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Exam (elaborations)

ICC California UST Inspector Exam with Complete Solutions 100% Correct | Latest 2025/2026 Update | A+ Graded Q&A

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This comprehensive exam preparation guide is designed for candidates preparing for the ICC California UST (Underground Storage Tank) Inspector Certification. The content is updated for the 2025/2026 testing cycle and contains 390+ verified exam-style questions with complete solutions and detailed rationales, providing an in-depth review of the knowledge required for certification . The material covers the full scope of the ICC exam, aligned with the official job task analysis, including California-specific regulations under CCR Title 23 and H&SC requirements. Key topic areas include UST Inspector qualifications (7%), UST System Components and Design (10%), Compliance Inspection and Administrative Procedures (28%), Periodic Testing and Evaluation (25%), Health and Safety (5%), Installation, Closures, Repairs, and Upgrades (17%), and Education and Enforcement (8%) . Sample Questions (from the exam): 1. 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 Answer: a — CCR Title 23, Sec 2681(a) . 2. 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 Answer: b — California enforces its own specific, more stringent rules under CCR Title 23, Chapter 16 . 3. 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 Answer: b — H&SC, Sec 25281(z) . 4. 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% Answer: c — CCR Title 23, Sec 2635(b)(2)(A) .

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ICC California UST Inspector Exam With Complete Solutions
100% Correct Latest Update


Single-wall UST Systems containing the following shall be upgraded to double-wall UST
Systems except for:

a.) Tanks containing liquids with a pH>13

b.) Waste oil tanks

c.) Solvent tanks

d.) Motor vehicle fuel tanks - ANSWER d.) Motor vehicle fuel tanks

CCR Title 23, Sec 2662(b)

What is interstitial monitoring used for:

a) To detect under-dispenser containment leaks.

b.) To detect the presence of liquid between the primary and secondary containment.

c.) To monitor tank volume.

d.) To control fuel flow to the dispenser. - ANSWER b.) To detect the presence of liquid
between the primary and secondary containment.



CCR Title 23, Sec 2611

'Interstitial space' & 2632(b)

Underground storage tank that is installed after December 22, 1998 means

b. An underground storage tank that was installed after 1987

c. An underground storage tank that is not an existing underground storage

d. An underground storage tank that was installed after July 1, 2003 - ANSWER c. An
underground storage tank that is not an existing underground storage



CCR Title 23, Sec 2611

,The Federal law governing underground storage tank is know as:

a. The Underground Storage of Hazardous Substances Control Act

b. The Clean Water Act

c. The Safe Drinking Water Act

d. The Resource Conservation and Recovery Act, Subtitle I - ANSWER d. The Resource
Conservation and Recovery Act, Subtitle I



Which section of US Code is the Federal Act coded in?



a. The Underground Storage of Hazardous Substances Control Act

b. The Clean Water Act

c. The Safe Drinking Water Act

d. Subchapter IX of chapter 82 of Title 42 of the United States Code, as added by the
Hazardous and Solid Waste Amendments of 1984, or as it may subsequently be
amended or supplemented. - ANSWER d. Subchapter IX of chapter 82 of Title 42 of the
United States Code, as added by the Hazardous and Solid Waste Amendments of 1984,
or as it may subsequently be amended or supplemented.



H≻ 25281



California law requires that underground storage tanks be inspected every



a. Three years by the local agency.

b. Year by the designated operator

c. Year by the local agency

d. Two years by the local agency - ANSWER c. Year by the local agency



H≻ 25288

,Secondary containment was required for hazardous substance and petroleum
underground storage tanks installed after



a. December 22, 1998

b. July 1, 1991 for underground storage tanks and January 1, 1992 for piping

c. January 1, 1984

d. January 1, 2002 - ANSWER c. January 1, 1984



H≻ 25291 (a)



Secondary containment was required for all pressurized, petroleum underground piping
installed after



a. December 22, 1998

b. July 1, 2003

c. January 1, 1984

d. July 1, 1987 - ANSWER d. July 1, 1987



H≻ 25291 (a)(7)(E)



All of the following shall be marked on the exterior surface of an underground storage
tank, EXCEPT?



a. Maximum operating temperature in degrees Fahrenheit

b. Nominal Capacity in gallons

c. Useable capacity in gallons

d. City and State of manufacture - ANSWER d. City and State of manufacture

, CCR; 2631 (b)



What is the minimum thickness of a steel of a striker plate?

a. 1/8 inch

b. 2 inches lager than the opening it lies beneath

c. ¼ inch

d. ½ inch - ANSWER a. 1/8 inch



CCR; 2631 (c)



All of the following is required to be included in an UST written monitoring procedure,
EXCEPT:



a. The methods and equipment, identified by name and model

b. The names and titles of the persons responsible for monitoring the equipment.

c. The name of the emergency coordinator

d. A description of the training required for the operation of the tank system. - ANSWER
c. The name of the emergency coordinator



CCR; 2632



All of the following are exempt from regulation as an UST, EXCEPT:



a. A 1000 gallon UST on a farm

b. Drums in basements that contain 55 gallons or less

c. Liquid asphalt tank

d. A bulk field constructed UST - ANSWER d. A bulk field constructed UST

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