CDPH Lead Inspector/Assessor California State Practice Exam

When are negative air machines required during lead inspections?

1. During routine cleaning

2. Before beginning any project

3. When abrasive floor blasting or sanding

4. Only during removal of lead-based paint

The correct answer is: When abrasive floor blasting or sanding

Negative air machines are required during lead inspections specifically when abrasive floor blasting or sanding is taking place. This equipment plays a vital role in maintaining safety standards by ensuring that airborne lead dust and contaminants do not migrate to other areas of a property. The abrasive methods used in floor blasting and sanding can create significant dust and particulate that, in the case of lead presence, could pose health risks to occupants and workers if not properly contained. Using negative air machines helps to control and filter the air, thereby reducing the risk of exposure during these high-risk activities. The machines work by creating a negative pressure environment, which safely captures and contains lead particulates in the air, filtering them out and preventing their spread into the surrounding spaces. While negative air machines may be important in various other circumstances related to lead removal or containment, their requirement is most critical during abrasive operations, where the generation of dust is inevitable and potentially hazardous.