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Soil Sampling Field Standard Operating Procedure SWE-FSOP-405;Revision 1 Ahtna Southwest Environmental Operations 4.2.5 Direct-Push Soil Retrieval Subsurface soil samples may be collected from a dual-tube sampler or a single rod sampler when using a direct-push drill rig or sonic drill rig, or a Shelby tube sampler when using a hollow stem auger drill rig. Plastic liners may be used to allow for soil removal from the sampler. For sampling from these devices,follow these general steps: 1. Ensure that the drill rig and all tooling are decontaminated before drilling. 2. Drill to the first sample depth. 3. When the sample depth is reached, remove the drive tooling and deploy the sample barrel with a liner and a drive tip. 4. Advance the sample barrel through the desired sample interval and retrieve the sample by retrieving the rods. 5. Retrieve the soil by sliding the liner from the sample barrel.The liner may need to be removed using a hydraulic extruder. 6. Wipe the outside of the sealed liner with a paper towel and mark the depth on the outside of the liner with a marker. 7. Open the sampler to access the soil by cutting twice along the liner length using a hook-blade utility knife. Typically, a ground cover should be placed in the working area so that soil unsettled from the liner does not fall to the ground. 4.3 Sample Collection For all soil samples, follow these general steps: 1. Remove bits of vegetation and large gravel from the sample as these items are not analyzed and reduce the available sample volume for analysis. 2. Take care to prevent cross-contamination and misidentification of samples. 3. Properly label the sample according to SWE-FSOP-002 (Field Sample Management). 4. Record the sample location (horizontal and vertical position),the sample date and time, and any other applicable information in the field notebook and on any applicable sampling forms before moving on to another sampling location. Note that samples collected from a soil recovery device during drilling should be collected from a discrete (short) depth interval. 5. Decontaminate any reusable sampling equipment according to the SWE-FSOP-801 (Equipment Decontamination) before moving on to another sampling location. 6. Properly package and ship all samples according to SWE-FSOP-002 (Field Sample Management). 7. Samples collected for VOCs/TPH-GRO shall be collected first, with the least disturbance possible, and immediately preserved.The collection should be performed using a TerraCore, EnCore, or equivalent sampler(defined in the project work plan)to collect a pre-determined volume. Place samples directly into a laboratory-supplied jar/vial and preserve them. 8. Samples submitted for other analyses are collected after soil is homogenized. Collect a non-volatile grab sample using a sample spoon or gloved hand and place the soil into a re-sealable plastic bag or bowl/pan/tray to homogenize the soil. Place the homogenized soil directly into a laboratory- supplied jar and preserve it as directed in the project work plan. Page 11 of 15