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%t./ r..d <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 Ce0Environment2i, Inc. <br />