CALIFORNIA UST SYSTEM OPERATOR EXAM 70
QUESTIONS & CORRECT ANSWERS LATEST 2025
By definition an "Underground Storage Tank" includes:
a. only the tank
b. the tank and all connected piping
c. the tank, all connected piping and dispensers
d. only tanks totally beneath the surface of the ground
b. the tank and all connected piping
Which of the following is considered an Underground Storage Tank?
a. septic tank
b. 500 gallon farm tank
c. 2000 gallon petroleum storage tank
d. 500 gallon residential heating oil tank
c. 2000 gallon petroleum storage tank
The UST Owner or operator must demonstrate financial responsibility for:
a. tanks holding heating oil used on the premises of a residence
b. residential tanks > 1,100 gallons
c. septic tanks
d. tanks < 110 gallons holding a minimum concentration of petroleum
b. residential tanks > 1,100 gallons
Which of the following UST systems meet the requirement for secondary
containment:
a. laminated tanks
b. clad tanks
c. coated tanks
d. double-walled tanks
d. double-walled tanks
,The following is true of spill buckets except:
a. must provide drainage for spilled product into secondary containment sump
b. must be tested annually
c. designed to catch product spilled during disconnection of delivery hose
d. for temporary storage only
a. must provide drainage for spilled product into secondary containment sump
The following are approved overfill protection systems except:
a. automatic shutoff devices
b. overfill alarms
c. spill buckets
d. ball flat valves
c. spill buckets
If equipped with an overfill alarm, it must be located ____:
a. so that it can be seen and/or heard from the delivery location
b. within 100 feet of the delivery location
c. within 50 feet of the delivery location
d. both a. and c.
a. so that it can be seen and/or heard from the delivery location
According to title 23; The following piping components, if installed after July 1,
1987 but prior to July 1, 2003, must have secondary containment:
a. vent or tank riser piping
b. vapor recovery piping not designed for liquid product
c. safe suction piping
d. pressurized product piping
d. pressurized product piping
The following is true of impressed current cathodic protection systems:
a. impressed current rectifier may be de-powered when tank is empty
b. impressed current rectifier may be de-powered during a temporary tank
closure
c. impressed current rectifier may be de-powered when the facility is closed for
, business
d. none of the above
d. none of the above
The local agency may waive the requirement for overfill protection if the UST is
filled by transfer of less than:
a. 25 gallons
b. 500 gallons
c. 1000 gallons
d. 110 gallons
a. 25 gallons
According to the Health and Safety Code; The following component(s) are
considered "pipe" on tanks installed on and after July 1, 2003:
a. pressurized product piping
b. below ground vapor recovery lines
c. above ground vapor recovery lines
d. both a. and b.
d. both a. and b.
If installed/utilized, the following require(s) independent third party certification
to prove compliance with established regulations:
a. automatic tank gauging system
b. liquid product detectors
c. statistical inventory reconciliation methods
d. all of the above
d. all of the above
According to the health and safety code; tanks installed on and after July 1, 2003
require a one-time test at installation to determine that the tank is product tight.
Acceptable test methods are:
a. enhanced leak detection
b. inert gas pressure test
c. an equivalent test approved the board
d. all of the above
QUESTIONS & CORRECT ANSWERS LATEST 2025
By definition an "Underground Storage Tank" includes:
a. only the tank
b. the tank and all connected piping
c. the tank, all connected piping and dispensers
d. only tanks totally beneath the surface of the ground
b. the tank and all connected piping
Which of the following is considered an Underground Storage Tank?
a. septic tank
b. 500 gallon farm tank
c. 2000 gallon petroleum storage tank
d. 500 gallon residential heating oil tank
c. 2000 gallon petroleum storage tank
The UST Owner or operator must demonstrate financial responsibility for:
a. tanks holding heating oil used on the premises of a residence
b. residential tanks > 1,100 gallons
c. septic tanks
d. tanks < 110 gallons holding a minimum concentration of petroleum
b. residential tanks > 1,100 gallons
Which of the following UST systems meet the requirement for secondary
containment:
a. laminated tanks
b. clad tanks
c. coated tanks
d. double-walled tanks
d. double-walled tanks
,The following is true of spill buckets except:
a. must provide drainage for spilled product into secondary containment sump
b. must be tested annually
c. designed to catch product spilled during disconnection of delivery hose
d. for temporary storage only
a. must provide drainage for spilled product into secondary containment sump
The following are approved overfill protection systems except:
a. automatic shutoff devices
b. overfill alarms
c. spill buckets
d. ball flat valves
c. spill buckets
If equipped with an overfill alarm, it must be located ____:
a. so that it can be seen and/or heard from the delivery location
b. within 100 feet of the delivery location
c. within 50 feet of the delivery location
d. both a. and c.
a. so that it can be seen and/or heard from the delivery location
According to title 23; The following piping components, if installed after July 1,
1987 but prior to July 1, 2003, must have secondary containment:
a. vent or tank riser piping
b. vapor recovery piping not designed for liquid product
c. safe suction piping
d. pressurized product piping
d. pressurized product piping
The following is true of impressed current cathodic protection systems:
a. impressed current rectifier may be de-powered when tank is empty
b. impressed current rectifier may be de-powered during a temporary tank
closure
c. impressed current rectifier may be de-powered when the facility is closed for
, business
d. none of the above
d. none of the above
The local agency may waive the requirement for overfill protection if the UST is
filled by transfer of less than:
a. 25 gallons
b. 500 gallons
c. 1000 gallons
d. 110 gallons
a. 25 gallons
According to the Health and Safety Code; The following component(s) are
considered "pipe" on tanks installed on and after July 1, 2003:
a. pressurized product piping
b. below ground vapor recovery lines
c. above ground vapor recovery lines
d. both a. and b.
d. both a. and b.
If installed/utilized, the following require(s) independent third party certification
to prove compliance with established regulations:
a. automatic tank gauging system
b. liquid product detectors
c. statistical inventory reconciliation methods
d. all of the above
d. all of the above
According to the health and safety code; tanks installed on and after July 1, 2003
require a one-time test at installation to determine that the tank is product tight.
Acceptable test methods are:
a. enhanced leak detection
b. inert gas pressure test
c. an equivalent test approved the board
d. all of the above
