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0 0 <br /> • Toluene <br /> This material is a flammable, colorless liquid, with a benzol-like odor The <br /> flash point is listed at 40 degrees Fahrenheit The currently established TLV is <br /> 100 ppm in air <br /> Ethylbenzene <br /> Ethylbenzene is a flammable, colorless liquid with an aromatic odor The flash <br /> point is 59 degrees Fahrenheit, and the currently established TLV is 100 ppm <br /> in air <br /> Xylene Compounds <br /> These materials are clear liquids with a flash point of 100 degrees Fahrenheit <br /> The TLV is currently established at 100 ppm in air Xylene compounds are <br /> currently under study as possible carcinogens <br /> It is not anticipated that the potential levels of exposure will reach personal <br /> exposure limit (PEL) or threshold limit value (TLV) limits, but this is based <br /> solely on limited available specific information It is expected that inhalation <br /> and dermal contact will be the potential exposure pathways of concern <br /> . Should respiratory irritation occur, appropriate air-punfying respiratory <br /> protective devices will be worn, with organic vapor cartridges and dust pre- <br /> filters, or with high efficiency organic vapor/HEPA stack-type cartridge <br /> Typically, the cartridge will require replacement daily <br /> B PHYSICAL HAZARDS <br /> Existing utilities on the site must be avoided in the process of normal site work <br /> Overhead power lines which may be located throughout the site present a potential for <br /> electrical contact All overhead lines located in the work area will be noted prior to <br /> starting work A mirumum distance of 10 feet from power lines will be maintained at <br /> all times Underground utilities may also be encountered during drilling activities <br /> Efforts will be made to locate such utilities, and to prevent contact during the drilling <br /> There is a small risk of hazards based upon the Lower Explosive Limit (LEL) of the <br /> specific compounds encountered on the project site As the majority of the petroleum <br /> fuel hydrocarbon materials have low flash points, it is important to measure the <br /> presence of the concentrations or amounts of vapor present This will be <br /> accomplished using organic vapor detection instruments and/or indicator tubes <br /> 3201591A/SSP DOC 4 November 9, 1995 <br />