ICC U1 Underground Storage Tank
Installer EXAM STUDY GUIDE 2026/2027
ACCURATE QUESTIONS WITH CORRECT
DETAILED SOLUTIONS ||
100% GUARANTEED PASS
<NEWEST VERSION>
1. when a bottom hold down pad is used under a steel tank. - ANSWER
✔ the bedding material may be reduced to 6"
2. cover in areas that are subject to vehicle traffic - ANSWER ✔ 30"
compacted backfill and 6" of asphaltic concrete, or 18" of compacted
backfill and 6 to 8" of reinforced concrete. paving over tanks in traffic
areas should extend 1 foot beyond tank perimeter.
3. cover in non traffic areas should be atleast 2' thick and consist of a
minimum of 1' of backfill covered by filter fabric and a minimum of 1'
earth. - ANSWER ✔ an acceptable alternative is 1' backfill material
and atleast 4" of reinforced concrete or 6" of asphalt paving.
4. the maximum burial depth for fiberglass tanks - ANSWER ✔ 7'
5. the burial depth for steel tanks is? - ANSWER ✔ 5'
6. to provide a firm foundation set tanks on atleast....... of backfill -
ANSWER ✔ 1' thick that extends 1' beyond ends and sides of tank.
7. how many feet of backfill is required between adjacent tanks and tanks
and excavation wals? - ANSWER ✔ 2'
8. excavation material must be stockpiled atleased..... from tank -
ANSWER ✔ 2'
,9. what's the allowed size for pea gravel backfill - ANSWER ✔ 3/4"
10.what's the allowed crushed rock backfill size? - ANSWER ✔ 1/2"
11.install tank gauge probe as close as possible to the? - ANSWER ✔
middle of the tank. avoide atg probe adjacent to the fill pipe or
submersible pump.
12.observation wells locates I the tank excavation and monitoring wells
installed in native soil outside the tank excavation. may be used for leak
detection only if? - ANSWER ✔ the water table is within 20' of the
ground surface all times of the year.
13.construct wells of factory slotted PVC or coated metallic pipe with
0.020-inch openings and allow water or released product to flow freely
into the well. - ANSWER ✔ observation well must be 1 t0 2' below
the bottom of the tank. monitoring well must be 5' below water table to
a maximum of 5'.
14.provide atleast 6" of clearance between piping and electrical conduits.
seperate the piping by atleast twice the size of the piping diameter.
provide atleast 6" between piping g and the excavation walls. -
ANSWER ✔
15.schedule 40 factory wrapped coated steel pipe is the minimum standard
for metallic product piping. - ANSWER ✔ if u ions are installed under
ground they should be 250/300 ground joint onions and provide access
to service.
16.install fill pipe so the top of fill ca pl will be? - ANSWER ✔ 4 to 6"
below the manhole lid.
17.air test new single wall or double wall piping at? - ANSWER ✔ 50
psig
18.It test primary coaxle piping at? - ANSWER ✔ 50 psig for 1 hour.
, 19.for fiberglass secondary piping initial testing, test at? - ANSWER ✔
10 psig, if flexible connectors are used test at 5 psig.
20.dialetric coatings isolate the external surfaces of thank and piping from
the environment and reduce current demand on the catholic protection.
coatings may be? - ANSWER ✔ coal tar foxes, enamels, fiberglass
reinforced plastic or urethane in liquid form, tape or extrusions.
21.One of the significant causes of leaks in underground liquid storage
systems is ____________ ________________ - ANSWER ✔
Improper Installation
22.Written Plans are required to - ANSWER ✔ obtain permits, solicit
bids, and provide precise guidance for installers.
23.The plans should - ANSWER ✔ Describe the property, identify the
size and location of the tanks, indicate the liquids to be stored and
provide the location of the dispensers and piping.
24.Storage systems discussed in this recommended practice are usually
regulated by - ANSWER ✔ Federal, state or local agencies.
25.All owners should ensure that the equipment to be installed meets -
ANSWER ✔ applicable regulatory requirements before being
installed
26.Consult the local authorities who have jurisdiction in the area before
storage-system plans are - ANSWER ✔ finalized or construction is
initiated.
27.A person conducting UST monitoring equipment certification shall
affix tag/sticker on each component and shall include ___ and ___. -
ANSWER ✔ Date certified, replaced or repaired
Contractor/tank tester's license number
28.LLD shall detect release of __ gph and ___ PSI within ___ hour -
ANSWER ✔ 3 gph
10 PSI
, 29.Suction piping shall be tested every ___ years - ANSWER ✔ 3 years
30.Owners/ops of UST shall submit copy of ELD results to local agency
within ___ days of completion of test - ANSWER ✔ 60 days
31.Within ____ hours of unauthorized release, owner/operator should
notify ______. - ANSWER ✔ 24 hours
32.local agency
33.Date that all UDC upgrades shall be completed - ANSWER ✔
December 31, 2003
34.Tanks and piping which have been repaired shall be tested for tightness
within ___ days of completion of repair - ANSWER ✔ 30 days
35.UST shall be inspected every ____ months to verify that temporary
closure measures are still in place - ANSWER ✔ 3 months
36.If UST is removed, soil samples shall be taken.. - ANSWER ✔
beneath removed portions at a minimum of 2 feet at each end of the
tank
37.Within ______ of affixing red tag, local agency shall notify own of
significant violation - ANSWER ✔ 24 hours
38.Location of red tag - ANSWER ✔ Fill pipe
39.Secondary containment system shall contain what amount of a tank if
only one tank is located in containment?
50
100
150
200 - ANSWER ✔ (b)
HSC 25291(a){3), CCR 2631(d)(1)
40.Temporary closure is appropriate for which of the following:
the tank system is empty and will be removed from service indefinitely
Installer EXAM STUDY GUIDE 2026/2027
ACCURATE QUESTIONS WITH CORRECT
DETAILED SOLUTIONS ||
100% GUARANTEED PASS
<NEWEST VERSION>
1. when a bottom hold down pad is used under a steel tank. - ANSWER
✔ the bedding material may be reduced to 6"
2. cover in areas that are subject to vehicle traffic - ANSWER ✔ 30"
compacted backfill and 6" of asphaltic concrete, or 18" of compacted
backfill and 6 to 8" of reinforced concrete. paving over tanks in traffic
areas should extend 1 foot beyond tank perimeter.
3. cover in non traffic areas should be atleast 2' thick and consist of a
minimum of 1' of backfill covered by filter fabric and a minimum of 1'
earth. - ANSWER ✔ an acceptable alternative is 1' backfill material
and atleast 4" of reinforced concrete or 6" of asphalt paving.
4. the maximum burial depth for fiberglass tanks - ANSWER ✔ 7'
5. the burial depth for steel tanks is? - ANSWER ✔ 5'
6. to provide a firm foundation set tanks on atleast....... of backfill -
ANSWER ✔ 1' thick that extends 1' beyond ends and sides of tank.
7. how many feet of backfill is required between adjacent tanks and tanks
and excavation wals? - ANSWER ✔ 2'
8. excavation material must be stockpiled atleased..... from tank -
ANSWER ✔ 2'
,9. what's the allowed size for pea gravel backfill - ANSWER ✔ 3/4"
10.what's the allowed crushed rock backfill size? - ANSWER ✔ 1/2"
11.install tank gauge probe as close as possible to the? - ANSWER ✔
middle of the tank. avoide atg probe adjacent to the fill pipe or
submersible pump.
12.observation wells locates I the tank excavation and monitoring wells
installed in native soil outside the tank excavation. may be used for leak
detection only if? - ANSWER ✔ the water table is within 20' of the
ground surface all times of the year.
13.construct wells of factory slotted PVC or coated metallic pipe with
0.020-inch openings and allow water or released product to flow freely
into the well. - ANSWER ✔ observation well must be 1 t0 2' below
the bottom of the tank. monitoring well must be 5' below water table to
a maximum of 5'.
14.provide atleast 6" of clearance between piping and electrical conduits.
seperate the piping by atleast twice the size of the piping diameter.
provide atleast 6" between piping g and the excavation walls. -
ANSWER ✔
15.schedule 40 factory wrapped coated steel pipe is the minimum standard
for metallic product piping. - ANSWER ✔ if u ions are installed under
ground they should be 250/300 ground joint onions and provide access
to service.
16.install fill pipe so the top of fill ca pl will be? - ANSWER ✔ 4 to 6"
below the manhole lid.
17.air test new single wall or double wall piping at? - ANSWER ✔ 50
psig
18.It test primary coaxle piping at? - ANSWER ✔ 50 psig for 1 hour.
, 19.for fiberglass secondary piping initial testing, test at? - ANSWER ✔
10 psig, if flexible connectors are used test at 5 psig.
20.dialetric coatings isolate the external surfaces of thank and piping from
the environment and reduce current demand on the catholic protection.
coatings may be? - ANSWER ✔ coal tar foxes, enamels, fiberglass
reinforced plastic or urethane in liquid form, tape or extrusions.
21.One of the significant causes of leaks in underground liquid storage
systems is ____________ ________________ - ANSWER ✔
Improper Installation
22.Written Plans are required to - ANSWER ✔ obtain permits, solicit
bids, and provide precise guidance for installers.
23.The plans should - ANSWER ✔ Describe the property, identify the
size and location of the tanks, indicate the liquids to be stored and
provide the location of the dispensers and piping.
24.Storage systems discussed in this recommended practice are usually
regulated by - ANSWER ✔ Federal, state or local agencies.
25.All owners should ensure that the equipment to be installed meets -
ANSWER ✔ applicable regulatory requirements before being
installed
26.Consult the local authorities who have jurisdiction in the area before
storage-system plans are - ANSWER ✔ finalized or construction is
initiated.
27.A person conducting UST monitoring equipment certification shall
affix tag/sticker on each component and shall include ___ and ___. -
ANSWER ✔ Date certified, replaced or repaired
Contractor/tank tester's license number
28.LLD shall detect release of __ gph and ___ PSI within ___ hour -
ANSWER ✔ 3 gph
10 PSI
, 29.Suction piping shall be tested every ___ years - ANSWER ✔ 3 years
30.Owners/ops of UST shall submit copy of ELD results to local agency
within ___ days of completion of test - ANSWER ✔ 60 days
31.Within ____ hours of unauthorized release, owner/operator should
notify ______. - ANSWER ✔ 24 hours
32.local agency
33.Date that all UDC upgrades shall be completed - ANSWER ✔
December 31, 2003
34.Tanks and piping which have been repaired shall be tested for tightness
within ___ days of completion of repair - ANSWER ✔ 30 days
35.UST shall be inspected every ____ months to verify that temporary
closure measures are still in place - ANSWER ✔ 3 months
36.If UST is removed, soil samples shall be taken.. - ANSWER ✔
beneath removed portions at a minimum of 2 feet at each end of the
tank
37.Within ______ of affixing red tag, local agency shall notify own of
significant violation - ANSWER ✔ 24 hours
38.Location of red tag - ANSWER ✔ Fill pipe
39.Secondary containment system shall contain what amount of a tank if
only one tank is located in containment?
50
100
150
200 - ANSWER ✔ (b)
HSC 25291(a){3), CCR 2631(d)(1)
40.Temporary closure is appropriate for which of the following:
the tank system is empty and will be removed from service indefinitely
