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24 July 2000 <br /> AGE-NC Project No. 00-0736 <br /> Page 7 of 8 <br /> equipped with 1.25-inch probing rods. The Geoprobe advances soil probe borings using a hydraulic <br /> hammer to drive soil sampling tools to specified depths. <br /> 4.2.1. Soil Sampling Collection and Analysis <br /> Soil boxings will be sampled continuously using a 2-inch diameter Geoprobe macro-soil sampling <br /> assembly and a two-inch diameter four-foot Teflon sleeve. Upon sample retrieval, the ends of the <br /> liner will be cut and the open ends of the section of soil desired for analysis will be covered with <br /> Teflon sheets, capped and sealed with tape. <br /> Appropriately sealed and labeled samples will be placed in a chilled container under ice and <br /> transported under chain-of-custody to a DHS-certified laboratory.Each sample sleeve will be labeled <br /> with the boring designation,depth,time,date and sampler's initials. Soil samples encountered in the <br /> borings will be visually classified by an AGE geologist in accordance with the Unified Soil <br /> Classification System(US CS).Additionally, soil samples will be field-screened for the presence of <br /> volatile organic compounds using an organic vapor meter(OVM), equipped with photo-ionization <br /> detector(PID). <br /> 4.2.2. Grab Ground Water Sampling Procedures <br /> For the collection of`grab' ground water samples,probe borings will be advanced to a depth of four <br /> feet below the ground water surface. The grab ground water samples will be collected using a <br /> Geoprobe water sampling assembly with a wire-wound steel screen or a pre-cleaned one-inch <br /> diameter, 0.01 slotted screen. Each ground water sample will be extracted by lowering a Teflon <br /> bailer through the hollow center of the push rods into the screened section. Samples will be collected <br /> in laboratory-supplied,40-m1 VOA vials containing 0.5 ml hydrochloric acid as sample preservative <br /> and into 1/2-gallon plastic bottle with no preservative. The labeled sample containers will be placed <br /> in a chilled container under ice and transported under chain-of-custody to a DHS-certified laboratory. <br /> 4.2.3. Equipment Decontamination <br /> Prior to use,all sampling tools used for sample collection will be thoroughly rinsed with clean water <br /> after being washed with a solution of Alconox. All probing rods will be cleaned prior to <br /> advancement at each probe boring location. <br /> Advanced GeoEnvironmental,Inc. <br />