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A <br /> SECTION 2 <br /> RISKANALYSIS <br /> 2.1 Chemical Hazards <br /> Although there are no khown sources of 'contamination at this facility, it is - - - -• --- <br /> f possible that some products containing hazardous chemicals may be encounterea. <br />{ The chemicals of pnmary concern will be those that may have originated from <br /> gasoline and diesel oil. These chemicals include benzene, ethvibenzene. toluene. <br /> and xvlenes. The toxicologicai properties of these compounds are shown in Table <br /> 2.1. Diesei fuel is a suspect carcinogen. <br /> 2.2 Physical Hazards <br /> 2.2.1 Expiosion <br /> Gasoune vapors can be highly exviosive. having a flash point of about -40°F <br /> Dieset oil is combustible. with a tZash point of 110 to 190°F anti is considerea to be a <br /> moderate fire hazard. <br /> 2.2.2 Heat Stress <br /> The use of protective equipment, if required. may create heat stress. Monitoring <br /> of personnel weanng 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 /> E� performed by a person with a current first aid certification who is trained to <br /> recognize heat stress svmptoms. For monitoring the body's recuperative abilities to <br /> excess heat, one or more of the following techniques will be used. Other methods <br /> f' for determining heat stress monitoring, such as the wet bulb globe temperature - <br /> (WBG'n Index from American Conference of Governmental Indtistrlai Hvgienist <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 early as <br /> possible in the rest period. <br /> If the heart rate exceeds 100 beats per minute at the beginning of the rest <br /> penod. 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 cycie 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 /> I <br /> E SISMOMS/0001 2-1 <br />