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J <br /> 17 June 2003 <br /> AGE-NC Project No. 03-1035 <br /> Page 6 of 6 <br /> 4.1.2. In-situ 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 samples 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 /> Each ground water sample will be extracted by lowering a polyethylene bailer through the hollow <br /> center of the push rods into the screen section. Samples for TPH-g,BTEX, fuel oxygenate and lead <br /> analyses will be collected into laboratory-supplied, 40-m1 volatile organic analysis (VOA) vials <br /> containing 0.5-m1 of hydrochloric acid as sample preservative and 500-m1 plastic containers. <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 /> 4.2. 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 /> 4.3. BORING ABANDONMENT <br /> The probe boring 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 />