Class A/B
Class A/B Operator for Underground
Storage Tank Exam Guide Questions and
Answers 2025
The Class A and Class B certification must be renewed every: -Correct Answer ✔5
years
UST financial responsibility requirements apply to what? -Correct Answer ✔600 gallon
used oil tank
Secondary Containment is required for what? -Correct Answer ✔New UST Systems,
Piping in contact with the ground, and Replacement UST
A Class A operator shall maintain the records of UST site inspections for a *minimum*
of: -Correct Answer ✔3 years
New owners of an existing UST system shall register the UST system with DEQ/LARA
within what period from date of ownership? -Correct Answer ✔30 days
UST systems with cathodic protection should be inspected for proper operation by a
qualified cathodic protection tester on the following schedule: -Correct Answer ✔Every
three years
UST systems with impressed current cathodic protection systems must be inspected at
a minimum: -Correct Answer ✔Every 60 days
Within what period after a repair should a cathodically protected UST system be tested
to ensure it is working properly? -Correct Answer ✔6 months
Pressurized underground piping that routinely contains regulated substances shall be
monitored for releases in a manner that meets what requirements? -Correct Answer
✔Be equipped with a line leak detector, and have an annual line tightness test
A suspected release must be confirmed to the DEQ/LARA within: -Correct Answer ✔7
days
What actions are required in MUSTR when there is a spill or overfil of petroleum or
hazardouz substances that result in a release into groundwater, surface water, or
substance soils? -Correct Answer ✔Notify DEQ/LARA of a confirmed release,
Immediately clean up the spill or overfill, and Contain the spill
Class A/B
, Class A/B
To permanently close a tank, an owner and operator shall: -Correct Answer ✔Remove
the tank from the ground, Fill with an inert solid if removal jeopardizes the building
structure integrity, and Empty and clean the tank by removing all liquids and
accumulated sludge and purge it of all vapors
If you have 100 or fewer tanks, financial responsibility is required in the aggregate the
amount of: -Correct Answer ✔$1 Million
Petroleum marketers are required to have finanical responsibility to cover X dollars per
occurence. X is.... -Correct Answer ✔$1 Million
Can an owner use pollution liability insurance as a means of financial responsibility? -
Correct Answer ✔Yes
An automatic tank gauge must be able to detect a leak of X gallons per hour. X is: -
Correct Answer ✔0.2 gallons per hour
Statistical Inventory reconciliation (SIR) analyzes the following as a means of leak
detection: -Correct Answer ✔Inventory, Delivery and Dispensing
Manual tank gauging can be used as the 'sole' means of a leak detection for tanks that
are X gallons or less in capacity. X is: -Correct Answer ✔550 gallons
Check if the following statement is true or false: "A third party evaluation of a statistical
inventory reconciliation is good for any type of tank and product." -Correct Answer
✔False
Automatic line leak detectors must be able to detect a leak of at least X gallons per hour
at a line pressure of 10 psi witin one hour. X is: -Correct Answer ✔3 gallons per hour
Line testing of piping shall be capable of detecting X gallons per hour leak rate at 1 and
a half times the operating pressure. X is: -Correct Answer ✔0.1 gallons per hour
What actions are not appropriate when when the owner/operator becomes aware of a
spill or overfill? -Correct Answer ✔Drain the spill to the storm sewer or nearby ditch
Upon confirmation of a release to the soil/groundwater/surface water the operator shall:
-Correct Answer ✔Report the release to the DEQ within 24 hours, by fax or phone
A Class B operator shall not be responsible for more than the following facilities: -
Correct Answer ✔45 facilities
What is the minimum frequency of site inspections to assure operational compliance? -
Correct Answer ✔Quarterly
Class A/B
Class A/B Operator for Underground
Storage Tank Exam Guide Questions and
Answers 2025
The Class A and Class B certification must be renewed every: -Correct Answer ✔5
years
UST financial responsibility requirements apply to what? -Correct Answer ✔600 gallon
used oil tank
Secondary Containment is required for what? -Correct Answer ✔New UST Systems,
Piping in contact with the ground, and Replacement UST
A Class A operator shall maintain the records of UST site inspections for a *minimum*
of: -Correct Answer ✔3 years
New owners of an existing UST system shall register the UST system with DEQ/LARA
within what period from date of ownership? -Correct Answer ✔30 days
UST systems with cathodic protection should be inspected for proper operation by a
qualified cathodic protection tester on the following schedule: -Correct Answer ✔Every
three years
UST systems with impressed current cathodic protection systems must be inspected at
a minimum: -Correct Answer ✔Every 60 days
Within what period after a repair should a cathodically protected UST system be tested
to ensure it is working properly? -Correct Answer ✔6 months
Pressurized underground piping that routinely contains regulated substances shall be
monitored for releases in a manner that meets what requirements? -Correct Answer
✔Be equipped with a line leak detector, and have an annual line tightness test
A suspected release must be confirmed to the DEQ/LARA within: -Correct Answer ✔7
days
What actions are required in MUSTR when there is a spill or overfil of petroleum or
hazardouz substances that result in a release into groundwater, surface water, or
substance soils? -Correct Answer ✔Notify DEQ/LARA of a confirmed release,
Immediately clean up the spill or overfill, and Contain the spill
Class A/B
, Class A/B
To permanently close a tank, an owner and operator shall: -Correct Answer ✔Remove
the tank from the ground, Fill with an inert solid if removal jeopardizes the building
structure integrity, and Empty and clean the tank by removing all liquids and
accumulated sludge and purge it of all vapors
If you have 100 or fewer tanks, financial responsibility is required in the aggregate the
amount of: -Correct Answer ✔$1 Million
Petroleum marketers are required to have finanical responsibility to cover X dollars per
occurence. X is.... -Correct Answer ✔$1 Million
Can an owner use pollution liability insurance as a means of financial responsibility? -
Correct Answer ✔Yes
An automatic tank gauge must be able to detect a leak of X gallons per hour. X is: -
Correct Answer ✔0.2 gallons per hour
Statistical Inventory reconciliation (SIR) analyzes the following as a means of leak
detection: -Correct Answer ✔Inventory, Delivery and Dispensing
Manual tank gauging can be used as the 'sole' means of a leak detection for tanks that
are X gallons or less in capacity. X is: -Correct Answer ✔550 gallons
Check if the following statement is true or false: "A third party evaluation of a statistical
inventory reconciliation is good for any type of tank and product." -Correct Answer
✔False
Automatic line leak detectors must be able to detect a leak of at least X gallons per hour
at a line pressure of 10 psi witin one hour. X is: -Correct Answer ✔3 gallons per hour
Line testing of piping shall be capable of detecting X gallons per hour leak rate at 1 and
a half times the operating pressure. X is: -Correct Answer ✔0.1 gallons per hour
What actions are not appropriate when when the owner/operator becomes aware of a
spill or overfill? -Correct Answer ✔Drain the spill to the storm sewer or nearby ditch
Upon confirmation of a release to the soil/groundwater/surface water the operator shall:
-Correct Answer ✔Report the release to the DEQ within 24 hours, by fax or phone
A Class B operator shall not be responsible for more than the following facilities: -
Correct Answer ✔45 facilities
What is the minimum frequency of site inspections to assure operational compliance? -
Correct Answer ✔Quarterly
Class A/B
