ARIZONA UNDERGROUND STORAGE TANK
(UST) OPERATOR EXAM — CLASS A
COMPLETE PRACTICE EXAM – 200 QUESTIONS
& VERIFIED SOLUTIONS WITH RATIONALE
University/Issuing Body: Arizona Department of Environmental Quality (ADEQ)
Course/Exam: Arizona Class A Underground Storage Tank (UST) Operator Certification
Examination
Professor/Examiner: ADEQ — Underground Storage Tank (UST) Program
Exam Format: Computer-Based | Approximately 100 Questions (Actual) / 200 Questions
(Practice) | Passing Score 80% | Open Book
Prerequisite: Designation by UST Facility Owner/Operator as Class A Operator
Reference Materials:
- Arizona Revised Statutes (A.R.S.) Title 49, Chapter 6 — Underground Storage Tanks
- Arizona Administrative Code (A.A.C.) Title 18, Chapter 12 — Underground Storage Tank
Regulations
- EPA 40 CFR Part 280 — Technical Standards and Corrective Action Requirements for Owners
and Operators of Underground Storage Tanks
- ADEQ UST Operator Training Program Materials
- NFPA 30 — Flammable and Combustible Liquids Code
📚 TABLE OF CONTENTS
| Section | Topic | Questions |
||-|--|
| 1 | Operator Roles, Responsibilities & Designation | 1–30 |
| 2 | UST System Components & Equipment | 31–50 |
| 3 | Release Detection & Monitoring | 51–75 |
| 4 | Spill Prevention, Overfill Protection & Corrosion Control | 76–100 |
| 5 | Reporting, Recordkeeping & Documentation | 101–125 |
| 6 | Tank Installation, Modification & Closure | 126–145 |
| 7 | Emergency Response & Release Reporting | 146–165 |
,| 8 | Financial Responsibility & Compliance | 166–180 |
| 9 | Inspections & Enforcement | 181–190 |
| 10 | Arizona Regulations & EPA Requirements | 191–200 |
SECTION 1: OPERATOR ROLES, RESPONSIBILITIES & DESIGNATION
Questions 1–30
QUESTION 1
According to Arizona law, which of the following best describes the primary responsibility of a
Class A Underground Storage Tank (UST) operator?
A) Responding to emergency alarms only
B) Conducting daily inspections of tank gauges
C) Ensuring overall regulatory compliance and documentation for the facility
D) Performing equipment repairs and maintenance tasks
Correct Answer: C — Ensuring overall regulatory compliance and documentation for the facility
Rationale: Class A operators are primarily responsible for ensuring the facility complies with all
regulatory requirements, including documentation and oversight of UST systems. They hold
primary management responsibility and decision-making authority for the operation,
maintenance, and recordkeeping of an underground storage tank facility.
QUESTION 2
A "Class A individual" is defined in Arizona Revised Statutes as a person designated by the
owner or operator as having:
A) Daily responsibility for initial response to alarms
B) Primary management responsibility or decision-making authority for UST facility operations
C) Responsibility for equipment repairs only
D) Responsibility for fuel delivery scheduling
Correct Answer: B — Primary management responsibility or decision-making authority for UST
facility operations
Rationale: Under A.R.S. § 49-1081, a "Class A individual" means a person designated by the
owner or operator as having primary management responsibility or decision-making authority for
the operation, maintenance and record keeping of an underground storage tank facility.
,QUESTION 3
How often must Class A UST operators in Arizona be retrained or recertified?
A) Every year
B) Every two years
C) Every three years
D) Every five years
Correct Answer: C — Every three years
Rationale: Arizona requires Class A and B operators to complete retraining and recertification
every three years (biennially).
QUESTION 4
What is the minimum passing score typically required for the Arizona Class A/B UST Operator
certification exam?
A) 60%
B) 70%
C) 75%
D) 80%
Correct Answer: D — 80%
Rationale: UST operator exams generally require a minimum score of 80% to pass and obtain
certification.
QUESTION 5
If the Arizona Department of Environmental Quality (ADEQ) finds that a storage tank system is
significantly out of compliance, what action is required regarding operator training?
A) The operator must pay a fine only
B) The Class A and Class B operator must be retrained and recertified
C) The facility must be immediately closed
D) No action is required
Correct Answer: B — The Class A and Class B operator must be retrained and recertified
Rationale: If the department finds that a storage tank system is significantly out of compliance,
the Class A and Class B operator must be retrained and recertified.
, QUESTION 6
Which of the following responsibilities is most closely associated with a Class B UST operator?
A) Strategic compliance planning
B) Daily operation, maintenance, and recordkeeping
C) Emergency response only
D) Financial auditing of UST facilities
Correct Answer: B — Daily operation, maintenance, and recordkeeping
Rationale: Class B operators are responsible for the day-to-day operational aspects, including
maintenance and recordkeeping of UST systems. They have daily responsibility for the
operation, maintenance and record keeping of an underground storage tank facility.
QUESTION 7
A "Class C individual" in Arizona is defined as having responsibility for:
A) Overall facility management and compliance
B) Daily responsibility for an initial response to alarms or indications of emergencies
C) Equipment installation and modification
D) Financial recordkeeping
Correct Answer: B — Daily responsibility for an initial response to alarms or indications of
emergencies
Rationale: Class C individuals have daily responsibility for an initial response to an alarm or
other indication of an emergency caused by a release or suspected release from an
underground storage tank.
QUESTION 8
Class A and B operators in Arizona must be trained within how many days of being designated
by the owner or operator?
A) 10 days
B) 15 days
C) 30 days
D) 60 days
Correct Answer: C — 30 days
Rationale: Class A and B individuals must be trained within thirty (30) days of being designated
by the owner or operator.
(UST) OPERATOR EXAM — CLASS A
COMPLETE PRACTICE EXAM – 200 QUESTIONS
& VERIFIED SOLUTIONS WITH RATIONALE
University/Issuing Body: Arizona Department of Environmental Quality (ADEQ)
Course/Exam: Arizona Class A Underground Storage Tank (UST) Operator Certification
Examination
Professor/Examiner: ADEQ — Underground Storage Tank (UST) Program
Exam Format: Computer-Based | Approximately 100 Questions (Actual) / 200 Questions
(Practice) | Passing Score 80% | Open Book
Prerequisite: Designation by UST Facility Owner/Operator as Class A Operator
Reference Materials:
- Arizona Revised Statutes (A.R.S.) Title 49, Chapter 6 — Underground Storage Tanks
- Arizona Administrative Code (A.A.C.) Title 18, Chapter 12 — Underground Storage Tank
Regulations
- EPA 40 CFR Part 280 — Technical Standards and Corrective Action Requirements for Owners
and Operators of Underground Storage Tanks
- ADEQ UST Operator Training Program Materials
- NFPA 30 — Flammable and Combustible Liquids Code
📚 TABLE OF CONTENTS
| Section | Topic | Questions |
||-|--|
| 1 | Operator Roles, Responsibilities & Designation | 1–30 |
| 2 | UST System Components & Equipment | 31–50 |
| 3 | Release Detection & Monitoring | 51–75 |
| 4 | Spill Prevention, Overfill Protection & Corrosion Control | 76–100 |
| 5 | Reporting, Recordkeeping & Documentation | 101–125 |
| 6 | Tank Installation, Modification & Closure | 126–145 |
| 7 | Emergency Response & Release Reporting | 146–165 |
,| 8 | Financial Responsibility & Compliance | 166–180 |
| 9 | Inspections & Enforcement | 181–190 |
| 10 | Arizona Regulations & EPA Requirements | 191–200 |
SECTION 1: OPERATOR ROLES, RESPONSIBILITIES & DESIGNATION
Questions 1–30
QUESTION 1
According to Arizona law, which of the following best describes the primary responsibility of a
Class A Underground Storage Tank (UST) operator?
A) Responding to emergency alarms only
B) Conducting daily inspections of tank gauges
C) Ensuring overall regulatory compliance and documentation for the facility
D) Performing equipment repairs and maintenance tasks
Correct Answer: C — Ensuring overall regulatory compliance and documentation for the facility
Rationale: Class A operators are primarily responsible for ensuring the facility complies with all
regulatory requirements, including documentation and oversight of UST systems. They hold
primary management responsibility and decision-making authority for the operation,
maintenance, and recordkeeping of an underground storage tank facility.
QUESTION 2
A "Class A individual" is defined in Arizona Revised Statutes as a person designated by the
owner or operator as having:
A) Daily responsibility for initial response to alarms
B) Primary management responsibility or decision-making authority for UST facility operations
C) Responsibility for equipment repairs only
D) Responsibility for fuel delivery scheduling
Correct Answer: B — Primary management responsibility or decision-making authority for UST
facility operations
Rationale: Under A.R.S. § 49-1081, a "Class A individual" means a person designated by the
owner or operator as having primary management responsibility or decision-making authority for
the operation, maintenance and record keeping of an underground storage tank facility.
,QUESTION 3
How often must Class A UST operators in Arizona be retrained or recertified?
A) Every year
B) Every two years
C) Every three years
D) Every five years
Correct Answer: C — Every three years
Rationale: Arizona requires Class A and B operators to complete retraining and recertification
every three years (biennially).
QUESTION 4
What is the minimum passing score typically required for the Arizona Class A/B UST Operator
certification exam?
A) 60%
B) 70%
C) 75%
D) 80%
Correct Answer: D — 80%
Rationale: UST operator exams generally require a minimum score of 80% to pass and obtain
certification.
QUESTION 5
If the Arizona Department of Environmental Quality (ADEQ) finds that a storage tank system is
significantly out of compliance, what action is required regarding operator training?
A) The operator must pay a fine only
B) The Class A and Class B operator must be retrained and recertified
C) The facility must be immediately closed
D) No action is required
Correct Answer: B — The Class A and Class B operator must be retrained and recertified
Rationale: If the department finds that a storage tank system is significantly out of compliance,
the Class A and Class B operator must be retrained and recertified.
, QUESTION 6
Which of the following responsibilities is most closely associated with a Class B UST operator?
A) Strategic compliance planning
B) Daily operation, maintenance, and recordkeeping
C) Emergency response only
D) Financial auditing of UST facilities
Correct Answer: B — Daily operation, maintenance, and recordkeeping
Rationale: Class B operators are responsible for the day-to-day operational aspects, including
maintenance and recordkeeping of UST systems. They have daily responsibility for the
operation, maintenance and record keeping of an underground storage tank facility.
QUESTION 7
A "Class C individual" in Arizona is defined as having responsibility for:
A) Overall facility management and compliance
B) Daily responsibility for an initial response to alarms or indications of emergencies
C) Equipment installation and modification
D) Financial recordkeeping
Correct Answer: B — Daily responsibility for an initial response to alarms or indications of
emergencies
Rationale: Class C individuals have daily responsibility for an initial response to an alarm or
other indication of an emergency caused by a release or suspected release from an
underground storage tank.
QUESTION 8
Class A and B operators in Arizona must be trained within how many days of being designated
by the owner or operator?
A) 10 days
B) 15 days
C) 30 days
D) 60 days
Correct Answer: C — 30 days
Rationale: Class A and B individuals must be trained within thirty (30) days of being designated
by the owner or operator.
