MD Asbestos Abatement common mistakes
MD Asbestos Abatement · Understand the traps and how to avoid them.
Selects a half-mask P100 respirator for a removal where the estimated airborne fiber concentration is 2 f/cc, believing the HEPA filter makes the respirator protective at any concentration.
Candidates memorize filter efficiency (99.97%) and miss that the respirator's assigned protection factor, not the filter, sets the maximum use concentration.
What to do instead
Calculate maximum use concentration as APF x PEL: a half-mask APR with APF 10 gives 1.0 f/cc against the 0.1 f/cc PEL; at 2 f/cc select a full-facepiece APR (APF 50) or higher and verify against the OSHA APF table.
Applies the 260-linear-foot, 160-square-foot, and 35-cubic-foot NESHAP notification thresholds to all suspect material in the building instead of only the regulated asbestos-containing material that will be disturbed.
The thresholds are easy to memorize, but the RACM definition and the to-be-disturbed qualifier are tested separately and get collapsed into one number.
What to do instead
Classify each material first as ACM above 1% asbestos, then as RACM (friable, Category I that will be sanded/ground/cut, or Category II likely to crumble); sum only the RACM to be disturbed and notify if any threshold is met.
Accepts final clearance on a PCM result of 0.008 f/cc while visible dust and debris remain on the floor, skipping the visual inspection.
Clearance is taught as a number, so candidates treat the 0.01 f/cc criterion as the only gate and forget the inspection step.
What to do instead
Perform the visual inspection first; no dust or debris may remain. Then run clearance air samples after the required settling time, and only then compare the PCM result to the clearance criterion.
Removes the respirator in the dirty room or equipment room before entering the shower because the filter feels clogged.
The decontamination sequence is memorized as a series of rooms, not as the specific point at which the respirator comes off.
What to do instead
Keep the respirator on through the shower and remove it only in the clean room after showering and drying. A clogged filter is changed in the dirty room; the respirator itself stays on.
Labels waste bags DANGER - CONTAINS ASBESTOS but ships them without a waste shipment record and without confirming the receiving landfill is permitted to accept asbestos.
OSHA warning-label content is confused with DOT shipping papers and with state waste-tracking requirements, so the label is treated as the whole packaging obligation.
What to do instead
Use the full OSHA warning label with generator name and address, complete the waste shipment record before waste leaves the site, retain the generator copy, and verify the landfill's asbestos permit before shipment.
Treats the annual respirator fit test and respirator medical evaluation as satisfying the asbestos medical surveillance obligation, so no separate asbestos questionnaire, physical exam, or chest X-ray is scheduled.
Two OSHA standards, 1910.134 and 1910.1001, both require medical evaluations, and candidates merge them into one annual event.
What to do instead
Track them separately: respirator medical evaluation before fit testing and annually; asbestos medical surveillance at no cost when exposure exceeds the PEL for 30 or more days per year, with the required exam elements and frequency.
Says smoking and asbestos exposure combine additively for lung cancer risk.
The numbers for mesothelioma and lung cancer blur together; candidates recall that both cause cancer but not the direction of the interaction.
What to do instead
Memorize the interaction as synergistic or multiplicative: asbestos-exposed smokers have lung cancer risk far greater than the sum of either exposure alone, commonly cited at roughly 50 to 90 times the risk of nonsmokers.
Begins removal before the containment has been placed under negative pressure and verified with a manometer or smoke test.
Work practice steps are learned as a checklist without the pressure-verification gate, so the negative air machines are started but not confirmed.
What to do instead
Sequence the job: seal critical barriers, install the decontamination unit, start HEPA negative air machines, verify pressure differential and airflow direction, then begin removal; monitor continuously.
Sends the Maryland abatement notification to EPA Region III or the county health department instead of the Maryland Department of the Environment, or files it fewer than 10 working days before start.
Federal NESHAP and Maryland COMAR requirements overlap, and candidates assume EPA is the only recipient of the notification.
What to do instead
Maryland requires notification to the MDE Asbestos Program at least 10 working days before abatement begins; use the state form and keep the acknowledgment. EPA notification is not a substitute.
Reports PCM fiber counts as asbestos fibers on the clearance report without noting that PCM counts all fibers and cannot distinguish asbestos from cellulose, gypsum, or other fibers.
PCM is the routine method, and candidates equate the word fiber with the word asbestos.
What to do instead
State PCM results as total fibers; use TEM with selected-area electron diffraction and energy-dispersive X-ray for asbestos identification or speciation when required, and do not overinterpret PCM.