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A comprehensive set of multiple choice questions and answers related to underground storage tank (ust) tightness testing. It covers various aspects of ust systems, including secondary containment, vapor collection, overfill testing, volumetric and non-volumetric testing methods, leak detection, and safety procedures. Designed to help students and professionals in the environmental and petroleum industries understand the principles and practices of ust tightness testing.
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"All of the following are considered part of the secondary containment system EXCEPT: a. Under dispenser containment b. Monitoring well c. Containment sensor
"Recommended interstitial monitoring includes the following: a. Soil vapor monitoring b. Impervious liner with a well to measure any release c. Groundwater monitoring
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
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
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
"When manifolding tanks all are important, EXCEPT? a. same size of tanks (gallons) b. same diameter of tanks
"What is the inherent error for calculating coefficient of expansion / contraction? a. 1-4% b. 5-9%
"All factors affect a volumetric tank test except: a. Height and temperature of groundwater b. Waiting periods after deliveries c. Tank geometry
"According to the EPA, the drop tube should extend to within ___ inches of the bottom of the tank. -
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
"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
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
"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
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
"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
recommended test duration"
"The P.E.L. for benzene exposure is ___ ppm in an 8hour period or ___ ppm in 15 minutes max. -
25 ppm"
12 feet"
tank" "Flammable liquids (class 1) are defined as having: a. A flash point of less than 100 degrees Celsius b. A flash point of 100 degrees Fahrenheit or more
100 degrees Fahrenheit" "Gasoline vapors are: a. Lighter than air
"Gasoline vapors are defined as having: a. Low vapor pressure and high flash point b. High vapor pressure and high flash point c. High vapor pressure and low flash point
point" "All of the following are included in the fire triangle, except: a. Ignition source b. Fuel c. Inert gas
"The European suction system has air in it. What do you check first? a. The pump b. The check valve c. The tank
"In a European style suction system, what are the release detection requirements? a. Monthly monitoring & line test annually
"Observation period of Vacuum level 10 Inches Hg if capacity is greater than 20,000. a. 2 hours b. 1 hour c. 10 minutes
"Observation period of Vacuum level 10 Inches Hg if capacity is less than 20,000. a. 2 hours b. 1 hour c. 10 minutes
"Tightness Testing should be capable of detecting a leak of as little as ______________ With a probability of detection of 0.95 and a probability of false alarm of ________. a. 760 mL/hr (0.20 gal/hr)/. b. 380 mL/hr (0.10 gal/hr), 0. c. 380 mL/hr (0.10 gal/hr), 0.
"Area between primary and secondary containment of a double-walled tank. a. Interstitial Space b. Innerspace
water table."
integrity of the liquid-filled secondary containment." "Federal UST Rules require overfill prevention alarm to automatically alert the transfer operator when the tank is no more than _____ percent full. a. 90% b. 95% c. 75%
"Overfill Prevention Devices Commonly Used: a.Alarms b. Flow Shutoff Devices c. Vent restriction Devices.
Double-walled piping Tank-top sumps Under-dispenser sumps Sensing devices"
Groundwater monitoring Inventory control combined with periodic tightness testing Manual tank testing Interstitial monitoring Soil-vapor monitoring Statistical inventory reconciliation" "Clearly mark wells with a _______ equilateral triangle on a _____ background and a durable label, Warning against the accidental or intentional introduction of petroleum products into the well. a. black, white b. white, black c. red, white
piping systems only) Groundwater monitoring Periodic piping tightness testing Interstitial monitoring Soil-vapor monitoring Statistical inventory reconciliation Under-pump check valve (suction systems only)" "An automatic line-leak detector is a device that can detect a leak of ______ gallons per hour at a line pressure of __________ pounds per square inch within a period of one hour. a. 3, 10 b. 5, 10
systems" "Cut suction stubs to allow at least ________ inches clearance from the tank bottom. a. 1 to 2 b. 3 to 5 c. 4 to 6
Vibration Noise Equipment accuracy Operator error Type of product Power variation Instrumentation limitation Atmospheric pressure Tank inclination"
based on volume changes"
qualitative analysis" "Factors affecting accuracy or Leak Detection Methods a. water level b. power variations c.atmospheric pressure
"Water Intrusion may indicate of a leak, especially in high groundwater situations. a. True
"Interstitial space volume, temperature, water table, and product level in the primary tank affect Secondary Containment Integrity Testing. a. True
interstitial space of the tank and the level is brought up into the interstitial riser The liquid level is monitored for a specified period of time If the liquid level is maintained, then the containment system has passed the test" "Federal UST Rules require overfill prevention Devices must be set to shut off flow when the tank is no more than _____ percent full a. 90% b. 95% c. 75%
"When installing a foot valve or angle-check valve to hold prime in the suction line, use an ______________ at the tank/suction line connection to facilitate future testing a. angled fitting b. suction fitting
atmospheric pressure, below-grade piping sloped to drain back into the storage tank if suction is released, and the only check valve located directly below and as close as practical to the suction pump" "If the results of a test indicate the probability of a leak, either corrective action or additional testing to confirm the leak should be performed. a. True
"Any liquid with a flashpoint greater than 100 degrees Fahrenheit is considered ____________. a. Combustible b. Retardant
"The availability of _______________, not the ignition temperature, is the key indicator of a hazard. a. Vapor b. Fuel
"Death will occur with oxygen concentration less than ____________ a. 6% b. 21%
"The rate of temperature change in the first day or two after addition of liquid is ________ degrees
"A change of __________ degrees Fahrenheit per hour in a 10,000 gallon tank may cause a 0.068 gallon
"Water may enhance _________
"Tanks must be monitored every ___________ days a. 180 b. 30 c. 60
making that surface the cathode of an electrochemical cell." "UST systems that meet the performance standards in § 280.20 or § 280.21, and the monthly inventory control requirements in § 280.43 (a) or (b), may use tank tightness testing (conducted in accordance with § 280.43 (c)) at least every _________ until December 22, 1998, or until _____________ after the tank is installed or upgraded under § 280.21 (b), whichever is later; a. 5 years, 10 years b. 15 years, 20 years
"__________ must Be equipped with an automatic line leak detector conducted in accordance with § 280.44 (a); and Have an annual line tightness test conducted in accordance with § 280.44 (b) or have monthly monitoring conducted in accordance with § 280.44 (c) a. Pressurized piping b. Suction piping c. Slanted piping
"Underground piping that conveys regulated substances under suction. a. Pressurized piping b. Suction piping c. Slanted piping
"Suction piping Must either have a line tightness test conducted at least every __________ and in accordance with § 280.44 (b), or use a ________ monitoring method conducted in accordance with § 280.44 (c). a. 3 years, monthly b. year, annual
"No release detection is required for suction piping that is designed and constructed to meet the
pressure; The below-grade piping is sloped so that the contents of the pipe will drain back into the
storage tank if the suction is released; Only one check valve is included in each suction line; The check valve is located directly below and as close as practical to the suction pump." "___________ test of piping may be conducted only if it can detect a 0.1 gallon per hour leak rate at one and one-half times the operating pressure. a. Line Tightness b. ATG c. PLLD
"Written documentation of all calibration, maintenance, and repair of release detection equipment permanently located on-site must be maintained for at least _________________ after the servicing work is completed, or for another reasonable time period determined by the implementing agency. a. Until next test b. 1 year c. Life of tanks
"Any schedules of required calibration and maintenance provided by the release detection equipment manufacturer must be retained for _______________ from the date of installation a. Until next test b. 1 year c. Life of tanks
"Upon confirmation of a release in accordance with § 280.52 or after a release from the UST system is identified in any other manner, owners and operators must perform the following initial response actions within 24 hours of a release or within another reasonable period of time determined by the implementing agency except: a. Report the release to the implementing agency (e.g., by telephone or electronic mail); b. Take immediate action to prevent any further release of the regulated substance into the environment; c. Identify and mitigate fire, explosion, and vapor hazards.
Reconciliation Report"
measures liquid level and a console that calculates the liquid volume in the UST."
opening in a UST, limiting the flow of fuel into the tank."
containing leaks and spills from piping, dispensers, pumps and related components."
"In a coaxial dispenser hose, the _________ flows through the inner hose and the ______ flow through
"To pass a secondary containment integrity test on underground product piping the pressure change in the piping must___ a. not drop below 3 psig b. not drop more than 1 psig c. maintain 5 psig for 5 minutes
"For ball floats to operate properly _____ a. the ball must move freely in the droptube b. all tank-top fittings must be leak free and vapor tight c. the product level must be kept below 90% tank capacity
all tank-top fittings must be leak free and vapor tight" "If an automatic vacuum shutoff valve is used in the line between the vacuum source and fitting on the plumbers plug when performing the dry test method for secondary containment integrity, it should be located____ a. anywhere in the line that is convenient b. on the outlet of the vacuum generating source c. at the inlet of the vacuum producing device
vacuum producing device" "If before starting the ATG functionality test the console shows an active or recurring history of leak detection related warnings ______ a. notify appropriate person before continuing test b. contact equipment manufacturer before continuing c. cancel all the warnings on the console and proceed with test procedure
notify appropriate person before continuing test" "Which condition does not effect the liquid filled test method for testing secondary containment integrity? a. Water table height b. Product level height c. Atmospheric Pressure
"When performing the liquid filled test method for testing tank secondary containment integrity on double wall steel tanks ______ a. use a brine solution to top off the interstitial space
b. the volume of the interstitial will effect the accuracy of the test c. us the same fluid during the test as the monitoring fluid
"Before performing the liquid filled test method for tank secondary containment integrity ______ a. the primary tank must be emptied b. any bulk deliveries in progress must be completed before starting the test c. no bulk deliveries to the primary tank may occur less than 24 hours before the test d. no bulk deliveries to the primary tank may occur during the test or less than 8 hours before the test. -
hours before the test." "The vacuum generating device for the dry test method for secondary containment integrity ____ a. must be powered by compressed air b. must meet class 1, division 2 safety standards c. must be able to pull 10 inches of mercury vacuum d. Must meet class 1, division 1 safety standards and be capable of pulling 15 inches mercury vacuum -
inches mercury vacuum" "To perform a secondary containment integrity test on underground piping ____. a. all dispensing activities must be stopped b. the primary pipe must be drained of product c. the primary product tank and any piping must be drained
"When performing a dry test method for secondary containment integrity, the automatic vacuum shutoff valve should be set at ____ a. the test vacuum level b. a max of 20 percent above est vacuum c. a minimum of 20 percent an no more than 4 inches Hg above test vacuum
"When performing a dry test method for secondary containment integrity, after connecting the line from the vacuum generating device to the plumber's plug and reaching the specified vacuum level ___ a. proceed with the test immediately b. allow the vacuum to stabilize for a minimum of 1 minute before proceeding with the test c. release the vacuum, pull the vacuum again to specified level and then proceed with the test
compensate for any sump deflection that may occur" "Tank liquid level measurements are taken at the beginning and ending of a period of atleast ___________________ during which no liquid is added to or removed from the tank. a. 36 hours b. 12 hours
"Only tanks 550 gallons or less may use _______ as sole method of release detection. Tanks 551- may use this in place of _________. Tanks 2000 gallons or greater ______ use this method to meet requirements of subpart 280.43 (a). a. Manual Tank gauging, manual inventory control, may not
manual inventory control, may not" "Main exposure route for Gasoline is a. eyes b. skin c. respiratory tract
"The vapor space of UST storing materials such as JP-4 and Jet B (and other liquids of similar vapor pressure between 2 and 4 psi) presents a hazard because the vapors are _____ a. normally in the flammable range b. Higher than the flammable range
"Kerosene grade aviation fuel is relatively _______ but the wide cut blends represent a significantly _______ fire hazard a. non- flammable, higher b. flammable, higher c. flammable, lower
"A 4 inch fill pipe with a volume change of 0.05 gallons will cause a level change of about _______ a. 4 inches b. 1 inch c. .05 inch
"Drop tubes interfere with product circulation for those tightness test methods that try to achieve even temperature distribution using a circulating pump. Whenever possible they should ____ a. be replaced prior to testing
b. be removed prior to testing c. make no difference
"The best results are obtained with water level _____the level of the tank. a. above b. equal to c. below
"The height to volume factor should be determined ________ a. by the regulating agency for standard tank dimensions b. specifically for each site because the geometry of each UST system is slightly different
geometry of each UST system is slightly different" "For manual tightness test methods, a sampling frequency on the order of ____ minutes is generally adequate. a. 6 b. 10 c. 15
"Generally conduits should have an internal diameter of _____ a. 2 inches b. 1 inch
"Any time product is delivered to an UST, atleast _____ should elapse between delivery and testing. a. 6 hours b.5 hours c. 24 hours
"For approximately every _____ degree Fahrenheit increase in temperature, Gasoline volatilization rate increases by about ____ a. 1, double b. 20, 1/ c. 25, double
"How often should stage 2 Vapor recovery be tested? a. Daily b. Weekly.