What is slop oil for oil tanker?

Slop oil is a mixture of oil, water, and other contaminants that accumulates in the bilges of oil tankers during operations. It typically includes residues from cargo, cleaning fluids, and rainwater, making it a hazardous waste that requires careful handling and disposal. Regulations mandate that slop oil must be treated or disposed of properly to prevent environmental pollution. Tankers often transfer slop oil to shore facilities equipped to process it safely.