What must be established before taking down an asbestos containment?

Before dismantling an asbestos containment, it is imperative to achieve clearance sample approval. This step ensures that the area has been thoroughly assessed and deemed safe for re-entry, indicating that airborne asbestos fibers are below established safety limits. Clearance sampling is performed after all asbestos-containing materials have been removed and the area has been cleaned, allowing for an objective analysis of whether any hazardous substances remain.

Visual inspections alone do not provide a definitive measure of airborne asbestos levels, which can only be confirmed through laboratory analysis of collected air samples. Worker approval may refer to personnel feelings or wishes, which are not scientifically grounded assessments necessary for health and safety. Safety gear inspection, while vital for maintaining proper personal protective equipment standards during the removal process, is unrelated to the safety of the environment post-removal. Overall, clearance sample approval is a critical step in ensuring that all necessary health and safety standards are met before the containment is dismantled.