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Soil Sampling Field Standard Operating Procedure SWE-FSOP-405;Revision 1 Ahtna Southwest Environmental Operations 3.1 Manual (Hand) Sampling • Trowel, shovel, pickax, mattock, or other excavating tools • Hand auger with extension rods, as necessary • Toolkit 3.2 Split Spoon or Shelby Tube Sampling • Drill rig equipped with hollow stem augers and a drop hammer • Split spoon or Shelby tube samplers (at least two) • Split spoon liners, as necessary • Sampling tube basket or spring retainers for loose soil • Toolkit 3.3 Continuous Sampling • Drill rig equipped with direct-push capabilities and pushrods or core barrel assembly that advances in front of the auger cutting head • Enough drill rod liners for the planned number of sampling intervals • Hook-blade utility knife to cut the liners (drillers may have a cutter on the rig) • Basket retainers and caps for the liner ends for loose soil • Toolkit • Boring log forms 4.0 Procedures Procedures are provided for: • Pre-Field Tasks (Section 4.1) • Retrieval Techniques (Section 4.2) • Sample Collection (Section 4.3) 4.1 Pre-Field Tasks Before sample collection, follow these general steps: • Inspect the area to confirm work can be performed safely and there are no potential sources of field contamination (e.g., debris, wind-blown dust, etc.) • Decontaminate all non-disposal sampling equipment according to SWE-FSOP-801 (Equipment Decontamination). [PFAS Project]: Dedicated or disposable equipment should be rinsed with certified PFAS-free water. If another source of water is used, collect a water sample and run laboratory tests for PFAS before using that source. • Confirm that any disposable sampling equipment is clean and stored correctly before use. • Don the appropriate PPE, as specified in the SSHP. • Determine the sample collection locations based on the project goals and work plan specifications. Page 8 of 15