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13 <br /> La <br /> Hazard Analysis <br /> 0-0 The chemical health and safety hazard of this project is the possible inhalation of or <br /> direct contact with gasoline from contaminated soil. <br /> Gasoline vapors (50-100 octane) are moderately to highly toxic via inhalation. <br /> Inhalation of gasoline vapors can cause central nervous system (CNS) depression, <br /> pneumonitis, fatal pulmonary edema (high concentrations), and some addiction. The vapors <br /> are considered moderately toxic and may cause eye disturbances, the TLV for gasoline in <br /> air is 300 ppm. <br /> ++ Gasoline also poses fare and explosion hazards when present in sufficient <br /> concentrations (percent by volume in air). Gasoline can react vigorously with oxidizing <br /> materials resulting in fire. Exposure of gasoline vapor to flame or excessive heat may <br /> result in fire or explosion (lower explosive level 1.3 percent, upper explosive level is 6.0 <br /> percent).1 <br /> La On-site nonchemical hazards are working around heavy equipment and possible heat <br /> stress. While working at the site, the field personnel must be aware of heavy equipment <br /> movement around and general traffic. <br /> Lo <br /> To prevent heat stress, work breaks should be taken as needed. A schedule may be <br /> set up prior to field work (i.e., 15 minute breaks for every hour of work) and then adjusted <br /> t, to field conditions. The worker can also monitor heart rate as an. indicator of heat stress. <br /> 1. Determine resting heart rate (HR) before work begins. <br /> 2. Monitor HR at the beginning of each break period. This HR should not exceed <br /> the individual's age adjusted HR [(0.7)(220-age in years)]. At 1 minute into the <br /> La rest period, the recovery HR should not exceed 110 beats/minute. <br /> 3. If the initial break period HR exceeds the age adjusted HR or the recovery HR <br /> v exceeds 100 beats/minute, the next work period should be decreased by 10 <br /> minutes. <br /> k. <br /> Heat stress due to water loss can be prevented: <br /> 1. The sense of thirst is not an adequate regulator of water replacement needs. <br /> LO <br /> Therefore, water must be replaced at regular intervals. <br /> a. Before work, drink two 8-ounce glasses of water. <br /> b. During each rest period drink at least two 8-ounce glasses of water. <br /> 2. A large cooler of water is readily available in the support vehicle (the Site Safety <br /> Officer must confirm that water is available). Use plain water or dilute (3:1) fruit <br /> '� juice or electrolyte replacement drinks. Never use salted water or salt tablets. <br />