ICC U2 UST Decommissioning Exam Questions & Answers 2026–
2027 | Latest Actual Exam Questions with Verified Correct
Answers | Complete ICC Underground Storage Tank (UST)
Decommissioning Certification Study Guide, Practice Test Bank &
Exam Success Bundle
THIS EXAM INCLUDES:
✔ Comprehensive ICC U2 UST Decommissioning practice questions and answers
✔ Verified correct answers with detailed explanations and rationales
✔ Underground Storage Tank (UST) closure and decommissioning procedures
✔ Realistic exam-style multiple-choice questions designed to mirror certification testing formats
✔ Updated study material aligned with current industry standards and regulations
✔ Ideal for contractors, inspectors, environmental professionals, operators, and certification
candidates
✔ Comprehensive review of key concepts commonly tested on the ICC U2 UST Decommissioning
examination
,UST Decommissioning
1.1. Underground storage systems are no longer needed or suitable for
product storage must be properly disposed of:
• A. Gas
• B. Oil
• C. Petroleum
• D. All of the above
Answer: C
2.2. All work that is completed at the site must be accomplished in
accordance with federal, state, and local requirements as well as accepted
safety standards.
• A. True
• B. False
Answer: True
3.3. All applicable permits must be obtained prior to beginning any work.
• A. True
• B. False
Answer: True
4.4. What are three hazards that removers of petroleum tanks are faced
with, such as petroleum hydrocarbon liquids, vapor, or waste?
Answer: (Any three) Fire/explosion, health hazards (inhalation/absorption),
environmental contamination, oxygen displacement, asphyxiation.
5.5. What are three symptoms of inhaling or absorbing high levels of
petroleum hydrocarbon vapors?
Answer: Dizziness, excitement, unconsciousness.
,6.6. Artificial respiration should be applied if:
• A. They hit their head
• B. They can't see
• C. They have stopped breathing
• D. They suffer from cardiac arrest
Answer: C
7.7. What three parts of the body should petroleum liquids be kept away
from?
Answer: Eyes, skin, mouth.
8. High occupational exposures to benzene have been associated with
various human blood disorders.
• A. True
• B. False
Answer: True
9. Smoking materials or any flammable materials must be removed from
the job site in order to prevent:
• A. People from smoking
• B. Sudden combustion
• C. Second hand smoke
• D. Explosions inside of tanks due to large amounts of vapor
• E. B and D
Answer: E
10. What tool with the abbreviation CGI should be used to check for
hazardous vapor concentrations?
Answer: Combustible Gas Indicator
, 11. All tools that are in areas with hazardous vapor concentrations should
be shut down or they should be _____ proof.
Answer: Explosion
12. Underground storage tanks are considered temporarily out of service if
they are idle but will return to service in ___ years.
Answer: 1
13. Underground storage tanks are considered temporarily out of service if
they are:
• A. Idle but will return to service within one year
• B. Are awaiting abandonment in place
• C. Are waiting for removal
• D. All of the above
Answer: D
14. Tanks that are out of service must be:
• A. Checked routinely
• B. Properly secured
• C. Filled with sand
• D. A and B
Answer: D (A and B)
15. When removing an underground tank, what method for removal is
preferred?
Answer: Removal of the tank (complete extraction).
16. Choose the reasons that a closure in place would be preferred over a
removal:
• A. Because of the tank location, adjacent equipment or structures may
be damaged or weakened
2027 | Latest Actual Exam Questions with Verified Correct
Answers | Complete ICC Underground Storage Tank (UST)
Decommissioning Certification Study Guide, Practice Test Bank &
Exam Success Bundle
THIS EXAM INCLUDES:
✔ Comprehensive ICC U2 UST Decommissioning practice questions and answers
✔ Verified correct answers with detailed explanations and rationales
✔ Underground Storage Tank (UST) closure and decommissioning procedures
✔ Realistic exam-style multiple-choice questions designed to mirror certification testing formats
✔ Updated study material aligned with current industry standards and regulations
✔ Ideal for contractors, inspectors, environmental professionals, operators, and certification
candidates
✔ Comprehensive review of key concepts commonly tested on the ICC U2 UST Decommissioning
examination
,UST Decommissioning
1.1. Underground storage systems are no longer needed or suitable for
product storage must be properly disposed of:
• A. Gas
• B. Oil
• C. Petroleum
• D. All of the above
Answer: C
2.2. All work that is completed at the site must be accomplished in
accordance with federal, state, and local requirements as well as accepted
safety standards.
• A. True
• B. False
Answer: True
3.3. All applicable permits must be obtained prior to beginning any work.
• A. True
• B. False
Answer: True
4.4. What are three hazards that removers of petroleum tanks are faced
with, such as petroleum hydrocarbon liquids, vapor, or waste?
Answer: (Any three) Fire/explosion, health hazards (inhalation/absorption),
environmental contamination, oxygen displacement, asphyxiation.
5.5. What are three symptoms of inhaling or absorbing high levels of
petroleum hydrocarbon vapors?
Answer: Dizziness, excitement, unconsciousness.
,6.6. Artificial respiration should be applied if:
• A. They hit their head
• B. They can't see
• C. They have stopped breathing
• D. They suffer from cardiac arrest
Answer: C
7.7. What three parts of the body should petroleum liquids be kept away
from?
Answer: Eyes, skin, mouth.
8. High occupational exposures to benzene have been associated with
various human blood disorders.
• A. True
• B. False
Answer: True
9. Smoking materials or any flammable materials must be removed from
the job site in order to prevent:
• A. People from smoking
• B. Sudden combustion
• C. Second hand smoke
• D. Explosions inside of tanks due to large amounts of vapor
• E. B and D
Answer: E
10. What tool with the abbreviation CGI should be used to check for
hazardous vapor concentrations?
Answer: Combustible Gas Indicator
, 11. All tools that are in areas with hazardous vapor concentrations should
be shut down or they should be _____ proof.
Answer: Explosion
12. Underground storage tanks are considered temporarily out of service if
they are idle but will return to service in ___ years.
Answer: 1
13. Underground storage tanks are considered temporarily out of service if
they are:
• A. Idle but will return to service within one year
• B. Are awaiting abandonment in place
• C. Are waiting for removal
• D. All of the above
Answer: D
14. Tanks that are out of service must be:
• A. Checked routinely
• B. Properly secured
• C. Filled with sand
• D. A and B
Answer: D (A and B)
15. When removing an underground tank, what method for removal is
preferred?
Answer: Removal of the tank (complete extraction).
16. Choose the reasons that a closure in place would be preferred over a
removal:
• A. Because of the tank location, adjacent equipment or structures may
be damaged or weakened
