ICC-CA-USTI INTERNATIONAL CODE COUNCIL (ICC) CALIFORNIA
UNDERGROUND STORAGE TANK (UST) INSPECTOR
CERTIFICATION EXAMINATION| 2025/2026
Professional / Regulatory Compliance
A permit to operate a UST system must have all of the following listed on the permit, EXCEPT:
a.) The state UST identification number(s)
b.) Name of the tank manufacturer and tank capacity
c.) Permit expiration date
d.) Monitoring requirements
b.) Name of the tank manufacturer and tank capacity
CCR Title 23, Sec 2712(c)
A temporary closure is appropriate for which of the following:
a.) The UST system is empty and will be removed from 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
b.) The UST system has ceased to store hazardous materials but will be used within the next 12
consecutive months
CCR Title 23, Sec 2671 & 2670
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,A local agency determines that a UST facility within the last year had compliance issues. Prior to
issuing a new 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
d.) Inspect the facility and determine compliance
CCR Title 23, Sec 2712(c)
All the following components require third party certification, except:
a.) Automatic tank gauging systems
b.) Statistical inventory reconciliation methods
c.) Spill Containment lids
d.) Liquid phase out-of-tank products
c.) Spill Containment lids
The exterior surface of an underground storage tank must bear a marking or label which shows
the following information, except:
a.) Design pressure in psig
b.) Useable capacity in gallons.
c.) Width of the interstitial space
d.) Identity of manufacturer
c.) Width of the interstitial space
CCR Title 23, Sec 2631(b)
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,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
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
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
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, d.) Flapper valves
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.
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.
a.) California Licensed Tank Tester
CCR Title 23, Sec 2715(g)(h)
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UNDERGROUND STORAGE TANK (UST) INSPECTOR
CERTIFICATION EXAMINATION| 2025/2026
Professional / Regulatory Compliance
A permit to operate a UST system must have all of the following listed on the permit, EXCEPT:
a.) The state UST identification number(s)
b.) Name of the tank manufacturer and tank capacity
c.) Permit expiration date
d.) Monitoring requirements
b.) Name of the tank manufacturer and tank capacity
CCR Title 23, Sec 2712(c)
A temporary closure is appropriate for which of the following:
a.) The UST system is empty and will be removed from 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
b.) The UST system has ceased to store hazardous materials but will be used within the next 12
consecutive months
CCR Title 23, Sec 2671 & 2670
1|Page
,A local agency determines that a UST facility within the last year had compliance issues. Prior to
issuing a new 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
d.) Inspect the facility and determine compliance
CCR Title 23, Sec 2712(c)
All the following components require third party certification, except:
a.) Automatic tank gauging systems
b.) Statistical inventory reconciliation methods
c.) Spill Containment lids
d.) Liquid phase out-of-tank products
c.) Spill Containment lids
The exterior surface of an underground storage tank must bear a marking or label which shows
the following information, except:
a.) Design pressure in psig
b.) Useable capacity in gallons.
c.) Width of the interstitial space
d.) Identity of manufacturer
c.) Width of the interstitial space
CCR Title 23, Sec 2631(b)
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,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
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
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
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, d.) Flapper valves
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.
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.
a.) California Licensed Tank Tester
CCR Title 23, Sec 2715(g)(h)
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