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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 (10) minutes in the should be removed promptly and not reworn until the employee's breathing zone (air that would most nearly xylene is removed from the clothing represent that inhaled by the employee) A minimum of . Employees should be provided with and required to three (3) measurements should be taken on one work use spm-proof safety goggles where liquid or solid shift and the highest of all measurements taken is an xylene may contact the eyes. estimate of the employee's exposure • Method SANITATION Sampling and analyses may be performed by collection of vapors using an adsorption tube with subsequent Skin that becomes contaminated with xylene should desorption with carbon disulfide and gas chromatogra- fi phic analysis Also, detector tubes certified by NIOSH be promptly washed or showered with soap or mild I under 42 CFR Part 84 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 method for xylene is in the 1VIOSHManual ojAnalytics.I wash thea 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 017-033-00261.4) COMMON OPERATIONS AND CONTROLS RESPIRATORS The following list includes some common operations in •; Good industrial hygiene practices recommend that which��o to xylene may occur and control meth- ads which may be effective in each case engineering controls be used to reduce environiaeatal concentrations to the permissible exposure level. How- Operation a afr cols ever, there are some exceptions where resptrators may be used to control exposure- Respirators may be used Use as an intermediate Process enclosure; when engmemng and work practice controls are not durmig manufaCtwe of local exhaust technically feasible. when such controls are in the plastics, synthetic venblabon,general process of being installed,or when they fall and need to fbeM and mixed/pure mechanical ventilation, be supplemented Respirators may also be used for mortem personal protective operations which require entry tato tanks or closed equipment vessels, and in emergency situations. If the use of Use as diluent or Process enclosure; respirators is necessary, the only respirators permitted gown in surface local exhaust are those that have been approved by the Mme Safety coatings, Ping ventilation; general and Health Admmistratioti (formerly Mining Enforce- operations,and mechanical ventilation; mcnt and Safety Adnuniatration) or by the National rriariulai:tur�e Of ribber; personal protective Institute for Occupational Safety and Health. ��agentnrn m equipment • In addition to respirator selection,a complete respira- plastics and electronics tory Protns on Program should be instituted which manufacture, too rpt includes regular training, mamtenaace, inspection, cleaning,and evaluation. synthesis reactions and manufacture of epoxy PERSONAL PROTECTIVE EQUIPMENT mains • Employees should be provided with and required to Use in formulation of Process enclosure; use impernous clathcng,gloves.face shields(eight-inch insecticides local exhaust ventilation; general minimum), and other appropriate protective clothing necessary to prevent repeated or prolonged skm contact rtiechanicail ventllaborn with liquid or solid xylene. Person Protective • Qothmg contaminated with xylene should be placed equipment in closed containers for storage until it can be discarded Use in manutactwe of or until Process andoswe; ( prnvtsiori is trade for the removal of xylene xylene-ft analdehyde local exhaust r from the clothing. If the clothing is to be laundered or resins; pharnmtoeubcaK ventilation; general otherwise cleaned to remove the xylene, the person wbmns, leather;and me&mucal vendlaetion; performing the operation should be mfortned of xy- as a stenihmV agent for personal protective lene's hazardous properties. Cat-gut and in equipment • Any clothing which becomes wet with liquid xylene Isy should be removed unmediately and non-unpervwus saRtembw 1978 XVONW 3