Which of the following methods is prohibited during lead abatement?

The method that is prohibited during lead abatement is the use of a heat gun exceeding 1100°F. This prohibition is based on safety and regulatory guidelines designed to minimize the risk of lead exposure and combustion hazards. When heat guns are used at temperatures surpassing this threshold, they can potentially vaporize lead particles, which can then become airborne and pose serious health risks to individuals in the vicinity by increasing the potential for inhalation of toxic lead fumes.

Additionally, the application of heat at this high temperature can also damage the substrate and create a fire hazard, further complicating safety during the abatement process. Lead abatement regulations are stringent because lead exposure can lead to severe health issues, particularly in children, emphasizing the importance of utilizing safe methods in the removal and management of lead-based paints and materials.

The other methods listed, such as wet scraping or sanding, encapsulation, and offsite paint removal, are generally regulated but can be performed safely when following proper procedures and protective measures. Wet methods help to control dust, encapsulation is a method of sealing lead-based paint, and offsite removal must adhere to established regulations to contain lead safely.