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L. <br /> distance of 10 feet from power lines will be maintained at all times. Underground utilities may <br /> also be encountered during excavation activities. Efforts will be made to locate such utilities, <br /> and to prevent contact during excavation. <br /> There is a small risk of hazards based upon the Lower Explosive Limit (LEL) of the specific <br /> compounds encountered on the project site. As the majority of the petroleum fuel <br /> hydrocarbon materials have low flash points, it is important to measure the presence of the <br /> concentrations or amounts of vapor present. This will be accomplished using organic vapor <br /> 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 required, <br /> as necessary. <br /> Additionally there is a potential for physical hazards resulting from falling objects such as <br /> tools or equipment, from falls from elevations, or from tripping over pipes, tools hoses, and <br /> other equipment laying on the ground. Improper use and/or maintenance of equipment and <br /> tools is another potential source of physical hazards on site. These sorts of physical hazards <br /> must be avoided through proper site management and control of the work area by the Project <br /> Safety Officer. <br /> 4.0 RISK ASSESSMENT SUMMARY <br /> It is anticipated that there will be no significant or major potential source of exposures due to <br /> the scope of work to be followed on this project. The potential of any increased risk of <br /> exposure on other workers or the surrounding community is minimal. The basic potential <br /> exposure would probably originate from airborne dusts, during the drilling of the monitoring <br /> wells, and those dusts containing low level concentrations of VOC materials in the soils. <br /> Due to this potential, the Contractor will have equipment on-site to provide for dust control <br /> during excavation activities, if it appears that dust control is warranted. Also, perimeter air <br /> monitoring, to detect potentially migrating contaminants, may be conducted to ensure no <br /> hazardous materials are migrating to the surrounding community. <br /> 3100971B/SSP2.DOC 5 April 12, 1996 <br />