212. The purge water discharged by a facility referred to in section 211 must
(1) have a pH between 6 and 9.5;
(2) have a total chlorine residual concentration below or equal to 0.1 mg/l;
(3) have a concentration of suspended matters below or equal to 50 mg/l;
(4) have a total phosphorous concentration below or equal to 1 mg/l.
The maintenance products used by a facility referred to in section 211 must not contain non-oxidizing biocides.