Decontamination runoff should be diverted for treatment or disposal later.

• A. Divert to a contained area for later treatment
• B. Immediately release into the environment
• C. Dump into storm drain
• D. Ignore it

Answer: (A)

Decontamination runoff is potentially contaminated with hazardous residues, so it must be kept under control and treated properly. Diverting it to a contained area for later treatment or disposal ensures the material doesn’t spread to soil, surface water, or the storm system, and it allows the responders to handle it with the correct waste procedures and facilities. This approach protects people, the environment, and compliance with safety and environmental rules. Releasing runoff immediately, dumping it into a storm drain, or simply ignoring it would spread contamination and create serious health and regulatory risks.