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should consist of a ten (10) minute sample or series of clothing which becomes contaminated with xylene consecutive samples totalling ten (I0) minutes in the should be removed promptly and not reworn until the employee's breathing zone (air that would most nearly xylem is removed from the clothing. represent that inhaled by the employee). A minimum of , { three (3) measurements should be taken on one work Employees should be provided with and required to shift and the highest of all measurements taken is an use splash-proof safety goggles where liquid or solid estimate of the employee's exposure. xylene may contact the eyes. • Method Sampling and analyses may be performed by collection SANITATION of vapors using an adsorption tube with subsequent Skin that becomes contaminated with xylene should desorption with carbon disulfide and gas chromatogra- phic analysis. Also, detector tubes certified by NIOSH be Promptly waved or showered with soap or mild under 42 CFR Part 94 or other direct-reading devices detergent and water to remove any xylene. calibrated to measure xylene may be used.An analytical • Employees who handle liquid or solid xylene should t method for xylene is in the NIOSH Manual ojAnvlytic,/ wash their hands thoroughly with soap or mild deter- Methods. 2nd Ed., Vol. 3, 1977, available from the gent and water before eating, smoking, or using toilet Government Printing Office, Washington. D.C. 20402 facilities. ' (GPO No.0I7-033-00261-4). COMMON OPERATIONS AND CONTROLS RESPIRATORS The following list includes some common operations in • Good industrial hygiene practices recommend that which exposure to xylene may occur and control meth- engineering controls be used to reduce environmods which may be effective is each cage: concentrations to the permissible exposure level.How- Operation Controls ever, there are some exceptions where respirators may be used to control exposure. Respirators tray be used Use as an interme"te Process enclosure; when engineering and work practice controls are not during manufacture of local exhaust ' technically feasible, when such controls are in the plastics, synthetic ventilation;general Process of being installed,or when they fail and treed to fibers, and mixed/pure mechanical ventilation; be supplemented. Respirators may also be used for isomers operations which require entry into tanks or closed personal protective equipment vessels, and in emergency situations. If the use of respirators is necessary, the onlyUse diluent or Proce respirators permitted ss enclosure; local exhaust' are those that have been approved by the Mine Safety solvent in surface - and Health Administration (formerly Mining Enforce. coatings, printing ventilation; general meet and Safety Administration) or by the National operations,and mechanical ventilation; Institute for Occupational Safety and Health. manufacture of rubber; personal protective ' In addition to respirator selection,a complete respire- degreasing agent in equipment wry protection program should be instituted which Plastics and electronics includes regular training, maintenance, inspection, manufacture; in organic ' cleaning,and evaluation. sYnthesis reactions and manufacture of epoxy PERSONAL PROTECTIVE EQUIPMENT qtr's us Employeesshould be provided with and insecti Use in formulation of Process enclosure; required to e impervious clothing,gloves,face shields(eight-inch Bides local exhaust minimum), and other appropriate protective clothing ventilation;general ' necessary to prevent repeated or prolonged shin contact mechanical ventilation; with liquid or solid xylenm personal protective • Clothing contaminated with xylene should be placed equipment ' in closed containers for storage until it can be discarded Use in is manufacture of Process enclosure; or until provision made for the remount of xylene Process local exhaust from the clothing. If the clothing is to be laundered or resins;pharmaceuticals, ventilation;general otherwise cleaned to remove the xylene, the person vitamins, leather, and Performing the operation should be informed of xy- as a steric agent for mechanical ventilation; lene's hazardous properties, inn9 Pelsortai protective Any clothing which becomes wet with liquid xylene cat-gut and in equipment microscopyshould be removed immediately and non-impervious ' ssptaenbrr 197a XyNrm 3