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Equipment Decontamination Standard Operating Procedure SWE-FSOP-801;Revision 1 Ahtna Southwest Environmental Operations 1.0 Introduction 1.1 Purpose The purpose of this standard operating procedure (SOP) is to direct field staff in the proper techniques and documentation requirements to decontaminate field equipment and personal protective equipment (PPE). Decontamination is necessary to prevent sample cross-contamination, exposure to contaminants, and unintended contaminant transport. Equipment is decontaminated so that environmental contaminants are not transported offsite or across boundries defining a contaminant mass. Equipment that comes into contact with contaminants are decontaminated to minimize cross-contamination of multi-media samples. These samples are packaged and submitted for laboratory tests,where,in most instances,the laboratory performs sub-part per million tests; thus, care must be taken to minimize cross-contamination of the collected sample. 1.2 Scope The scope of this SOP applies to field staff working with sampling equipment that comes into contact with environmental contaminants. The SOP also address activities that use industrial equipment such as drill rigs and tools and activities that use larger equipment such as trucks, loaders, excavators, and others. Decontamination procedures described here are applicable to fieldwork involving modified Level D PPE (steel-toed boots, hard hat, safety glasses, and disposable nitrile gloves) where contact with hazardous substances is limited. When required by the project, use the PFAS-free equipment, materials, and procedures recommended in this SOP which are indicated by [PFAS Project]. 1.3 Responsibilities Field Team. A Field Team is one or more individuals working together. The Field Team is responsible for the oversight of and/or collection of groundwater samples as specified in this SOP. Field Team Lead (FTL). The FTL is responsible for reviewing project work plans to understand the health and safety needs, procedural specifications,and field documentation requirements.The FTL is responsible for reviewing and confirming the adequacy of the fieldwork documentation. Project Lead (PL). The PL is responsible for providing adequate resources to the field staff and ensuring the Field Team has adequate experience and training to comply with the SOP successfully. The PL is responsible for approving and documenting techniques not described in this SOP but are considered the best methods for the current project. Safety Representative. The Safety Representative meets the experience and training requirements of USACE EM-385-1-1 (USACE, 2014). The Safety Representative oversees site-specific health and safety activities and ensures compliance with the project requirements. The Safety Representative notifies the PL of safety deficiencies and incidents and actions to correct those. The PL approves those actions or notifies the Site Safety and Health Officer for their approval if the circumstance warrants involvement. Page 4 of 10