Current through Register Vol. 24-06, March 15, 2024
All respirators required by this section must meet the
requirements of chapter 296-842 WAC.
(1) Paints mixed with toxic vehicles or
solvents.
(a) When employees spray paints
mixed with toxic vehicles or solvents, you must ensure that the following
conditions are met:
(i) In confined spaces,
employees continuously exposed to spraying are protected by air line
respirators.
(ii) In tanks or
compartments, employees continuously exposed to spraying are protected by air
line respirators. Where mechanical ventilation is provided, employees are
protected by respirators.
(iii) In
large and well ventilated areas, employees exposed to spraying are protected by
respirators.
(b) You must
ensure that where employees apply by brush paints with toxic solvents in
confined spaces or other areas where lack of ventilation creates a hazard, the
employees are protected by filter respirators.
(c) When flammable paints or vehicles are
used, precautions must be taken in accordance with the requirements of WAC
296-304-03009.
(d) The metallic parts of air moving devices,
including fans, blowers, and jet-type air movers, and all duct work must be
electrically bonded to the vessel's structure.
(2) Paints and tank coatings dissolved in
highly volatile, toxic and flammable solvents. Several organic coatings,
adhesives and resins are dissolved in highly toxic, flammable and explosive
solvents with flash points below 80°F. Work involving such materials must
be done only when all of the following special precautions have been taken:
(a) Sufficient exhaust ventilation must be
provided to keep the concentration of solvent vapors below ten percent of the
lower explosive limit. Frequent tests must be made by a competent person to
ascertain the concentration.
(b) If
the ventilation fails or if the concentration of solvent vapors reaches or
exceeds ten percent of the lower explosive limit, painting must be stopped and
the compartment must be evacuated until the concentration again falls below ten
percent of the lower explosive limit. If the concentration does not fall when
painting is stopped, additional ventilation to bring the concentration down to
ten percent of the lower explosive limit must be provided.
(c) Ventilation must be continued after the
completion of painting until the space or compartment is gas free. The final
determination as to whether the space or compartment is gas free must be made
after the ventilating equipment has been shut off for a least ten
minutes.
(d) Exhaust ducts must
discharge clear of working areas and away from sources of possible ignition.
Periodic tests must be made to ensure that the exhausted vapors are not
accumulating in other areas within or around the vessel or dry dock.
(e) All motors and control equipment must be
of the explosion-proof type. Fans must have nonferrous blades. Portable air
ducts must also be of nonferrous materials. All motors and associated control
equipment must be properly maintained and grounded.
(f) Only nonsparking paint buckets, spray
guns and tools must be used. Metal parts of paint brushes and rollers must be
insulated. Staging must be erected in a manner which ensures that it is
nonsparking.
(g) Only explosion
proof lights, approved by the Underwriters' Laboratories for use in Class I,
Group D atmospheres, or approved as permissible by the U.S. Bureau of Mines or
the U.S. Coast Guard, must be used.
(h) A competent person must inspect all power
and lighting cables to ensure that the insulation is in excellent condition,
free of all cracks and worn spots, that there are no connections within fifty
feet of the operation, that lines are not overloaded, and that they are
suspended with sufficient slack to prevent undue stress or chafing.
(i) The face, eyes, head, hands and all other
exposed parts of the bodies of employees handling highly volatile paints must
be protected according to WAC
296-304-090. All footwear must be
nonsparking, such as rubbers, rubber boots or rubber soled shoes without nails.
Coveralls or other outer clothing must be made of cotton. Rubber gloves,
instead of plastic gloves, must be used to protect against the danger of static
sparks.
(j) No matches, lighted
cigarettes, cigars, or pipes, and no cigarette lighters or ferrous articles
must be taken into the area where work is being done.
(k) All solvent drums taken into the
compartment must be placed on nonferrous surfaces and must be grounded to the
vessel. Metallic contact must be maintained between containers and drums when
materials are being transferred from one to another.
(l) Spray guns, paint pots, and metallic
parts of connecting tubing must be electrically bonded, and the bonded assembly
must be grounded to the vessel.
(m)
You must ensure that all employees continuously in a compartment in which such
painting is performed, are protected by air line respirators and by suitable
protective clothing. Employees entering such compartments for a limited time
must be protected by filter cartridge type respirators.
(n) You must ensure that all employees doing
exterior paint spraying with such paints are protected by suitable filter
cartridge type respirators and by suitable protective clothing.
Statutory Authority:
RCW
49.17.010,
49.17.040,
49.17.050,
49.17.060. 05-03-093, §
296-304-03007, filed 1/18/05, effective 3/1/05; 03-04-099, §
296-304-03007, filed 2/4/03, effective 8/1/03. Statutory Authority:
RCW
49.17.040,[49.17].050 and [49.17].060.
98-02-006, § 296-304-03007, filed 12/26/97, effective 3/1/98. Statutory
Authority: Chapter 49.17 RCW. 95-04-006, § 296-304-03007, filed 1/18/95,
effective 3/10/95; 93-19-142 (Order 93-04), § 296-304-03007, filed
9/22/93, effective 11/1/93; Order 76-7, § 296-304-03007, filed 3/1/76;
Order 74-25, § 296-304-03007, filed
5/7/74.