1
ICC CALIFORNIA UST SERVICE TECHNICIAN EXAM
(ACTUAL 2025/2026) NEWEST QUESTIONS &
VERIFIED DETAILED ANSWERS
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)
Which of the following is considered an Underground Storage Tank?
a) Septic Tank
b) Petroleum Storage Tank
c) Farm Tank
d) Heating Oil Tank - correct-answer -(b) Petroleum Storage Tank
CCR Title 23, 2621 & HSC 25281(y)
, 2
A permit-required confined space has the following characteristics, EXCEPT?
a) contains or has a potential to contain a hazardous atmosphere
b) oxygen-deficient atmosphere
c) has potential for engulfing an entrant
d) has internal configuration such that an entrant would be trapped by inwardly
converging walls - correct-answer -(b) oxygen-deficient atmosphere
Section CCR Title 8, 5157(b), Permit-required confined space (permit space)
Any person who intentionally disables or tampers with a leak detection system in
a manner to prevent the system from detecting a leak is subject to a minimum
fine of:
a) $500
b) $1,000
c) $5,000
d) $10,000 - correct-answer -(c) $5,000
HSC, Chapter 6.7 Sec 25299(f)(2)
When an ATG system is used to monitor a tank for release detection, a 0.2
gallon/hour leak test must be performed:
a) at least once daily
, 3
b) at least once monthly
c) at least once yearly
d) as specified by the equipment manufacturer - correct-answer -(b) at least once
monthly
Section CCR Title 23, Sec 2643(b), and Operating & Maintaining UST Systems p.7
At what percentage of tank volume must the monitor alert at if the in-tank probe
is used for overfill prevention?
a) 85%
b) 90%
c) 95%
d) 100% - correct-answer -(b) 90%
23 CCR 2635 (c)(1)(A), (citation needs verification)
Which of the following is required to be reported to the local agency?
a) release of fuel to secondary containment which is able to cleaned in 8 hours or
less
b) release of fuel to the environment
c) presence of water in annular space
d) presence of fuel in spill bucket - correct-answer -(b) release of fuel to the
environment
, 4
23 CCR2650 (e), HSC 6.7 25294
Secondary containment is not required on suction piping which meets all of the
following, EXCEPT?
a) a check valve is located directly below suction pump
b) operating under less than atmospheric pressure
c) piping is sloped to drain back to a monitored sump
d) check valve located at tank bottom - correct-answer -d) check valve located at
tank bottom
23 CCR 2636(a)(3)
The designated operator must train the employees about all of the following
except:
a) best management practices
b) monitoring plan
c) permit conditions
d) leak response plan - correct-answer -c) permit conditions
23 CCR 2715(c)(1)
ICC CALIFORNIA UST SERVICE TECHNICIAN EXAM
(ACTUAL 2025/2026) NEWEST QUESTIONS &
VERIFIED DETAILED ANSWERS
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)
Which of the following is considered an Underground Storage Tank?
a) Septic Tank
b) Petroleum Storage Tank
c) Farm Tank
d) Heating Oil Tank - correct-answer -(b) Petroleum Storage Tank
CCR Title 23, 2621 & HSC 25281(y)
, 2
A permit-required confined space has the following characteristics, EXCEPT?
a) contains or has a potential to contain a hazardous atmosphere
b) oxygen-deficient atmosphere
c) has potential for engulfing an entrant
d) has internal configuration such that an entrant would be trapped by inwardly
converging walls - correct-answer -(b) oxygen-deficient atmosphere
Section CCR Title 8, 5157(b), Permit-required confined space (permit space)
Any person who intentionally disables or tampers with a leak detection system in
a manner to prevent the system from detecting a leak is subject to a minimum
fine of:
a) $500
b) $1,000
c) $5,000
d) $10,000 - correct-answer -(c) $5,000
HSC, Chapter 6.7 Sec 25299(f)(2)
When an ATG system is used to monitor a tank for release detection, a 0.2
gallon/hour leak test must be performed:
a) at least once daily
, 3
b) at least once monthly
c) at least once yearly
d) as specified by the equipment manufacturer - correct-answer -(b) at least once
monthly
Section CCR Title 23, Sec 2643(b), and Operating & Maintaining UST Systems p.7
At what percentage of tank volume must the monitor alert at if the in-tank probe
is used for overfill prevention?
a) 85%
b) 90%
c) 95%
d) 100% - correct-answer -(b) 90%
23 CCR 2635 (c)(1)(A), (citation needs verification)
Which of the following is required to be reported to the local agency?
a) release of fuel to secondary containment which is able to cleaned in 8 hours or
less
b) release of fuel to the environment
c) presence of water in annular space
d) presence of fuel in spill bucket - correct-answer -(b) release of fuel to the
environment
, 4
23 CCR2650 (e), HSC 6.7 25294
Secondary containment is not required on suction piping which meets all of the
following, EXCEPT?
a) a check valve is located directly below suction pump
b) operating under less than atmospheric pressure
c) piping is sloped to drain back to a monitored sump
d) check valve located at tank bottom - correct-answer -d) check valve located at
tank bottom
23 CCR 2636(a)(3)
The designated operator must train the employees about all of the following
except:
a) best management practices
b) monitoring plan
c) permit conditions
d) leak response plan - correct-answer -c) permit conditions
23 CCR 2715(c)(1)
