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TM 38-260
WARNING
POLYCHLORINATED BIPHENYL (PCB) IS A CANCER CAUSING SUBSTANCE. IT IS A POISONOUS
ENVIRONMENTAL POLLUTANT AND MUST BE REMOVED AND DISPOSED OF IN ACCORDANCE
WITH ALL APPLICABLE FEDERAL, STATE, AND LOCAL ENVIRONMENTAL REGULATIONS, WHEN
THE SYSTEM CONTAINING THE PCB IS AT A LEVEL ABOVE 50 PARTS PER MILLION (PPM).
SYSTEMS WHICH HAVE BEEN FOUND TO CONTAIN PCBs INCLUDE HYDRAULIC SYSTEMS,
TRANSFORMERS, AND  CAPACITORS.  THEY SHALL, BE INSPECTED AND TESTED WITH
PROCEDURES FOUND IN 40 CFR PART 761.30(E)(1). PCB CONTAMINANTS MAY BE PRESENT IN
TANKS OR OTHER CONTAINERS WHICH ARE CONSIDERED OPE, OR THEY MAY HAVE
CONTAMINATED OTHER ITEMS OF EQUIPMENT WHICH ARE IN USE IN THE IMMEDIATE
VICINITY OF THE CHEMICAL. NEUTRALIZATION AND REMOVAL OF PCB CHEMICALS MUST BE
ACCOMPLISHED THOROUGHLY. A NEUTRALIZING AGENT MAY BE IDENTIFIED BY EITHER THE
USER OR MANUFACTURER OF THE CHEMICAL.
d. Process C-1, any applicable process. Process C-1 is any cleaning process or combination of processes
(mechanical or chemical) that will accomplish a thorough cleaning of an item of IPE without damage to the item or any
component thereof.  The prime considerations here are the removal of all contaminants and protection of the
performance capability of the machine. The methods and materials used for cleaning may include but are not limited to
those listed in MIL-P-116 and this manual. Process C-1 can be used either when required by a specification, contract, or
when MIL-P-116 is cited as the cleaning guide without reference to any specific process.
(1) Mechanical processes are used to remove tightly adhering contaminants. These processes use
abrasive materials, pressure and power tools and often subject the item to severe treatment. Some of the processes are
wire brushing, impact tool cleaning, ultrasonic cleaning, and buffing cleaning.
(a) Wire brushing (power/manual). Wire brushing may be used to remove loose paint, scale, rust, and other
deposits from noncritical surfaces. This method is commonly used on cast surfaces of such items as machine frames,
furnace shells, and structural iron components. Wire brushes should be made of the same material as the metal being
cleaned. Oily or greasy contaminants must be removed before wire brushing. Wire brushing will not remove tightly
adhered mill scale, oxides, or imbedded corrosion.
2-5

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