ICC U2 UST DECOMMISSIONING Actual Exam |
Official Exam – Complete Q&A with Rationales –
Pass Guaranteed - A+ Graded
Total Questions: 50 | Time: 90 min | Pass: 80%
TABLE OF CONTENTS
Section 1 | Regulatory Framework & Compliance | Q1 – Q10
Section 2 | Site Assessment & Closure Requirements | Q11 – Q20
Section 3 | Decommissioning Methods & Procedures | Q21 – Q30
Section 4 | Sampling, Testing & Documentation | Q31 – Q40
Section 5 | Health, Safety & Environmental Protection | Q41 – Q50
Instructions: Choose the single best answer. Pass: 40 correct in 90 minutes.
══════════════════════════════════════
SECTION 1: REGULATORY FRAMEWORK & COMPLIANCE Q1 – Q10
══════════════════════════════════════
Question 1 of 50
A 1982 gas station with two 10,000-gallon steel USTs is being permanently closed. The
owner hired a contractor who started excavation before notifying the local fire marshal.
A. The owner may notify the fire marshal within 48 hours after work begins
B. The owner must notify the local agency at least 30 days before decommissioning
begins ✓ CORRECT
C. Notification is only required if the tanks contained hazardous substances
D. The contractor can submit the notification on behalf of the owner after starting work
Correct Answer: B
Rationale: Federal and state UST regulations require advance notification to the local
implementing agency before permanent closure activities begin. Starting work without
notification can result in enforcement action and invalidates the closure process. The
,30-day requirement gives the agency time to review plans and schedule any necessary
inspections.
Question 2 of 50
During a UST closure, the contractor discovers a small release in the piping sump. The
owner asks if this needs to be reported since the tank is already being
decommissioned.
A. Releases during decommissioning are exempt from reporting if less than 25 gallons
B. The contractor should document the release in the closure report but need not notify
the state
C. Any release discovered during decommissioning must be reported to the regulatory
authority immediately ✓ CORRECT
D. Only releases that impact groundwater require reporting during closure activities
Correct Answer: C
Rationale: Any release discovered during decommissioning must be reported to the
regulatory authority regardless of the tank's operational status. The owner cannot avoid
reporting by claiming the tank is already being closed. Prompt reporting triggers proper
assessment and prevents further environmental damage.
Question 3 of 50
A convenience store owner wants to permanently close a 1990 fiberglass UST by filling
it with sand. The local agency inspector notes the tank lacks corrosion protection
documentation.
A. Fiberglass tanks are exempt from all corrosion protection requirements
B. The tank may be closed in place without documentation if it passes a tightness test
C. Sand filling is prohibited for tanks installed before 1990
D. The owner must demonstrate compliance with applicable corrosion protection
requirements before permanent closure ✓ CORRECT
, Correct Answer: D
Rationale: Corrosion protection requirements apply to UST systems regardless of the
tank material or closure method. The owner must provide documentation or evidence
that the tank system met applicable corrosion protection standards. Sand filling alone
does not satisfy regulatory closure requirements.
Question 4 of 50
An environmental consultant is reviewing records for a 1975 steel UST system before
decommissioning. The owner cannot find the original installation records or corrosion
protection design specifications.
A. The consultant should conduct a site assessment and gather available evidence to
demonstrate compliance to the extent possible ✓ CORRECT
B. Tanks installed before 1988 are automatically grandfathered and require no
documentation
C. Missing records mean the tank cannot be decommissioned and must remain in
service
D. The owner can simply sign an affidavit stating the tank was properly installed
Correct Answer: A
Rationale: When original records are unavailable, the consultant must work with what
evidence exists and conduct appropriate assessments to demonstrate compliance to
the regulator. Complete documentation is ideal but its absence does not automatically
prevent decommissioning. The regulatory agency will evaluate the available information
and may require additional site characterization.
Question 5 of 50
A contractor arrives at a former service station to remove two 8,000-gallon USTs. The
owner has not obtained the required local permits for excavation in the public
right-of-way.
Official Exam – Complete Q&A with Rationales –
Pass Guaranteed - A+ Graded
Total Questions: 50 | Time: 90 min | Pass: 80%
TABLE OF CONTENTS
Section 1 | Regulatory Framework & Compliance | Q1 – Q10
Section 2 | Site Assessment & Closure Requirements | Q11 – Q20
Section 3 | Decommissioning Methods & Procedures | Q21 – Q30
Section 4 | Sampling, Testing & Documentation | Q31 – Q40
Section 5 | Health, Safety & Environmental Protection | Q41 – Q50
Instructions: Choose the single best answer. Pass: 40 correct in 90 minutes.
══════════════════════════════════════
SECTION 1: REGULATORY FRAMEWORK & COMPLIANCE Q1 – Q10
══════════════════════════════════════
Question 1 of 50
A 1982 gas station with two 10,000-gallon steel USTs is being permanently closed. The
owner hired a contractor who started excavation before notifying the local fire marshal.
A. The owner may notify the fire marshal within 48 hours after work begins
B. The owner must notify the local agency at least 30 days before decommissioning
begins ✓ CORRECT
C. Notification is only required if the tanks contained hazardous substances
D. The contractor can submit the notification on behalf of the owner after starting work
Correct Answer: B
Rationale: Federal and state UST regulations require advance notification to the local
implementing agency before permanent closure activities begin. Starting work without
notification can result in enforcement action and invalidates the closure process. The
,30-day requirement gives the agency time to review plans and schedule any necessary
inspections.
Question 2 of 50
During a UST closure, the contractor discovers a small release in the piping sump. The
owner asks if this needs to be reported since the tank is already being
decommissioned.
A. Releases during decommissioning are exempt from reporting if less than 25 gallons
B. The contractor should document the release in the closure report but need not notify
the state
C. Any release discovered during decommissioning must be reported to the regulatory
authority immediately ✓ CORRECT
D. Only releases that impact groundwater require reporting during closure activities
Correct Answer: C
Rationale: Any release discovered during decommissioning must be reported to the
regulatory authority regardless of the tank's operational status. The owner cannot avoid
reporting by claiming the tank is already being closed. Prompt reporting triggers proper
assessment and prevents further environmental damage.
Question 3 of 50
A convenience store owner wants to permanently close a 1990 fiberglass UST by filling
it with sand. The local agency inspector notes the tank lacks corrosion protection
documentation.
A. Fiberglass tanks are exempt from all corrosion protection requirements
B. The tank may be closed in place without documentation if it passes a tightness test
C. Sand filling is prohibited for tanks installed before 1990
D. The owner must demonstrate compliance with applicable corrosion protection
requirements before permanent closure ✓ CORRECT
, Correct Answer: D
Rationale: Corrosion protection requirements apply to UST systems regardless of the
tank material or closure method. The owner must provide documentation or evidence
that the tank system met applicable corrosion protection standards. Sand filling alone
does not satisfy regulatory closure requirements.
Question 4 of 50
An environmental consultant is reviewing records for a 1975 steel UST system before
decommissioning. The owner cannot find the original installation records or corrosion
protection design specifications.
A. The consultant should conduct a site assessment and gather available evidence to
demonstrate compliance to the extent possible ✓ CORRECT
B. Tanks installed before 1988 are automatically grandfathered and require no
documentation
C. Missing records mean the tank cannot be decommissioned and must remain in
service
D. The owner can simply sign an affidavit stating the tank was properly installed
Correct Answer: A
Rationale: When original records are unavailable, the consultant must work with what
evidence exists and conduct appropriate assessments to demonstrate compliance to
the regulator. Complete documentation is ideal but its absence does not automatically
prevent decommissioning. The regulatory agency will evaluate the available information
and may require additional site characterization.
Question 5 of 50
A contractor arrives at a former service station to remove two 8,000-gallon USTs. The
owner has not obtained the required local permits for excavation in the public
right-of-way.
