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28 June 2007 <br />AGE-NC Project No. 05-1110 <br />Page 5 of 5 <br />sleeve will be covered with Teflon sheets, capped and sealed with tape. <br />Appropriately sealed and labeled samples will be placed in a chilled container under ice and <br />transported under chain-of-custody procedure to a DHS-certified laboratory. Each sample sleeve will <br />be labeled with the boring designation, depth, time, date and sampler's initials. Soils encountered in <br />the borings will be visually classified by an AGE geologist in accordance with the Unified Soil <br />Classification System (USCS). Additionally, soil samples will be field-screened for the presence of <br />volatile organic compounds using an organic vapor meter (OVM), equipped with photo-ionization <br />detector (PID). <br />4.3. GRAB GROUND WATER SAMPLING PROCEDURES <br />For the collection of grab ground water samples, soil probe borings will be advanced to the top of <br />the ground water table as identified by collection of a saturated soil sample. Once ground water has <br />been encountered, a Geoprobe push-driven water sampling device will be advanced two to three feet <br />into the water-bearing zone. Grab ground water sample will be collected using a Geoprobe water <br />sampling assembly fitted with a pre-cleaned, one-inch diameter 0.01-slotted temporary well screen. <br />The ground water sample will be extracted by lowering a polyethylene bailer through the hollow <br />center of the push rods into the screen section. <br />Appropriately sealed and labeled samples will be placed in a chilled container under ice and <br />transported under chain-of-custody procedure to a DHS-certified laboratory. Each sample container <br />will be labeled with the boring designation, time, date and sampler's initials. <br />4.4. 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 />4.5. BORING ABANDONMENT <br />The probe borings will be permanently sealed to prevent vertical migration of potential <br />contaminants. Soil boring shall be abandoned by backfilling with portland cement from the total <br />depth to surface grade. <br />Advanced GeoEnvironmental, Inc.