What must be readily available to clients upon request during radon mitigation work?

The correct answer highlights the importance of Material Safety Data Sheets (SDS) being readily available to clients during radon mitigation work. SDS documents provide essential safety information about the materials used in the mitigation process, including potential hazards, safe handling procedures, and emergency measures. By having these sheets accessible, clients can understand any risks involved with the products being used in their homes, ensuring they are informed and can take necessary precautions to protect themselves and their family.

This availability is vital because it fosters transparency and communication between the mitigation specialists and clients. It demonstrates a commitment to safety and adherence to regulatory requirements, which often mandate the provision of such information. Clients can make informed decisions and have peace of mind knowing they have access to important safety data.

While feedback forms, compliance certificates, and manufacturer warranties also serve important functions in the context of radon mitigation, they do not pertain to immediate health and safety concerns related to chemical exposures in the same way that SDS documents do. Having SDS sheets available is a specific legal requirement in many regions, further emphasizing their necessity in the mitigation process.