ICC California UST Inspector Exam Questions and Answers 100%
Correct 2026/2027 Version.
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
a.) The tank, all connected piping and dispensers
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 - Correct Answer - b. ank, all connected piping, ancillary equipment and
containment system
(H&SC, Sec 25281(z))
The written report submitted to the local agency after an unauthorized release is required to include the 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 - Correct Answer - b.) Cause of the release
CCR Title 23, Sec 2652(c)
An unauthorized release which does not escape from secondary containment only requires a record on the 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 - Correct Answer - D. All of the above
H&SC, Sec 25294
The annual monitoring certification may be performed by:
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 - Correct Answer - D. A person who meets the requirements of both a and b
CCR Title 23, Sec 2715(i)
When an automatic tank gauge is utilized for single-walled tank leak detection, it shall generate a post-test 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 - Correct Answer - c.) Outside air temperature
,ICC California UST Inspector Exam Questions and Answers 100% Correct 2024\2025 Version.
CCR Title 23, Sec 2643(b)(1)
If a UST system is utilizing an overfill alarm, the alarm must be triggered to alert the transfer operator when the tank is no more than
full
a.) 85%
b.) 95%
c.) 90%
d.) 80% - Correct Answer - c.) 90%
An automatic tank gauge is utilized for leak detection of the .
a.) Tank
b.) Tank and Piping
c.) Piping
d.) Interstitial space - Correct Answer - a.) Tank
CCR Title 23, Sec 2643(b)(1)
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 - Correct Answer - 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 - Correct Answer - 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 - Correct Answer - 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 - Correct Answer - 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 - Correct Answer - 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 - Correct Answer - 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 - Correct Answer - d.) An area with limited ventilation
CCR Title 8, Sec 5157(b)
,ICC California UST Inspector Exam Questions and Answers 100% Correct 2024\2025 Version.
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 detectin
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 storag
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)
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. - Correct Answer -
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 rat
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 - Correct Answer - 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 - Correct Answer - b.) Base of the dispenser
, ICC California UST Inspector Exam Questions and Answers 100% Correct 2024\2025 Version.
Notification to perform a secondary containment test must be given to the local agency by:
a.) A service technician or a licensed tank tester.
b.) Cathodic protection tester.
c.) Owner/operator of UST.
d.) State Water Resources Control Board. - Correct Answer - c.) Owner/operator of UST
CCR Title 23, Sec 2637(f)
An owner or operator of an underground storage tank or any part thereof that is destined for a specific reuse shall advise the local agency, withi
the time frame specified by that agency, of all of the following, except:
a.) The nature of intended use
b.) The name of the new owner and new operator of the UST
c.) The location of intended use
d.) The State Water Resources Control Board must be advised not the local agency - Correct Answer - d.) The State Water Resources Control
Board must be advised not the local agency
CCR Title 23, Sec 2672(b)(4)
Any person(s) installing underground storage tank systems or components shall be certified or licensed by:
a.) The Contractors State License Board
b.) The local agency
c.) The State Water Resources Control Board
d.) The Regional Water Quality Board - Correct Answer - a.) The Contractors State License Board
CCR Title 23, Sec 2715(g)
The designated UST operator(s) shall perform monthly visual inspections of all UST's for which they are designated. The monthly visual
inspection shall include all of the following, except:
a.) Inspecting for the presence of hazardous substances, water, or debris in spill containers.
b.) By July 1, 2005, verify that all facility employees have been trained.
c.) Reviewing the alarm history report or log for the previous month.
d.) Inspecting for the presence of hazardous substances, water, or debris in containment sumps regardless of documentation showing each
alarm for the previous month has been responded to appropriately. - Correct Answer - d.) Inspecting for the presence of hazardous substances
water, or debris in containment sumps regardless of documentation showing each alarm for the previous month has been responded to
appropriately.
CCR Title 23, Sec 2715(c)
The following statements are true about the certification of monitoring equipment, except:
a.) The certification is an annual requirement.
b.) The certification shall be made on a "Monitoring System Certification" form.
c.) UST owners and operators shall submit a completed
"Monitoring System Certification" form to the local agency
within 30 days after completion of the inspection.
d.) The "Monitoring System Certification" form must be posted. - Correct Answer - d.) The "Monitoring System Certification" form must be
posted.
CCR Title 23, Sec 2638, 2641(j)
Field-installed cathodic protection systems shall be designed and certified as adequate by a:
a.) Cathodic protection tester.
b.) A corrosion specialist.
c.) Owner/Operator.
d.) A service technician or a licensed tank tester. - Correct Answer - b.) A corrosion specialist
CCR Title 23, Sec 2635(a)(2)(A)
A facility has a single wall tank and has chosen statistical reconciliation plus tank integrity testing as their quantitative release detection method.
The following statements are false about this method, except:
a.) A tank integrity test shall be conducted once every year.
b.) Statistical inventory reconciliation shall be conducted at least once per month in accordance with section 2646.1.
c.) The SIR method shall be capable of detecting a release of 0.1 gallon per hour.
d.) The product level in the tank is at least 5 feet. - Correct Answer - b.) Statistical inventory reconciliation shall be conducted at least once per
month in accordance with section 2646.1.
CCR Title 23, Sec 2643(b)(3)
The designated UST operator must train the employees about all of the following, except:
a.) Permit conditions
b.) Monitoring plan
Correct 2026/2027 Version.
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
a.) The tank, all connected piping and dispensers
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 - Correct Answer - b. ank, all connected piping, ancillary equipment and
containment system
(H&SC, Sec 25281(z))
The written report submitted to the local agency after an unauthorized release is required to include the 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 - Correct Answer - b.) Cause of the release
CCR Title 23, Sec 2652(c)
An unauthorized release which does not escape from secondary containment only requires a record on the 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 - Correct Answer - D. All of the above
H&SC, Sec 25294
The annual monitoring certification may be performed by:
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 - Correct Answer - D. A person who meets the requirements of both a and b
CCR Title 23, Sec 2715(i)
When an automatic tank gauge is utilized for single-walled tank leak detection, it shall generate a post-test 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 - Correct Answer - c.) Outside air temperature
,ICC California UST Inspector Exam Questions and Answers 100% Correct 2024\2025 Version.
CCR Title 23, Sec 2643(b)(1)
If a UST system is utilizing an overfill alarm, the alarm must be triggered to alert the transfer operator when the tank is no more than
full
a.) 85%
b.) 95%
c.) 90%
d.) 80% - Correct Answer - c.) 90%
An automatic tank gauge is utilized for leak detection of the .
a.) Tank
b.) Tank and Piping
c.) Piping
d.) Interstitial space - Correct Answer - a.) Tank
CCR Title 23, Sec 2643(b)(1)
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 - Correct Answer - 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 - Correct Answer - 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 - Correct Answer - 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 - Correct Answer - 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 - Correct Answer - 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 - Correct Answer - 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 - Correct Answer - d.) An area with limited ventilation
CCR Title 8, Sec 5157(b)
,ICC California UST Inspector Exam Questions and Answers 100% Correct 2024\2025 Version.
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 detectin
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 storag
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)
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. - Correct Answer -
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 rat
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 - Correct Answer - 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 - Correct Answer - b.) Base of the dispenser
, ICC California UST Inspector Exam Questions and Answers 100% Correct 2024\2025 Version.
Notification to perform a secondary containment test must be given to the local agency by:
a.) A service technician or a licensed tank tester.
b.) Cathodic protection tester.
c.) Owner/operator of UST.
d.) State Water Resources Control Board. - Correct Answer - c.) Owner/operator of UST
CCR Title 23, Sec 2637(f)
An owner or operator of an underground storage tank or any part thereof that is destined for a specific reuse shall advise the local agency, withi
the time frame specified by that agency, of all of the following, except:
a.) The nature of intended use
b.) The name of the new owner and new operator of the UST
c.) The location of intended use
d.) The State Water Resources Control Board must be advised not the local agency - Correct Answer - d.) The State Water Resources Control
Board must be advised not the local agency
CCR Title 23, Sec 2672(b)(4)
Any person(s) installing underground storage tank systems or components shall be certified or licensed by:
a.) The Contractors State License Board
b.) The local agency
c.) The State Water Resources Control Board
d.) The Regional Water Quality Board - Correct Answer - a.) The Contractors State License Board
CCR Title 23, Sec 2715(g)
The designated UST operator(s) shall perform monthly visual inspections of all UST's for which they are designated. The monthly visual
inspection shall include all of the following, except:
a.) Inspecting for the presence of hazardous substances, water, or debris in spill containers.
b.) By July 1, 2005, verify that all facility employees have been trained.
c.) Reviewing the alarm history report or log for the previous month.
d.) Inspecting for the presence of hazardous substances, water, or debris in containment sumps regardless of documentation showing each
alarm for the previous month has been responded to appropriately. - Correct Answer - d.) Inspecting for the presence of hazardous substances
water, or debris in containment sumps regardless of documentation showing each alarm for the previous month has been responded to
appropriately.
CCR Title 23, Sec 2715(c)
The following statements are true about the certification of monitoring equipment, except:
a.) The certification is an annual requirement.
b.) The certification shall be made on a "Monitoring System Certification" form.
c.) UST owners and operators shall submit a completed
"Monitoring System Certification" form to the local agency
within 30 days after completion of the inspection.
d.) The "Monitoring System Certification" form must be posted. - Correct Answer - d.) The "Monitoring System Certification" form must be
posted.
CCR Title 23, Sec 2638, 2641(j)
Field-installed cathodic protection systems shall be designed and certified as adequate by a:
a.) Cathodic protection tester.
b.) A corrosion specialist.
c.) Owner/Operator.
d.) A service technician or a licensed tank tester. - Correct Answer - b.) A corrosion specialist
CCR Title 23, Sec 2635(a)(2)(A)
A facility has a single wall tank and has chosen statistical reconciliation plus tank integrity testing as their quantitative release detection method.
The following statements are false about this method, except:
a.) A tank integrity test shall be conducted once every year.
b.) Statistical inventory reconciliation shall be conducted at least once per month in accordance with section 2646.1.
c.) The SIR method shall be capable of detecting a release of 0.1 gallon per hour.
d.) The product level in the tank is at least 5 feet. - Correct Answer - b.) Statistical inventory reconciliation shall be conducted at least once per
month in accordance with section 2646.1.
CCR Title 23, Sec 2643(b)(3)
The designated UST operator must train the employees about all of the following, except:
a.) Permit conditions
b.) Monitoring plan
