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 27 2. Systems were temporarily ventilating with outdoor air for seasonal comfort or energy savings during the test period, including: a. Closable passive crawl space vents that were open during the test but would be closed more than 50% of the year for energy savings, comfort or to prevent frozen pipes, b. Window air conditioners did not have closed outside air dampers during the test period, c. Evaporative cooling systems were operating or not covered during the test period, d. Energy recovery ventilators, heat recovery ventilators or economizer ventilation systems were operating under one or both of the following conditions: — the systemwas not set to the lowest outdoor air ventilation rate that occurs during all seasons. — not all thermostats in areas served by these systems were set to normal occupiable temperatures ; 3. Sub-slab return ducts observed, andminimal air handler activity occurred during the test; and 4. If weather events occurred that were unusually severe for local weather. c) Deviations from protocol Where deviations from this standard were observed that are known or suspected to cause a test to not reflect occupant risk from radon , summary reports shall recommend retesting the affected location(s). Deviations from protocol subject to this requirement include, but are not limited to: 1. observed noncompliance with required conditions, such as closed-building conditions 12 hours prior to, or during the test period; 2. observed deviation from a normal occupiable indoor temperature ; and 3. where non interference controls indicate concerns regarding protocol compliance. d) Radon mitigation system status (if applicable) Where a mitigation systemor efforts tomitigate radon are observed, summary reports shall include: 1. a statement that a mitigation system was observed and whether it appeared to be operating; 2. a statement regarding the condition of any temporary radon mitigation strategies that are not permanent installations; and 3. a statement on the limits of the inspection. It is permitted to provide a statement in the report that the test company offers no findings as to the proper installation and operation of the mitigation system . 8.2.4 Final Summary Reports Where, in spite of insistent efforts, it is beyond the control of person(s) conducting the test to achieve valid tests in all locations required by this standard, the final summary report, and any elaborations in summary report attachments, shall provide a description of efforts for each location where conditions could not be overcome to achieve a valid test.