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A=COM 4.13.4 Cylinder contents shall be identified by a decal, label,tag, or stenciling. If an identifying label is lacking or not legible, return the container to the supplier, unused. 4.14 Air Monitoring Requirements 4.14.1 Air monitoring requirements are dependent upon the specific substances contained within the cylinders and will be specified within the site-specific safety plan prepared prior to commencement of field activities.Air monitoring parameters, refer to S3AM-127-PR1 Exposure Monitoring, may include, but are not limited to: • Explosivity(i.e., lower explosive limit[LEL]), and • Chemical-specific substance(e.g., chlorine, ammonia, arsine, etc.). 4.14.2 Action levels will be identified in the site-specific safety plan. 4.15 Cylinder Staging 4.15.1 Staging involves the organization, and sometimes consolidation, of cylinders that have similar contents or characteristics. 4.15.2 The staging of cylinders will occur in a remote location at the site in order to minimize the potential injury or property damage from an accidental release or emergency decompression (if the integrity of the cylinder is in question, it should not be moved). 4.15.3 Safe distances will be based on the evacuation distances provided in DOT'S Emergency Response Guidebook(most current edition). 4.15.4 When multiple cylinders containing different substances are present,the distance should be based on the greatest evacuation distance required by the substances present. 4.16 Cylinder Disposition &Decommissioning Activities 4.16.1 Disposition refers to the recycling,treatment, or disposal of a compressed gas cylinder and/or its contents. 4.16.2 Recovery and recycling of materials are preferred over any other method of disposition. Cylinder disposition activities shall be approved by the SH&E Manager. 4.16.3 An effort should be made to recover and recycle the contents of a cylinder; however, if recovering or recycling the contents is not possible,then other options include: • Venting to the Atmosphere, • Flaring, • Neutralization, and • Detonation. 4.16.4 Under no circumstances will poisonous, toxic, or ozone-depleting substances be vented to the atmosphere. Only cylinders containing flammable gases should be detonated, as the flammable contents will be consumed in the subsequent explosion. 4.16.5 If the cylinder valve has been determined to be inoperable,then the available options for disposition are limited to having an outside vendor perform the remote opening and sampling of the cylinder, or detonation of the cylinder where the cylinder contents are consumed in the subsequent explosion (flammable gases only). 4.16.6 All cylinders shall be inventoried, staged, and inspected. 4.16.7 Prior to the commencement of cylinder disposition and decommissioning activities, local emergency response agencies(i.e., Fire Department, Medical, and Emergency Response, if separate)shall be confirmed and, as applicable, activities coordinated with the local agencies. 4.16.8 Air monitoring is mandatory during cylinder disposition and decommissioning operations. Compressed Gases(S3AM-114-PR1) Revision 3 September 30,2020 PRINTED COPIES ARE UNCONTROLLED. CONTROLLED COPY IS AVAILABLE ON COMPANY INTRANET. 9 of 12