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Workers on foot should not wander into the active roadways. If work in active traffic areas <br /> is required, workers will wear bright orange safety vests, and the work zone will be marked <br /> with barricades, cones or tape to wam traffic. <br /> 4.2.3 Chemical Hazards <br /> During drilling and sampling activities, all personnel will wear appropriate protective clothing <br /> whenever the possibility for contact with contaminated soil (see Chapter 5.0). <br /> 4.2.4 Drilling Safety <br /> Where drill rigs and other equipment must be placed below overhead power lines, the utility <br />' company should be contacted in order to alter the current flow so that it immediately shuts <br /> off on contact as opposed to pulsing. Equipment should be oriented to minimize the potential <br /> for contact with the lines. Drillrigs must maintain at least a 20-foot clearance from the <br />' overhead lines at all times. While the rig is being positioned and readied for use, the operator <br /> must be completely within the operator's area and no one else shall be permitted to touch the <br />' rig until it has been secured. Any vehicles bearing drill rigs or stationary equipment should <br /> have the wheels chocked and the parking brake set to prevent accidental movement. <br /> Prior to the start of work the drilling subcontractor will inspect all drilling equipment in the <br /> presence of the FC. The inspection will be documented in the field records. If field <br /> operations last longer than one week, the drilling equipment inspection must be repeated on a <br />' weekly basis. <br /> The location of all underground utilities must be ascertained and confirmed prior to the start <br />' of drilling operations. In addition to obtaining the utility locations from the client, local <br /> utilities, or Underground Services Alert (USA), the FT Geophysics group or a qualified <br /> subcontractor, will make a utility survey of each drilling point. The utility survey shall <br /> include a magnetometer survey. Documentation that nearby utilities have been marked on the <br />' ground, and that the drill site has been cleared shall be.in the possession of the Project FC (or <br /> their qualified designee) prior to commencement of the intrusive investigation at that point of <br />' the site. <br /> All operations involving the use of powered drilling rigs will follow generally accepted <br /> idrilling practices. One person will be assigned the responsibility of Lead Driller. Additional <br /> M 05.09-94MST/944M4 4-3 <br />