MALB_2014 with 1-21 Revisions

Conducting Measurements of Radon and Radon ANSI/AARST MALB-2014 with 1/21 Revisions Decay Products in Schools and Large Buildings 29 8.2.6 Elevated Radon Concentrations Guidance in summary reports and otherwise provided where test results meet or exceed the action level shall comply with all applicable requirements in a), b), c), d) and f) of this Section 8.2.6 . a) Specific messages Summary reports shall include equivalent statements for each of the guidance messages shown in Table 8-B where test results meet or exceed the action level . Table 8-B Reporting Elevated Radon Concentrations EQUIVALENT STATEMENTS FOR THESE ADVISORIES SHALL BE INCLUDED IN THE SUMMARY REPORT. “Fix the building. Test results indicate occupants may be exposed to radon concentrations that meet or exceed the action level. Efforts to reduce radon concentrations are not complete until retests provide evidence of effectiveness. The initial retest should be conducted within 30 days after mitigation efforts and system installations. — Post-mitigation clearance testing to confirm each building is fixed requires testing all buildings that demonstrated elevated radon concentrations: 1) in all ground-contact rooms and dwellings, 2) in not less than 10% of non-residential rooms and dwellings on each upper floor. — Should testing indicate concentrations that meet or exceed the action level, conduct evaluations, corrections and further testing until radon concentrations have been mitigated to below the action level.” a) Mitigation Prior to Test Completion When multiple test locations in close proximity to each other indicate elevated concentrations, recommendations to mitigate are permitted prior to completion of all planned test procedures. When reporting that mitigation could be warranted: 1. The recommendations shall include the following or equivalent statement: “Decisions on whether to mitigate are more fully informed once all testing is complete;” and 2. The recommendations shall be disclosed in a manner approved by the client in accordance with a client's pre-established directives on disclosing test data, as described in Section 2.6.3 . b) Clearance Testing Recommendations shall be consistent with clearance testing requirements in Section 7.3 . Testing the effectiveness of mitigation efforts only in locations where elevated radon concentrations have been found shall be reported as performance tests with observance that the testing is not conclusive for fully verifying if the building has been fixed. c) Seasonal Verification It shall be recommended to conduct additional clearance testing within the first year after occupancy, or ownership of property management: 1. Where post- mitigation clearance testing has not been conducted under the predominant normal occupied building operating conditions, for the building or unique sector, in accordance with Section 7.3.2 , and