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deepest 6-inch liner. Once the samples are brought to surface, the split <br />barrel will be quickly disassembled, and the deepest 6-inch sample liner will <br />be removed and capped with teflon and a plastic cap which will be taped with a <br />special adhesive-less tape to retain the original moisture content and any <br />volatile constituents. Field measurements of volatile constitutents will be <br />immediately made from the 6-inch soil sample using an HNu photo-ionization <br />meter. Decontamination of the samplers consists of swabbing and washing in a <br />water bucket to remove soil particles and by steam cleaning the samplers, <br />rinsing and washing with Liquinox (or equivalent), rinsing with tap water, and <br />final rinsing with distilled water. The decontaminated sampler will be then <br />assembled while drilling the next interval. Meanwhile, the previously <br />decontaminated sampler will be connected to the drilling rods, ready for <br />subsequent sampling. <br />Soil samples will be labeled with the project number, date, boring number, <br />sample number, interval and time collected, then stored in refrigerated <br />containers, and released to the contracted laboratory at the end of the work <br />day under chain-of-custody procedures explained in the following section. <br />Boring logs will be prepared and submitted using the Unified Soil <br />Classification System for soils and unconsolidated materials. All drilling, <br />sampling and well installation will be under the direct supervision of a MARK <br />geologist/hydrogeologist who in turn is supervised by a MARK Certified <br />Engineering Geologist. The appropriate soil descriptions, stratigraphic <br />changes, geologic notation, sampling intervals and recoveries, blow counts, <br />drilling conditions, groundwater levels, and other required transient data <br />will be recorded on the field logs.