MS-QA_06-2019 rev5

ANSI/AARST MS-QA 2019 1 Radon Measurement Systems Quality Assurance Scope 1 SCOPE This standard of practice specifies minimum requirements for quality systems designed to quantify the concentration of 222 Rn gas in air by qualified professionals (QPs) and laboratories, whose data are intended to be used to determine the need for, or success of, radon mitigation. This standard is applicable to the wide variety of radon measurement devices used for indoor measurements, primarily in residential environments or buildings not associated with the possession or handling of radioactive materials. 1.1 Limitations 1.1.1 These requirements do not directly apply to the measurements made by non-trained individuals such as homeowners because such measurements fall outside of a cohesive quality system . 1.1.2 These requirements apply to measurements made to determine the need for remedial action and may not be applicable to special studies conducted by researchers or scientists investigating radon phenomena. 1.1.3 Adherence to this standard does not guarantee or supersede compliance with the applicable codes or regulations of any federal, state or local agency with jurisdiction. Such jurisdictions may require additional practices. 1.1.4 This edition of the standard does not address interference from radon isotopes other than 222 Rn, radon decay product measurements, grab sampling methods, or radon dynamics or diagnostic measurements. Although the performance criteria could be adopted for use in a certification program, the specifications for such a program are beyond the scope of this standard. 1.1.5 This standard uses definitions and terms consistent with ANSI/AARST MS-PC including total uncertainty, imprecision and, importantly, minimum detectable concentration . However, the performance criteria limits specified in MS-PC are outside the scope of this standard; this standard provides criteria for quality systems used by QPs working in homes, schools, laboratories and work places. 1.1.6 This standard specifies requirements for quality systems , but not all specific procedures (such as compensating for various possible contributions to background) are specifically addressed. Such procedures are left to the implementation of the qualified professional (QP), as long as (a) the procedures are included in the documentation that is part of the quality system including a Quality Assurance Plan (QAP); (b) the quality control (QC) and other operations described in this standard are routinely conducted and documented; and (c) the other provisions of this standard are met. 1.2 Applicability 1.2.1 Adoption and Use These standards of practice can be adopted as requirements for contractual relationships or adopted as recommendations or requirements of an authority or jurisdiction. 1.2.2 Provisions Which Are Not Mandatory The terms “Note–” and “Informative advisory—” indicate provisions considered helpful or good practice, but which do not contain a mandatory requirement. MS-QA Radon Measurement Systems Quality Assurance