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27 August 1999 <br /> AGE-NC Project No. 99-0635 <br /> Page 4 of 4 <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 /> 3.3. GROUND WATER SAMPLING PROCEDURES <br /> For the collection of"grab" ground water samples, soil probe borings will be advanced to the top <br /> of the ground water table as identified by collection of a saturated soil sample. The depth to ground <br /> water in the area is approximate 10 feet bsg. Once ground water has been encountered, a Geoprobe <br /> push-driven water sampling device will be advanced two to three feet into the water bearing zone. <br /> Grab ground water samples will be collected using a Geoprobe water sampling assembly fitted with <br /> a pre-cleaned one-inch 0.01 slotted temporary well screen. Each ground water sample will be <br /> extracted by lowering a Teflon bailer through the hollow center of the push rods into the screen <br /> section. Samples for BTEX, TPH-g and fuel oxygenate analyses will be collected in laboratory- <br /> supplied, 40-m1 VOA vials containing 0.5-m1 of hydrochloric acid as sample preservative. The <br /> labeled vials will be placed in a chilled container under ice and transported under chain-of-custody <br /> to a DHS-certified laboratory. <br /> 3.4. EQUIPMENT DECONTAMINATION <br /> All sampling tools used for sample collection will be thoroughly washed with a solution of Alconox <br /> and rinsed with clean water. All probing rods will be cleaned prior to advancement at each probe <br /> boring location. <br /> 3.5. BORING ABANDONMENT <br /> Soil probe borings will be abandoned by backfilling with bentonite or cement-bentonite slurry from <br /> the total depth to surface grade. Following backfilling, each boring will be appropriately completed <br /> at ground surface with concrete or asphalt. <br /> Adrmrced GeoEnvironmental,Inc. <br />