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• Conduct site evaluation to determine proper positioning for the unit. Make sure surface is level. Cordon off holes,drop-offs,bumps or weak ground surfaces. • When using a crane, do not use hands when the load is being lifted or lowered. Use non-conductive tag line to help direct and position the load. • Never climb a raised platform or stand on the mid-rail or top-rail. • Tools should always be hung or put into a belt whenever possible 5.1.10 Excavation and Trenching Observe CB&I Procedure CMS-710-02-PR-01600. In addition, observe the following Excavation and Trenching practices and procedures: • Ensure a competent person is assigned. Before any excavation can be started, an Excavation Permit (CMS-710-02-FM-01601)(Appendix A) must be completed by the responsible Superintendent with input from the Authorized Person for underground testing (utility identification) and the Excavation Competent Person. Appropriate Client approval is also necessary where required by Client regulations. Client and/or utility company representatives shall be notified 24 hours prior to beginning excavations. • Check for utilities(see Underground Utility Line Contact,Appendix A). • Have a Professional Engineer(PE)evaluate all excavations deeper than 20 feet. • Excavations shall be inspected by a Competent Person and the results recorded on CMS-710-02- FM-01602 (Appendix A): o Prior to entry o After rain or snowfall o After freezing and/or thawing temperatures occur o After any condition that can change the integrity of the soil • Use protective systems(sloping, shoring, shielding)for entry in trenches over five feet deep. • Provide for rescue for cave-ins. • Place spoils a minimum of three feet from edge. • Monitor excavations over four feet deep for hazardous atmospheres and LEL/oxygen. • Place ladders within 25 feet of lateral travel if the excavation is over four feet deep. • Place barriers around excavations near pedestrian access. • Follow work zone security procedures of Section 6.1. 5.1.11 Leak Testing Hazards • Before attempting to repair leaks on any vessel including pipe: • The responsible employee on the work site and employees making repairs must fully satisfy themselves and all agree that the pipe or vessel is not under positive pressure. • Do not trust pressure gauge readings. Open all available valves to relieve test pressure. 5-5