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48 AN RECOMMENDED PRACTICE 1646 APPENDIX A.4—Hot Work—Section 13 A.4 Additional Requirements A.4.1 EMPLOYEE TRAINING Employees shall be trained so they know the relevant aspects of safety regarding Hot Work.Training should include: • Types and locations of potential fire hazards at the facility and specifically near the work area. • Work practices and techniques to control hot work exposures. • Atmospheric testing procedures. • Use of fire extinguishers,atmosphere monitoring equipment,and ventilation equipment. • Relevant Hot Work policies. Employees shall be trained prior to conducting their first Hot Work task,when assigned duties change,or when the employee's supervisor believes it to be appropriate. A.4.2 DUTIES OF THE FIRE WATCH • Understanding the location and nature of the hot work. • Remain in the area while the work is being performed and remain in constant communication range with person(s)doing the Hot Work. • Never leave the work area for any reason without a replacement. • When walls are involved in Hot Work,each side requires a fire watch. • The fire watch shall be in the ready position at all times when Hot Work is being performed.The ready position consists of being attentive and having the fire extinguisher in position prior to the start of work.The fire extinguisher shall be nearby while the Hot Work is being performed.The fire extinguisher shall be returned to its designated location when the Hot Work is complete.The fire extinguisher shall not be discharged unless a fire actually occurs. • The fire watch shall periodically survey the area with a direct-reading combustible gas meter to ensure the work area is suit- able for Hot Work. The work shall stop immediately if the combustible gas meter registers 10%or greater of the lower explosive level(L.E.L.)in the atmosphere. • The fire watch is authorized to stop the Hot Work whenever work conditions become unsafe or if the work description on the permit is exceeded.The supervisor shall be notified for any"stop work"situation. • The fire watch shall be equipped with the personal protective equipment needed to perform the work safely,such as prop- erly shaded goggles for working with welders. A.4.3 GAS TEST HOT WORK AREAS—COMPLETE HOT WORK PERMIT Before beginning the Hot Work permit process,the permit writer shall discuss the work with the site manager to assure that the operators of the site are aware of the work to be done. Atmospheric testing shall be performed as part of any Hot Work task. Workers performing gas testing shall check and calibrate their LEL monitoring equipment as necessary according to manufacturer's instructions.Calibration shall be documented properly and maintained as per the equipment manufacturer's and/or the contractor's procedures. For all Hot Work,the atmosphere shall be tested initially and periodically as conditions require.A Hot Work permit shall be com- pleted for any Hot Work to be conducted within 35 feet of flammable material.For any Hot Work conducted: • LEL shall never exceed 10%. • 1f LEL is greater than 10%Hot Work may not proceed,or if ongoing,shall be shut down immediately. The Permit Writer will complete the Hot Work Permit and review all permit conditions with any additional personnel performing the Hot Work. Any special conditions shall be noted on the permit and discussed with affected personnel. Personnel shall be informed that it is their responsibility to discontinue Hot Work immediately if an unsafe condition develops or may develop,and report to the permit writer.The permit shall be posted in a prominent location before beginning Hot Work.