A contractor is demolishing a building constructed in 1978. Suspect asbestos-containing materials are present. Before disturbing these materials, what is required under Cal/OSHA Section 1529?
Correct Answer
C) Bulk sampling and laboratory analysis
Cal/OSHA requires bulk sampling and laboratory analysis to determine asbestos content before disturbing suspect materials in buildings constructed before 1981.
Why This Is the Correct Answer
Cal/OSHA Section 1529 (Asbestos) requires that before any disturbance of suspect asbestos-containing material (ACM), bulk samples must be collected and submitted to an accredited laboratory for analysis. Visual inspection alone cannot confirm or rule out asbestos content — only laboratory analysis of physical samples can establish whether the material contains asbestos at or above the regulatory threshold (typically 1% by weight).
Why the Other Options Are Wrong
Option A: Visual inspection by qualified person
A visual inspection by a qualified person is insufficient to identify asbestos. Asbestos fibers are microscopic and cannot be detected by sight. While a visual inspection may identify suspect materials, it does not satisfy the requirement to determine actual asbestos content before work begins.
Option B: Air monitoring for 24 hours
Air monitoring for 24 hours is a control measure used during and after asbestos work to verify that fiber concentrations are below permissible exposure limits. It is not the initial step required before disturbing suspect materials, and it cannot tell you whether the material contains asbestos before disturbance.
Option D: Notification to building occupants only
Notification to building occupants is a required step in certain circumstances (particularly in occupied buildings), but it does not substitute for bulk sampling and laboratory analysis. Notification alone does not establish the asbestos content of the material.
Memory Technique
Remember the sequence: SAMPLE before you DISTURB. Think 'Suspect = Sample First.' The 1978 date is a clue — asbestos was widely used in construction before 1981, so pre-1981 buildings should always trigger the bulk sampling protocol.
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