Ships garbage management under revised MARPOL ANNEX V

Revised MARPOL Annex V sets new regulatory requirements regarding the disposal of garbage from ships and will come into force on 1 January 2013. The new amendments prohibit the disposal of almost all kinds of garbage at sea with the exemption under specific requirements of food waste, animal carcasses, cargo residues contained in wash water and environmental friendly cleaning agents. As a result of these regulations more and more ships will dispose their ship-generated waste to reception facilities ashore. MARPOL Annex V applies to all ships.

 

Generally, discharge is restricted to food wastes, identified cargo residues, animal carcasses, and identified cleaning agents and additives in washwater which are not harmful to the marine environment. Garbage discharge regulations do not apply when the discharge of garbage from a ship was a necessary action for the purpose of securing the safety of a ship and those on board or saving life at sea. In such cases an entry should be made in the Garbage Record Book, or in the ship’s official log-book for ships of less than 400 gross tonnage.

According to revised MARPOL Annex V shipboard generated garbage is to be grouped into the following categories:

1. Plastics – Garbage that consists of or includes plastic in any form, including synthetic ropes, synthetic fishing nets, plastic garbage bags and incinerator ashes from plastic products. Garbage under this category is prohibited to be discharged at sea.
2. Food wastes –  Spoiled or unspoiled food substances. Food wastes may be discharged at sea under specific circumstances/requirements (refer to the simplified overview of the discharge provisions of the revised MARPOL Annex V developed by IMO).
3. Domestic Wastes – Garbage generated mainly in the accommodation spaces on board the ship (e.g. drinking bottles, papers, cardboard etc). Garbage under this category is prohibited to be discharged at sea.
4. Cooking Oil – Edible oil or animal fat used for the preparation or cooking of food. Garbage under this category is prohibited to be discharged at sea.
5. Incinerator ashes – Ash and clinkers resulting from shipboard incinerators used for the incineration of garbage. Garbage under this category is prohibited to be discharged at sea.
6. Operational wastes – Solid wastes (including slurries) that are collected on board during normal maintenance or operations of a ship, or used for cargo stowage and handling. Operational wastes also includes cleaning agents and additives contained in cargo hold and external wash water that may be harmful to the aquatic environment. Operational wastes does not include grey water, bilge water, or other similar discharges essential to the operation of a ship (boiler/economizer blowdown, gas turbine washwater, machinery wastewater etc). Garbage under this category is prohibited to be discharged at sea.
7. Cargo residues – Remnants of any cargo which remain on the deck or in holds following loading or unloading. This category does not include cargo dust remaining on the deck after sweeping or dust on the external surfaces of the ship. Such garbage may be discharged at sea under specific circumstances/requirements (refer to the simplified overview of the discharge provisions of the revised MARPOL Annex V developed by IMO). It is essential to remember that besides other requirements (e.g. distance from shore) cargo residues in order to be discharged at sea they should not be harmful to the marine environment. Cargo residues which are considered harmful to the marine environment are classified according to the criteria of the United Nations Globally Harmonized System for Classification and Labelling of Chemicals (UN GHS) meeting parameters such as: acute aquatic toxicity category 1, chronic aquatic toxicity category, carcinogenicity, mutagenicity, reproductive toxicity etc
8. Animal Carcasses – Bodies of any animals that are carried on board as cargo and that die or are euthanized during the voyage. Discharge of such wastes permitted at sea under specific circumstances/requirements (refer to the simplified overview of the discharge provisions of the revised MARPOL Annex V developed by IMO).
9. Fishing Gear – Physical device that may be placed on or in the water or on the sea-bed with the intended purpose of capturing  marine or fresh water organisms. Garbage under this category is prohibited to be discharged at sea.

These new categories represent the categories to be used for record purposes in the Garbage Record Book. The superseded MARPOL Annex V defined six categories whereas the revised annex defines nine.

Regarding the cleaning agents mentioned above, a cleaning agent or additive is considered as not harmful for the marine environment when:

1. The Chemical used is not a “harmful substance” in accordance with the criteria in  MARPOL Annex III. This means substances identified by criteria such as Acute (short-term) aquatic hazard, rapidly or non-rapidly degradable substances for which there are adequate chronic toxicity data available and substances for which adequate chronic toxicity data are not available.

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   Mentioned criteria are based on those developed by the United Nations Globally Harmonized System of Classification and Labelling of Chemicals (GHS), as amended.

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2. The Chemical used does not contain any components which are known to be carcinogenic, mutagenic or reprotoxic (CMR). In order to identify such components the GESAMP list can be used.

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To sum up the above, when a ship is discharging chemicals agents from hold wash water to the sea and records such action to the Garbage Record Book then the ship should be able at any time to provide evidence that the cleaning agent or additive used was not harmful to the environment. Such evidence may be provided by the chemicals’ manufacturer under the form of signed and dated statements providing information that the chemical/product meets the criteria for not being harmful to the marine environment. This might form part of a Safety Data Sheet or be a stand-alone document.

Of course the same applies for the cargo that was previously stored within the hold, meaning that hold wash water and cargo residues cannot be discharged if the previous cargo contained within the ship’s hold was not declared as not being harmful to the marine environment according to Section 4.2 of the International Maritime Solid Bulk Cargoes (IMSBC) Code.

In case garbage is mixed with or contaminated by other garbage which have different discharge requirements, the more stringent requirements shall apply. For example, if a vessel is sailing within a special area and has mixed comminuted food waste with food waste that is no comminuted then according to the revised MARPOL Annex V regulations the vessel should not discharge the food waste mixture to the sea.

A simplified overview of the discharge provisions of the revised MARPOL Annex V which will enter into force on 1 January 2013 has been developed by the IMO and is presented here below

1 These substances must not be harmful to the marine environment.
2 Discharge shall only be allowed if: (a) both the port of departure and
the next port of destination are within the special area and the ship will not transit outside the special area between these
ports (regulation 6.1.2.2); and (b) if no adequate reception facilities are available at those ports (regulation 6.1.2.3)