Arizona Class C UST Operator Exam
Prep: Practice Questions & Answers
1. What is the primary responsibility of a Class C Underground Storage
Tank (UST) operator in Arizona?
A. Maintaining compliance documentation
B. Overseeing daily tank operations
C. Managing financial responsibility requirements
D. Responding to emergencies such as spills or alarms ✓
Rationale: The Class C operator is specifically responsible for initiating
emergency response actions when alarms, spills, or releases occur at a UST
facility. They are the front-line personnel who work directly at the fueling
location and must recognize hazards and respond appropriately .
2. Which of the following best describes the role of a Class A UST
operator?
A. First responder to emergencies
B. Conducting daily inspections
C. Ensuring overall compliance with regulations ✓
D. Monitoring fuel dispensing
Rationale: Class A operators are responsible for overall regulatory
compliance and ensuring the facility meets legal requirements. They have
,the primary responsibility of assuring the regulated facility meets
compliance and documentation requirements set by law .
3. A Class C operator must be trained to take action when which of the
following occurs?
A. Routine maintenance schedules
B. Inventory reconciliation
C. Alarm indicating a possible leak ✓
D. Monthly reporting deadlines
Rationale: Class C operators must recognize alarms and respond
immediately to potential leaks or emergencies. Their primary duty involves
initial response procedures to an alarm or other indication of an emergency
caused by a release or suspected release .
4. Which training requirement applies to Class C operators in Arizona?
A. Must pass a state exam only
B. Must complete a 2-year apprenticeship
training or be trained by C. Must complete a Class A/B operator ✓
D. No training is required
Rationale: Class C operators can be trained by certified Class A or B
operators or through an approved program. According to Arizona law,
Class C individuals must be trained prior to assuming the role .
,5. What is the first action a Class C operator should take upon
discovering a fuel spill?
A. Ignore it if small
B. Record it later
C. Call a supervisor only
D. Initiate spill response procedures immediately ✓
Rationale: Immediate response is required to contain spills and prevent
environmental damage. The Class C operator must follow the facility's
established emergency response plan and notify designated personnel .
6. Which equipment is most critical for a Class C operator during a spill
response?
A. Measuring tape
B. Calculator
C. Spill kit and absorbent materials ✓
D. Computer system
Rationale: Spill kits and absorbent materials are essential for containing
and cleaning up fuel spills, preventing fuel from reaching drains or soil and
causing environmental contamination .
7. Which of the following is NOT a Class C responsibility?
, A. Responding to alarms
B. Managing emergencies
C. Maintaining regulatory compliance records ✓
D. Using spill kits
Rationale: Regulatory compliance is primarily a Class A responsibility. Class
C operators focus on operational and safety issues such as tank monitor
alarms, spill bucket leaks, and release detection equipment alarms that
require immediate response .
8. Who must a Class C operator contact when a suspected release is
discovered?
A. The local fire department only
B. A Class A or Class B operator and any emergency responder ✓
C. The Arizona Department of Environmental Quality (ADEQ) directly
D. The facility's legal department
Rationale: According to ARS § 49-1083(F)(3), Class C training must include
procedures for contacting a Class A or Class B individual and any
emergency responder. The Class C operator is not expected to make direct
notifications to ADEQ .
9. According to Arizona regulations, how often must Class C operators
receive refresher training?
A. Every year
Prep: Practice Questions & Answers
1. What is the primary responsibility of a Class C Underground Storage
Tank (UST) operator in Arizona?
A. Maintaining compliance documentation
B. Overseeing daily tank operations
C. Managing financial responsibility requirements
D. Responding to emergencies such as spills or alarms ✓
Rationale: The Class C operator is specifically responsible for initiating
emergency response actions when alarms, spills, or releases occur at a UST
facility. They are the front-line personnel who work directly at the fueling
location and must recognize hazards and respond appropriately .
2. Which of the following best describes the role of a Class A UST
operator?
A. First responder to emergencies
B. Conducting daily inspections
C. Ensuring overall compliance with regulations ✓
D. Monitoring fuel dispensing
Rationale: Class A operators are responsible for overall regulatory
compliance and ensuring the facility meets legal requirements. They have
,the primary responsibility of assuring the regulated facility meets
compliance and documentation requirements set by law .
3. A Class C operator must be trained to take action when which of the
following occurs?
A. Routine maintenance schedules
B. Inventory reconciliation
C. Alarm indicating a possible leak ✓
D. Monthly reporting deadlines
Rationale: Class C operators must recognize alarms and respond
immediately to potential leaks or emergencies. Their primary duty involves
initial response procedures to an alarm or other indication of an emergency
caused by a release or suspected release .
4. Which training requirement applies to Class C operators in Arizona?
A. Must pass a state exam only
B. Must complete a 2-year apprenticeship
training or be trained by C. Must complete a Class A/B operator ✓
D. No training is required
Rationale: Class C operators can be trained by certified Class A or B
operators or through an approved program. According to Arizona law,
Class C individuals must be trained prior to assuming the role .
,5. What is the first action a Class C operator should take upon
discovering a fuel spill?
A. Ignore it if small
B. Record it later
C. Call a supervisor only
D. Initiate spill response procedures immediately ✓
Rationale: Immediate response is required to contain spills and prevent
environmental damage. The Class C operator must follow the facility's
established emergency response plan and notify designated personnel .
6. Which equipment is most critical for a Class C operator during a spill
response?
A. Measuring tape
B. Calculator
C. Spill kit and absorbent materials ✓
D. Computer system
Rationale: Spill kits and absorbent materials are essential for containing
and cleaning up fuel spills, preventing fuel from reaching drains or soil and
causing environmental contamination .
7. Which of the following is NOT a Class C responsibility?
, A. Responding to alarms
B. Managing emergencies
C. Maintaining regulatory compliance records ✓
D. Using spill kits
Rationale: Regulatory compliance is primarily a Class A responsibility. Class
C operators focus on operational and safety issues such as tank monitor
alarms, spill bucket leaks, and release detection equipment alarms that
require immediate response .
8. Who must a Class C operator contact when a suspected release is
discovered?
A. The local fire department only
B. A Class A or Class B operator and any emergency responder ✓
C. The Arizona Department of Environmental Quality (ADEQ) directly
D. The facility's legal department
Rationale: According to ARS § 49-1083(F)(3), Class C training must include
procedures for contacting a Class A or Class B individual and any
emergency responder. The Class C operator is not expected to make direct
notifications to ADEQ .
9. According to Arizona regulations, how often must Class C operators
receive refresher training?
A. Every year
