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ICC DECOMMISSIONING (U2) 2025 ;
Brand New Actual Exam With Correct
Answers
owners/ operators must notify the state implementing agency ___ days
prior to a permanent closure - Correct-Answer-30 day notice and 24
hour verbal notice prior to breaking concrete
LEL stands for? - Correct-Answer-Lower explosive limit
do not begin tank removal until? - Correct-Answer-the LEL reading is
below 10%
when using an educator air mover it must be grounded to an approved
grounding rod and bonded to the tank being purged. The drop tube
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must remain In place to pick up vapors from the bottom of the tank. -
Correct-Answer-
when discharging vapors from a tank you must be? - Correct-Answer-
12' above grade
3' above adjacent roof lines.
5' above the highest projection of canopy (if vent line is attached to
canopy)
15' from any power or ventilation system.
when Inerting a tank what should be used? - Correct-Answer-Oxygen
indicator.
when inheriting oxygen levels should be less then? - Correct-Answer-5%
or less should be obtained before closure begins
when using dry ice to inert a tank you should never? - Correct-Answer-
put dry ice in drop tube.
ICC DECOMMISSIONING (U2) 2025 ;
Brand New Actual Exam With Correct
Answers
owners/ operators must notify the state implementing agency ___ days
prior to a permanent closure - Correct-Answer-30 day notice and 24
hour verbal notice prior to breaking concrete
LEL stands for? - Correct-Answer-Lower explosive limit
do not begin tank removal until? - Correct-Answer-the LEL reading is
below 10%
when using an educator air mover it must be grounded to an approved
grounding rod and bonded to the tank being purged. The drop tube
, 2|Page
must remain In place to pick up vapors from the bottom of the tank. -
Correct-Answer-
when discharging vapors from a tank you must be? - Correct-Answer-
12' above grade
3' above adjacent roof lines.
5' above the highest projection of canopy (if vent line is attached to
canopy)
15' from any power or ventilation system.
when Inerting a tank what should be used? - Correct-Answer-Oxygen
indicator.
when inheriting oxygen levels should be less then? - Correct-Answer-5%
or less should be obtained before closure begins
when using dry ice to inert a tank you should never? - Correct-Answer-
put dry ice in drop tube.
