1
ICC CALIFORNIA UST INSPECTOR REAL
EXAM TEST QUESTIONS WITH CORRECT
ANSWERS 2025/2026 LATEST BEST
QUALITY GRADED EXAM
Which of the following would not require secondary containment testing?
a.) Interstitial space hydrostatically monitored
b.) Under-dispenser containment
c.) Turbine piping sump
d.) Secondary piping -- ANSWER--a.) Interstitial space hydrostatically monitored
CCR Title 23, Sec 2637(g)
Fiberglass tanks shall be repaired by the following, except:
a.) Small fractures and fissures may be repaired with epoxy
b.) Fiberglass cloth with a minimum dimension 12 x 12 inches centered over the area to be
repaired.
c.) A second layer of fiberglass cloth shall be installed directly over the primary cloth layer
and shall be cut to overlap the primary patch by 5 inches on all sides.
d.) The repaired tank shall be tested for tightness within 30 calendar days following the date
of the completion of the repair. -- ANSWER--c.) A second layer of fiberglass cloth shall be
installed directly over the primary cloth layer and shall be cut to overlap the primary patch by
5 inches on all sides.
CCR Title 23, Sec 2661(d)(4)
, 2
Automatic line leak detectors shall be installed on underground pressurized piping and shall
be capable of detecting a 3-gallon per hour leak rate at 10 psi within 1 hour with a probability
of detection of at least % and a probability of false alarm no greater than %.
a.) 95, 5
b.) 98, 2
c.) 5, 95
d.) 2, 98 -- ANSWER--a.) 95, 5
CCR Title 23, Sec 2636(f)(2) & 2643(c)(1)
An emergency impact valve (shear valve) is found in the following location on an UST
System.
a.) At the turbine piping termination
b.) Base of the dispenser
c.) Under the extractor tee
d.) Spill container -- ANSWER--b.) Base of the dispenser
Notification to perform a secondary containment test must be given to the local agency by:
a.) A service technician or a licensed tank tester.
b.) Cathodic protection tester.
c.) Owner/operator of UST.
d.) State Water Resources Control Board. -- ANSWER--c.) Owner/operator of UST
CCR Title 23, Sec 2637(f)
An owner or operator of an underground storage tank or any part thereof that is destined for a
specific reuse shall advise the local agency, within the time frame specified by that agency, of
all of the following, except:
, 3
a.) The nature of intended use
b.) The name of the new owner and new operator of the UST
c.) The location of intended use
d.) The State Water Resources Control Board must be advised not the local agency --
ANSWER--d.) The State Water Resources Control Board must be advised not the local
agency
CCR Title 23, Sec 2672(b)(4)
Any person(s) installing underground storage tank systems or components shall be certified
or licensed by:
a.) The Contractors State License Board
b.) The local agency
c.) The State Water Resources Control Board
d.) The Regional Water Quality Board -- ANSWER--a.) The Contractors State License Board
CCR Title 23, Sec 2715(g)
The designated UST operator(s) shall perform monthly visual inspections of all UST's for
which they are designated. The monthly visual inspection shall include all of the following,
except:
a.) Inspecting for the presence of hazardous substances, water, or debris in spill containers.
b.) By July 1, 2005, verify that all facility employees have been trained.
c.) Reviewing the alarm history report or log for the previous month.
d.) Inspecting for the presence of hazardous substances, water, or debris in containment
sumps regardless of documentation showing each alarm for the previous month has been
responded to appropriately. -- ANSWER--d.) Inspecting for the presence of hazardous
substances, water, or debris in containment sumps regardless of documentation showing each
alarm for the previous month has been responded to appropriately.
, 4
CCR Title 23, Sec 2715(c)
Which lagency lapproves la lsite-specific lvariance lwhich lallows lfor lan lalternative lmethod lof
l construction lor lmonitoring:
a.) The lRegional lWater lQuality lBoard
b.) The lState lWater lResources lControl lBoard
c.) The lDepartment lof lToxic lSubstance lControl
d.) The llocal lagency l-- lANSWER--a.) lThe lRegional lWater lQuality lBoard
l CCR lTitle l23, lSec l2681(a)
The lregulations lto lenforce lcompliance lof lunderground lstorage ltank lsystems lin lthe lstate lare
l found lin?
a.) Code lof lFederal lRegulations, l40 lCFR lPart l281
b.) California lCode lof lRegulations, lTitle l23, lChapter l16
c.) Code lof lFederal lRegulations, l40 lCFR lPart l280
d.) California lCode lof lRegulations, lTitle l23, lChapter l17 l-- lANSWER--b.) lCalifornia lCode lof
l Regulations; lTitle l23, lChapter l16
By ldefinition lan l"underground lstorage ltank lsystem" lincludes
a.) The ltank, lall lconnected lpiping land ldispensers
b.) The ltank, lall lconnected lpiping, lancillary lequipment land lcontainment lsystem
c.) Only lthe ltank
d.) Only ltanks ltotally lbeneath lthe lsurface lof lthe lground l-- lANSWER--b.) lThe ltank, lall
l connected lpiping, lancillary lequipment land lcontainment lsystem
ICC CALIFORNIA UST INSPECTOR REAL
EXAM TEST QUESTIONS WITH CORRECT
ANSWERS 2025/2026 LATEST BEST
QUALITY GRADED EXAM
Which of the following would not require secondary containment testing?
a.) Interstitial space hydrostatically monitored
b.) Under-dispenser containment
c.) Turbine piping sump
d.) Secondary piping -- ANSWER--a.) Interstitial space hydrostatically monitored
CCR Title 23, Sec 2637(g)
Fiberglass tanks shall be repaired by the following, except:
a.) Small fractures and fissures may be repaired with epoxy
b.) Fiberglass cloth with a minimum dimension 12 x 12 inches centered over the area to be
repaired.
c.) A second layer of fiberglass cloth shall be installed directly over the primary cloth layer
and shall be cut to overlap the primary patch by 5 inches on all sides.
d.) The repaired tank shall be tested for tightness within 30 calendar days following the date
of the completion of the repair. -- ANSWER--c.) A second layer of fiberglass cloth shall be
installed directly over the primary cloth layer and shall be cut to overlap the primary patch by
5 inches on all sides.
CCR Title 23, Sec 2661(d)(4)
, 2
Automatic line leak detectors shall be installed on underground pressurized piping and shall
be capable of detecting a 3-gallon per hour leak rate at 10 psi within 1 hour with a probability
of detection of at least % and a probability of false alarm no greater than %.
a.) 95, 5
b.) 98, 2
c.) 5, 95
d.) 2, 98 -- ANSWER--a.) 95, 5
CCR Title 23, Sec 2636(f)(2) & 2643(c)(1)
An emergency impact valve (shear valve) is found in the following location on an UST
System.
a.) At the turbine piping termination
b.) Base of the dispenser
c.) Under the extractor tee
d.) Spill container -- ANSWER--b.) Base of the dispenser
Notification to perform a secondary containment test must be given to the local agency by:
a.) A service technician or a licensed tank tester.
b.) Cathodic protection tester.
c.) Owner/operator of UST.
d.) State Water Resources Control Board. -- ANSWER--c.) Owner/operator of UST
CCR Title 23, Sec 2637(f)
An owner or operator of an underground storage tank or any part thereof that is destined for a
specific reuse shall advise the local agency, within the time frame specified by that agency, of
all of the following, except:
, 3
a.) The nature of intended use
b.) The name of the new owner and new operator of the UST
c.) The location of intended use
d.) The State Water Resources Control Board must be advised not the local agency --
ANSWER--d.) The State Water Resources Control Board must be advised not the local
agency
CCR Title 23, Sec 2672(b)(4)
Any person(s) installing underground storage tank systems or components shall be certified
or licensed by:
a.) The Contractors State License Board
b.) The local agency
c.) The State Water Resources Control Board
d.) The Regional Water Quality Board -- ANSWER--a.) The Contractors State License Board
CCR Title 23, Sec 2715(g)
The designated UST operator(s) shall perform monthly visual inspections of all UST's for
which they are designated. The monthly visual inspection shall include all of the following,
except:
a.) Inspecting for the presence of hazardous substances, water, or debris in spill containers.
b.) By July 1, 2005, verify that all facility employees have been trained.
c.) Reviewing the alarm history report or log for the previous month.
d.) Inspecting for the presence of hazardous substances, water, or debris in containment
sumps regardless of documentation showing each alarm for the previous month has been
responded to appropriately. -- ANSWER--d.) Inspecting for the presence of hazardous
substances, water, or debris in containment sumps regardless of documentation showing each
alarm for the previous month has been responded to appropriately.
, 4
CCR Title 23, Sec 2715(c)
Which lagency lapproves la lsite-specific lvariance lwhich lallows lfor lan lalternative lmethod lof
l construction lor lmonitoring:
a.) The lRegional lWater lQuality lBoard
b.) The lState lWater lResources lControl lBoard
c.) The lDepartment lof lToxic lSubstance lControl
d.) The llocal lagency l-- lANSWER--a.) lThe lRegional lWater lQuality lBoard
l CCR lTitle l23, lSec l2681(a)
The lregulations lto lenforce lcompliance lof lunderground lstorage ltank lsystems lin lthe lstate lare
l found lin?
a.) Code lof lFederal lRegulations, l40 lCFR lPart l281
b.) California lCode lof lRegulations, lTitle l23, lChapter l16
c.) Code lof lFederal lRegulations, l40 lCFR lPart l280
d.) California lCode lof lRegulations, lTitle l23, lChapter l17 l-- lANSWER--b.) lCalifornia lCode lof
l Regulations; lTitle l23, lChapter l16
By ldefinition lan l"underground lstorage ltank lsystem" lincludes
a.) The ltank, lall lconnected lpiping land ldispensers
b.) The ltank, lall lconnected lpiping, lancillary lequipment land lcontainment lsystem
c.) Only lthe ltank
d.) Only ltanks ltotally lbeneath lthe lsurface lof lthe lground l-- lANSWER--b.) lThe ltank, lall
l connected lpiping, lancillary lequipment land lcontainment lsystem
