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                TG No. 144                                                          August 1987

                                                   CHAPTER 2
                          RECOGNITION, EVALUATION, AND CONTROL OF POTENTIAL HEALTH AND
                           ENVIRONMENTAL HAZARDS ASSOCIATED WITH SPECIFIC OPERATIONS

                2-1. SPRAY PAINTING (recognition).

                    a.   Spray painting saves time over brush painting and is used when large
                volumes of work are performed. It Is especially adaptable to maintenance work
                when blending old and-new surfaces.

                    b. Spray painting results in significant aerosolization of paints and
                solvents. In addition, thinners are uied extensively to achieve the correct
                spraying viscosity. As the thinners evaporate, excessive solvent atmospheric
                concentrations may occur. Painting materials may also contain lead, zinc
                chromate, chromium VI and hexamethylene diisocyanate (HDI). Worker exposure
                to excessive contaminant concentrations may occur In large booths because:

                        (1) Ventilation rates vary In these booths or are inadequate.

                        (2) The potential for reduced air flow in and around equipment to be
                sprayed exists due to dead air pockets or low air flow.

                        (3) The worker is often positioned between the work and 46.e
                ventilation exhaust.

                        (4) The worker does not properly use supplementary personal
                protective equipment (PPE) or the equipment is inadequate.

                        (5) Blow back associated with compressed air units bounces droplets
                into breathing areas.

                    c. Spray cabinets or conveyor-type booths do not present as grea@ a
                potential for exposure because the worker is usually not located between the
rial painted and the source of exhaust ventilation.

                    d. In either operation, statistically valid personal samples must be
                collected for HDI, chromium VI, lead, and the solvents that are used. The
                sampling results determine the required types and level of respiratory
                protection and engineering controls.

                    e. When spray painting is conducted outdoors, the level and type of
                respiratory protection depends on whether the spraying is conducted in a
                confined space or not.






                                                       2-1


                                                                                        72
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 = 00000118.tif

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