Amendment of Schedule 3 Monitoring
9. For Schedule 3 Part 1 (Check Monitoring) substitute—
“PART 1Check Monitoring
Sampling
1. Check monitoring means sampling for each parameter listed in Table A in the circumstances listed in that table.
Table A
Check Monitoring
| Parameter | Circumstances |
|---|---|
| Aluminium | When used as flocculant or where the water originates from, or is influenced by, surface waters |
| Ammonium | In all supplies |
| Clostridium perfringens (including spores) | Where the water originates from, or is influenced by, surface waters |
| Coliform bacteria | In all supplies |
| Colour | In all supplies |
| Conductivity | In all supplies |
| Escherichia coli (E. coli) | In all supplies |
| Hydrogen ion | In all supplies |
| ID | Where treatment to reduce the level of radionuclides in water intended for human consumption has been taken |
| Iron | When used as flocculant or where the water originates from, or is influenced by, surface waters |
| Manganese | Where the water originates from, or is influenced by, surface waters |
| Nitrate | When chloramination is practised |
| Nitrite | When chloramination is practised |
| Odour | In all supplies |
| Radon | Where treatment to reduce the level of radionuclides in water intended for human consumption has been taken |
| Taste | In all supplies |
| Tritium | Where treatment to reduce the level of radionuclides in water intended for human consumption has been taken |
| Turbidity | In all supplies |
| Disinfectant residual | When disinfection treatment is practised |
Frequency of sampling
2.—(1) Sampling for non-radioactive substances shall be carried out at frequencies specified in table B of this Schedule and sampling for radioactive substances shall be carried out at frequencies specified in table B1 of this Schedule.
TABLE B
Sampling frequency for check monitoring
| Volume m3/day | Sampling frequency per year |
|---|---|
| ≤10 | 1 |
| > 10 ≤ 100 | 2 |
| > 100 ≤ 1,000 | 4 |
| > 1,000 ≤ 2,000 | 10 |
| > 2,000 ≤ 3,000 | 13 |
| > 3,000 ≤ 4,000 | 16 |
| > 4,000 ≤ 5,000 | 19 |
| > 5,000 ≤ 6,000 | 22 |
| > 6,000 ≤ 7,000 | 25 |
| > 7,000 ≤ 8,000 | 28 |
| > 8,000 ≤ 9,000 | 31 |
| > 9,000 ≤ 10,000 | 34 |
| > 10,000 | 4 + 3 for each 1,000 m3/day of the total volume (rounding up to the nearest multiple of 1,000 m3/day) |
TABLE B1
| Volume m3 /day | Sampling frequency per year |
|---|---|
| ≤ 1000 | 1 |
| > 1000 ≤ 10,000 | 1 + 1 for each 3,300 m3/day of the total volume (rounding up to the nearest multiple of 3,300 m3/day) |
| > 10,000 ≤ 100,000 | 3 + 1 for each 10,000 m3/day of the total volume (rounding up to the nearest multiple of 10,000 m3/day) |
| > 100,000 | 10 + 1 for each 25,000 m3/day of the total volume (rounding up to the nearest multiple of 25,000 m3/day) |
(2) The Department may reduce the frequency of sampling for a parameter within Table B to a frequency not less than half if—
(a)it is of the opinion that the quality of water in the supply is unlikely to deteriorate;
(b)in the case of hydrogen ion the parameter has had a pH value that is not less than 6.5 and not more than 9.5; and
(c)in all other cases, in each of two successive years the results of samples taken for the purposes of monitoring the parameter in question are constant and significantly lower than the concentrations or values laid down in Schedule 1.
(3) The Department may set a higher frequency for any parameter if it considers it appropriate taking into account the findings of any risk assessment, and in addition may monitor anything else identified in the risk assessment.”