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10 July 2007 <br /> AGE-NC Project No. 06-1524 <br /> Page 5 of 5 <br /> 4.3. GRAB GROUND WATER SAMPLING PROCEDURES <br /> For the collection of grab ground water samples, the soil probe boring will be advanced to the top <br /> of the ground water table as identified by collection of a saturated soil sample. Once ground water <br /> has been encountered,a Geoprobe push-driven water sampling device will be advanced two to three <br /> feet 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. Lach 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 f'or 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 boring will be permanently sealed to prevent vertical migration of potential contaminants. <br /> Soil boring shall be abandoned by backfilling with portland cement from the total depth to surface <br /> grade. <br /> Advanced GeoEnvironmental.Inc. <br />