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S <br /> • II <br /> 18 August 2000 <br /> AGE-NC Project No . 00 - 0753 <br /> Page 5 of 5 <br /> 4 .4 . EQUIPMENT DECONTAMINATION <br /> Prior to use, all sampling tools used for sample 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 . 5 . BORING ABANDONMENT <br /> All probe borings will be permanently sealed to prevent vertical migration of contaminants . Soil <br /> borings shall be abandoned by backfilling with portland cement from the total depth to surface grade. <br /> Advanced GeoEnvironmental, Inc. <br />