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28 February 2006 <br /> AGE-NC Project No. 06-1390 <br /> Page 6 of 6 <br /> 4.5, BORING ABANDONMENT <br /> The probe boring will be permanently sealed to prevent vertical mi <br /> Soil boring shall be abandoned by backfilling with <br /> migration ofpotentia]contaminants. <br /> grade. Portland cement from the total depth to surface <br /> Advanced GeoEnvironmental,Inc. <br />