Appendix D to Part 157 - Example of a Procedure for Dedicated Clean Ballast Tanks Operations
33:2.0.1.5.26.11.195.1.11 : Appendix D
Appendix D to Part 157 - Example of a Procedure for Dedicated Clean
Ballast Tanks Operations
1. Source. The example procedure for dedicated clean
ballast tanks operation contained in this appendix conforms to the
Annex of Resolution 14 of the MARPOL Protocol.
2. Example Procedure. Dedicated clean ballast tanks
operational procedure:
(a) Before arrival at the loading port:
(1) Transfer all remaining oily mixtures to a cargo tank.
(2) Ensure that the pumping and piping designated for clean
ballast operation have been properly cleaned to accommodate
simultaneous discharge of clean ballast while loading.
(3) Ensure that all valves to the slop tank and the cargo tanks
are closed.
(4) Perform visual inspection of all dedicated clean ballast
tanks and their contents, if any, for signs of contamination.
(5) Discharge a sufficient amount of clean ballast water to
ensure that remaining ballast water and cargo to be loaded will not
exceed the permissible deadweight or draft. Leave a sufficient
amount of water for flushing the piping, and as a minimum, a
quantity equal to 10 times the volume of the affected piping.
(6) Ensure that all valves to the dedicated clean ballast tanks
are closed.
(7) If no further ballast discharge is anticipated, drain the
clean ballast piping.
(b) In the loading port:
(1) Perform normal loading operations of cargo tanks.
(2) Ensure sufficient slop tank capacity is available for
subsequent reception of cargo pump and piping flushings.
(3) When applicable, discharge remaining clean ballast before
entire piping system is used for loading. Leave the required
minimum quantity of flushing water in ballast tanks.
(4) Ensure that all valves to the dedicated clean ballast tanks
are closed.
(5) Ensure that all valves to the cargo tank are closed upon
completion of loading.
(c) After departure from the loading port:
(1) Flush appropriate pumping and piping with sufficient water
from dedicated clean ballast tanks into a slop tank.
(2) Ensure that valves to the slop tank are closed before
pumping the remaining clean water overboard and monitoring oil
content of the water.
(3) Ensure that all valves in the dedicated clean ballast tanks
are closed.
(d) Before arrival at the unloading port:
(1) Ensure that all valves to the slop tank and cargo tanks are
closed.
(2) Recheck that the pumping and piping designated for clean
ballast operation have been properly cleaned.
(3) Ballast through clean cargo pumps and piping, considering
the port's draft requirements.
(4) Ensure that all valves in the dedicated clean ballast tanks
are closed.
(e) In the unloading port:
(1) Allocate pumping and piping intended for clean ballast
operation.
(2) Perform normal unloading operations.
(3) As soon as draft conditions permit, complete ballasting to
departure conditions.
(4) Ensure that all valves to the dedicated clean ballast tanks
are closed.
(5) Complete unloading.
(f) After departure from the unloading port:
(1) Flush pumps and piping servicing the dedicated clean ballast
tanks into the slop tank.
(2) Top up dedicated clean ballast tanks.
(3) Process the slop tank content in accordance with load on top
(LOT) procedures.
[CGD 77-058b, 45 FR 43717, June 30, 1980, as amended by
USCG-2000-7641, 66 FR 55573, Nov. 2, 2001]