USCG Exam PracticePollution prevention and environmental awareness
Under 33 CFR §151.10, what is the maximum oil content of effluent that may be discharged overboard from machinery space bilges of a non-tanker vessel when more than 12 nautical miles from the nearest land and proceeding enroute?
- ✓ Less than 15 parts per million (ppm)Correct
- B. Less than 100 parts per million (ppm)
- C. Less than 50 parts per million (ppm)
- D. Less than 25 parts per million (ppm)
Why A is correct
33 CFR §151.10(a)(5) states that the oil content of the effluent without dilution must be less than 15 ppm. This is the governing threshold for overboard discharge beyond 12 nautical miles when all other conditions are also satisfied.
Cited:33 CFR §151.10