MIL-HDBK-1110
d)
Oxygen deficiencies - especially in confined areas
Dusts include smoke particles from combustion. Gases
and some particles may not be seen by the naked eye. Any of
these products resulting from painting operations may require a
cartridge-type respirator. Specific recommendations for
respiratory protection should come from a workplace evaluation of
potential exposures.
13.6
Hazards in Different Painting Operations. Painting
procedures may include one or more of the following hazardous
operations: surface preparation, paint application, and working
in high, confined, or remote places.
13.6.1
Surface Preparation. Surface preparation hazards occur
in abrasive and water blasting operations, mechanical cleaning,
chemical cleaning, and high temperature operations. Protection
of workers and the environment from dust containing toxic metals
(such as lead, cadmium, or chromate compounds) produced during
removal of old paint is discussed in Section 3.
13.6.1.1 Abrasive and Water Blasting. Abrasive and water
blasting are by far the most dangerous operations concerned with
surface preparation for painting. High-pressure nozzles (over
100 psi for abrasive and over 30,000 psi for water blasting) pose
major threats. Hoses and couplings must be checked for
soundness, and the pot pressures must be checked to ensure that
the maximum allowable pressures are not exceeded. The blast
nozzle must have a deadman valve, so that it will automatically
shut off, if it is lost by the blaster. No attempt should be made
to override this or other safety devices. No safety omissions
should be permitted, even for very small blasting jobs. The
blasting area should be posted for no admittance, and the pot
tender located in a protected area behind the blaster, so that no
one is in the vicinity of the blaster. Each person in the
operation should wear the proper safety equipment, including an
air-supplied respirator (type CE) specifically designed for the
blaster.
Isolation from the blaster and use of deadman valves
are also important during water blasting. Electrical operations
should be shut down at that time to prevent electrical shock.
Care should also be taken to avoid slipping on wetted surfaces.
13.6.1.2 Mechanical Cleaning. Grinders, sanders, and other
powered cleaning tools require special attention to meet the
safety provisions of Subpart P of OSHA Standard 29 CFR 1910.
They should have safety shields or devices to protect eyes and
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