- Latest available (Revised) - English
- Latest available (Revised) - Welsh
- Original (As made) - English
- Original (As made) - Welsh
Rheoliadau Cyflenwadau Dŵr Preifat (Cymru) 2010
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RHAN 2Dulliau dadansoddi
Tabl 1
Dulliau dadansoddi rhagnodedig
| Paramedr | Dull | ||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
* Defnyddiwch y dull canlynol i wneud agar m-CP: Gwnewch gyfrwng gwaelodol sy'n cynnwys—
Hydoddwch gynhwysion y cyfrwng gwaelodol, addaswch y pH i 7.6 ac awtoclafiwch ar 121°C am 15 munud. Gadewch i'r cyfrwng oeri. Hydoddwch—
mewn 8ml o ddŵr di-haint ac ychwanegwch ef at y cyfrwng. Ychwanegwch at y cyfrwng—
| |||||||||||||||||||||||||||
| Clostridium perfringens (gan gynnwys sborau) | Hidlo drwy bilen ac yna deor y bilen yn anerobig ar agar m-CP* ar 44 ± 1°C am 21 ± 3 awr. Cyfrifwch y cytrefi melyn di-draidd sy'n troi'n binc neu'n goch ar ôl eu datguddio i anweddau amoniwm hydrocsid am rhwng 20 a 30 eiliad. | ||||||||||||||||||||||||||
| Bacteria colifform | BS-EN ISO 9308-1 | ||||||||||||||||||||||||||
| Cyfrifiad cytrefi 22°C — rhestru niferoedd o ficro-organebau meithrinadwy | BS-EN ISO 6222 | ||||||||||||||||||||||||||
| Cyfrifiad cytrefi 37°C — rhestru niferoedd o ficro-organebau meithrinadwy | BS-EN ISO 6222 | ||||||||||||||||||||||||||
| Enterococi BS-EN ISO 7899-2 | |||||||||||||||||||||||||||
| Escherichia coli (E. coli) | BS-EN ISO 9308-1 | ||||||||||||||||||||||||||
| Pseudomonas aeruginosa | BS-EN-ISO 12780 | ||||||||||||||||||||||||||
Tabl 2
Nodweddion perfformiad rhagnodedig ar gyfer dulliau dadansoddi
| Paramedrau | Gwiredd fel % o'r crynodiad neu werth neu fanyleb a ragnodir | Trachywiredd fel % o'r crynodiad neu werth neu fanyleb a ragnodir | Terfyn canfod fel % o'r crynodiad neu werth neu fanyleb a ragnodir |
|---|---|---|---|
| Nodiadau: | |||
(i) Dylai'r dull dadansoddi benderfynu cyfanswm y cyanid ym mhob ffurf. | |||
(ii) Mae'r nodweddion perfformiad yn gymwys i bob plaleiddiad unigol a byddant yn dibynnu ar y plaleiddiad dan sylw. | |||
(iii) Mae'r nodweddion perfformiad yn gymwys i'r sylweddau unigol a bennir yn ôl 25% o'r gwerth paramedrig yn Rhan 1 o Dabl B yn Atodlen 1. | |||
(iv) Mae'r nodweddion perfformiad yn gymwys i'r sylweddau unigol a bennir yn ôl 50% o'r gwerth paramedrig yn Rhan 1 o Dabl B yn Atodlen 1. | |||
(v) Mae'r nodweddion perfformiad yn gymwys i'r gwerth rhagnodedig o 4 NTU. | |||
(vi) Mae'r nodweddion perfformiad yn gymwys i'r fanyleb o 1 NTU ar gyfer dŵr wyneb neu ddŵr daear y dylanwedir arno gan ddŵr wyneb. | |||
| Alwminiwm | 10 | 10 | 10 |
| Amoniwm | 10 | 10 | 10 |
| Antimoni | 25 | 25 | 25 |
| Arsenig | 10 | 10 | 10 |
| Bensen | 25 | 25 | 25 |
| Benso(a)pyren | 25 | 25 | 25 |
| Boron | 10 | 10 | 10 |
| Bromad | 25 | 25 | 25 |
| Cadmiwm | 10 | 10 | 10 |
| Clorid | 10 | 10 | 10 |
| Cromiwm | 10 | 10 | 10 |
| Lliw | 10 | 10 | 10 |
| Dargludedd | 10 | 10 | 10 |
| Copr | 10 | 10 | 10 |
| Cyanid (i) | 10 | 10 | 10 |
| 1,2-dicloroethan | 25 | 25 | 10 |
| Fflworid | 10 | 10 | 10 |
| Haearn | 10 | 10 | 10 |
| Plwm | 10 | 10 | 10 |
| Manganîs | 10 | 10 | 10 |
| Mercwri | 20 | 10 | 20 |
| Nicel | 10 | 10 | 10 |
| Nitrad | 10 | 10 | 10 |
| Nitraid | 10 | 10 | 10 |
| Plaleiddiaid a chynhyrchion perthynol (ii) | 25 | 25 | 25 |
| Hydrocarbonau aromatig polysyclig (iii) | 25 | 25 | 25 |
| Seleniwm | 10 | 10 | 10 |
| Sodiwm | 10 | 10 | 10 |
| Sylffad | 10 | 10 | 10 |
| Tetracloroethen (iv) | 25 | 25 | 10 |
| Tetracloromethan | 20 | 20 | 20 |
| Tricloroethen (iv) | 25 | 25 | 10 |
| Trihalomethanau: | |||
| 25 | 25 | 10 |
| Cymylogrwydd (v) | 10 | 10 | 10 |
| Cymylogrwydd (vi) | 25 | 25 | 25 |
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