§ 133.105 Treatment equivalent to secondary treatment.
This section describes the minimum level of effluent quality attainable by facilities eligible for treatment equivalent to secondary treatment (§ 133.101(g)) in terms of the parameters—BOD5, SS and pH. All requirements for the specified parameters in paragraphs (a), (b) and (c) of this section shall be achieved except as provided for in § 133.103, or paragraphs (d), (e) or (f) of this section.
(a) BOD5. (1) The 30-day average shall not exceed 45 mg/l.
(2) The 7-day average shall not exceed 65 mg/l.
(3) The 30-day average percent removal shall not be less than 65 percent.
(b) SS. Except where SS values have been adjusted in accordance with § 133.103(c):
(1) The 30-day average shall not exceed 45 mg/l.
(2) The 7-day average shall not exceed 65 mg/l.
(3) The 30-day average percent removal shall not be less than 65 percent.