Michael Green, Technical Manager, Lintec Testing Services, reports that quality levels changed little in the first quarter of the year compared to 2010.
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Paul Livingston, Guardian Marine Testing's operations manager, warns of the risks of hydrogen sulphide and looks at the debate on acceptable limits
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Neil Griffiths of UK Marine Consultants describes some of the most common effects of fuel contamination - and some problems that look like it, but aren't
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