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25 April 2000 <br /> AGE-NC Project No. 95-0143 <br /> Page 4 of 4 <br /> second sleeve will be covered with Teflon sheets, capped and sealed with tape. Each sample sleeve <br /> will be labeled with the boring designation, depth, time, date and sampler's initials. <br /> Appropriately sealed and labeled samples will be placed in a chilled container on ice and transported <br /> under chain-of-custody procedure to Curtis & Tompkins, Ltd, a DHS-certified laboratory. Soils <br /> encountered in the borings will be visually classified by an AGE geologist in accordance with the <br /> Unified Soil Classification System(USCS). Additionally, soil samples will be field screened for the <br /> presence of volatile organic compounds using an organic vapor meter(OVM), equipped with photo- <br /> ionization detector(PID). <br /> 4.3. GRAB GROUND WATER SAMPLING PROCEDURES <br /> For the collection of`grab' ground water samples, probe boring 1613-6 will be advanced to a depth <br /> of approximately 18 feet bsg;boring 16B-7 will be advanced to approximately 50 feet bsg. The grab <br /> ground water samples will be collected using a Geoprobe water sampling assembly with a pre- <br /> cleaned 0.01 slotted PVC screen. The ground water samples will be extracted with a positive <br /> displacement Teflon sample tubing and ball bearing assembly inserted through the hollow center of <br /> the push rods into the screened section. The samples will be collected in laboratory-supplied, 40-m1 <br /> VOA vials containing 0.5 ml hydrochloric acid as sample preservative, 1-liter amber bottles and <br /> plastic bottles. The labeled bottles will be placed in a chilled container under ice and transported <br /> under chain-of-custody to a DHS-certified laboratory. <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 /> All probe borings will be permanently sealed to prevent vertical migration of contaminants. Soil <br /> borings shall be abandoned by backfilling with portland from the total depth to surface grade. <br /> Advanced GeoEnvironmental,Inc. <br />