🔍 Key Concepts

• 33 CFR Part 151 – Vessel source pollution and definitions • The regulatory definition of "discharge" for oil or harmful substances • Normal operating procedures vs. accidental or improper releases

💭 Think About

• Ask yourself: which option describes an action that is part of a controlled, routine procedure rather than pollution going into the water? • Which choices clearly involve an unintended or harmful release to the marine environment? • Think about how authorities check tanks and cargo: do they need a way to legally take small quantities without it counting as pollution?

✅ Before You Answer

• Look up the exact regulatory definition of "discharge" in the pollution rules (for oil and for hazardous substances). • Identify which choices obviously mean product is entering the marine environment in an uncontrolled or harmful way. • Verify which one can be done in a controlled, minimal way for inspection or testing without being treated as pollution.