UFC 3-460-03
21 JANUARY 2003
Attachment 6
TANK IN-SERVICE INSPECTION CHECKLIST
Check off each item when completed.
ITEM
COMMENTS
FOUNDATION
Concrete Ring
1. Inspect for broken concrete, spalling, and cracks,
ٱ
particularly under backup bars used in butt-welded
annular rings under the shell.
2. Inspect drain openings in ring, back of water-drawn
ٱ
basins, and top surface of ring for bottom leakage.
3. Inspect for cavities under foundation and vegetation
ٱ
against tank bottom.
ٱ
4. Check for settlement around perimeter of tank.
Asphalt
1. Check for tank settlement into asphalt base that would
ٱ
direct runoff rainwater under the tank instead of away
from it.
2. Look for areas where oil leaching has exposed the rock
ٱ
filler, indicating a hydrocarbon leak.
Oiled Dirt or Sand
Check for settlement into the base that would direct
ٱ
runoff rainwater under the tank instead of away from it.
Rock
The presence of crushed rock under the steel bottom
usually results in severe underside corrosion. Make a
ٱ
note for additional bottom plate examination (ultrasonic,
hammer testing, or turning of coupons) when the tank is
out of service.
Site Drainage
1. Check site for drainage away from the tank and
ٱ
associated piping and manifolds.
ٱ
2. Check operating condition of the pipe drains.
Housekeeping
Inspect the area for buildup of trash, vegetation, and
ٱ
other inflammables.
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