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\' �./ <br /> 19 May 2005 <br /> AGE-NC Project No. 02-0926 <br /> Page 5 of 5 <br /> 3.3. CPT SOIL SAMPLING <br /> Soil samples will be collected utilizing a 2-inch diameter piston soil sampling assembly loaded with <br /> pre-cleaned stainless steel sleeves. Upon soil sample retrieval, a sleeve will be removed from the <br /> sampler. The ends of the sleeve will be immediately covered with Teflon sheets,sealed with plastic <br /> end caps, secured with tape and immediately placed in a chilled container for transportation to a <br /> DHS-certified laboratory. Each sample sleeve will be labeled with the location,boring designation, <br /> depth, time, date and sampler's initials. <br /> Soil sample duplicates will be monitored for the presence of organic vapor using a photo-ionization <br /> detector (PID: Thermo Environmental 580B, 10.0 eV, calibrated to isobutylene) and the readings <br /> will be recorded on boring logs. Soil sample duplicates will be visually described using the Unified <br /> Soil Classification System (USCS) and the descriptions will be recorded on the boring logs. <br /> 3.4. EQUIPMENT DECONTAMINATION <br /> All sampling tools used for sample collection will be thoroughly rinsed with clean water after being <br /> washed with a solution ofAlconox.All down-hole drilling and sampling equipment will be pressure <br /> washed prior to starting each boring. <br /> 3.5. BORING DESTRUCTION <br /> All soil borings will be permanently sealed to prevent vertical migration of potential contaminants. <br /> Soil borings shall be abandoned by backfilling with bentonite or cement-bentonite slurry from the <br /> total depth to surface grade.The EHD will be notified for grout inspection at least 48 hours prior to <br /> conducting grouting procedures. <br /> Advanced GeoEnvironmental,Inc. <br />