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(a)
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allow the possibility of decreasing the monitoring frequency of a parameter or of removing a parameter from the list of parameters to be monitored, except for the core parameters referred to in point 1 of Part B of Annex II, if the competent authority is satisfied that to do so would not compromise the quality of water intended for human consumption:
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(i)
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on the basis of the occurrence of a parameter in raw water, in accordance with the risk assessment of the catchment areas for abstraction points as set out in Article 8(1) and (2);
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(ii)
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when a parameter can only occur as a result of the use of a certain treatment technique or disinfection method, and that technique or method is not used by the water supplier; or
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(iii)
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on the basis of the specifications set out in Part C of Annex II;
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