Keep a detailed log of when the separator is inspected, maintained, emptied and serviced. Also record specific
events relating to the separator system such as cleaning, repairs, accidents and incidents.
All sites should empty their separator as soon as a significant quantity of oil and/or silt has built up. The retained
waste, including the silt, must be removed and the separator must be refilled with clean water before being put
back in to service to prevent damage and to prevent oil passing through it. In addition to normal emptying of the
separator, it will also need to be emptied right away if oil or silt levels exceed 90 per cent of the storage volume of
the separator and the alarm is activated (see Section 5b). When the oil or silt reaches this level or after a spillage,
employ a registered waste removal company to empty the separator (see Section 8 for information about waste
management). For all waste removal operations you must make sure that the waste removal company has
experience in emptying separators and that they do not allow any of the contents to escape from the outlet during
Every five years it is recommended that separators be emptied and given a general inspection to test the integrity
and performance of the system. The separator must be refilled with clean water following such an inspection.