API PSD 2202
DISMANTLING AND DISPOSING OF STEEL FROM TANKS WHICH HAVE CONTAINED LEADED GASOLINE
|Publication Date:||1 October 1975|
The dismantling of tanks which have been used for the storage of leaded gasoline and the disposal of steel or other material there from presents potential exposure of workmen to lead antiknock compounds. This potential exposure results from the presence of vapors, fumes and dusts of such compounds which may be breathed.
Local conditions usually dictate the mechanical method of tank dismantling. Flame-cutting or air-driven cold-cutting tools may be used to good advantage. Tanks may be cut from the inside or outside. However, if the economics and mechanics of the situation permit, it is preferable to work from the outside of a tank to ensure clean air for personnel. Respiratory protection is required under certain conditions.
In unlined tanks, the greatest amount of lead contamination will occur on the bottom shell ring and the bottom plates as a result of their constant, prolonged contact with sludge. In lined tanks, the application of heat, as from a cutting torch, may volatize lead compounds absorbed in or trapped behind the lining. In addition, heat-induced decomposition products of the lining may have toxic properties. Therefore, precautions against breathing such vapors or fumes are of utmost importance.