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Y... .r-•_,_C.:°�ti.s...,�..�z-auFas'a.r �e,..-�-3r.''-.'.'e�i—^=L, „�`,-:�--a^s-5�-?-..--- w +a#-"5:�,.;�.;.G z.�?.- ..wf>,_-:d'e .a.,-. r."�.,>'..:.�t"..:.":o�.,.�.a.. yF• -::w.6. .,�1�/�_':;i ' +- s�r":`.. T'g. ' 'ter-'''' -- .as.. �r ya. �u `'`?�,`:�?,=s-! v PIPET, Yn' -Y _a, ' � �sib'.�'" S �F �ii:r9�r�r"w�'r. ialY� �.aa�=ds:ft�r4�:�„vA•" '�:au'wY��irlftrai B(Ea'+t t w z�`�4�f��5•7��r�. �,s� -,yb:�s� 3Fi,+d:v R 2 Hazard Analysis The chemical health and safety hazard of this pra�,ect is the possible inhalation of or direct contact with gasoline from contaminated soil. Gasoline vapors (50-100 octane) are moderately to highly toxic via inhalation. Inhalation of gasoline vapors can cause central nervous system (CNS) depression, pneumonitis, fatal pulmonary edema (high concentrations), and some addiction. The vapors rue considered moderately toxic and may cause eye disturbances, the TLV for gasoline in air is 300 ppm. Gasoline also poses fire aeid explosion hazards when present in sufficient concentrations (percent by volume in air). Gasoline can react vigorously with oxidizing materials resulting in fire. Exposure of gasoline vapor to flame or excessive heat may result lfire or explosion (lower explosive level 1.3 percent, upper explosive level is 6.0 On-site nrnchemical hazards are working around heavy equipment and possible heat stress. While working at the site, the field personnel must he aware of heavy equipment movement and general traffic. To prevent heat stress, work breaks should be taken as needed. A schedule may be set up prior to field work (ie. 15 minute breaks for every hour of work) and then adjusted to field conditions. The worker can also monitor heart rate as an indicator of heat stress. 1. Determine resting bc;rt rate (HR) before work begins. 2. Monitor HR at the beginning of each break period. This HR should not exceed the individual's age adjusted HR [(0.7)(220-age in years)). At I minute into the rest period the recovery HR should not exceed 110 beats/minute. i I If the initial break period HR exceeds the age adjusted HR or the recovery HR exceeds 100 beats/minute, the next work period should be decreased by 10 minutes, Meat stress due to water less can be prevented: I. The se.-se of thirst is not an adequate regulator of water replacement needs. Therefore, water must be replaced at regular intervals. a.—_Before-work,-drink-two-8-ounce-glasses-of-water.---- ---—- - —--- b. During each rest period drink at Ieast two 8-ounce glasses of water.