Final answer:
An A/W in the first column of the hazmat table signifies an 'Ambient Water' limitation, meaning the hazardous material should not come into contact with water at ambient conditions. These designations are part of the safety regulations managed by the EPA.
Step-by-step explanation:
An A/W in the first column of the hazmat (hazardous materials) table indicates an "Ambient Water" limitation. This signifies that the particular hazardous material listed should not be exposed to water at ambient conditions. The hazmat table is crucial for ensuring the safe handling, storage, and transportation of hazardous materials. Failing to adhere to limitations like the A/W designation can result in dangerous reactions and poses a significant risk to health and the environment.
Hazardous waste management program, developed by the Environmental Protection Agency (EPA), is designed to oversee and regulate the handling of listed wastes, characteristic wastes, and mixed wastes. Listed wastes include materials from common manufacturing and industrial processes, as well as discarded commercial products. Characteristic wastes are those that exhibit properties such as ignitability, corrosivity, reactivity, or toxicity.