What type of documentation is required when using compressed gases at a facility?

The requirement for documentation when using compressed gases at a facility primarily includes Material Safety Data Sheets (MSDS) and inventory logs. MSDS are crucial as they provide detailed information about the properties of each compressed gas, including hazards, handling and storage guidelines, and emergency measures. This information is vital for ensuring safe practices and compliance with safety regulations.

Inventory logs serve another important purpose by tracking the quantity and type of compressed gases present in the facility, which is essential for both safety and regulatory compliance. Accurate inventory lists help in managing the usage and storage of these gases, ensuring that the facility is aware of what is on hand and can monitor for any leaks or mishandling of materials.

Together, MSDS and inventory logs create a comprehensive safety system that supports the safe use and handling of compressed gases, making option C the correct answer. Other documentations, while important, do not encompass the complete spectrum of documentation specifically required in this context.