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                 TG No. 144                                                          August 1987
                 2-11. MIXING (recognitio.). All material which Is sprayed must be thinned to
                 achieve the correct viscosity, and the two component coatings require a
                 waiting period before use. This is usually done In a separate area. In
                 addition, this area is usually used to store painting materials.
                 2-12. MIXING (evaluation and control).
                    a. Mixing must be conducted in a well ventilated mixing room or spraying
                 area away from open flames, welding torches. and combustion heaters.
                 Personnel doing the mixing should wear eye protection (i.e., splash goggles or
                 face shield) and clothes providing full skin coverage, especially appropriate
                 gloves.
                    b. Accurate mixing of two component coatings, according to instructions
                 provided with each kit, is crucial since sufficient amounts of material cause
                 chemical polymerization to occur. Graduated containers should be used when
                 mixing small amounts from each component. All mixing containers must be dry
                 and clean. In addition to the operational problems caused by dirty mixing
                 containers or improper mixing proportions, the presence of unreacted Component
                 A or B may present a health hazard to personnel. Unreacted PUP may result in
                 higher than normal isocyanate concentrations, and uncured epoxy resins are
                 known to be strong irritants.
                    c. Since the materials used to thin most paints are classified as class I
                 fire hazard liquids and they will be dispensed in the mixing room, mechanical
                 ventilation is required. The ventilation system must provide at least I cubic
or area, but not less than
                 150 cubic feet per minute. Refer to NFPA Code 30, sections 4-4 and 4-5. The
                 electrical wiring and equipment located in the room must meet class I,
                 division 2, requirements of NFPA Code 70.
                 2-13. OTHER CONSIDERATIONS. Removal of paint by burning is prohibited since
                 toxic gases and vapors will be produced. When chemical paint removers are
                 used, a health hazard may exist since many of these chemicals contain volatile
                 solvents or other materials. Methylene chloride is a constituent of many
                 chemical paint removers.













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Box ID = BX000000
Unit = VII CORPS       
Parent Organization = ARCENT          
Folder Title = PORT OPERATIONS CARC PAINTING POLICY                                                            
Subject = ARMY REGULATION 11-34 (RESPIRATORY PROTECTION PROGRAM
Document Number =        103
Image file name = 00000122.tif

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