ISO 11665-11:2016描述了氡-222土壤气体测试方法，使用被动和主动现场采样，深度在地表和2m之间。 ISO 11665-11:2016给出了现场测量土壤气体中氡-222活性浓度的被动或主动、抓取或连续采样技术的一般要求。 土壤中的氡-222活性浓度可通过现场或连续测量方法进行测量（见ISO 11665-1）。对于现场测量方法（ISO 11665-6），土壤气体取样仅为有效。 另一方面，连续法（ISO 11665-5）通常与被动土壤气体取样相关。 测量方法适用于所有类型的土壤，并根据测量结果的最终用途（现象学观察、缓解技术的定义或验证等）确定，同时考虑到氡-222活性浓度的预期水平。 这些测量方法适用于氡活度浓度大于100 Bq/m3的土壤气体样品。 注:ISO 11665的这一部分是对ISO 11665-7中氡土壤电位特征的补充。

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.