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must be implemented (Appendix D). In addition, air monitoring and personal protective <br /> equipment must also be used to evaluate airborne concentrations and protect workers. <br /> After review of the relevant background information and data, if there is a potential for dermal <br /> and/or respiratory exposure to the materials or contaminants of concern, personnel shall perform <br /> the monitoring requirements summarized in Section 5.2 and execute actions as appropriate. If <br /> action levels are exceeded, work shall be suspended until on-site conditions can be re-assessed <br /> and this HASP modified. <br /> 4.2 Operational/Physical Hazards/Biological Hazards <br /> Potential operational/physical associated with tasks to be performed and the site have been analyzed in <br /> Table 4. If, based on the hazard analysis, these hazards exist; the hazard mitigators described in <br /> Appendix D must be implemented. <br /> • Utility (e.g., Electrical) hazards: Utility hazards include buried cables, which pose a danger of <br /> shock or electrocution if workers or equipment contact or sever them during site operations. <br /> Onsite personnel are advised to pay special attention to the presence of utility hazards. Observe <br /> as built plans (if available) for the presence of underground hazards and advance the borings <br /> cautiously. A subsurface survey shall be conducted at each of the suspect locations, if necessary. <br /> Lockout/Tag out procedures, in accordance with the EarthCon Lockout/Tag out Program, will be <br /> followed when working in the vicinity of electrical equipment. Electrical equipment will be <br /> considered energized unless tested and determined otherwise. Energized parts will be insulated or <br /> guarded from personal contact. Extension cords used with electrical tools will be the 3-wire type <br /> and connected to a ground fault circuit interrupter(GFCI). Wooden or fiberglass ladders will be <br /> used. Metal ladders will not be used in the work area. <br /> • Mechanical hazards: Mechanical hazards include being struck by heavy equipment and being <br /> injured by excavation cave-ins. Onsite personnel are advised to stand at least 15 feet clear of <br /> heavy equipment and excavations, and wear appropriate protective equipment, including steel-toe <br /> boots and hard hats during the field activities. Fall, slip, and/or trip hazards exist when working <br /> with equipment and tools. Field personnel will observe walking surfaces in the work area to <br /> prevent tripping on equipment/tools placed on the ground. Good housekeeping will also be <br /> practiced. All walking surfaces with a drop of more than six feet will have fall protection devices. <br /> Fall protection devices may include adequate delineation of the excavation and trenches, <br /> guardrails, or climbing devices such as a harness and lanyard. <br /> • Noise Hazards: Noise hazards may exist when working around heavy equipment. Loud noises <br /> interfere with communication and also lead to temporary and/or permanent hearing loss. Noise <br /> hazards may exist wherever heavy equipment such as loaders and any operating machinery, <br /> produce noise levels at or above the Action Level of 85 dBA for 8-hr Time Weighted Average <br /> (TWA). Noise in excess of 85 dBA may produce the following effects: <br /> 14 <br />