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a <br /> 15 January 1999 <br /> AGE-NC Project No. 98-0540 <br /> Page 4 of 4 <br /> 4.1. PROBE BORING ADVANCEMENT <br /> Probe borings will be advanced using AGE's van-mounted Geoprobe 5400 direct-push probing unit <br /> equipped with 1.25-inch probing rods. The Geoprobe advances soil probe borings using a hydraulic <br /> or pneumatic hammer to drive soil and ground water sampling tools to specified depths. <br /> 4.2. SOIL SAMPLING PROCEDURES <br /> Soil samples will be collected using Geoprobe push-driven 2-inch diameter discrete and/or <br /> continuous core samplers fitted with four six-inch long brass sleeves or a four-foot long Teflon <br /> sleeve,respectively.Upon removal from the sampler,the sample sleeve is separated with a clean soil <br /> knife. The exposed ends of the sleeve will be covered with Teflon sheets, capped and sealed with <br /> tape. Soils encountered in the borings will be visually classified by an AGE geologist in accordance <br /> with the Unified Soil Classification System (USCS). Additionally, soil samples with be field <br /> screened for the presence of volatile organic compounds using an OVM. <br /> Following sample collection, each preserved sample sleeve will be labeled with the boring location, <br /> depth,time, date and sampler's initials. Appropriately sealed and labeled samples will be placed in <br /> a chilled container under ice and transported under chain-of-custody procedure to a DHS-certified <br /> laboratory. <br /> 4.3. EQUIPMENT DECONTAMINATION <br /> All sampling tools used for sample collection will be thoroughly rinsed with clean water after being <br /> washed with a solution of Alconox. All probing rods will be cleaned prior to advancement at each <br /> probe boring location. Hollow-stem augers-,rill be steam-cleaned prior to each boring. <br /> 4.4. BORING ABANDONMENT <br /> All soil borings will be abandoned by backfilling with bentonite or cement-bentonite slurry from the <br /> total depth to surface grade. <br /> Advanced CeoEnvironmental,Inc. <br />