Regulation 15(2)
The standards set out below are the standards for the acceptance of liquid trade waste for placement in sewerage infrastructure.1. Local Acceptance Criteria
Parameter
Standard for acceptance
1.
Colour
Not noticeable at 100 dilutions
2.
Biochemical Oxygen Demand (BOD 5 )
600 mg/L
3.
Chemical Oxygen Demand (COD)
1 500 mg/L
4.
Total Organic Carbon (TOC)
1 200 mg/L
5.
Total Dissolved Solids (TDS)
10 000 mg/L
6.
Suspended Solids (SS)
600 mg/L
Note 2These standards may be varied under regulation 15(3) .
2. General Acceptance Criteria
Parameter
Standard for acceptance
1.
Temperature
Less than 38ºC
2.
PH
6-10
3.
Gross Solids
Non-faecal gross solids are to have a maximum linear dimension of less than 20 millimetres and a quiescent settling velocity of less than 3 metres per hour
4.
Grease and Oil (Total)
200 mg/L
5.
Beach Grease
100 mg/L
6.
Methylene Blue Active Substances (MBAS)
500 mg/L
7.
Ammonia (plus Ammoniacal ion measured as N)
100 mg/L
8.
Kjeldahl Nitrogen
150 mg/L
9.
Total Phosphorous (as P)
50 mg/L
10.
Sulphate (measured as SO 4 )
1 500 mg/L
11.
Sulphite (measured as SO 2 )
15 mg/L
12.
Chlorine (measured as Cl 2 )
10 mg/L
13.
Aluminium
100 mg/L
14.
Iron
100 mg/L
15.
Boron (as B)
100 mg/L
16.
Bromine (as Br 2 )
10 mg/L
17.
Fluoride (as F - )
30 mg/L
18.
Cyanide-weak Acid Dissociable (as CN - )
5 mg/L
19.
Sulphide-Total (as S 2- )
5 mg/L
3. Acceptance Criteria for Metals
Parameter
Standard for acceptance
Concentration (mg/L)
Mass load (g/day)
1.
Arsenic (As)
5
15
2.
Cadmium (Cd)
2
6
3.
Chromium (Cr)
10
30
4.
Cobalt (Co)
10
30
5.
Copper (Cu)
10
30
6.
Lead (Pb)
10
30
7.
Manganese (Mn)
10
30
8.
Mercury (Hg)
0.05
0.15
9.
Nickel (Ni)
10
30
10.
Selenium (Se)
5
15
11.
Silver (Ag)
5
15
12.
Tin (Sn)
10
30
13.
Zinc (Zn)
10
30
Note 5The concentration or the mass load may be used. However, if the mass load is exceeded, only the concentration method may be used.
4. Acceptance Criteria for Organic Compounds
Parameter
Standard for acceptance
1.
Formaldehyde (as HCHO)
50 mg/L
2.
Phenolic Compounds (as Phenols)
100 mg/L
3.
Pentachlorophenol
5 mg/L
4.
Petroleum Hydrocarbons
30 mg/L
5.
Halogenated Aliphatic Compounds
5 mg/L
6.
Halogenated Aromatic Hydrocarbons (HAHs)
(a) Polychlorinated Biphenyls (PCBs)
0.002 mg/L
(b) Polybrominated Biphenyls (PBBs)
0.002 mg/L
7.
Polynuclear Aromatic Hydrocarbons (PAHs)
5 mg/L
8.
Pesticides (General), (Including insecticides, herbicides, fungicides)
1 mg/L
9.
Organophosphate Pesticides
0.1 mg/L
10.
Organochlorine Pesticides
(a) Aldrin
0.001 mg/L
(b) Chlordane
0.006 mg/L
(c) DDT
0.003 mg/L
(d) Dieldrin
0.001 mg/L
(e) Heptachlor
0.003 mg/L
(f) Lindane
0.100 mg/L