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24 February 2009 <br /> AGE-NC Project No. 97-0343 <br /> Page 4 of 4 <br /> 3.3. BORING ABANDONMENT <br /> All probe borings will be permanently sealed to prevent vertical migration of potential contaminants. <br /> Soil borings shall be abandoned by backfilling with portland cement from the total depth to surface <br /> grade. <br /> r <br /> Advanced GeoEnvironmental,Inc. <br />