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with the oil may produce skin irritation as a result of defatting. Protective measures,such as the wearing of chemically resistant gloves,to minimize contact are addressed elsewhere in this plan. Because of the relatively low vapor pressures associated with PHCs,an inhalation hazard in the outdoor environment is not likely. ❑ Polychlorinated Biphenyls (PCBs). Prolonged skin contact with PCBs may cause the formation of comedones, sebaceous cysts, and/or pustules(a condition known as chloracne). PCBs are considered to be suspect carcinogens and may also cause reproductive damage. The OSHA PELs for PCBs are as follows: Compound PEL(8-hour TWA) Chlorodiphenyl(42%Chlorine) 1 mg/m3-Skin Chlorodiphenyl(54%Chlorine) 0.5 mg/m3-Skin It should be noted that PCBs have extremely low vapor pressures(0.001 millimeters of mercury(mm Hg)at 42%Chlorine and 0.00008 mm Hg at 54%Chlorine). This makes it unlikely that any significant vapor concentration (i.e., exposures above the OSHA PEL)will be created in the ambient environment. This minimizes the potential for any health hazards to arise due to inhalation unless the source is heated or generates an airborne mist. If generated,vapor or mists above the PEL may cause irritation of the eyes,nose,and throat. The exposure limits noted above are considered low enough to prevent systemic effects,but it is not known if these levels will prevent local effects. It should also be noted that both PELs carry the Skin notation,indicating that these compounds adversely affect or penetrate the skin. OSHA specifies that skin exposure to substances carrying this designation be prevented or reduced through the use of the appropriate PPE. ® Polycyclic Aromatic Hydrocarbons (PAHs). Due to the relatively low vapor pressure of PAH compounds, vapor hazards at ambient temperatures are not expected to occur. However, if site conditions are dry, the generation of contaminated dusts may pose a potential inhalation hazard. Therefore,dust levels should be controlled with wetting,if necessary. Repeated contact with certain PAH compounds has been associated with the development of skin cancer. Contact of PAH compounds with the skin may cause photosensitization of the skin, producing skin burns after subsequent exposure to ultraviolet radiation. Protective measures,such as the wearing of chemically resistant gloves, are appropriate when handling PAH-contaminated materials. ❑ Tetraethyl and Tetramethyl Lead. Both compounds are used as anti-knock ingredients in gasoline. The inhalation of tetraethyl lead dusts may result in irritation of the respiratory tract. This dust,when in contact with moist skin or eye membranes,may cause itching,burning,and transient redness. The direct absorption of a sufficient quantity of tetraethyl lead,whether briefly at a high rate,or for prolonged periods at a low rate,may cause acute intoxication of the central nervous system. Mild degrees of intoxication may cause headache,anxiety,insomnia,nervous excitation,and minor gastrointestinal disturbances. ® Volatile Organic Compounds(VOCs). See BTEX compounds and Chlorinated Organic Compounds. ❑ Waste Oil. See Petroleum Hydrocarbons(PHCs)and Cutting Oil. Partner Site-Specific Health and Safety Plan Page 13 Version 2.0 July 6,2021