by the master of a vessel, a marine safety inspector may grant an exemption from a tank prewash operation if the inspector is satisfied that

  • (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.

• Marginal note:Transfer of effl‡uent

  (3) Subject to subsection (4), the tank prewash operation must be carried out by washing the tank and transferring the effluent to a reception facility that can receive the effluent in an environmentally safe manner until the concentration of the substance in the effluent has fallen to 0.1% by weight, and then by continuing to transfer the remaining effluent to the facility until the tank is empty.

• Marginal note:If not feasible

  (4) If it is not feasible to measure the concentration of the substance to ensure that it falls within the limit specified in subsection (3) without causing undue delay to the vessel, the tank prewash operation must be carried out by washing the tank and transferring the effluent to a reception facility in accordance with subparagraph 61(b)(i).

• Marginal note:Marine safety inspector

  (5) The tank prewash operation must be carried out in the presence of a marine safety inspector who endorses the appropriate entries in the vessel’s Cargo Record Book required by subsection 79(1).