ICC CALIFORNIA UST SERVICE COMPREHENSIVE EXAM
SHEET 2025/2026 QUESTIONS AND ANSWERS GRADED
A++
✔✔In order for a monitoring system to be considered "fail safe" it must... - ✔✔shut down
the pumping system when the monitoring system fails or is disconnected
✔✔Gasoline is one of the most dangerous petroleum products because it _____. -
✔✔has a very low flashpoint
readily ignites under typical ambient conditions
readily generates flammable vapors
✔✔A monitoring system certification form requires information for_____. - ✔✔every
UST and dispenser at the facility
✔✔Piping which returns vapors to the UST must provide a clear unobstructed path and
have a uniform slope of at least _____ drop back to the tank. - ✔✔1/8 inch per foot
✔✔Does the secondary containment testing report need to be submitted to the local
agency and if so who is responsible to submit it? - ✔✔yes: the owner/operator is
responsible
✔✔If equipped with an overfill alarm it must be located _____. - ✔✔so that it can be
seen and or heard for the delivery location
✔✔A combustible gas indicator is designed and calibrated to determine the _____ of a
vapor concentration. - ✔✔lower explosive limit
✔✔Automatic tank gauges (ATG) will detect a leak in the _____. - ✔✔tank and product
piping system
✔✔If statistical inventory reconciliation is utilized as the means of release for a single
walled tank, a _____ must be accomplished every 2 years. - ✔✔a tank integrity test
✔✔On and after _____ all pressurized product piping with secondary containment shall
be equipped with an automatic line leak detector capable of detecting of a 3 gph
release. - ✔✔November 9, 2004
✔✔Steel flex piping must be cathodically protected if the flex piping is _____. - ✔✔in
contact with backfill material (bare ground)
, ✔✔A liquid collection point (condensate trap drop-out tank vapor-pot) is to be used
when the _____. - ✔✔UST is not buried deep enough to allow minimum vapor recovery
piping slope
✔✔_____ is an effective method of controlling the fuel element of the fire triangle. -
✔✔Purging
✔✔Automatic line leak detectors installed on pressurized piping must be capable of
detecting a release of equivalent to at least... - ✔✔3 gph @ 10 lbs per square inch
✔✔Each of the following statements apply to under dispenser containment except:
a. a continuous monitoring system is required
b. the continuous monitoring requirements is waived if there is a sensor in the turbine
sump
c. the monitoring system must be capable of detecting leaks at the earliest possible
opportunity
d. periodic test must be conducted in accordance with secondary containment testing -
✔✔b. continuous monitoring requirements waived if there is a sensor in the turbine
sump
✔✔Automatic line leak detectors are required for all of the following product systems
except:
a. sloped piping
b. suction piping
c. pressurized piping
d. secondary containment piping - ✔✔a. sloped piping
✔✔Gasoline vapors are 3 to 4 times _____ than air. - ✔✔heavier
✔✔Cathodic protection systems must be inspected by a certified cathodic protection
tester within _____ months of installation. - ✔✔6 months
✔✔When an impressed current system is used cathodic protection the cathodic
protection rectifier... - ✔✔...must be on and operating at all times to the protect the UST
system from corrosion.
✔✔These components must be presented for a fire to burn. Often referred to as the "fire
triangle". Which is not one of the fire triangle components:
a. fuel
b. oxygen
c. carbon dioxide
SHEET 2025/2026 QUESTIONS AND ANSWERS GRADED
A++
✔✔In order for a monitoring system to be considered "fail safe" it must... - ✔✔shut down
the pumping system when the monitoring system fails or is disconnected
✔✔Gasoline is one of the most dangerous petroleum products because it _____. -
✔✔has a very low flashpoint
readily ignites under typical ambient conditions
readily generates flammable vapors
✔✔A monitoring system certification form requires information for_____. - ✔✔every
UST and dispenser at the facility
✔✔Piping which returns vapors to the UST must provide a clear unobstructed path and
have a uniform slope of at least _____ drop back to the tank. - ✔✔1/8 inch per foot
✔✔Does the secondary containment testing report need to be submitted to the local
agency and if so who is responsible to submit it? - ✔✔yes: the owner/operator is
responsible
✔✔If equipped with an overfill alarm it must be located _____. - ✔✔so that it can be
seen and or heard for the delivery location
✔✔A combustible gas indicator is designed and calibrated to determine the _____ of a
vapor concentration. - ✔✔lower explosive limit
✔✔Automatic tank gauges (ATG) will detect a leak in the _____. - ✔✔tank and product
piping system
✔✔If statistical inventory reconciliation is utilized as the means of release for a single
walled tank, a _____ must be accomplished every 2 years. - ✔✔a tank integrity test
✔✔On and after _____ all pressurized product piping with secondary containment shall
be equipped with an automatic line leak detector capable of detecting of a 3 gph
release. - ✔✔November 9, 2004
✔✔Steel flex piping must be cathodically protected if the flex piping is _____. - ✔✔in
contact with backfill material (bare ground)
, ✔✔A liquid collection point (condensate trap drop-out tank vapor-pot) is to be used
when the _____. - ✔✔UST is not buried deep enough to allow minimum vapor recovery
piping slope
✔✔_____ is an effective method of controlling the fuel element of the fire triangle. -
✔✔Purging
✔✔Automatic line leak detectors installed on pressurized piping must be capable of
detecting a release of equivalent to at least... - ✔✔3 gph @ 10 lbs per square inch
✔✔Each of the following statements apply to under dispenser containment except:
a. a continuous monitoring system is required
b. the continuous monitoring requirements is waived if there is a sensor in the turbine
sump
c. the monitoring system must be capable of detecting leaks at the earliest possible
opportunity
d. periodic test must be conducted in accordance with secondary containment testing -
✔✔b. continuous monitoring requirements waived if there is a sensor in the turbine
sump
✔✔Automatic line leak detectors are required for all of the following product systems
except:
a. sloped piping
b. suction piping
c. pressurized piping
d. secondary containment piping - ✔✔a. sloped piping
✔✔Gasoline vapors are 3 to 4 times _____ than air. - ✔✔heavier
✔✔Cathodic protection systems must be inspected by a certified cathodic protection
tester within _____ months of installation. - ✔✔6 months
✔✔When an impressed current system is used cathodic protection the cathodic
protection rectifier... - ✔✔...must be on and operating at all times to the protect the UST
system from corrosion.
✔✔These components must be presented for a fire to burn. Often referred to as the "fire
triangle". Which is not one of the fire triangle components:
a. fuel
b. oxygen
c. carbon dioxide
