MIL-HDBK-1130
b)
Storage Tanks. Areas of concern should be the structural
integrity of the tank top, bottom, shell, and structural parts
as well as the cleanliness of the inside of the tank. Entrance
into the tank for cleaning or testing purposes should not take
place until the tank has been certified gas free, unless proper
clothing and breathing apparatus are used.
Above-Ground Tanks. Remove any tank ballast prior to
(1)
cleaning and testing the tank structure. Remove all
corrosion-preventive compound from tank surfaces to
inspect for corrosion; then re-coat non-fuel-contact
surfaces. Open vents and check their operation and the
condition of the screens.
Underground Metal Tanks. Check vent screens and
(2)
operation. Uncap openings; empty and clean tanks as
necessary following standard safety procedures. Replace
equipment, following normal maintenance checks, as
appropriate, for the storage conditions in which they were
kept.
Underground Concrete Tanks. Remove any ballast from
(3)
rubber-lined tanks and check the liner for holes or
deterioration. Clean and inspect tanks for spalling
concrete or gaping cracks. Pay particular attention to
roofs and wall sections above the frost line, where the
concrete is exposed to freeze-thaw cycles.
(4)
Fueling Pits. Clean and inspect pits, and clear storm
drain lines prior to returning the pit to service. Check
drain line valves and operation of any associated oil/
water separators.
Hoses. Check hoses for dry rot and reusability. In some
(5)
states, hoses are inspected as part of the fuel system and
are certified. Review hose condition criteria with your
EPA and licensing officials. Age of hoses alone may
prohibit their reuse.
Pipelines. Using as-built drawings, trace through each
c)
pipeline to remove caps, plugs, and blank flanges; and
reinstall valves and vents. Remove corrosion preventive-
compound and fully service valves to include proper exercise.
Check all gasketed connections for dry rot. Check for
corrosion on all blank flange connections that will remain in
place. Flush the line and apply the appropriate pressure tests
to ensure system integrity. Reinstall all pieces of ancillary
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