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. 22 June 2001 <br /> AGE-NC Prod ect No 01-0839 <br /> Page 7 of 7 <br /> 4 3 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 drilling augers will be cleaned prior to <br /> advancement at each soil boring location <br /> 4 4 BORING ABANDONMENT <br /> All soil borings will be permanently sealed to prevent vertical migration of contaminants Soil <br /> borings shall be abandoned by backfilling through the augers with portland cement slurry from the <br /> total depth to surface grade <br /> Advanced GeoEnrnronmental,Inc <br />