- Y Diweddaraf sydd Ar Gael (Diwygiedig)
- Gwreiddiol (a wnaed Fel)
Dyma’r fersiwn wreiddiol (fel y’i gwnaed yn wreiddiol).
Regulation 18
(1) Parameter | (2) Method |
---|---|
Clostridium perfringens (including spores) | EN ISO 14189 |
Coliform bacteria | EN ISO 9308-1 or EN ISO 9308-2 |
Colony count 22°C-enumeration of culturable microorganisms | ENISO 6222 |
Colony count 36°C-enumeration of culturable microoganisms | EN ISO 6222 |
Enterococci | EN ISO 7899-2 |
Escherichia coli (E. coli) | EN ISO 9308-1 or EN ISO 9308-2 |
Pseudomonas aeruginosa | EN ISO 16266 |
(1) Parameter(1) | (2) Uncertainty of measurement (% of parametric value, except pH)(2) |
---|---|
(1) Acrylamide, epichlorohydrin and vinyl chloride to be controlled by product specification. | |
(2) Uncertainty of measurement is a non-negative parameter characterising the dispersion of the quantity values being attributed to a measurand, based on the information used. The performance criterion for measurement uncertainty (k = 2) is the percentage of the parametric value stated in the table or better. Measurement uncertainty must be estimated at the level of the parametric value, unless otherwise specified. | |
(3) If the value of uncertainty of measurement cannot be met, the best available technique should be selected (up to 60%). | |
(4) The method determines total cyanide in all forms. | |
(5) Values for trueness, precision and uncertainty of measurement are expressed in pH units. | |
(6) Reference method EN ISO 8467. | |
(7) The performance characteristics for individual pesticides are given as an indication. Values for the uncertainty of measurement as low as 30 % can be achieved for several pesticides, higher values up to 80 % may be allowed for a number of pesticides | |
(8) The performance characteristics apply to individual substances, specified at 25% of the parametric value in Table B in Schedule 1. | |
(9) The performance characteristics apply to individual substances, specified at 50% of the parametric value in Table B in Schedule 1. | |
(10) The uncertainty of measurement should be estimated at the level of 3 mg/l of the total organic carbon. CEN 1484 Guidelines for the determination of total organic carbon and dissolved organic carbon must be used. | |
(11) The uncertainty of measurement must be estimated at the level of 1.0 NTU (nephelometric turbidity units) in accordance with EN ISO 7027. | |
Aluminium | 25 |
Ammonium | 40 |
Antimony | 40 |
Arsenic | 30 |
Benzo(a)pyrene(3) | 50 |
Benzene | 40 |
Boron | 25 |
Bromate | 40 |
Cadmium | 25 |
Chloride | 15 |
Chromium | 30 |
Conductivity | 20 |
Copper | 25 |
Cyanide(4) | 30 |
1,2-dichloroethane | 40 |
Fluoride | 20 |
Hydrogen ion concentration pH (expressed in pH units)(5) | 0.2 |
Iron | 30 |
Lead | 25 |
Manganese | 30 |
Mercury | 30 |
Nickel | 25 |
Nitrate | 15 |
Nitrite | 20 |
Oxidisability(6) | 50 |
Pesticides(7) | 30 |
Polycyclic aromatic hydrocarbons(8) | 50 |
Selenium | 40 |
Sodium | 15 |
Sulphate | 15 |
Tetrachloroethene(9) | 30 |
Tetrachloromethane | 30 |
Trichloroethene(9) | 40 |
Trihalomethanes: total(8) | 40 |
Total organic carbon(10) | 30 |
Turbidity(11) | 30 |
(1) Parameter(1) | (2) Trueness(2) | (3) Precision(3) | (4) Limit of detection(4) |
---|---|---|---|
(1) Acrylamide, epichlorohydrin and vinyl chloride to be controlled by product specification. | |||
(2) Trueness is a measure of systematic error, i.e. the difference between the mean value of the large number of repeated measurements and the true value. Further specifications are those set out in ISO 5725. | |||
(3) Precision is a measure of random error and is usually expressed as the standard deviation (within and between batches) of the spread of results from the mean. Acceptable precision is twice the relative standard deviation. This term is further specified in ISO 5725. | |||
(4) Limit of detection is either three times the standard deviation within a batch of a natural sample containing a low concentration of the parameter; or five times the standard deviation of a blank sample (within a batch). | |||
(5) The method determines total cyanide in all forms. | |||
(6) Values for trueness, precision and uncertainty of measurement are expressed in pH units. | |||
(7) Reference method EN ISO 8467 1995. | |||
(8) The performance characteristics for individual pesticides are given as an indication. Values for the uncertainty of measurement as low as 30% can be achieved for several pesticides, higher values up to 80% may be allowed for a number of pesticides | |||
(9) The performance characteristics apply to individual substances, specified at 25% of the parametric value in Table B in Schedule 1. | |||
(10) The performance characteristics apply to individual substances, specified at 50% of the parametric value in Table B in Schedule 1. | |||
(11) The performance characteristics apply to prescribed value 4 NTU. | |||
(12) The performance characteristics apply to prescribed value 1 NTU for water leaving surface water treatment works. | |||
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(5) | 10 | 10 | 10 |
1,2-dichloroethane | 25 | 25 | 10 |
Fluoride | 10 | 10 | 10 |
Hydrogen ion concentration pH (expressed in pH units)(6) | 0.2 | 0.2 | |
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 |
Oxidisability(7) | 25 | 25 | 25 |
Pesticides(8) | 25 | 25 | 25 |
Polycyclic aromatic hydrocarbons(9) | 25 | 25 | 25 |
Selenium | 10 | 10 | 10 |
Sodium | 10 | 10 | 10 |
Sulphate | 10 | 10 | 10 |
Tetrachloroethene(10) | 25 | 25 | 10 |
Tetrachloromethane | 20 | 20 | 20 |
Trichloroethene(10) | 25 | 25 | 10 |
Trihalomethanes: total(9) | 25 | 25 | 10 |
Turbidity(11) | 10 | 10 | 10 |
Turbidity(12) | 25 | 25 | 25 |
Y Diweddaraf sydd Ar Gael (diwygiedig):Y fersiwn ddiweddaraf sydd ar gael o’r ddeddfwriaeth yn cynnwys newidiadau a wnaed gan ddeddfwriaeth ddilynol ac wedi eu gweithredu gan ein tîm golygyddol. Gellir gweld y newidiadau nad ydym wedi eu gweithredu i’r testun eto yn yr ardal ‘Newidiadau i Ddeddfwriaeth’.
Gwreiddiol (Fel y’i Deddfwyd neu y’i Gwnaed): Mae'r wreiddiol fersiwn y ddeddfwriaeth fel ag yr oedd pan gafodd ei deddfu neu eu gwneud. Ni wnaed unrhyw newidiadau i’r testun.
Explanatory Memorandum sets out a brief statement of the purpose of a Statutory Rule and provides information about its policy objective and policy implications. They aim to make the Statutory Rule accessible to readers who are not legally qualified and accompany any Northern Ireland Statutory Rule or Draft Northern Ireland Statutory Rule laid before the UK Parliament during the suspension of the Northern Ireland Assembly.
Gallwch wneud defnydd o ddogfennau atodol hanfodol a gwybodaeth ar gyfer yr eitem ddeddfwriaeth o’r tab hwn. Yn ddibynnol ar yr eitem ddeddfwriaeth sydd i’w gweld, gallai hyn gynnwys:
Defnyddiwch y ddewislen hon i agor dogfennau hanfodol sy’n cyd-fynd â’r ddeddfwriaeth a gwybodaeth am yr eitem hon o ddeddfwriaeth. Gan ddibynnu ar yr eitem o ddeddfwriaeth sy’n cael ei gweld gall hyn gynnwys:
liciwch ‘Gweld Mwy’ neu ddewis ‘Rhagor o Adnoddau’ am wybodaeth ychwanegol gan gynnwys