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Replace all caps, filler plugs, protective guards or panels, and high pressure hose clamps, chains or cables that have been removed for maintenance before returning the drill rig to service. 2.5.7 Safe Use Of Hand Tools There are almost an infinite number of hand tools that can be used on or around a drill rig and in repair shops. "Use the tool for its intended purpose" is the most important rule of proper use. The following are a few specific and some general suggestions that apply to safe use of several hand tools often used on and around drill rigs: • Wear safety glasses and require all others around you to wear safety glasses when using a hammer. • Wear safety glasses and require all others around you to wear safety glasses when using a chisel. • Keep all tools cleaned and orderly stored when not in use. • Use wrenches on nuts - don't use pliers on nuts. • Use screwdrivers with blades that fit the screw slot. • When using a wrench on a tight nut - first use some penetrating oil, use the largest wrench available that fits the nut, when possible pull on the wrench handle rather than pushing, and when possible apply force to the wrench with both hands while both feet are firmly placed. • Don't push or pull with one or both feet on the drill rig or the side of a mud pit or some other blocking-off device. Always assume that you may lose your footing - check the place where you may fall £or sharp objects. • Keep all pipe wrenches clean and in good repair. The jaws of pipe wrenches should be wire brushed frequently to prevent an accumulation of dirt and grease that would otherwise build up and cause wrenches to slip. • Never use pipe wrenches in place of a rod holding device. • Replace hook and heel jaws when they became visibly worn. • Position your hands so that your fingers will not be smashed between the wrench handle and the ground or the platform when breaking tool joints on the ground or on the drilling platform; the wrench may slip or the joint may suddenly let go. 2.5.8 Clearing the Work Area Prior to drilling, adequate site clearing and leveling should be performed to provide a safe working area for the drill rig and supplies. Drilling should not be commenced when tree limbs, unstable ground, or site obstructions cause unsafe tool handling conditions. 2.5-5