CMI Personal Protective Equipment for Mold Work 2 — Questions and Answers
Question 1: OSHA requires a written respiratory protection program when employees use respirators for mold work under which standard?
- 29 CFR 1910.134 — Respiratory Protection Standard (Correct answer)
- 29 CFR 1910.1000 — Air Contaminants Standard
- 29 CFR 1926.62 — Lead Exposure in Construction
- 29 CFR 1910.1200 — Hazard Communication Standard
Correct answer: 29 CFR 1910.134 — Respiratory Protection Standard
OSHA 29 CFR 1910.134 is the dedicated Respiratory Protection Standard that requires employers to establish a written program covering selection, medical clearance, fit testing, training, and maintenance whenever workers use respirators. 1910.1000 addresses airborne contaminant PELs, 1926.62 governs lead in construction, and 1910.1200 covers hazard communication — none establish a respirator program framework.
Question 2: A fit test for a half-face respirator is required under OSHA 1910.134 at what minimum frequency?
- Every 5 years
- At initial assignment and annually thereafter (Correct answer)
- Only when the worker changes job duties
- Every 6 months for workers in high-risk environments only
Correct answer: At initial assignment and annually thereafter
OSHA 1910.134 requires fit testing at initial assignment to a job requiring respirator use and at least annually thereafter to account for facial changes from weight fluctuation, dental work, scarring, or aging that can break the seal. A five-year interval or testing only at job duty changes would fail to detect gradual fit degradation that compromises protection between tests.
Question 3: When performing mold inspection (not remediation) activities, including surface sampling and limited disturbance of suspect materials, the minimum recommended PPE includes:
- No PPE is required for inspection-only activities
- N95 respirator, disposable gloves, and eye protection (Correct answer)
- Full Tyvek suit, P100 respirator, and supplied air
- Only safety glasses per general job site requirements
Correct answer: N95 respirator, disposable gloves, and eye protection
For inspection-only activities including surface sampling and limited material disturbance, industry guidelines (IICRC S520) recommend N95 respirator, disposable gloves, and eye protection as a baseline. No PPE is never acceptable when suspect materials are being disturbed. Full Tyvek and P100 are appropriate for remediation or heavily contaminated areas, not routine inspection. Safety glasses alone fail to protect the respiratory system from airborne spores.
Question 4: A P100 cartridge on a half-face air-purifying respirator filters particles with what efficiency rating?
- 95% at 0.3 microns
- 99.97% at 0.3 microns (HEPA-equivalent) (Correct answer)
- 100% of all particles regardless of size
- 90% at 1.0 microns
Correct answer: 99.97% at 0.3 microns (HEPA-equivalent)
P100 cartridges filter at least 99.97% of particles at the most penetrating particle size of 0.3 microns, making them equivalent to HEPA filtration. The 'N95' designation filters 95%, not P100. No respirator filters 100% of all particles — that claim applies to supplied air systems. The 90% at 1.0 microns describes a lower-tier filter, not P100.
Question 5: Double-bagging contaminated materials before removing them from a mold remediation work area serves which primary protective function?
- To comply with municipal solid waste regulations for all construction debris
- To prevent cross-contamination of clean areas by containing spores within the bags during transport (Correct answer)
- To reduce the weight of materials for safe lifting
- To facilitate recycling of contaminated building materials
Correct answer: To prevent cross-contamination of clean areas by containing spores within the bags during transport
Double-bagging ensures that spores clinging to the outer surface of the first bag are contained within a second clean bag, preventing cross-contamination as materials move through clean areas during transport. Municipal solid waste regulations do not require double-bagging of all construction debris. Weight reduction and recycling are irrelevant to the purpose of double-bagging in mold remediation.
Question 6: An inspector working in an attic with suspected Stachybotrys contamination should use which respirator at minimum?
- A dust mask (nuisance mask) is sufficient for short exposures
- N95 filtering facepiece respirator at minimum, with full-face P100 preferred for large contaminated areas (Correct answer)
- No respirator is needed if work is limited to visual inspection only
- SCBA is always required when Stachybotrys is suspected
Correct answer: N95 filtering facepiece respirator at minimum, with full-face P100 preferred for large contaminated areas
IICRC S520 and EPA guidelines call for at minimum an N95 for mold inspection, with full-face P100 recommended when Stachybotrys is suspected or contamination is extensive. A nuisance dust mask provides no respiratory protection against mold spores. Visual-only inspection does not eliminate exposure risk since spores can be disturbed. SCBA is not universally required for Stachybotrys — that level is reserved for extreme scenarios.
CMI Personal Protective Equipment for Mold Work 2
OSHA requires a written respiratory protection program when employees use respirators for mold work under which standard?