UST INSPECTOR EXAM STUDY GUIDE 2026
UPDATED QUESTIONS AND ANSWERS
EXPERT VERIFIED GRADED A+
⩥ Who must demonstrate that a UST system is compatible with a
hazardous substance?
A. Independent testing organization
B. Tank manufacture
C. State registered professional engineer
D. Owner or operator.
Answer: D. Owner or operator
§ 2631(l). Design and Construction Requirements for New Underground
Storage Tanks
(l) On and after October 1, 2018, owners or operators shall demonstrate
compatibility, 30 days before beginning to store or changing the
hazardous substance, for all components used to construct the
underground storage tank system which may come into contact with the
hazardous substance to be stored and are not subject to subdivisions (b)
or (d) above, such as spill containers, overfill prevention equipment, and
ancillary equipment, by submitting to the local agency one of the
following:
(1) A written approval from an independent testing organization, cont.
,(2) A written approval from a state registered professional engineer for
use with the hazardous substance to be stored.
(3) A written affirmative statement of compatibility from the
manufacturer(s) of the components for use with the hazardous substance
to be stored.
⩥ What would an operator/owner not have in their monitoring and
response plan?
A. A description of the training necessary for the operation of both the
tank system and the monitoring equipment
B. The certifications of the person(s) responsible for performing the
monitoring and/or maintaining the equipment
C. The frequency of performing the monitoring
D. The methods and equipment to be used for performing the
monitoring..
Answer: B. The certifications of the person(s) responsible for
performing the monitoring and/or maintaining the equipment
§ 2634(d)(2). Monitoring and Response Plan Requirements for New
Underground Storage Tanks Containing Motor Vehicle Fuel and
Constructed Pursuant to Section 2633
(2) The owner or operator shall prepare a written procedure for routine
monitoring, submitted on the "Underground Storage Tank Monitoring
Plan" in Title 27, Division 3, Subdivision 1, Chapter 6, which
establishes:
(A) The frequency of performing the monitoring;
,(B) The methods and equipment to be used for performing the
monitoring;
(C) The location(s) where the monitoring will be performed;
(D) The name(s) and title(s) of the person(s) responsible for performing
the monitoring and/or maintaining the equipment;
(E) The reporting format;
(F) The preventive maintenance schedule for the monitoring equipment.
The maintenance schedule shall be in accordance with the
manufacturer's instructions; and
(G) A description of the training necessary for the operation of both the
tank system and the monitoring equipment.
⩥ What equipment are tested for tightness before being installed at a
UST facility?
A. UDC
B. Piping
C. Tanks
D. Flex connectors.
Answer: C. Tanks
2635(a)(3). Installation and Testing Requirements for All New
Underground Storage Tanks
(3) Before installation, the tank shall be tested for tightness at the
installation site in accordance with the manufacturer's written guidelines.
, If there are no guidelines, the primary and secondary containment shall
be tested for tightness with air pressure at not less than three pounds per
square inch (20.68 kilopascals) and not more than five pounds per
square inch (34.48 kilopascals). In lieu of the above, an equivalent
differential pressure test, expressed in inches of mercury vacuum, in the
interstitial space of the secondary containment, is acceptable. The
pressure (or vacuum in the interstitial space) shall be maintained for a
minimum of 30 minutes to determine if the tank is tight. If a tank fails
the tightness test, as evidenced by soap bubbles, or water droplets,
installation shall be suspended until the tank is replaced or repaired by a
factory authorized repair service. Following repair or replacement, the
tank shall pass a tightness test.
⩥ Which of the following is a requirement for spill containers?
A) Capacity of 19 gallons
B) Protected from galvanic corrosion, if made of metal
C) Has a valve which allows drainage to the sump
D) Provides positive shut-off when tank is filled to no more than 95
percent of capacity.
Answer: B) Protected from galvanic corrosion, if made of metal
§ 2635(b)(1). Installation and Testing Requirements for All New
Underground Storage Tanks
(b) All underground storage tanks shall be equipped with a spill
container that collects any hazardous substances spilled during product
delivery operations to prevent the hazardous substance from entering the
UPDATED QUESTIONS AND ANSWERS
EXPERT VERIFIED GRADED A+
⩥ Who must demonstrate that a UST system is compatible with a
hazardous substance?
A. Independent testing organization
B. Tank manufacture
C. State registered professional engineer
D. Owner or operator.
Answer: D. Owner or operator
§ 2631(l). Design and Construction Requirements for New Underground
Storage Tanks
(l) On and after October 1, 2018, owners or operators shall demonstrate
compatibility, 30 days before beginning to store or changing the
hazardous substance, for all components used to construct the
underground storage tank system which may come into contact with the
hazardous substance to be stored and are not subject to subdivisions (b)
or (d) above, such as spill containers, overfill prevention equipment, and
ancillary equipment, by submitting to the local agency one of the
following:
(1) A written approval from an independent testing organization, cont.
,(2) A written approval from a state registered professional engineer for
use with the hazardous substance to be stored.
(3) A written affirmative statement of compatibility from the
manufacturer(s) of the components for use with the hazardous substance
to be stored.
⩥ What would an operator/owner not have in their monitoring and
response plan?
A. A description of the training necessary for the operation of both the
tank system and the monitoring equipment
B. The certifications of the person(s) responsible for performing the
monitoring and/or maintaining the equipment
C. The frequency of performing the monitoring
D. The methods and equipment to be used for performing the
monitoring..
Answer: B. The certifications of the person(s) responsible for
performing the monitoring and/or maintaining the equipment
§ 2634(d)(2). Monitoring and Response Plan Requirements for New
Underground Storage Tanks Containing Motor Vehicle Fuel and
Constructed Pursuant to Section 2633
(2) The owner or operator shall prepare a written procedure for routine
monitoring, submitted on the "Underground Storage Tank Monitoring
Plan" in Title 27, Division 3, Subdivision 1, Chapter 6, which
establishes:
(A) The frequency of performing the monitoring;
,(B) The methods and equipment to be used for performing the
monitoring;
(C) The location(s) where the monitoring will be performed;
(D) The name(s) and title(s) of the person(s) responsible for performing
the monitoring and/or maintaining the equipment;
(E) The reporting format;
(F) The preventive maintenance schedule for the monitoring equipment.
The maintenance schedule shall be in accordance with the
manufacturer's instructions; and
(G) A description of the training necessary for the operation of both the
tank system and the monitoring equipment.
⩥ What equipment are tested for tightness before being installed at a
UST facility?
A. UDC
B. Piping
C. Tanks
D. Flex connectors.
Answer: C. Tanks
2635(a)(3). Installation and Testing Requirements for All New
Underground Storage Tanks
(3) Before installation, the tank shall be tested for tightness at the
installation site in accordance with the manufacturer's written guidelines.
, If there are no guidelines, the primary and secondary containment shall
be tested for tightness with air pressure at not less than three pounds per
square inch (20.68 kilopascals) and not more than five pounds per
square inch (34.48 kilopascals). In lieu of the above, an equivalent
differential pressure test, expressed in inches of mercury vacuum, in the
interstitial space of the secondary containment, is acceptable. The
pressure (or vacuum in the interstitial space) shall be maintained for a
minimum of 30 minutes to determine if the tank is tight. If a tank fails
the tightness test, as evidenced by soap bubbles, or water droplets,
installation shall be suspended until the tank is replaced or repaired by a
factory authorized repair service. Following repair or replacement, the
tank shall pass a tightness test.
⩥ Which of the following is a requirement for spill containers?
A) Capacity of 19 gallons
B) Protected from galvanic corrosion, if made of metal
C) Has a valve which allows drainage to the sump
D) Provides positive shut-off when tank is filled to no more than 95
percent of capacity.
Answer: B) Protected from galvanic corrosion, if made of metal
§ 2635(b)(1). Installation and Testing Requirements for All New
Underground Storage Tanks
(b) All underground storage tanks shall be equipped with a spill
container that collects any hazardous substances spilled during product
delivery operations to prevent the hazardous substance from entering the
