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ARCADIS SOP: Soil Drilling and Sample Collection 5 Rev.#: 21 Rev Date: March 8, 2011 keeping a separate general log of soils encountered, including blow counts (i.e., the number of blows from a soil sampling drive weight[140 pounds] required to drive the split-barrel sampler in 6-inch increments). The term"samples" means soil materials from particular depth intervals,whether or not portions of these materials are submitted for laboratory analysis. Records will also be kept of occurrences of premature refusal due to boulders or construction materials that may have been used as fill. Where a boring cannot be advanced to the desired depth, the boring will be abandoned and an additional boring will be advanced at an adjacent location to obtain the required sample. Where it is desirable to avoid leaving vertical connections between depth intervals, the borehole will be sealed using cement and/or bentonite. Multiple refusals may lead to a decision by the supervising geologist to abandon that sampling location. Soil Characterization Procedures Soils encountered while drilling soil borings will be collected using one of the following methods: • 2-inch split-barrel (split-spoon)sampler, if using the ASTM D 1586-Standard Test Method for Penetration Test and Split-Barrel Sampling of Soils • Plastic internal soil sample sleeves if using direct-push drilling. Soils are typically field screened with an FID or PID at sites where volatile organic compounds are present in the subsurface. Field screening is performed using one of the following methods: • Upon opening the sampler, the soil is split open and the PID or FID probe is placed in the opening and covered with a gloved hand. Such readings should be obtained at several locations along the length of the sample • A portion of the collected soil is placed in ajar,which is covered with aluminum foil, sealed, and allowed to warm to room temperature.After warming, the cover is removed, the foil is pieced with the FID or PID probe, and a reading is obtained. Samples selected for laboratory analysis will be handled, packed, and shipped in accordance with the procedures outlined in the Work Plan, FSP, or Chain-of-Custody, Handling, Packing, and Shipping SOP. A geologist will be onsite during drilling and sampling operations to describe each soil interval on the soil boring log, including: