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15 April 2003 <br /> AGE-NC Project No. 02-0950 . . . -- <br /> Page 10 of 10 <br /> 4.6. EQUIPMENT DECONTAMINATION' . .' <br /> _ <br /> All sampling tools used for sample collection will be thoroughly,rinsed with clean water after being. <br /> washed with a solution of Alconox.All.down-hole drilling and sampling equipment will be pressure - - <br /> washed prior to starting each boring. . <br /> 4.7. BORING ABANDONMENT <br /> Any 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 WD:will be notified for-grout . <br /> inspection at least 72 hours prior to grouting the borings. _ <br /> Advanced GeoEnvironmental,Inc. <br />