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i <br /> � sEcrrorr 2 <br /> RISK ANALYSIS 2.1 Chetaic$i Hazards <br /> Although there are no known sources of contamination at this facility, it is <br /> possible that some products containing hazardous chemicals may be encountered. <br /> The chemicals of primary concern will be those that may have originated from <br /> gasoline and diesel oil. These chemicals include benzene, ethvibenzene. toluene. <br /> and xylenes. The toxicological properties of these compounds are shown in Table <br /> 2.1. Diesel fuel is a suspect carcinogen. <br /> 2.2 Physical Hazards <br /> 2.2.1 Explosion <br /> Gasoline vapors can be highly explosive. having a flash point of about -40T. <br /> Diesel oil is combustible. with a gash point of 110 to 190°F and is considered to be a <br /> moderate fire hazard. <br /> 2.2.2 Heat Stress t <br /> The use of protective equipment, if required. may create heat stress. %4onitoring <br /> of personnel wearing personal protective clothing should commence when the <br /> ambient temperature is 70OF or above. Table 2.2 presents the suggested frequency <br /> for such monitoring. Monitoring frequency should increase as ambient temperature <br /> increases or as slow recovery rates are observed. Heat stress monitoring should be <br /> performed by a person with a current first aid certification who is trained to <br /> recognize heat stress svmptoms. For monitoring the bodv's recuperative abilities to <br /> excess heat, one or more of the following techniques will be used. Other methods <br /> for determining heat stress monitoring, such as the wet bulb globe temperature <br /> (WBG7) Index from American Conference of Governmental Industriai Hygienist <br /> (ACGIH) TLV Booklet can be used. <br /> To monitor the worker, measure: <br /> • Heart rate. Count the radial pulse during a 30-second period as eariv as <br /> possible in the rest period. <br /> - If the heart rate exceeds 100 beats per minute at the beginning of the rest <br /> period. shorten the next work cycle by one-third and keep the rest period <br /> the same. <br /> • If the heart rate still exceeds 100 beats per minute at the next rest period, <br /> shorten the following work cycle by one-third. <br /> • Oral temperature. Use a clinical thermometer (3 minutes under the tongue) <br /> or similar device to measure the oral temperature at the end of the work <br /> period (before drinking). <br /> { <br /> ms/smoutsromt <br /> 2-1 <br />