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U3 ICC TANK TIGHTNESS TESTING
2025/2026 QUESTIONS &
ANSWERS (A+ GRADED 100%
VERIFIED)
"At what size spill does it need to be reported? a. 5 gallons b. 10 gallons c. 15 gallons
d. 25 gallons - CORRECT ANSWER=> d. 25 gallons"
"Contamination of soils is encountered before removing a tank. The clean up must be initiated by the: a. Fire Marshal b. Ecology inspector c. Owner / operator of the UST system
d. Landlord - CORRECT ANSWER=> c. Owner / operator of the UST system"
"All are examples of overfill protection, except: a. Vent restricting device b. Drop tube with an automatic shut off device c. Audible and visual alarm
d. Expandable bladder in manway - CORRECT ANSWER=> d. Expandable bladder in manway"
"Definition: An observation well is located: a. Outside the tank excavation, but within 25 feet b. Inside the tank excavation, extending 1' below the bottom of the tanks c. Inside the tank excavation, no deeper than 15 feet
d. Outside the tank excavation until ground water is reached - CORRECT ANSWER=> b. Inside the tank
excavation, extending 1' below the bottom of the tanks" "A monitoring well lid is marked with a: a. Black lid with a white equilateral triangle
b. White lid with a black equilateral triangle - CORRECT ANSWER=> b. White lid with a black equilateral
triangle" "What is the main purpose of clearly marking and securing monitoring well caps?
a. To prevent people from removing water b. ensure only geologist access the water c. Prevent delivery drivers from mistakenly dumping fuel in the well
d. Prevent ice build-up - CORRECT ANSWER=> c. Prevent delivery drivers from mistakenly dumping fuel
in the well" "All of the following are considered part of the secondary containment system EXCEPT: a. Under dispenser containment b. Monitoring well c. Containment sensor
d. Double wall piping - CORRECT ANSWER=> b. Monitoring well"
"Recommended interstitial monitoring includes the following: a. Soil vapor monitoring b. Impervious liner with a well to measure any release c. Groundwater monitoring
d. Sensors installed in containment sumps - CORRECT ANSWER=> d. Sensors installed in containment
sumps" "A vapor collection tank (vapor pot) is located between the underground tanks and dispensers. It is designed to: a. collect and condense vapors so they can be measured and reported to the local air authority. b. allow collection of condensed vapors at a low point and a means to remove them. c. remove condensed vapors from the UST system to be disposed of when the tank reaches no more
than 95% full. - CORRECT ANSWER=> b. allow collection of condensed vapors at a low point and a
means to remove them." "When cool fuel is added to a tank with warmer fuel, the following is true: a. The fuel temperature will raise and the product will expand. b. The fuel temperature will lower and the product will contract
c. The fuel temperature will lower and the product will expand. - CORRECT ANSWER=> b. The fuel
temperature will lower and the product will contract" "All factors would cause inaccurate data collection during an overfill test on manifolded tanks, EXCEPT? a. different tank types; (steel / fiberglass) b. associated vapor pockets c. difference in temperature
d. difference in diameters of tanks - CORRECT ANSWER=> d. difference in diameters of tanks"
"When manifolding tanks all are important, EXCEPT? a. same size of tanks (gallons) b. same diameter of tanks
c. same burial depth - CORRECT ANSWER=> a. same size of tanks (gallons)"
c. Explosions are minimal - CORRECT ANSWER=> c. Explosions are minimal"
"A tank is dented several inches during installation, but is still installed. The best way to test it in the future is: a. Cannot be tested, shouldn't be installed b. Overfill volumetric c. Underfill volumetric
d. Non volumetric - CORRECT ANSWER=> d. Non volumetric"
"When conducting a non-volumetric test all openings to the tank should be capped to: a. Minimize the affects of high water b. Minimize the affects of evaporation
c. Minimize the affects of wind - CORRECT ANSWER=> c. Minimize the affects of wind"
"Non volumetric test data is collected in terms of: a. Quantitive analysis b. Qualitive analysis
c. Derivitive analysis - CORRECT ANSWER=> b. Qualitive analysis"
"Which method would allow a service station to continue to operate without affecting the test data collection? a. Underfill volumetric b. Overfill volumetric c. Tracer chemical
d. Acoustical non volumetric - CORRECT ANSWER=> c. Tracer chemical"
"None of the non volumetric leak detection methods is product level sensitive, therefore the following variables cannot affect the results except: a. Tank geometry b. Vapor pockets c. Tank inclination
d. Wind - CORRECT ANSWER=> d. Wind"
"Which of the following is not a limitation of non volumetric testing? a. Usually cannot measure a leak rate accurately or at all b. Adversely affect product quality if compound to used to test tank is not inert c. Cause or enhance a leak during testing by exerting pressure higher than normal
d. Product evaporation - CORRECT ANSWER=> d. Product evaporation"
"With an acoustical non-volumetric test, all the following are true except: a. Does not provide a leak rate b. Potential increase in leak during the test period c. If the nitrogen pressure exceeds the tank's normal operating pressure there is a risk of rupture
d. The measured leak rate can be masked by a high water table. - CORRECT ANSWER=> d. The
measured leak rate can be masked by a high water table." "When a tracer chemical, such as helium, is used to pressurize an empty tank which test variable is most likely to mask a leak? a. Water table b. Vapor pocket c. Atmospheric pressure changes
d. Temperature change - CORRECT ANSWER=> a. Water table"
"A tank shipped with an interstice on which a vacuum is drawn: a. Must still have a soap water test of the entire exterior surface to check for potential leaks before it is installed b. Need not be subjected to the pre installation air/soap test provided the tank arrives within limits designed by the manufacturer c. Must be hydrostatically tested before installation d. Must have the vacuum increased to 15 Hg of vacuum for a period no less than 1 hour and not decay
beyond manufacturers allowable pressure loss. - CORRECT ANSWER=> b. Need not be subjected to the
pre installation air/soap test provided the tank arrives within limits designed by the manufacturer" "Prior to installing a 8' diameter double wall tank, the inner tank must be pressurized to a maximum of _____ psig for a period of ____ hour(s). a. 3, 1 b, 3, 24 c. 5, 1
d. 5, 24 - CORRECT ANSWER=> c. 5, 1"
"The proper procedure for pressurizing a double walled tank includes: a. Pressurizing the interstice before pressurizing the primary tank to conduct a soap water test first. b. Pressurizing the primary tank and the interstice immediately afterwards c. Pressurizing the primary tank and the interstice following the recommended test duration d. Pressurizing the primary tank and interstice simultaneously to avoid causing damage to either tank
wall. - CORRECT ANSWER=> c. Pressurizing the primary tank and the interstice following the
recommended test duration" "The P.E.L. for benzene exposure is ___ ppm in an 8hour period or ___ ppm in 15 minutes max. -
CORRECT ANSWER=> 1 & 5"
"At what exposure level does benzene cause molecular change to the blood? - CORRECT ANSWER=> d.
25 ppm"
"An eductor is used to vapor free a tank. How tall does the exhaust need to be? - CORRECT ANSWER=>
12 feet"
"If a check valve is located at the dispenser on a suction system, how much pressure must be applied for a tightness test? a. 150% of normal operating pressure b. 5 psi through the air eliminator port
c. It cannot be tested - CORRECT ANSWER=> c. It cannot be tested"
"In a American style suction system, what are the release detection requirements? a. Monthly monitoring & line test annually b. Monthly monitoring & line test every 3 years
c. No line test, only monthly monitoring - CORRECT ANSWER=> b. Monthly monitoring & line test
every 3 years" "According to EPA guidelines, the acceptable leak threshold for a product line test is: a. .01 gph b. .1 gph c. .2 gph
d. 3 gph - CORRECT ANSWER=> b. .1 gph"
"How often must pressurized piping be tested along with monthly monitoring? a. 60 days b. 1 year
c. 3 years - CORRECT ANSWER=> b. 1 year"
"Immediately before underground piping is placed into service a hydrostatic test should be completed at ______ percent of the operating pressure but no less than ____ psig. a. 100, 50 b. 50, 150 c. 150, 50
d. 150, 15 - CORRECT ANSWER=> c. 150, 50"
"An automatic line leak detector is defined as a device that: a. Is designed to shut down or dramatically reduce the flow to 3 gallons per hour in a pressurized piping system b. Is designed to detect a leak of 3 gallons per hour at a line pressure of no more than 15 pounds per square inch c. Is designed to detect a leak of 3 gallons per hour at a line pressure of 10 pounds per square inch d. Is designed to detect a leak of 3 gallons per hour at a line pressure of 10 pounds per square inch in
American style suction systems - CORRECT ANSWER=> c. Is designed to detect a leak of 3 gallons per
hour at a line pressure of 10 pounds per square inch" “On a steel tank without cathodic protection, if a coating is flawed, what happens at the flaw? a. Cathodic surface is increased b. Current flow is increased from this area
c. Current flow is increased to this area - CORRECT ANSWER=> b. Current flow is increased from this
area" "On an impressed current cathodic protection system, the negative wire of the rectifier is connected to the: a. Anode b. Cathode c. Drop tube
d. Dielectric union - CORRECT ANSWER=> b. Cathode"
"All are examples of acceptable release detection for tanks, except: a. Impressed current cathodic protection b. Automatic tank gauging c. Statistical inventory reconciliation
d. Soil-vapor monitoring - CORRECT ANSWER=> a. Impressed current cathodic protection"
"When a tank is temporarily closed, the cathodic protection system: a. Must be turned off b. Must remain in operation c. Should be removed
d. Operator can have it on or off. - CORRECT ANSWER=> b. Must remain in operation"
"When a steel tank is installed with a galvanic CP system attached, the tank gauges are usually connected through a riser with a dielectric bushing. What is the purpose of that? a. To prevent static discharge b. To minimize effects of noise c. To electrically isolate the tank from the tank gauge
d. To prevent water intrusion in the tank - CORRECT ANSWER=> c. To electrically isolate the tank from
the tank gauge" "Factory-installed diectric coatings may include all of the following except: a. Asphalt b. epoxies c. Enamels
d. fiberglass-reinforced plastic - CORRECT ANSWER=> a. Asphalt"
"According to the EPA, Tank tightness test data must be maintained for: a. 18 months b. 3 years c. 5 years
d. Until the next test is performed - CORRECT ANSWER=> d. Until the next test is performed"
"How long must records of UST system repairs be available on site? a. 60 days
