What are the five criteria set by the EPA for sealants used in encapsulation?

The five criteria set by the EPA for sealants used in encapsulation are crucial for ensuring the effectiveness and safety of these materials in asbestos abatement processes. The correct choice highlights essential performance characteristics that assess both the physical and chemical behavior of encapsulants.

Impact resistance is vital because encapsulants need to withstand mechanical stresses without breaking down. Flame spread is critical for safety, as it evaluates how quickly a fire could travel across the surface of the sealant, impacting building safety standards. Smoke generation during a fire is a significant concern for life safety; higher smoke generation can lead to greater hazards in emergency situations. The criterion for toxic gas release ensures that any materials used will not emit harmful gases if exposed to heat or other environmental conditions. Lastly, adhesive/cohesive strength is necessary for ensuring that the sealant remains firmly attached to the substrate and does not delaminate, which could compromise its protective function.

This combination of criteria ensures that the sealants effectively encapsulate asbestos and provide a durable, safe barrier, making choice B the most appropriate. Other options, while they may include relevant traits, do not all align with the specific performance standards required by the EPA.