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WISCONSIN UNDERGROUND STORAGE TANK (UST)
OPERATOR EXAM 2026/2027 COMPLETE (100) CURRENT
TESTING QUESTIONS AND CORRECT ANSWERS WITH
DETAILED RATIONALES.
(UST)
Prepare for the Wisconsin Underground Storage Tank Operator Exam Practice with a
focused study resource designed to reinforce essential UST operation and compliance
concepts. It supports review of UST systems, operating requirements, release
detection, recordkeeping, release reporting and confirmation, energy-related
requirements, and corrective actions. Use the material to strengthen regulatory
knowledge, improve practical decision-making, and identify areas that may require
additional review before the examination. This resource is best suited for Wisconsin
Class A and Class B UST operators, facility managers, environmental professionals,
and candidates preparing for Wisconsin underground storage tank operator
certification.
MULTIPLE CHOICE.
SECTION 1: REGULATORY FRAMEWORK AND ADMINISTRATION (Questions
1–15)
Question 1:
Which Wisconsin Administrative Code chapter governs the regulations for
flammable, combustible, and hazardous liquids in storage tanks?
A) NR 420
B) SPS 305
C) ATCP 93
D) COMM 10
Answer: C) ATCP 93
Rationale: Wisconsin Administrative Code Chapter ATCP 93 governs the
regulations for flammable, combustible, and hazardous liquids in storage
tanks. NR 420 (A) addresses emissions from petroleum storage; SPS 305
(B) addresses licensing; COMM 10 (D) is an older code reference.
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Question 2:
According to ATCP 93, which storage tank systems are required to have a
permit to operate?
A) All storage tanks regardless of size
B) Any storage tank system required to have a permit under ATCP 93.145
C) Only tanks larger than 1,000 gallons
D) Only tanks storing hazardous materials
Answer: B) Any storage tank system required to have a permit under ATCP
93.145
Rationale: Any storage tank system that is required to have a permit to
operate under ATCP 93.145 must meet the A/B/C Operator training
requirements. This includes most regulated UST systems.
Question 3:
The Federal Energy Policy Act of 2005 required states to implement operator
training programs for UST systems. This requirement is administered in
Wisconsin by:
A) EPA Region 5 only
B) Wisconsin Department of Natural Resources (DNR)
C) Wisconsin Department of Agriculture, Trade and Consumer Protection
(DATCP)
D) Wisconsin Department of Transportation (DOT)
Answer: C) Wisconsin Department of Agriculture, Trade and Consumer
Protection (DATCP)
Rationale: The Federal Energy Policy Act of 2005 required operator
training. In Wisconsin, the DATCP administers the A/B/C Operator
program. The DNR (B) handles wastewater and environmental permitting;
DSPS handles installer certification.
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Question 4:
What is the primary purpose of the Wisconsin A/B/C Operator training
requirements?
A) To ensure operators can drive tank trucks
B) To ensure operators have knowledge of UST system requirements and can
make informed compliance decisions
C) To certify operators as tank installers
D) To qualify operators for insurance discounts
Answer: B) To ensure operators have knowledge of UST system
requirements and can make informed compliance decisions
Rationale: Class A operator training programs must provide training in
basic underground storage tank system requirements so that the Class A
operator can make informed decisions regarding compliance and ensure
adherence to regulations.
Question 5:
Under Wisconsin law, who may install an underground tank system that is
regulated under ATCP 93?
A) Any licensed plumber
B) Any general contractor
C) A person who holds a certification as a certified underground tank system
installer
D) The property owner
Answer: C) A person who holds a certification as a certified underground
tank system installer
Rationale: No person may install an underground tank system that is
regulated under ATCP 93 unless the person holds a certification issued by
the DATCP or DSPS as a certified underground tank system installer.
Question 6:
Which Wisconsin statute/rule addresses the certification of underground tank
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system installers?
A) SPS 305.85
B) ATCP 93.500
C) NR 420.03
D) COMM 10.001
Answer: A) SPS 305.85
Rationale: SPS 305.85 specifically addresses underground tank system
installers, requiring that a person seeking to obtain certification shall take
and pass an examination.
Question 7:
According to Wisconsin regulations, what is the minimum size threshold for
an underground storage tank (UST) on a farm that is regulated?
A) 50 gallons
B) 60 gallons
C) 110 gallons
D) 1,000 gallons
Answer: B) 60 gallons
Rationale: All aboveground (≥ 110 gal.) and underground (≥ 60 gal.) tanks
on farms must be installed under the supervision of a certified installer.
This applies to farm tanks used to store or dispense petroleum products.
Question 8:
A Class A operator is defined as someone who:
A) Has overall responsibility for UST system compliance
B) Performs daily UST system operations
C) Responds to emergencies and alarms
D) Performs tank installations
Answer: A) Has overall responsibility for UST system compliance
WISCONSIN UNDERGROUND STORAGE TANK (UST)
OPERATOR EXAM 2026/2027 COMPLETE (100) CURRENT
TESTING QUESTIONS AND CORRECT ANSWERS WITH
DETAILED RATIONALES.
(UST)
Prepare for the Wisconsin Underground Storage Tank Operator Exam Practice with a
focused study resource designed to reinforce essential UST operation and compliance
concepts. It supports review of UST systems, operating requirements, release
detection, recordkeeping, release reporting and confirmation, energy-related
requirements, and corrective actions. Use the material to strengthen regulatory
knowledge, improve practical decision-making, and identify areas that may require
additional review before the examination. This resource is best suited for Wisconsin
Class A and Class B UST operators, facility managers, environmental professionals,
and candidates preparing for Wisconsin underground storage tank operator
certification.
MULTIPLE CHOICE.
SECTION 1: REGULATORY FRAMEWORK AND ADMINISTRATION (Questions
1–15)
Question 1:
Which Wisconsin Administrative Code chapter governs the regulations for
flammable, combustible, and hazardous liquids in storage tanks?
A) NR 420
B) SPS 305
C) ATCP 93
D) COMM 10
Answer: C) ATCP 93
Rationale: Wisconsin Administrative Code Chapter ATCP 93 governs the
regulations for flammable, combustible, and hazardous liquids in storage
tanks. NR 420 (A) addresses emissions from petroleum storage; SPS 305
(B) addresses licensing; COMM 10 (D) is an older code reference.
, Page 2 of 43
Question 2:
According to ATCP 93, which storage tank systems are required to have a
permit to operate?
A) All storage tanks regardless of size
B) Any storage tank system required to have a permit under ATCP 93.145
C) Only tanks larger than 1,000 gallons
D) Only tanks storing hazardous materials
Answer: B) Any storage tank system required to have a permit under ATCP
93.145
Rationale: Any storage tank system that is required to have a permit to
operate under ATCP 93.145 must meet the A/B/C Operator training
requirements. This includes most regulated UST systems.
Question 3:
The Federal Energy Policy Act of 2005 required states to implement operator
training programs for UST systems. This requirement is administered in
Wisconsin by:
A) EPA Region 5 only
B) Wisconsin Department of Natural Resources (DNR)
C) Wisconsin Department of Agriculture, Trade and Consumer Protection
(DATCP)
D) Wisconsin Department of Transportation (DOT)
Answer: C) Wisconsin Department of Agriculture, Trade and Consumer
Protection (DATCP)
Rationale: The Federal Energy Policy Act of 2005 required operator
training. In Wisconsin, the DATCP administers the A/B/C Operator
program. The DNR (B) handles wastewater and environmental permitting;
DSPS handles installer certification.
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Question 4:
What is the primary purpose of the Wisconsin A/B/C Operator training
requirements?
A) To ensure operators can drive tank trucks
B) To ensure operators have knowledge of UST system requirements and can
make informed compliance decisions
C) To certify operators as tank installers
D) To qualify operators for insurance discounts
Answer: B) To ensure operators have knowledge of UST system
requirements and can make informed compliance decisions
Rationale: Class A operator training programs must provide training in
basic underground storage tank system requirements so that the Class A
operator can make informed decisions regarding compliance and ensure
adherence to regulations.
Question 5:
Under Wisconsin law, who may install an underground tank system that is
regulated under ATCP 93?
A) Any licensed plumber
B) Any general contractor
C) A person who holds a certification as a certified underground tank system
installer
D) The property owner
Answer: C) A person who holds a certification as a certified underground
tank system installer
Rationale: No person may install an underground tank system that is
regulated under ATCP 93 unless the person holds a certification issued by
the DATCP or DSPS as a certified underground tank system installer.
Question 6:
Which Wisconsin statute/rule addresses the certification of underground tank
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system installers?
A) SPS 305.85
B) ATCP 93.500
C) NR 420.03
D) COMM 10.001
Answer: A) SPS 305.85
Rationale: SPS 305.85 specifically addresses underground tank system
installers, requiring that a person seeking to obtain certification shall take
and pass an examination.
Question 7:
According to Wisconsin regulations, what is the minimum size threshold for
an underground storage tank (UST) on a farm that is regulated?
A) 50 gallons
B) 60 gallons
C) 110 gallons
D) 1,000 gallons
Answer: B) 60 gallons
Rationale: All aboveground (≥ 110 gal.) and underground (≥ 60 gal.) tanks
on farms must be installed under the supervision of a certified installer.
This applies to farm tanks used to store or dispense petroleum products.
Question 8:
A Class A operator is defined as someone who:
A) Has overall responsibility for UST system compliance
B) Performs daily UST system operations
C) Responds to emergencies and alarms
D) Performs tank installations
Answer: A) Has overall responsibility for UST system compliance
