ARCHIVED REPORTS_ROY'S AUTO - HISTORICAL (2)

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If there was an interior containment area, collect one floor sample outside the containment area but within 10 feet of the airlock.. HOW MANY SAMPLES The total number of samples will depend on the number of interior rooms, the presence of an interior containment area, whether there was any exterior work, the number of windows present, and the presence of horizontal surfaces on the exterior. For example, consider a single family house with 8 interior rooms and areas. In this case suppose abatement had taken place in 4 of the interior rooms, and on the front and back of the house. There was no interior containment area, and on-site removal of paint took place in the interior. All rooms had windows. There would be 26 dust samples for this house, 3 from each of the 8 interior rooms or areas, and 2 from the exterior. As another example, consider another house with 8 interior rooms or areas. Suppose abatement had taken place in the interior, in 5 rooms, with a containment separating these 5 rooms from the rest of the house. Suppose no on-site removal of paint had taken place. There would be 11 interior dust samples, 2 from each of the 5 rooms were abatements were done, plus one floor sample within 10 feet of the containment area. If there had been any exterior work, 2 dust samples would have been collected from the exterior. In a multi-family housing of more than 20 units, random sampling of units for clearance testing is allowed. Units and buildings that have similar construction and were cleaned in the same manner should be grouped for sampling purposes. Samples may be selected for each group. The number of units in the sample should be derived from Table 1, which is attached. In this case, guidance on where to sample for the selected units is the same as for an individual house. However, if any component in the sample of units fails clearance, that component, in all the unsampled units, must be re-cleaned, as well the specific components that failed clearance in sampled units. The significance of this aspect of clearance failure should be grasped before selecting a sample of units. HOW TO SAMPLE Draw or obtain a floor plan of the house or unit. Rooms, areas, and locations of windows should be clearly marked on the floor plan. If there were exterior abatements, identify the window exterior sills and horizontal surfaces closest to the exterior areas that were worked on. Using information about the abatement or interim control applications, designate interior rooms and areas and exterior areas for sampling. Using the floor plan, go through the residence and make selections of where to sample. For floors, divide each room or area into three segments, randomly select one of the segments, and then, within the segment, randomly select either a position near a wall or a position near the center. If there is one window in a room or area, that window should be 2