UST UPDATED 2026 EXAM SCRIPT QUESTIONS AND ANSWERS RATED

UST UPDATED 2026 EXAM SCRIPT QUESTIONS AND
ANSWERS RATED A+
✔✔After completion of enhanced leak detection (ELD) test, the ELD test results must be
submitted to the _________________.
a.) The local agency
b.) The SWRCB
c.) Owner of the UST system
d.) To both the SWRCB and the local agency - ✔✔d.) To both the SWRCB and the local
agency
CCR Title 23, Sec 2644.1(a)(5)

✔✔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

✔✔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)

✔✔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
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)

✔✔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 - ✔✔a.) Interstitial space hydrostatically monitored
CCR Title 23, Sec 2637(g)

✔✔Fiberglass tanks shall be repaired by the following, except:
a.) Small fractures and fissures may be repaired with epoxy
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. - ✔✔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.
CCR Title 23, Sec 2661(d)(4)

✔✔Automatic line leak detectors shall be installed on underground pressurized piping
and shall be capable of detecting a 3-gallon per hour leak rate at 10 psi within 1 hour
with a probability of detection of at least ______% and a probability of false alarm no
greater than _______%.
a.) 95, 5
b.) 98, 2
c.) 5, 95
d.) 2, 98 - ✔✔a.) 95, 5
CCR Title 23, Sec 2636(f)(2) & 2643(c)(1)

✔✔An emergency impact valve (shear valve) is found in the following location on an
UST System.
a.) At the turbine piping termination
b.) Base of the dispenser
c.) Under the extractor tee
d.) Spill container - ✔✔b.) Base of the dispenser