How long may hazmat be stored on site before treating or taking off site?

• A. 180 days
• B. 180 days (270 days if disposal plant is 200 miles away or farther)
• C. 90 days
• D. 365 days

Answer: (B)

Hazardous waste accumulation time on-site is governed by rules that allow a longer hold if the destination facility is far away. You may store hazardous waste on-site for up to 180 days, and extend to 270 days if the disposal or treatment plant is 200 miles away or farther. This reflects a practical allowance for long-distance transport while still enforcing safe storage and tracking. The other options don’t capture this distance-based extension, and the 270-day allowance is the key detail that makes this choice correct.