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Responding to Pollution by Oil and other Harmful Substances

Learn about the importance of preventing oil pollution, the behavior of oil in the marine environment, and effective mitigation strategies for oil spills.

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Responding to Pollution by Oil and other Harmful Substances

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  1. Response to spills of oil and other harmful substances Responding to Pollution by Oil and other Harmful Substances

  2. Response to oil spills • Importance of prevention of oil pollution • Escape of 100 tons of a light oil • Spill 2km2 • 90 tons within an area of 1 km2 • 20 tons will evaporate in 24 hours • Rest of oil might emulsify increasing the quantity to 280 tons • If this quantity comes ashore around 1,000 to 3,000 tons of oily waste • will be collected

  3. Response to oil spills • Importance of prevention of oil pollution

  4. Response to oil spills Historical background • Oil was known to human since ancient times. • Primitive humans observed flames coming out of the land, especially in the Persian Gulf and the Caspian Sea regions. • Egyptians used asphalt for mummifying the dead. • Ancient Greek doctors Hippocrates and Galinos considered it as a valuable medicine. • The infamous “water fire” of the Byzantines must have had oil as its main content.

  5. Response to oil spills The complex composition of crude oil and its products • Crude oil is mainly made up of hydrocarbons with a molecular weight varying from that of methane to those of heavy molecules containing more than 80 carbon atoms. • It contains oxygen, sulfur and nitrogen compounds as well as traces of metals. • Its behavior and impact on the marine environment depend on the composition of the oil and the environmental conditions • Based on specific gravity, we classify oil into: • - Light oils • - Intermediate to heavy oils • - Heavy oils, including residual oils and marine fuel oils.

  6. Response to oil spills Behavior of oil into the sea – Critical factors • Specific gravity • Boiling point • Viscosity • Pour point • Flash point • Solubility • Asphaltenes content

  7. Response to oil spills Behavior of oil into the sea

  8. Response to oil spills Behavior of oil into the sea • The most important process that removes oil from the sea surface. • The higher the boiling point, the faster and more extensive the evaporation • Crude oil may lose up to 40% of its volume in the firs 48 hours. • Heavy fuel oilscontain few volatile compounds and usually show a low degree of evaporation Evaporation

  9. Response to oil spills Behavior of oil into the sea Evaporation of 7 tonsHFO (380 cSt) in summer season

  10. Response to oil spills Behavior of oil into the sea Evaporation of 7 tons of crude oil in winter season

  11. Response to oil spills Behavior of oil into the sea Evaporation of 70 tons of diesel oil Evaporation of gasoline

  12. Response to oil spills Behavior of oil into the sea Emulsification (Water-in-Oil Emulsion)

  13. Response to oil spills Behavior of oil into the sea Emulsification(Water-in-Oil Emulsion)

  14. Response to oil spills Behavior of oil into the sea Movement of a slick on the surface of the sea

  15. Response to oil spills Behavior of oil into the sea Movement of a slick on the surface of the sea 2 hours simulation of a 350 tons oil spill Light Crude oil Heavy Fuel oil

  16. Response to oil spills Permissible oil discharges from E/R

  17. Response to oil spills • SPILL PREPARDNESS AND RESPONSE - ΜΑRPOL 73/78 - OPRC’90/HNS 2000

  18. Response to oil spills Spill Contingency Plans SOPEP, All ships Oil SMPEP, Tankers carrying noxious liquid substances NLS

  19. Response to oil spills Shipboard Oil Pollution Emergency Plan Basic Elements • Reporting procedure • List of Authorities that must be notified in case of a pollution incident • Actions to be taken by the ship’s crew for mitigating or limiting pollution • Procedures for the coordination of the response operation in cooperation with national and local authorities • Training – Drills

  20. Response to oil spills Shipboard Oil Pollution Emergency Plan

  21. Steps to control the discharge - Priority actions The Master’s priority will be to ensure the safety of personnel and the ship, and to take action to prevent escalation of the incident. 2. Prior to considering remedial action, the Master will need to obtain detailed information on the damage sustained by the ship. 3. Having assessed the damage sustained by the ship, the Master will be in position to decide what action should be taken to prevent or minimize further discharge Response to oil spills Shipboard Oil Pollution Emergency Plan

  22. Mitigating Activities When the safety of both the ship and personnel has been addressed, the Master can initiate mitigating activities, having the overall responsibility for continuous monitoring and assessment of the situation and act respectively. Assessment and monitoring requirements Personnel protection issues (protective equipment and threats to health and safety) Containment and other response techniques (e.g. dispersing, absorbing, neutralization) Isolation procedures Decontamination of personnel Response to oil spills Shipboard Oil Pollution Emergency Plan

  23. Transfer of Bunker / Cargo Lightening Should the ship sustain extensive structural damage, it may be necessary to transfer all or part of the bunker oils to another ship/barge. The Plan should provide guidance on procedures to be followed for ship-to-ship transfer of cargo. It should also address the need for co-coordinating this activity with the Coastal state, as such operation may be subject to the coastal state’s jurisdiction. Response to oil spills Shipboard Oil Pollution Emergency Plan

  24. Response to oil spills HELMEPA Ship’s Manual

  25. Response to oil spills Common spill response methods Oil Booms

  26. Response to oil spills Common spill response methods Skimmers

  27. Response to oil spills Common spill response methods Chemical dispersants

  28. Response to spills by other harmful substances • Transport of Dangerous Cargoes – Marine Pollutants

  29. Response to spills by other harmful substances • Transport of HNS substances

  30. Response to spills by other harmful substances • Transport of chemicals in packaged form • Mont Blanc Accident, 1917

  31. Response to spills by other harmful substances Hazards from the carriage of bulk chemicals

  32. Response to spills by other harmful substances NLS Categorization • X Major Hazard (13%, 70 substances) • Y Hazard (65%, > 320 substances) • Z Minor Hazard (22%, > 110 substances) • OS No hazards

  33. Response to spills by other harmful substances Permissible discharges of tank washings and dirty ballast

  34. Response to spills by other harmful substances Properties assessed in classifying an NLS cargo

  35. Response to spills by other harmful substances Behavior of spills

  36. Response to spills by other harmful substances Behavior Impacts Response

  37. SMPEP vs SOPEP SMPEP shall include all the casualties referred in SOPEP plus: spills by noxious liquid substances, and response practices in relation to: dangerous reactions of cargoes carried on the vessel, dangerous cargo releases, loss of tank environmental control, and cargo contamination that might lead to a hazardous condition Response to spills by other harmful substances

  38. Response to spills by other harmful substances Accidental release of a rapidly evaporating and flammable cargo

  39. Thank you for your attention! Questions

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