The requirement for patch tests is to ensure what?

The requirement for patch tests primarily focuses on the effectiveness of the encapsulation method. When encapsulating lead paint, it is crucial to ensure that the materials used are adequately preventing lead dust or chips from becoming airborne and are effectively sealing the lead hazard. A patch test evaluates whether the encapsulation has successfully adhered to the underlying surface and is functioning as intended to minimize lead exposure. This testing verifies that the encapsulation method not only bonds well to the surface but also provides the necessary protection against lead hazards, making it a critical step in ensuring safe environments for occupants.

Other considerations such as safety for occupants, compliance with regulations, and surface integrity may play roles in overall lead hazard remediation practices but are not the primary focus of patch tests. Patch tests specifically target the functionality of the chosen encapsulation method, making this option the most relevant and accurate answer.