B-1.1, r. 3 - Safety Code

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418. Where the analysis result makes it impossible to quantify the Legionella pneumophila concentration by reason of the presence of an interfering flora, the owner of the water cooling tower facility must
(1)  identify the causes of the presence of interfering flora;
(2)  apply corrective measures; and
(3)  verify the effectiveness of the corrective measures.
O.C. 454-2014, s. 4.