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23 June 2000 <br /> AGE-NC Project No 98-0511 <br /> Page 8 of 8 <br /> kept in a cooler until delivered to the laboratory for analysis Chain-of-custody forms will be used <br /> to document sample custody transfer from the field to the analytical laboratory, and accompany the <br /> samples <br /> 4 5 EQUIPMENT DECONTAMINATION <br /> All sampling tools used for sample collection will be thoroughly washed with a solution of Alconox <br /> and rinsed with clean water prior to use at each sampling location Hollow-stem augers will be <br /> steam-cleaned prior to advancing each pilot boring <br /> 4 6 BORING ABANDONMENT <br /> All soil borings not completed as monitoring wells will be permanently sealed to prevent vertical <br /> migration of potential contaminants Soil borings shall be abandoned by backfilling with bentonite <br /> or cement-bentonite slurry from the total depth to surface grade The PHS-EHD will be notified for <br /> • grout inspection at least 48 hours prior to grout emplacement <br /> Advanced GeoEnvironmental,Inc <br />