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 18 6.0 CONDUCTING THE TEST 6.1 Quality Control of Required Test Conditions Informative advisory —Avoid testing during weather that is unusually severe for local weather if the test period is less than 4 days. When this occurs during a test, retesting may be appropriate. 6.1.1 Where closed-building conditions cannot be maintained Tests shall not be conducted if closed building conditions, as required in Section 4 , cannot be maintained across the test period for tests lasting up to 90 days. 6.1.2 Where closed-building conditions did not occur prior to the test Where closed-building conditions were not maintained for twelve hours prior to deployment, as required in Section 4 , the radon testing shall be conducted with one of the following options: a) The testing is postponed until at least 12 hours of closed-building conditions have been maintained prior to initiating the test; or b) The test period is extended to 4 days or more after closed-building conditions are initiated; or c) The test period is extended, if testing with a continuous monitor. For this option, device features or other methods shall be employed to obtain an average test result that represents no less than 46 hours of contiguous data collected after 12 hours of closed building conditions were maintained. 6.1.3 Individual dwellings or rooms When testing only one or several dwellings or rooms that are part of a shared building, such as when testing upper floors identified in Section 3.2 or an individual apartment, classroom or office, minimum requirements include closed-building conditions in accordance with Section 4 for dwellings and non- residential enclosed rooms: a) immediately adjoining above and below the test location(s), and b) on all floors directly below test location(s) that are 3 stories or less above grade. 6.1.4 Failed closed conditions Where compliance with closed-building conditions in Section 4 did not occur for non-residential rooms, dwellings or untested ground-contact spaces, retest procedures shall include retesting those rooms or dwellings and any tested rooms or dwellings: a) that immediately adjoin the side, above and below such locations, and b) that share the same heating or cooling air ducts. 6.1.5 Where closed conditions pose a health hazard If observing that closed-building conditions present a health hazard, the test shall not be conducted under conditions that place an occupant in harm’s way. Note—Hot weather is an example where closed building conditions can pose a health hazard in buildings that have no cooling systems. Safe conditions can violate requirements of this standard such as use of outdoor air ventilation, window fans or evaporative cooling systems. 6.1.6 Fulfilling minimum requirements To fulfill minimum requirements for verifying test conditions, all the following steps, that are covered in greater detail elsewhere in this standard, are required: a) Inform the person responsible for building operation of the required test conditions; b) Ensure that notifications of a “Radon Test in Progress” are posted in conspicuous locations. Note— Exhibits 4 and 8 provide examples of public notices, door hangers and device placards;