ICC U2 UST Decommissioning Exam Questions 2025 |
Actual Questions and Answers Latest Updated 2025
(Graded A+)
What is the purpose of interstitial monitoring:
a.) To detect leaks in the under-dispenser containment.
b.) To detect the presence of liquid between the primary and secondary containment.
c.) To monitor tank volume.
d.) To regulate 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)
A new underground storage tank means
a. An underground storage tank that was installed after December 22, 1998
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
The Federal Act is coded in what section of US Code?
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 are required to be labeled 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 necessary 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
CCR; 2621
The local agency inspection is conducted to ensure that the UST is in compliance with?
a. Title 40 CFR, Parts 280 & 281
b. Health & Safety Code, Chapter 6.11 and 23 CCR, Chapter 18
c. Title 23, Division 3, Chapter 16, Articles 3 or 4 as applicable and with all permit conditions
d. Health & Safety Code, Chapter 6.67 and 23 CCR, Chapter 18 - ANSWER-c. Title 23, Division 3,
Chapter 16, Articles 3 or 4 as applicable and with all permit conditions
CCR; 2712 (e)
Which of the following USTs must have evidence of financial responsibility?
a. A UST containing sodium hydroxide
b. A UST owned and operated by a State or Federal facility
c. A UST owned by the U.S. Navy
d. A County owned petroleum UST - ANSWER-d. A County owned petroleum UST
CCR; 2711 (a)(11) and H&SC 25292.2 (careful, petroleum containing USTs requirement is in chapter
6.75 &23 CCR, chapter 18)
All of the following are correct for single wall, pressurized, gasoline piping after December 22, 1998,
EXCEPT?
a. It must be monitored by an annual 0.1 gph test or monthly 0.2 gph test
b. It must be also be monitored by an hourly 3.0 gph test
c. The 3.0 gph monitoring shall restrict fuel flow or initiate an alarm if an unauthorized release occurs.
d. The 3.0 gph monitoring shall shut down the pump if it fails or is disconnected. - ANSWER-c. The 3.0
gph monitoring shall restrict fuel flow or initiate an alarm if an unauthorized release occurs.
CCR; 2643 (c) & 2666
All of the following are required for single wall pressurized piping automatic line leak detectors after
December 2, 1998, EXCEPT
a. Shuts down the pump when a release occurs
b. Shuts down the pump when if the LLD fails or is disconnected
c. Is capable of detecting a release equivalent to 3.0 gph.
d. Is capable of conducting a 0.1 gph test hourly - ANSWER-d. Is capable of conducting a 0.1 gph test
hourly
CCR; 2643 & 2666 (d. reads 0.1 gph hourly, not annually)
A 10,000-gallon, gasoline, single wall UST is routinely filled to 9,000-gallons. All of the following are
authorized monitoring alternative for single wall pressurized tanks, EXCEPT?
a. Monthly ATG 0.2 gph test when the tank contains 7,000 gallons of fuel.
b. Manual inventory reconciliation and a monthly ATG 0.1 gph test with 3 feet of product in the tank.
c. Monthly SIR 0.2 gph test with a biennial tank integrity test
d. Vadose zone monitoring with wells located in the backfill surrounding the tank. - ANSWER-a.
Monthly ATG 0.2 gph test when the tank contains 7,000 gallons of fuel.
CCR; 2643 (b)
Actual Questions and Answers Latest Updated 2025
(Graded A+)
What is the purpose of interstitial monitoring:
a.) To detect leaks in the under-dispenser containment.
b.) To detect the presence of liquid between the primary and secondary containment.
c.) To monitor tank volume.
d.) To regulate 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)
A new underground storage tank means
a. An underground storage tank that was installed after December 22, 1998
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
The Federal Act is coded in what section of US Code?
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 are required to be labeled 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 necessary 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
CCR; 2621
The local agency inspection is conducted to ensure that the UST is in compliance with?
a. Title 40 CFR, Parts 280 & 281
b. Health & Safety Code, Chapter 6.11 and 23 CCR, Chapter 18
c. Title 23, Division 3, Chapter 16, Articles 3 or 4 as applicable and with all permit conditions
d. Health & Safety Code, Chapter 6.67 and 23 CCR, Chapter 18 - ANSWER-c. Title 23, Division 3,
Chapter 16, Articles 3 or 4 as applicable and with all permit conditions
CCR; 2712 (e)
Which of the following USTs must have evidence of financial responsibility?
a. A UST containing sodium hydroxide
b. A UST owned and operated by a State or Federal facility
c. A UST owned by the U.S. Navy
d. A County owned petroleum UST - ANSWER-d. A County owned petroleum UST
CCR; 2711 (a)(11) and H&SC 25292.2 (careful, petroleum containing USTs requirement is in chapter
6.75 &23 CCR, chapter 18)
All of the following are correct for single wall, pressurized, gasoline piping after December 22, 1998,
EXCEPT?
a. It must be monitored by an annual 0.1 gph test or monthly 0.2 gph test
b. It must be also be monitored by an hourly 3.0 gph test
c. The 3.0 gph monitoring shall restrict fuel flow or initiate an alarm if an unauthorized release occurs.
d. The 3.0 gph monitoring shall shut down the pump if it fails or is disconnected. - ANSWER-c. The 3.0
gph monitoring shall restrict fuel flow or initiate an alarm if an unauthorized release occurs.
CCR; 2643 (c) & 2666
All of the following are required for single wall pressurized piping automatic line leak detectors after
December 2, 1998, EXCEPT
a. Shuts down the pump when a release occurs
b. Shuts down the pump when if the LLD fails or is disconnected
c. Is capable of detecting a release equivalent to 3.0 gph.
d. Is capable of conducting a 0.1 gph test hourly - ANSWER-d. Is capable of conducting a 0.1 gph test
hourly
CCR; 2643 & 2666 (d. reads 0.1 gph hourly, not annually)
A 10,000-gallon, gasoline, single wall UST is routinely filled to 9,000-gallons. All of the following are
authorized monitoring alternative for single wall pressurized tanks, EXCEPT?
a. Monthly ATG 0.2 gph test when the tank contains 7,000 gallons of fuel.
b. Manual inventory reconciliation and a monthly ATG 0.1 gph test with 3 feet of product in the tank.
c. Monthly SIR 0.2 gph test with a biennial tank integrity test
d. Vadose zone monitoring with wells located in the backfill surrounding the tank. - ANSWER-a.
Monthly ATG 0.2 gph test when the tank contains 7,000 gallons of fuel.
CCR; 2643 (b)
