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SAFE WORK PRACTICES FOR CONTRACTORS WORKING AT RETAIL PETROLEUM/CONVENIENCE FACILITIES 13 4.2.2 Do Not Defeat Safety Features of Tools Workers are prohibited from removing guards,switches,grounding conductors,or other safety features,even temporarily.If pro- tective features or switches do not work properly,remove the equipment from service immediately. 4.3 HAND, PNEUMATIC (AIR), AND POWER TOOL SAFETY FEATURES 4.3.1 BladelWheel Guards • All portable circular saws shall be equipped with a working spring-loaded blade guard that extends both above and below the base plate of the saw and automatically and immediately returns into place when the saw is withdrawn from the work. • All grinding wheels larger than 2 inches in diameter shall be used on machines with safety guards designed and maintained to meet OSHA requirements. 4.3.2 Pressure Switches • All hand-held powered circular saws, electric, hydraulic or pneumatic chain saws, and percussion tools without positive accessory holding means shall be equipped with a constant pressure switch or control that will shut off the power when the pressure is released. • All hand-held powered drills,fastener drivers,horizontal,vertical,and angle grinders,disc sanders,belt sanders,reciprocat- ing saws,saber,scroll,and jig saws,and other similarly operating powered tools shall be equipped with a constant pressure switch or control,and may have a lock-on control provided that turnoff can be accomplished by a single motion of the same finger or fingers that tum it on. 4.3.3 Air Hose Connections Pneumatic power tools shall be secured to the air supply hose by some positive(locking)means to prevent the tool from becom- ing accidentally disconnected.This can be accomplished with a sliding sleeve type of connector or by using retainer clips that are locked in place with the appropriate fastener.Where air supply hoses are used as extensions hoses,they shall be fastened together in the same manner. 4.4 SAFETY REQUIREMENTS FOR SURROUNDING AREAS WHEN HAND, PNEUMATIC, AND POWER TOOLS ARE USED Portable electrical equipment,including battery-operated equipment,may be capable of igniting flammable vapors.Workers shall use hot work safety guidelines whenever using portable electrical equipment near a potential source of flammable vapors,such as a sump or a dispenser.For more information see Hot Work(Section 13)and Confined Space Safe Work Practice(Section 11). 4.5 TRAINING REQUIREMENTS FOR HAND, PNEUMATIC,AND POWER TOOLS Employers are required by OSHA to instruct each employee in the recognition and avoidance of unsafe conditions and the regula- tions applicable to his work environment and necessary to control or eliminate any hazards or other exposure to illness or injury. This includes the requirement to assure that workers have the knowledge or receive proper training for the tools they use. 4.6 VISIBLE WEAR OR DAMAGE TO HAND, PNEUMATIC, AND POWER TOOLS THAT MAKE MAINTENANCE OR REPLACEMENT NECESSARY Before use,all tools shall be inspected for damage and wear that may require maintenance or replacement: • Check all extension and attachment cords for exposed wiring, insulation cracks,or defects. Worn or damaged electrical- cord insulation may expose an energized wire and create a shock hazard. • Ensure that the conducting pins are in good condition.Do not use the equipment if the grounding pin is not in place. • Visibly inspect all equipment for external damage or defects such as: i. damage to housing ii, missing or loose parts iii. evidence of internal damage • Verify that the guards and/or other safety features are in place and work properly. • Make sure rotating parts are free and rotate without obstruction.