ICC Decommissioning (U2) Exam Questions & Answers
2026–2027 | Latest Comprehensive Practice Test Bank with
Verified Correct Answers | Complete ICC U2
Decommissioning Certification Study Guide, Exam Prep &
Success Bundle
THIS EXAM INCLUDES:
✔ Latest ICC U2 Decommissioning practice exam questions and answers
✔ Comprehensive coverage of decommissioning principles, procedures, and industry
standards
✔ Verified correct answers with detailed explanations and rationales
✔ Mock exam questions designed to simulate actual certification testing conditions
✔ Updated study materials aligned with current industry practices
✔ Ideal for certification preparation, workforce training, professional development,
and exam success
,UST Decommissioning & Regulations
1. How many days prior to a permanent closure must
owners/operators notify the state implementing agency?
A. 10 days
B. 20 days
C. 30 days
D. 60 days
2. Which entity requires notice for temporary closure of a UST?
A. EPA federal regulations
B. State implementing agencies
C. Local fire department
D. OSHA
3. What is the notice requirement for temporary closure when taking
the ICC decommissioning exam?
A. 24 hours
B. 30 days
C. 7 days
D. No notice is required
4. Which of the following must be reported within 24 hours?
A. Any spill of petroleum regardless of size
B. A spill of 10 gallons or less
C. A spill of petroleum exceeding 25 gallons, or 25 gallons or less not
contained/cleaned up within 24 hours
D. Only spills that reach a waterway
5. Upon confirmation of a release during removal activities, what must
owners/operators/removal contractors do?
A. Notify EPA within 48 hours
, B. Within 20 days, submit a report to the state implementing agency
summarizing initial abatement steps and results
C. Immediately backfill the excavation
D. No action is required
6. What is the minimum time owners/operators must keep tank
closure letters?
A. 1 year
B. 3 years
C. 5 years
D. 7 years
7. What is the flash point range of diesel?
A. 73-100°F
B. 100-125°F
C. 126-205°F
D. Above 205°F
8. What is the flash point of pure ethanol?
A. 73°F
B. 100°F
C. 61.88°F
D. 140°F
9. Which class of liquids has a flash point less than 73°F and boiling
point greater than 100°F?
A. Class IA
B. Class IB
C. Class IC
D. Class II
10. Which of the following is an example of a Class II liquid (flash
point ≥100°F but <140°F)?
2026–2027 | Latest Comprehensive Practice Test Bank with
Verified Correct Answers | Complete ICC U2
Decommissioning Certification Study Guide, Exam Prep &
Success Bundle
THIS EXAM INCLUDES:
✔ Latest ICC U2 Decommissioning practice exam questions and answers
✔ Comprehensive coverage of decommissioning principles, procedures, and industry
standards
✔ Verified correct answers with detailed explanations and rationales
✔ Mock exam questions designed to simulate actual certification testing conditions
✔ Updated study materials aligned with current industry practices
✔ Ideal for certification preparation, workforce training, professional development,
and exam success
,UST Decommissioning & Regulations
1. How many days prior to a permanent closure must
owners/operators notify the state implementing agency?
A. 10 days
B. 20 days
C. 30 days
D. 60 days
2. Which entity requires notice for temporary closure of a UST?
A. EPA federal regulations
B. State implementing agencies
C. Local fire department
D. OSHA
3. What is the notice requirement for temporary closure when taking
the ICC decommissioning exam?
A. 24 hours
B. 30 days
C. 7 days
D. No notice is required
4. Which of the following must be reported within 24 hours?
A. Any spill of petroleum regardless of size
B. A spill of 10 gallons or less
C. A spill of petroleum exceeding 25 gallons, or 25 gallons or less not
contained/cleaned up within 24 hours
D. Only spills that reach a waterway
5. Upon confirmation of a release during removal activities, what must
owners/operators/removal contractors do?
A. Notify EPA within 48 hours
, B. Within 20 days, submit a report to the state implementing agency
summarizing initial abatement steps and results
C. Immediately backfill the excavation
D. No action is required
6. What is the minimum time owners/operators must keep tank
closure letters?
A. 1 year
B. 3 years
C. 5 years
D. 7 years
7. What is the flash point range of diesel?
A. 73-100°F
B. 100-125°F
C. 126-205°F
D. Above 205°F
8. What is the flash point of pure ethanol?
A. 73°F
B. 100°F
C. 61.88°F
D. 140°F
9. Which class of liquids has a flash point less than 73°F and boiling
point greater than 100°F?
A. Class IA
B. Class IB
C. Class IC
D. Class II
10. Which of the following is an example of a Class II liquid (flash
point ≥100°F but <140°F)?
