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However, the use of active substances risks that the ballast water is still toxic at the time of discharge into the environment and that organisms in the receiving water may suffer unacceptable harm.
A cautious approach therefore needs to be taken by developers of such ballast water management systems and thorough toxicity testing is needed to determine if an active substance can be used and under which conditions the potential of harming the receiving environment or human health is acceptably low.
Today, many different radioactive elements have been used, but the most famous absolute dating method is radiocarbon dating, which uses the isotope C.
This isotope, which can be found in organic materials and can be used only to date organic materials, has been incorrectly used by many to make dating assumptions for non-organic material such as stone buildings.
The Procedure for approval of ballast water management systems that make use of active substances (G9) is aimed at ensuring proper application of the BWM Convention and provides a safeguard for the sustainable use of active substances.
The approval of systems that make use of active substances consists of two-tiers – Basic and Final Approval, and involves the evaluation of the physical and chemical hazards to ensure that a ballast water management system does not pose unreasonable risks for environment, human health, property or resources, as follows: The complex interaction between manufacturer, administration submitting the proposal, WG 34, the MEPC Ballast water review group and the MEPC itself is set out in Guideline G9.
This method includes carbon dating and thermoluminescence.Lead agency: International Maritime Organization The International Convention for the Control and Management of Ships’ Ballast Water and Sediments, (BWM Convention) was adopted at IMO on 13 February 2004, in response to the increasing concern of the international community with regard to the transfer of invasive species in ships’ ballast water. The GESAMP – “Ballast Water Working Group on Active Substances”, GESAMP – BWWG, or WG 34, was established in November 2005 to review any proposals submitted to IMO in preparation for the BWM Convention for approval of Ballast Water Management systems (further referred to as treatment systems) that make use of ‘Active Substances’.WG 34 reports to IMO on whether such proposals present unreasonable risk to the environment, human health, property or resources in accordance with the criteria specified in the Procedure for approval of ballast water management systems that make use of Active Substances (G9) adopted by IMO under resolution MEPC.126(53).While there is no proof that the rates were different in the past than they are today, there is also no proof that they were the same.Thus radioactive dating relies purely on assumptions.