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 20 d) HVAC setback for non-residential locations Testing records shall include if non-residential rooms are observed to be operating with HVAC setback temperatures when not significantly occupied that are outside of normal occupied temperatures of 65˚and 80˚ F (18˚ - 27˚ C) where this relates to: 1. Compliance with provisions in Section 5.1.3 Non-residential deployment periods , or 2. Decisions on whether or not an evaluation of occupied versus unoccupied concentrations, in accordance with Section 5.2, may be warranted. 6.2 Quality Control for Number of Valid Tests For dwellings or non-residential rooms where access problems, test conditions, or other reasons or situations prevented achieving a valid test result, follow-up procedures shall include testing all locations that were intended to be tested but did not result in valid measurements. Exceptions: a) Where it is decided to proceed with mitigation ; or b) Where all other test locations in the building are less than 2.0 pCi/L (75 Bq/m 3 ) and the number of missing valid tests in ground-contact locations of the building do not exceed the allowance in Table 6.2 . Table 6.2 Informative advisory —Characterization of radon hazards for each occupant within a shared building requires achieving a valid radon measurement in each location required in Section 3 . 6 7 Some latitude is provided based on a probability analysis of test results from 597 random buildings where all test results were less than 2.0 pCi/L (75 Bq/m 3 ). In this situation, the analysis indicated roughly 90-95% confidence that untested locations allowed in Table 5.6 will be below 4.0 pCi/L (150 Bq/m 3 ). 8 6.3 Quality Control for Devices Quality control check measurements deployed and retrieved shall include: a) Duplicate measurements or comparison checks for all device types at not less than 10% of all locations being tested in accordance with Section 2.8.2 ; and b) Field Blank measurements for CAD , ATD and EIC detectors, in accordance with Section 2.8.3 . 6 Using the Monte Carlo method to evaluate the reliability of screening multifamily housing for radon . David Wilson, Research Staff, Oak Ridge National Laboratory. AARST Radon Reporter, March 2020 7 Evaluation of Percentage-Base Radon Testing Requirements for Federally-Funded Multi-Family Housing Projects . Antonio Neri MD, MPH, Centers for Disease Control and Prevention. Journal of Occupational Health and Hygiene, January 2019 https://www.ncbi.nlm.nih . gov/pubmed/30620246 8 Evaluating and Assessing Radon Testing in Housing with Multifamily Financing (EARTH). See supplemental information in the Companion Guidance at the end of CG Section 2 Guidance for Building Managers. Ground-contact Test Locations: 4-7 8-11 12-15 16-19 20 or more Allowance: 1 2 3 4 5