ICC U2 UST DECOMMISSIONING EXAM TEST BANK
ACTUAL 2026/2027 HIGH YIELD PRACTICE QUESTIONS
AND STUDY GUIDE ACCURATE EXAM COMPLETE REAL
QUESTIONS AND CORRECT DETAILED SOLUTIONS
WITH RATIONALES (100% CORRECT VERIFIED
ANSWERS) CURRENTLY UPDATED VERSION 2026
EDITION |GUARANTEED PASS A+ |JUST RELEASED ICC
U2 UST DECOMMISSIONING EXAM |INSTANT
DOWNLOAD PDF
1. Owners/operators must notify the state implementing agency how
many days prior to a permanent closure?
A) 15 days
B) 30 days — CORRECT ANSWER
C) 45 days
D) 60 days
Rationale: The EPA 40 CFR Part 280.71 requires owners and
operators to provide at least 30 days' notice before beginning
permanent closure or a change-in-service. Additionally, a 24-hour
verbal notice is required prior to breaking concrete for tank removal.
2. What is the specific federal regulation governing underground
storage tanks?
A) Clean Water Act, Section 404
B) Safe Drinking Water Act, Subtitle A
,C) Resource Conservation and Recovery Act (RCRA), Subtitle I —
CORRECT ANSWER
D) Comprehensive Environmental Response, Compensation, and
Liability Act (CERCLA)
Rationale: The RCRA Subtitle I is the federal law that governs
underground storage tanks. This statute was established to prevent,
detect, and clean up releases from UST systems.
3. An Underground Storage Tank (UST) that has been out of service
for more than 12 months must be:
A) Temporarily closed with monitoring continued
B) Permanently closed — CORRECT ANSWER
C) Exempt from closure requirements
D) Converted to above-ground storage
Rationale: Any UST that was in use on or after December 22, 1988,
must be permanently closed if taken out of use for more than a 12-
month period and does not meet standards for new UST systems or
upgrade requirements.
4. For a tank placed in temporary closure for 3 months or more,
owners and operators must:
A) Remove the tank immediately
,B) Leave vent lines open and functioning, and cap all other lines —
CORRECT ANSWER
C) Fill the tank with sand
D) Continue leak detection monitoring
Rationale: During temporary closure, vent lines must remain open
and functioning, and all other lines must be capped or plugged.
Corrosion protection and leak detection are not required if the tank is
empty.
5. Underground petroleum storage systems that are no longer needed
or suitable for product storage must be properly ______.
A) Removed from the site
B) Decommissioned and disposed of properly — CORRECT
ANSWER
C) Sold as used equipment
D) Left in place without treatment
Rationale: When USTs are no longer needed, they must be properly
decommissioned (closed) by either removal from the ground or
closure in place, following all regulatory requirements under API
1604 and 40 CFR Part 280.
, 6. All work that is completed at the site must be accomplished in
accordance with:
A) Federal requirements only
B) State requirements only
C) Federal, state, and local requirements as well as accepted safety
standards — CORRECT ANSWER
D) The owner's preferences
Rationale: All decommissioning work must comply with federal,
state, and local regulations along with accepted safety standards to
ensure legal compliance and worker protection.
7. A written report submitted to the local agency after an
unauthorized release is required to include all of the following
EXCEPT:
A) Description of actions taken to stop the release
B) Cause of the release — CORRECT ANSWER
C) Method of disposal of released product
D) Date on which the release was discovered
Rationale: The cause of the release is not required to be included in
the initial written report to the local agency under CCR Title 23, Sec
2652(c).
ACTUAL 2026/2027 HIGH YIELD PRACTICE QUESTIONS
AND STUDY GUIDE ACCURATE EXAM COMPLETE REAL
QUESTIONS AND CORRECT DETAILED SOLUTIONS
WITH RATIONALES (100% CORRECT VERIFIED
ANSWERS) CURRENTLY UPDATED VERSION 2026
EDITION |GUARANTEED PASS A+ |JUST RELEASED ICC
U2 UST DECOMMISSIONING EXAM |INSTANT
DOWNLOAD PDF
1. Owners/operators must notify the state implementing agency how
many days prior to a permanent closure?
A) 15 days
B) 30 days — CORRECT ANSWER
C) 45 days
D) 60 days
Rationale: The EPA 40 CFR Part 280.71 requires owners and
operators to provide at least 30 days' notice before beginning
permanent closure or a change-in-service. Additionally, a 24-hour
verbal notice is required prior to breaking concrete for tank removal.
2. What is the specific federal regulation governing underground
storage tanks?
A) Clean Water Act, Section 404
B) Safe Drinking Water Act, Subtitle A
,C) Resource Conservation and Recovery Act (RCRA), Subtitle I —
CORRECT ANSWER
D) Comprehensive Environmental Response, Compensation, and
Liability Act (CERCLA)
Rationale: The RCRA Subtitle I is the federal law that governs
underground storage tanks. This statute was established to prevent,
detect, and clean up releases from UST systems.
3. An Underground Storage Tank (UST) that has been out of service
for more than 12 months must be:
A) Temporarily closed with monitoring continued
B) Permanently closed — CORRECT ANSWER
C) Exempt from closure requirements
D) Converted to above-ground storage
Rationale: Any UST that was in use on or after December 22, 1988,
must be permanently closed if taken out of use for more than a 12-
month period and does not meet standards for new UST systems or
upgrade requirements.
4. For a tank placed in temporary closure for 3 months or more,
owners and operators must:
A) Remove the tank immediately
,B) Leave vent lines open and functioning, and cap all other lines —
CORRECT ANSWER
C) Fill the tank with sand
D) Continue leak detection monitoring
Rationale: During temporary closure, vent lines must remain open
and functioning, and all other lines must be capped or plugged.
Corrosion protection and leak detection are not required if the tank is
empty.
5. Underground petroleum storage systems that are no longer needed
or suitable for product storage must be properly ______.
A) Removed from the site
B) Decommissioned and disposed of properly — CORRECT
ANSWER
C) Sold as used equipment
D) Left in place without treatment
Rationale: When USTs are no longer needed, they must be properly
decommissioned (closed) by either removal from the ground or
closure in place, following all regulatory requirements under API
1604 and 40 CFR Part 280.
, 6. All work that is completed at the site must be accomplished in
accordance with:
A) Federal requirements only
B) State requirements only
C) Federal, state, and local requirements as well as accepted safety
standards — CORRECT ANSWER
D) The owner's preferences
Rationale: All decommissioning work must comply with federal,
state, and local regulations along with accepted safety standards to
ensure legal compliance and worker protection.
7. A written report submitted to the local agency after an
unauthorized release is required to include all of the following
EXCEPT:
A) Description of actions taken to stop the release
B) Cause of the release — CORRECT ANSWER
C) Method of disposal of released product
D) Date on which the release was discovered
Rationale: The cause of the release is not required to be included in
the initial written report to the local agency under CCR Title 23, Sec
2652(c).
