ICC California UST Inspector Exam
Questions and Answers 100% Correct
2025/2026 Version.
Which agency approves a site-specific variance which allows for an alternative method of
construction or monitoring:
a.) The Regional Water Quality Board
b.) The State Water Resources Control Board
c.) The Department of Toxic Substance Control
d.) The local agency - Correct Answer - a.) The Regional Water Quality Board
CCR Title 23, Sec 2681(a)
The regulations to enforce compliance of underground storage tank systems in the state are found
in?
a.) Code of Federal Regulations, 40 CFR Part 281
b.) California Code of Regulations, Title 23, Chapter 16
c.) Code of Federal Regulations, 40 CFR Part 280
d.) California Code of Regulations, Title 23, Chapter 17 - Correct Answer - b.) California Code
of Regulations; Title 23, Chapter 16
By definition an "underground storage tank system" includes
a.) The tank, all connected piping and dispensers
b.) The tank, all connected piping, ancillary equipment and containment system
c.) Only the tank
d.) Only tanks totally beneath the surface of the ground - Correct Answer - b.) The tank, all
connected piping, ancillary equipment and containment system
(H&SC, Sec 25281(z))
,The written report submitted to the local agency after an unauthorized release is required to
include the following except:
a.) Description of actions taken to stop the release
b.) Cause of the release
c.) Method of disposal of released product
d.) Date on which the release was discovered - Correct Answer - b.) Cause of the release
CCR Title 23, Sec 2652(c)
An unauthorized release which does not escape from secondary containment only requires a
record on the operator's monitoring reports provided:
A. It did not increase the hazard of fire
B. It did not cause any deterioration of the secondary containment
C. It was cleaned up within 8 hours of detection
D. All of the above - Correct Answer - D. All of the above
H&SC, Sec 25294
The annual monitoring certification may be performed by:
A. A person possessing the appropriate contractors licenses
B. An individual trained and certified by the manufacturer of the monitoring equipment
C. A designated UST operator
D. A person who meets the requirements of both a and b - Correct Answer - D. A person who
meets the requirements of both a and b
CCR Title 23, Sec 2715(i)
When an automatic tank gauge is utilized for single-walled tank leak detection, it shall generate a
post-test hard copy data report of the following information, except:
a.) Liquid volume
b.) Fuel depth
c.) Outside air temperature
d.) Time and date of test - Correct Answer - c.) Outside air temperature
CCR Title 23, Sec 2643(b)(1)
If a UST system is utilizing an overfill alarm, the alarm must be triggered to alert the transfer
operator when the tank is no more than ___________ full
,a.) 85%
b.) 95%
c.) 90%
d.) 80% - Correct Answer - c.) 90%
An automatic ftank fgauge fis futilized ffor fleak fdetection fof fthe f______________.
a.) fTank
b.) fTank fand fPiping
c.) fPiping
d.) fInterstitial fspace f- fCorrect f fAnswer f- fa.) fTank
CCR fTitle f23, fSec f2643(b)(1)
After fcompletion fof fenhanced fleak fdetection f(ELD) ftest, fthe fELD ftest fresults fmust fbe
fsubmitted fto fthe f_________________.
a.) fThe flocal fagency
b.) fThe fSWRCB
c.) fOwner fof fthe fUST fsystem
d.) fTo fboth fthe fSWRCB fand fthe flocal fagency f- fCorrect f fAnswer f- fd.) fTo fboth fthe fSWRCB
fand fthe flocal fagency
CCR fTitle f23, fSec f2644.1(a)(5)
A fpermit fto foperate fa fUST fsystem fmust fhave fall fof fthe ffollowing flisted fon fthe fpermit,
fEXCEPT:
a.) fThe fstate fUST fidentification fnumber(s)
b.) fName fof fthe ftank fmanufacturer fand ftank fcapacity
c.) fPermit fexpiration fdate
d.) fMonitoring frequirements f- fCorrect f fAnswer f- fb.) fName fof fthe ftank fmanufacturer fand
ftank fcapacity
CCR fTitle f23, fSec f2712(c)
A ftemporary fclosure fis fappropriate ffor fwhich fof fthe ffollowing:
a.) fThe fUST fsystem fis fempty fand fwill fbe fremoved ffrom fservice findefinitely
b.) fThe fUST fsystem fhas fceased fto fstore fhazardous fmaterials fbut fwill fbe fused fwithin fthe
fnext f12 fconsecutive fmonths
, c.) fThe fUST fsystem fis funable fto fmeet fcompliance frequirements fand fwill fbe fremoved
d.) fThe fUST fsystem fhas fbeen fred-tagged f- fCorrect f fAnswer f- fb.) fThe fUST fsystem fhas
fceased fto fstore fhazardous fmaterials fbut fwill fbe fused fwithin fthe fnext f12 fconsecutive fmonths
CCR fTitle f23, fSec f2671 f& f2670
A flocal fagency fdetermines fthat fa fUST ffacility fwithin fthe flast fyear fhad fcompliance fissues.
fPrior fto fissuing fa fnew fpermit for frenewal fto foperate fan fUST fthe flocal fagency fshall:
a.) fAsk fthe fstate fto fassist fin fa fjoint finspection
b.) fRequest fthe fowner/operator fto fsubmit fa f"Return fto fCompliance" fform.
c.) fRefer fto fa fDistrict fAttorney fInvestigator
d.) fInspect fthe ffacility fand fdetermine fcompliance f- fCorrect f fAnswer f- fd.) fInspect fthe ffacility
fand fdetermine fcompliance
CCR fTitle f23, fSec f2712(c)
All fthe ffollowing fcomponents frequire fthird fparty fcertification, fexcept:
a.) fAutomatic ftank fgauging fsystems
b.) fStatistical finventory freconciliation fmethods
c.) fSpill fContainment flids
d.) fLiquid fphase fout-of-tank fproducts f- fCorrect f fAnswer f- fc.) fSpill fContainment flids
The fexterior fsurface fof fan funderground fstorage ftank fmust fbear fa fmarking for flabel fwhich
fshows fthe ffollowing finformation, fexcept:
a.) fDesign fpressure fin fpsig
b.) fUseable fcapacity fin fgallons.
c.) fWidth fof fthe finterstitial fspace
d.) fIdentity fof fmanufacturer f- fCorrect f fAnswer f- fc.) fWidth fof fthe finterstitial fspace
CCR fTitle f23, fSec f2631(b)
Which fof fthe ffollowing fis fnot fa fconfined fspace:
a.) fA freally fdeep fturbine fsump
b.) fA fspace fnot fdesigned ffor fcontinuous femployee foccupancy
c.) fAn farea fwith flimited faccess
d.) fAn farea fwith flimited fventilation f- fCorrect f fAnswer f- fd.) fAn farea fwith flimited fventilation
CCR fTitle f8, fSec f5157(b)
Questions and Answers 100% Correct
2025/2026 Version.
Which agency approves a site-specific variance which allows for an alternative method of
construction or monitoring:
a.) The Regional Water Quality Board
b.) The State Water Resources Control Board
c.) The Department of Toxic Substance Control
d.) The local agency - Correct Answer - a.) The Regional Water Quality Board
CCR Title 23, Sec 2681(a)
The regulations to enforce compliance of underground storage tank systems in the state are found
in?
a.) Code of Federal Regulations, 40 CFR Part 281
b.) California Code of Regulations, Title 23, Chapter 16
c.) Code of Federal Regulations, 40 CFR Part 280
d.) California Code of Regulations, Title 23, Chapter 17 - Correct Answer - b.) California Code
of Regulations; Title 23, Chapter 16
By definition an "underground storage tank system" includes
a.) The tank, all connected piping and dispensers
b.) The tank, all connected piping, ancillary equipment and containment system
c.) Only the tank
d.) Only tanks totally beneath the surface of the ground - Correct Answer - b.) The tank, all
connected piping, ancillary equipment and containment system
(H&SC, Sec 25281(z))
,The written report submitted to the local agency after an unauthorized release is required to
include the following except:
a.) Description of actions taken to stop the release
b.) Cause of the release
c.) Method of disposal of released product
d.) Date on which the release was discovered - Correct Answer - b.) Cause of the release
CCR Title 23, Sec 2652(c)
An unauthorized release which does not escape from secondary containment only requires a
record on the operator's monitoring reports provided:
A. It did not increase the hazard of fire
B. It did not cause any deterioration of the secondary containment
C. It was cleaned up within 8 hours of detection
D. All of the above - Correct Answer - D. All of the above
H&SC, Sec 25294
The annual monitoring certification may be performed by:
A. A person possessing the appropriate contractors licenses
B. An individual trained and certified by the manufacturer of the monitoring equipment
C. A designated UST operator
D. A person who meets the requirements of both a and b - Correct Answer - D. A person who
meets the requirements of both a and b
CCR Title 23, Sec 2715(i)
When an automatic tank gauge is utilized for single-walled tank leak detection, it shall generate a
post-test hard copy data report of the following information, except:
a.) Liquid volume
b.) Fuel depth
c.) Outside air temperature
d.) Time and date of test - Correct Answer - c.) Outside air temperature
CCR Title 23, Sec 2643(b)(1)
If a UST system is utilizing an overfill alarm, the alarm must be triggered to alert the transfer
operator when the tank is no more than ___________ full
,a.) 85%
b.) 95%
c.) 90%
d.) 80% - Correct Answer - c.) 90%
An automatic ftank fgauge fis futilized ffor fleak fdetection fof fthe f______________.
a.) fTank
b.) fTank fand fPiping
c.) fPiping
d.) fInterstitial fspace f- fCorrect f fAnswer f- fa.) fTank
CCR fTitle f23, fSec f2643(b)(1)
After fcompletion fof fenhanced fleak fdetection f(ELD) ftest, fthe fELD ftest fresults fmust fbe
fsubmitted fto fthe f_________________.
a.) fThe flocal fagency
b.) fThe fSWRCB
c.) fOwner fof fthe fUST fsystem
d.) fTo fboth fthe fSWRCB fand fthe flocal fagency f- fCorrect f fAnswer f- fd.) fTo fboth fthe fSWRCB
fand fthe flocal fagency
CCR fTitle f23, fSec f2644.1(a)(5)
A fpermit fto foperate fa fUST fsystem fmust fhave fall fof fthe ffollowing flisted fon fthe fpermit,
fEXCEPT:
a.) fThe fstate fUST fidentification fnumber(s)
b.) fName fof fthe ftank fmanufacturer fand ftank fcapacity
c.) fPermit fexpiration fdate
d.) fMonitoring frequirements f- fCorrect f fAnswer f- fb.) fName fof fthe ftank fmanufacturer fand
ftank fcapacity
CCR fTitle f23, fSec f2712(c)
A ftemporary fclosure fis fappropriate ffor fwhich fof fthe ffollowing:
a.) fThe fUST fsystem fis fempty fand fwill fbe fremoved ffrom fservice findefinitely
b.) fThe fUST fsystem fhas fceased fto fstore fhazardous fmaterials fbut fwill fbe fused fwithin fthe
fnext f12 fconsecutive fmonths
, c.) fThe fUST fsystem fis funable fto fmeet fcompliance frequirements fand fwill fbe fremoved
d.) fThe fUST fsystem fhas fbeen fred-tagged f- fCorrect f fAnswer f- fb.) fThe fUST fsystem fhas
fceased fto fstore fhazardous fmaterials fbut fwill fbe fused fwithin fthe fnext f12 fconsecutive fmonths
CCR fTitle f23, fSec f2671 f& f2670
A flocal fagency fdetermines fthat fa fUST ffacility fwithin fthe flast fyear fhad fcompliance fissues.
fPrior fto fissuing fa fnew fpermit for frenewal fto foperate fan fUST fthe flocal fagency fshall:
a.) fAsk fthe fstate fto fassist fin fa fjoint finspection
b.) fRequest fthe fowner/operator fto fsubmit fa f"Return fto fCompliance" fform.
c.) fRefer fto fa fDistrict fAttorney fInvestigator
d.) fInspect fthe ffacility fand fdetermine fcompliance f- fCorrect f fAnswer f- fd.) fInspect fthe ffacility
fand fdetermine fcompliance
CCR fTitle f23, fSec f2712(c)
All fthe ffollowing fcomponents frequire fthird fparty fcertification, fexcept:
a.) fAutomatic ftank fgauging fsystems
b.) fStatistical finventory freconciliation fmethods
c.) fSpill fContainment flids
d.) fLiquid fphase fout-of-tank fproducts f- fCorrect f fAnswer f- fc.) fSpill fContainment flids
The fexterior fsurface fof fan funderground fstorage ftank fmust fbear fa fmarking for flabel fwhich
fshows fthe ffollowing finformation, fexcept:
a.) fDesign fpressure fin fpsig
b.) fUseable fcapacity fin fgallons.
c.) fWidth fof fthe finterstitial fspace
d.) fIdentity fof fmanufacturer f- fCorrect f fAnswer f- fc.) fWidth fof fthe finterstitial fspace
CCR fTitle f23, fSec f2631(b)
Which fof fthe ffollowing fis fnot fa fconfined fspace:
a.) fA freally fdeep fturbine fsump
b.) fA fspace fnot fdesigned ffor fcontinuous femployee foccupancy
c.) fAn farea fwith flimited faccess
d.) fAn farea fwith flimited fventilation f- fCorrect f fAnswer f- fd.) fAn farea fwith flimited fventilation
CCR fTitle f8, fSec f5157(b)
