6.2 Evaluation of the treated ballast water (Procedure (G9), paragraph 5.2)
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Statutory Documents - IMO Publications and Documents - Circulars - Ballast Water Management - BWM.2/Circular.37 – International Convention for the Control and Management of Ships' Ballast Water and Sediments, 2004 – (14 June 2012)... - Annex – Information that should be made available in the Applications for Approval in accordance with Paragraph 8 of the Procedure for Approval of BWM Systems that make use of Active Substances (G9) (The Non-Confidential Information to be Submitted to MEPC) - 6 Risk Characterization - 6.2 Evaluation of the treated ballast water (Procedure (G9), paragraph 5.2)

6.2 Evaluation of the treated ballast water (Procedure (G9), paragraph 5.2)

 The test conditions should be described in detail (organisms tested, salinities, duration of the test, temperature, organism density, sediment load, etc.). A presentation of the results in tables is desirable. The results should be discussed. In a first step, a conservative approach with no dilution should be discussed; in a second step realistic dilution scenarios (dilution factor according to the GESAMP-BWWG Methodology) should be used. The rationale for taking a conservative approach is that there could be multiple discharges into one location (even though this is not necessarily the case).

 The test results to be provided should include all endpoints as appropriate based on the experimental design, e.g. acute 24-hour, 48-hour, 72-hour, and 96-hour Lethal Concentration at which x% of the test organisms die (LCx), No Observed Adverse Effect Concentrations (NOAECs), chronic No Observed Effect Concentration (NOEC) and/or Effect Concentration at which x% of test organisms show effect (ECx)

Parent topic: 6 Risk Characterization

6.2.3 Determination of holding time

 Based on the efficacy, the decay rates and the ecotoxicity tests with treated ballast water the holding time should be determined. It is important to note the range of water temperatures, salinity and other relevant variables at which this holding time is valid.

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