Water and Sewerage Industry (General) Regulations 2019
SCHEDULE 3 - Standards for accSCHEDULE 3 - Standards for acceptance of liquid trade waste
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SCHEDULE 3 - Standards for acc SCHEDULE 3 - Standards for acceptance of liquid trade waste
1. Local Acceptance Criteria
| | Parameter | Standard for acceptance | | 1. | Colour | Not noticeable at 100 dilutions | | 2. | Biochemical Oxygen Demand (BOD5) | 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 2
These 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 SO4) | 1 500 mg/L | | 11. | Sulphite (measured as SO2) | 15 mg/L | | 12. | Chlorine (measured as Cl2) | 10 mg/L | | 13. | Aluminium | 100 mg/L | | 14. | Iron | 100 mg/L | | 15. | Boron (as B) | 100 mg/L | | 16. | Bromine (as Br2) | 10 mg/L | | 17. | Fluoride (as F-) | 30 mg/L | | 18. | Cyanide-weak Acid Dissociable (as CN-) | 5 mg/L | | 19. | Sulphide-Total (as S2-) | 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 5
The 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