5. The operator of a medium combustion plant shall keep the following:
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(a)
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the permit or the proof of registration by the competent authority and, if relevant, its updated version and related information;
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(b)
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the monitoring results and information referred to in paragraphs 3 and 4;
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(c)
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where applicable, a record of operating hours as referred to in Article 6(3) and in Article 6(8);
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(d)
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a record of the type and quantities of fuels used in the plant and of any malfunctions or breakdown of secondary abatement equipment;
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(e)
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a record of the events of non-compliance and the measures taken, as referred to in paragraph 7.
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The data and information referred to in points (b) to (e) of the first subparagraph shall be kept for a period of at least six years.