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§ 133.102 Secondary treatment.
The following paragraphs describe the minimum level of effluent quality attainable by secondary treatment in terms of the parameters—BOD5, SS and pH. All requirements for each parameter shall be achieved except as provided for in §§ 133.103 and 133.105.
(a) BOD5.
(1) The 30-day average shall not exceed 30 mg/l.