USTS LATEST UPDATED 2025/2026 EXAM
QUESTIONS AND ANSWERS 100%
GRADED AT A+
1. 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 - ANSWER d.) 150 percent
CCR Title 23, Sec 2631(e)(1)(B)
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 Code of Regulations; 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.)
The tank, all connected piping, ancillary equipment and containment
system
(H&SC, Sec 25281(z))
4 .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 - ANSWER b.) Cause of
the release
CCR Title 23, Sec 2652(c)
5. 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 - ANSWER D. All of the above
H&SC, Sec 25294
6. 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 - ANSWER D.
A person who meets the requirements of both a and b
CCR Title 23, Sec 2715(i)
,7. 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 - ANSWER c.) Outside air temperature
CCR Title 23, Sec 2643(b)(1)
8. 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.) 90%
9. An automatic tank gauge is utilized for leak detection of the
______________.
a.) Tank
b.) Tank and Piping
c.) Piping
d.) Interstitial space - ANSWER a.) Tank
CCR Title 23, Sec 2643(b)(1)
10. 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 - ANSWER d.) To both
the SWRCB and the local agency
CCR Title 23, Sec 2644.1(a)(5)
, 11. 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 - ANSWER b.) Name of the tank
manufacturer and tank capacity
CCR Title 23, Sec 2712(c)
12. 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 - 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
13. 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 - ANSWER d.) Inspect
the facility and determine compliance
CCR Title 23, Sec 2712(c)
14. All the following are approved overfill prevention systems, except:
a.) Automatic shutoff devices
b.) Spill Containers
QUESTIONS AND ANSWERS 100%
GRADED AT A+
1. 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 - ANSWER d.) 150 percent
CCR Title 23, Sec 2631(e)(1)(B)
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 Code of Regulations; 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.)
The tank, all connected piping, ancillary equipment and containment
system
(H&SC, Sec 25281(z))
4 .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 - ANSWER b.) Cause of
the release
CCR Title 23, Sec 2652(c)
5. 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 - ANSWER D. All of the above
H&SC, Sec 25294
6. 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 - ANSWER D.
A person who meets the requirements of both a and b
CCR Title 23, Sec 2715(i)
,7. 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 - ANSWER c.) Outside air temperature
CCR Title 23, Sec 2643(b)(1)
8. 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.) 90%
9. An automatic tank gauge is utilized for leak detection of the
______________.
a.) Tank
b.) Tank and Piping
c.) Piping
d.) Interstitial space - ANSWER a.) Tank
CCR Title 23, Sec 2643(b)(1)
10. 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 - ANSWER d.) To both
the SWRCB and the local agency
CCR Title 23, Sec 2644.1(a)(5)
, 11. 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 - ANSWER b.) Name of the tank
manufacturer and tank capacity
CCR Title 23, Sec 2712(c)
12. 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 - 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
13. 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 - ANSWER d.) Inspect
the facility and determine compliance
CCR Title 23, Sec 2712(c)
14. All the following are approved overfill prevention systems, except:
a.) Automatic shutoff devices
b.) Spill Containers
