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The Private Water Supplies (Wales) Regulations 2010 (revoked)
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Version Superseded: 20/11/2017
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Add to the medium—
| Filter-sterilised 0.5% phenolphthalein diphosphate solution | 20.0ml |
| Filter-sterilised 4.5% FeCl3.6H2O | 2.0ml |
Table 2
Prescribed performance characteristics for methods of analysis
Notes: | |||
1 The method of analysis should determine total cyanide in all forms. | |||
2 The performance characteristics apply to each individual pesticide and will depend on the pesticide concerned. | |||
3 The performance characteristics apply to the individual substances specified at 25% of the parametric value in Part I of Table B in Schedule 1. | |||
4 The performance characteristics apply to the individual substances specified at 50% of the parametric value in Part I of Table B in Schedule 1. | |||
5 The performance characteristics apply to the prescribed value of 4 NTU. | |||
6 The performance characteristics apply to the specification of 1 NTU for surface waters or ground waters influenced by surface water. | |||
| 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 1 | 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 2 | 25 | 25 | 25 |
| Polycyclic aromatic hydrocarbons 3 | 25 | 25 | 25 |
| Selenium | 10 | 10 | 10 |
| Sodium | 10 | 10 | 10 |
| Sulphate | 10 | 10 | 10 |
| Tetrachloroethene 4 | 25 | 25 | 10 |
| Tetrachloromethane | 20 | 20 | 20 |
| Trichloroethene 4 | 25 | 25 | 10 |
| Trihalomethanes: | |||
| Total 3 | 25 | 25 | 10 |
| Turbidity 5 | 10 | 10 | 10 |
| Turbidity 6 | 25 | 25 | 25 |
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