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01 November 2011 <br /> AGE-NC Project No. 11-2006 <br /> Page 3 of 4 <br /> GRAB GROUND WATER SAMPLE COLLECTION AND ANALYSIS <br /> For the collection of grab ground water samples, the soil boring will be advanced to the top <br /> of the ground water table as identified by collection of a saturated soil sample. Once <br /> ground water has been encountered, a Geoprobe@ push-driven water sampling device will <br /> be advanced approximately four feet into the water-bearing zone. Grab ground water <br /> sample will be collected using a Geoprobe®water sampling assembly fitted with fitted with <br /> a new PVC one-half inch diameter 0.010-inch slotted temporary well screen. The ground <br /> water sample will be extracted using inertial action by lowering tubing with a check value, <br /> through the hollow center of the push rods into the screen section. <br /> Each ground water sample is collected into four laboratory supplied 40-ml volatile organic <br /> analysis (VOA) vials and one laboratory supplied 1-liter amber bottle, both without <br /> preservative. Following collection, appropriately sealed and labeled samples will be placed <br /> in a chilled container under ice and transported under chain-of-custody procedures to a <br /> CDPH-certified laboratory for analysis of TPH-all and VOCs. Each sample container will <br /> be labeled with the boring designation, time, date and sampler's initials. <br /> EQUIPMENT DECONTAMINATION <br /> Prior to use, all sampling tools used for sample collection will be thoroughly rinsed with <br /> clean water after being washed with a solution of Alconox. All probing rods will be cleaned <br /> prior to advancement at each probe boring location. <br /> BORING ABANDONMENT <br /> The probe borings will be permanently sealed to prevent vertical migration of potential <br /> contaminants. Each soil boring shall be backfilled to surface grade with neat cement and <br /> covered with concrete. <br /> Advanced GeoEnvironmental,Inc. <br />