15 ppm separator means a separator that is designed to remove enough oil from an oil-water mixture to provide a resulting mixture that has an oil concentration of 15 ppm or less.
Bilge alarm means an instrument that is designed to measure the oil content of oily mixtures from machinery space bilges and fuel oil tanks that carry ballast and activate an alarm at a set concentration limit and record date, time, alarm status, and operating status of the 15 ppm separator.
(2) Is not owned or controlled by a manufacturer, supplier, or vendor of separators, oil content meters, or bilge alarms.
Oil content meter or meter means a component of the oil discharge monitoring and control system that is designed to measure the oil content of cargo residues from cargo tanks and oily mixtures combined with these residues.
PPM means parts per million by volume of oil in water.
Response time means the time elapsed between an alteration in the sample being supplied to the bilge alarm and the ppm display showing the correct response.