U1 UST Installation/Retrofitting
Exam | Complete Q&A Review with
Accurate Verified Answers | Graded
A+
• 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.
• 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.
• the maximum burial depth for fiberglass tanks . Answer: 7'
• the burial depth for steel tanks is? . Answer: 5'
• to provide a firm foundation set tanks on atleast....... of backfill .
Answer: 1' thick that extends 1' beyond ends and sides of tank.
• how many feet of backfill is required between adjacent tanks and tanks
and excavation wals? . Answer: 2'
, • excavation material must be stockpiled atleased..... from tank . Answer:
2'
• what's the allowed size for pea gravel backfill . Answer: 3/4"
• what's the allowed crushed rock backfill size? . Answer: 1/2"
• when sand is used for backfill you must compacted is ....... lifts .
Answer: 12 to 18" lifts and must compact after each lift. repeat until this
level is atleast 60% of vertical height of tank.
• when deadmen are used you should place them where? . Answer:
outside of the tank diameter.
• a bottom hold down pad consists of what? . Answer: 8" of reinforced
concrete that extends atleast 8" beyond the tank sides and 1' beyond each
end.
• hold down straps for steel tanks should be? . Answer: non metallic or
flat steel. the use of wire ropes or round bar is not acceptable.
• electrical isolation for straps on steel and composite tanks may be? .
Answer: nonmetallic, fully encapsulated or isolated with material placed
between the strap. isolating material should be atleast 1/8" thick, wider
then the strap and should extend 1' beyond the widest part of the tank.
Exam | Complete Q&A Review with
Accurate Verified Answers | Graded
A+
• 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.
• 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.
• the maximum burial depth for fiberglass tanks . Answer: 7'
• the burial depth for steel tanks is? . Answer: 5'
• to provide a firm foundation set tanks on atleast....... of backfill .
Answer: 1' thick that extends 1' beyond ends and sides of tank.
• how many feet of backfill is required between adjacent tanks and tanks
and excavation wals? . Answer: 2'
, • excavation material must be stockpiled atleased..... from tank . Answer:
2'
• what's the allowed size for pea gravel backfill . Answer: 3/4"
• what's the allowed crushed rock backfill size? . Answer: 1/2"
• when sand is used for backfill you must compacted is ....... lifts .
Answer: 12 to 18" lifts and must compact after each lift. repeat until this
level is atleast 60% of vertical height of tank.
• when deadmen are used you should place them where? . Answer:
outside of the tank diameter.
• a bottom hold down pad consists of what? . Answer: 8" of reinforced
concrete that extends atleast 8" beyond the tank sides and 1' beyond each
end.
• hold down straps for steel tanks should be? . Answer: non metallic or
flat steel. the use of wire ropes or round bar is not acceptable.
• electrical isolation for straps on steel and composite tanks may be? .
Answer: nonmetallic, fully encapsulated or isolated with material placed
between the strap. isolating material should be atleast 1/8" thick, wider
then the strap and should extend 1' beyond the widest part of the tank.
