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available specific information. It is expected that inhalation and dermal contact will be <br /> the potential exposure pathways of concern. <br /> Should respiratory irritation occur, appropriate air-purifying respiratory protective <br /> devices will be worn, with organic vapor cartridges and dust pre-filters, or with high <br /> efficiency organic vapor/HEPA stack-type cartridge. Typically, the cartridge will <br /> require replacement daily. r <br /> B. Physical Hazards <br /> Existing utilites 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 minimum distance of 10 feet from power lines will be maintained at <br /> all times. Underground utilities may also be encouhntered during drilling activites. <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 accomplished <br /> using organic vapor detection instruments and/or indicator tubes. <br /> A potential for elevated noise exposure exists when operating or working around heavy <br /> equipment. The use of hearing protection such as ear plugs and/or ear muffs will be <br /> required, as necessary. <br /> Part of the scope of this project involves doing work in the street. In order to facilitate <br /> a safe work environment, lane closure will be necessary. <br /> Lane closure will be performed by Flash Safety. A flashing arrow warning sign will be <br /> placed at least 500 feet before the point where the closure actually begins. Cones or <br /> delineators'will be used to identify and exclude the closed lane from the flow of traffic. <br /> 3103001/SSPDRTLL 5 October 7, 1993 <br /> i <br />