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Soil Sampling Field Standard Operating Procedure SWE-FSOP-405;Revision 1 Ahtna Southwest Environmental Operations 1.0 Introduction 1.1 Purpose The purpose of this standard operating procedure (SOP) is to provide field personnel with the techniques and requirements for the collection of surface and subsurface soil samples.These samples are then submitted for laboratory tests that may include trace analyses of analytes.Therefore, it is essential that care is taken to collect samples that are representative of the site surface and subsurface soil and minimize cross-contamination of the collected sample. 1.2 Scope The SOP includes guidance for the performance, management, and completion of surface and subsurface soil sampling activities, including a description of staff responsibilities, relevant documentation, equipment, procedures, and quality control. Surface and subsurface soil sampling are generally conducted by field personnel or drilling subcontractors on most projects and include the collection of disturbed and undisturbed samples manually and from stockpiles, excavation walls and floors, and drilling cores. Potential hazards related to drilling are addressed in project-specific Accident Prevention Plans and Site Safety and Health Plans. Per- and polyfluoroalkyl substances (PFAS) friendly procedures are also provided in this SOP. 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 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. Field Geologist.A Field Geologist is responsible for overseeing drilling activities according to project specifications.The Field Geologist is a registered geologist or a person performing work under the supervision of a registered geologist. Project Geologist.The registered Project Geologist is responsible for oversight of the drilling subcontractor, logging geologic materials per SWE-FSOP-201, "Soil Classification," and field documentation. When a Field Geologist performs the oversight, the Project Geologist is responsible for fieldwork variances/deficiencies, completeness and accuracy of field documentation, and approval of the boring logs. 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 the current version of U.S.Army Corps of Engineers EM-385-1-1 Safety and Health Requirements.The Safety Representative oversees site-specific health and safety activities and ensures compliance with the Page 4 of 15