During demolition of a 1960s building, a contractor discovers suspected asbestos-containing materials. Under Cal/OSHA Title 8, what is the first required action before continuing work?
Correct Answer
D) Presume the material contains asbestos and implement Class I procedures
Cal/OSHA Section 1529 requires that suspected asbestos-containing materials in buildings built before 1981 be presumed to contain asbestos, and Class I asbestos work procedures must be implemented.
Why This Is the Correct Answer
Cal/OSHA Section 1529 requires that when asbestos-containing materials are suspected in buildings constructed before 1981, they must be presumed to contain asbestos. The contractor must immediately implement Class I asbestos work procedures—the most stringent level—which include full containment, respiratory protection, and worker decontamination. This is the mandatory first action before any other step.
Why the Other Options Are Wrong
Option A: Continue work with enhanced PPE
Continuing work with enhanced PPE is a dangerous and illegal response. Until a proper Class I assessment and procedure is in place, no work can continue. Simply adding PPE without Class I containment violates Cal/OSHA Section 1529.
Option B: Stop work and conduct air monitoring
Stopping work and conducting air monitoring is a reasonable instinct but not the correct first action under Cal/OSHA. The regulation requires presuming asbestos presence and implementing Class I procedures first—air monitoring is part of Class I procedures, not a standalone prior step.
Option C: Wet the material and continue with normal procedures
Wetting the material and continuing with normal procedures is inadequate. Wetting is a control technique used within proper asbestos procedures, not a substitute for them. Normal procedures cannot be used where asbestos is present or presumed.
Memory Technique
Pre-1981 building + suspected ACM = PRESUME + CLASS I. No testing needed to trigger Class I. Think of it as guilty until proven innocent: presume asbestos, protect accordingly.
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