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4 <br /> Subcontractor Responsibilities <br /> All subcontractors are responsible for their own health and safety program and the health and <br /> safety of their own employees. This requirement is based on the Occupational Safety and Health <br /> Administration (OSHA) regulations, which recognize the employer-to-employee responsibility <br /> for health and safety. A copy of their written program must be submitted for review to BC, if <br /> requested. In an effort to assist the subcontractors, and to comply with hazard communication <br /> requirements, Brown and Caldwell will provide a copy of the site safety and health plan for this <br /> project to each subcontractor for implementation for the subcontractor's employees. <br /> HAZARD ANALYSLS <br /> The potential hazards to personnel worldng at the project site have been classified as chemical <br /> hazards, physical safety hazards, noise, and heat stress. Each potential hazard relative to the <br /> potential for exposure is described below. <br /> Chemical Hazards <br /> Health hazards associated with potential chemical exposures at this site include flammability and <br /> toxicity. Toxicity may occur following inhalation of chemical vapors that could potentially be <br /> released from gasoline-affected soil, and direct contact with soil and/or groundwater that could <br /> potentially contain hazardous materials. The exposure limit for gasoline is 300 ppm as an 8-hour <br /> time-weighted average airborne concentration. The principal constituents of concern are <br /> benzene, toluene, ethylbenzene and xylene isomers (BTEX compounds). <br /> Direct chemical hazards associated with E-Z Serve service stations is gasoline. Material Safety <br /> Data Sheets (MSDS) for gasoline compounds are presented in Appendix C. <br /> Gasoline vapors (50 to 100 octane) are moderately to highly toxic via inhalation. Acute <br /> exposures can cause eye disturbances, central nervous system depression, pneumonitis, or fatal <br /> pulmonary edema (extremely high concentrations such as IDLH). The current Threshold Limit <br /> value ('TLV) for gasoline is 300 ppm as an 8-hour time-weighted average airborne <br /> concentration. Gasoline vapors also pose a fire and explosion hazard when present in sufficient <br /> concentrations (percent by volume in air). The flammable range for gasoline vapors in air is <br /> approximately 1 percent to 7 percent. In addition, gasoline can react vigorously with oxidizing <br /> materials resulting in fire. The principal constituents of concern are benzene, toluene, <br /> ethyhbenzene and xylene isomers (BTEX compounds). <br /> I I I II <br /> Benzene is a potential occupational carcinogen and has been associated with leukemia. Acute 1 I l <br /> health,effects include irritation to the eyes, nose and respiratory system, headache, giddiness, <br /> nausea, and anorexia. Benzene exposure can also lead to disturbances in gait, dermatitis, and ' ! <br /> . bone marrow depression., I i l ; p I <br /> F S <br /> Ik I I I I I I 'I II <br /> I I1 ! <br /> I I <br /> E OA201N41F� R115 .ZWplI � <br /> [1 4 bi' VII I I V I I I ill I 1 !V 1i E ' 11Y <br /> VII VU I 1 ; I l iI II E <br /> I <br />