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4 <br /> Subcontractor Responsibilities <br /> iAll 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 for <br /> health and safety A copy of their written program must be subnutted 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 by the subcontractor's employees. <br /> HAZARD ANALYSIS <br /> The potential hazards to personnel working 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 include flammability and toxicity. <br /> Toxicity may occur following inhalation of chemical vapors that could potentially be released <br /> from gasoline-affected soil or groundwater, and direct contact with soil and/or groundwater that <br /> . could potentially contain hazardous materials. Direct chemical hazards associated with ARCO <br /> service stations is gasoline. ARCO gasoline is sold in different grades which include Supreme <br /> Unleaded, EC-1 Regular, Leaded Regular, Unleaded, and EC-P Material Safety Data Sheets <br /> (MSDS) for these grades of gasoline are included as Appendix D. The exposure limit for <br /> gasoline is 300 parts per rrullion (ppm) as an 8-hour time-weighted average airborne <br /> concentration. <br /> Gasoline vapors (50-100 octane) are moderately to highly toxic via inhalation. Acute exposures <br /> can cause eye disturbances, central nervous system depression, pneumonitis, or fatal pulmonary <br /> edema (extremely high concentrations such as IDLH). Gasoline vapors also pose a fire and <br /> explosion hazard when present in sufficient concentrations (percent by volume in air). The <br /> flammable range for gasoline vapors in air is approximately 1% - 7%. In addition, gasoline can <br /> react vigorously with oxidizing materials resulting in fire The principal constituents of concern <br /> are benzene, toluene, ethylbenzene and xylene isomers (BTEX compounds) and tetraethyl <br /> (organic) lead. <br /> Benzene is a potential occupational carcinogen and has been associated with leukemia. Acute <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 <br /> The other BTEX compounds (toluene, ethylbenzene, and xylenes) may cause irritation to the <br /> eyes, nose and respiratory system, and dermatitis. Acute exposure can lead to central nervous <br /> system effects including headache, dizziness,confusion,and imtability. Exposure to toluene may <br /> 1V I3194Z_1A 17MSLWORTHARGO <br /> QMS-PS410 <br />