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Ethylbenzene Ethylbenzene is a flammable, colorless liquid with an aromatic odor. The flash point is 59 degrees Fahrenheit, and the currently established TLV is 100 ppm in air. Xylene Compounds - These materials are clear liquids with a flash point of 100 degrees Fahrenheit. The TLV is currently established at 100 ppm in air. Xylene compounds are currently under study as possible carcinogens. Organic Lead(Tetraethyllead) A poison, and a solvent for fatty materials. Tetraethyllead was used as a gasoline additive to prevent knocking in motors (leaded gasoline contains 1.1 grams of lead per gallon). It is a colorless liquid, with a flash point of 2000F. The currently established PEL is 0.075 mg/m3 (approximately 60 parts per billion [ppb]) in air. It is insoluble in water, but soluble in benzene. i It is not anticipated that the potential levels of exposure will reach personal exposure limit (PEL) or threshold limit value (TLV) limits, but this is based solely on limited available specific information. It is expected that inhalation and dermal contact will be the potential exposure pathways of concern. Should respiratory irritation occur, appropriate air-purifying respiratory protective devices will be worn, with organic vapor cartridges and dust pre-filters, or with high efficiency i organic vapor/HEPA stack-type cartridge. Typically, the cartridge will require replacement daily. I B. Physical Hazards Existing utilities on the site must be avoided in the process of normal site work. Overhead power lines which may be located throughout the site present a potential for electrical contact. All overhead lines located in the work area will be noted prior to starting work. A minimum distance of 10 feet from power lines will be maintained at all times. Underground I . � I 920-078.1A/SSP.DOC 4 September 24, 1996