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15 September 2003 <br />AGE-NC Project No. 03-1064 <br />Page 5 of 6 <br />4.1. PROBE BORING ADVANCEMENT <br />The probe boring will be advanced using a 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 />hammer to drive soil sampling tools to specified depths. <br />4.1.1. Soil Sample Collection and Analysis <br />The soil boring will be sampled at discreet five-foot intervals using a 1.5-inch Geoprobe soil <br />sampling assembly loaded with four six-inch brass sleeves. Upon sample retrieval, the ends of the <br />second sleeve will be covered with 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 procedure to a DHS-certified laboratory. Each sample sleeve will <br />be labeled with the boring designation, depth, time, date and sampler's initials. Soils encountered in <br />the borings will be visually classified by an AGE geologist in accordance with the Unified Soil <br />Classification System (USCS). 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 (PD). <br />4.2. EQUIPMENT DECONTAMINATION <br />Prior to use, all sampling tools used for sampie 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 />4.3. BORING ABANDONMENT <br />All probe borings will be permanently sealed to prevent vertical migration ofpotential contaminants. <br />Soil borings shall be abandoned by backfilling with portland cement from the total depth to surface <br />grade. <br />Advanced GeoEnvironmental, Inc.