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 9 3.0 TEST LOCATIONS 3.1 Ground-Contact Locations A measurement shall be conducted in all dwellings and all nonresidential rooms that are occupied, or intended to be occupied, that: a) have floors or walls in contact with the ground, and b) are closest to ground over untested ground-contact locations, to include the lowest level of the building over a crawl space , utility tunnel, parking garage or other non-habitable space that is in contact with ground. 3.1.1 Ground-contact dwellings For each ground-contact dwelling or living unit, a measurement shall be conducted in the lowest level that serves or could serve as a living area, sleeping quarters, office, playroom or otherwise be occupied for residential use at some time in the future. 3.1.2 Non-residential ground-contact locations For non-residential ground-contact locations, a measurement shall be conducted in all ground-contact rooms, offices, classrooms and other general use areas that are occupied or intended to be occupied. 3.2 Upper Floors On each upper floor, a measurement shall be conducted in at least one and not less than 10% of all dwellings and nonresidential rooms that are occupied or intended to be occupied. These measurements shall be in addition to tests performed in ground-contact locations and rooms or dwellings that adjoin immediately above untested ground-contact locations. 3.3 Locations Not to Test Unless for investigative purposes, test locations shall not include hallways, closets and bathroom or shower areas unless they are open to other rooms that are occupied for other purposes. Note— Table 3.8 provides additional requirements regarding rooms that are not to be tested. Figure 3 D Upper floors Figure 3 B Slab on grade Figure 3 C Over Crawl Spaces Figure 3 A Basements and Walls