Abatement Methods, Removal Procedures, and Waste Handling
What this domain tests
Method questions test how to remove ACM without making it friable, and how to package and track waste. Expect glove-bag, mini-enclosure, wet-method, and manifest scenarios.
Core rules and concepts
- Wet removal uses amended water (water with a surfactant) to penetrate and suppress dust. Keep material wet throughout removal, bagging, and transport. Do not use dry cutting, sanding, grinding, or aggressive demolition on ACM.
- Glove bags are used for small, isolated pipe sections; mini-enclosures for small areas where a glove bag is impractical. Both must be maintained under negative pressure and HEPA-filtered when required.
- Remove ACM before demolition if it is RACM or will become RACM. Lower removed material; do not drop it. Wrap large components or lower them in lined containers.
- Waste is packaged in leak-tight, labeled containers-typically double 6-mil bags with a gooseneck seal, or drums for sharp or heavy debris. Labels identify the generator, contents, and disposal site. Waste shipment manifests track the load to an approved landfill.
- Nonfriable material can become RACM if broken, cut, or abraded. Handle it so it stays intact; if it cannot stay intact, use friable-material controls.
Worked example
A crew must remove 15 feet of insulated pipe above a suspended ceiling. A glove bag is practical if the pipe is accessible and the bag can be sealed around it. The worker wets the insulation, removes it inside the bag, wipes the pipe, seals the bag, and passes it out as waste. If the pipe is too large or the space too tight, a mini-enclosure with negative pressure is better. Dry pulling the lagging through the ceiling is the wrong method because it creates fibers and contaminates the ceiling.
Traps that cost marks
Do not call waste "ordinary trash" because it is bagged. Do not skip the manifest. Do not assume nonfriable means "no controls." Do not use amended water as a substitute for containment and HEPA filtration.