RMS-LB 2018 with 12/20 Revisions

Note—12/20 revision (The remainder of this document does NOT contain changed requirements) ANSI/AARST RMS-LB 2018 (with 1220 revisions) Radon Mitigation Standards for Schools and Large Buildings 41 9.0 POST-MITIGATION 9.1 Post-Mitigation Functional Evaluation 9.1.1 For ASD systems In conjunction with activating an active soil depressurization (ASD ) system, the suction in system piping shall be measured and recorded along with at least one pressure field extension (PFE) measurement that is conducted under closed-building and normal operating conditions. Informative advisory —It is recommended that both measurements be made under conditions that reflect normal building operation when significantly occupied and include consideration for worst case conditions. 9.1.1.1 The PFE measurement shall be made and recorded at a point distant from each suction point(s) to verify intended design using a differential pressure gauge capable of reading to 1/1000 inch water column (.25 Pa). Informative advisory —It is recommended that the test port(s) be closed in a non-permanent fashion to facilitate future needs (e.g., diagnosing a system when radon tests do not indicate success in achieving mitigation goals). 9.1.2 For non-ASD systems Measurements of airflow volume, pressure and other system parameters that are applicable to the method chosen shall be recorded after installation. 9.1.3 Inspection for compliance Note— Section 8.5 contains requirements to inspect the system after installation. 9.2 Initial Radon Test After Mitigation To provide an initial measure of system effectiveness, a short-term radon measurement shall be conducted no sooner than 24 hours after a mitigation system is operational and within 30 days after installation of the system(s). 9.2.1 Qualified radon measurement professionals A Qualified Radon Measurement Professional is an individual who has demonstrated a minimum degree of appropriate technical knowledge and skills specific to radon measurement in schools and large buildings: a) as established in certification requirements of the National Radon Proficiency Program (NRPP) or the National Radon Safety Board (NRSB), and; b) as required by statute, state licensure or certification program, where applicable. 9.2.2 Contractor obligations Contractor obligations to ensure post- mitigation testing is conducted have been satisfied once post- mitigation test results are accepted by the client as satisfactory evidence for the initial status of system effectiveness. 9.2.2.1 For the purposes of this initial post- mitigation test, contractor obligations are satisfied regardless of whether this testing is conducted by: a. an independent, Qualified Measurement Professional; or b. the contractor who installed the mitigation system(s), if also a Qualified Measurement Professional (and if allowed by local statutes or code). To avoid any appearance of conflict of interest, the contractor shall recommend to the client that post- mitigation testing be conducted by an independent Qualified Measurement Professional; or c. the client when the dwelling is an individually owned and occupied dwelling (if allowed by local statutes or code). 9.2.3 Test devices Radon test devices employed shall be listed as approved by either the National Radon Proficiency Program (NRPP) or the National Radon Safety Board (NRSB), or as required by the state where the measurement is being performed. 9.2.4 Test protocols All testing shall be conducted in accordance with the most current version of ANSI/AARST MALB “Protocol for Conducting Measurements of Radon and Radon Decay Products In Schools and Large Buildings”; in accordance with Section 9.2.2.1 ; and, in accordance with any state protocols and requirements, where applicable.