A contractor performs renovation that disturbs lead-based paint in a building. Cal/OSHA's lead in construction standard requires the employer to:

Explanation

Section 1532.1(d) requires an initial determination of whether any employee may be exposed at or above the action level of 30 micrograms per cubic metre, and until that determination is complete the employer must treat the listed trigger tasks as presumed overexposures and supply interim protection: respirators, protective clothing, change areas, washing facilities, training and initial biological monitoring. Option (a) reverses that - the protection is not something added once a monitoring result comes back. Option (b) is an environmental notification and protects nobody on the crew. Option (d) borrows the one-percent-by-weight figure that defines lead-based paint for housing purposes; this standard turns on what is in the AIR, and a coating below that concentration can still put a worker over the limit once it is burned, blasted or sanded.