Tag: Marshall Island

Two to three more weeks to clear problematic chemical cargo off vessel in South Africa’s west coast: SAMSA

The NS Qingdao pictured after anchoring at the port of Saldanha on the Atlantic Ocean seaboard a few weeks ago. (Photo: Supplied)

Pretoria: 07 March 2022

It may be another two to three more weeks before troublesome chemical cargo is fully offloaded from the NS Qingdao vessel, currently docked at the port of Saldanha on South Africa west coast, said the South African Maritime Safety Authority late Friday.

This would be about six months since the Marshal Islands registered commercial cargo vessel first set anchor at the country’s ports only to prove a major headache after its cargo of a chemical product reacted to rain water at its first attempt to offload in Durban last October, thereby setting in motion one of the most intense, delicate and time consuming unstable cargo containment exercises ever undertaken by authorities in recent times.

In a statement on Friday afternoon, SAMSA confirmed the vessel was still at anchor in Saldanha Bay for the continued discharge of its waste cargo.

“The vessel will be alongside a berth again on or about Sunday 6th March to continue operations. Operations are proceeding in a safe and well-coordinated manner and good progress has been made,” said SAMSA

The agency added that: “As of the 1st  of March 2022, approximately half of the cargo in cargo hold No.3 had been discharged and disposed at Vissershok High Hazardous Waste Management Site. Wastewater will also be pumped into tanks and sent for disposal at the same waste management site.

“It is anticipated that once the vessel is alongside a berth that it would take approximate 2 to 3 weeks to discharge the remaining waste cargo from the ship and dispose it at Vissershok. The vessel will then be inspected by SAMSA and its classification society to ensure she is safe to continue her voyage to Brazil to discharge remaining cargo onboard.

According to SAMSA, the agency and the Department of Fisheries, Forestry and Environment (DFFE) have reached agreement with the vessel’s owners and P&I Club “to implement a medium to long term environmental monitoring program so that any potential immediate and future impacts can be assessed and mitigated. 

“The P&I Club’s appointed environmental specialists in collaboration with DFFE are continuously monitoring the coast and sea area to determine any threats to the marine environment resulting from the emergency disposal of cargo dumped approximately 250 km offshore. To date, satellite imaging shows no immediate indications of harmful effects to the receiving environment or marine life.

“The Marshall Islands Flag State Investigation team have (also) started their investigation and it is expected to continue over the next few months until the root cause can be established. As part of the co-operation agreement, SAMSA is sharing the available information with the vessels flag. It is expected that the detailed investigation will take an estimated 12 months to complete and that the final report will be shared with SAMSA,”said SAMSA

The agency also expressed its gratitude to all people it has worked closely with to date in managing the vessel.

“SAMSA would like to thank the salvage team onboard, who at great peril to themselves, said SAMSA, “risked everything to successfully bring this emergency situation under control where normal cargo operations could continue. The support from all the person involved in managing this emergency since it started in Durban in October 2021 has been very good, despite the difficult choices that had to be made over the last 6 months by the Authorities.

“The vessel owner continues to co-operate with all authorities and have covered all expenses to date regarding this salvage operation,” said SAMSA.

End

Specialist equipment procured from Europe to evacuate unstable chemical cargo off vessel at St Helena Bay: SAMSA

02 December 2021

The procurement and arrival in South Africa next week of an Inert Gas System and a specialist excavator operator from Europe is expected to relieve pressure and provide enhanced safety to management efforts of transferring an unstable chemical cargo off a constrained vessel currently docked in St Helena Bay.

That is according to the South African Maritime Safety Authority (SAMSA) in a statement in Pretoria on Thursday confirming the docking yet again of the Marshall Island flagged bulk carrier, NS Qingdao, back at St Helena Bay on Tuesday, after days spent off shore due to its unstable chemical cargo.

The saga with the vessel, according to SAMSA, began on 23 October 2021 in Durban where it had docked to offload its chemical cargo, but had to be sent back offshore and rerouted to St Helena Bay after her cargo suffered a chemical reaction, releasing toxic fumes into the atmosphere.

Photo courtesy of MarineTraffic.com

According to SAMSA, redirecting the bulk carrier, now under constant escort, to St Helena Bay on the country’s west coast (Atlantic Ocean) was intended to provide it with protected anchorage, “with the advantage of being in close proximity to the Vissershok waste deposal site where the cargo could be safely discharged and neutralised.”

However, with stormy, wet weather unrelenting, said SAMSA: “Last week (25 Novembe)r the vessel was instructed to sail offshore (again) under tow to help ventilate her No3 cargo holds after the hold was closed due to a change in weather conditions causing an increase in hot spots in the hold and fumes to enter the engine room through the engine room vents.”

In the meantime, said SAMSA that all non-essential personnel were removed as a safety precaution, with only a minimum crew onboard. In the intervening period, plans were made to procure a special Inert Gas System and a specialist excavator operator from Europe. SAMSA said the Inert Gas system would be used to blanket the cargo with an inert gas to prevent any further reactions in the cargo.

However, the discovery of and an announcement in South Africa about a new Covid-19 variant, Omnicron, which almost immediately sent several countries abroad in a tailspin of panic, followed by the closure of borders and bans on international flights to the country, “delayed operations slightly,” said SAMSA, adding that the salvage crew was, however, “optimistic” that the Inert Gas System would arrive in St Helena Bay by Tuesday next week (07 December 2021).

A MarineInsight.com illustration of an inert gas system plant.

MarineInsight.com contextualises the use of an inert gas system as follows: “Inert gas system is the most important integrated system for oil tankers for safe operation of the ship. Inert gas is the gas that contains insufficient oxygen (normally less than 8 %) to suppress the combustion of flammable hydrocarbon gases. The inert gas system spreads the inert gas over the oil cargo hydrocarbon mixture which increases the lower explosion limit LEL (lower concentration at which the vapours can be ignited), simultaneously decreasing the Higher explosion limit HEL (Higher concentration at which vapour explodes).

“When the concentration reaches around 10%, an atmosphere is created inside the tank in which hydrocarbon vapours cannot burn. The concentration of inert gas is kept around 5% as a safety limit.”

Meanwhile, in Pretoria on Thursday, SAMSA further reiterated its earlier assurance that the toxic fumes emitted from the vessel do not pose any danger either to humans or the oceans and coastline environment. Providing specific detail of the bulk carrier’s water sensitive and reactive chemical cargo, SAMSA said: “SAMSA would like to assure the public that this is a controlled event and neither the environment nor any person is at risk at this time and that all safety precautions are taken to prevent the situation from escalating.

Of the cargo’s nature, the agency said: “The bulk cargo consists out of a mixture of Sodium Metabisulphite, Magnesium Nitrate Hexahydrate ,Caustic Calcined Magnesite, Electrode Paste, Monoammonium Phosphate, Ferrous Sulphate Monohydrate, Zinc Sulphate Monohydrate, Dicalcium Phosphate, Sodium Sulphite Anhydrous and Calcium Chloride.”

With the recall of the vessel to dock at St Helena Bay on Tuesday, said SAMSA: “The cargo is being discharged into skips to remove all hot spots in the cargo hold to help neutralise the chemical reaction and gases under the watchful eyes of experienced salvors and chemical experts.

“The first two skips were discharged yesterday morning in the care of SPILLTECH for transportation to Vissershok under controlled conditions. SAMSA would like to reaffirm that there is no immediate risk to any person ashore and that all persons involved in the operation onboard is using all the required personnel protective equipment.”

However, just to be sure, extra measures undertaken since the rerouting of the vessel from Durban to St Helena Bay have included the constant watchful eye of a tug UMKHUSELI that, according to SAMSA “will remain on site to act as a static tow while the vessel is at anchor and ensure that any toxic gases are blown offshore during the operation.

“The ship owner is cooperating with SAMSA, DFFE, TNPA, Salvage Team and local authorities.SAMSA would like to assure the public that this is a controlled event and neither the environment nor any person is at risk at this time and that all safety precautions are taken to prevent the situation from escalating,” said the agency.

End.