Canada and Norway submitted a paper to the I ntersessional meeting of the Working Group on Reduction of GHG Emissions from Ships in August (ISWG-GHGg) calling for changes to regulation 15 of MARPOL Annex Ⅵ for oil and chemical tankers that carry volatile cargo. As well as having GHG potential, these emissions can be harmful to human health and contribute to the formation of tropospheric ozone, a component of smog. The submission is based on a report by DNV that found that approximately 70 of VOC emissions are generated during cargo loading. Around 20-30 are generated during laden voyages. Currently Marpol Annex Ⅵ Regulation 15 regulates the control of specific VOC emissions for oil tankers and at ports and terminals. (Methane is excluded from the definition of VOC.) Where required, both the shipboard and shore arrangements are to be in accordance with MSC/Circ.585 "Standards for vapour emission control systems". A second aspect of the regulation, regulation 15.6, requires that all tankers carrying crude oil have an approved and effectively implemented ship specific VOC Management Plan.
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