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ARCADIS SOP:Soil Drilling and Sample Collection 5 <br /> Rev.M. 1 Rev Date: March 3,2009 <br /> VI. Procedure <br /> Drilling Procedures ' <br /> The drilling contractor will be responsible for obtaining accurate and representative ' <br /> samples; informing the supervising geologist of changes in drilling pressure;and <br /> keeping a separate general tog of soils encountered, including blow counts(i.e., the <br /> number of blows from a soil sampling drive weight(140 pounds]required to drive the ' <br /> split-barrel sampler in 6Anch increments). Records will also be kept of occurrences of <br /> premature refusal due to boulders or construction materials that may have been used <br /> as fill. Where a boring cannot be advanced to the desired depth,the boring will be ' <br /> abandoned and an additional boring will be advanced at an adjacent location to obtain <br /> the required sample. Where it is desirable to avoid leaving vertical connections <br /> between depth intervals,the borehole will be sealed using cement and/or bentonite. ' <br /> Multiple refusals may lead to a decision by the supervising geologist to abandon that <br /> sampling location. <br /> Soil Sampling Procedures <br /> Samples of subsurface materials encountered while drilling soil borings will be ' <br /> collected using one of the following methods: <br /> • 2-inch split-barrel(split-spoon)sampler, if using the ASTM D 1586-Standard <br /> Test Method for Penetration Test and Split-Barrel Sampling of Soils ' <br /> • Plastic internal soil sample sleeves if using direct-push drilling. <br /> Soil samples are typically field screened with an FID or PID at sites where volatile ' <br /> organic compounds are present in the subsurface. Field screening is performed using <br /> one of the following methods: ' <br /> • Upon opening the sampler,the soil is split open and the PID or FID probe is <br /> placed in the opening and covered with a gloved hand. Such readings should be ' <br /> obtained at several locations along the length of the sample <br /> • A portion of the collected sample is placed in a jar,which is covered with <br /> aluminum foil, sealed, and allowed to warm to room temperature. After warming, <br /> the cover is removed, the foil is pieced with the FID or PID probe, and a reading <br /> is obtained. <br /> g:kepiDrryvlomrned e0ns20omh#ftp ftWe e3I5I"-*a&MV@Vb"w.ea6ndoe <br />