(1)  The volumes are calculated as averages taken over a calendar year.   ,
 (2)  As far as possible, the number of samples should be distributed equally in time and location.   ,

volume ≤ 100,1,
100 < volume ≤ 1,000,1,
1,000 < volume ≤ 10,000,1  +1 for each 3,300 m 3 /d and part thereof of the total volume ,
10, 000 < volume ≤ 100,000,3  +1 for each 10,000 m 3 /d and part thereof of the total volume ,
volume > 100,000,10  +1 for each 25,000 m 3 /d and part thereof of the total volume ,
 (1)  Remedial action is deemed to be justified on radiological protection grounds, without further consideration, where radon concentrations exceed 1000 Bq/l.   ,
 (2)  Elevated levels of tritium may indicate the presence of other artificial radionuclides. If the tritium concentration exceeds its parametric value, an analysis of the presence of other artificial radionuclides shall be required.   ,

1.,Radon,Bq/l,100,
2.,Tritium,Bq/l,100,
3.,indicative dose,mSv,0.10,
 (1)  This table includes values for the most common natural and artificial radionuclides; these are precise values, calculated for a dose of 0.1 mSv, an annual intake of 730 litres and using the dose coefficients laid down in Table A of Annex III to Directive 96/29; derived concentrations for other radionuclides can be calculated on the same basis, and values can be updated on the basis of more recent information recognised by the competent authorities in the Member State.   ,
 (2)  This table allows only for the radiological properties of uranium, not for its chemical toxicity.   ,




Natural,U-238,3.0 Bq/l,
,U-234,2.8 Bq/l,
,Ra-226,0.5 Bq/l,
,Ra-228,0.2 Bq/l,
,Pb-210,0.2 Bq/l,
,Po-210,0.1 Bq/l,
Artificial,C-14,240 Bq/l,
,Sr-90,4.9 Bq/l,
,Pu-239/Pu-240,0.6 Bq/l,
,Am-241,0.7 Bq/l,
,Co-60,40 Bq/l,
,Cs-134,7.2 Bq/l,
,Cs-137,11 Bq/l,
,I-131,6.2 Bq/l,
 (1)  The limit of detection is calculated according to the ISO standard 11929: Determination of the characteristic limits (decision threshold, detection limit and limits of the confidence interval) for measurements of ionising radiation – Fundamentals and application, with probabilities of errors of 1st and 2nd kind of 0.05 each.   ,
 (2)  Measurement uncertainties are calculated and reported as complete standard uncertainties, or as expanded standard uncertainties with an expansion factor of 1.96, according to the ISO Guide for the Expression of Uncertainty in Measurement.   ,
 (3)  The limit of detection for tritium and for radon is 10% of its parametric value of 100 Bq/l.   ,
 (4)  The limit of detection for gross alpha activity and gross beta activities are 40% of the screening values of 0.1 and 1.0 Bq/l respectively.   ,
 (5)  This limit of detection applies only to initial screening for ID for a new water source. If initial checking indicates that it is not plausible that Ra-228 exceeds 20% of the derived concentration, the limit of detection may be increased to 0.08 Bq/l for routine Ra-228 nuclide specific measurements, until a subsequent re-check is required.   ,
Limit of detection ,
Tritium,10 Bq/l,,
Radon,10 Bq/l,,
gross alpha activity  gross beta activity ,0.04 Bq/l  0.4 Bq/l ,,
U-238,0.02 Bq/l,,
U-234,0.02 Bq/l,,
Ra-226,0.04 Bq/l,,
Ra-228,0.02 Bq/l,,
Pb-210,0.02 Bq/l,,
Po-210,0.01 Bq/l,,
C-14,20 Bq/l,,
Sr-90,0.4 Bq/l,,
Pu-239/Pu-240,0.04 Bq/l,,
Am-241,0.06 Bq/l,,
Co-60,0.5 Bq/l,,
Cs-134,0.5 Bq/l,,
Cs-137,0.5 Bq/l,,
I-131,0.5 Bq/l,,