What must be considered for maximum allowable quantities of flammable materials in the lab?

The consideration of both stored chemicals and waste materials for maximum allowable quantities of flammable materials in the laboratory is essential for maintaining safety and compliance with regulations. This approach ensures a comprehensive evaluation of potential fire hazards presented by both the active use of chemicals and any waste that could accumulate.

In a laboratory environment, stored chemicals can be significant sources of flammable vapors or reactions if not properly managed. Additionally, waste materials, which may also contain flammable substances, contribute to the overall risk and must be accounted for in the total quantity of flammable materials present in the lab. By taking both categories into account, laboratory personnel can effectively minimize risks associated with fire and explosion, ensuring safer working conditions.

Other options focus on limited aspects of lab materials. For instance, only considering stored waste ignores the potential risks posed by active chemicals. Limiting the assessment to only liquid or solid materials neglects the comprehensive nature of flammability risks. Therefore, recognizing both stored chemicals and waste is crucial for effective safety management in the laboratory setting.