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h <br /> Chemical Contamination <br /> The chemical health and safety hazard of this project is the possible inhalation of or direct <br /> contact with gasoline from contaminated soil and groundwater Gasoline vapors (50 to 100 <br /> octane) are moderately to highly toxic via inhalation and may cause eye disturbances Inhalation <br /> of gasoline vapors can cause central nervous system depression. pneumonitis, tatal pulmonary <br /> edema (high concentrations) <br /> Gasoline also poses fire and explosion hazards when present in sufficient concentrations <br /> (percent by volume in air) In addition, gasoline can react vigorously with oxidizing materials <br /> resulting in fire <br /> 1 <br /> Table 1 presents exposure limits for key chemicals that may be present at the site <br /> Physical Hazards <br /> Working around a drill rig can be dangerous Field personnel should take precautions while <br /> working around the ng Tratfic may also pose a threat Field personnel should use tratfic <br /> diversion techniques and be aware' <br /> Sunburn <br /> Working outdoors on sunny days for extended periods of time can cause sunburn to the <br /> skin. Excessive exposure to sunlight is associated with the development of skin cancer. Field <br /> staff should take precautions to prevent sunburn by using sun-screen lotion and/or wearing hats <br /> and long-sleeved garments <br /> Heat Stress <br /> The potential for heat stress is a concern when field activities are performed on warm. sunny <br /> days, and is accentuated when chemical protective clothing is worn Heat stress prevention <br /> measures and monitoring will be implemented if site temperatures are above 70 degrees <br /> Fahrenheit P. <br /> Precautions to prevent heat stress will include work/rest cycles so that rest periods are taken <br /> before excessive fatigue occurs, and regular intake of water to replace that lost from sweating. <br /> Work/rest cycles will be based on monitoring the heart rate (pulse) of each individual worker <br /> Rest breaks will be long enough to reduce the heart rate (HR) below levels calculated according <br /> to the following method <br /> 1 The worker will initially determine their resting HR prior to starting work activities <br /> 2. At the start of the first rest period, the worker will determine their HR. This initial HR <br /> should not exceed the individual's age-adjusted maximum HR, which equals ((0 7)(220 <br /> - age in years)] At 1 minute into the rest period, the recovery HR will be determined. <br /> The recovery HR should not exceed 110 beats per minute. <br /> 7e0sxEPORTsvcMAMLS]HP <br />