© Chevron 2006 © Chevron Rev. Aug Portable Electric Grinder Safety Manufacturing Standard GR

© Chevron 2006 © Chevron Rev. Aug Overview Purpose The purpose of this Mfg Standard is to protect personnel by specifying the requirements for portable grinders within the refinery Objectives This document is intended to highlight the safety precautions required for using portable electric grinders within the refinery. These precautions are to work in conjunction with industry standards, manufacturing standards, and established risk mitigation practices. The more stringent to apply. Scope This standard applies to employees and contractors alike whose work involves the use of portable electric grinders within the refinery. 2

© Chevron 2006 © Chevron Rev. Aug Portable grinders are one of the most potentially dangerous tools on any worksite. The majority of injuries associated with portable grinder use are foreign bodies in the eyes and lacerations to the body. These injuries typically result from one or more of the following items: 1.Improper selection of tools 2.Improper use or operation of the grinder 3.Failure to utilize the correct personal protective equipment 4. Improper abrasive/ grinding wheel selection 5.Incorrect body positioning and/or improperly inspected and maintained equipment Procedures, Standards, and Guidelines

© Chevron 2006 © Chevron Rev. Aug Lock-off switch to prevent accidental starting of the portable grinder. The main operating trigger will automatically return to the OFF position when released. An unlocking action is required to start. The paddle switch shall not take up the length of grinder so that a good grip can be maintained when the start switch is released. 2.No lock-on switch to prevent the user from locking the grinder in the run position. Lock-on switches are not allowed. 3.Anti-kickback Clutch will disengage the rotating wheel from the motor when the wheel is pinched or a stall is detected. This reduces kick- back significantly. 4.Tool free adjustable guard protects from debris. 5.Quick disk change allows for tool free disk change of worn out disk. 6.Adjustable side handle allows for stability control of the grinder for right or left-handed users. Required Safety Features for Portable Grinders

© Chevron 2006 © Chevron Rev. Aug A brake that allows for the rotating disk to stop rotating quickly once the trigger is released. 2.A soft start allows the disk to slowly ramp up preventing the jerk upon start up. 3.Vibration reducing features to improve ergonomics. Grinder approval process 1.Chevron procurement will ensure that suppliers provide only those grinders that meet these requirements. 2.Contractors will ensure their employees use only approved grinders. 3.Chevron maintenance supervisors and projects reps are responsible for ensuring that only approved grinders are used on their jobs. PPE Requirements 1.Standard PPE 2.A hard hat w/impact resistant face shield or welding hood will be worn whenever grinding. 3.Goggles or equivalent sealed eyewear will be w orn under the face shield. Desired but not required

© Chevron 2006 © Chevron Rev. Aug As a rule grinders should not be used as a cutoff tool. A powered saw, chop saw, or another approved cutting tool is preferable. An exception form is required to use a grinder as a cut off tool 2.Always follow manufacturers instructions. 3.Always unplug grinder before changing disk or making adjustments. 4.Always replace worn wheels in accordance with mfg. instructions. Make sure the wheel is rated for the grinders speed, size, and service. 5.Never wear an abrasive wheel down to its backing flange/plate. 6.Wheels that are cracked, dropped, not marked with a speed rating, wet or contaminated with material shall not be used. 7.Never use your foot, hand, or any part of your body to secure the object while in the process of grinding. 8.To prevent kickback don’t bump the grinder onto the work surface or let the abrasive wheel contact adjacent surfaces while grinding. 9.Guards shall never be removed to accommodate larger disks. 10.Do not lay the grinder down while the abrasive wheel is still rotating. Safe Operation

© Chevron 2006 © Chevron Rev. Aug A daily portable grinder visual inspection shall be completed prior to each use and periodically during extended use. Wheels shall be closely inspected and sounded. Abrasive Wheel 1.Rated for grinder speed (RPM). 2.Free of physical damage and imperfections. 3.Not wet or contaminated. Guard - Attached to grinder while in use. Body of Tool 1.Free of physical damage. 2.Power cord is free of nicks, cuts or abrasions. 3.Grab handle is attached and secure. Portable Grinder Safety Awareness Training Requirements 1.All Chevron and contract personnel who use portable grinders are required to take Grinder Safety Awareness Training. 2.Chevron personnel will receive the portable grinder safety training as part of their normal craft training. In addition, a CBT refresher will be required every two years. 3.Contractors are responsible for ensuring their employees are properly trained and qualified in using portable grinders. They shall be able to show proof upon request that employees have been trained. Daily Portable Grinder Visual Inspection

© Chevron 2006 © Chevron Rev. Aug  Audits and Review Maintenance Team Leaders and Chevron Contractor representatives are responsible for auditing adherence to this standard.  Exceptions Exceptions to any part of this standard shall be issued and approved prior to work commencing. The Chevron Maintenance Team Leader or Company Representative shall approve exceptions to this standard. Portable Grinder Safety Awareness Training Requirements

© Chevron 2006 The following table outlines the roles and responsibilities associated with this process. RoleResponsibilities Chevron Maintenance Team Leader or Project Supervisor Ensure the requirements of this standard are followed by performing frequent audits. Approve any exceptions to this standard and ensure mitigation steps are in place to prevent injury. Contractor site leadership Ensure the requirements of this standard are understood and followed. Ensure workers are trained on grinding and provide documentation that your company certifies each employee is capable of performing grinding work safely. Roles and Responsibilities

© Chevron 2006 RoleResponsibilities Contractor site leadershipEnsure workers are trained in the requirements of this standard. When required, issue exceptions to this standard with appropriate mitigation steps to ensure the job can be performed safely. Mechanic (Chevron or Contract)Complete awareness training and fully understand the requirements of this standard. Follow safe operating guidelines in this standard to ensure Incident and Injury Free work. Roles and Responsibilities

© Chevron 2006 RolesResponsibilities Mechanic (Chevron or Contract) Perform daily inspections of the grinder per the requirements of this standard. Review and follow the manufacturer’s documentation. ProcurementEnsure suppliers of portable grinders are aware of our requirements. Ensure contractors understand our requirements for portable grinders. Maintenance Training Department Incorporate Grinder Safety Awareness standard into the Formal Maintenance Training Program. Ensure successful training. Roles and Responsibilities

© Chevron 2006 Proposed Exception _____________________________________ _______________________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________________ ___________________ Risk Mitigation ________________________________________ _______________________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________________ ___________________ Mechanics Assigned to use Portable Grinders with this Exception : Print Name Date Print Name Date Print Name Date Approved: Yes No Chevron Maintenance Team Leader or Company Representative: Name: Name Date: Portable Grinder Exception Form This form shall be used to gain approval for any exception to GR-150, Portable Grinder Safety standard. Appropriate description of the proposed exception along with risk mitigation shall be clearly defined below. Any employee who is involved with this exception shall read and sign this form stating they fully understand the exception and risk mitigation steps. Company Name: __________________Date____________________________ Supervisor: ________________________Date: _______________________

© Chevron 2006