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21 July 1999 <br /> AGE-NC Project No. 99-0611 <br /> Page 4 of 4 <br /> 3.4. BORING ABANDONMENT <br /> Soil probe borings will be abandoned by backfilling with portland cement or portland cement- <br /> bentonite slurry from the total depth to surface grade utilizing a tremmie pipe. Following backfilling, <br /> each boring will be appropriately completed at ground surface with concrete or asphalt. <br /> Advanced GeoEnvironmental,Inc. <br />