Q-2, r. 22 - Regulation respecting waste water disposal systems for isolated dwellings

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16.6. Discharge standards: The effluent of a secondary treatment system may not contain a SS concentration that exceeds 30 mg/litre or a CBO5 concentration that exceeds 25 mg/litre. Either standard is exceeded where the concentration for the same parameter in 2 samples collected in a 60-day period exceeds the amount indicated above for that parameter.
O.C. 786-2000, s. 21.