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18 March 2002 <br /> AGE-NC Project No. 00-0729 <br /> Page 5 of 5 <br /> 4.2. SOIL SAMPLING COLLECTION AND ANALYSIS <br /> Soil borings will be sampled at discreet five-foot intervals using a 1.25" 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. Each sealed sleeve will be <br /> labeled with the boring designation, depth, time, date and sampler's initials, placed in a chilled <br /> container under ice and transported under chain-of-custody to a DHS-certified laboratory. <br /> Soils encountered in the borings will be visually classified by an AGE geologist in accordance with <br /> the Unified Soil Classification System(USCS).Additionally,soil samples will be field screened for <br /> the presence of volatile organic compounds using an organic vapor meter (OVM), equipped with <br /> photo-ionization detector(PID). <br /> 4.3. GRAB GROUND WATER SAMPLING AND ANALYSIS <br /> For the collection of`grab'ground water 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-inch 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 /> into laboratory-supplied, 40-m1 VOA vials containing 0.5 ml hydrochloric acid as sample <br /> preservative and into one-liter amber bottles without a preservative. The labeled containers will be <br /> placed in a chilled container under ice and transported under chain-of-custody to a DHS-certified <br /> laboratory. <br /> 4.4. EQUIPMENT DECONTAMINATION <br /> Prior to use, all tools used for sample collection will be thoroughly rinsed with clean water after <br /> being washed with a solution of Alconox. All probing rods will be cleaned prior to advancement at <br /> each probe boring location. <br /> 4.5. BORING ABANDONMENT <br /> All soil borings will be permanently sealed to prevent vertical migration of potential contaminants. <br /> Soil borings shall be abandoned by backfilling with a portland cement slurry from the total depth to <br /> surface grade. The EHD will be notified for grout inspection at least 72 hours prior to conducting <br /> grouting procedures. <br /> Advanced GeoEnvironmental,Inc. <br />