Vinyl Tile, a Ride-On Stripper, and Occupied Guest Rooms

Under OSHA this is Class II work, not Class IV. Class IV is custodial or maintenance activity where ACM products or debris are disturbed incidentally-popping a few tiles to access a drain, for example. Removing 3,500 sq ft of tile and mastic as a planned renovation is Class II removal of ACM other than TSI or surfacing material. Calling it Class IV would improperly avoid regulated-area controls, trained workers, respirators, and medical surveillance.

Under NESHAP, the contractor's Category I argument is also wrong. Category I nonfriable material such as vinyl floor tile is excluded from RACM only while it remains nonfriable. The proposed carbide stripper can crack and crumble tile, and the grinder on mastic is expressly the kind of sanding, grinding, cutting, or abrading that makes Category I material RACM. The mastic itself contains 2% chrysotile, above the 1% threshold. Because the project involves more than 160 square feet of RACM, written notification is required at least 10 working days before the start, and Hawaii's delegated program may require a fee and additional information. The notification must be filed before work begins; it has not been.

Dry grinding and dry stripping are unacceptable. The work should use wet methods, HEPA vacuum-assisted removal, and manual or low-speed tools that do not abrade the mastic. The corridor should be a regulated area with critical barriers at doors, sealed HVAC registers, negative-pressure HEPA units, and a decontamination unit. If the contractor has no valid negative exposure assessment for these conditions, it must use Class I-level controls and respiratory protection. The ride-on stripper is a poor choice because it generates debris and is hard to contain; wet scraping or chemical mastic softeners followed by HEPA vacuuming are better. Daily housekeeping with HEPA vacuums and wet wiping, no dry sweeping or compressed air. Waste goes into leak-tight, labeled containers. The hotel must also protect occupied guests by isolating or shutting down the corridor HVAC, sealing returns, and relocating guests adjacent to the work.

The contractor should conduct personal exposure monitoring for each worker and area monitoring in the corridor and at the boundary of the work area. Because the work is Class II without a negative exposure assessment, at minimum half-mask HEPA respirators are required, with powered air-purifying respirators preferred for comfort during long shifts. Workers need disposable coveralls, gloves, eye protection, and boot covers where appropriate, plus fit testing and medical evaluation before respirator use. Training must cover the hazards of floor tile and mastic and the decontamination sequence.

Guest protection starts with isolation: shut down or temporarily modify the corridor HVAC so it does not draw dust into guest rooms, seal supply and return grilles with poly, and relocate guests whose rooms open directly onto the work zone. The corridor should have critical barriers and negative pressure, and the work should be scheduled to minimize guest traffic. Boundary air monitoring should confirm that fibers are not migrating. After removal, the corridor needs a visual inspection and clearance sampling before guests use it. The hotel should document guest notifications and the HVAC isolation steps, because a clean containment is ineffective if the building's air handling system bypasses it.