ND Asbestos Abatement flashcards
ND Asbestos Abatement · Build recall with a focused review session.
32 cards. Read the term and the definition here. The deck at the top of this page is optional.
- PEL for asbestos
- OSHA permissible exposure limit is 0.1 fibers per cubic centimeter as an 8-hour time-weighted average, measured by phase contrast microscopy.
- Excursion limit
- The short-term asbestos exposure limit of 1.0 fiber per cubic centimeter averaged over any 30-minute sampling period during a shift.
- Regulated area sign
- Warning sign required at asbestos work areas reading DANGER, ASBESTOS, AUTHORIZED PERSONNEL ONLY, with a description of the required protective equipment.
- Decontamination unit sequence
- A three-stage unit: dirty room for removing contaminated clothing, shower room for washing, and clean room for dressing in street clothes.
- Wet methods
- Technique of wetting asbestos-containing material with amended water before and during disturbance to suppress fiber release into the air.
- Assigned protection factor
- The expected workplace level of respiratory protection for a properly fitted respirator class; half-mask APR is 10 and full-face PAPR is 1,000.
- Negative pressure requirement
- Containments must be held at least 0.02 inches of water column below adjacent areas, verified with a manometer and recorded regularly.
- Aggressive air sampling
- Clearance sampling performed after forcing air movement with a leaf blower or fan to suspend settled fibers before collecting samples inside the enclosure.
- Clearance criterion
- Final clearance passes when all inside air samples are below 0.01 fibers per cubic centimeter by PCM, or the stricter limit in the specification.
- Critical barriers
- Seals placed over HVAC openings, doors, windows, and other penetrations to isolate the work area and prevent fiber migration.
- Waste manifest
- Shipping document identifying the generator, quantity, and destination of asbestos waste, retained as a record of proper disposal.
- Medical record retention
- OSHA requires employers to keep employee medical records for the duration of employment plus 30 years after separation.
- Homogeneous area
- Material that appears uniform in color and texture and was installed at the same time, sampled as a single unit.
- PLM analysis
- Polarized light microscopy per EPA 600/R-93/116 identifies asbestos type and estimates percentage; point counting is used near 1 percent.
- Friable material
- Asbestos-containing material that can be crumbled, pulverized, or reduced to powder by hand pressure when dry.
- Thermal system insulation
- Surfacing material applied to pipes, boilers, tanks, and ducts to control temperature; a common category of asbestos-containing material.
- Sampling layers
- A coring tool must penetrate all layers of layered material, and each distinct layer is analyzed separately for asbestos content.
- Inspection report contents
- Documents homogeneous areas, sample locations, quantities, material condition, analytical method, and a floor plan of the building.
- Management plan update
- AHERA management plans must be updated every 3 years following reinspection, and periodic surveillance occurs every 6 months.
- Response action hierarchy
- Preferred options ranked from removal through enclosure, encapsulation, repair, operations and maintenance, to no action, chosen by hazard.
- Hazard assessment
- Combines material condition, friability, accessibility, and likelihood of disturbance to assign a priority ranking for response.
- O&M program
- Operations and maintenance plan for friable asbestos left in place, including cleaning, training, and periodic surveillance every 6 months.
- Enclosure versus encapsulation
- Enclosure places a rigid barrier over the material; encapsulation seals the surface with a coating. Neither removes the hazard.
- Reinspection interval
- A certified inspector must reinspect asbestos-containing material every 3 years so the management planner can revise the plan.
- Negative air machine sizing
- Machines are sized to provide roughly one air change every 15 minutes, or enough capacity to hold the containment under negative pressure.
- Design specification contents
- Scope of work, containment layout, decontamination plan, waste route, air monitoring method, and clearance criteria prepared by the designer.
- HVAC shutdown
- Building heating and cooling systems serving the work area must be isolated and locked out to prevent fiber distribution through ducts.
- TEM versus PCM
- PCM counts all fibers and is used for routine monitoring; TEM identifies asbestos fibers specifically and is used where specifications require it.
- Project monitor role
- Independent observer who verifies contractor compliance with the specification, documents conditions, and reports deviations to owner and contractor.
- Stop-work condition
- A sustained loss of negative pressure, breached containment, or visible debris release that requires halting work until corrected.
- Daily monitoring log
- Record of dates, times, personnel, manometer readings, air sample results, deviations observed, and corrective actions taken on site.
- Final monitoring report
- Compilation of inspection findings, air monitoring data, clearance results, and a compliance statement delivered to the building owner.