Which lead hazard control practice is not recommended by HUD?

Dry scraping or sanding is not recommended by HUD as a lead hazard control practice because it can generate lead dust and chips, which pose a significant risk of lead exposure. The method disrupts the leaded paint surface and releases harmful particles into the air and environment. This technique does not adequately contain the lead hazard and may lead to increased exposure for occupants, especially vulnerable populations such as children.

In contrast, encapsulating surfaces is a safer practice that involves applying a special coating over lead-based paint to seal it and prevent the release of lead particles. Replacing leaded paint altogether is also a recommended approach, as it eliminates the source of lead hazard. Using water-based paints is beneficial for surfaces that have been prepared properly and does not pose the same risks associated with lead dust exposure during lead hazard control interventions. Thus, dry scraping/sanding stands out as the unsuitable option for lead hazard control according to HUD guidelines.