A+ Graded Paper
U1 UST Installer’s Guide | Full Retrofitting & Setup
Protocols + Best Practice
Questions and Mark scheme
Version: Final 1.1
,43. To avoid undermining foundations of existing structures excavation must be done - ✔✔A. Carefully
B. Tentatively
C. Quickly
D. Efficiently
Answer A
44. What is the determinant of the total depth of the tank excavation. - ✔✔A. Tank diameter, bedding-thickness, hold-
down pad(If required), depth of cover, and slope and length of piping.
B. Slope and length of piping, depth of cover, hold down pad(If required), thickness, amount of dirt
C. Thickness, hold-down pad(If required), depth of cover, bedding, previous leaks or spills
D. Slope and length of piping, thickness, amount of dirt, depth of cover, bedding, thickness.
Answer A
45. Much of a buried tanks support is derived from __________ - ✔✔A. Compacted backfill
B. Chain-falls
C. Reinforced steal walls
D. Concrete
Answer A
46. _______ ____________ are geotextiles designed to prevent movement of back-fill materials, while permitting water
to pass through - ✔✔Filter fabrics
47. To provide a firm foundation for the tank, set the tank on a bed of ___________ material one foot thick that extends
one foot beyond the ends and sides of the tank. - ✔✔backfill
48. ___ feet of backfill must be placed between adjacent tanks and between tanks and excavation walls. - ✔✔A. 1
B. 2
, C. 3
D. 4
Answer B
49. In areas subject to vehicle traffic, cover may consist of at least _________ inches of compacted backfill and ________
inches of asphaltic concrete, or___________ inches of reinforced concrete - ✔✔30, 6, 18
50. Maximum burial depth, measured from the top of the tank, are established by tank __________ and
________________ - ✔✔A. Manufacturers and the installers
B. Independent testing laboratories
C. Installers and independent testing labs
D. Installers and the tank owner
E. Manufacturers
F. Both B and E
Answer F
1. One of the significant causes of leaks in underground liquid storage systems is ____________ ________________ -
✔✔Improper Installation
2. Written Plans are required to - ✔✔obtain permits, solicit bids, and provide precise guidance for installers.
3. The plans should - ✔✔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.
4. Storage systems discussed in this recommended practice are usually regulated by - ✔✔Federal, state or local
agencies.
5. All owners should ensure that the equipment to be installed meets - ✔✔applicable regulatory requirements before
being installed
6. Consult the local authorities who have jurisdiction in the area before storage-system plans are - ✔✔finalized or
construction is initiated.
7. All owners should ensure that the equipment to be installed meets all applicable regulatory requirements before -
✔✔Being installed.
U1 UST Installer’s Guide | Full Retrofitting & Setup
Protocols + Best Practice
Questions and Mark scheme
Version: Final 1.1
,43. To avoid undermining foundations of existing structures excavation must be done - ✔✔A. Carefully
B. Tentatively
C. Quickly
D. Efficiently
Answer A
44. What is the determinant of the total depth of the tank excavation. - ✔✔A. Tank diameter, bedding-thickness, hold-
down pad(If required), depth of cover, and slope and length of piping.
B. Slope and length of piping, depth of cover, hold down pad(If required), thickness, amount of dirt
C. Thickness, hold-down pad(If required), depth of cover, bedding, previous leaks or spills
D. Slope and length of piping, thickness, amount of dirt, depth of cover, bedding, thickness.
Answer A
45. Much of a buried tanks support is derived from __________ - ✔✔A. Compacted backfill
B. Chain-falls
C. Reinforced steal walls
D. Concrete
Answer A
46. _______ ____________ are geotextiles designed to prevent movement of back-fill materials, while permitting water
to pass through - ✔✔Filter fabrics
47. To provide a firm foundation for the tank, set the tank on a bed of ___________ material one foot thick that extends
one foot beyond the ends and sides of the tank. - ✔✔backfill
48. ___ feet of backfill must be placed between adjacent tanks and between tanks and excavation walls. - ✔✔A. 1
B. 2
, C. 3
D. 4
Answer B
49. In areas subject to vehicle traffic, cover may consist of at least _________ inches of compacted backfill and ________
inches of asphaltic concrete, or___________ inches of reinforced concrete - ✔✔30, 6, 18
50. Maximum burial depth, measured from the top of the tank, are established by tank __________ and
________________ - ✔✔A. Manufacturers and the installers
B. Independent testing laboratories
C. Installers and independent testing labs
D. Installers and the tank owner
E. Manufacturers
F. Both B and E
Answer F
1. One of the significant causes of leaks in underground liquid storage systems is ____________ ________________ -
✔✔Improper Installation
2. Written Plans are required to - ✔✔obtain permits, solicit bids, and provide precise guidance for installers.
3. The plans should - ✔✔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.
4. Storage systems discussed in this recommended practice are usually regulated by - ✔✔Federal, state or local
agencies.
5. All owners should ensure that the equipment to be installed meets - ✔✔applicable regulatory requirements before
being installed
6. Consult the local authorities who have jurisdiction in the area before storage-system plans are - ✔✔finalized or
construction is initiated.
7. All owners should ensure that the equipment to be installed meets all applicable regulatory requirements before -
✔✔Being installed.
