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