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Class A/B Operator Underground Storage Tank
(UST) Certification 2025 — Training Course, Exam,
and Compliance Guide
Earn your Class A/B Operator Underground Storage Tank (UST) certification 2025 with the
latest training course, exam, and compliance resources. Learn UST system operations, spill
prevention, leak detection, and EPA regulatory requirements to ensure full environmental
compliance and protect groundwater safety.
• Class A/B Operator Underground Storage certification 2025
• UST Class A/B Operator training online
• Underground Storage Tank operator exam
•
When using secondary containment with interstitial monitor must be checked at least once
every... - ANSWER-30 days
A manual tank gauge stick must be marked to the nearest: - ANSWER-1/8 inch
Records of tank and piping tightness testing should be maintained for: - ANSWER-5 years
Class C Operators should know: - ANSWER-How to respond to emergencies at the facility
If LARA determines that a UST system is out of compliance with state and federal regualtions,
the __________ for that UST system must. be retrained. - ANSWER-Class A Operator
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Which UST operators are responsible for maintaining compliance with federal, state, and local
regulations? - ANSWER-Class A Operator
Which description best describes a Class B Operator? - ANSWER-Individuals focused on day-to-
day aspects of operating, maintaining, and record keeping at the locations he or she is
responsible for
Tank tightness testing, or another test of equivalent performance, shall be capable of detecting
X gallon per hour leak rate from any portion of the tank while accounting for the effects of
thermal expansion or the contraction of the product, vapor pockets, tank deformation,
evaporation or condensation, and the location of the water table. X is: - ANSWER-0.1 gallons per
hour
MUSTR requires that X soil borings to be taken as close as practical to the bottom of the UST,
but no more than 5 feet away from the tank, nor more than 2 feet below the tank. X is: -
ANSWER-2 soil borings
The results of site assessments conductedper MUSTR R 29.2155 are required to be kept by the
owner for not less than X years. X is: - ANSWER-3 years
Which National Leak Prevention Association Standard on lining of USTs is adopted by reference
in the MUSTR? - ANSWER-631
MUSTR requires what to happen with a UST before it is removed from the ground or closed in
place? - ANSWER-Is registered and all fees are paid
Class A Operators must take and pass the ICC Class A Operator Exam every _______. - ANSWER-
5 years
Class A/B Operator Underground Storage Tank
(UST) Certification 2025 — Training Course, Exam,
and Compliance Guide
Earn your Class A/B Operator Underground Storage Tank (UST) certification 2025 with the
latest training course, exam, and compliance resources. Learn UST system operations, spill
prevention, leak detection, and EPA regulatory requirements to ensure full environmental
compliance and protect groundwater safety.
• Class A/B Operator Underground Storage certification 2025
• UST Class A/B Operator training online
• Underground Storage Tank operator exam
•
When using secondary containment with interstitial monitor must be checked at least once
every... - ANSWER-30 days
A manual tank gauge stick must be marked to the nearest: - ANSWER-1/8 inch
Records of tank and piping tightness testing should be maintained for: - ANSWER-5 years
Class C Operators should know: - ANSWER-How to respond to emergencies at the facility
If LARA determines that a UST system is out of compliance with state and federal regualtions,
the __________ for that UST system must. be retrained. - ANSWER-Class A Operator
, 2|Page
Which UST operators are responsible for maintaining compliance with federal, state, and local
regulations? - ANSWER-Class A Operator
Which description best describes a Class B Operator? - ANSWER-Individuals focused on day-to-
day aspects of operating, maintaining, and record keeping at the locations he or she is
responsible for
Tank tightness testing, or another test of equivalent performance, shall be capable of detecting
X gallon per hour leak rate from any portion of the tank while accounting for the effects of
thermal expansion or the contraction of the product, vapor pockets, tank deformation,
evaporation or condensation, and the location of the water table. X is: - ANSWER-0.1 gallons per
hour
MUSTR requires that X soil borings to be taken as close as practical to the bottom of the UST,
but no more than 5 feet away from the tank, nor more than 2 feet below the tank. X is: -
ANSWER-2 soil borings
The results of site assessments conductedper MUSTR R 29.2155 are required to be kept by the
owner for not less than X years. X is: - ANSWER-3 years
Which National Leak Prevention Association Standard on lining of USTs is adopted by reference
in the MUSTR? - ANSWER-631
MUSTR requires what to happen with a UST before it is removed from the ground or closed in
place? - ANSWER-Is registered and all fees are paid
Class A Operators must take and pass the ICC Class A Operator Exam every _______. - ANSWER-
5 years
