Paragraph 4 Frequency of samplingI1

England and Wales

Sampling for Group B parameters must be carried out at the frequencies specified in Table 3.

Table 3

Sampling frequency for Group B parameters

Volume m3/day	Sampling frequency per year
≤10	1
˃ 10 ≤ 3,300	2
˃ 3,300 ≤ 6,600	3
˃ 6,600 ≤ 100,00	4
˃ 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)

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