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Arizona Underground Storage Tank Operator Exam (Class B)
EXAM QUESTIONS AND CORRECT VERIFIED SOLUTIONS LATEST
UPDATE THIS YEAR – JUST RELEASED
Arizona Underground Storage Tank Operator Exam (Class B)
EXAM COVERAGE OVERVIEW (10 Key Points)
1. Class B Operator Role: A Class B Operator has day-to-day responsibility for
implementing regulatory requirements, overseeing operation, maintenance, and
recordkeeping of UST systems.
2. Certification Validity: Class A and B certifications must be renewed every 3 years.
Training records must be maintained for at least 3 years and be available for ADEQ
inspection.
3. Retraining Trigger: If ADEQ finds a UST system significantly out of compliance, the Class
A and B operators must be retrained and recertified.
4. Training Deadline: Class A and B individuals must complete training within 30 days of
being designated by the owner or operator. Class C operators must complete
training before assuming the role.
5. Regulatory Basis: The exam is based on 40 CFR 280, Arizona Administrative Code
(A.A.C. R18-12), and ARS § 49-1083.
6. Service Provider Certification: Work categories such as installation, cathodic protection
testing, interior lining, tightness testing, and decommissioning must be performed by
ADEQ-certified service providers.
7. Corrosion Protection: Impressed current systems require rectifier readings every 60
days. The minimum acceptable CP potential for steel is -0.85V (Cu/CuSO₄).
8. Spill/Overfill Prevention: Spill bucket failures must be repaired within 14
days. Automatic shutoff devices must shut off flow when the tank is 95% full.
9. Release Detection: ATG systems monitor product levels and detect leaks. Interstitial
monitoring and vapor/groundwater monitoring are also approved methods.
10. Reporting: Any confirmed release must be reported to ADEQ within 24 hours.
SECTION 1: OPERATOR ROLES AND RESPONSIBILITIES (Questions 1-35)
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1. According to Arizona regulations, which operator class has day-to-day responsibility for
implementing applicable UST regulatory requirements and overseeing operation,
maintenance, and recordkeeping?
A) Class A Operator
B) Class B Operator
C) Class C Operator
D) Class D Operator
Answer: B) Class B Operator
Rationale: A Class B Operator is responsible for the daily implementation of UST regulatory
requirements, focusing on operational, maintenance, and recordkeeping tasks. Class A handles
broad compliance oversight, while Class C responds to emergencies.
2. Class A and Class B UST operator certifications in Arizona must be renewed every:
A) 2 years
B) 3 years
C) 5 years
D) 10 years
Answer: B) 3 years
Rationale: ADEQ requires Class A and Class B operator certifications to be retrained and
recertified every three years. Class C training must be renewed annually or upon change of
personnel.
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3. Who must be present at the facility during operating hours to respond to alarms or
emergencies?
A) Class A Operator
B) Class B Operator
C) Class C Operator
D) Both A and B
Answer: C) Class C Operator
Rationale: The Class C Operator is the designated individual (often an employee) who can
respond to alarms, spills, or emergencies. They are not required to have the same level of
technical knowledge as A or B operators but must know initial response procedures.
4. Under Arizona rules, how many Class C operators must be designated per facility?
A) At least one per shift
B) Only one total
C) One per tank
D) None if Class B is on-site
Answer: A) At least one per shift
Rationale: Each facility must have at least one Class C operator for each operating shift to
ensure immediate emergency response capability.
5. The Arizona UST operator classification system is based on which federal regulation?
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A) EPA's 2015 Underground Storage Tank regulation
B) Clean Air Act
C) Safe Drinking Water Act
D) Resource Conservation and Recovery Act
Answer: A) EPA's 2015 Underground Storage Tank regulation
Rationale: The Arizona UST operator classification system is based on the EPA's 2015
underground storage tank regulation, which established the three-tiered operator training
framework.
6. What is the maximum time allowed for a Class A or B operator to complete training after
being designated?
A) 15 days
B) 30 days
C) 45 days
D) 60 days
Answer: B) 30 days
Rationale: Class A and B individuals must be trained within 30 days of being designated by the
owner or operator.
7. According to ARS § 49-1083, which Arizona statute sections are included in Class B operator
training?
Arizona Underground Storage Tank Operator Exam (Class B)
EXAM QUESTIONS AND CORRECT VERIFIED SOLUTIONS LATEST
UPDATE THIS YEAR – JUST RELEASED
Arizona Underground Storage Tank Operator Exam (Class B)
EXAM COVERAGE OVERVIEW (10 Key Points)
1. Class B Operator Role: A Class B Operator has day-to-day responsibility for
implementing regulatory requirements, overseeing operation, maintenance, and
recordkeeping of UST systems.
2. Certification Validity: Class A and B certifications must be renewed every 3 years.
Training records must be maintained for at least 3 years and be available for ADEQ
inspection.
3. Retraining Trigger: If ADEQ finds a UST system significantly out of compliance, the Class
A and B operators must be retrained and recertified.
4. Training Deadline: Class A and B individuals must complete training within 30 days of
being designated by the owner or operator. Class C operators must complete
training before assuming the role.
5. Regulatory Basis: The exam is based on 40 CFR 280, Arizona Administrative Code
(A.A.C. R18-12), and ARS § 49-1083.
6. Service Provider Certification: Work categories such as installation, cathodic protection
testing, interior lining, tightness testing, and decommissioning must be performed by
ADEQ-certified service providers.
7. Corrosion Protection: Impressed current systems require rectifier readings every 60
days. The minimum acceptable CP potential for steel is -0.85V (Cu/CuSO₄).
8. Spill/Overfill Prevention: Spill bucket failures must be repaired within 14
days. Automatic shutoff devices must shut off flow when the tank is 95% full.
9. Release Detection: ATG systems monitor product levels and detect leaks. Interstitial
monitoring and vapor/groundwater monitoring are also approved methods.
10. Reporting: Any confirmed release must be reported to ADEQ within 24 hours.
SECTION 1: OPERATOR ROLES AND RESPONSIBILITIES (Questions 1-35)
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1. According to Arizona regulations, which operator class has day-to-day responsibility for
implementing applicable UST regulatory requirements and overseeing operation,
maintenance, and recordkeeping?
A) Class A Operator
B) Class B Operator
C) Class C Operator
D) Class D Operator
Answer: B) Class B Operator
Rationale: A Class B Operator is responsible for the daily implementation of UST regulatory
requirements, focusing on operational, maintenance, and recordkeeping tasks. Class A handles
broad compliance oversight, while Class C responds to emergencies.
2. Class A and Class B UST operator certifications in Arizona must be renewed every:
A) 2 years
B) 3 years
C) 5 years
D) 10 years
Answer: B) 3 years
Rationale: ADEQ requires Class A and Class B operator certifications to be retrained and
recertified every three years. Class C training must be renewed annually or upon change of
personnel.
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3. Who must be present at the facility during operating hours to respond to alarms or
emergencies?
A) Class A Operator
B) Class B Operator
C) Class C Operator
D) Both A and B
Answer: C) Class C Operator
Rationale: The Class C Operator is the designated individual (often an employee) who can
respond to alarms, spills, or emergencies. They are not required to have the same level of
technical knowledge as A or B operators but must know initial response procedures.
4. Under Arizona rules, how many Class C operators must be designated per facility?
A) At least one per shift
B) Only one total
C) One per tank
D) None if Class B is on-site
Answer: A) At least one per shift
Rationale: Each facility must have at least one Class C operator for each operating shift to
ensure immediate emergency response capability.
5. The Arizona UST operator classification system is based on which federal regulation?
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A) EPA's 2015 Underground Storage Tank regulation
B) Clean Air Act
C) Safe Drinking Water Act
D) Resource Conservation and Recovery Act
Answer: A) EPA's 2015 Underground Storage Tank regulation
Rationale: The Arizona UST operator classification system is based on the EPA's 2015
underground storage tank regulation, which established the three-tiered operator training
framework.
6. What is the maximum time allowed for a Class A or B operator to complete training after
being designated?
A) 15 days
B) 30 days
C) 45 days
D) 60 days
Answer: B) 30 days
Rationale: Class A and B individuals must be trained within 30 days of being designated by the
owner or operator.
7. According to ARS § 49-1083, which Arizona statute sections are included in Class B operator
training?
