Which of the following is not a lead abatement method?

Sealing with wallpaper is not classified as a recognized lead abatement method. Lead abatement methods are specifically designed to eliminate or minimize lead hazards through techniques that either remove lead from surfaces or prevent exposure to lead dust and particles.

Encapsulation involves covering lead-based paint with a protective barrier, which can be effective in preventing lead exposure if done correctly. The removal of contaminated materials is a direct approach to eliminate lead hazards altogether by safely disposing of items that contain lead. Wet sanding is an abatement method that minimizes dust generation while smoothing surfaces that contain lead-based paint.

In contrast, while sealing with wallpaper might reduce visible lead dust, it does not directly address the underlying hazard posed by lead. Therefore, it is not considered a valid method for lead abatement.