Strip-Mall Renovation Survey
A 1974 strip mall is scheduled for a 14,000-square-foot renovation. The owner's pre-renovation survey, done by a certified inspector, reports: 3,800 sq ft of 12-inch floor tile with black mastic (tile 8% chrysotile; mastic 3% chrysotile); 1,100 sq ft of damaged suspended ceiling tile (2% chrysotile); 320 linear ft of friable pipe insulation in the mechanical room (15% amosite); and 2,000 sq ft of exterior transite panel (chrysotile, assumed 20%). The general contractor plans to chip up the floor tile, remove only the visibly damaged ceiling tiles, and demolish the transite panels with a pry bar and saw. The owner argues that because the floor tile is nonfriable, no asbestos notification is needed. The inspector could not open the hard-lid ceiling above the main sales floor, and no samples were taken there.
1. Classify each material as friable or nonfriable, Category I or Category II, and RACM or not. Then determine whether the renovation is regulated and whether notification is required.
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Use the NESHAP framework: RACM includes friable ACM and Category I or Category II nonfriable ACM that will be made friable by the work. The regulated-facility threshold is 260 linear feet, 160 square feet, or 35 cubic feet of RACM.
- Floor tile and mastic: Category I nonfriable. If kept intact, they are not RACM. But the plan is to chip them up, which makes them friable; once that happens, 3,800 sq ft is RACM and far exceeds 160 sq ft.
- Damaged suspended ceiling tile: friable ACM, 1,100 sq ft, so it is RACM and exceeds the threshold.
- Pipe insulation: friable ACM, 320 linear ft, so it is RACM and exceeds 260 linear ft.
- Transite panel: Category II nonfriable. If pried or sawed in a way that breaks or crushes it, it becomes RACM; 2,000 sq ft would exceed 160 sq ft.
Because RACM is present above the threshold, the renovation is regulated. The owner's argument fails: the floor tile is not the only material, and the planned chipping would convert it to RACM anyway. A notification is required.
2. What should be done about the inaccessible hard-lid ceiling above the main sales floor?
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The inaccessible space cannot be treated as asbestos-free just because no sample was taken. The inspector should make a documented effort to access it, using destructive inspection where necessary and safe. If access is still not possible, the material above the hard-lid ceiling should be assumed to be ACM until sampling proves otherwise.
- Assume ACM for surfaces that cannot be inspected, and include them in the abatement scope and notification.
- Do not let the contractor proceed on the assumption that 'no sample means no asbestos.' That is not a defensible position during renovation.
- Sample before disturbance if access can be created, using a certified inspector and proper composite sampling.
- Document the limitation in the survey report so the owner and contractor know the assumption and its basis.
A practical exam answer should also note that the assumption may increase cost and scope, but that is the correct trade-off when the alternative is uncontrolled disturbance of unknown material.
3. The owner wants to leave the floor tile in place and install new flooring over it. Is that acceptable, and what conditions apply?
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It can be acceptable if the tile and mastic remain intact and are not disturbed. Nonfriable Category I material that is not made friable is not RACM, and leaving it in place avoids generating asbestos dust.
Conditions:
- No chipping, grinding, sanding, or aggressive removal of the tile or mastic. Those operations make it friable and change its regulatory status.
- No drilling or cutting through the tile in a way that creates dust without controls; fasteners and transitions must be planned carefully.
- The new flooring must not rely on abrading the old surface. If surface preparation requires grinding, the material must be handled as RACM.
- Notification is still required because the ceiling tile and pipe insulation are RACM; the floor tile decision does not eliminate the regulated facility.
- Document the decision and keep the survey and sample results with the project file.
The key distinction is between leaving material in place and disturbing it. The owner's plan is acceptable only if the work truly leaves the tile intact.