Singapore legislation
Regulation 10
Regulation 10
Maximum concentrations of certain substances
Subregulation 1
Subject to any permission granted under regulation 11A, a person must not discharge or cause to be discharged into a public sewerage system any trade effluent which —
contains any substance listed in the Second or Third Schedule in a concentration greater than that specified therein for the substance;
has a 5‑day Biochemical Oxygen Demand at 20° Celsius (referred to in this regulation and regulation 11 as BOD) greater than 400 milligrams per litre of the trade effluent;
has a Chemical Oxygen Demand (referred to in this regulation and regulation 11 as COD) greater than 600 milligrams per litre of the trade effluent;
has Total Suspended Solids (referred to in this regulation and regulation 11 as TSS) greater than 400 milligrams per litre of the trade effluent; or
has Grease and Oil, which is not hydrocarbon in nature, greater than 300 milligrams per litre of the trade effluent.
Subregulation 2
The Board may stipulate —
the maximum volume and quantity of a substance which may be discharged into a public sewerage system under this regulation; and
the maximum rate at which the substance may be so discharged.
Subregulation 3
Where the Board stipulates the maximum volume and quantity of a substance which may be discharged into a public sewerage system under this regulation and the maximum rate at which the substance may be so discharged, no person who has been informed by the Board by notice in writing of the volume, quantity or rate may discharge the substance into a public sewerage system in a volume or quantity or at a rate in excess of that so stipulated.