Hazardous materials and bounded quantitative assessment
Separate a material’s hazard from the conditions that determine exposure and incident development. Oxidizing, water-reactive, flammable and self-reactive materials do not behave identically. An agent suitable for ordinary combustible material can create additional hazards when used on a reactive substance. Identify the material through reliable documentation and use the applicable safety data and trained response arrangements rather than choosing water simply because it is available.
Flammable-vapor behavior depends on concentration, temperature, pressure and the available oxidizer. A concentration outside a stated flammable range is not a universal declaration that the whole system is safe: mixing, leakage or changing conditions can create a different concentration elsewhere. Inerting also creates hazards for people and requires an engineered process, not an improvised purge.
A designated-quantity calculation uses the actual Korean classification and the applicable specified quantity for each material. When the exercise supplies these values, calculate each stored amount divided by its own reference quantity and add the resulting dimensionless multiples. Do not add liters and kilograms directly or treat a classroom result as an approved storage plan. Compatibility, containment, ventilation, equipment and legal requirements need separate assessment.