ICC Decommissioning (U2) Exam Questions 2026/2027 | Actual Questions
and
Answers Latest Updated 2026/2027 (Graded A+)
owners/ operators must notify the state implementing agency ___ days prior to a permanent closure
Answer✔✔30 day notice and 24 hour verbal notice prior to breaking concrete
federal regulations do not require a notice on temporary closure but ______ Answer✔✔state
implementing agency's do require notice for temporary closure
when taking icc decommissioning exam there is no notice for a ust temporary closure. Answer✔✔
the following must be reported within 24 hours Answer✔✔A spill of petroleum that exceeds 25 gallons.
A spill of 25 gallons or less that is not contained or cleaned up within 24 hours
upon confirmation of a release during removal activities owners/ operators/ removal contractors must?
Answer✔✔within 20 days submit a report to the state implementing agency summarizing initial
abatement steps and results.
owners/ operators must keep tank closure letters for a minimum of? _______ Answer✔✔3 years
the flash point of diesel is? Answer✔✔126-205 F
the flash point for pure ethanol Answer✔✔61.88 F
Class IB flashpoint less then 73 F boiling point greater then 100 F. examples... Answer✔✔motor and
aviation, gasoline, toluene and lacquers
Class II flash point equal to or greater then 100 F but less then 140 F. examples Answer✔✔diesel fuel,
paint thinner
, what is the flashpoint for flammable liquids? Answer✔✔less then 100 degrees Fahrenheit
a flammable liquid does not exceed? Answer✔✔100 degrees Fahrenheit
a combustible liquid is Answer✔✔100 degrees Fahrenheit or more
what is the definition of flashpoint? Answer✔✔the temperature at which fuel gives off sufficient vapors
to ignite
flammable and combustible liquid themselves do not burn. it's the mixture of? Answer✔✔vapors and air
that burns if ignited
flammable liquids can give off enough vapors to form burnable mixtures with air. Example...
Answer✔✔Gasoline
combustible liquids .ust reach temperatures higher then 100 degrees Fahrenheit to release enough
vapors or fumes to ignite. Example... Answer✔✔Diesel
inerting a tank is? Answer✔✔Removing the oxygen.
purging a tank is? Answer✔✔removing the fuel.
when purging a tank a combustible gas meter (CGI) must be used to measure the presence of what?
Answer✔✔combustible gas or solvent vapor
LEL stands for? Answer✔✔Lower explosive limit
do not begin tank removal until? Answer✔✔the LEL reading is below 10%
and
Answers Latest Updated 2026/2027 (Graded A+)
owners/ operators must notify the state implementing agency ___ days prior to a permanent closure
Answer✔✔30 day notice and 24 hour verbal notice prior to breaking concrete
federal regulations do not require a notice on temporary closure but ______ Answer✔✔state
implementing agency's do require notice for temporary closure
when taking icc decommissioning exam there is no notice for a ust temporary closure. Answer✔✔
the following must be reported within 24 hours Answer✔✔A spill of petroleum that exceeds 25 gallons.
A spill of 25 gallons or less that is not contained or cleaned up within 24 hours
upon confirmation of a release during removal activities owners/ operators/ removal contractors must?
Answer✔✔within 20 days submit a report to the state implementing agency summarizing initial
abatement steps and results.
owners/ operators must keep tank closure letters for a minimum of? _______ Answer✔✔3 years
the flash point of diesel is? Answer✔✔126-205 F
the flash point for pure ethanol Answer✔✔61.88 F
Class IB flashpoint less then 73 F boiling point greater then 100 F. examples... Answer✔✔motor and
aviation, gasoline, toluene and lacquers
Class II flash point equal to or greater then 100 F but less then 140 F. examples Answer✔✔diesel fuel,
paint thinner
, what is the flashpoint for flammable liquids? Answer✔✔less then 100 degrees Fahrenheit
a flammable liquid does not exceed? Answer✔✔100 degrees Fahrenheit
a combustible liquid is Answer✔✔100 degrees Fahrenheit or more
what is the definition of flashpoint? Answer✔✔the temperature at which fuel gives off sufficient vapors
to ignite
flammable and combustible liquid themselves do not burn. it's the mixture of? Answer✔✔vapors and air
that burns if ignited
flammable liquids can give off enough vapors to form burnable mixtures with air. Example...
Answer✔✔Gasoline
combustible liquids .ust reach temperatures higher then 100 degrees Fahrenheit to release enough
vapors or fumes to ignite. Example... Answer✔✔Diesel
inerting a tank is? Answer✔✔Removing the oxygen.
purging a tank is? Answer✔✔removing the fuel.
when purging a tank a combustible gas meter (CGI) must be used to measure the presence of what?
Answer✔✔combustible gas or solvent vapor
LEL stands for? Answer✔✔Lower explosive limit
do not begin tank removal until? Answer✔✔the LEL reading is below 10%
