89. The wastewater produced by any activity referred to in section 88 must, at all times, have(1) a pH between 6 and 9.5;
(2) a suspended matter concentration below or equal to 50 mg/l;
(3) a phenolic substances (4AAP) concentration below or equal to 0.15 mg/l;
(4) a petroleum hydrocarbons concentration (C10-C50) below or equal to 2 mg/l;
(5) a 5-day carbonaceous biochemical oxygen demand (BOD5) below or equal to 50 mg/l.