b) Partially fill tanks insufficiently anchored
against flotation with water to prevent buoyancy. Provide
adequate safeguards where there is danger of the water
c) Provide a minimum of 12 inches (300 mm) of water
in rubber-lined concrete tanks.
d) Leave vent lines on underground tanks open and
make sure the vents are adequately screened.
e) Tightly cap or plug all other tank openings after
removal of equipment.
f) Provide release detection where fuel is left in
g) Comply with 40 CFR 280 and any applicable state
and local environmental regulations.
Tank Level Controls
a) Remove controls such as float control valves,
float-operated gauges, low level cutoffs, water detector
locks, and probes from tanks.
b) Clean, treat with corrosion-preventive compound,
and store controls in a dry place.
a) Drain and vacuum extract all fuel from the
b) If possible, pig the pipeline to remove any
c) Blind all flange connections and vents.
e) Continue to provide cathodic protection and