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D <br />HE <br />D <br />us <br />11 <br />[1 <br />13 November 2007 <br />AGE -NC Project No. 07-1569 <br />Page 6 of 6 <br />4.3. GRAB GROUND WATER SAMPLE COLLECTION <br />r1 <br />If ground water is encountered during the excavation, grab ground water samples will be collected <br />using plastic disposable bailers. Water samples will be field screened for obvious signs of petroleum <br />hydrocarbon impacts to ground water (i.e. sheen on the water, staining, odor). Grab ground water <br />samples will then be transferred into laboratory -supplied 40-m1 VOA vials, l -liter amber bottles, and <br />plastic sample containers as appropriate for the required analysis. <br />Following sample collection, each grab ground water sample will be labeled with the sample <br />location, depth, time, date and sampler's initials. Appropriately sealed and labeled samples will be <br />placed in a chilled container under ice and transported under chain -of -custody procedure to CTEL <br />for analysis. <br />4.4. EXCAVATION BACKFILLING PROCEDURES <br />The excavation will be backfilled with the removed material, if it has been determined to be clean <br />or uncontaminated. If the excavated material is determined to be impacted, clean fill soil will be <br />imported from other areas of the site or from off-site, for backfilling purposes. <br />4.5. EQUIPMENT DECONTAMINATION <br />All sampling tools used for sample collection will be thoroughly washed with a solution of Alconox <br />and rinsed with clean water prior to each sampling location. <br />Advanced GeoEnvironmental, Inc. <br />