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,-PW. <br /> 1 November 2005 <br /> AGr-NC Project No. 97-0327 <br /> Page 8 of 8 <br /> DHS-certified laboratory for analysis. <br /> 5.3. EQUIPMENT DECONTAMINATION <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 /> 5.4. BORING DESTRUCTION <br /> All soil borings will be permanently sealed to prevent vertical migration of potential contaminants. <br /> At the completion of CPT and soil/ground water sampling activities,all CPT and sample soil borings <br /> will be backfilled by inserting hollow steel rods to total depth of each boring and backfilling with <br /> a portland cement grout mix;the EHD will be notified at least 48 hours in advance of field work and <br /> given the opportunity to inspect the grout mix prior to backfilling activities. <br /> Advanced GeoEnvironmentsl,Inc. <br />