6.1 Dedicated clean ballast tanks may be topped
up using clean pumps and piping.
6.2 The slop tank contents are to be processed
in accordance with load-on-top procedures.
6.3 The surface of the CBT ballast is to be periodically
inspected for the presence of oil, and the causes of any contaminations
carefully investigated.
6.4 After cargo tank cleaning operations the
pumps and pipelines to be used for clean ballast shall be flushed.