ICC CALIFORNIA UST SERVICE TECHNICIAN
EXAM NEWEST 2026 ACTUAL EXAM 100
QUESTIONS AND CORECT DETAILED
ANSWERS (VERIFIED ANSWERS)
1. Which agency oversees the California UST program?
Answer: California State Water Resources Control Board (SWRCB)
Rationale: SWRCB administers the UST program through local CUPAs.
2. California UST regulations are found primarily in:
Answer: CCR Title 23
Rationale: Title 23 contains California-specific UST requirements.
3. Federal UST regulations are located in:
Answer: 40 CFR Part 280
Rationale: EPA’s national UST standards.
4. Which agencies enforce UST regulations locally in California?
Answer: CUPAs
Rationale: Certified Unified Program Agencies perform inspections and enforcement.
5. Who must be ICC certified to service UST systems in California?
Answer: UST service technicians
Rationale: California requires ICC certification for service and testing.
,SECTION 2: UST SYSTEM COMPONENTS
6. A UST system includes:
Answer: Tank, piping, dispensers, and containment
Rationale: All components that store or convey fuel underground.
7. What material is commonly used for modern UST tanks?
Answer: Fiberglass-reinforced plastic (FRP)
Rationale: Corrosion-resistant and widely used.
8. Double-wall tanks provide:
Answer: Secondary containment
Rationale: Allows leak detection between walls.
9. Pressurized piping requires:
Answer: Automatic line leak detection
Rationale: Required under both federal and CA regulations.
10. What device shuts off fuel flow during a major leak?
Answer: Shear valve
Rationale: Activates when dispenser is impacted.
SECTION 3: RELEASE DETECTION REQUIREMENTS
11. How often must release detection be performed?
Answer: Monthly
Rationale: Required for tanks and piping.
, 12. Interstitial monitoring is used with:
Answer: Double-wall systems
Rationale: Monitors the space between primary and secondary walls.
13. What is the maximum allowable leak rate for piping?
Answer: 3 gallons per hour
Rationale: EPA performance standard.
14. Statistical inventory reconciliation (SIR) must detect leaks of:
Answer: 0.2 gallons per hour
Rationale: Federal detection threshold.
15. Manual tank gauging is limited to tanks up to:
Answer: 2,000 gallons
Rationale: Only allowed for small tanks.
SECTION 4: AUTOMATIC TANK GAUGING (ATG)
16. ATG systems must be tested how often in California?
Answer: Annually
Rationale: California requires annual functionality testing.
17. ATG probes measure:
Answer: Product level and temperature
Rationale: Used to calculate volume accurately.
EXAM NEWEST 2026 ACTUAL EXAM 100
QUESTIONS AND CORECT DETAILED
ANSWERS (VERIFIED ANSWERS)
1. Which agency oversees the California UST program?
Answer: California State Water Resources Control Board (SWRCB)
Rationale: SWRCB administers the UST program through local CUPAs.
2. California UST regulations are found primarily in:
Answer: CCR Title 23
Rationale: Title 23 contains California-specific UST requirements.
3. Federal UST regulations are located in:
Answer: 40 CFR Part 280
Rationale: EPA’s national UST standards.
4. Which agencies enforce UST regulations locally in California?
Answer: CUPAs
Rationale: Certified Unified Program Agencies perform inspections and enforcement.
5. Who must be ICC certified to service UST systems in California?
Answer: UST service technicians
Rationale: California requires ICC certification for service and testing.
,SECTION 2: UST SYSTEM COMPONENTS
6. A UST system includes:
Answer: Tank, piping, dispensers, and containment
Rationale: All components that store or convey fuel underground.
7. What material is commonly used for modern UST tanks?
Answer: Fiberglass-reinforced plastic (FRP)
Rationale: Corrosion-resistant and widely used.
8. Double-wall tanks provide:
Answer: Secondary containment
Rationale: Allows leak detection between walls.
9. Pressurized piping requires:
Answer: Automatic line leak detection
Rationale: Required under both federal and CA regulations.
10. What device shuts off fuel flow during a major leak?
Answer: Shear valve
Rationale: Activates when dispenser is impacted.
SECTION 3: RELEASE DETECTION REQUIREMENTS
11. How often must release detection be performed?
Answer: Monthly
Rationale: Required for tanks and piping.
, 12. Interstitial monitoring is used with:
Answer: Double-wall systems
Rationale: Monitors the space between primary and secondary walls.
13. What is the maximum allowable leak rate for piping?
Answer: 3 gallons per hour
Rationale: EPA performance standard.
14. Statistical inventory reconciliation (SIR) must detect leaks of:
Answer: 0.2 gallons per hour
Rationale: Federal detection threshold.
15. Manual tank gauging is limited to tanks up to:
Answer: 2,000 gallons
Rationale: Only allowed for small tanks.
SECTION 4: AUTOMATIC TANK GAUGING (ATG)
16. ATG systems must be tested how often in California?
Answer: Annually
Rationale: California requires annual functionality testing.
17. ATG probes measure:
Answer: Product level and temperature
Rationale: Used to calculate volume accurately.
