UST INSPECTOR EXAM
QUESTIONS AND ANSWERS 2026\2027
Which of the following is not a confined space:
a.) A really deep turbine sump
b.) A space not designed for continuous employee occupancy
c.) An area with limited access
d.) An area with limited ventilation - correct answer- d.) An area with limited
ventilation
CCR Title 8, Sec 5157(b)
A secondary containment system which is not an integral part of primary
containment shall be designed and constructed according to an engineering
specification approved by a third party. The secondary containment system
shall contain
of the volume of the largest primary container within it,
in the case of multiple primary containers:
a.) 100 percent
b.) 10 percent
c.) 110 percent
d.) 150 percent - correct answer- d.) 150 percent CCR Title
23, Sec 2631(e)(1)(B)
,All the following are approved overfill prevention systems, except:
a.) Automatic shutoff devices
b.) Spill Containers
c.) Overfill alarms
d.) Flapper valves - correct answer- b.) Spill Containers CCR Title 23,
Sec 2635(b)(2)
Automatic line leak detectors shall be installed on underground pressurized
piping with secondary containment and shall be capable of detecting a:
a.) 3-gallon per hour leak rate at 5 psi within 1 hour.
b.) .1-gallon per hour leak rate at 5 psi within 1 hour.
c.) 3-gallon per hour leak rate at 10 psi within 1 hour.
d.) .1-gallon per hour leak rate at 10 psi within 1 hour. - correct answer- c.) 3-
gallon per hour leak rate at 10 psi within 1 hour.
CCR Title 23, Sec 2636(f)(2)(f)(3) & 2643(c)(1)
Individuals installing an Underground Storage Tank System shall meet all of the
following, except:
a.) California Licensed Tank Tester
b.) Possess the appropriate Contractors State License Board license.
c.) Effective January 1, 2005, the individual shall possess a current
underground storage tank system installer certificate from the ICC UST
Installation/Retrofitting exam.
d.) The individual has been adequately trained as evidenced by a certificate of
training issued by the manufacturer(s) of the underground storage tank
system component(s) being
installed. - correct answer- a.) California Licensed Tank Tester CCR Title 23, Sec
2715(g)(h)
,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 - correct answer- a.) Interstitial space
hydrostatically monitored
CCR Title 23, Sec 2637(g)
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
v v v v v v v
a.) The tank, all connected piping and dispensers
v v v v v v
QUESTIONS AND ANSWERS 2026\2027
Which of the following is not a confined space:
a.) A really deep turbine sump
b.) A space not designed for continuous employee occupancy
c.) An area with limited access
d.) An area with limited ventilation - correct answer- d.) An area with limited
ventilation
CCR Title 8, Sec 5157(b)
A secondary containment system which is not an integral part of primary
containment shall be designed and constructed according to an engineering
specification approved by a third party. The secondary containment system
shall contain
of the volume of the largest primary container within it,
in the case of multiple primary containers:
a.) 100 percent
b.) 10 percent
c.) 110 percent
d.) 150 percent - correct answer- d.) 150 percent CCR Title
23, Sec 2631(e)(1)(B)
,All the following are approved overfill prevention systems, except:
a.) Automatic shutoff devices
b.) Spill Containers
c.) Overfill alarms
d.) Flapper valves - correct answer- b.) Spill Containers CCR Title 23,
Sec 2635(b)(2)
Automatic line leak detectors shall be installed on underground pressurized
piping with secondary containment and shall be capable of detecting a:
a.) 3-gallon per hour leak rate at 5 psi within 1 hour.
b.) .1-gallon per hour leak rate at 5 psi within 1 hour.
c.) 3-gallon per hour leak rate at 10 psi within 1 hour.
d.) .1-gallon per hour leak rate at 10 psi within 1 hour. - correct answer- c.) 3-
gallon per hour leak rate at 10 psi within 1 hour.
CCR Title 23, Sec 2636(f)(2)(f)(3) & 2643(c)(1)
Individuals installing an Underground Storage Tank System shall meet all of the
following, except:
a.) California Licensed Tank Tester
b.) Possess the appropriate Contractors State License Board license.
c.) Effective January 1, 2005, the individual shall possess a current
underground storage tank system installer certificate from the ICC UST
Installation/Retrofitting exam.
d.) The individual has been adequately trained as evidenced by a certificate of
training issued by the manufacturer(s) of the underground storage tank
system component(s) being
installed. - correct answer- a.) California Licensed Tank Tester CCR Title 23, Sec
2715(g)(h)
,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 - correct answer- a.) Interstitial space
hydrostatically monitored
CCR Title 23, Sec 2637(g)
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
v v v v v v v
a.) The tank, all connected piping and dispensers
v v v v v v
