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1 ppmv benzene . This level is one tenth of the current occcupa- <br /> tional Permissible Exposure Limit (PEL) for an 8 hour exposure <br /> to benzene. <br /> Action Levels Of Hydrocarbon Components in Petroleum Fuel: <br /> Gasoline >300ppm FEL LEL > 10% <br /> Benzene > 1ppm '" oxygen <19 .5% <br /> Toluene >100ppm <br /> Xylene >100ppm " <br /> Ethyl Benzene >100ppm <br /> A hydrocarbon vapor analyzer will be used to measure real time <br /> breathing zone concentration for comparison with the 100 ppmv <br /> working limit. When a persistent level of 100 ppmv is observed , <br /> appropriate respirators will be donned and other vapor <br /> measurements will be made . It hydrocarbon vapors exceed 1000 <br /> ppmv or 10 ppm benzene , work will be stopped. the field crew <br /> will be instructed to stay up wind and methods will be applied <br /> to subdue fugitive vapor emissions such as sprinkling soil <br /> with water, or the use of copus blower. <br /> The site Safety Officer will make such determinations . <br /> If LEL is >10% in or around the tank, work must atop and not <br /> • commence until determined safe and/or LEL% <10%. <br /> If oxygen levels in the immediate work area are < 19 . 5%, work <br /> must stop until determinated safe and/or levels are >19 . 5% . <br /> Symptoms Of Acute overexposure: Gasoline and gasoline vapors <br /> maybe irritating to the skin , eyes and respiratory tract. <br /> Gasoline vapors may effect the central nervous system and may <br /> cause headaches and dizziness . <br /> Oxygen Deficiency: <br /> May cause dizziness . <br /> • <br />