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O1 February 2001 <br /> AGE-NC Project No. 00-0791 <br /> Page 4 of 4 <br /> 4.2. SOIL SAMPLING COLLECTION AND ANALYSIS <br /> Soil borings will be sampled at discreet five-foot intervals using a 1.125" Geoprobe soil sampling <br /> assembly loaded with four six-inch brass sleeves. Upon sample retrieval, the ends of the second <br /> sleeve will be covered with Teflon sheets, capped and sealed with tape. <br /> Appropriately sealed and labeled samples will be placed in a chilled container under ice and <br /> transported under chain-of-custody procedure to aDHS-certified laboratory.Each sample sleeve will <br /> be labeled with the boring designation,depth,time,date and sampler's initials. Soils encountered in <br /> the borings will be visually classified by an AGE geologist in accordance with the Unified Soil <br /> Classification System(USCS).Additionally,soil samples will be field screened for the presence of <br /> volatile organic compounds using an organic vapor meter(OVM), equipped with photo-ionization <br /> detector(PID). <br /> 4.3. GRAB GROUND WATER SAMPLING PROCEDURES <br /> For the collection of`grab'groundwater samples,selected probe borings will be advanced to a depth <br /> of four feet below the ground water surface. The grab ground water samples will be collected using <br /> a Geoprobe water sampling assembly with a wire-wound steel screen or a pre-cleaned one-inch <br /> diameter, 0.01 slotted screen. Each ground water sample will be extracted by lowering a Teflon <br /> bailer through the hollow center of the push rods into the screened section.Samples will be collected <br /> in laboratory-supplied,40-m1 VOA vials containing 0.5 ml hydrochloric acid as sample preservative <br /> and 1-liter amber bottles. The labeled vials will be placed in a chilled container under ice and <br /> transported 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 cement from the total depth to surface grade. <br /> Advanced GeoEnvironmental,Inc. <br />