Which surfaces can be encapsulated according to lead safety protocols?

Encapsulation is a strategy used in lead hazard management to cover lead-contaminated surfaces in order to prevent lead dust and chips from being released into the environment. According to lead safety protocols, some surfaces can be effectively encapsulated to manage lead exposure risks.

Windowsills that aren't considered "moving parts" (M/I) are suitable for encapsulation because they are static surfaces that are less likely to be subjected to wear and tear from daily use, minimizing the risk of lead exposure from deterioration. Handrails can also be encapsulated, provided they are not the components that users grip frequently and that may experience significant abrasion or friction, which could compromise the encapsulation layer.

On the other hand, friction components, such as window components that move (like window sashes), pose a greater risk due to the wear that can occur from their operation, which can lead to lead dust release. Floors are also subject to high traffic and wear, making encapsulation less effective.

Thresholds and moving components typically require different handling as they can be subjected to wear that might disrupt encapsulation. Therefore, option B is the most accurate representation of surfaces that can be encapsulated according to lead safety protocols.