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-VA10' <br /> 25 April 2007 <br /> AGE-NC Project No. 95-0106 <br /> Page 5 of 5 <br /> After collection of the sample, soil vapor from the polyethylene tubing will be monitored for the <br /> presence of volatile organics using a photo-ionization detector(PID)pre-calibrated to isobutylene. <br /> 3.4. 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 /> 3.5. BORING ABANDONMENT <br /> All probe borings will be permanently sealed to prevent vertical migration of potential contaminants. <br /> Soil borings shall be abandoned by backfilling with portland cement from the total depth to surface <br /> grade. <br /> Advanced GeoEnvironmental,Inc. <br />