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r <br /> The most significant risk associated with € <br /> petroleum fuels is <br /> exposure to aromatic compounds. Skin contact will be eliminated <br /> by use of clothing, eye wear, and gloves and the inhalation <br /> hazard will be minimized using appropriate respiratory protective a <br /> devices as determined by on-site air monitoring. The Safety ` <br /> Coordinator/Project Manager will establish an exclusion zone y <br /> encompassing a 50 foot radius from the work area. Access within <br /> this zone will be limited to required personnel. Total organic <br /> vapors will be monitored within the exclusion zone using a ^: <br /> photolonization detector (PID) calibrated for benzene the most <br /> toxic of the aromatic hydrocarbons. Current enforceable and <br /> recoranendeu exposure limitations for potential site contaminants <br /> are prezented in Table 1. Also presented in Appendix I is <br /> i additional hazard information on these compounds. <br /> Table 1 ? . <br /> Hazard Exposure Cuidelines <br /> t . <br /> Substances Cal OSHA 1988-89 ACGIH <br /> TLV <br /> -------------------------------------------------------- <br /> Benzene ppm (TWA) 10 PPm (TWA) <br /> 25 - <br /> Ppm (EXC) 25 ppm (STEL) a <br /> *; 50 PPm (Ceiling) = r <br /> Toluene <br /> 100 ppm (TWA) 100 ppm (TWA) <br /> i 300 PPm (Ceiling; 150 PPm (STEL) <br /> Xylene 100 PPm (TWA) <br /> 100 ppm (TWA) <br /> 150 ppm .(STEL) a <br /> r <br /> r Gasoline <br /> sf 300 ppm (TWA) 300 ppm (TWA) <br /> 500 PPm (STEL) <br /> t' * Possible contaminants that could be encountered as <br /> presently known. <br /> r <br /> 7. <br /> f L <br /> l7OSOfH�..'8' <br />