MT Asbestos Abatement cheat sheet

Asbestos Control Program (ACP) scope: covers abatement, encapsulation, enclosure, and related disturbance of asbestos-containing material (ACM) in regulated facilities; the program owner must designate a certified asbestos project manager for each project.

ACM definition threshold: any material containing more than 1% asbestos by weight (gravimetric/PLM analysis) is regulated; below 1% is not ACM but may still require worker protection under general hazard rules.

Classification decision rule: a material is presumed ACM if it is friable, installed before the facility's asbestos cutoff date, and no valid bulk sample analysis exists; presumption must be documented in the project file before work begins.

Notification rule: the program must submit a written abatement notification to the regulatory authority at least 10 working days before start for projects above the threshold (commonly 10 square feet or 1 linear foot of ACM); emergency abatement must be reported within 24 hours with written follow-up.

Project manager duties: maintain the site-specific work plan, verify worker certification, ensure the regulated area is established, approve air monitoring results, and sign off on final clearance before reoccupancy.

Recordkeeping: retain bulk sample results, air monitoring data, worker training/certification records, waste manifests, and clearance documentation for at least 3 years after project completion (longer if required by the facility's permit).

Exemption rule: an ACP does not apply to single-family residential owner-occupied units, but does apply to common areas of multi-unit residential buildings and to any work performed for compensation.

Air monitoring decision rule: personal exposure monitoring is required whenever workers may be exposed above the permissible exposure limit (PEL) or short-term exposure limit (STEL); area monitoring is required for clearance and for regulated-area boundary verification.

Regulated area boundary: must be demarcated with critical barriers, warning signs at all entrances, and negative-pressure containment; only certified workers wearing required PPE may enter.

Negative pressure rule: maintain the containment at a pressure differential of at least -0.02 inches of water column relative to adjacent spaces; verify with a manometer at least twice per shift and record readings.

Decontamination sequence: workers exit through a clean room, then a shower, then an equipment room; PPE is removed in the dirty side and bagged before showering.

Wet methods: ACM must be wetted before and during disturbance; use amended water (surfactant) to reduce fiber release; dry removal is prohibited except where wetting creates a safety hazard.

HEPA requirement: all vacuums, negative air machines, and respirator cartridges used on site must be HEPA-filtered; non-HEPA equipment is prohibited in the regulated area.

Clearance decision rule: visual inspection must show no visible debris, then air samples must be collected inside the containment; clearance is granted only when all samples are below the clearance threshold (commonly 0.01 fibers per cubic centimeter by PCM, or the facility's stricter standard).

Waste handling: ACM waste must be bagged in leak-tight containers, labeled with the asbestos warning, and transported with a waste manifest; the generator retains a copy for at least 3 years.

Respirator selection rule: half-face HEPA respirators are minimum for Class II work; full-face powered air-purifying respirators or supplied-air respirators are required when exposure may exceed 10 times the PEL.