Inventory Hazardous Materials on board tankership Otapan
Tankership Otapan had five fluid compartments in which sulfur was held at a temperature of 145° C, keeping the sulfur liquid. The tanks were insulated with asbestos. Due to the high amount of asbestos the Otapan had to be surveyed thoroughly on health and safety risks before demolition could take place. Kiwa Oesterbaai carried out the survey of asbestos and other hazardous materials.
In 1999 the Otapan was temporarily moored in Amsterdam to carry out major maintenance. In 2001 the vessel was chained by the Dutch government due to the way the asbestos insulation was handled by its Mexican owner. July 2006 the Otapan was towed to the Turkish wharf Simsekler, to be demolished.
The Turkish government however rejected to accept the Otapan in August based on the amount of asbestos not corresponding with the EVOA-notification. The Otapan had to return to the Netherlands and the Ministry of Infrastructure & Environment (former Ministry of VROM) had to bring the Otapan in accordance to their EVOA-notification. The Ministry decided that a thorough survey of the vessel was the first step.
Inventory of Hazardous Materials
December 2006 Kiwa Oesterbaai got the job to carry out an asbestos survey PLUS. The hazardous materials survey was based on the ‘grey list’ ranging from Pcb’s (in materials and substances), Cfk’s, remnants of sulfur, lead in paint, heavy fuel towards asbestos and ceramic fibers.
By approaching a survey of a vessel in this way the Ministry of I&M became an early adopter of the Inventory Hazardous Materials.
During the first tour on board Kiwa Oesterbaai surveyors were amazed. The Mexicans were forced to leave the vessel in 2001 leaving everything behind. A range from personal belongings, Identity Cards to food. Imagine what happens in five years with a steak, cheese, biscuits, beer, etc. Everything was still there and everything was contaminated. The Mexicans had been working on the asbestos insulation around the sulfur tanks with shovels (still present) and the engine room floor was covered with a thick layer of asbestos contaminations and remnants. The situation was indescribable!
The survey report we presented stated that there was in net weight 76 tons of asbestos present (>770 tons of asbestos containing materials). Next to the asbestos containing materials also remnants of sulfur, contaminations with asbestos in the whole vessel, contaminated oil, PCB’s (under the threshold levels) and a bag of pure white asbestos were found.
Plan of action removal of hazardous materials
After the IHM was carried out Kiwa Oesterbaai supported Ministry of I&M by preparing a full Plan of Action to remove the hazardous materials in a safe way. The outcome after the removal had to be that the TS Otapan: 1. corresponded to the initial EVOA-notification (<1.000 kg asbestos in net weight), 2. had to be seaworthy and 3. could be insured.
After asbestos removal company Koole was selected, Kiwa Oesterbaai was appointed as Project Manager on behalf of the Ministry of I&M during the removal project itself.
Due to the deplorable state of the vessel Koole and Kiwa Oesterbaai had to think over each stage and find solutions for heavy oxidation, no electricity, no gangway and due to time restraints over 150 people were working daily onboard so safety was top priority. Ultimately, the whole inside of the vessel was stripped and a large amount of pipes, inner walls and marine equipment were removed. The endresult was according to the above mentioned goals and resulted in a 'ready to recycle certificate'.
New approach towards hazardous materials
After the project was finished the process description, IHM reports and dismantling reports were handed over to COWI (European Committee) and International Maritime Organization. These documents were thoroughly studied and became part of the current opinion and approach towards surveying hazardous materials onboard vessels and preparation for demolishing ships.