ISO 11665-11:2016 describes radon-222 test methods for soil gas using passive and active in-situ sampling at depth comprised between surface and 2 m. ISO 11665-11:2016 gives general requirements for the sampling techniques, either passive or active and grab or continuous, for in-situ radon-222 activity concentrations measurement in soil gas. The radon-222 activity concentration in the soil can be measured by spot or continuous measurement methods (see ISO 11665-1). In case of spot measurement methods (ISO 11665-6), the soil gas sampling is active only. On the other hand, the continuous methods (ISO 11665-5) are typically associated with passive soil gas sampling. The measurement methods are applicable to all types of soil and are determined according to the end use of the measurement results (phenomenological observation, definition or verification of mitigation techniques, etc.) taking into account the expected level of the radon-222 activity concentration. These measurement methods are applicable to soil gas samples with radon activity concentrations greater than 100 Bq/m3. NOTE This part of ISO 11665 is complementary with ISO 11665-7 for characterization of the radon soil potential.
Tämän julkaisun valmistelusta Suomessa vastaa Metalliteollisuuden Standardisointiyhdistys ry, puh. 09 19 231 (vaihde).
Sisällysluettelo
Foreword
Introduction
1 Scope
2 Normative references
3 Terms, definitions and symbols
3.1 Terms and definitions
3.2 Symbols
4 Principle
5 Equipment
6 Sampling
6.1 Sampling objective
6.2 Sampling characteristics
6.3 Sampling conditions
7 Detection
8 Measurement
8.1 Procedure
8.2 Influence quantities
8.3 Calibration
9 Expression of results
9.1 Radon activity concentration
9.2 Standard uncertainty
9.3 Decision threshold and detection limit
9.4 Limits of the confidence interval
10 Test report
Annex A Values of soil-gas volumes available for extraction (informative)
Annex B Measurement method using an active sampling (normative)
Annex C Measurement method using a passive sampling (normative)
Annex D Examples of soil-gas sampling probes for active sampling (informative)
ISO 10381-7:2005 Soil quality -- Sampling -- Part 7: Guidance on sampling of soil gas
ISO 11665-1:2019 Measurement of radioactivity in the environment -- Air: radon-222 -- Part 1: Origins of radon and its short-lived decay products and associated measurement methods
ISO 11665-5:2012 Measurement of radioactivity in the environment -- Air: radon-222 -- Part 5: Continuous measurement method of the activity concentration
ISO 10381-7:2005 Soil quality -- Sampling -- Part 7: Guidance on sampling of soil gas
ISO 11665-1:2019 Measurement of radioactivity in the environment -- Air: radon-222 -- Part 1: Origins of radon and its short-lived decay products and associated measurement methods
ISO 11665-5:2012 Measurement of radioactivity in the environment -- Air: radon-222 -- Part 5: Continuous measurement method of the activity concentration
ISO 11665-6:2012 Measurement of radioactivity in the environment -- Air: radon-222 -- Part 6: Spot measurement method of the activity concentration
ISO 11929:2010 Determination of the characteristic limits (decision threshold, detection limit and limits of the confidence interval) for measurements of ionizing radiation -- Fundamentals and application