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a9010i <br /> Eli. 01 <br /> SECTIGN 2 <br /> RISK ANALYSIS � <br /> 2.1 CHEMICAL HA7.-UDS <br /> A number of products containing hazardous chemicals may be <br /> encountered at UST sites. Detailed information on the nature of <br /> these hazards may he found on the Material Safety Data Sheets <br /> (MSDS) provided by AES. These MSDS will be available on-site and <br /> at the AES offices involved. <br /> The chemicals of primary concern will be those originating from <br /> leaded and unleaded gasoline. These chemicals included benzene, <br /> ethylbenzene, toluene, and xylenes. <br /> 2.2 PHYSICAL HAZARDS <br /> 2.2.1 Explosion <br /> Gasoline vapors can be highly explosive, having a flash point of <br /> about -40 F, and are considered to be a fire hazard. <br /> 2.2.2 Heat Stress <br /> The use of protective equipment, if required, may create heat <br /> stress. Monitoringof <br /> personnel wearing personal protective " <br /> clothing should commence when the ambient temperature is 70 F of <br /> above. Monitoring frequency should increase as the ambient <br /> temperature increases or as slow recovery rates are observed. <br /> Heat-stress monitoring should be performed by a person with a <br /> current first aid certification who is trained to recognize heat <br /> stress symptoms. For monitoring the body's recuperative abilities <br /> to excess heat, the following techniques will be used. Other <br /> methods for determining heat-stress monitoring, such as the wet <br /> bulb globe temperature (WBGT) Index from American Conference of <br /> Governmental Industrial Hygienist (ACGIH) TLV Booklet can be used. <br /> To monitor the worker, measure; <br /> o Heart rate. Count tae radial pulse during a 30-second period <br /> as early as possible in the rest period. <br /> Early symptoms of heat stress include rashes, cramps, <br /> diocomfort and drowsiness, which may lead to impaired functional <br /> ability, putting a worker and his co-workers at risk. Continued <br /> heat stress may lead to heat stroke and possibly death. Avoiding <br /> overprotection, careful training and frequent monitoring of <br /> personnel who wear protective clothing, judicious scheduling of <br /> -_ work- and rest periods, and frequent replacement of fluids can <br /> protect against the threat of suffering heat strbmss. <br /> 2-1 <br />