| (1) | (2) |
|---|---|
| Parameter | Method |
| Clostridium perfringens (including spores) | Membrane filtration followed by anaerobic incubation of the membrane on m-CP agar* at 44 ± 1°C for 21 ± 3 hours. Count opaque yellow colonies that turn pink or red after exposure to ammonium hydroxide vapours for 20 to 30 seconds. |
| Coliform bacteria | ISO 9308-1 |
| Colony count 22°C-enumeration of culturable microorganisms | PrEN ISO 6222 |
| Colony count 37°C-enumeration of culturable microoganisms | prEN ISO 6222 |
| Enterococci | ISO 7899-2 |
| Escherichia coli (E. coli) | ISO 9308-1 |
| *The composition of m-CP agar is: | |
| Basal medium | |
| Tryptose | 30.0g |
| Yeast extract | 20.0g |
| Sucrose | 5.0g |
| L-cysteine hydrochloride | 1.0g |
| MgSO4.7H2O | 0.1g |
| Bromocresol purple | 40.0mg |
| Agar | 15.0g |
| Water | 1,000.0ml |
| Dissolve the ingredients of the basal medium, adjust pH to 7.6 and autoclave at 121°C for 15 minutes. Allow the medium to cool and add: | |
| D-cycloserine | 400.0mg |
| Polymyxine-B sulphate | 25.0mg |
| Indoxyl-[beta]-D-glucoside | 60.0mg |
| to be dissolved in 8ml sterile water before addition | |
| Filter-sterilised 0.5% phenolphthalein diphosphate solution | 20.0ml |
| Filter-sterilised 4.5% FeCl3.6H2O | 2.0ml |
| (1) | (2) | (3) | (4) |
|---|---|---|---|
| Parameters | Trueness % of prescribed concentration or value or specification | Precision % of prescribed concentration or value or specification | Limit of detection % of prescribed concentration or value or specification |
| Aluminium | 10 | 10 | 10 |
| Ammonium | 10 | 10 | 10 |
| Antimony | 25 | 25 | 25 |
| Arsenic | 10 | 10 | 10 |
| Benzene | 25 | 25 | 25 |
| Benzo(a)pyrene | 25 | 25 | 25 |
| Boron | 10 | 10 | 10 |
| Bromate | 25 | 25 | 25 |
| Cadmium | 10 | 10 | 10 |
| Chloride | 10 | 10 | 10 |
| Chromium | 10 | 10 | 10 |
| Colour | 10 | 10 | 10 |
| Conductivity | 10 | 10 | 10 |
| Copper | 10 | 10 | 10 |
| Cyanide (i) | 10 | 10 | 10 |
| 1,2-dichloroethane | 25 | 25 | 10 |
| Fluoride | 10 | 10 | 10 |
| Iron | 10 | 10 | 10 |
| Lead | 10 | 10 | 10 |
| Manganese | 10 | 10 | 10 |
| Mercury | 20 | 10 | 20 |
| Nickel | 10 | 10 | 10 |
| Nitrate | 10 | 10 | 10 |
| Nitrite | 10 | 10 | 10 |
| Pesticides and related products (ii) | 25 | 25 | 25 |
| Polycyclic aromatic hydrocarbons (iii) | 25 | 25 | 25 |
| Selenium | 10 | 10 | 10 |
| Sodium | 10 | 10 | 10 |
| Sulphate | 10 | 10 | 10 |
| Tetrachloroethene (iv) | 25 | 25 | 10 |
| Tetrachloromethane | 20 | 20 | 20 |
| Trichloroethene (iv) | 25 | 25 | 10 |
| Trihalomethanes: | 25 | 25 | 10 |
| Total (iii) | |||
| Turbidity (v) | 10 | 10 | 10 |
| Turbidity (vi) | 25 | 25 | 25 |
Notes:
The method of analysis should determine total cyanide in all forms.
The performance characteristics apply to each individual pesticide and will depend on the pesticide concerned.
The performance characteristics apply to the individual substances specified at 25% of the parametric value in Part I of Table B in Schedule 1.
The performance characteristics apply to the individual substances specified at 50% of the parametric value in Part I of Table B in Schedule 1.
The performance characteristics apply to the prescribed value of 4 NTU.
The performance characteristics apply to the specification of 1 NTU for water leaving treatment works.