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ICC CALIFORNIA UST INSPECTOR EXAM QUESTIONS WITH COMPLETE SOLUTION GUIDE (A+ GRADED | 100% VERIFIED) | LATEST VERSION 2026–2027

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Ace your ICC California UST Inspector Exam with this comprehensive study guide featuring practice questions and verified answers designed to support effective exam preparation. This resource covers the essential knowledge required for underground storage tank (UST) inspection and certification, including California UST regulations, installation requirements, inspection procedures, leak detection systems, corrosion protection, spill and overfill prevention, tank and piping systems, monitoring equipment, environmental compliance, maintenance requirements, repair standards, safety procedures, and applicable ICC and California codes. Ideal for UST inspectors, environmental professionals, contractors, code officials, and certification candidates, this organized study material helps reinforce critical inspection concepts, strengthen regulatory knowledge, improve exam readiness, and maximize your chances of success on the 2026/2027 ICC California UST Inspector Certification Examination.

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ICC California UST Inspector Exam

By definition an "underground storage tank system" b.) The tank, all connected piping, ancillary equipment and containment system
includes
a.) The tank, all connected piping and dispensers (H&SC, Sec 25281(z))
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




The written report submitted to the local agency after b.) Cause of the release
an unauthorized release is required to include the CCR Title 23, Sec 2652(c)
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


An unauthorized release which does not escape from D. All of the above
secondary containment only requires a record on the H&SC, Sec 25294
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


The annual monitoring certification may be performed D. A person who meets the requirements of both a and b
by: CCR Title 23, Sec 2715(i)
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


When an automatic tank gauge is utilized for single- c.) Outside air temperature
walled tank leak detection, it shall generate a post-test CCR Title 23, Sec 2643(b)(1)
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

, ICC California UST Inspector Exam

If a UST system is utilizing an overfill alarm, the alarm c.) 90%
must be triggered to alert the transfer operator when
the tank is no more than ___________ full
a.) 85%
b.) 95%
c.) 90%
d.) 80%


An automatic tank gauge is utilized for leak detection of a.) Tank
the ______________. CCR Title 23, Sec 2643(b)(1)
a.) Tank
b.) Tank and Piping
c.) Piping
d.) Interstitial space


After completion of enhanced leak detection (ELD) d.) To both the SWRCB and the local agency
test, the ELD test results must be submitted to the CCR Title 23, Sec 2644.1(a)(5)
_________________.
a.) The local agency
b.) The SWRCB
c.) Owner of the UST system
d.) To both the SWRCB and the local agency


A permit to operate a UST system must have all of the b.) Name of the tank manufacturer and tank capacity
following listed on the permit, EXCEPT: CCR Title 23, Sec 2712(c)
a.) The state UST identification number(s)
b.) Name of the tank manufacturer and tank capacity
c.) Permit expiration date
d.) Monitoring requirements


A temporary closure is appropriate for which of the b.) The UST system has ceased to store hazardous materials but will be used
following: within the next 12 consecutive months
a.) The UST system is empty and will be removed from CCR Title 23, Sec 2671 & 2670
service indefinitely
b.) The UST system has ceased to store hazardous
materials but will be used within the next 12 consecutive
months
c.) The UST system is unable to meet compliance
requirements and will be removed
d.) The UST system has been red-tagged

, ICC California UST Inspector Exam

A local agency determines that a UST facility within the d.) Inspect the facility and determine compliance
last year had compliance issues. Prior to issuing a new CCR Title 23, Sec 2712(c)
permit or renewal to operate an UST the local agency
shall:
a.) Ask the state to assist in a joint inspection
b.) Request the owner/operator to submit a "Return to
Compliance" form.
c.) Refer to a District Attorney Investigator
d.) Inspect the facility and determine compliance


All the following components require third party c.) Spill Containment lids
certification, except:
a.) Automatic tank gauging systems
b.) Statistical inventory reconciliation methods
c.) Spill Containment lids
d.) Liquid phase out-of-tank products


The exterior surface of an underground storage tank c.) Width of the interstitial space
must bear a marking or label which shows the following CCR Title 23, Sec 2631(b)
information, except:
a.) Design pressure in psig
b.) Useable capacity in gallons.
c.) Width of the interstitial space
d.) Identity of manufacturer


Which of the following is not a confined space: d.) An area with limited ventilation
a.) A really deep turbine sump CCR Title 8, Sec 5157(b)
b.) A space not designed for continuous employee
occupancy
c.) An area with limited access
d.) An area with limited ventilation


A secondary containment system which is not an d.) 150 percent
integral part of primary containment shall be designed CCR Title 23, Sec 2631(e)(1)(B)
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


All the following are approved overfill prevention b.) Spill Containers
systems, except: CCR Title 23, Sec 2635(b)(2)
a.) Automatic shutoff devices
b.) Spill Containers
c.) Overfill alarms
d.) Flapper valves

, ICC California UST Inspector Exam

Automatic line leak detectors shall be installed on c.) 3-gallon per hour leak rate at 10 psi within 1 hour.
underground pressurized piping with secondary CCR Title 23, Sec 2636(f)(2)(f)(3) & 2643(c)(1)
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.


Individuals installing an Underground Storage Tank a.) California Licensed Tank Tester
System shall meet all of the following, except: CCR Title 23, Sec 2715(g)(h)
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.


Which of the following would not require secondary a.) Interstitial space hydrostatically monitored
containment testing? CCR Title 23, Sec 2637(g)
a.) Interstitial space hydrostatically monitored
b.) Under-dispenser containment
c.) Turbine piping sump
d.) Secondary piping




Fiberglass tanks shall be repaired by the following, c.) A second layer of fiberglass cloth shall be installed directly over the primary
except: cloth layer and shall be cut to overlap the primary patch by 5 inches on all
a.) Small fractures and fissures may be repaired with sides.
epoxy CCR Title 23, Sec 2661(d)(4)
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.

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