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4. Open a small portion of the bag sufficient to only insert the PID sensor tip. Take care not to push sensor tip into the soil or potential water. Conduct the PID sensor reading of the sub-soil. Wait to confirm that the"ready light" is steady prior to removing the PID sensor from the bag. 5. Record the PID reading on the appropriate field log. Soil sample collection will target depths where elevated PID reading of VOCs concentrations occurred. Anticipated sample depth intervals are 5 feet, 15 feet, and 25 feet bgs. Soil sample collection will follow EPA Method 8035 using EnCore° sampling devices (or equivalent) and the general procedure described below(AMS-830-19-0313; see Appendix C): 1. Obtain EnCore° device and T-Handle (or equivalent). 2. Put on a new, clean, and chemical-resistant pair of disposable gloves prior to taking the sample.The sampler will test the plunger for free movement by pushing the plunger rod down until it rests against the tabs. 3. The locking lever on the EnCore°T-Handle must be depressed as the cartridge is inserted. Line up the slots on the cartridge with the locking pins in the T-Handle. Plunger end first, insert cartridge into T-Handle with locking tabs aligned, and twist cartridge clockwise locking the cartridge in place. 4. Apply EnCore°, as quickly as possible, to freshly exposed surface soil or from one end of a sleeve core as soon as it is brought to the surface. Holding the device with the T-Handle up and the cartridge down, insert the sampling device into the soil. The coring body must be full and be checked to make sure the plunger end is seen in the viewing hole. Withdraw sampling device from soil and wipe off excess dirt from cartridge body. 5. The EnCore°cartridge core is capped while it is still on the T-Handle. Push or twist cap on until the groves are seated over the ridge of the coring body. 6. Remove the capped sampler by pushing down the locking lever on T-Handle and twisting and pulling sampler from T-Handle. The plunger is locked by rotating plunger rod until the wings rest against the tabs.Attach the label and seal the cartridge in the EnCore° sampler bag. 7. The EnCore° sampler holding time is 48 hours. Soil samples are shipped to the laboratory for preservation or freezing within the 48-hour holding time. After preservation, the soil sample can be held up to 14 days for analysis. 8. Label, package, and prepare the samples for shipment to the laboratory. Place the samples in sample cooler after collection. Due to short holding times,if soil samples for VOCs are collected on a Friday, additional coordination with the laboratory is required. FINAL RIPON PCE INVESTIGATION WORK PLAN.DOCX 4-6 PROJECT NO.631021512