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`. <br />Potential chemical, physical and general safety hazards during the excavation / soil sampling <br />program at the site include the following: <br />Chemical hazards <br />Respiratory (exposure to volatile organic compounds VOCs) <br />Dermal (contact with petroleum products) <br />Physical hazards <br />- Excavation instability <br />- Noise <br />- Electric shock <br />- Heavy equipment <br />- Auto traffic <br />- Fire and explosion <br />Work procedures to protect workers from chemical and physical hazards are discussed <br />in Section 6.0. <br />5.1 Chemical Hazards <br />The primary chemical hazard is exposure to chemical compounds from the unleaded <br />gasoline affected soil. CSF particular concern is the potential for workers to be exposed to <br />aromatic petroleum compounds in the vicinity of the tank excavation. These <br />hydrocarbons include the primary components of gasoline (the light aliphatic <br />hydrocarbons) and the common minor components of gasoline (benzene toluene ethyl <br />benzene, and xylenes). <br />5.1.1 Chemical Description of Gasoline <br />Gasoline is produces from the light distillates during petroleum fractionation; <br />its major components include paraffin's, olefins, naphtenens, aromatic, and <br />recently ethanol. Gasoline also contains various functional additives as <br />required for different uses, such as antiknock fluids, antioxidants, metal <br />deactivators, corrosion inhibitors, anti -icing agents, preiginition <br />preventers, upper cylinder lubricants, dyes, and decolorizers. <br />5.1.2 Effects of Exposure to Gasoline <br />