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The Private Water Supplies (Amendment) Regulations (Northern Ireland) 2015

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Amendment of Schedule 3 Monitoring

This section has no associated Explanatory Memorandum

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
ParameterCircumstances
AluminiumWhen used as flocculant or where the water originates from, or is influenced by, surface waters
AmmoniumIn all supplies
Clostridium perfringens (including spores)Where the water originates from, or is influenced by, surface waters
Coliform bacteriaIn all supplies
ColourIn all supplies
ConductivityIn all supplies
Escherichia coli (E. coli)In all supplies
Hydrogen ionIn all supplies
IDWhere treatment to reduce the level of radionuclides in water intended for human consumption has been taken
IronWhen used as flocculant or where the water originates from, or is influenced by, surface waters
ManganeseWhere the water originates from, or is influenced by, surface waters
NitrateWhen chloramination is practised
NitriteWhen chloramination is practised
OdourIn all supplies
RadonWhere treatment to reduce the level of radionuclides in water intended for human consumption has been taken
TasteIn all supplies
TritiumWhere treatment to reduce the level of radionuclides in water intended for human consumption has been taken
TurbidityIn all supplies
Disinfectant residualWhen 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/daySampling frequency per year
≤101
> 10 ≤ 1002
> 100 ≤ 1,0004
> 1,000 ≤ 2,00010
> 2,000 ≤ 3,00013
> 3,000 ≤ 4,00016
> 4,000 ≤ 5,00019
> 5,000 ≤ 6,00022
> 6,000 ≤ 7,00025
> 7,000 ≤ 8,00028
> 8,000 ≤ 9,00031
> 9,000 ≤ 10,00034
> 10,0004 + 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 /daySampling frequency per year
≤ 10001
> 1000 ≤ 10,0001 + 1 for each 3,300 m3/day of the total volume (rounding up to the nearest multiple of 3,300 m3/day)
> 10,000 ≤ 100,0003 + 1 for each 10,000 m3/day of the total volume (rounding up to the nearest multiple of 10,000 m3/day)
> 100,00010 + 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.

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